CN212390647U - Directly-heated type class II heat pump - Google Patents
Directly-heated type class II heat pump Download PDFInfo
- Publication number
- CN212390647U CN212390647U CN202021128417.3U CN202021128417U CN212390647U CN 212390647 U CN212390647 U CN 212390647U CN 202021128417 U CN202021128417 U CN 202021128417U CN 212390647 U CN212390647 U CN 212390647U
- Authority
- CN
- China
- Prior art keywords
- sewage
- flash
- refrigerant water
- lithium bromide
- heat exchange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Abstract
A directly-heated type two-class heat pump belongs to the technical field of industrial waste heat recovery. The utility model provides a current class II absorption heat pump can't utilize the dirty waste water of industry of easy scale deposit, high corrosivity as the problem of waste heat source. The evaporator and the inside evacuation of generator are realized through the flash vacuum pump, the upper portion intercommunication of first flash chamber is provided with first dirty waste water inlet tube, the upper portion intercommunication of second flash chamber is provided with the dirty waste water inlet tube of second, dirty waste water carries out the flash distillation in two flash chambers, steam upward movement after the flash distillation corresponds and carries out the heat transfer with the refrigerant water of refrigerant water intracavity and the dilute lithium bromide solution of lithium bromide solution intracavity, falling film evaporation behind the refrigerant water heat transfer in the refrigerant water chamber, steam entering absorber after the evaporation, the refrigerant water in the dilute lithium bromide solution is heated and is evaporated, steam after the evaporation gets into the condenser.
Description
Technical Field
The utility model relates to a directly-heated type class II heat pump belongs to industry waste heat recovery technical field.
Background
The second type of lithium bromide absorption heat pump unit is equipment that recovers and utilizes the heat energy of low temperature heat sources (such as waste hot water) to prepare needed processes or high temperature heating media (hot water) for heating, and realizes the heat energy transmission from low temperature to high temperature. It does not require a higher temperature heat source to drive, but requires a lower temperature cooling water. It uses low-temperature heat source (waste hot water) as driving heat source, and under the condition of adopting low-temperature cooling water, it can prepare heat medium (hot water) whose temperature is higher than that of low-temperature heat source.
The low-temperature heat source used by the existing second-class heat pump can only be relatively clean waste hot water which is not easy to scale on the wall surface of a heat exchange tube and corrode the heat exchange surface, and waste water with high soluble solid content and strong corrosiveness cannot directly enter the second-class heat pump unit for waste heat recovery.
In the production process of the industries such as metallurgy, coal chemical industry, salt chemical industry and the like, most of process circulating cooling water or process wastewater is sewage and wastewater which is corrosive, easy to deposit and easy to scale, and the waste of a large amount of industrial waste heat is caused because the waste water cannot be subjected to waste heat energy recovery.
Disclosure of Invention
The utility model relates to a solve the unable problem that utilizes the dirty waste water of industry of easy scale deposit, high corrosivity as the waste heat source of current class II absorption heat pump, and then provide a directly-heated type class II heat pump.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
a directly-heated type two-class heat pump comprises an evaporator, an absorber, a generator and a condenser,
the evaporator comprises a refrigerant water cavity positioned at the upper part and a first flash chamber positioned below the refrigerant water cavity, and refrigerant water enters the refrigerant water cavity through a pipeline;
the generator comprises a lithium bromide solution cavity positioned at the upper part and a second flash chamber positioned below the lithium bromide solution cavity, the upper part of the lithium bromide solution cavity is communicated with the lower part of the absorber through a dilute lithium bromide solution pipe, the lower part of the lithium bromide solution cavity is communicated with the upper part of the absorber through a concentrated lithium bromide solution pipe,
the evaporator and the inside evacuation of generator are realized through the flash vacuum pump, the upper portion intercommunication of first flash chamber is provided with first dirty waste water inlet tube, the upper portion intercommunication of second flash chamber is provided with the dirty waste water inlet tube of second, dirty waste water carries out the flash distillation in two flash chambers, steam upward movement after the flash distillation corresponds and carries out the heat transfer with the refrigerant water of refrigerant water intracavity and the dilute lithium bromide solution of lithium bromide solution intracavity, falling film evaporation behind the refrigerant water heat transfer in the refrigerant water chamber, steam entering absorber after the evaporation, the refrigerant water in the dilute lithium bromide solution is heated and is evaporated, steam after the evaporation gets into the condenser.
Furthermore, a plurality of first heat exchange tubes are arranged in the refrigerant water cavity, two ends of the first heat exchange tubes are respectively communicated with the outer space of the refrigerant water cavity, steam after flash evaporation in the first flash chamber enters the first heat exchange tubes through one ends of the first heat exchange tubes and exchanges heat with refrigerant water outside the first heat exchange tubes, and the steam in the first heat exchange tubes is discharged through the other ends of the first heat exchange tubes after being condensed into water through heat exchange.
Furthermore, a plurality of second heat exchange tubes are arranged in the lithium bromide solution cavity, two ends of the plurality of second heat exchange tubes are respectively communicated with the outer space of the lithium bromide solution cavity, steam after flash evaporation in the second flash chamber enters the second heat exchange tubes through one ends of the plurality of second heat exchange tubes and exchanges heat with dilute lithium bromide solution outside the second heat exchange tubes, and the steam in the second heat exchange tubes is discharged through the other ends of the second heat exchange tubes after being condensed into water through heat exchange.
Furthermore, demisters are respectively arranged between the refrigerant water cavity and the first flash chamber and between the lithium bromide solution cavity and the second flash chamber.
Furthermore, a first condensate water tank is arranged on the outer side of the refrigerant water cavity and communicated with the other ends of the first heat exchange tubes, and a second condensate water tank is arranged on the outer side of the lithium bromide solution cavity and communicated with the other ends of the second heat exchange tubes.
Further, the first sewage and wastewater inlet pipe is horizontally or vertically arranged.
Further, when first dirty waste water inlet tube is vertical to be arranged, the quantity of cryogen water cavity is two, and the relative arrangement is in the both sides of first dirty waste water inlet tube, and the steam after the flash distillation in the first flash chamber gets into cryogen water cavity through two cryogen water cavity relative one sides and carries out the heat transfer.
Furthermore, a refrigerant water sprayer is arranged at the upper part of the refrigerant water cavity, a first refrigerant water tank is arranged at the lower part of the refrigerant water cavity, and the first refrigerant water tank is communicated with the refrigerant water sprayer through a pipeline; the lower part of the condenser is a second refrigerant water tank, and the second refrigerant water tank is communicated with the refrigerant water sprayer through a pipeline.
Further, sewage and wastewater carries out the one-level flash distillation through first sewage and wastewater inlet tube intercommunication entering first flash chamber, and the sewage and wastewater after the one-level flash distillation carries out the second grade flash distillation through the dirty and wastewater inlet tube intercommunication entering second flash chamber of second, and the sewage and wastewater after the second grade flash distillation takes place the ware through sewage and wastewater outlet pipe.
Further, the dirty waste water inlet pipe of second is vertical to be arranged and its bottom is located the second flash chamber.
Furthermore, the quantity of lithium bromide solution chamber is two, and the relative arrangement is in the both sides of the dirty waste water inlet tube of second, and the steam after the flash distillation in the second flash chamber gets into the lithium bromide solution intracavity through two lithium bromide solution chamber one sides that are relative and carries out the heat transfer.
Further, dirty waste water corresponds the entering first flash chamber and carries out the flash distillation in the second flash chamber through first dirty waste water inlet tube and the dirty waste water inlet tube of second respectively, and the lower part of every flash chamber communicates respectively and is provided with dirty waste water and moves back the water pipe, and the dirty waste water after the flash distillation in every flash chamber corresponds the dirty waste water that moves back the water pipe discharge through its intercommunication.
Compared with the prior art, the utility model has the following effect:
through the second-class heat pump unit, the medium-temperature industrial sewage with corrosivity, easy deposition and easy scaling can directly enter the second-class heat pump without causing the problems of corrosion, scaling, blockage and the like, and the efficient clean recovery of the waste heat energy of the industrial sewage is realized. The sewage and wastewater enters the evaporator and the generator to be subjected to flash evaporation, and the steam after flash evaporation directly moves upwards to participate in heat exchange, so that the heat loss of the flash evaporation steam is effectively reduced, and the working efficiency of the second-class heat pump unit is greatly improved.
Through the second type heat pump unit of this application, can retrieve and waste heat quantity assorted clean flash distillation comdenstion water when waste heat recovery, realize the concentrated processing of industry sewage waste water and clear flash distillation comdenstion water recovery simultaneously at the recovery waste heat.
Drawings
FIG. 1 is a schematic top view of the present application with two wastewater inlet pipes arranged in series;
FIG. 2 is a schematic sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic sectional view taken along line B-B of FIG. 1;
FIG. 4 is a schematic top view of the present application with two wastewater inlet pipes arranged in parallel;
FIG. 5 is a schematic cross-sectional view taken along line C-C of FIG. 4;
fig. 6 is a schematic sectional view taken along line D-D of fig. 4.
Detailed Description
The first embodiment is as follows: the present embodiment will be described with reference to fig. 1 to 6, in which a directly-heated type heat pump of two types includes an evaporator (1), an absorber (2), a generator (3) and a condenser (4),
the evaporator (1) comprises a refrigerant water cavity (1-1) positioned at the upper part and a first flash chamber (1-2) positioned below the refrigerant water cavity (1-1), and refrigerant water enters the refrigerant water cavity (1-1) through a pipeline;
the generator (3) comprises a lithium bromide solution cavity (3-1) positioned at the upper part and a second flash chamber (3-2) positioned below the lithium bromide solution cavity (3-1), the upper part of the lithium bromide solution cavity (3-1) is communicated with the lower part of the absorber (2) through a dilute lithium bromide solution pipe (5), the lower part of the lithium bromide solution cavity (3-1) is communicated with the upper part of the absorber (2) through a concentrated lithium bromide solution pipe (6),
the interior of an evaporator (1) and a generator (3) is vacuumized through a flash vacuum pump (7), the upper portion of a first flash chamber (1-2) is communicated with a first sewage and wastewater inlet pipe (1-3), the upper portion of a second flash chamber (3-2) is communicated with a second sewage and wastewater inlet pipe (3-3), sewage and wastewater are subjected to flash evaporation in the two flash chambers, steam after flash evaporation moves upwards and correspondingly exchanges heat with refrigerant water in a refrigerant water cavity (1-1) and dilute lithium bromide solution in a lithium bromide solution cavity (3-1), the refrigerant water in the refrigerant water cavity (1-1) is subjected to falling film evaporation after heat exchange, the evaporated steam enters an absorber (2), the refrigerant water in the dilute lithium bromide solution is heated and evaporated, and the evaporated steam enters a condenser (4).
The two flash chambers are kept in a negative pressure state by pumping air through a flash vacuum pump (7). The evaporator (1) and the generator (3) can be respectively communicated with the same flash vacuum pump (7) through pipelines, the mode is also a preferred vacuumizing mode, and the flash vacuum pumps (7) can be respectively communicated with each other through pipelines. The two sewage and wastewater inlet pipes can be arranged in the evaporator and the generator in a series connection mode or in a parallel connection mode.
When the serial connection mode is adopted, sewage and wastewater are subjected to two-stage flash evaporation, the first-stage flash evaporation in the evaporator is used as a waste heat source of the second-type heat pump, and the second-stage flash evaporation in the generator is used as a driving heat source of the second-type heat pump; the flash vacuum pump and the condensate pump can be shared, and the operation energy consumption is lower.
When the parallel connection mode is adopted, the sewage and the wastewater simultaneously enter the evaporator and the generator through the two pipelines for flash evaporation, and the two flash evaporation chambers are respectively communicated with the sewage and the wastewater return pipe.
A first steam channel (8) is arranged between the evaporator (1) and the absorber (2), and a second steam channel (9) is arranged between the generator (3) and the condenser (4). Through the first steam channel (8) and the second steam channel (9), the steam in the evaporator (1) enters the absorber (2) conveniently, and the steam in the generator (3) enters the condenser (4) conveniently.
The sewage and wastewater discharge pump (10) is communicated with the sewage and wastewater return pipe (3-4) so as to facilitate the discharge of sewage and wastewater in the flash chamber.
The first sewage and wastewater inlet pipe (1-3) and the second sewage and wastewater inlet pipe (3-3) are both straight pipes or conical pipes.
The connection relation among the internal structures of the absorber (2) and the condenser (4) and the structures can adopt the structures and the connection relation in the prior art, and the working principle is the same as that in the prior art.
The absorber (2) comprises a solution sprayer (2-1), a third heat exchange tube (2-2), a liquid inlet tube (2-3) of the liquid to be heated, a liquid outlet tube (2-4) of the liquid to be heated and a solution pool (2-5) positioned at the lower part of the absorber (2), wherein the liquid inlet tube (2-3) of the liquid to be heated and the liquid outlet tube (2-4) of the liquid to be heated are externally connected with an inlet and an outlet of the third heat exchange tube respectively;
the condenser (4) comprises a fourth heat exchange tube (4-1), a cooling water inlet tube (4-2), a cooling water outlet tube (4-3) and a second refrigerant water pool (4-4) positioned at the lower part of the condenser (4), wherein the cooling water inlet tube (4-2) and the cooling water outlet tube (4-3) are respectively externally connected with an inlet and an outlet of the fourth heat exchange tube (4-1);
the dilute lithium bromide heat exchange device is characterized in that a dilute lithium bromide pump (11) is arranged on the dilute lithium bromide solution pipe (5), a concentrated lithium bromide pump (12) is arranged on the concentrated lithium bromide solution pipe (6), dilute lithium bromide solution in the absorber (2) is conveyed into the lithium bromide solution cavity (3-1) through the dilute lithium bromide pump (11) and the dilute lithium bromide solution pipe (5), concentrated lithium bromide solution formed in the lithium bromide solution cavity (3-1) is conveyed into the absorber (2) through the concentrated lithium bromide pump (12) and the concentrated lithium bromide solution pipe (6), then the concentrated lithium bromide solution is sprayed to the surface of the third heat exchange pipe (2-2) through the solution sprayer (2-1), and heat exchange is carried out with liquid to be heated in the third heat exchange pipe (2-2).
The absorber (2) is communicated with a first system vacuum pump (13) from the outside, and the condenser (4) is communicated with a second system vacuum pump (14) from the outside.
Through the second-class heat pump, the medium-temperature industrial sewage and waste water with corrosivity, easy deposition and easy scaling can directly enter the second-class heat pump without causing the problems of corrosion, scaling, blockage and the like, and the efficient clean recovery of the waste heat energy of the industrial sewage and waste water is realized.
Through the second type heat pump of this application, can be when waste heat recovery, retrieve with waste heat quantity assorted clean flash distillation comdenstion water, realize the dirty waste water concentration of industry simultaneously and handle and clear flash distillation comdenstion water recovery at the recovery waste heat. )
A plurality of first heat exchange tubes (1-4) are arranged in the refrigerant water cavity (1-1), two ends of the first heat exchange tubes (1-4) are respectively communicated with the outer space of the refrigerant water cavity (1-1), steam after flash evaporation in the first flash chamber (1-2) enters the first heat exchange tubes (1-4) through one ends of the first heat exchange tubes (1-4) and exchanges heat with refrigerant water outside the first heat exchange tubes (1-4), and the steam in the first heat exchange tubes (1-4) is condensed into water after heat exchange and is discharged through the other ends of the first heat exchange tubes (1-4). (the sewage and wastewater flash steam enters a tube pass, refrigerant water enters a shell pass in an evaporator (1) and falling film evaporation occurs outside the tube.)
A plurality of second heat exchange tubes (3-5) are arranged in the lithium bromide solution cavity (3-1), two ends of the second heat exchange tubes (3-5) are respectively communicated with the outer space of the lithium bromide solution cavity (3-1), steam after flash evaporation in the second flash evaporation chamber (3-2) enters the second heat exchange tubes (3-5) through one ends of the second heat exchange tubes (3-5) and exchanges heat with dilute lithium bromide solution outside the second heat exchange tubes (3-5), and the steam in the second heat exchange tubes (3-5) is condensed into water after heat exchange and is discharged through the other ends of the second heat exchange tubes (3-5). (flash steam of sewage and wastewater enters a tube pass, dilute lithium bromide solution enters a shell pass, and evaporation occurs outside the tube.)
Demisters (15) are respectively arranged between the refrigerant water cavity (1-1) and the first flash chamber (1-2) and between the lithium bromide solution cavity (3-1) and the second flash chamber (3-2). (to remove entrained droplets in the vapor.)
A first condensate water tank (1-5) is arranged on the outer side of the refrigerant water cavity (1-1), the first condensate water tank (1-5) is communicated with the other ends of the first heat exchange tubes (1-4), a second condensate water tank (3-6) is arranged on the outer side of the lithium bromide solution cavity (3-1), and the second condensate water tank (3-6) is communicated with the other ends of the second heat exchange tubes (3-5). (the flash evaporation vacuum pump (7) is communicated with the upper part of the condensate water tank, and condensate water in the first heat exchange tubes (1-4) and the second heat exchange tubes (3-5) is collected through the condensate water tank, the first condensate water tank (1-5) can be arranged inside or outside the evaporator (1), and the second condensate water tank (3-6) can be arranged inside or outside the generator (3), so long as the collection of the condensate water can be realized.)
The condensed water in the first condensed water tank (1-5) and the condensed water in the second condensed water tank (3-6) are discharged through a condensed water pump (16). (the first condensate water tanks (1-5) and the second condensate water tanks (3-6) can be respectively communicated with the same condensate water pump (16) through pipelines, the mode is also the preferable mode for removing the condensate water, and can also be respectively communicated with one condensate water pump (16) through pipelines, the condensate water in the two condensate water tanks is discharged through the condensate water pumps (16))
The first sewage and wastewater inlet pipe (1-3) is arranged horizontally or vertically. (the arrangement mode of the first sewage and wastewater inlet pipe (1-3) is not limited as long as sewage and wastewater can be conveyed into the first flash chamber (1-2). when the first sewage and wastewater inlet pipe (1-3) is vertically arranged, the first sewage and wastewater inlet pipe can penetrate through the refrigerant water cavity (1-1) and enter the first flash chamber (1-2) or be positioned at one side of the refrigerant water cavity (1-1), as long as the first heat exchange pipe (1-4) for steam entering the refrigerant water cavity (1-1) is not influenced.)
When the first sewage and wastewater inlet pipe (1-3) is vertically arranged, the number of the refrigerant water cavities (1-1) is two, the two refrigerant water cavities are oppositely arranged on two sides of the first sewage and wastewater inlet pipe (1-3), and steam after flash evaporation in the first flash chamber (1-1) enters the refrigerant water cavities (1-1) through one opposite side of the two refrigerant water cavities (1-1) for heat exchange.
The upper part of the refrigerant water cavity (1-1) is provided with a refrigerant water sprayer (1-6). (through setting up cryogen water shower (1-6), make the heat transfer effect better.)
The lower part of the refrigerant water cavity (1-1) is provided with a first refrigerant water tank, and the first refrigerant water tank is communicated with the refrigerant water sprayer (1-6) through a pipeline. (the refrigerant water in the first refrigerant water tank is conveyed to the refrigerant water sprayers (1-6) through a pipeline which is a first refrigerant water pipe (17). the first refrigerant water pipe (17) is provided with a first refrigerant water pump (18).)
The lower part of the condenser (4) is provided with a second refrigerant water tank (4-4), and the second refrigerant water tank (4-4) is communicated with the refrigerant water sprayer (1-6) through a pipeline. (the refrigerant water in the second refrigerant water tank (4-4) is conveyed to the refrigerant water sprayers (1-6) through a pipeline which is a second refrigerant water pipe (19), and a second refrigerant water pump (20) is arranged on the second refrigerant water pipe (19))
The sewage and wastewater enter the first flash chamber (1-2) through the first sewage and wastewater inlet pipe (1-3) for primary flash evaporation, the sewage and wastewater after the primary flash evaporation enter the second flash chamber (3-2) through the second sewage and wastewater inlet pipe (3-3) for secondary flash evaporation, and the sewage and wastewater after the secondary flash evaporation is discharged out of the generator (3) through the sewage and wastewater return pipe (3-4). (that is, two sewage and wastewater inlet pipes are connected in series to realize two-stage flash evaporation of sewage and wastewater, the sewage and wastewater are subjected to two-stage flash evaporation, the first-stage flash evaporation in the evaporator is used as a waste heat source of a second-type heat pump, the second-stage flash evaporation in the generator is used as a driving heat source of the second-type heat pump, and a flash evaporation vacuum pump and a condensate pump can be shared and have lower energy consumption in operation.)
The second sewage and wastewater inlet pipe (3-3) is vertically arranged, and the bottom end of the second sewage and wastewater inlet pipe is positioned in the second flash chamber (3-2). (the second sewage and wastewater inlet pipe (3-3) can also be horizontally arranged, so that one end of the second sewage and wastewater inlet pipe is positioned at the upper part of the second flash chamber (3-2), and the other end of the second sewage and wastewater inlet pipe is communicated with the lower part of the first flash chamber (1-2) through a pipeline, so that sewage and wastewater which is subjected to primary flash evaporation in the first flash chamber (1-2) can smoothly enter the second flash chamber (3-2))
The number of the lithium bromide solution cavities (3-1) is two, the two lithium bromide solution cavities are oppositely arranged at two sides of the second sewage inlet pipe (3-3), and steam after flash evaporation in the second flash evaporation chamber (3-2) enters the lithium bromide solution cavity (3-1) through one side of the two lithium bromide solution cavities (3-1) opposite to each other for heat exchange.
The sewage and wastewater respectively enter a first flash chamber (1-2) and a second flash chamber (3-2) through a first sewage and wastewater inlet pipe (1-3) and a second sewage and wastewater inlet pipe (3-3) to be subjected to flash evaporation, the lower part of each flash chamber is respectively communicated with a sewage and wastewater return pipe, and the sewage and wastewater after flash evaporation in each flash chamber is discharged through the sewage and wastewater return pipe communicated with the flash chambers. (namely, two sewage and wastewater inlet pipes are connected in parallel and flash-evaporated in the evaporator 1 and the generator 3 respectively.)
The working principle is as follows:
when two sewage and wastewater inlet pipes are arranged in series, sewage and wastewater firstly enter an evaporator (1) as a waste heat source to generate primary flash evaporation, flash evaporation steam enters first heat exchange pipes (1-4) to exchange heat with refrigerant water sprayed outside the evaporator, simultaneously, under the action of a first system vacuum pump (13), the space outside the evaporator (1) and the inside of an absorber (2) are also maintained in a vacuum state, the refrigerant water outside the evaporator absorbs the heat of the flash evaporation steam in the pipes to evaporate under the vacuum state, the evaporated refrigerant water steam enters the absorber (2) through a first steam channel (8), is absorbed by concentrated lithium bromide solution in the absorber (2) and emits heat, the heat is transferred to low-temperature liquid to be heated through a third heat exchange pipe (2-2), and the temperature of the low-temperature liquid to be heated is raised and then output to a heat user.
Concentrated lithium bromide solution in the absorber (2) absorbs water and then becomes dilute lithium bromide solution which is collected to the lower part of the absorber (2), and then the dilute lithium bromide solution is sent to a shell side in a lithium bromide solution cavity (3-1) in the generator (3) through a dilute lithium bromide solution pump and a dilute lithium bromide solution pipe (5).
The sewage and wastewater subjected to primary flash evaporation in the evaporator (1) is taken as a driving heat source of a second-type heat pump and enters a second flash chamber (3-2) in the generator (3) through a second sewage and wastewater inlet pipe (3-3), flash evaporation is carried out again in the second vacuum flash chamber (3-2), flash evaporation steam enters a second heat exchange pipe (3-5) in the generator (3), refrigerant water in a dilute lithium bromide solution outside the second heat exchange pipe (3-5) is heated and evaporated, the dilute lithium bromide solution is changed into a concentrated lithium bromide solution again and is collected to the bottom of a lithium bromide solution cavity (3-1), and the concentrated lithium bromide solution is conveyed to the absorber (2) through a concentrated lithium bromide solution pipe (6).
The heat exchange is carried out between the concentrated lithium bromide solution and the dilute lithium bromide delivered by the generator (3) in the delivery process of the concentrated lithium bromide solution through a heat exchanger, so that the temperature of the concentrated lithium bromide is reduced, and the temperature of the dilute lithium bromide solution is increased, thereby being beneficial to the reaction in the absorber (2) and the generator (3).
Cryogen steam heated and evaporated in the generator (3) enters the condenser (4) through the second steam channel (9), is subjected to heat release and condensation through cooling circulating water in the fourth heat exchange tube (4-1) in the condenser (4), is changed into cryogen water again and is collected in the second cryogen water pool (4-4) at the lower part of the condenser (4), and is conveyed to the outside of the first heat exchange tube (1-4) of the evaporator (1) through the second cryogen water pump (20) to be sprayed and evaporated again.
When two dirty waste water inlet pipe parallel mode were arranged, dirty waste water got into evaporimeter and generator simultaneously through two pipelines respectively and carries out the flash distillation, and two flash distillation rooms communicate dirty waste water outlet pipe separately. The working principle of other components is the same as that when two sewage and wastewater inlet pipes are arranged in series.
The utility model discloses can realize the waste heat recovery of flue gas behind the wet flue gas desulfurization under the prerequisite that does not need the external drive heat source, concrete application method is: the desulfurization slurry circulating in the wet desulfurization tower is completely or partially directly introduced into the second-class heat pump, the residual heat of the desulfurization slurry is extracted through the second-class heat pump, the temperature of the slurry is reduced after the residual heat is extracted, the low-temperature slurry returns to the original spraying layer of the cooling tower to spray flue gas, the temperature of the slurry rises to return to the desulfurization tower collecting tank after the slurry absorbs the heat of the flue gas, and then the slurry is lifted to the desulfurization tower collecting tank by the desulfurization tower circulating water pump, so that the residual heat of the flue gas is continuously recovered; the utility model discloses not only can retrieve desulfurization back flue gas waste heat, pass through the condensate water in the flue gas simultaneously the utility model discloses flash distillation comes out in the thick liquid, has reached the water conservation purpose like this, does not destroy former desulfurization system's water balance again, in addition, retrieves the waste heat through this application and makes and spray in getting back to the desulfurizing tower again after the thick liquid temperature reduces, can further reduce flue gas exhaust temperature, reduces the flue gas water content simultaneously, reaches the flue gas and takes off white purpose.
Claims (12)
1. A directly-heated type heat pump of two types is characterized in that: it comprises an evaporator (1), an absorber (2), a generator (3) and a condenser (4),
the evaporator (1) comprises a refrigerant water cavity (1-1) positioned at the upper part and a first flash chamber (1-2) positioned below the refrigerant water cavity (1-1), and refrigerant water enters the refrigerant water cavity (1-1) through a pipeline;
the generator (3) comprises a lithium bromide solution cavity (3-1) positioned at the upper part and a second flash chamber (3-2) positioned below the lithium bromide solution cavity (3-1), the upper part of the lithium bromide solution cavity (3-1) is communicated with the lower part of the absorber (2) through a dilute lithium bromide solution pipe (5), the lower part of the lithium bromide solution cavity (3-1) is communicated with the upper part of the absorber (2) through a concentrated lithium bromide solution pipe (6),
the interior of an evaporator (1) and a generator (3) is vacuumized through a flash vacuum pump (7), the upper portion of a first flash chamber (1-2) is communicated with a first sewage and wastewater inlet pipe (1-3), the upper portion of a second flash chamber (3-2) is communicated with a second sewage and wastewater inlet pipe (3-3), sewage and wastewater are subjected to flash evaporation in the two flash chambers, steam after flash evaporation moves upwards and correspondingly exchanges heat with refrigerant water in a refrigerant water cavity (1-1) and dilute lithium bromide solution in a lithium bromide solution cavity (3-1), the refrigerant water in the refrigerant water cavity (1-1) is subjected to falling film evaporation after heat exchange, the evaporated steam enters an absorber (2), the refrigerant water in the dilute lithium bromide solution is heated and evaporated, and the evaporated steam enters a condenser (4).
2. The direct-heating type class ii heat pump according to claim 1, characterized in that: a plurality of first heat exchange tubes (1-4) are arranged in the refrigerant water cavity (1-1), two ends of the first heat exchange tubes (1-4) are respectively communicated with the outer space of the refrigerant water cavity (1-1), steam after flash evaporation in the first flash chamber (1-2) enters the first heat exchange tubes (1-4) through one ends of the first heat exchange tubes (1-4) and exchanges heat with refrigerant water outside the first heat exchange tubes (1-4), and the steam in the first heat exchange tubes (1-4) is condensed into water after heat exchange and is discharged through the other ends of the first heat exchange tubes (1-4).
3. The directly heated type two-class heat pump according to claim 2, characterized in that: a plurality of second heat exchange tubes (3-5) are arranged in the lithium bromide solution cavity (3-1), two ends of the second heat exchange tubes (3-5) are respectively communicated with the outer space of the lithium bromide solution cavity (3-1), steam after flash evaporation in the second flash evaporation chamber (3-2) enters the second heat exchange tubes (3-5) through one ends of the second heat exchange tubes (3-5) and exchanges heat with dilute lithium bromide solution outside the second heat exchange tubes (3-5), and the steam in the second heat exchange tubes (3-5) is condensed into water after heat exchange and is discharged through the other ends of the second heat exchange tubes (3-5).
4. The directly heated type two-class heat pump according to claim 3, characterized in that: demisters (15) are respectively arranged between the refrigerant water cavity (1-1) and the first flash chamber (1-2) and between the lithium bromide solution cavity (3-1) and the second flash chamber (3-2).
5. Directly-heated type two-class heat pump according to claim 3 or 4, characterized in that: a first condensate water tank (1-5) is arranged on the outer side of the refrigerant water cavity (1-1), the first condensate water tank (1-5) is communicated with the other ends of the first heat exchange tubes (1-4), a second condensate water tank (3-6) is arranged on the outer side of the lithium bromide solution cavity (3-1), and the second condensate water tank (3-6) is communicated with the other ends of the second heat exchange tubes (3-5).
6. The directly heated type two-class heat pump according to claim 5, characterized in that: the first sewage and wastewater inlet pipe (1-3) is arranged horizontally or vertically.
7. The direct-heating type two-kind heat pump according to claim 1, 2, 3, 4 or 6, characterized in that: when the first sewage and wastewater inlet pipe (1-3) is vertically arranged, the number of the refrigerant water cavities (1-1) is two, the two refrigerant water cavities are oppositely arranged on two sides of the first sewage and wastewater inlet pipe (1-3), and steam after flash evaporation in the first flash chamber (1-2) enters the refrigerant water cavities (1-1) through one opposite side of the two refrigerant water cavities (1-1) for heat exchange.
8. The directly heated type two-class heat pump according to claim 7, wherein: the upper part of the refrigerant water cavity (1-1) is provided with a refrigerant water sprayer (1-6), the lower part of the refrigerant water cavity (1-1) is provided with a first refrigerant water tank, and the first refrigerant water tank is communicated with the refrigerant water sprayer (1-6) through a pipeline; the lower part of the condenser (4) is provided with a second refrigerant water tank (4-4), and the second refrigerant water tank (4-4) is communicated with the refrigerant water sprayer (1-6) through a pipeline.
9. The directly heated type two-class heat pump according to claim 8, wherein: the sewage and wastewater enter the first flash chamber (1-2) through the first sewage and wastewater inlet pipe (1-3) for primary flash evaporation, the sewage and wastewater after the primary flash evaporation enter the second flash chamber (3-2) through the second sewage and wastewater inlet pipe (3-3) for secondary flash evaporation, and the sewage and wastewater after the secondary flash evaporation is discharged out of the generator (3) through the sewage and wastewater return pipe (3-4).
10. The directly heated type two-class heat pump according to claim 9, characterized in that: the second sewage and wastewater inlet pipe (3-3) is vertically arranged, and the bottom end of the second sewage and wastewater inlet pipe is positioned in the second flash chamber (3-2).
11. Directly heated heat pump of two types according to claim 1, 2, 3, 4, 6, 8, 9 or 10, characterized in that: the number of the lithium bromide solution cavities (3-1) is two, the two lithium bromide solution cavities are oppositely arranged at two sides of the second sewage inlet pipe (3-3), and steam after flash evaporation in the second flash evaporation chamber (3-2) enters the lithium bromide solution cavity (3-1) through one side of the two lithium bromide solution cavities (3-1) opposite to each other for heat exchange.
12. The direct-heating type class ii heat pump according to claim 11, characterized in that: the sewage and wastewater respectively enter a first flash chamber (1-2) and a second flash chamber (3-2) through a first sewage and wastewater inlet pipe (1-3) and a second sewage and wastewater inlet pipe (3-3) to be subjected to flash evaporation, the lower part of each flash chamber is respectively communicated with a sewage and wastewater return pipe, and the sewage and wastewater after flash evaporation in each flash chamber is discharged through the sewage and wastewater return pipe communicated with the flash chambers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021128417.3U CN212390647U (en) | 2020-06-17 | 2020-06-17 | Directly-heated type class II heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021128417.3U CN212390647U (en) | 2020-06-17 | 2020-06-17 | Directly-heated type class II heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212390647U true CN212390647U (en) | 2021-01-22 |
Family
ID=74255180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021128417.3U Active CN212390647U (en) | 2020-06-17 | 2020-06-17 | Directly-heated type class II heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212390647U (en) |
-
2020
- 2020-06-17 CN CN202021128417.3U patent/CN212390647U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104925883A (en) | Concentrated salt waste water energy-saving treatment device | |
| CN107337245A (en) | A kind of spraying system that desulfurization wastewater is concentrated using fume afterheat | |
| CN213286338U (en) | Low-temperature flue gas waste heat recovery and purification tower | |
| CN212390647U (en) | Directly-heated type class II heat pump | |
| CN105664514A (en) | Horizontal mvc evaporator | |
| CN104030379A (en) | Evaporator for treating oily sewage | |
| CN216808191U (en) | High-efficient treatment evaporator for high-salt high-concentration organic wastewater | |
| CN111721029A (en) | Directly-heated type class II heat pump | |
| CN212227434U (en) | Sewage and waste water source vapor compression flooded heat pump unit | |
| CN212457501U (en) | Straight-through type two-class heat pump | |
| CN107638708B (en) | Series-parallel connection integrated multi-effect evaporator | |
| CN109292860A (en) | Falling film evaporation couples absorption refrigeration high-salt sewage processing equipment and high-salt sewage processing method | |
| CN211871447U (en) | Two-stage forced circulation evaporation system for landfill leachate | |
| CN210663442U (en) | Waste water direct-feeding lithium bromide absorption heat pump unit | |
| CN212227436U (en) | Straight-through heat pump | |
| CN210698834U (en) | Triple-effect series-connection horizontal pipe falling film steam recompression evaporator | |
| CN210663439U (en) | High-temperature wastewater lithium bromide absorption refrigeration all-in-one machine | |
| CN206751452U (en) | A kind of spraying system that desulfurization wastewater is concentrated using fume afterheat | |
| CN111578560B (en) | Straight-through heat pump | |
| CN212227437U (en) | Directly-heated heat pump | |
| CN213220988U (en) | Evaporator condensation water cooling system | |
| CN212431398U (en) | Sewage and wastewater source steam compression dry heat pump unit | |
| CN110882553A (en) | Low-temperature vacuum evaporator | |
| CN111578560A (en) | Straight-through heat pump | |
| CN217661554U (en) | Skid-mounted triple-effect evaporation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |