Gas burner unit

 

(57) Abstract:

The invention relates to a power system, in particular to the use of natural gas as a source of thermal energy. The technical result of the invention is to obtain at the outlet of the burner pulsating flow of the gas mixture. This technical result is due to the fact that gas-burning unit containing gas burner housing and pipelines for the supply of air and natural gas, is supplied connected with a source of pressure or vacuum pulsator and two filled with liquid and connected to a bottom of the tank and the burner is equipped located along the gas after the point of its introduction into the air stream by the device for selection and reverse feed gas mixture with transporting it by pipeline, with the upper portion of one container is connected with the pulsator, and the upper part of the other with the discharge piping. 1 Il.

The present invention relates to a power system, in particular to the use of natural gas as a source of thermal energy.

Known gas-burning unit that contains the main burner, the gas supply to the gas, fan for neirogennogo gas in industrial facilities. The Handbook. - M.: Energoatomizdat, 1992, pp. 50-51). The lack of gas burner unit of this type is in a stable flow of the combustible mixture, which has the consequence of further her uniform combustion in the furnace.

Closest to the present invention is a gas burner unit comprising a burner housing, a pipe for supplying a gas, a fan with a duct to blow air into the burner and shield of automatic control (see the above source, page 51-52). The main disadvantage of gas burner unit of this type is in a stable flow of the combustible mixture.

The following should be noted. In the above structures, gas-burning units used gas burner with forced air supply. Such burners are high-quality education of the gas mixture, i.e., sufficiently good characteristics of the mixing device. The proposed solution, however, can be realized when using gas burners injection type, in which the air required for combustion air at the expense of the kinetic energy of the jet of natural gas flowing from the nozzle.

Those who twostorey mixture, which in turn leads to an increase in the intensity of the heat transfer processes in heat generating apparatus using the heat of combustion of natural gas (steam boiler, gas-air heat exchanger and so on).

This technical result is due to the fact that gas-burning unit containing gas burner housing and pipelines for the supply of air and natural gas, is supplied connected with a source of pressure or vacuum pulsator and two filled with liquid and connected to a bottom of the tank and the burner is equipped located along the gas after the point of its introduction into the air stream by the device for selection and reverse feed gas mixture with transporting it by pipeline, with the upper portion of one container is connected with the pulsator, and the upper part of the other with the discharge pipe.

The invention consists in the following.

The use of pulses in carrying out various processes are known. However, the pulsed mode of the feed gas mixture to a combustion valid under certain conditions, chief among which is the constant composition of the gas mixture with a specified horse pulsation of the gas and air flow, i.e., equal changing their consumption, which greatly complicate the design of the burner and the automatic control system. When using injection burners pulsating flow of natural gas cannot be selected and, of course, immutable during the construction of the burner to provide a constant ratio between the quantity of gas supplied and the amount of drawn air. The proposed solution ensures the stability of the composition of the gas mixture while simultaneously pulsing mode of its presentation in the gas apparatus. The change of the flow time can be of different nature. To achieve a technical result, it is sufficient to select the part of the flow finished of the gas mixture, i.e., after the process of mixing natural gas and air, and then return the selected part of the back.

Two are filled with liquid and connected to a bottom tanks are simply communicating vessels. The obvious opportunity for containers, with one common wall (see below described constructive solution) does not change the facts. The impact on one of the containers of the pressure source or vacuum proizvol function of the piston in the piston pump. Bearing diverse pulsating effect of the pressure source or vacuum form through the use of pulsators different types (see S. M. Karpachova, B. E. grouse. Pulsation equipment in chemical technology. - M.: Chemistry, 1983, page 14-23).

Schematically, the design of the gas burner unit of the present invention shown in the drawing.

Gas burner unit contains a gas burner 1 having a housing 2. In this embodiment used the burner with forced air supply. The burner 1 is connected with the inlet gas pipe 3 and the inlet air pipe 4. In case the burner is installed swirl 5. The burner housing 2 provided with a device for sampling and reverse the supply of the combustible mixture 6 with transfer tube 7. Device for selection of the combustible mixture 6 in this embodiment is made in the form located on the frame 2 ring hollow tide, in which case 2 is provided with perforations. Device for selection of the combustible mixture located along the gas after the swirler 5, i.e. after the point of introduction of natural gas into the air stream. Gas burner unit is also equipped with two tanks 8 and 9. In the lower part of the vessel 8 and 9 are connected between the om 10. In this embodiment shows a pneumatic pulsator, representing spool-distribution mechanism. The pulsator 10 has a body 11, a valve 12 with a hole (slot) 13, a feed pipe 14 and the exhaust tube 15. The spool 12 is placed on the rotating shaft 16. The tank 8 is connected through a transporting pipe 7 with a device for sampling and reverse the supply of the combustible mixture 6. The pulsator 10 is connected through a feed pipe 14 with a source of pressure or vacuum (not shown).

Gas-burning unit operates as follows.

In the burner 1 via line 4 serves required for combustion air. On line 3 simultaneously serves combusted natural gas. By means of devices known type cost of air and natural gas stable. Gas-air mixture of high quality, provided by intensive mixing of the flows receive after passing the flow of gas and air swirler 5. The pulsator 10 is connected with a source of vacuum through pipe 14. When the rotation is accommodated in the housing 11 of pulsator 10 of the shaft 16 and the rotation of the setting shaft 16 of the spool 12 of the disc type having a hole (slot) 13. When combining the FEA is carried out, as the liquid column in the vessel 8 is lowered. When lowering of the liquid column is the selection of final gas mixture from the burner housing through the device for selection of the combustible mixture 6. The gas mixture through the perforations in the casing 2 of the burner 1 is supplied into the cavity ring tide device 6 and further along the conveying pipe 7 into the container 8. When combining holes (slits) 13 of the valve 12 with the exhaust pipe 15 connected with the surrounding space, the container 9 is again under atmospheric pressure. Is the lowering of the liquid column in the tank 9 and, respectively, the rise of the liquid column in the vessel 8. The gas mixture from the vessel through the transport pipe 7 and the device 6 that performs at this time, the function of the device to reverse the supply of the combustible mixture enters the burner 1. Then the cycle repeats. Thus, when a stable air-fuel mixture is throbbing its submission to burning.

Description of construction of a gas-burning unit and its work should make the following observations. Device for sampling and reverse feed gas mixture may be performed in various ways until the introduction of simple burner housing pipe. Characteristic types).

In the above example, as mentioned previously, used pneumatic pulsator with spool-distributing mechanism. With proper selection of the size and shape of the slots in the spool ripple can be sinusoidal or sawtooth character. The frequency of the pulses depends on the number of revolutions of the spool.

It is advisable to give an example of the operation of the gas burner unit for explaining held in this case processes. At a thermal power boiler, for example, 1.2 MW for combustion flows of 120.7 nm3/h natural gas medium composition. When the air excess factor =1,035 formed 1308 nm3per hour (363 liters per second) of the gas mixture supplied to the combustion. Put that design and the number of revolutions of the spool provides a uniform selection of 40 liters of a gas mixture within 0.8 seconds and reverse the flow in the burner for 0.2 C. Therefore, in the course of 0.8 with an average flow rate of the gas mixture into the combustion is (363 - 40/0,8)= 313 l/s (1127 nm3/hour). In the subsequent 0.2 with the flow of the gas mixture for combustion in average (363 +40/0,2)=563 l/s (2027 nm3/hour). Obvious pulsating nature of the burning torch. When choosing different shapes and sizes of the slots of the coil may naptime with turbulization of the flow of flue gases in the volume of the gas space of the boiler. According to preliminary experiments, there was an increase of the coefficient of heat transfer from flue gas to the heat transfer surfaces of the boiler by 15-20%.

Thus, the main technical and economic effect of the use of this technical solution is to increase the intensity of work of the gas apparatus.

Gas burner unit containing gas burner housing and pipelines for the supply of air and natural gas, characterized in that the block has associated with the source of pressure or vacuum pulsator and two filled with liquid and connected to a bottom of the tank and the burner is equipped located along the gas after the point of its introduction into the air stream by the device for selection and reverse feed gas mixture with transporting it by pipeline, with the upper portion of one container is connected with the pulsator, and the upper part of the other with the conveying pipeline.

 

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