CN113154417A - Ash bucket ash storage gasification air heating system with ejection steam extraction as heat source - Google Patents
Ash bucket ash storage gasification air heating system with ejection steam extraction as heat source Download PDFInfo
- Publication number
- CN113154417A CN113154417A CN202110471900.4A CN202110471900A CN113154417A CN 113154417 A CN113154417 A CN 113154417A CN 202110471900 A CN202110471900 A CN 202110471900A CN 113154417 A CN113154417 A CN 113154417A
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- China
- Prior art keywords
- ash
- steam
- heating system
- heat exchanger
- gasification
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- 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.)
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Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 52
- 238000000605 extraction Methods 0.000 title claims abstract description 20
- 238000002309 gasification Methods 0.000 title claims description 51
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000005485 electric heating Methods 0.000 abstract description 3
- 239000002956 ash Substances 0.000 description 101
- 239000010881 fly ash Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/02—Apparatus for removing ash, clinker, or slag from ash-pits, e.g. by employing trucks or conveyors, by employing suction devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F26B3/082—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed arrangements of devices for distributing fluidising gas, e.g. grids, nozzles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses an ash bucket and ash storage gasified air heating system taking injection extraction steam as a heat source, which comprises an ash bucket gasified air heating system, an ash storage gasified air heating system and an injection steam heating system, wherein the ash bucket gasified air heating system and the ash storage gasified air heating system are respectively connected with the injection steam heating system through an ash bucket steam-air heat exchanger and an ash storage steam-air heat exchanger. The invention effectively reduces the loss of the cold end of the system by injecting the low-grade steam through the high-grade steam, avoids an electric heating system required by the ash hopper, can effectively reduce the energy consumption, has good safety and moderate operation and investment cost, and has good application prospect.
Description
Technical Field
The invention belongs to the technical field of industrial waste gas purification and environmental protection, and relates to an ash bucket ash storage gasification air heating system taking injection extraction steam as a heat source.
Background
Coal-fired power generation mainly uses pulverized coal combustion to heat steam to drive a steam turbine to do work and generate power. Harmful pollutants such as dust, nitric oxide, sulfur dioxide and the like can be generated in the combustion process, wherein the dust is mainly removed by separating fly ash from gas through an electric dust collector or a cloth bag, the separated fly ash falls into an ash bucket at the lower part of the dust collector for collection, the fly ash collected by the ash bucket is conveyed to an ash silo for short-term storage, and then the fly ash is conveyed to an ash yard.
The ash bucket and the ash storehouse are funnel-shaped, gasification air needs to be blown into the ash bucket and the ash storehouse to ensure that ash is always in a fluidized state, and the fluidity of the ash is increased under the driving of the gasification air so that the ash can be smoothly discharged from the ash bucket or the ash storehouse.
When the temperature of the ash bucket or the ash storehouse is lower than the dew point temperature, the fly ash can be affected with damp and hardened, so that the fly ash can be blown into the ash bucket or the ash storehouse after gasification air is heated. For a 300MW unit, the heating power of the ash hopper and the ash storehouse gasification air is about 125kW, the heating of the existing ash hopper or the ash storehouse gasification air is mainly carried out by adopting an electric heating mode, the whole system is flexibly and reliably arranged, but the technology has higher energy consumption and higher operation cost.
Disclosure of Invention
The invention aims to provide an ash bucket ash storehouse gasification air heating system taking ejection steam extraction as a heat source, which has the characteristics of low energy consumption and good safety.
The technical scheme adopted by the invention is that the ash bucket and ash storage gasified air heating system with ejection steam extraction as a heat source comprises an ash bucket gasified air heating system, an ash storage gasified air heating system and an ejection steam heating system, wherein the ash bucket gasified air heating system and the ash storage gasified air heating system are respectively connected with the ejection steam heating system through an ash bucket steam-air heat exchanger and an ash storage steam-air heat exchanger.
The invention is also characterized in that:
the injection steam heating system comprises an injector, one end of the injector is connected with a boiler and a steam turbine, the other end of the injector is connected with an ash bucket steam-air heat exchanger and an ash storehouse steam-air heat exchanger, the boiler is connected with the injector, the other end of the boiler is connected with the steam turbine, the other end of the boiler is connected with one end of a water supply pump, the other end of the water supply pump is connected with one end of a condenser, and the other end of the condenser is connected with the steam turbine.
The ash bucket gasification air heating system comprises an ash bucket gasification fan, an ash bucket steam-air heat exchanger and an ash bucket which are sequentially connected, and the ash bucket steam-air heat exchanger is also connected with a condenser.
The ash storehouse gasification air heating system comprises an ash storehouse gasification fan, an ash storehouse steam-air heat exchanger and an ash storehouse which are sequentially connected, and the ash storehouse steam-air heat exchanger is also connected with a pipeline between the ash bucket steam-air heat exchanger and the condenser.
And a high-pressure steam valve and a low-pressure steam valve are respectively arranged on pipelines between the ejector and the boiler and between the ejector and the steam turbine.
And mixed steam valves are arranged on pipelines between the ejector and the ash bucket steam-air heat exchanger and between the ejector and the ash storehouse steam-air heat exchanger.
An ash bucket gasification air door is arranged on a pipeline between the ash bucket gasification fan and the ash bucket steam-air heat exchanger.
An ash storage gasification air door is arranged on a pipeline between the ash storage gasification fan and the ash storage steam-air heat exchanger.
The invention has the beneficial effects that: compared with other heating methods, the method provided by the invention has the advantages that the low-grade steam is injected through the high-grade steam, the loss of the cold end of the system is effectively reduced, meanwhile, an electric heating system required by the ash hopper heating is avoided, the energy consumption can be effectively reduced, the safety is moderate, the operation and investment cost are high, and the application prospect is good.
Drawings
FIG. 1 is a schematic structural diagram of an ash bin gasification air heating system with an ejection steam extraction as a heat source.
In the figure, 1, an ejector, 2, a high-pressure steam valve, 3, a low-pressure steam valve, 4, a mixed steam valve, 5, an ash bucket steam-air heat exchanger, 6, an ash bin steam-air heat exchanger, 7, a condenser, 8, a water supply pump, 9, a boiler, 10, a steam turbine, 11, an ash bucket gasification fan, 12, an ash bucket gasification air door, 13, an ash bucket, 14, an ash bin gasification fan, 15, an ash bin gasification air door and 16, an ash bin.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to an ash bucket and ash storage gasified air heating system taking injection extraction steam as a heat source, which comprises an ash bucket gasified air heating system, an ash storage gasified air heating system and an injection steam heating system as shown in figure 1, wherein the ash bucket gasified air heating system and the ash storage gasified air heating system are respectively connected with the injection steam heating system through an ash bucket steam-air heat exchanger 5 and an ash storage steam-air heat exchanger 6;
the injection steam heating system comprises an injector 1, one end of the injector 1 is connected with a boiler 9 and a steam turbine 10, the other end of the injector is connected with an ash bucket steam-air heat exchanger 5 and an ash storehouse steam-air heat exchanger 6, one end of the boiler 9, which is connected with the injector 1, is also connected with the steam turbine 10, the other end of the boiler 9 is connected with one end of a water supply pump 8, the other end of the water supply pump 8 is connected with one end of a condenser 7, and the other end of the condenser 7 is connected with the steam turbine 10; the ash bucket gasification air heating system comprises an ash bucket gasification fan 11, an ash bucket steam-air heat exchanger 5 and an ash bucket 13 which are sequentially connected, wherein the ash bucket steam-air heat exchanger 5 is also connected with a condenser 7, a high-pressure steam valve 2 and a low-pressure steam valve 3 are respectively arranged on pipelines between the ejector 1 and the boiler 9 and the steam turbine 10, and mixed steam valves 4 are respectively arranged on pipelines between the ejector 1 and the ash bucket steam-air heat exchanger 5 and between the ejector 1 and the ash bin steam-air heat exchanger 6;
the ash storehouse gasification air heating system comprises an ash storehouse gasification fan 14, an ash storehouse steam-air heat exchanger 6 and an ash storehouse 16 which are sequentially connected, wherein the ash storehouse steam-air heat exchanger 6 is further connected with a pipeline between the ash bucket steam-air heat exchanger 5 and the condenser 7, an ash bucket gasification air door 12 is arranged on the pipeline between the ash bucket gasification fan 11 and the ash bucket steam-air heat exchanger 5, and an ash storehouse gasification air door 15 is arranged on the pipeline between the ash storehouse gasification fan 14 and the ash storehouse steam-air heat exchanger 6.
The invention relates to an ash bucket ash storage gasification air heating system taking injection extraction steam as a heat source, which has the working principle as follows: a boiler 9, a steam turbine 10, a condenser 7 and a water feeding pump 8 form thermodynamic system circulation, main steam or other high-grade steam extraction part steam extraction between the boiler 9 and the steam turbine 10 is connected with an ejector 1, low-grade steam extraction steam after the work of the steam turbine 10 is ejected through the ejector 1, two streams of steam are mixed and then heat an ash hopper and ash storehouse gasification air through a steam-air heat exchanger, and condensed drainage of the steam after heat exchange is returned to the condenser 7 to finish recovery.
The invention relates to an ash bucket ash storage gasification air heating system taking injection extraction steam as a heat source, which has the advantages that: the invention can effectively reduce energy consumption, has good safety, moderate operation and investment cost and good application prospect.
Claims (8)
1. The ash bucket and ash storage gasification air heating system is characterized by comprising an ash bucket gasification air heating system, an ash storage gasification air heating system and an injection steam heating system, wherein the ash bucket gasification air heating system and the ash storage gasification air heating system are respectively connected with the injection steam heating system through an ash bucket steam-air heat exchanger (5) and an ash storage steam-air heat exchanger (6).
2. The ash bucket ash storage gasification air heating system taking injection extraction steam as a heat source according to claim 1, which is characterized by comprising an injector (1), wherein one end of the injector (1) is connected with a boiler (9) and a steam turbine (10), the other end of the injector is connected with an ash bucket steam-air heat exchanger (5) and an ash storage steam-air heat exchanger (6), one end of the boiler (9) connected with the injector (1) is further connected with the steam turbine (10), the other end of the boiler is connected with one end of a water feed pump (8), the other end of the water feed pump (8) is connected with one end of a condenser (7), and the other end of the condenser (7) is connected with the steam turbine (10).
3. The ash bucket ash storage gasification air heating system taking injection steam extraction as a heat source according to claim 1, which comprises an ash bucket gasification fan (11), an ash bucket steam-air heat exchanger (5) and an ash bucket (13) which are sequentially connected, wherein the ash bucket steam-air heat exchanger (5) is further connected with a condenser (7).
4. The ash hopper gasification air heating system taking injection steam extraction as a heat source according to claim 1, which comprises an ash hopper gasification fan (14), an ash hopper steam-air heat exchanger (6) and an ash hopper (16) which are sequentially connected, wherein the ash hopper steam-air heat exchanger (6) is further connected with a pipeline between the ash hopper steam-air heat exchanger (5) and a condenser (7).
5. The ash hopper ash storage gasification air heating system taking ejector extraction steam as a heat source according to claim 2, characterized in that a high-pressure steam valve (2) and a low-pressure steam valve (3) are respectively arranged on a pipeline between the ejector (1) and the boiler (9) and the steam turbine (10).
6. The ash hopper and ash storage gasification air heating system taking ejector extraction steam as a heat source according to claim 2, wherein a mixed steam valve (4) is arranged on a pipeline between the ejector (1) and the ash hopper steam-air heat exchanger (5) and the ash storage steam-air heat exchanger (6).
7. The ash hopper gasification air heating system taking injection steam extraction as a heat source according to claim 3, wherein an ash hopper gasification air door (12) is arranged on a pipeline between the ash hopper gasification fan (11) and the ash hopper steam-air heat exchanger (5).
8. The ash hopper and ash storage gasification air heating system taking injection steam extraction as a heat source according to claim 3, wherein an ash storage gasification air door (15) is arranged on a pipeline between the ash storage gasification fan (14) and the ash storage steam-air heat exchanger (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110471900.4A CN113154417A (en) | 2021-04-29 | 2021-04-29 | Ash bucket ash storage gasification air heating system with ejection steam extraction as heat source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110471900.4A CN113154417A (en) | 2021-04-29 | 2021-04-29 | Ash bucket ash storage gasification air heating system with ejection steam extraction as heat source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113154417A true CN113154417A (en) | 2021-07-23 |
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ID=76872170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110471900.4A Pending CN113154417A (en) | 2021-04-29 | 2021-04-29 | Ash bucket ash storage gasification air heating system with ejection steam extraction as heat source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113154417A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240909A (en) * | 2008-03-19 | 2008-08-13 | 清华大学 | Steam jet type heat pump heat distribution system for recovering thermal power plant condensing residual heat |
| JP6384014B1 (en) * | 2018-04-09 | 2018-09-05 | 三菱重工環境・化学エンジニアリング株式会社 | Boiler water pipe adhering ash removal system |
| CN111036076A (en) * | 2019-12-26 | 2020-04-21 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Urea hydrolysis ammonia supply system with injection steam as heat source |
| CN111170011A (en) * | 2020-01-16 | 2020-05-19 | 陕西工业职业技术学院 | Automatic economizer of pneumatic ash conveying system of thermal power plant |
| CN215259881U (en) * | 2021-04-29 | 2021-12-21 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Gasification air steam extraction heating system for ash bucket and ash warehouse |
-
2021
- 2021-04-29 CN CN202110471900.4A patent/CN113154417A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101240909A (en) * | 2008-03-19 | 2008-08-13 | 清华大学 | Steam jet type heat pump heat distribution system for recovering thermal power plant condensing residual heat |
| JP6384014B1 (en) * | 2018-04-09 | 2018-09-05 | 三菱重工環境・化学エンジニアリング株式会社 | Boiler water pipe adhering ash removal system |
| CN111036076A (en) * | 2019-12-26 | 2020-04-21 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Urea hydrolysis ammonia supply system with injection steam as heat source |
| CN111170011A (en) * | 2020-01-16 | 2020-05-19 | 陕西工业职业技术学院 | Automatic economizer of pneumatic ash conveying system of thermal power plant |
| CN215259881U (en) * | 2021-04-29 | 2021-12-21 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Gasification air steam extraction heating system for ash bucket and ash warehouse |
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