Recuperative heat exchanger

FIELD: heat engineering devices.

SUBSTANCE: the recuperative heat exchanger has rigidly fastened tube plates with tubes installed in them in concentric circles, the tube cavities communicate with one another for supply of the heat-transfer agent, connections for supply and discharge of the heat-transfer agent by means of which the tube cavities are connected, the heat exchanger has intermediate tubes, the cavity of each tube communicates with the cavities of the two adjacent tubes by means of two branches, and the cavities of the delivery and discharge branches communicate with the cavities of the first and last tube of the formed tube coil, the interaxial distance between the last and first tubes in the adjacent concentric circles equals the interaxial distance of the branches, the length of the tubes installed in the adjacent concentric circles differs by the value equal or exceeding the size of the branches fastened on the tubes. Besides, pouring holes are made in the tube plates for communication of the cavities between the plates, the heat exchanger is provided with a perforated or cellular casing and lugs fastened on the plates, it is also provided with a perforated tube with a connection for discharge of the heated heat-transfer agent, it is installed in the holes heat-transfer agent, it is installed in the holes made in the center of the tube plates.

EFFECT: produced recuperative heat exchanger for heat-up of the liquid discharge zone in tanks with petroleum products.

4 cl, 4 dwg

 

The invention relates to thermal devices, and in particular to heat exchangers of the regenerative type.

Known recuperative heat exchanger for warming the dark oil in the tank, comprising a number of sections of the parallel established between the pipes, cavities are communicated with each other and with the cavities of the collector pipes for inlet and exhaust heat of the heat carrier /see model project vertical tank No. 704 - 1 - 107, album 5, equipment, Kiev, 1974, p.20/.

The lack of analogue should be attributed to its small heat output /total area of the walls of pipes equal 14-30 m2/. The area of the pipe wall of the heat exchanger sufficient to ensure the fluidity of crude oil in the cold season, but totally inadequate for cooking in the tank bituminous mixtures.

Also known regenerative heat exchanger, comprising a fixed tube with installed on concentric circles pipes, cavities are communicated with each other to supply a heating fluid, a pipe for supply and discharge of coolant and taps, which are connected through cavity tubes /see Reference exchangers, Moscow, Energoatomizdat, 1987, volume 2, C-313/.

The specified technical solution closest to the proposed the most General there is i.i.d. signs and is taken as a prototype.

The design of the prototype flow for heating, and the heated coolant and may not be applicable to heat the local area of production fluid from the reservoir.

The technical result of the invention - creation design of recuperative heat exchanger to heat the outlet area of the liquid in the tanks with oil.

The technical result is achieved by the regenerative heat exchanger, comprising a fixed tube with installed on concentric circles pipes, cavities are communicated with each other to supply a heating fluid, a pipe for supply and discharge of coolant and taps, which are connected through the hollow tubes according to the invention, the heat exchanger includes an intermediate pipe, and the cavity of each of them communicates with the cavities of two adjacent set of pipes through two outlets, and the cavity inlet and outlet nozzles communicated with the cavities of the first and last tubes formed by the coil, the distance between the first and last tubes in adjacent concentric circles equals the axle the distance of the elbows, and the length of pipes installed in adjacent concentric circles, differ from each other by an amount equal to or greater envelope attached to the pipe bends.

the moreover, in tube sheets with holes for communication between the zones on both sides of the grid.

In addition, the heat exchanger is equipped with a perforated casing with a fixed racks.

In addition, the heat exchanger is equipped with a perforated pipe with a pipe for removal of the heated coolant, installed in the Central holes formed in the tube sheets.

The invention is illustrated in the drawings, which depict:

- figure 1 - General view of the heat exchanger /longitudinal incision/;

- figure 2 - section a-a of figure 1;

- figure 3 - connection node of two adjacent set of pipes;

- figure 4 - scheme deployed in the plane of the heat exchanger tubes.

Recuperative heat exchanger contains a tube 1 /two or more/that have holes /not marked/, in one of the holes on the diameter D1installed pipe 2 pipe 3, passing through the wall 4 of the tank.

The other end of the pipe 2 by means of two branches 5, forming the double connected with connecting the installed pipe. After install all pipe diameter D1the last pipe in the same double connected with the first pipe 6, is installed on a circle with diameter D2/see arrow in figure 2/. After installation of the pipe diameter D2similarly set the pipe diameter D3. The last pipe 7 on the outer diameter has a nozzle 8 mounted in the tank wall. In the Central holes of the grids installed perforated pipe 9 pipe 10 output for the tank.

In tube sheets made also overflow openings 11, which provide a flow of fluid through the lattice. On the periphery of the grids has a mesh body 12, the protecting tube heat exchanger from sticking to them lumps, for example, bitumen.

The heat exchanger casing sacramen on the racks 13, mounted on the bottom 14 of the tank. Each batch of pipes installed in one concentric circle, is different in length from service pipes installed in adjacent concentric circles, the value of “N”that allows welding doubles to pipes with minimal difference in diameter of the adjacent circles, to get the minimum dimensions of the heat exchanger and the maximum temperature in the zone of release of fluid from the reservoir.

Does the proposed heat exchanger is as follows.

The heating fluid through the collector /not shown/ doda in the direction of the arrow In the pipe 3, and later in the first pipe 2 in a concentric circle D1. Then the fluid that bathes the inside wall of the pipe, laid on the second concentric circle D2and after passing through it and the third pack is the pipe on the circumference of the D 3through the last pipe heat exchanger 7 and the pipe 8 is returned to the collector, thus warming all walls of the heat exchanger tubes.

The heat from the pipe wall is transferred to the fluid which is placed in the heat exchanger. Heated to the desired temperature in the zone of release from the reservoir fluid through the pipe 9 and the pipe 10 is withdrawn from the tank.

In the case of use as a heating fluid vapor pipe 7 is placed at the bottom point of the circle D3and at the exit of the heat exchanger set the trap.

The proposed heat exchanger can be used for flowing a heated fluid, for which it is placed in a sealed housing with an inlet and outlet pipe.

1. Regenerative heat exchanger, comprising a fixed tube with installed on concentric circles pipes, cavities are communicated with each other for the supply of heating fluid, and connections for inlet and outlet of the coolant and the taps, which are connected through the hollow tubes, wherein the heat exchanger includes an intermediate pipe, and the cavity of each of them communicates with the cavities of two adjacent set of pipes through two outlets, and the cavity inlet and outlet pipe communicated with the cavities of the first and the last truboprovodov coil, distance between the last and first tubes in adjacent concentric circles is equal to the center distance of the elbows, and the length of pipes installed in adjacent concentric circles, differ from each other by an amount equal to or greater envelope attached to the pipe bends.

2. The heat exchanger according to claim 1, characterized in that tube sheets made of overflow holes for the message of voids between the bars.

3. The heat exchanger according to claim 1, characterized in that it is provided with a perforated or mesh casing and fixed to the grids columns.

4. The heat exchanger according to claim 1, characterized in that it is equipped with a perforated pipe with a pipe for removal of the heated coolant, installed in holes formed in the center of pipe arrays.



 

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FIELD: heat engineering devices.

SUBSTANCE: the recuperative heat exchanger has rigidly fastened tube plates with tubes installed in them in concentric circles, the tube cavities communicate with one another for supply of the heat-transfer agent, connections for supply and discharge of the heat-transfer agent by means of which the tube cavities are connected, the heat exchanger has intermediate tubes, the cavity of each tube communicates with the cavities of the two adjacent tubes by means of two branches, and the cavities of the delivery and discharge branches communicate with the cavities of the first and last tube of the formed tube coil, the interaxial distance between the last and first tubes in the adjacent concentric circles equals the interaxial distance of the branches, the length of the tubes installed in the adjacent concentric circles differs by the value equal or exceeding the size of the branches fastened on the tubes. Besides, pouring holes are made in the tube plates for communication of the cavities between the plates, the heat exchanger is provided with a perforated or cellular casing and lugs fastened on the plates, it is also provided with a perforated tube with a connection for discharge of the heated heat-transfer agent, it is installed in the holes heat-transfer agent, it is installed in the holes made in the center of the tube plates.

EFFECT: produced recuperative heat exchanger for heat-up of the liquid discharge zone in tanks with petroleum products.

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EFFECT: enhanced reliability due to minimum deformation of air flow.

2 dwg

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21 cl, 2 ex, 2 tbl

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SUBSTANCE: in heat-exchange block of regenerative air heater, preferably block-sectioned, bank of heat exchange pipes is made four-drive and multi-row and has heat exchange pipes, positioned primarily in horizontal rows with vertical and horizontal gaps between each other filled with distancing elements, while geometrical characteristics of heat-exchange pipes of bank are decided on dependently on coefficients, first one of which concerns relation of volume, filled with heat exchange pipes in block, to common inner volume of heat exchange block, and second coefficient - relation of length of inner surface of heat exchange pipe to area of surface heat exchange, while relation of total length of heat exchange pipes, enveloped in transverse direction, to total length of inner areas of all heat exchange pipes of bank is 0,78-0,92, relation of sum of lengths of portions of heat exchange pipes, enveloped in longitudinal direction, to total length of inner areas of all pipes of bank is 0,05-0,18, and relation of sum of lengths of bend portions to total length of inner areas of all pipes of bank is 0,01-0,03.

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