CN213983718U - Novel steam condensate water waste heat recovery system for heating - Google Patents

Novel steam condensate water waste heat recovery system for heating Download PDF

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CN213983718U
CN213983718U CN202022785947.1U CN202022785947U CN213983718U CN 213983718 U CN213983718 U CN 213983718U CN 202022785947 U CN202022785947 U CN 202022785947U CN 213983718 U CN213983718 U CN 213983718U
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steel pipe
water
steam
communicated
pipe
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罗龙
张云
陈方元
余霞
程钊
余志雄
崔翔
闫梓祥
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WUHAN DEWN ENGINEERING TECHNOLOGY CO LTD
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WUHAN DEWN ENGINEERING TECHNOLOGY CO LTD
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Abstract

The utility model provides a novel steam condensate waste heat recovery system for heating, which comprises a steam-water heat exchanger and an absorption heat pump unit, wherein one side of the steam-water heat exchanger is connected with a steam-liquid separator in parallel through a first steel pipe and a third steel pipe respectively, and the other side of the steam-water heat exchanger is connected with a second steel pipe and a fourth steel pipe in parallel; the absorption heat pump is adopted for recovering the waste heat of the condensed water, the temperature of the condensed water can be reduced to 25 ℃, the conventional heat exchange can be broken through, the temperature of the condensed water can only be close to 50 ℃ of the second network, and the waste heat resource of the condensed water is utilized to the maximum extent.

Description

Novel steam condensate water waste heat recovery system for heating
Technical Field
The utility model relates to a heating heat transfer field especially relates to a novel steam condensate water waste heat recovery system for heating.
Background
Energy conservation and emission reduction are problems to be solved urgently in current social development, the purpose of utilizing waste heat of steam condensate water is to enable limited energy of steam to exert maximum value, develop circular economy, improve energy utilization efficiency, reduce energy consumption, reduce emission of heat source heating pollutants and effectively protect the environment.
A large amount of condensed water is generated in the civil heating heat exchange process, only a small part of the condensed water is recycled due to the instability of the outlet water temperature at present, and the rest part of the condensed water is directly discharged into a municipal sewage pipe network, so that the waste is great. The problem of white smoke emission at the position where steam condensate is discharged can be seen frequently near a community heat exchange station in winter, so that on one hand, no energy consumption is caused, and on the other hand, environmental pollution is caused.
As shown in fig. 1, because the amount of the condensed water is limited, the outlet water temperature is also different, the waste heat utilization of the condensed water is difficult, and the secondary network is heated after heat exchange is performed through the plate heat exchanger in the existing condensed water waste heat utilization mode.
The principle of the existing waste heat system is as follows: the steam of the heat supply network enters a steam-water heat exchanger, condensed water with the temperature of about 70 ℃ is generated after heat exchange, and the condensed water is pumped into the plate heat exchanger through a condensed water pump after being collected by a condensed water tank. The secondary net backwater is firstly pumped into the plate heat exchanger through the heating main circulating pump to carry out primary section temperature rise, the secondary net heating circulating water is preheated, and then enters the steam-water heat exchanger to be reheated, so that the water supply temperature of the heat supply net is reached.
The problem of insufficient utilization of the waste heat of the condensed water, the existing condensed water recovery part adopts a plate type heat exchanger, and when the temperature of the condensed water is higher than the return water temperature of a secondary network, the waste heat of the condensed water can be recycled. When the temperature of the condensed water is close to or lower than the return water temperature of the secondary network, the plate heat exchanger cannot utilize the waste heat of the condensed water.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to the not enough of above-mentioned prior art, provide a novel steam condensate water waste heat recovery system for heating, the temperature of comdenstion water can be dropped to 25 degrees, furthest's the waste heat resource who utilizes the comdenstion water.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a novel steam condensate waste heat recovery system for heating, which comprises a steam-water heat exchanger and an absorption heat pump unit, wherein one side of the steam-water heat exchanger is connected with a steam-liquid separator in parallel through a first steel pipe and a third steel pipe respectively, and the other side of the steam-water heat exchanger is connected with a second steel pipe and a fourth steel pipe in parallel;
one side of the absorption heat pump unit is connected with a sixth steel pipe and a fifth steel pipe which are connected in parallel, one end, away from the absorption heat pump unit, of the sixth steel pipe is communicated with the second steel pipe, and one end, away from the absorption heat pump unit, of the fifth steel pipe is communicated with the third steel pipe.
Furthermore, a ninth steel pipe and a tenth steel pipe which are connected in parallel are connected to one side of the absorption heat pump unit, and one end, away from the absorption heat pump unit, of the ninth steel pipe is communicated with a condensate water tank; and one end of the tenth steel pipe, which is separated from the absorption heat pump unit, is communicated with the ninth steel pipe.
Furthermore, a seventh steel pipe and an eighth steel pipe are connected to the other side of the absorption heat pump unit in parallel, and one end, away from the absorption heat pump unit, of the seventh steel pipe is communicated with a heating secondary water return port; and one end of the eighth steel pipe, which is away from the absorption heat pump unit, is communicated with the seventh steel pipe.
Furthermore, one end of the second steel pipe, which is separated from the steam-water heat exchanger, is connected with a water supply port of a heating secondary network; one end, away from the steam-water heat exchanger, of the fourth steel pipe is communicated with a seventh steel pipe; and the second steel pipe is communicated with the seventh steel pipe through a fifteenth steel pipe.
Further, the third steel pipe is communicated with the condensed water phase through a fifth steel pipe; and the tenth steel pipe is communicated with the condensed water phase through a thirteenth steel pipe.
Further, the condensed water tank is communicated with the seventeenth steel pipe through a fourteenth steel pipe and a twelfth steel pipe respectively; and a water softener is arranged between the condensed water tank and the tap water inlet.
Further, a water replenishing pump is installed on the fourteenth steel pipe; a condensate water circulating pump is installed on the thirteenth steel pipe, and a secondary net circulating pump is sequentially installed on the seventh steel pipe; the twelfth steel pipe is provided with an electromagnetic valve; a bypass butterfly valve is arranged on each of the seventh steel pipe and the fifteenth steel pipe; a bypass stop valve is arranged on the tenth steel pipe; the first steel pipe and the sixth steel pipe are both provided with electric regulating valves; and the fifth steel pipe and the third steel pipe are both provided with drain valves.
Furthermore, the absorption heat pump unit comprises a generator, an absorber, an evaporator and a condenser, wherein the generator is connected with the absorber through a dilute absorption liquid pipe and a concentrated absorption liquid pipe which are connected in parallel; the absorber is connected with the condenser through a warm water pipe; the absorber is connected with the evaporator through a low-pressure condensation steam pipe; the evaporator is connected with the condenser through a refrigerant gas-liquid mixing pipe; the condenser is connected with the generator through a refrigerant steam pipe;
an absorption liquid pump is installed on the thin absorption liquid pipe, an adjusting valve is installed on the thick absorption liquid pipe, and a throttle valve is installed on the refrigerant gas-liquid mixing pipe;
the generator is respectively communicated with the driving heat source steam inlet and the high-temperature condensed water outlet; the absorber is communicated with a secondary net backwater inlet; the evaporator is respectively communicated with the high-temperature condensed water inlet and the low-temperature condensed water inlet; and the condenser is communicated with a secondary network backwater outlet.
The utility model has the advantages that: the absorption heat pump is adopted for recovering the waste heat of the condensed water, the temperature of the condensed water can be reduced to 25 ℃, the conventional heat exchange can be broken through, the temperature of the condensed water can only be close to 50 ℃ of the second network, and the waste heat resource of the condensed water is utilized to the maximum extent;
the absorption heat pump has small power consumption, the main power consumption is only a solution pump, and the electric power of a unit pump with 1MW rated heat supply is only 4 kW;
the absorption heat pump is adopted to return the waste heat of the condensed water, the outlet water temperature of the condensed water of the common shell-and-tube steam-water converter is 75 ℃, and the energy saving of the waste heat of the condensed water accounts for 8.71 percent. The outlet water temperature of the condensed water of the spiral winding pipe heat exchanger is lower, generally about 55 ℃, and the energy saving accounts for 5.23%;
the novel waste heat recovery system adopting the absorption heat pump only needs to supplement water to the system for the first time, low-temperature condensate water below 30 ℃ is used for later-stage operation, softened tap water is not needed for supplementing water, and the system operation cost is saved.
Drawings
FIG. 1 is a schematic structural diagram of a conventional condensate water waste heat utilization principle in the prior art;
fig. 2 is a schematic structural diagram of a novel steam condensate waste heat recovery system for heating according to the present invention;
figure 3 is a system schematic of an absorption heat pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 2, the novel steam condensate waste heat recovery system for heating comprises a steam-water heat exchanger 2 and an absorption heat pump unit 1, wherein one side of the steam-water heat exchanger 2 is connected in parallel with a steam-liquid separator 8 through a first steel pipe 11 and a third steel pipe 13 respectively, and the other side of the steam-water heat exchanger 2 is connected with a second steel pipe 12 and a fourth steel pipe 14 which are connected in parallel;
one side of the absorption heat pump unit 1 is connected with a sixth steel pipe 16 and a fifth steel pipe 15 which are connected in parallel, one end of the sixth steel pipe 16, which is away from the absorption heat pump unit 1, is communicated with the second steel pipe 12, and one end of the fifth steel pipe 15, which is away from the absorption heat pump unit 1, is communicated with the third steel pipe 13.
One side of the absorption heat pump unit 1 is also connected with a ninth steel pipe 19 and a tenth steel pipe 110 which are connected in parallel, and one end of the ninth steel pipe 19, which is away from the absorption heat pump unit 1, is communicated with a condensate water tank 3; one end of the tenth steel pipe 110, which is away from the absorption heat pump unit 1, is communicated with the ninth steel pipe 19.
The other side of the absorption heat pump unit 1 is connected with a seventh steel pipe 17 and an eighth steel pipe 18 in parallel, and one end, away from the absorption heat pump unit 1, of the seventh steel pipe 17 is communicated with a heating secondary water return port; one end of the eighth steel pipe 18, which is away from the absorption heat pump unit 1, is communicated with the seventh steel pipe 17.
One end of the second steel pipe 12, which is away from the steam-water heat exchanger 2, is connected with a water supply port of a heating secondary network; one end of the fourth steel pipe 14, which is away from the steam-water heat exchanger 2, is communicated with a seventh steel pipe 17; the second steel pipe 12 and the seventh steel pipe 17 communicate with each other through a fifteenth steel pipe 115.
The third steel pipe 13 is communicated with the condensed water phase 3 through a fifth steel pipe 15; the tenth steel pipe 110 is communicated with the condensed water phase 3 through a thirteenth steel pipe 113.
The condensed water tank 3 is communicated with the seventeenth steel pipe 117 through a fourteenth steel pipe 114 and a twelfth steel pipe 112, respectively; a water softener 4 is arranged between the condensed water tank 3 and the tap water inlet.
A water replenishing pump 7 is installed on the fourteenth steel pipe 114; a condensate water circulating pump 6 is installed on the thirteenth steel pipe 113, and a secondary net circulating pump 5 is sequentially installed on the seventh steel pipe 17; the twelfth steel pipe 112 is provided with an electromagnetic valve 130; a bypass butterfly valve 10 is mounted on each of the seventh steel pipe 17 and the fifteenth steel pipe 115; a bypass stop valve 811 is installed on the tenth steel pipe 110; the first steel pipe 11 and the sixth steel pipe 16 are both provided with an electric regulating valve 120; and the fifth steel pipe 15 and the third steel pipe 13 are both provided with a drain valve 9.
Referring to fig. 3, the absorption heat pump unit 1 includes a generator 105, an absorber 108, an evaporator 107 and a condenser 106, wherein the generator 105 is connected to the absorber 108 through a dilute absorption liquid pipe 208 and a concentrated absorption liquid pipe 204 connected in parallel; the absorber 108 is connected with the condenser 106 through a warm water pipe 202; the absorber 108 is connected with the evaporator 107 through a low-pressure condensation steam pipe 207; the evaporator 107 is connected with the condenser 106 through a refrigerant gas-liquid mixing pipe 206; the condenser 106 is connected to the generator 105 through a refrigerant steam pipe 203;
an absorption liquid pump 109 is installed on the thin absorption liquid pipe 208, an adjusting valve 201 is installed on the thick absorption liquid pipe 204, and a throttle valve 200 is installed on the refrigerant gas-liquid mixing pipe 206;
the generator 105 is respectively communicated with a driving heat source steam inlet and a high-temperature condensed water outlet; the absorber 108 is communicated with a secondary net backwater inlet; the evaporator 107 is respectively communicated with a high-temperature condensed water inlet and a low-temperature condensed water inlet; the condenser 106 is communicated with a secondary net backwater outlet.
The utility model provides a novel steam condensate water waste heat recovery system for heating, includes following flow:
superheated steam from a municipal pipe network passes through the steam-liquid separator 8 and the electric regulating valve 120, exchanges heat and condenses in the steam-water heat exchanger 2 and the absorption heat pump unit 1, joins condensed water from the steam-liquid separator 8 through the drain valve 9, and then enters the high-temperature water part of the condensed water tank 3;
high-temperature condensed water in the condensed water tank 3 is pumped into the absorption heat pump unit 1 through the condensed water circulating pump 6 to extract waste heat, then low-temperature condensed water enters the low-temperature water part of the condensed water tank 3, and the low-temperature condensed water in the condensed water tank 3 is pumped into a secondary pipe network of a heating system by using the water replenishing pump 7 to replenish water for the system;
the heating secondary network backwater enters the absorption heat pump unit 1 under the condition that the switching butterfly valve 10 is closed after passing through the secondary network circulating pump 5, absorbs a part of heat and then enters the steam-water heat exchanger 2 for continuous heat exchange to reach the water supply temperature of a secondary pipe network;
the water replenishing of the primary operation of the system is realized by a tap water pipe network, the water softener 4 enters the low-temperature part of the condensed water tank 3, and the water replenishing pump 7 is used for performing primary water replenishing on the secondary network of the system.
The operation process of the absorption heat pump unit 1 is as follows:
superheated steam from the municipal steam pipe network enters the generator 105 through the driving heat source steam inlet to heat the dilute absorption liquid, and the dilute absorption liquid absorbs heat and then separates refrigerant steam to become concentrated absorption liquid;
the concentrated absorption liquid enters the absorber 108 from the concentrated absorption liquid pipeline 204 through the regulating valve 201, the concentrated absorption liquid is changed into dilute absorption liquid after absorbing low-temperature refrigerant vapor in the absorber 108, and the dilute absorption liquid enters the generator 105 after passing through the absorption liquid pump 109 and the dilute absorption liquid pipeline 208, so that the absorption liquid circulation is completed;
high-temperature refrigerant steam generated from the generator 105 enters the condenser 106 through the high-temperature refrigerant steam pipeline 203, is thermally condensed into refrigerant liquid in the condenser 106, passes through the refrigerant liquid pipeline 205 and the throttle valve 200, enters the evaporator 107 through the refrigerant steam-liquid mixing pipeline 206, is completely evaporated in the evaporator 107 to become low-temperature refrigerant gas, and enters the absorber 108 through the low-pressure refrigerant steam pipe 207, so that refrigerant circulation is completed;
the secondary net backwater enters the absorber from a secondary net backwater inlet to absorb a part of heat, passes through the warm water pipe 202, enters the condenser 106 to absorb a part of heat, and finally warm water is discharged from a secondary net backwater outlet.
The absorption heat pump adopts water as a refrigerant and lithium bromide as an absorbent. The absorption heat pump driving part adopts a high-temperature heat source, only the solution pump consumes a small amount of power, and the absorption heat pump driving part is different from a common heat pump which adopts electric drive, and the power consumption is larger. The absorption heat pump unit system comprises a refrigerant cycle and a solution cycle:
refrigerant circulation: the heat source is driven to heat the generator, refrigerant steam generated in the generator is condensed into refrigerant water in the condenser, enters the evaporator through the U-shaped pipe and is evaporated under low pressure, and a refrigeration effect is generated.
Solution circulation: the concentrated solution flowing out of the generator is depressurized and then enters an absorber to absorb refrigerant steam generated by an evaporator to form a dilute solution, and the dilute solution is conveyed to the generator by a pump to be reheated to form the concentrated solution.
Advantage of waste heat recovery of absorption heat pump
The heating power of the absorption heat pump can be selected between 0.5-10 MW, and the absorption heat pump is mainly characterized in that:
1) the waste heat of the steam condensate is recovered, and the steam consumption is reduced;
2) the heating capacity of the steam heating network is increased;
3) the pipe diameter of the primary net is effectively reduced, and the investment is saved;
4) the heat of the steam heating network is used for driving the equipment to operate, so that the power consumption is reduced;
5) the low-grade condensate water can be recycled, and the water consumption of a secondary network is reduced;
6) the machine set has various types, and can meet different temperature and pressure requirements of hot users;
therefore, the absorption heat pump is adopted to recover the waste heat of the condensed water, thereby saving energy, reducing cost and improving economic benefit.
The waste heat recovery and heat supply system adopts a steam-driven absorption type lithium bromide heat pump unit as extraction equipment of waste heat resources. It can utilize the steam drive of municipal pipe network, retrieves low-grade heat energy and turns into high-quality heat energy.
Example one
The heat supply area of the heat supply reconstruction project of the industrial family area of a certain group company in Hubei is about 122474m239 houses, 1598 households. The condensed water of the original district heating system is directly discharged, and the absorption heat pump is added to recover the waste heat of the steam condensed water for district heating and heating system reductionThe steam consumption of (2).
The design parameters of the first-level steam net are 1.3MPa (g), 300 ℃, and the operation parameters are as follows: 0.6Mpa, 180 ℃;
the design temperature of the heating medium water supply and return of the secondary network is 75 ℃/50 ℃, and the design pressure is 0.9 MPa;
the heating area of the house is about 122474m2The total heat load is about 7348 kW.
A waste heat absorption heat pump is added, a main heat exchanger of the system adopts a spiral winding pipe heat exchanger, the design temperature of the effluent of condensed water is 55 ℃ according to the design working condition, and the condensed water of the heat exchanger of the system, the condensed water of a gas-liquid separator and the condensed water driven by the absorption heat pump are collected into a condensed water tank (the water tank can be used for water supplement of the system). And then, the condensed water with the temperature of 55 ℃ enters a heat pump unit for waste heat recovery, and the temperature of the condensed water is reduced to 25 ℃ to be used as secondary network water supplement.
The steam heat exchange principle is as follows: condensed water of about 55 ℃ pumped by a civil district central heating power station or an industrial heat exchange station, a steam-water heat exchanger (spiral wound pipe heat exchanger), a steam-water separator and an absorption heat pump which take steam as a heat source is collected in a condensed water tank and then enters an absorption heat pump unit to extract heat. And the temperature of the condensed water is reduced to below 25 ℃, and the condensed water is discharged to a system water replenishing tank to replenish water for a courtyard secondary pipe network.
The secondary network heat exchange principle: heating backwater at 50 ℃ of a secondary side pipe network of the steam heating station firstly enters an absorption heat pump unit to be heated to 54 ℃, and then enters a spiral winding pipe heat exchanger to be heated to 75 ℃.
The steam-water heat exchange station system comprises: the heat exchange part, the condensed water recovery part and the water replenishing part are arranged on the heat exchange part;
the heat exchange part comprises: the system comprises a steam-water heat exchanger, a steam-liquid separator, a circulating water pump, a pipeline valve and the like;
the condensate recovery part comprises: the plate heat exchanger, the condensate water tank, the condensate water pump and the pipeline valve;
the water replenishing part comprises: the water supply system comprises a full-automatic water softener, a water supply pump, a water supply pipeline, a valve and the like;
device model selection
1. Selecting absorption heat pump equipment:
1) steam consumption of heating system
The heating system has the following steam consumption: q. q.sx=11T/h
2) The heat extracted by the condensed water of the system is reduced from 55 ℃ to 25 ℃: qx=383.5kW
3) Selecting rated heat supply of the absorption unit:
the design heat supply of the unit: qe=1.15*Qs=1.15*(Qq+Qx)=1067kW
The rated heat supply of the absorption heat pump is selected to be 1MW according to the model selection manual.
The absorption heat pump adopts a small modular unit, and a steam side electromagnetic valve of the heat pump is adjusted according to the outlet temperature of the condensed water.
2. And (3) selecting a type of a condensate water tank:
the condensed water tank and the water replenishing tank of the system are shared. Design capacity of condensate tank:
Vl=0.5*qx=0.5h*11T/h=5.5T
the volume of the condensate water tank is selected to be 6m3Volume of low temperature zone 3m3High temperature zone volume 3m3The system water is overflowed from a bottom interface of the low-temperature area to the top of the high-temperature area; the absorption heat pump circulating water supplies water from a bottom connector of the high-temperature area, the heat pump water outlet is connected to the top of the low-temperature area, and the condensate water tank is provided with a low liquid level alarm.
3. And (3) selecting a condensate water circulating pump:
the condensed water circulation adopts a single-stage vertical circulating pump with the flow of the circulating pump being 11m3H, head 10mH2And O. And the minimum liquid level of the condensed water tank and the minimum temperature of the condensed water outlet of the absorption unit are controlled in an interlocking manner.
Comparison of waste heat recovery at different condensate temperatures
The efficiency of the condensate waste heat recovery absorption heat pump unit is different under different condensate water inlet temperatures, and the system condensate water temperatures are compared and analyzed under the conditions of 75 ℃, 65 ℃, 55 ℃ and 45 ℃:
TABLE 1 comparison of condensate heat recovery at different condensate outlet temperatures
Note: the above design parameters are calculated in consideration of the load factor of 70%. Residential heating is considered 24 hours a day, 90 days according to a heating season.
Economic benefits
According to the condensed water outlet temperature under four working conditions in the table 1, the economic benefits generated by the system are compared and analyzed, and the following table is shown:
TABLE 2 analysis of the economic benefits of waste heat utilization at different condensate water outlet temperatures
Note: the above design parameters are calculated in consideration of the load factor of 70%. Residential heating is considered 24 hours a day, 90 days according to a heating season.
According to the present case, the water outlet temperature of the spiral winding pipe heat exchanger is 55 ℃, the selected absorption heat pump unit has the rated heat supply load of 1MW, the manufacturing cost of the unit is about 30 ten thousand, and the sum of the manufacturing cost and the working load is 6m3The total investment of engineering energy-saving reconstruction of a condensate water tank and 2 condensate water circulating pumps of 0.75kW is about 45 ten thousand yuan. According to the calculation of 70% load rate, the annual saving steam cost is 39.15 ten thousand yuan, the heat pump system consumes 4.96 ten thousand yuan, and the investment recovery period of the whole system is 1.3 years.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (8)

1. The utility model provides a novel steam condensate water waste heat recovery system for heating which characterized in that: the absorption heat pump unit comprises a steam-water heat exchanger (2) and an absorption heat pump unit (1), wherein one side of the steam-water heat exchanger (2) is connected with a steam-liquid separator (8) in parallel through a first steel pipe (11) and a third steel pipe (13), and the other side of the steam-water heat exchanger (2) is connected with a second steel pipe (12) and a fourth steel pipe (14) in parallel;
one side of the absorption heat pump unit (1) is connected with a sixth steel pipe (16) and a fifth steel pipe (15) which are connected in parallel, one end, away from the absorption heat pump unit (1), of the sixth steel pipe (16) is communicated with the first steel pipe (11), and one end, away from the absorption heat pump unit (1), of the fifth steel pipe (15) is communicated with the third steel pipe (13).
2. The novel steam condensate waste heat recovery system for heating as claimed in claim 1, wherein: one side of the absorption heat pump unit (1) is also connected with a ninth steel pipe (19) and a tenth steel pipe (110) which are connected in parallel, and one end, away from the absorption heat pump unit (1), of the ninth steel pipe (19) is communicated with a condensate water tank (3); and one end of the tenth steel pipe (110), which is separated from the absorption heat pump unit (1), is communicated with the ninth steel pipe (19).
3. The novel steam condensate waste heat recovery system for heating as claimed in claim 2, wherein: the other side of the absorption heat pump unit (1) is connected with a seventh steel pipe (17) and an eighth steel pipe (18) in parallel, and one end, away from the absorption heat pump unit (1), of the seventh steel pipe (17) is communicated with a heating secondary water return port; and one end of the eighth steel pipe (18) away from the absorption heat pump unit (1) is communicated with the seventh steel pipe (17).
4. The novel steam condensate waste heat recovery system for heating as claimed in claim 3, wherein: one end of the second steel pipe (12) which is separated from the steam-water heat exchanger (2) is connected with a water supply port of a heating secondary network; one end of the fourth steel pipe (14), which is separated from the steam-water heat exchanger (2), is communicated with a seventh steel pipe (17); the second steel pipe (12) and the seventh steel pipe (17) are communicated through a fifteenth steel pipe (115).
5. The novel steam condensate waste heat recovery system for heating as claimed in claim 4, wherein: the third steel pipe (13) is communicated with the condensed water tank (3) through a fifth steel pipe (15); the tenth steel pipe (110) is communicated with the condensed water tank (3) through a thirteenth steel pipe (113).
6. The novel steam condensate waste heat recovery system for heating as claimed in claim 5, wherein: the condensed water tank (3) is communicated with a seventh steel pipe (17) through a fourteenth steel pipe (114) and a twelfth steel pipe (112) respectively; a water softener (4) is arranged between the condensed water tank (3) and the tap water inlet.
7. The novel steam condensate waste heat recovery system for heating as claimed in claim 6, wherein: a water replenishing pump (7) is installed on the fourteenth steel pipe (114); a condensate water circulating pump (6) is installed on the thirteenth steel pipe (113), and a secondary net circulating pump (5) is sequentially installed on the seventh steel pipe (17); an electromagnetic valve (130) is mounted on the twelfth steel pipe (112); a bypass butterfly valve (10) is mounted on each of the seventh steel pipe (17) and the fifteenth steel pipe (115); a bypass stop valve (811) is mounted on the tenth steel pipe (110); the first steel pipe (11) and the sixth steel pipe (16) are both provided with an electric regulating valve (120); and the fifth steel pipe (15) and the third steel pipe (13) are both provided with a drain valve (9).
8. The novel steam condensate waste heat recovery system for heating as claimed in claim 7, wherein: the absorption heat pump unit (1) comprises a generator (105), an absorber (108), an evaporator (107) and a condenser (106), wherein the generator (105) is connected with the absorber (108) through a dilute absorption liquid pipe (208) and a concentrated absorption liquid pipe (204) which are connected in parallel; the absorber (108) is connected with the condenser (106) through a warm water pipe (202); the absorber (108) is connected with the evaporator (107) through a low-pressure condensation steam pipe (207); the evaporator (107) is connected with the condenser (106) through a refrigerant gas-liquid mixing pipe (206); the condenser (106) is connected with the generator (105) through a refrigerant steam pipe (203);
an absorption liquid pump (109) is installed on the thin absorption liquid pipe (208), an adjusting valve (201) is installed on the thick absorption liquid pipe (204), and a throttle valve (200) is installed on the refrigerant gas-liquid mixing pipe (206);
the generator (105) is respectively communicated with a driving heat source steam inlet and a high-temperature condensed water outlet; the absorber (108) is communicated with a secondary net backwater inlet; the evaporator (107) is respectively communicated with the high-temperature condensed water inlet and the low-temperature condensed water inlet; the condenser (106) is communicated with a secondary net backwater outlet.
CN202022785947.1U 2020-11-27 2020-11-27 Novel steam condensate water waste heat recovery system for heating Active CN213983718U (en)

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CN202022785947.1U CN213983718U (en) 2020-11-27 2020-11-27 Novel steam condensate water waste heat recovery system for heating

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Application Number Priority Date Filing Date Title
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Publication Number Publication Date
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