CN214469446U - Absorption heat pump waste heat recovery device driven by auxiliary steam - Google Patents
Absorption heat pump waste heat recovery device driven by auxiliary steam Download PDFInfo
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- CN214469446U CN214469446U CN202120251191.4U CN202120251191U CN214469446U CN 214469446 U CN214469446 U CN 214469446U CN 202120251191 U CN202120251191 U CN 202120251191U CN 214469446 U CN214469446 U CN 214469446U
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Abstract
The utility model discloses an utilize auxiliary steam driven absorption heat pump waste heat recovery device, including auxiliary steam pipeline, absorption heat pump generator, absorption heat pump absorber, absorption heat pump evaporimeter, absorption heat pump condenser, solution heat exchanger, shell and tube type heat exchanger, condenser, lubricating oil cooler, sealed oil cooler, the utility model discloses an auxiliary steam retrieves lubricating oil and sealed oil system oil return waste heat as the drive heat source, is used for heating the raw water system with the heat that obtains, and the unit has higher economic nature.
Description
Technical Field
The utility model relates to a waste heat recovery of power plant utilizes technical field, in particular to utilize auxiliary steam driven absorption heat pump waste heat recovery device.
Background
The lubricating oil system provides sufficient and stable lubricating oil with proper pressure and temperature for lubricating and cooling components such as a steam turbine, a generator, a steam turbine bearing, a turning gear and the like, and absorbs heat generated by each component, so that each component works within an allowable temperature range, and the unit is ensured to run safely and reliably. The sealing oil system provides a stable pressure oil source for the sealing tile, prevents pressure gas in the generator from escaping along the rotating shaft on one hand, and lubricates and cools the sealing tile on the other hand. The heat carried by the return oil of the lubricating oil and the sealing oil is cooled by a closed water system, so that the heat is lost. How to utilize the heat of a low-grade heat source is an important subject for waste heat utilization and efficiency improvement of a power plant.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide an utilize auxiliary steam driven absorption heat pump waste heat recovery device adopts auxiliary steam as the drive heat source, retrieves lubricating oil and sealing oil return waste heat, gives the heat transfer to raw water heating system, and unit economy is higher.
In order to realize the purpose, the utility model discloses a technical scheme is:
an absorption heat pump waste heat recovery device driven by auxiliary steam comprises an auxiliary steam pipeline 1, wherein an outlet of the auxiliary steam pipeline 1 is communicated with a driving heat source inlet of an absorption heat pump generator 2, a driving heat source outlet of the absorption heat pump generator 2 is communicated with a driving heat source inlet of a shell-and-tube heat exchanger 7, and a driving heat source outlet of the shell-and-tube heat exchanger 7 is communicated with an inlet of a condenser 8 through a drain pipeline;
the steam outlet of the absorption heat pump generator 2 is connected with the steam inlet of the absorption heat pump condenser 5, the steam outlet of the absorption heat pump condenser 5 is connected with the steam inlet of the absorption heat pump evaporator 4, the steam outlet of the absorption heat pump evaporator 4 is connected with the steam inlet of the absorption heat pump absorber 3, and the steam outlet of the absorption heat pump absorber 3 is connected with the steam inlet of the absorption heat pump generator 2;
the circulating working medium outlet of the absorption heat pump absorber 3 is connected with the circulating working medium inlet of the absorption heat pump generator 2, the circulating working medium outlet of the absorption heat pump generator 2 is connected with the circulating working medium inlet of the absorption heat pump absorber 3, and heat exchange is carried out between the two pipelines through the solution heat exchanger 6;
the absorption heat pump absorber 3 is provided with a raw water inlet, raw water enters from the raw water inlet, the raw water outlet of the absorption heat pump absorber 3 is connected with the raw water inlet of the absorption heat pump condenser 5, the raw water outlet of the absorption heat pump condenser 5 is connected with the raw water inlet of the shell-and-tube heat exchanger 7, and the raw water outlet of the shell-and-tube heat exchanger 7 is sent to a chemical water treatment workshop.
The heat source water inlet of the absorption heat pump evaporator 4 is connected with the water outlet of the lubricating oil cooler 9, the inlet of the lubricating oil cooler 9 is connected with the closed water supply main pipe, the heat source water inlet of the absorption heat pump evaporator 4 is connected with the water outlet of the sealed oil cooler 10, the water inlet of the sealed oil cooler 10 is connected with the closed water supply main pipe, and the heat source water outlet of the absorption heat pump evaporator 4 is connected with the closed water return pipe.
A water inlet stop valve 17 is arranged on the closed water inlet pipeline, and a water return stop valve 18 is arranged on the closed water return pipeline; the closed water inlet pipeline is connected with the closed water return pipeline through a bypass regulating valve 19; the drain pipeline is provided with a drain regulating valve 20.
The steam outlet of the absorption heat pump condenser 5 is connected with the steam inlet of the absorption heat pump evaporator 4 through a throttle valve 16; a solution pump 15 is arranged between the circulating working medium outlet of the absorption heat pump absorber 3 and the circulating working medium inlet of the absorption heat pump generator 2, and the circulating working medium outlet of the absorption heat pump generator 2 is connected with the circulating working medium inlet of the absorption heat pump absorber 3 through a solution valve 14.
The auxiliary steam header 1 is connected with the absorption heat pump generator 2 through an air inlet adjusting valve 11.
The auxiliary steam header 1 is communicated with the shell-and-tube heat exchanger 7 through a heat exchanger heat source air inlet regulating valve 21, a raw water bypass regulating valve 22 is arranged between the raw water bypass and the shell-and-tube heat exchanger 7, and the raw water bypass is communicated with a raw water outlet of the shell-and-tube heat exchanger through a heat exchanger raw water bypass regulating valve 23.
An operation method of an absorption heat pump waste heat recovery device driven by auxiliary steam comprises the following steps;
a. in the unit starting stage, firstly putting the closed water and raw water system into operation, closing the closed water inlet stop valve 17, opening the closed water bypass regulating valve 19, closing the raw water inlet regulating valve 12, opening the raw water bypass regulating valve 22 and opening the raw water bypass regulating valve 23 of the heat exchanger;
b. when the load of the unit rises and the return oil temperature of the lubricating oil and the sealing oil obviously rises, closing the closed water bypass regulating valve 19, opening the closed water inlet stop valve 17 and the closed water outlet stop valve 18, closing the raw water bypass regulating valve 22 and the heat exchanger raw water bypass regulating valve 23, and opening the raw water inlet regulating valve 12; starting a generator steam inlet regulating valve 11, driving steam to enter an absorption heat pump generator, and enabling an absorption heat pump system to enter a working state;
c. when the system is in an emergency accident state, closing the generator steam inlet regulating valve 11, closing the raw water inlet regulating valve 12 and the closed water inlet stop valve 17, and completing the shutdown operation of the absorption heat pump system;
d. in a maintenance state, the driving heat source system is isolated through the generator steam inlet regulating valve 11 and the drain regulating valve 20; the isolation of the closed water system is completed through a closed water inlet stop valve 17 and a closed water return stop valve 18; the raw water system is isolated through a raw water inlet regulating valve 12 and a raw water outlet stop valve 13; at the moment, if the raw water needs to be heated, the heat exchanger heat source air inlet regulating valve 21 is opened, the raw water bypass regulating valve 22 is opened, the heat exchanger raw water bypass regulating valve 23 is closed, and the raw water can be heated through the shell-and-tube heat exchanger 7.
The utility model has the advantages that:
the utility model discloses when concrete operation, adopt supplementary steam drive absorption heat pump, retrieve lubricating oil and sealed oily waste heat, send the heat that obtains to raw water heating system and carry out primary heating to raw water, the high temperature saturated water after supplementary steam is exothermic carries out the secondary heating to raw water in shell-and-tube heat exchanger, realizes the recycle of lubricating oil and sealed oily waste heat, has saved the fuel consumption of power plant, and the economic nature and the feature of environmental protection of unit are showing and are improving.
Part of heat of the closed water system is used for heating raw water, so that the heat dissipation load of the open water system is reduced, the return water temperature of circulating water is reduced, the evaporation loss and the drift loss of water are reduced when the cooling tower cools, and the water consumption is saved.
The control method of the system not only considers the commissioning steps and the control strategy of the system when the unit is normally started, but also provides the control strategy of the system in an accident state and a maintenance state of the unit. The system control mode is flexible and simple, the operation is easy, and the system can be operated in an intervention mode at the first time especially under the accident condition.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is an auxiliary steam header, 2 is an absorption heat pump generator, 3 is an absorption heat pump absorber, 4 is an absorption heat pump evaporator, 5 is an absorption heat pump condenser, 6 is a solution heat exchanger, 7 is a shell-and-tube heat exchanger, 8 is a condenser, 9 is a lubricating oil cooler, 10 is a sealed oil cooler, 11 is an auxiliary steam inlet regulating valve, 12 is a raw water inlet regulating valve, 13 is a raw water outlet regulating valve, 14 is a circulating working medium regulating valve, 15 is a solution pump, 16 is a throttle valve, 17 is a closed water inlet stop valve, 18 is a closed water outlet stop valve, 19 is a closed water bypass regulating valve, 20 is a hydrophobic regulating valve, 21 is a heat exchanger heat source inlet regulating valve, 22 is a raw water bypass regulating valve, and 23 is a heat exchanger raw water bypass regulating valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the auxiliary steam driven absorption heat pump waste heat recovery device of the present invention includes an auxiliary steam header 1, an absorption heat pump generator 2, an absorption heat pump absorber 3, an absorption heat pump evaporator 4, an absorption heat pump condenser 5, a solution heat exchanger 6, a shell-and-tube heat exchanger 7, a condenser 8, a lubricating oil cooler 9, and a sealed oil cooler 10; an outlet of the auxiliary steam pipeline 1 is communicated with a driving heat source inlet of the absorption heat pump generator 2, a driving heat source outlet of the absorption heat pump generator 2 is communicated with a driving heat source inlet of the shell-and-tube heat exchanger 7, and a driving heat source outlet of the shell-and-tube heat exchanger 7 is communicated with an inlet of the condenser 8 through a drain pipeline; a steam outlet of the absorption heat pump generator 2 is connected with a steam inlet of an absorption heat pump condenser 5, a steam outlet of the absorption heat pump condenser 5 is connected with a steam inlet of an absorption heat pump evaporator 4, a steam outlet of the absorption heat pump evaporator 4 is connected with a steam inlet of an absorption heat pump absorber 3, and a steam outlet of the absorption heat pump absorber 3 is connected with a steam inlet of the absorption heat pump generator 2; a circulating working medium outlet of the absorption heat pump absorber 3 is connected with a circulating working medium inlet of the absorption heat pump generator 2, a circulating working medium outlet of the absorption heat pump generator 2 is connected with a circulating working medium inlet of the absorption heat pump absorber 3, and heat exchange is carried out between the two pipelines through a solution heat exchanger 6; raw water enters from a raw water inlet of an absorption heat pump absorber 3, a raw water outlet of the absorption heat pump absorber 3 is connected with a raw water inlet of an absorption heat pump condenser 5, a raw water outlet of the absorption heat pump condenser 5 is connected with a raw water inlet of a shell-and-tube heat exchanger 7, and a raw water outlet of the shell-and-tube heat exchanger 7 is sent to a chemical water treatment workshop;
an inlet of a lubricating oil cooler 9 is connected with a closed water supply main pipe, a water outlet of the lubricating oil cooler 9 is connected with a heat source water inlet of an absorption heat pump evaporator 4, a water inlet of a sealed oil cooler 10 is connected with the closed water supply main pipe, a water outlet of the sealed oil cooler 10 is connected with a heat source water inlet of the absorption heat pump evaporator 4, and a heat source water outlet of the absorption heat pump evaporator 4 is connected with a closed water return pipeline;
the auxiliary steam header 1 is communicated with the shell-and-tube heat exchanger 7 through a heat exchanger heat source air inlet regulating valve 21, a raw water bypass regulating valve 22 is arranged between the raw water bypass and the shell-and-tube heat exchanger 7, and the raw water bypass is communicated with a raw water outlet of the shell-and-tube heat exchanger through a heat exchanger raw water bypass regulating valve 23;
the auxiliary steam header 1 is connected with the absorption heat pump generator 2 through an air inlet adjusting valve 11; the steam outlet of the absorption heat pump condenser 5 is connected with the steam inlet of the absorption heat pump evaporator 4 through a throttle valve 16; a solution pump 15 is arranged between the circulating working medium outlet of the absorption heat pump absorber 3 and the circulating working medium inlet of the absorption heat pump generator 2, and the circulating working medium outlet of the absorption heat pump generator 2 is connected with the circulating working medium inlet of the absorption heat pump absorber 3 through a solution valve 14; a water inlet stop valve 17 is arranged on the closed water inlet pipeline, and a water return stop valve 18 is arranged on the closed water return pipeline; the closed water inlet pipeline is connected with the closed water return pipeline through a bypass regulating valve 19; the drain pipeline is provided with a drain regulating valve 20.
The waste heat recovery method of the absorption heat pump driven by auxiliary steam comprises the following steps:
a. at the unit start-up stage, drop into closed water and the operation of raw water system earlier, closed water stop valve 17 that intakes this moment, and closed water bypass governing valve 19 opens, and raw water intake governing valve 12 closes, and raw water bypass governing valve 22 opens, and heat exchanger raw water bypass governing valve 23 opens.
b. When the load of the unit rises and the return oil temperature of the lubricating oil and the sealing oil obviously rises, closing the closed water bypass regulating valve 19, opening the closed water inlet stop valve 17 and the closed water outlet stop valve 18, closing the raw water bypass regulating valve 22 and the heat exchanger raw water bypass regulating valve 23, and opening the raw water inlet regulating valve 12; and opening a generator steam inlet regulating valve 11 to drive steam to enter the absorption heat pump generator, and enabling the absorption heat pump system to enter a working state.
c. And in the emergency accident state of the system, the generator steam inlet regulating valve 11 is closed, the raw water inlet regulating valve 12 and the closed water inlet stop valve 17 are closed, and the operation stop of the absorption heat pump system is completed.
d. In a maintenance state, the driving heat source system is isolated through the generator steam inlet regulating valve 11 and the drain regulating valve 20; the isolation of the closed water system is completed through a closed water inlet stop valve 17 and a closed water return stop valve 18; the raw water system is isolated by a raw water inlet regulating valve 12 and a raw water outlet stop valve 13. At the moment, if the raw water needs to be heated, the heat exchanger heat source air inlet regulating valve 21 is opened, the raw water bypass regulating valve 22 is opened, the heat exchanger raw water bypass regulating valve 23 is closed, and the raw water can be heated through the shell-and-tube heat exchanger 7.
The utility model discloses both can be used to newly-built unit, also can be used to present unit transformation, assist vapour flow and closed discharge through the change, all can the steady operation when unit load change or ambient temperature change.
Claims (6)
1. The absorption heat pump waste heat recovery device driven by auxiliary steam is characterized by comprising an auxiliary steam pipeline (1), wherein an outlet of the auxiliary steam pipeline (1) is communicated with a driving heat source inlet of an absorption heat pump generator (2), a driving heat source outlet of the absorption heat pump generator (2) is communicated with a driving heat source inlet of a shell-and-tube heat exchanger (7), and a driving heat source outlet of the shell-and-tube heat exchanger (7) is communicated with an inlet of a condenser (8) through a drain pipeline;
the steam outlet of the absorption heat pump generator (2) is connected with the steam inlet of the absorption heat pump condenser (5), the steam outlet of the absorption heat pump condenser (5) is connected with the steam inlet of the absorption heat pump evaporator (4), the steam outlet of the absorption heat pump evaporator (4) is connected with the steam inlet of the absorption heat pump absorber (3), and the steam outlet of the absorption heat pump absorber (3) is connected with the steam inlet of the absorption heat pump generator (2);
a circulating working medium outlet of the absorption heat pump absorber (3) is connected with a circulating working medium inlet of the absorption heat pump generator (2), a circulating working medium outlet of the absorption heat pump generator (2) is connected with a circulating working medium inlet of the absorption heat pump absorber (3), and heat exchange is carried out between the two pipelines through a solution heat exchanger (6);
the absorption heat pump absorber (3) is provided with a raw water inlet, raw water enters from the raw water inlet, a raw water outlet of the absorption heat pump absorber (3) is connected with a raw water inlet of the absorption heat pump condenser (5), a raw water outlet of the absorption heat pump condenser (5) is connected with a raw water inlet of the shell-and-tube heat exchanger (7), and a raw water outlet of the shell-and-tube heat exchanger (7) is sent to a chemical water treatment workshop.
2. The absorption heat pump waste heat recovery device driven by auxiliary steam as claimed in claim 1, wherein the heat source water inlet of the absorption heat pump evaporator (4) is connected with the water outlet of the lubricating oil cooler (9), the inlet of the lubricating oil cooler (9) is connected with the closed water supply main pipe, the heat source water inlet of the absorption heat pump evaporator (4) is connected with the water outlet of the sealed oil cooler (10), the water inlet of the sealed oil cooler (10) is connected with the closed water supply main pipe, and the heat source water outlet of the absorption heat pump evaporator (4) is connected with the closed water return pipe.
3. The waste heat recovery device of the absorption heat pump driven by auxiliary steam as claimed in claim 2, wherein the closed water inlet pipeline is provided with a water inlet stop valve (17), and the closed water return pipeline is provided with a water return stop valve (18); the closed water inlet pipeline is connected with the closed water return pipeline through a bypass regulating valve (19); the drain pipeline is provided with a drain regulating valve (20).
4. An absorption heat pump waste heat recovery device driven by auxiliary steam according to claim 1, wherein the steam outlet of the absorption heat pump condenser (5) is connected with the steam inlet of the absorption heat pump evaporator (4) through a throttle valve (16); a solution pump (15) is arranged between the circulating working medium outlet of the absorption heat pump absorber (3) and the circulating working medium inlet of the absorption heat pump generator (2), and the circulating working medium outlet of the absorption heat pump generator (2) is connected with the circulating working medium inlet of the absorption heat pump absorber (3) through a solution valve (14).
5. The absorption heat pump waste heat recovery device driven by auxiliary steam as claimed in claim 1, wherein the auxiliary steam pipeline (1) is connected with the absorption heat pump generator (2) through an air inlet adjusting valve (11).
6. The absorption heat pump waste heat recovery device driven by auxiliary steam as claimed in claim 1, wherein the auxiliary steam pipeline (1) is communicated with the shell-and-tube heat exchanger (7) through a heat exchanger heat source air inlet regulating valve (21), a raw water bypass regulating valve (22) is arranged between the raw water bypass and the shell-and-tube heat exchanger (7), and the raw water bypass is communicated with the raw water outlet of the shell-and-tube heat exchanger through a heat exchanger raw water bypass regulating valve (23).
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| CN202120251191.4U CN214469446U (en) | 2021-01-28 | 2021-01-28 | Absorption heat pump waste heat recovery device driven by auxiliary steam |
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| CN202120251191.4U CN214469446U (en) | 2021-01-28 | 2021-01-28 | Absorption heat pump waste heat recovery device driven by auxiliary steam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762637A (en) * | 2021-01-28 | 2021-05-07 | 西安热工研究院有限公司 | Absorption heat pump waste heat recovery device and method driven by auxiliary steam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112762637A (en) * | 2021-01-28 | 2021-05-07 | 西安热工研究院有限公司 | Absorption heat pump waste heat recovery device and method driven by auxiliary steam |
| CN112762637B (en) * | 2021-01-28 | 2024-02-20 | 西安热工研究院有限公司 | Absorption heat pump waste heat recovery device and method driven by auxiliary steam |
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