The collector heat exchanger

 

(57) Abstract:

Usage: in a power system, in particular in the steam generators. The inventive reduction of the collector effect with a high degree of reliability is ensured by the fact that the collector comprises a cylindrical housing 1, capped at one end and having a nozzle 2 with the other, and perforated bypass pipe 5, open at both ends and coaxially mounted inside the housing 1. What's new is that both ends of the overflow pipe 5 is arranged with a gap 7 to the walls of the housing 1, and a perforation in it is made of the area by increasing its length from the inlet 2 to the plugged end of the housing 1. 3 Il.

The invention relates to a power system and can be used in steam generators.

Known output stage superheater, which contains the output manifold with end-steaming and shunt tubing connecting the hollow end of the manifold outlet end [1] Implementation of shunt tubing thus reduces the reliability of the entire output stage of the superheater due to the presence in the circuit thermostress elements, such as ground connections.

The closest of tehnicheskie overflow pipe with a perforated portion and a discharge pipe [2] Implementation of the collecting site in this way is not reliable since the bypass pipe connected to the manifold, and the body of the manifold are heated unevenly over time in transient modes of operation of the boiler, which causes cyclic alternating stresses in the metal and leads to the destruction of metal and welding at the junction of the overflow pipe with the outlet pipe.

The proposed device is aimed at creating a collecting manifold of the heat exchanger, which ensures the reduction of the collector effect with a high degree of reliability.

The collector of the heat exchanger, mainly collecting, comprises a cylindrical housing, plugged on one side and having a nozzle with the other and perforated open at both ends and coaxially installed inside the pipe, and the area of perforation increases along the length of the pipe in the direction from the inlet to the muted end of the body.

In Fig. 1 shows a collecting reservoir, a longitudinal section; Fig.2 - section a-a of Fig.1; Fig.3 cross-section B-B in Fig.1.

Collecting manifold heat exchanger comprises a cylindrical housing 1 with end pipe outlet protection 2, the inlet pipe 3, muffled by the end face 4 and the bypass pipe 5, fixed rods 6 in corpsewood perforation uneven along the length of the pipe and changes gradually from the highest side plugged end 4 of the collector, to the lower side facing the end of the pipe outlet protection.

Collecting manifold of the heat exchanger operates as follows. Steam flows from the heat exchange tubes connected to the input sockets 3 in the cylindrical body 1. While along the body of the collector 1 occurs the pressure drop along the length of the so-called manifold effect, which is the higher, the less reliable the system works due to the uneven distribution environment through the pipes. The static pressure of the moving pair along the length of the collector is not the same, from the back end of the 4 it is greatest, and by the end of the pipe outlet protection 2 the lowest. The tubes of the heat exchanger 3, is connected to the collector side stub end 4, is less steam than through tubes connected to the manifold by the end of the outlet 2. To reduce the influence of the hydraulic effect and uniform distribution of steam in pipe package you need to install the bypass pipe 5. Pairs of tubes facing the stub end is directed to the open end of the overflow pipe 5 and flows from areas with high static pressure in a zone with a lower static pressure. Thus, equalized disposable differential pressure which becomes the bypass pipe 5 through the perforations 8, the more static pressure in the cross section of the collector, the greater the area of the perforation. This reduces the hydraulic resistance of the steam passage in the bypass pipe and increase the outflow of steam from the heat exchanger tubes located closer to the plugged end of the collector.

Thus, the distribution of steam across the tubular package is carried out uniformly, which leads to a decrease of the hydraulic razvedki, and this, in turn, to increase the reliability of the collecting manifold of the heat exchanger.

The collector of the heat exchanger, mainly collecting, containing cylindrical body, capped at one end and having a nipple with the other, and perforated bypass tube, open at both ends and coaxially mounted inside the housing, characterized in that both ends of the overflow pipe is located with a clearance to the walls of the casing and perforation in it is made of the area by increasing its length from the nozzle to the plugged end of the housing.

 

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FIELD: heat-exchange apparatus; liquid-to-liquid heat exchangers.

SUBSTANCE: collector chamber of shell-and-tube heat exchanger adjoining the tube sheet of tube bank includes partitions dividing it into supply and discharge compartments; they have U-shaped profile with strip located between its runs; it is made from elastic material; one end of strip is secured on tube sheet and second end is bent at 180 deg. on side of supply compartment.

EFFECT: enhanced operational reliability.

FIELD: heat-power engineering; heat exchangers with mixing of heat-transfer agent flows at different temperatures.

SUBSTANCE: circular partition is provided with circular V-shaped box smoothly perforated over perimeter and located above holes of heat-transfer agent inlet branch pipes; vertex of V-shaped box is rigidly connected with circular partition and end faces of box are tightly connected with inner surface of body and outer surface of casing.

EFFECT: reduced hydraulic resistance at simultaneous reduction of usage of metal.

5 cl, 4 dwg

FIELD: heat-power engineering; power engineering; chemical and oil industries.

SUBSTANCE: proposed chamber is provided with rods having section in form of rectangle; rods are mounted over entire perimeter of tube bank in parallel with tubes; vertices of adjacent faces directed towards each other form diffuser and contraction passages. Vertices of faces of adjacent rods directed towards each other may be rounded-off.

EFFECT: reduced hydraulic resistance and enhanced reliability.

2 cl, 3 dwg

FIELD: heat power engineering.

SUBSTANCE: the inventions are intended for heating water and-or steam and may be used in heat power engineering. The boiler plant contains a cylindrical boiler having one course of gases and an internal cylindrical shielded furnace chamber, an air heater, controlled circuits of heating of a heat carrier and fuels, one and more rows of heat exchange pipes, a ring-shaped cylindrical sectional header and a contact economizer. The finned heat exchange pipes are made U-shaped or coiled and form in the end part of the furnace chamber a radiation-convective beam. At that the gas-tightness of the furnace chamber may be ensured either by heat exchange diaphragms connecting the heat exchange pipes or by a heat exchange cylindrical surface. The heat exchange diaphragms, as well as the heat exchange cylindrical surface, which is sealing the furnace chamber and the convective part of the boiler, are spread to the frontal collector. On the collector there are outlet branch-pipes for withdrawal of the heat carrier, from which it is simultaneously possible to take the heat-carrier of several parameters. The boiler plant is countercurrent in respect to a temperature pressure of the furnace chamber and has one and more supporting devices. The back butt of the furnace chamber serves a part of a heating surface of the air-heater together with a branch-pipe of the outlet of the combustion products. The boiler and its heat-exchange pipes are made with in an series heating of the heat-carrier at the speed of its movement in the heat-exchange pipes of 2.15 m\s. The ring-shaped finned boiler header has sections, which are formed by partitions both blank and perforated, one and more frontal covers, one and more pipe plates, on which the heat-exchange pipes of the boiler are fixed. A part of the partitions is made flat and a part of the partitions is made as a ring or a part of a ring. The external finned frontal side of a collector is a part of the heating surface of the air heater. Inventions ensure increased efficiency of the boiler gross load and expansion of its functionalities.

EFFECT: the inventions ensure increased efficiency of the boiler gross load and expansion of its functionalities.

20 cl, 27 dwg

FIELD: heat exchange apparatus; chemical industry and power engineering.

SUBSTANCE: proposed manifold has body with distributor secured on it. Secured to non-magnetic body are magnetic coils; distributor consists of movable and rigidly secured screens made from magnetic material with porous medium placed in between them. Porous medium may be made from foamed plastic and at least 5 rows of elastic balls whose diameter exceeds pitch of screen; it may include at least four layers of ferrite particles at effective diameter equal to diameter of elastic balls.

EFFECT: possibility of performing control of flows in wide temperature range.

4 cl, 9 dwg

FIELD: power engineering, in particular, engineering of collectors for devices for utilization of gases exhausted by apparatuses primarily used for heating air by combustion products, coming from compressor of gas-turbine plant of gas flow apparatus at compressor stations of main gas pipelines.

SUBSTANCE: air injection or drainage collector of heat exchange block of heat-exchange apparatus like regenerative air heater is made in form of cylindrical ring with opening, in which additional pipe board is welded, while projection on end of pipe board of curvilinear portion of ring, forming an end of opening, is positioned within limits of thickness of pipe board, connection of ring to pipe board in plane of ring cross-section is made within angular range γ=28°-75°, and relation of projection area on aforementioned plane of curvilinear ring portion, forming an end of opening, to projection area on this plane of appropriate end of pipe board, is 0,048-0,172.

EFFECT: decreased mass of construction, high manufacturability of same, possibly lower laboriousness of manufacture, high durability of injection and drainage collector and reliability of its operation due to higher rigidity of construction.

5 cl, 4 dwg

FIELD: power engineering, in particular, heat exchange devices, primarily, air-based gas cooling apparatuses.

SUBSTANCE: device is made in form of reservoir working under pressure, including cylindrical body with end portions of two-side curvature, central branch pipe for connection to gas main and branch pipes for connecting to chambers for inlet or outlet of gas of heat-exchange sections of air gas cooling apparatus, while cylindrical body is made of technological sections, central one of which is made primarily in form of unified technological element with central branch pipe, and branch pipes for connection to chambers for inlet and outlet of gas of heat exchange sections of air gas cooling apparatus are mainly symmetrically positioned on both sides from central technological section and number of these branch pipes on each side ranges from 2 to 8, while the area of cross-section in light of central branch pipe is 0,7-1,0 of area of cross-section in light of cylindrical portion of body of collector fro injection or drainage of gas, and total area of cross section in light of branch pipes for connection to chamber for inlet or outlet of gas of each heat-exchange section of air-based gas cooling apparatus is 0,37-0,62 of area of cross-section in light of cylindrical portion of body of collector for injection or drainage of gas.

EFFECT: decreased metal cost of gas injection or drainage collector and higher manufacturability of its construction, and also decreased hydraulic losses in collector for injection or drainage of gas.

3 dwg, 7 cl

FIELD: power engineering, particularly gas cooling plant components.

SUBSTANCE: gas inlet or outlet chamber is made as a high-pressure tank and comprises side, upper, lower and end walls. Gas inlet or outlet chamber also comprises not less than two load-bearing partitions arranged between side walls and provided with through orifices. One chamber wall is made as tube plate with orifices defining grid structure and adapted to receive heat-exchanging tube ends. One chamber wall has orifices to receive pies to connect thereof with gas inlet or outlet manifold, which supplies gas to or discharges gas from the chamber. Orifices for connection pipe receiving, load-bearing partition orifices and tube plate orifices define communication system to connect gas air cooling plant with gas pipeline. The communication system has several stages with orifices formed so that orifice number at each stage successively changes in gas flow direction. For gas inlet chamber above number increases, for gas outlet chamber the number decreases.

EFFECT: possibility to equalize velocity field, reduced hydraulic hammer, which results in reduced power losses in pipeline conveying gas to be cooled and in increased thermal performance of air cooling plant as a whole or air cooling plant section, increased economy of plant production and operation.

3 dwg, 13 cl

FIELD: engineering of collectors for injection or drainage of gas for apparatuses for air-based gas cooling.

SUBSTANCE: device has bearing frame, on which not less than three cradle supports are mounted for supporting body of collector for injection or drainage of gas and for abutment of branch pipe connected thereto for connection to gas main, and no less than four portal supports for temporary technological holding by plane, rotation angle and position along collector for injection or drainage of gas of branch pipes with flanges for connection to chambers for inlet or outlet of gas of heat-exchange sections of air-based gas cooling apparatus adequately to position of contact surfaces of response flanges and mounting apertures in them in chamber for inlet or outlet of gas. At least two cradle supports are positioned with possible abutment of body of collector for injection or drainage of gas against them in accordance to suspension scheme, each one primarily between additional pair of portal supports, mounted below outmost and adjacent flanges of branch pipes for connection to chambers for inlet or outlet of gas. Each portal support is made with detachable beam, which is provided with device for temporary holding by plane and rotation angle of flange of appropriate branch pipe and for connection of it to body of collector for injection or drainage of gas in planned position.

EFFECT: simplified construction of building berth while providing for high precision of manufacturing of collector for drainage or injection of gas.

4 cl, 4 dwg

FIELD: heat and power engineering, namely tube walls of inlet or outlet chambers of apparatus for air cooling of gas or section of such apparatus.

SUBSTANCE: tube plate of chamber of gas inlet or gas outlet of heat exchange section of apparatus for air cooling of gas includes plate in the form of parallelepiped, mainly right-angled one. Said plate includes system of through openings for ends of heat exchange tubes of tube bundle. Said openings are arranged by rows along height of wall at pitch of their axes in row being in range (1.7 - 3.4) d; at pitch of rows along height of wall being in range (1.6 - 3.4)d where d - diameter of openings. Said openings are shifted in adjacent rows by value 0.35 -0.65 of pitch in row. Projection of surface area of wall carcass onto mean plane of tube wall exceeds by 4 - 12.5 times projection of total surface area of voids of wall on the same plane. Portion of continuous cross section is arranged along perimeter of tube wall for forming rigidity band of tube wall. Surface area of rigidity band consists 16.0 - 45.0% of tube wall surface area.

EFFECT: enhanced strength, lowered metal consumption of construction due to optimal parameters of tube wall.

10 cl, 3 dwg

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