CN215637692U - Fire-fighting water pool cold accumulation system of coal-fired power plant - Google Patents
Fire-fighting water pool cold accumulation system of coal-fired power plant Download PDFInfo
- Publication number
- CN215637692U CN215637692U CN202023054791.6U CN202023054791U CN215637692U CN 215637692 U CN215637692 U CN 215637692U CN 202023054791 U CN202023054791 U CN 202023054791U CN 215637692 U CN215637692 U CN 215637692U
- Authority
- CN
- China
- Prior art keywords
- cold
- temperature
- fire
- coal
- fired power
- 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.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000009825 accumulation Methods 0.000 title claims abstract description 39
- 238000010521 absorption reaction Methods 0.000 claims abstract description 51
- 238000005057 refrigeration Methods 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims description 14
- 239000000498 cooling water Substances 0.000 claims description 6
- 238000010248 power generation Methods 0.000 abstract description 3
- 238000010977 unit operation Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The utility model provides a fire pool cold accumulation system of a coal-fired power plant, which comprises absorption refrigeration equipment, a fan coil and a cold accumulation device, wherein the absorption refrigeration equipment is used for respectively providing cold sources for the cold accumulation equipment and the fan coil; a cold storage device for storing or releasing cold; the plate heat exchanger is used for exchanging heat of working media of the absorption refrigeration equipment and the cold accumulation equipment; and a control system for controlling the operation modes of the absorption refrigeration equipment and the cold storage equipment; the system fully utilizes the station fire-fighting water tank as a cold accumulation mechanism to form a set of flexible cold supply system for the office and living areas of the coal-fired power plant, realizes the decoupling of steam supply refrigeration and power generation of the coal-fired power generating set, and improves the cold supply flexibility and the unit operation economy of the coal-fired power plant.
Description
Technical Field
The utility model belongs to the field of cooling of coal-fired power plants, and particularly relates to a cold storage system of a fire pool of a coal-fired power plant.
Background
In recent years, with the continuous expansion of new energy grid-connected capacity and the continuous increase of the scale of a coal-fired power generating unit, the deep peak regulation and the start-stop peak regulation of the coal-fired power plant are gradually normalized, and the utilization hours of the coal-fired power plant continuously slide down, so that the coal-fired power generating unit runs under partial load for a long time except for a heat supply season, and the economic indexes such as plant power consumption and the like are deteriorated due to the high back pressure of the coal-fired power generating unit and the large air conditioning load of the coal-fired power plant in summer. Therefore, part of coal-fired power plants can improve the plant power rate index under the working condition in summer by using the absorption refrigeration equipment to replace the electric air conditioning equipment, and simultaneously, the economic efficiency of the unit is improved by using industrial steam extraction. However, after the absorption refrigeration equipment is modified, because of no energy storage system, the air conditioning cooling has to be interrupted under the conditions that the unit back pressure is close to the upper limit, the power generation amount needs to be improved, the industrial steam extraction is suspended and the like.
Disclosure of Invention
The utility model aims to provide a cold accumulation system of a fire pool of a coal-fired power plant, which overcomes the defects of cooling flexibility and unit operation economy of the existing recovery refrigeration equipment modified by the coal-fired power plant.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a fire pool cold accumulation system of a coal-fired power plant, which comprises absorption refrigeration equipment, a fan coil and a cold accumulation device, wherein the absorption refrigeration equipment is used for respectively providing cold sources for the cold accumulation equipment and the fan coil;
a cold storage device for storing or releasing cold;
the plate heat exchanger is used for exchanging heat of working media of the absorption refrigeration equipment and the cold accumulation equipment;
and a control system for controlling the operation modes of the absorption refrigeration equipment and the cold storage equipment.
Preferably, the absorption refrigeration equipment comprises an absorption refrigeration unit evaporator, a chilled water circulating pump and an electric three-way valve, wherein a cold air outlet of the absorption refrigeration unit evaporator is divided into two paths, and one path is connected with a cold air inlet of the plate heat exchanger; the other path of the air inlet is connected with an air inlet of a fan coil, and an air outlet of the fan coil is connected with an electric three-way valve through a chilled water circulating pump; one path of the electric three-way valve is connected with a cooling water inlet of the absorption refrigerating unit evaporator, and the other path of the electric three-way valve is connected with a cold air outlet of the absorption refrigerating unit evaporator.
Preferably, the cold air outlet of the absorption refrigerating unit evaporator is provided with an evaporator outlet electric valve.
Preferably, an electric bypass valve is arranged between a cold air outlet of the evaporator of the absorption refrigerating unit and an air inlet of the fan coil.
Preferably, the cold accumulation equipment comprises a fire-fighting water pool and a cold accumulation and discharge circulating pump, wherein a cooling water outlet of the plate type heat exchanger is connected with a water inlet of the fire-fighting water pool, and a water outlet of the fire-fighting water pool is connected with a cooling water inlet of the plate type heat exchanger through the cold accumulation and discharge circulating pump.
Preferably, a fire water electric valve is arranged at an outlet of the storage cold circulating pump.
Preferably, the control system comprises a controller and a data acquisition unit, wherein the data acquisition unit comprises a first thermocouple, a second thermocouple and a third thermocouple, wherein the first thermocouple is used for acquiring a first temperature at the outlet of the absorption refrigeration equipment and transmitting the acquired first temperature to the controller; the second thermocouple is used for collecting a second temperature at the inlet of the fan coil and transmitting the collected second temperature to the controller; the third thermocouple is used for collecting a third temperature at the outlet of the cold accumulation device and transmitting the collected third temperature to the controller; the controller is used for controlling the operation modes of the absorption refrigeration equipment and the cold accumulation equipment according to the received temperature value.
Preferably, when the first temperature is lower than the third temperature and the second temperature meets the cooling load requirement, the absorption refrigeration equipment starts to perform refrigeration operation and the cold accumulation equipment starts to perform cold accumulation operation; when the first temperature is greater than or equal to the third temperature and the second temperature does not meet the cooling load requirement, the absorption refrigeration equipment starts refrigeration work and the cold accumulation equipment starts cold release work; when the first temperature is invalid and the third temperature is valid, the cold accumulation equipment starts to cool; and when the third temperature is invalid and the first temperature is valid, the absorption refrigeration equipment starts to perform refrigeration work.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model relates to a cold storage system of a fire-fighting water pool of a coal-fired power plant, which fully utilizes the fire-fighting water pool of a plant as a cold storage mechanism to form a set of flexible cold supply system of office and living areas of the coal-fired power plant, realizes the decoupling of steam supply refrigeration and power generation of a coal-fired power generating set, and improves the cold supply flexibility and the unit operation economy of the coal-fired power plant.
Drawings
FIG. 1 is a schematic structural view of the present invention;
the system comprises an absorption refrigerating unit evaporator 2, a fire pool 3, a fan coil 4, a plate heat exchanger 5, an accumulation and discharge cold circulating pump 6, a chilled water circulating pump 7, an electric bypass valve 8, an electric three-way valve 9, an evaporator outlet electric valve 10, a fire water electric valve 11, a first thermocouple 12, a second thermocouple, a third thermocouple, and a fan coil.
Detailed Description
The present invention will be described in further detail below with reference to the accompanying drawings, but the present invention is not limited to the following examples.
As shown in fig. 1, the cold storage system for the fire-fighting water pool of the coal-fired power plant provided by the utility model comprises an absorption refrigerating unit evaporator 1, a fire-fighting water pool 2, a fan coil 3, a plate heat exchanger 4, a cold accumulation and discharge circulating pump 5, a chilled water circulating pump 6, an electric bypass valve 7, an electric three-way valve 8, an evaporator outlet electric valve 9 and a fire-fighting water electric valve 10, wherein a water distributor is arranged at the lower end of the inner cavity of the fire-fighting water pool 2, a water outlet of the water distributor is connected with a water inlet of the cold accumulation and discharge circulating pump 5, and a water outlet of the cold accumulation and discharge circulating pump 5 is connected with a fire-fighting water side inlet of the plate heat exchanger 4 through the fire-fighting water electric valve 10; and a fire water side outlet of the plate type heat exchanger 4 is connected with a water distributor arranged at the upper end of the inner cavity of the fire pool 2 through a pipeline.
The outlet of the chilled water side of the plate heat exchanger 4 is connected with the inlet of the fan coil 3, and the outlet of the fan coil 3 is connected with the electric three-way valve 8 through the chilled water circulating pump 6.
The outlet of the electric three-way valve 8 is divided into two paths, wherein one path of pipeline is connected with the water inlet of the absorption refrigerating unit evaporator 1, and the water outlet of the absorption refrigerating unit evaporator 1 is connected with the chilled water side inlet of the plate heat exchanger 4 through an electric valve 9 at the outlet of the evaporator; the other pipeline is connected with an outlet pipeline of the electric valve 9 at the outlet of the evaporator.
The plate heat exchanger 4 is further provided with a bypass pipeline, and an electric bypass valve 7 is arranged on the bypass pipeline.
A second thermocouple 12 is arranged at the outlet of the chilled water side of the plate heat exchanger 4; a first thermocouple 11 is arranged at an inlet of the freezing water side of the plate heat exchanger 4, and a third thermocouple 13 is arranged at an inlet of the fire-fighting water side of the plate heat exchanger 4.
The first thermocouple 11, the second thermocouple 12 and the third thermocouple 13 are all connected to a controller.
The first thermocouple 11 is used for collecting a first temperature at an inlet of the chilled water side of the plate heat exchanger 4 and transmitting the collected first temperature to the controller;
the second thermocouple 12 is used for acquiring a second temperature at an outlet of the chilled water side of the plate heat exchanger 4 and transmitting the acquired second temperature to the controller;
the third thermocouple 13 is used for collecting a third temperature at an inlet of the fire-fighting water side of the plate heat exchanger 4 and transmitting the collected third temperature to the controller;
the controller is used for processing the received temperature and controlling the cooling mode according to the processing result.
The working principle of the utility model is that the fire pool cold accumulation system of the coal-fired power plant has four operation modes:
the first operation mode is as follows: cold storage and absorption type refrigerating unit cold supply of fire pool
The logical condition for this mode of operation is that the first thermocouple 11 measurement is less than the third thermocouple 13 measurement and the chilled water temperature entering the fan coil 3 as measured by the second thermocouple 12 meets the cooling load demand. In this mode, the cold storage and discharge circulating pump 5 and the chilled water circulating pump 6 are put into operation, the electric bypass valve 7 is closed, the pipeline connecting the downstream of the electric three-way valve 8 with the absorption refrigerating unit evaporator 1 is opened, the other pipeline is closed, and the evaporator outlet electric valve 9 and the fire water electric valve 10 are opened. When the first thermocouple 11 measurement equals the third thermocouple 13 measurement, the system exits the operating mode and transitions to another operating mode.
And a second operation mode: cooling of fire pool cooling and absorption type refrigerating unit
The logical condition of the mode operation is that the measured value of the first thermocouple 11 is greater than or equal to the measured value of the third thermocouple 13, and the temperature of the chilled water entering the fan coil 3, measured by the second thermocouple 12, does not meet the cooling load requirement; in this mode, the cold storage and discharge circulating pump 5 and the chilled water circulating pump 6 are put into operation, the electric bypass valve 7 is closed, the pipeline connecting the downstream of the electric three-way valve 8 with the absorption refrigerating unit evaporator 1 is opened, the other pipeline is closed, and the evaporator outlet electric valve 9 and the fire water electric valve 10 are opened. When the first thermocouple 11 measurement equals the third thermocouple 13 measurement, the system exits the operating mode and transitions to another operating mode.
And a third operation mode: independent cooling of absorption refrigerating unit
When the measured value of the third thermocouple 13 is valid and the measured value of the first thermocouple 11 is invalid, in the mode, the cold storage and discharge circulating pump 5 stops running, the chilled water circulating pump 6 is put into operation, the electric bypass valve 7 is opened, the pipeline of the downstream of the electric three-way valve 8, which is connected with the absorption refrigerating unit evaporator 1, is opened, the other pipeline is closed, the electric valve 9 at the outlet of the evaporator is opened, and the electric valve 10 for fire water is closed.
And the operation mode is four: independent cooling of fire pool
When the measured value of the first thermocouple 11 is valid and the measured value of the third thermocouple 13 is invalid, the cold circulating pump 5 and the chilled water circulating pump 6 are put into operation in the mode, the electric bypass valve 7 is closed, the pipeline of the electric three-way valve 8 connected with the absorption refrigerating unit evaporator 1 at the downstream is closed, the other pipeline is opened, the electric valve 9 at the outlet of the evaporator is closed, and the electric valve 10 for fire water is opened.
The four operation modes are switched smoothly, and large fluctuation of system parameters is avoided. When the power of the coal-fired generator set is close to the rated power or the through-flow of the steam turbine set is close to the maximum under the instruction of the power grid AGC, the industrial steam extraction is quitted and cannot be used for the absorption type refrigerating unit to work, the system enters into a fourth operation mode, namely the fire pool is independently cooled, and the output of the coal-fired generator set is ensured to meet the requirement of the power grid under the peak load; when the coal-fired power generating unit is below 90% of rated load or the through flow of the steam turbine unit is below 90%, the industrial extraction steam is put into operation, the system enters an operation mode I or a mode II, and the output of the absorption refrigerating unit is adjusted according to the measured values of the three thermocouples of 10, 11 and 12, so that the refrigerating capacity meets the requirements of users, and the cold accumulation or cold discharge state of the fire-fighting water pool meets the requirements of optimized operation; when the fire pool is in emergency application, fire extinguishing, overhauling and maintenance conditions and the like, the system enters a third operation mode, namely the absorption refrigerating unit supplies cold independently.
The above description is provided for the purpose of illustration of the present invention and is not intended to limit the scope of the present invention, which is defined by the appended claims.
Claims (8)
1. A fire pool cold accumulation system of a coal-fired power plant is characterized by comprising absorption refrigeration equipment for respectively providing cold sources for cold accumulation equipment and a fan coil (3);
a cold storage device for storing or releasing cold;
the plate heat exchanger (4) is used for exchanging heat of working media of the absorption refrigeration equipment and the cold accumulation equipment;
and a control system for controlling the operation modes of the absorption refrigeration equipment and the cold storage equipment.
2. The fire pool cold accumulation system of the coal-fired power plant as claimed in claim 1, wherein the absorption refrigeration equipment comprises an absorption refrigeration unit evaporator (1), a chilled water circulating pump (6) and an electric three-way valve (8), wherein a cold air outlet of the absorption refrigeration unit evaporator (1) is divided into two paths, one path is connected with a cold air inlet of the plate heat exchanger (4); the other path of the air inlet is connected with an air inlet of a fan coil (3), and an air outlet of the fan coil (3) is connected with an electric three-way valve (8) through a chilled water circulating pump (6); one path of the electric three-way valve (8) is connected with a cooling water inlet of the absorption refrigerating unit evaporator (1), and the other path of the electric three-way valve is connected with a cold air outlet of the absorption refrigerating unit evaporator (1).
3. The cold storage system of the fire pool of the coal-fired power plant as recited in claim 2, wherein the cold air outlet of the absorption refrigerating unit evaporator (1) is provided with an evaporator outlet electric valve (9).
4. The fire pool cold accumulation system of the coal-fired power plant as claimed in claim 2, wherein an electric bypass valve (7) is arranged between the cold air outlet of the absorption refrigerating unit evaporator (1) and the air inlet of the fan coil (3).
5. The fire water pool cold accumulation system of the coal-fired power plant as recited in claim 1, wherein the cold accumulation device comprises a fire water pool (2) and a cold accumulation and discharge circulating pump (5), wherein a cooling water outlet of the plate heat exchanger (4) is connected with a water inlet of the fire water pool (2), and a water outlet of the fire water pool (2) is connected with a cooling water inlet of the plate heat exchanger (4) through the cold accumulation and discharge circulating pump (5).
6. The cold storage system of the fire pool of the coal-fired power plant as claimed in claim 5, wherein the outlet of the cold storage circulating pump (5) is provided with a fire water electric valve (10).
7. The fire pool cold storage system of claim 1, wherein the control system comprises a controller and a data acquisition unit, the data acquisition unit comprises a first thermocouple (11), a second thermocouple (12) and a third thermocouple (13), wherein the first thermocouple (11) is used for acquiring a first temperature at an outlet of the absorption refrigeration equipment and transmitting the acquired first temperature to the controller; the second thermocouple (12) is used for collecting a second temperature at the inlet of the fan coil (3) and transmitting the collected second temperature to the controller; the third thermocouple (13) is used for collecting a third temperature at the outlet of the cold storage device and transmitting the collected third temperature to the controller; the controller is used for controlling the operation modes of the absorption refrigeration equipment and the cold accumulation equipment according to the received temperature value.
8. The fire pool cold storage system of claim 7, wherein when the first temperature is less than the third temperature and the second temperature meets the cooling load requirement, the absorption refrigeration equipment starts the refrigeration operation and the cold storage equipment starts the cold storage operation; when the first temperature is greater than or equal to the third temperature and the second temperature does not meet the cooling load requirement, the absorption refrigeration equipment starts refrigeration work and the cold accumulation equipment starts cold release work; when the first temperature is invalid and the third temperature is valid, the cold accumulation equipment starts to cool; and when the third temperature is invalid and the first temperature is valid, the absorption refrigeration equipment starts to perform refrigeration work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023054791.6U CN215637692U (en) | 2020-12-16 | 2020-12-16 | Fire-fighting water pool cold accumulation system of coal-fired power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023054791.6U CN215637692U (en) | 2020-12-16 | 2020-12-16 | Fire-fighting water pool cold accumulation system of coal-fired power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215637692U true CN215637692U (en) | 2022-01-25 |
Family
ID=79887746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023054791.6U Expired - Fee Related CN215637692U (en) | 2020-12-16 | 2020-12-16 | Fire-fighting water pool cold accumulation system of coal-fired power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215637692U (en) |
-
2020
- 2020-12-16 CN CN202023054791.6U patent/CN215637692U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10001326B2 (en) | Electric power peak-shaving and combined heat and power waste heat recovery device and operation method thereof | |
| CN208382436U (en) | A kind of IDC computer room natural cooling source and electric cooling couple cold supply system | |
| CN203586628U (en) | Cooling tower natural cooling system for chilled water system | |
| CN110567024A (en) | Solar valley electricity energy storage heat supply heating system | |
| CN204630141U (en) | A kind of phase-changing energy-storing multiple source heat pump assembly | |
| CN202692337U (en) | Follow-up energy-saving management control system for load of central air conditioner of electrical power system | |
| CN112832961B (en) | Pneumatic deicing system for blades of wind turbine generator and working method of pneumatic deicing system | |
| CN106969452A (en) | A kind of air conditioner water cold accumulation system | |
| CN201803419U (en) | Integrated type multi-connected cold and hot source central air-conditioning system | |
| CN215637692U (en) | Fire-fighting water pool cold accumulation system of coal-fired power plant | |
| CN201028702Y (en) | Low-energy consumption lithium bromide central refrigerating equipment | |
| CN201935316U (en) | Automatic compensation group control system for ground source heat pump | |
| CN214581900U (en) | Air conditioner cold and heat source system for gas turbine power plant | |
| CN211695490U (en) | Combined configuration structure of cold and heat sources of centralized refrigeration and heating system of power plant | |
| CN204063424U (en) | Commercial Complex air conditioner energy source recovery system | |
| CN208688027U (en) | A kind of refrigeration heating system coupling gas heating function | |
| CN201259287Y (en) | Cold storage air conditioner system for enhancing cold-storage density | |
| CN201954838U (en) | Air-cooling cold and hot water module unit with heat recovery function | |
| CN202013062U (en) | Secondary heat exchange cool storage system for cooling water for production technology | |
| CN200972201Y (en) | Heat and cold supply equipment | |
| CN217011533U (en) | Comprehensive energy cooling and heating system based on data center waste heat utilization | |
| CN203671980U (en) | Industrial air-cooled frequency-conversion parallel type water chilling unit | |
| CN204902082U (en) | Central air conditioning water cold -storage system | |
| CN214035888U (en) | Device for controlling air inlet temperature of gas turbine | |
| CN216384666U (en) | Distributed energy cascade refrigeration system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |