CN217274931U - Lithium bromide absorption type unit capable of automatically removing blockage - Google Patents

Abstract

The utility model discloses a lithium bromide absorption unit capable of automatically removing blockage, which belongs to the technical field of absorption units and comprises a generator, an absorber, a heat exchanger and a bypass pipe, wherein a concentrated solution heat exchange pipe and a dilute solution heat exchange pipe are arranged in the heat exchanger, the liquid inlet end and the liquid outlet end of the concentrated solution heat exchange pipe are respectively communicated with a concentrated solution liquid outlet box and the absorber of the generator, the liquid inlet end and the liquid outlet end of the dilute solution heat exchange pipe are respectively communicated with the absorber and a dilute solution heating cavity of the generator, the liquid inlet end and the liquid outlet end of the bypass pipe are respectively communicated with the concentrated solution liquid outlet box and the absorber, and the pipe orifice of the liquid inlet end of the bypass pipe is higher than the normal working liquid level of the liquid outlet of the concentrated solution liquid outlet box and the concentrated solution liquid outlet box; when the concentrated solution heat exchange tube is blocked, the liquid level in the concentrated solution liquid outlet box rises and flows into the absorber from the bypass tube, and after high-temperature liquid in the absorber flows into the dilute solution heat exchange tube, the concentrated solution heat exchange tube is heated, so that crystals are dissolved again to realize automatic blockage removal, and the problems of hysteresis and valve failure do not exist.

Description

Lithium bromide absorption type unit capable of automatically removing blockage

Technical Field

The utility model relates to an absorption formula unit technical field especially relates to a can automatic unblock lithium bromide absorption formula unit.

Background

The lithium bromide absorption type machine set is a double-effect device for refrigerating, heating or cold-warm using lithium bromide water solution, and is mainly formed from generator, condenser, evaporator, absorber, heat exchanger and circulating pump. Here exemplified by a refrigeration unit: when the lithium bromide water vapor generator works, under the heating of high-temperature steam, the water in the lithium bromide water solution in the generator can be continuously vaporized to form high-temperature water vapor; after the high-temperature steam enters the condenser, the cold energy of the cooling water in the condenser is absorbed and cooled and condensed into high-pressure low-temperature liquid water; liquid water is sent into the evaporator through the throttle valve, the liquid water can be rapidly expanded and vaporized again in the evaporator, and a large amount of heat of refrigerant water in the evaporator can be absorbed in the vaporization process, so that the purposes of cooling and refrigerating are achieved; in the process, the evaporation concentration of the water in the lithium bromide aqueous solution is gradually increased, the water needs to be introduced into the absorber to absorb the water for dilution, the low-temperature steam which absorbs the heat of the refrigerant water in the evaporator can be introduced into the absorber to be absorbed by the lithium bromide concentrated solution, and after the concentration of the lithium bromide concentrated solution is reduced, the lithium bromide concentrated solution is sent back to the generator by the circulating pump again to complete the whole circulation.

Because the temperature of the lithium bromide concentrated solution from the generator is high, the lithium bromide concentrated solution is directly introduced into the absorber and cannot absorb water vapor well, and therefore, a heat exchanger is required to exchange heat with the lithium bromide concentrated solution before the lithium bromide concentrated solution is introduced into the absorber. However, during heat exchange in the heat exchanger, as the temperature of the lithium bromide concentrated solution is gradually reduced, the solubility of the lithium bromide concentrated solution is also reduced, a large amount of crystals are separated out from the solution, and the heat exchanger is easily blocked. In order to solve the above problems, the invention patent with patent number "201610820044.8" and the patent name "an anti-crystallization treatment device and method for absorption water chilling and heating unit" discloses a heat exchanger unblocking method: a bypass pipeline is arranged on a concentrated liquid pipeline between the generator and the heat exchanger, the bypass pipeline is directly communicated with the absorber, and a dilute liquid pipeline of the absorber is communicated with the other heat exchange pipe of the heat exchanger. When a heat exchange tube in the heat exchanger is blocked, a bypass pipeline is opened, so that the lithium bromide concentrated solution is directly introduced into the absorber, then flows into the other heat exchange tube of the heat exchanger through a dilute liquid pipe of the absorber, and heats the blocked heat exchange tube in the heat exchanger, so that the temperature of the lithium bromide concentrated solution in the heat exchange tube is increased, crystals are dissolved again, and the pipeline is dredged. However, because the bypass pipe is controlled by the valve, the valve is difficult to open to dredge the pipeline at the first time due to human factors after crystallization blockage happens in many times, and then certain hysteresis is caused, and the problem that the valve cannot be opened easily occurs after long-term use is solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem, the utility model provides a can dissolve stifled lithium bromide absorption formula unit automatically, as long as concentrated solution heat exchange tube in the heat exchanger blocks up, the liquid level in the concentrated solution goes out the liquid tank will rise automatically and flow into the absorber from the bypass pipe, then during the rare solution heat exchange tube of flow-in heat exchanger in the absorber, can heat the concentrated solution of high temperature lithium bromide in the concentrated solution heat exchange tube, make the crystallization dissolve in the concentrated solution of high temperature lithium bromide, automatic stifled of dissolving has been realized, the stifled hysteresis quality of removing of having avoided bringing because of artificial factor, and the problem that stifled mode valve fragile malfunction is removed to the tradition.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a can dissolve stifled lithium bromide absorption formula unit automatically, including generator, absorber and heat exchanger, be equipped with thermal concentrated solution heat exchange tube, rare solution heat exchange tube of can interchange in the heat exchanger, the feed liquor end of concentrated solution heat exchange tube with go out the liquid end respectively with the concentrated solution of generator goes out the liquid box the absorber intercommunication, the feed liquor end of rare solution heat exchange tube with go out the liquid end respectively with the absorber the rare solution heating chamber intercommunication of generator, including feed liquor end with go out the liquid end respectively with concentrated solution goes out the liquid box the bypass pipe of absorber intercommunication, the mouth of pipe of bypass pipe feed liquor end is higher than the liquid outlet of concentrated solution goes out the liquid box and the liquid level that concentrated solution goes out the liquid box and normally works.

Preferably, the bypass pipe comprises a bypass heat exchange pipe section which is positioned inside the heat exchanger and close to the concentrated solution heat exchange pipe, and the bypass heat exchange pipe section is positioned between the liquid inlet end and the liquid outlet end of the bypass pipe.

Preferably, the bypass heat exchange tube section and the dilute solution heat exchange tube are respectively arranged on two sides of the concentrated solution heat exchange tube.

Preferably, the dilute solution heat exchange tube is spirally wound around the concentrated solution heat exchange tube.

Preferably, the pipe orifice of the inlet end of the bypass pipe is lower than the inlet of the concentrated solution outlet box.

Preferably, a pipe orifice of the bypass pipe liquid inlet end extends into the concentrated solution liquid outlet box from the bottom of the concentrated solution liquid outlet box, and the pipe orifice of the bypass pipe liquid inlet end is far away from the liquid inlet of the concentrated solution liquid outlet box.

Preferably, a liquid baffle plate is arranged between the pipe orifice of the liquid inlet end of the bypass pipe and the liquid inlet of the concentrated solution outlet box.

Preferably, a circulating pump is arranged between the liquid inlet end of the dilute solution heat exchange tube and the absorber.

Preferably, a liquid distributor is arranged in the absorber, and the liquid outlet end of the concentrated solution heat exchange tube is connected with the liquid distributor of the absorber.

Preferably, the liquid distributor is a shower distributor.

The utility model discloses for prior art gain following technological effect:

1. the utility model arranges a bypass pipeline between the concentrated solution outlet box and the absorber of the generator, and the orifice of the liquid inlet end of the bypass pipeline is higher than the liquid outlet of the concentrated solution outlet box and is not lower than the normal working liquid level in the concentrated solution outlet box; when the heat exchanger is blocked by crystallization, the liquid level in a concentrated solution outlet tank of the generator rises, high-temperature lithium bromide solution can be directly introduced into the absorber through the bypass pipe and form high-temperature lithium bromide diluent, and when the high-temperature lithium bromide diluent flows through the heat exchanger, the high-temperature lithium bromide concentrated solution in the heat exchanger can be heated and dissolved for crystallization again, so that the blockage is removed; and when the next blockage removal, the process is repeated, so that the automatic blockage removal is realized, manual operation is not needed, and the problems of hysteresis and valve failure do not exist.

2. The utility model discloses a part of pipeline section of well bypass pipe is located and forms bypass heat transfer pipe section in heat exchanger, is separating stifled in-process, except that the rare solution of high temperature lithium bromide in the rare solution heat exchange tube can heat for the concentrated solution heat exchange tube, the concentrated solution of high temperature lithium bromide in the bypass heat transfer pipe section also can heat for the concentrated solution heat exchange tube, realizes dual heating, improves heating rate and effect.

3. The utility model discloses the mouth of pipe of well bypass pipe feed liquor end is less than the inlet that concentrated solution goes out the liquid tank to when preventing that heat exchanger from blockking up, the liquid level of the concentrated solution of lithium bromide that concentrated solution goes out the liquid tank overflows the inlet, makes the concentrated solution of lithium bromide flow back to the weak solution heating intracavity of generator.

4. The utility model discloses be equipped with between the mouth of pipe of well bypass pipe feed liquor end and the inlet of concentrated solution play liquid case and keep off the liquid board, can block normal during operation, during the concentrated solution of lithium bromide splashes into the bypass pipe.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic structural diagram of an auto-unblocking lithium bromide absorption unit;

fig. 2 is a schematic structural diagram of another lithium bromide absorption type unit capable of automatically unblocking.

Description of reference numerals: 1. a generator; 2. a heat exchanger; 3. an absorber; 4. a bypass pipe; 5. a concentrated solution heat exchange pipe; 6. a dilute solution heat exchange pipe; 7. a concentrated solution outlet box; 8. a dilute solution heating chamber; 9. a liquid outlet; 10. a liquid inlet; 11. a bypass heat exchange tube section; 12. a liquid baffle; 13. a concentrated solution pipe; 14. dilute solution piping; 15. a circulation pump; 16. a liquid distributor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The embodiment provides a lithium bromide absorption type unit capable of automatically unblocking, as shown in fig. 1 to fig. 2, comprising a generator 1, a heat exchanger 2 and an absorber 3; wherein the generator 1 comprises a concentrated solution outlet box 7 and a dilute solution heating cavity 8; a concentrated solution heat exchange tube 5 and a dilute solution heat exchange tube 6 are arranged in the heat exchanger 2, and the concentrated solution heat exchange tube 5 and the dilute solution heat exchange tube 6 are used for exchanging heat mutually; the concentrated solution outlet box 7 is communicated with the liquid inlet end of the concentrated solution heat exchange tube 5 through a concentrated solution pipe 13, and the liquid outlet end of the concentrated solution heat exchange tube 5 is communicated with the absorber 3 through the concentrated solution pipe 13, so that the lithium bromide concentrated solution after moisture evaporation in the generator 1 is introduced into the absorber 3 through the heat exchanger 2; the dilute solution outlet of the absorber 3 is communicated with the liquid inlet end of the dilute solution heat exchange tube 6 through the dilute solution piping 14, the liquid outlet end of the dilute solution heat exchange tube 6 is communicated with the dilute solution heating cavity 8 through the dilute solution piping 14, so that the lithium bromide concentrated solution which is evaporated in the generator 1 is led back to the generator 1 through the heat exchanger 2, so that after the lithium bromide concentrated solution in the absorber 3 absorbs low-temperature water vapor and is diluted into the lithium bromide dilute solution, the lithium bromide dilute solution enters the heat exchanger 2 to cool the lithium bromide concentrated solution in the concentrated solution heat exchange tube 5, and is led back to the generator 1 to be heated to form high-temperature water vapor again, and the lithium bromide concentrated solution is subjected to next circulation. Be equipped with a bypass pipe 4 between concentrated solution goes out liquid case 7 and absorber 3, the feed liquor end and the concentrated solution of bypass pipe 4 go out liquid case 7 intercommunication, and the mouth of pipe of the feed liquor end of bypass pipe 4 is higher than the liquid outlet 9 of concentrated solution play liquid case 7, and the mouth of pipe of the feed liquor end of bypass pipe 4 is higher than the liquid level of concentrated solution in the liquid case 7 during normal work simultaneously.

When the generator works normally, the dilute solution heating cavity 8 in the generator 1 heats the lithium bromide dilute solution, the water vapor sequentially passes through a condenser and an evaporator in the lithium bromide absorption type unit for refrigeration, and then the formed low-temperature water vapor is led back to the absorber 3. The lithium bromide dilute solution in the dilute solution heating chamber 8 loses moisture to form a lithium bromide concentrated solution, and is delivered into the concentrated solution outlet tank 7 through the liquid inlet 10, the lithium bromide concentrated solution in the concentrated solution outlet tank 7 flows into the concentrated solution pipe 13 from the liquid outlet 9, then flows into the concentrated solution heat exchange pipe 5 through the concentrated solution pipe 13, is cooled by the dilute solution heat exchange pipe 6, flows into the absorber 3 through the concentrated solution pipe 13, absorbs low-temperature water vapor in the absorber 3 and then is diluted into a lithium bromide dilute solution, the lithium bromide dilute solution is delivered into the dilute solution heat exchange pipe 6 through the dilute solution pipe 14 of the absorber 3, and after absorbing heat of the lithium bromide concentrated solution in the heat concentrated solution heat exchange pipe 5, the lithium bromide dilute solution returns to the dilute solution heating chamber 8 of the absorber 3 to perform the next cycle.

When the concentrated solution heat exchange tube 5 in the heat exchanger 2 is blocked by crystallization, because the concentrated solution of lithium bromide in the blocked concentrated solution outlet box 7 can not be discharged, the liquid level gradually increases, when the liquid level of the concentrated solution of lithium bromide is higher than the pipe orifice of the liquid inlet end of the bypass tube 4, the concentrated solution of lithium bromide can be discharged through the bypass tube 4 and flows into the absorber 3, and diluted with water vapor, a high-temperature dilute solution of lithium bromide is formed, the high-temperature dilute solution of lithium bromide flows into the dilute solution heat exchange tube 6 in the heat exchanger 2 through the dilute solution pipe 14, and then heat is transferred to the concentrated solution heat exchange tube 5, so that the concentrated solution of lithium bromide in the concentrated solution heat exchange tube 5 is heated, and the separated crystals are dissolved in the solution again gradually until the blockage is completely removed, and the high-temperature dilute solution of lithium bromide in the dilute solution heat exchange tube 6 is cooled and introduced into the dilute solution heating cavity 8 of the generator 1 after heat exchange. When the inside of the concentrated solution heat exchange pipe 5 is completely unblocked, the concentrated solution heat exchange pipe 5 forms a passage again, the concentrated lithium bromide solution in the concentrated solution outlet box 7 flows out through the liquid outlet 9 and the bypass pipe 4 at the same time, and the liquid level of the concentrated lithium bromide solution begins to descend until the normal working liquid level is restored again. When the blockage is crystallized again, the process can be repeated to realize automatic blockage removal, compared with a manual control valve, the blockage removal can be carried out at the first time, and the blockage removal effect cannot be lost due to hysteresis caused by human factors and damage of the valve.

In the embodiment, as shown in fig. 1 to fig. 2, the liquid outlet end of the bypass pipe 4 extends into the absorber 3 from the bottom of the absorber 3, which is beneficial for the high-temperature lithium bromide dilute solution to flow from the absorber 3 to the heat exchanger 2 quickly, so that the solution temperature is higher and the blockage removal time is faster.

In addition to the way of arranging the bypass pipe 4 and the heat exchanger 2 as two independent structures as shown in fig. 1, and the way of arranging the bypass pipe 4 far away from the heat exchanger 2, in the embodiment, referring to fig. 2, a part between the liquid inlet end and the liquid outlet end of the bypass pipe 4 can be arranged inside the heat exchanger 2 to form a bypass heat exchange section 11, and the bypass heat exchange section 11 is close to the concentrated solution heat exchange pipe 5. When crystallization blockage occurs in the concentrated solution heat exchange tube 5, along with the rising of the liquid level in the concentrated solution liquid outlet box 7, high-temperature lithium bromide concentrated solution flows into the bypass tube 4, the bypass heat exchange tube section 11 on the bypass tube 4 can transfer heat to the concentrated solution heat exchange tube 5, and the temperature of the lithium bromide concentrated solution in the concentrated solution heat exchange tube 5 is raised together with the dilute solution heat exchange tube 6, so that the blockage removal effect is accelerated. It should be noted that, if the heat exchanger 2 employs plate heat exchange, the bypass pipe 4 cannot be disposed inside the heat exchanger 2, and the arrangement is similar to that in fig. 1.

Further, referring to fig. 2, the bypass heat exchange section 11 and the dilute solution heat exchange tube 6 are respectively disposed at two sides of the concentrated solution heat exchange tube 5, and heat is transferred to the dilute solution heat exchange tube 6 at two sides of the dilute solution heat exchange tube 6, so as to ensure that the lithium bromide concentrated solution in the concentrated solution heat exchange tube 5 is uniformly heated.

Of course, except for the arrangement mode that the bypass heat exchange tube section 11 and the dilute solution heat exchange tube 6 are respectively arranged at two sides of the concentrated solution heat exchange tube 5, in this embodiment, the dilute solution heat exchange tube 6 can also be spirally wound on the concentrated solution heat exchange tube 5 to improve the heat exchange area, ensure that the lithium bromide concentrated solution in the concentrated solution heat exchange tube 5 is uniformly heated, and improve the heating speed and the heating effect.

In this embodiment, as shown in fig. 1 to fig. 2, a pipe orifice at the liquid inlet end of the bypass pipe 4 is lower than the liquid inlet 10 of the concentrated solution outlet tank 7, so that the liquid level of the lithium bromide concentrated solution in the concentrated solution outlet tank 7 does not rise to the liquid inlet 10, and flows back to the dilute solution heating chamber 8 from the concentrated solution outlet tank 7.

In this embodiment, as shown in fig. 1 to fig. 2, the pipe orifice of the liquid inlet end of the bypass pipe 4 extends into the inside of the concentrated solution liquid outlet box 7 from the bottom of the concentrated solution liquid outlet box 7, and the pipe orifice of the liquid inlet end of the bypass pipe 4 is far away from the liquid inlet 10 of the concentrated solution liquid outlet box 7, so as to prevent the concentrated solution liquid outlet box 7 from entering the liquid inlet and sputtering into the bypass pipe 4.

In order to further avoid the situation that the concentrated solution liquid outlet box 7 is fed with liquid and splashes into the bypass pipe 4, in this embodiment, as shown in fig. 1 to fig. 2, a liquid baffle plate 12 is arranged between a pipe orifice of a liquid inlet end of the bypass pipe 4 and a liquid inlet 10 of the concentrated solution liquid outlet box 7. Preferably, the liquid baffle 12 can also block the liquid outlet 9 to prevent the lithium bromide concentrated solution from splashing into the liquid inlet 9 and the liquid outlet 9.

In this embodiment, as shown in fig. 1 to 2, a circulation pump 15 is provided on the dilute solution pipe 14 between the outlet end of the dilute solution heat exchange pipe 6 and the absorber 3.

In this embodiment, as shown in fig. 1 to fig. 2, a liquid distributor 16 is arranged in the absorber 3, the concentrated solution pipe 13 at the liquid outlet end of the concentrated solution heat exchange pipe 5 is connected to the liquid distributor 16, and the liquid distributor 16 can increase the contact area between the concentrated lithium bromide solution and the low-temperature water vapor, so that the concentrated lithium bromide solution can fully absorb the low-temperature water vapor, and the requirement of the dilution degree of the dilute lithium bromide solution can be met.

Further, in the present embodiment, as shown in fig. 1 to fig. 2, the liquid distributor 16 is a spray distributor, which can further increase the contact area between the lithium bromide concentrated solution and the low-temperature water vapor, and ensure the dilution effect.

The principle and the implementation mode of the utility model are explained by applying a specific embodiment, and the explanation of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims (10)

1. The utility model provides a can dissolve stifled lithium bromide absorption formula unit automatically, includes generator, absorber and heat exchanger, be equipped with thermal concentrated solution heat exchange tube, rare solution heat exchange tube each other in the heat exchanger, the feed liquor end of concentrated solution heat exchange tube with go out the liquid end respectively with the concentrated solution of generator goes out the liquid box the absorber intercommunication, the feed liquor end of rare solution heat exchange tube with go out the liquid end respectively with the absorber the dilute solution heating chamber intercommunication of generator, its characterized in that, including feed liquor end with go out the liquid end respectively with concentrated solution goes out the liquid box the bypass pipe of absorber intercommunication, the mouth of pipe of bypass pipe feed liquor end is higher than the liquid outlet of concentrated solution goes out the liquid box and the liquid level of concentrated solution play liquid box normal work.

2. An auto-unpluggable lithium bromide absorption unit according to claim 1 wherein the bypass conduit comprises a bypass heat exchange section located within the heat exchanger adjacent the concentrate heat exchange conduit, the bypass heat exchange section being located between the inlet and outlet ends of the bypass conduit.

3. The lithium bromide absorption unit capable of automatically unblocking according to claim 2, wherein the bypass heat exchange pipe section and the dilute solution heat exchange pipe are respectively arranged at two sides of the concentrated solution heat exchange pipe.

4. An automatic unpluggable lithium bromide absorption unit according to claim 1 wherein the weak solution heat exchange tube is helically wound around the strong solution heat exchange tube.

5. The lithium bromide absorption unit capable of automatically unblocking according to claim 1, wherein the pipe mouth of the inlet end of the by-pass pipe is lower than the inlet of the concentrated solution outlet tank.

6. The lithium bromide absorption unit capable of automatically unblocking according to claim 5, wherein a pipe orifice of the inlet end of the by-pass pipe extends into the concentrated solution outlet tank from the bottom of the concentrated solution outlet tank, and the pipe orifice of the inlet end of the by-pass pipe is far away from the inlet of the concentrated solution outlet tank.

7. The lithium bromide absorption unit capable of automatically unblocking according to claim 6, wherein a liquid baffle plate is arranged between the pipe orifice of the inlet end of the by-pass pipe and the inlet of the concentrated solution outlet tank.

8. The lithium bromide absorption unit capable of automatically unblocking according to claim 1, wherein a circulating pump is arranged between the liquid inlet end of the dilute solution heat exchange pipe and the absorber.

9. The lithium bromide absorption unit capable of automatically unblocking according to claim 8, wherein a liquid distributor is arranged in the absorber, and the liquid outlet end of the concentrated solution heat exchange pipe is connected with the liquid distributor of the absorber.

10. The lithium bromide absorption unit capable of automatically unblocking according to claim 9, wherein the liquid distributor is a spray distributor.

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