Plant for burning low-concentration combustible gas at pressure above atmospheric

FIELD: burning combustible gas at pressure above atmospheric.

SUBSTANCE: proposed plant is used for burning lean gases; it consists of unit for burning gas at pressure above atmospheric including lean gas chamber, combustion chamber, heat regeneration section and exhaust; pipe line supplying lean gas to lean gas chamber; heat removal and pressure equalizing chamber and preheated air chamber; plant is also provided with pipe line supplying the compressed surrounding air to heat removal and pressure equalizing chamber, preheated air pipe line for delivery of preheated air to preheated air chamber; provision is made for hole for delivery of lean gas from lean gas chamber to combustion chamber and hole for delivery of preheated air from preheated air chamber to combustion chamber. Heat removal and pressure equalizing chamber is made for heat exchange between lean gas chamber, preheated air chamber and combustion chamber and compressed surrounding air; lean gas and preheated air are burnt in combustion pressure at pressure above atmospheric.

EFFECT: enhanced efficiency; minimum difference in pressure between gas and air chambers.

12 cl, 12 dwg

 

This invention relates to a method and an apparatus for burning combustible gas at low concentrations under pressure above atmospheric, and more particularly to such an apparatus for combustion, which has a chamber for removal of heat and pressure to protect the combustion chamber from the back pressure created during the combustion process.

PREREQUISITES TO the CREATION of INVENTIONS

In U.S. patent No. 3229746, which is fully incorporated here by reference, shows an installation for heat recovery and the appropriate method for combustion of fuel gas at low concentrations. This patent, as an example, refers to the poor combustion gases, such as exhaust gas catalytic cracking, containing the concentration of carbon monoxide less than 8%, but is not limited to this. The invention in this patent allows to stabilize the combustion of carbon monoxide at a temperature in the range from 1200°F to 1500°F. After running this temperature can be maintained in most cases through the combustion of a single carbon monoxide. In other cases, there is a minimal need for auxiliary fuel for safe ignition and/or to maintain the desired value of heat recovery.

In figure 1 of this application shows the installation for heat recovery at the above U.S. patent. N is 1 installation, in General indicated by callout number 1, forms a combustion zone 2 and zone 3 heat recovery, located horizontally at zero. The gas enters zone 2 of combustion through the chamber 4 for gas and openings 6 for gas. Air is introduced through the chamber 7 for air. The air enters the combustion chamber 2 through the holes 8 for air. Secondary air for combustion of auxiliary fuel enters the combustion chamber through the piping 9. Gas and air are periodically mixed by oppositely directed vortices, guides shown by arrows 11 and 12, which are created by the sending device, shown as sloping pipes 13, which serves a mixture of gases from the chamber 4 for gas holes 6 for gas, and a short pipe 14 for air. Auxiliary burner 16 is provided for the initial heating of the gases in the combustion zone 2 corresponding to the temperature of ignition. Refractory material 17 dcor zone 2 combustion for secondary radiation of heat from the gases here.

Through the installation shown in figure 1, can be burned poor gas, such as carbon monoxide at concentrations less than 8%, such as exhaust gas catalytic cracking. Gas at higher concentrations, of course, can be burned easily. A characteristic symptom of the construction shown in f is 1, is that it requires less than 1% excess oxygen, as measured in the combustion products.

In chamber 2, the combustion temperature in the range from 1200 to 1500°F can be maintained appropriately, since the instigation of the carbon monoxide can usually burn without the need for additional fuel. The heat released by combustion of carbon monoxide in the combustion zone 2. Inside there is a system of heat release, the current in the combustion chamber 2. In terms of the environment of the combustion zone 2 is designed so that there is practically no application of heat or heat in the combustion zone 2 from the environment. In particular, no cooling devices such as heat pipes, not connected with the combustion zone 2.

End wall 18 is formed by a partition 19. Holes 8 for air and openings 6 for the gas passing through the partition 19 for the formation of essentially concentric angular groups in the end wall 18.

Figure 1 shows the exposed brick wall 21 with a nozzle, as forming the channels of the device, which causes the combustion gases to pass through the bounding channels 22, in order thereby to improve the mixing. Zone 3 heat recovery unit 1 is formed by the lower stream after combustion zone 2. The appropriate device for the regeneration of heat, such as steam pipes, the economy is user, superheater, other threads of the fluid, and the like, may be provided in zone 3 heat recovery.

Installation 1 forms an enclosure for zone 2 of a combustion chamber having end walls and side walls, passing between the end walls. All walls are to carry out the secondary radiation of heat in the combustion zone through the refractory material 17. Outlet through which hot gases pass into the zone 3 heat recovery is at the end of the installation 1, opposite the holes 6 for gas and holes 8 for air, and forms a fairly small section of one of the side walls to maintain the secondary radiation of heat from the walls of the fence as possible at the highest level.

In addition, as shown in figure 1, zone 3 heat recovery, which is the only design for heat dissipation from the unit completely removed from exposure to the combustion zone 2. This is comparable with the traditional steam generating units for carbon monoxide, in which the heat dissipation in the form of water pipes is carried out either in the combustion zone, or under the influence of radiation heat of the combustion gases. This internal heat increases requirements in the auxiliary fuel and reduces the observed range of stability of ignition and reliability of the conversion of carbon monoxide.

Install the CA, shown in figure 1, normally operates at high temperatures. For example, a typical poor gas fed into the plant at from 600 to 1100°F or above. As a result of the combustion process combustion gases leaving the combustion zone may be in the range from 1200 to 1800°F or above.

Figure 2 and 3 shows the installation of the prior art, in which adequately to prevent overheating of the plates of the outer casing, which are suitably insulated from the camera to the poor and gas chambers for combustion gases, by using a flow of compressed ambient (cold) air to air, which was founded and is located in these cells. In such devices the compressed ambient air is used as the source of oxidant for combustion as poor gas, and the flow of auxiliary fuel in the installation.

Figure 2 shows a traditional device 200 for combustion, which includes camera 212 for the poor gas chamber 230 combustion zone 240 heat recovery and production of 250. Ambient air is compressed and supplied air pump 220 through line 221 feed into the chamber 230 of combustion. Poor gas 210 is supplied by pipeline 211 feed into the chamber 212 for the poor gas.

Figure 3 shows in more detail the device 300 for burning. The device 300 for combustion contains the camera 312 for the poor gas and the camera 330 combustion. B. the command gas from the chamber 312 for the poor gas enters the chamber 330 of combustion through the opening 317 for gas. Compressed ambient air 320 enters the chamber 330 of combustion through the opening 327 for air. The device 300 for burning insulated refractory lining 301. The combustion gases leave the chamber 330 combustion and go to section 340 heat recovery, usually through a heat exchanger (not shown).

Specialist in the art will appreciate that the appropriate number of auxiliary burners 16 (shown in Fig.1) can be provided as a means to run for the initial heating of the gases in the chamber 230 of combustion (figure 2) or 330 (figure 3) and the desired ignition temperature, or as a means to ensure the level of heat required for heat recovery.

As noted above, such devices are most typically used in processes where poor gas fed into the plant at a certain pressure above atmospheric (e.g., from 0.1 to 5.0 psig psig or higher), and combustion gases usually go in the atmosphere after heat recovery, and in some cases, after purification systems manufactured gas. This, however, results in the pressure within the combustion zone. As noted in figure 2, air is supplied to the unit by means of a pump to meet the pressure requirements. Installation, of course, designed to keep the internal pressure and to resist him. The advantage of theconfiguration installation is in the economy of its construction in connection with the above held therein by pressure, what is the result of the Union of chambers for gas and cameras for indoor air total capacity under pressure. Thus, only nominal pressure differences occur between the respective chambers.

It was found, however, that in the conventional device shown in figure 3, there is a problem. In this design, ambient air is used for cooling the refractory lining 301 camera 330 combustion. Thus, the camera 312 for the poor gas and Luggage 330 combustion are in contact with the ambient air 320. However, for some applications it is required that the surrounding air 320 was preheated before combustion. When this happens, the ambient air temperature 320 may no longer be sufficient to cool the refractory lining 301. In turn, problems with cooling chambers, result in expansion and structural instability of these cameras.

Indeed, it was found that for reasons connected with the process and save energy, the air must be preheated to from about 200 to 600°F or above. In these cases, it was found that the contents of the chamber for air, as defined above, can no longer provide sufficient cooling to avoid technical problems. Accordingly the state, there is a need for a device for burning under pressure above atmospheric, having an internal chamber for removal of heat and pressure.

The INVENTION

The objective of this invention is the provision of using preheated air for combustion, and at the same time preserving the advantages of the design in the form of minimum differential pressure between the respective chambers for gas and air.

Another objective of this invention is to provide a device for combustion under pressure above atmospheric, having an internal chamber for removal of heat and pressure equalization. Another objective of the invention is to provide such a device for burning, which is used with preheated air for combustion.

In one aspect the present invention provides for the installation of combustion under pressure above atmospheric combustible gas at low concentrations - poor gas, which includes a device for combustion under pressure above atmospheric, with the camera for the poor gas, a combustor, a heat recovery area and release the pipe feeding the poor gas for the supply of the poor gas into the chamber for the poor gas chamber for heat dissipation and pressure equalization and Luggage for preheated air wew and device for combustion, the supply line of compressed ambient air to the compressed ambient air into the chamber to heat and pressure, the pipe feeding the preheated air for supplying preheated air into the chamber preheated air, the hole for the poor gas for the supply of the poor gas from the chamber for the poor gas in the combustion chamber and an outlet for preheated air for supplying preheated air from the chamber for preheated air into the combustion chamber. In the chamber to heat and pressure equalization occurs, the heat transfer from the camera to the poor gas chambers for preheated air and the combustion chamber to the compressed ambient air in the chamber to heat and pressure, and poor gas and preheated air are burned in the combustion chamber under greater than atmospheric pressure.

In the present invention the camera for preheated air can be embedded inside the chamber to heat and pressure.

The present invention includes compressing ambient air to a pressure of from about 0.1 psig to about of 10.0 psig, and more preferably to a pressure of from about 0.1 psig to about 5,0 psig.

The invention also includes a preview Bodog the EB preheated air to a temperature of from about 200 to about 1000° F, and, more preferably, to a temperature of from about 200 to about 600°F.

The invention may also include an increase in the temperature of the compressed ambient air coming from the chamber to heat and pressure to a temperature of not more than about 500°F, and, more preferably, to a temperature of not more than about 300°F.

The invention may also include a heat exchanger within the heat recovery device for combustion to pre-heat the pre-heated air, and in this case the compressed ambient air can escape from the chamber to heat and pressure and fed to the heat exchanger. According to another aspect, the heat source external to the device for combustion, can be used to pre-heat the pre-heated air, and in this case the compressed ambient air from the chamber to heat and pressure equalization can go out and submitted to an external source of heat.

The above and other features, objectives and advantages of the invention become apparent when studying the following detailed description of the invention, the attached claims and the several variants of the invention, which are shown in the drawings.

BRIEF DESCRIPTION of DRAWINGS

Figure 1 represents the slight pressure from the beginning of the projection in terms of installation for heat recovery prior art for burning combustible gas at low concentrations.

Figure 2 is a schematic view of a conventional device for combustion under pressure above atmospheric.

Figure 3 is a schematic view in section, showing details of traditional devices for combustion under pressure above atmospheric.

Figure 4 is a schematic view of the device for combustion under pressure above atmospheric of the present invention.

Figure 5 is a schematic view in section, showing parts of the device for combustion under pressure above atmospheric of the present invention.

6 is a schematic view of another design of the device for combustion under pressure above atmospheric of the present invention.

7 is a schematic view of another design of the device for combustion under pressure above atmospheric of the present invention.

Fig is a schematic view of a traditional setup with two devices for burning operating in parallel.

Fig.9 is a schematic view of another conventional installation of two burning devices operating in parallel.

Figure 10 is a schematic view of another design of the device for combustion under pressure to enter the atmospheric of the present invention.

11 is a schematic view of another design of the device for combustion under pressure above atmospheric of the present invention.

Fig is a schematic view of another design of the device for combustion under pressure above atmospheric of the present invention.

Such number of the reference positions used for similar or corresponding elements in all figures of the drawings.

DETAILED DESCRIPTION of PREFERRED EXAMPLES of EMBODIMENT of the INVENTION

Figure 4 is a schematic view of the device 400 for combustion under pressure above atmospheric in accordance with the first design of the present invention. The device 400 for burning includes camera 412 for the poor gas chamber 430 combustion section 440 heat recovery, heat exchanger 460 and the release of 450. Poor gas 410 is fed through line 411 feed into the chamber 412 for the poor gas. Air pump 420 delivers the incoming compressed air through the pipe 421 filing into the chamber 425 for heat and pressure equalization. Air pump 420 delivers the surrounding air, which is at ambient temperature and ambient pressure. Air pump 420 increases the pressure of the ambient air to from about 0.1 psig to about of 10.0 psig, more preferably to from about to 0 psig to about 5,0 psig. This compressed air passes through the chamber 425 to heat and pressure and is released through conduit 455. This compressed air maintains the chilled metal in the zone 430 combustion by providing adequate insulation and flow velocity.

It was found that a relatively small amount of heat is transferred into the compressed air in the chamber 425 for heat and pressure equalization. Thus, the temperature difference is minimal. In fact, it is preferable that the temperature of the air leaving the chamber 425 for heat and pressure equalization via a pipeline 455, was not more than about 500°F and, more preferably, not exceeding about 300°F. Thus, it was found that the device remains sustainable construction. Now the heated air in the pipeline 455 is supplied to the heat exchanger 460 and out of it as pre-heated air 465 for submission to the camera 430 combustion. The temperature of the preheated air in the pipeline 465 ranges from about 200°F to about 1000°F, and, more preferably, from about 200°F to about 600°F.

The parameters described above, related to the increase in pressure of the surrounding air, the temperature of the air leaving the chamber to heat and pressure, and temperature, p is evritania preheated combustion air, are compatible with constructive examples of implementation described above.

Figure 5 shows additional details of the device 500 for combustion according to the present invention. The device 500 for burning includes camera 512 for the poor gas and the camera 530 combustion. Gas from the chamber 512 to poor gas is fed through the hole 517 for gas in the chamber 530 combustion. Compressed ambient air 521 is fed under pressure into the chamber 525 for heat and pressure equalization, where, as described above, compressed air 521 removes some of the heat from the camera 512 for the poor gas and the camera 530 combustion. The compressed air exits from the chamber 525 for heat and pressure equalization via the 555 output and fed into the heat exchanger (not shown). Preheated air from the heat exchanger is fed through line 565 in the chamber 526 for preheated air, where preheated air is supplied through the hole 527 for air in chamber 530 combustion. Luggage 526 for preheated air insulated to retain heat and minimize pressure drops. Luggage 526 for preheated air forms an intermediate chamber for heated air, which is placed inside the chamber 525 to heat and pressure, and is cooled by it.

In each of construction the x examples of execution in figure 4-12 ordinary specialist in the art will easily understand, although it is not shown that the corresponding number of auxiliary burners 16 (shown in figure 1) may provide or as the engine starts for the initial heating of the gases in the combustion zone to the desired temperature of ignition, and/or to maintain combustion in the case of work in different types of composition or level of heat of the fuel mixtures.

In a constructive examples of execution, shown in figure 4 and 5, the heat for preheated air is supplied from the device 400/500 for burning. Figure 6 shows another embodiment of the present invention, in which the heat for preheated air is supplied from the auxiliary heat source.

Figure 6 shows a device 600 for combustion in accordance with another design of the present invention. The device 600 for burning includes camera 612 for the poor gas chamber 630 combustion section 640 heat recovery and release 650. Poor gas 610 is fed through line 611 in the chamber 612 for the poor gas. Ambient air is compressed and supplied air pump 620 through a pipeline 621 feed into the chamber 625 for heat and pressure equalization. Hence the heated air exits through line 674 and is heated by a source 675 heat to be preheated air in the pipeline 676 d the I combustion chamber 630 combustion. Source 675 heat can be any suitable heat source, such as, for example, is supplied with steam or electricity, for example, from an external source to keep warm and to develop more recovered heat.

7 shows another embodiment of a device 700 for combustion in accordance with the present invention. The device 700 for burning includes camera 712 for the poor gas chamber 730 combustion section 740 heat recovery and production of 750. Poor gas 710 is supplied via a pipeline 711 feed into the chamber 712 to poor gas. In this design there are two separate pipe for air supply. Ambient air is compressed and supplied air pump 720 through line 721 submission to the camera 725 for heat and pressure equalization. The heated air exits through line 777. The controller 778 pressure is provided for regulating the pressure in the chamber 725 for heat and pressure equalization. The heated air in this design eventually exits through line 779 in the atmosphere. However, air pump 770 delivers the compressed ambient air through line 772 in the auxiliary heat source 775. Pre-heated air in the pipeline 776 then fed into the combustion chamber 730.

On Fig shows a traditional setting, in which the Oh two devices 800 and 801 for burning work in parallel. The device 800 for burning includes camera 812 for the poor gas chamber 830 combustion section 840 heat recovery and production of 850. Poor gas 810 is fed through the pipe 811 feed into the chamber 812 for the poor gas. The device 801 for burning includes camera 832 combustion and release 852. Fuel 814 is supplied through line 815 in the chamber 832 combustion device 801 for burning. The surrounding air is supplied from air pump 820 in both devices 800 and 801 for burning. Air pump 820 delivers compressed air through the pipe 821, which branches into pipes 822 and 823 submission. The pipeline 822 supply supplies air for combustion into the chamber 830 combustion device 800 for combustion, while the pipeline 823 supply supplies air for combustion into the chamber 832 combustion device 801 for burning.

Figure 9 shows another conventional installation of the device 900 and 901 for burning operating in parallel. In this design, the device 901 for combustion is set for heat recovery for preheating air for the device.

The device 900 for burning includes camera 912 for the poor gas chamber 930 combustion, plot 940 heat recovery and production of 950. Poor gas 910 is supplied via a pipeline 911 feed into the chamber 912 for the poor gas. The device 901 for burning includes camera 932 combustion, the heat exchanger 92 and release 952. The 914 fuel is supplied via a pipeline 915 feed into the chamber 932 combustion. Compressed ambient air is supplied from air pump 920 through line 921 feed, which is divided into pipelines 922 and 923 feed. The pipeline 922 supply supplies air for combustion into the chamber 930 combustion, while the pipeline 923 feeder feeds air into the heat exchanger 962. Heat transfer occurs in the heat exchanger 962 to create preheated air 965 for combustion in the chamber 932 combustion.

Figure 10 shows another embodiment of the present invention, which relates to the two devices 1000 and 1001 for burning. The device 1000 for burning includes camera 1012 for the poor gas chamber 1030 combustion section 1040 of the regeneration heat exchanger 1060 and the release of 1050. Poor gas 1010 is supplied via a pipeline 1011 feed into the chamber 1012 for the poor gas. The device 1001 for burning includes camera 1032 combustion and release 1052. Fuel 1014 is supplied via a pipeline 1015 feed device for burning 1001 for combustion in the chamber 1032 combustion. Air pump 1020 delivers the compressed ambient air through line 1021, which is divided into pipelines 1022 and 1023 filing. The pipeline 1023 filing supplies ambient air into the chamber 1032 combustion. The pipeline 1022 feeder feeds air into the chamber 1025 for heat and pressure equalization. Laid is as heated air exits from the chamber 1025 for heat and pressure equalization via a pipeline 1055 and forwarded to the heat exchanger 1060. Pre-heated air leaves the heat exchanger 1060 in the pipeline 1065 and is fed into the chamber 1030 combustion.

Figure 11 shows the installation in which two devices 1100 and 1101 for burning work in parallel. The device 1100 for burning includes camera 1112 for the poor gas chamber 1130 combustion section 1140 of the regeneration heat exchanger 1160 and release 1150. Poor gas 1110 is supplied via a pipeline 1111 feed into the chamber 1112 for the poor gas. Device 1101 for burning includes camera 1132 combustion and the release of 1152. Fuel 1114 is fed through line 1115 in the camera 1132 combustion.

Air pump 1120 delivers the compressed ambient air through line 1121 in the camera 1125 heat and pressure equalization. Slightly heated air comes out of the camera 1125 heat and pressure through line 1155 and is directed into the heat exchanger 1160. The heat exchanger 1160 provides preheated air for pipelines 1165 and 1166. Pre-heated air in the pipeline 1165 sent to the camera 1130 combustion. Pre-heated air in the pipeline 1166 sent to the camera 1132 combustion.

On Fig shows another embodiment of the present invention, which uses two devices 1200 and 1201 for burning operating in parallel. The device 1200 for burning included the t chamber 1212 for the poor gas the camera 1230 combustion section 1240 heat recovery and release 1250. Device 1201 for burning includes camera 1232 combustion, the heat exchanger 1262 and release 1252. Fuel 1214 device 1201 for combustion is supplied via a pipeline 1215 feed into the chamber 1232 combustion.

Poor gas 1210 for combustion in the device 1200 for combustion is supplied through line 1211 in the chamber 1212 for the poor gas. Air pump 1220 delivers the compressed ambient air through line 1221 submission to the camera 1225 for heat and pressure equalization. Slightly heated air from the chamber 1225 heat and pressure is directed through line 1255 in the heat exchanger 1262 device 1201 for burning. Pre-heated air in the pipeline 1280 leaves the heat exchanger 1262. This preheated air is supplied by pipeline 1281 feed into the chamber 1230 combustion device 1200 for burning and pipeline 1282 feed into the chamber 1232 combustion device 1201 for combustion, respectively.

Except as described here otherwise the various components shown in outline or in the shape of a square on the figures, individually well known and their internal construction and operation are not critical either to the making or using of this invention or to a description of the best mode of carrying out the invention.

In vremja the present invention has been described with what is considered at present the preferred design examples of execution, you must understand that the invention is not limited to the examples described here. On the contrary, the invention is intended to protect various modifications and equivalent devices in the nature and scope of the attached claims. The volume of the following items must comply with the broadest interpretation to encompass all such modifications and equivalent structures and functions.

INDUSTRIAL APPLICATION

Installation for combustion under pressure above atmospheric and the way it works, described herein, can be used for combustion of fuel gas at low concentrations. The installation includes a device for burning under greater than atmospheric pressure combustible gas at low concentrations - poor gas, having the camera for the poor gas, a combustor, a heat recovery area and release the pipe feeding the poor gas for the supply of the poor gas into the chamber for the poor gas chamber for heat dissipation and pressure equalization and Luggage for preheated air within combustion appliances, piping compressed ambient air to the compressed ambient air into the chamber to heat and pressure, the pipeline is filing preheated air for supplying preheated air into the chamber preheated air the hole for the poor gas for the supply of the poor gas from the chamber for the poor gas in the combustion chamber; an outlet for preheated air for supplying preheated air from the chamber for preheated air into the combustion chamber. In the chamber to heat and pressure equalization occurs, the heat transfer from the camera to the poor gas chambers for preheated air and the combustion chamber to the compressed ambient air in the chamber to heat and pressure equalization. Poor gas and preheated air are burned in the combustion chamber under greater than atmospheric pressure.

1. Installation for combustion under pressure above atmospheric combustible gas with low concentrations of poor gas containing

device for combustion under pressure above atmospheric, comprising a camera for the poor gas, a combustor, a heat recovery area and production;

the pipe feeding the poor gas for the supply of the poor gas into the chamber for the poor gas;

chamber to heat and pressure equalization and Luggage for preheated air within combustion appliances;

the supply line of compressed ambient air to the compressed ambient air into the chamber to heat and pressure equalization;

drobopro the d supply preheated air to supply preheated air into the chamber preheated air;

the hole for the poor gas for the supply of the poor gas from the chamber for the poor gas in the combustion chamber and

the hole for preheated air for supplying preheated air from the chamber for preheated air into the combustion chamber,

in which the chamber for removal of heat and pressure equalization performed by the heat transfer from the camera to the poor gas chambers for preheated air and the combustion chamber to the compressed ambient air in the chamber to heat and pressure, and poor gas and preheated air are burned in the combustion chamber under greater than atmospheric pressure.

2. Installation according to claim 1, in which the camera for preheated air is built into the camera to heat and pressure.

3. Installation according to claim 1, additionally containing an air pump for compressing ambient air to a pressure of from about 0.1 to about 10.0 g psig.

4. Installation according to claim 3, in which the ambient air is compressed to a pressure from about 0.1 to about 5,0 psig.

5. Installation according to claim 1, additionally containing a heater to pre-heat the pre-heated air to a temperature of from about 200 to about 1000°F.

6. Installation according to claim 5, in which preheated in such pre-heated to a temperature of from about 200 to about 1000° F.

7. Installation according to claim 1, in which in the chamber to heat and pressure equalization of the temperature of the compressed ambient air coming from the chamber to heat and pressure, is increased to a temperature of not more than about 500°F.

8. Installation according to claim 1, in which in the chamber to heat and pressure equalization of the temperature of the compressed ambient air coming from the chamber to heat and pressure, is increased to a temperature of not more than about 300°F.

9. Installation according to claim 1, further comprising a heat exchanger within the heat recovery device for combustion to preheat the preheated air.

10. Installation according to claim 9, additionally containing the output of the compressed ambient air from the chamber to heat and pressure and flow for the supply of the released air into the heat exchanger.

11. Installation according to claim 1, additionally containing a heat source external to the device for combustion to preheat the preheated air.

12. Installation according to claim 11, additionally containing the output of the compressed ambient air from the chamber to heat and pressure and flow for the supply of the released air to an external source of heat.



 

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2 cl, 1 dwg

FIELD: the invention refers to apparatus of regenerative thermal oxidation with multi pass valves.

SUBSTANCE: the apparatus for regenerative thermal oxidation for gas processing has a combustion zone, the first heat exchanging layer keeping heat exchanging surroundings and connecting with the combustion zone; the second heat exchanging layer keeping heat exchanging surroundings and connecting with the combustion zone; a valve for alternate direction of the gas flow between the first and the second heat exchanging layers. At that the valve has the first valve passage and the second valve passage separated from the first valve passage; a flow distributor having an admission passage communicates with the help of fluid medium with the admission opening of the surroundings and an exhaust passage communicates with the help of fluid medium with exhaust opening of fluid surroundings. At that the distributor is fulfilled with possibilities of its the first and the second valve passages between the first position in which the first valve passage communicates with the help of liquid with the admission passage and the second valve passage communicates with the help of liquid surroundings with exhaust passage and the second position in which the indicated the first valve passage communicates with the help of the fluid surrounding with exhaust passage and the second passage of the entry of the valve with the help of liquid surroundings communicates with the admission passage. At that the distributor of flow has a blocking surface which blocks the flow through the first part of the first valve passage and through the second part of the second valve passage when the distributor of the flow is between the first and the second positions and is fulfilled with possibility of its turning to 180o between the first and thesecond positions. At that valve passage is divided as the first so is the second at least into two chambers and the first and the second parts of the valve passages are congruous.

EFFECT: simplifies the construction, provides comfort of controlling and exploitation and deep removal of volatile organic combinations.

22 cl, 12 dwg

FIELD: technologies for combustion of flush gases, including those under high pressure, during extraction and processing of natural gas and oil.

SUBSTANCE: body of burner, mounted on gas inlet pipe, is made conical with widened portion at upper portion, in the body additionally mounted are two catalyst elements, at lower portion on inlet section first catalyst element is positioned, and above on outlet section - second catalyst element, rotary shutters are mounted on base of conical body in additional way, so that in closed position they are in contact with first catalyst element, and open position between first catalyst element and body gap is formed, also, device is additionally provided with one or more main torches, mounted in gas inlet pipeline below rotary shutters and first catalyst element. Relation of diameters of first and second catalyst elements matches relation of debits of hydrocarbon gas, fed in normal mode and during salvo exhaust. Catalyst elements are manufactured either in form of cell-like structured blocks with direction of channels in parallel to direction of feeding of flush gases, or in form of block sections with granulated catalyst, for example, Rachig rings, or in forms of block sections with active-catalyst metallic shavings, or in form of blocks with active-catalyst metallic meshes.

EFFECT: higher ecological safety and fullness of combustion of flush gases in broad flow range, simplified construction and comfort of maintenance.

6 cl, 3 dwg

FIELD: the invention refers to industrial ecology and may be used for flameless purification of ejections of industrial enterprises.

SUBSTANCE: the reactor for catalytic purification of gaseous ejections has a cylindrical body, which interior surface is covered with a catalyst with a source of infrared radiation placed in the body, a tube heat exchanger located in the lower part of the body, a turbine mixer located in the upper part of the body and additionally - a permeable cylindrical drum out of the catalyst so that the axles of the symmetry of the drum and body coincide. The drum embraces the mixer and the source of infrared radiation fulfilled in the shape of a six-ends star is installed in the middle of the body so that its flatness is perpendicular to the axle of the symmetry of the reactor. The drawing off socket is connected with the tube space of the heat exchanger, and the feeding socket is located so as to provide heating of gaseous ejections with the heat of the gases moving out of the reactor.

EFFECT: increases effectiveness of purification of gaseous flow and reduces power inputs for heating the gas flow.

1 dwg

FIELD: burning combustible gas at pressure above atmospheric.

SUBSTANCE: proposed plant is used for burning lean gases; it consists of unit for burning gas at pressure above atmospheric including lean gas chamber, combustion chamber, heat regeneration section and exhaust; pipe line supplying lean gas to lean gas chamber; heat removal and pressure equalizing chamber and preheated air chamber; plant is also provided with pipe line supplying the compressed surrounding air to heat removal and pressure equalizing chamber, preheated air pipe line for delivery of preheated air to preheated air chamber; provision is made for hole for delivery of lean gas from lean gas chamber to combustion chamber and hole for delivery of preheated air from preheated air chamber to combustion chamber. Heat removal and pressure equalizing chamber is made for heat exchange between lean gas chamber, preheated air chamber and combustion chamber and compressed surrounding air; lean gas and preheated air are burnt in combustion pressure at pressure above atmospheric.

EFFECT: enhanced efficiency; minimum difference in pressure between gas and air chambers.

12 cl, 12 dwg

Head of torch plant // 2285863

FIELD: arrangements or devices for treating smoke or fumes.

SUBSTANCE: head comprises gas supply pipe with gas gate and protecting shield mounted outside and coaxially at the top end of the gas supply pipe. The protecting shield is composed of two baffles made of two hollow trancated cones mounted one on the other. The grater base of the top baffle faces downward, and that of the bottom baffle faces upward. The smaller base is connected with the gas supply pipe.

EFFECT: enhanced reliability and prolonged service life.

2 cl, 2 dwg

FIELD: power engineering.

SUBSTANCE: valve comprises rotatable housing provided with passage, outer unmovable ring seal of the housing, ring seal between the rotatable housing and outer unmovable ring seal of the housing that has bore made for permitting gas to flow to the passage or from the passage. The ring seal is movable with respect to the outer ring seal of the housing. The passage and the bore are made for permitting receiving the compressed gas to provide continuous sealing between the outer ring seal of the housing and ring seal when the housing rotates. The valve is additionally provided with means for permitting gas to flow through the radial passage and between the ring seal and outer unmovable ring seal of the housing and setting ring connected with the rotatable housing and locking ring that is mounted at a distance from the setting ring and connected with the rotatable housing. The ring seal is interposed between the setting ring and locking ring.

EFFECT: simplified structure and enhanced efficiency.

16 cl, 30 dwg

FIELD: toxic flue gas combustion technology for fuel-burning units.

SUBSTANCE: flue gases are neutralized in combustion chamber; total fuel flow is bifurcated; first fuel flow is mixed up with flue gases supplied to combustion chamber and second one is conveyed to combustion-chamber burners wherein it is burned in air environment and then passed to combustion chamber. Coke gas, flue gas, or blast-furnace gas, or generator gases, or mixture thereof can be used as fuel; total flowrate of flue gases (B"G) at combustion chamber outlet, total flowrate of fuel (BF) supplied to combustion chamber, flowrate of air (BA) supplied to combustion chamber, and flowrate of fuel (BFBRN) supplied to burners are found from following set of equations (1), (2), (3), (4):

, where B'G is flowrate of flue gases from combustion chamber outlet, kg/h; T'G is temperature of flue gases at combustion chamber inlet, °C; O'2 is oxygen content in flue gases at combustion chamber inlet, %; C'G is heat capacity of flue gases at combustion chamber inlet, kcal/kg; B"G is total flowrate of flue gases at combustion chamber outlet, kg/h; BF is total flowrate of fuel supplied to combustion chamber, kg/h; BFBRN is fuel flowrate to burners, kg/h; QFL is fuel low heating value as fired, kcal/kg; O2" is oxygen content in flue gases at combustion chamber outlet, %; VAO is theoretical air flowrate for burning 1 kg of fuel, kg/h; BA is air flowrate to combustion chamber, kg/h; TG" is gas temperature at combustion chamber outlet, °C; CG" is heat capacity of flue gases at combustion chamber outlet, kcal/kg; α is excess air coefficient. Temperature within combustion chamber is maintained between 850 and 1150 °C.

EFFECT: enhanced efficiency of flue gas neutralization in fuel-burning units.

1 cl, 1 dwg, 3 tbl, 1 ex

FIELD: chemical engineering.

SUBSTANCE: method comprises using gas made of a mixture of carbon dioxide and oxygen in the plasma burner. The plasma burner ionizes gas thus producing carbon monoxide and reactive oxygen that removes ash from the gas. Oxygen and vapor are sprayed and injected to chamber (3) that receives the device with plasma burner. The control system (6) is provided with feedback and controls the concentration of the production gas, nozzle, and plasma burner.

EFFECT: enhanced reliability.

29 cl, 3 dwg

FIELD: the invention is designed for ventilation and may be used at equipping industrial objects.

SUBSTANCE: the system of ventilation of an industrial object has local units of suction air with polluting substances, an airway connecting the local suction units with the suction branch pipe of a boiler's blow fan. The airway is connected through drainage with the pipeline located below it with condensed and liquid fractions of polluting substances. The pipeline is switched to the suction branch pipe of the boiler's blow fan.

EFFECT: increases reliability, economy of the ventilation system of an industrial object.

3 cl, 1 dwg

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