CN109323277A - Backheating type cooling system for fire grate - Google Patents
Backheating type cooling system for fire grate Download PDFInfo
- Publication number
- CN109323277A CN109323277A CN201710640136.2A CN201710640136A CN109323277A CN 109323277 A CN109323277 A CN 109323277A CN 201710640136 A CN201710640136 A CN 201710640136A CN 109323277 A CN109323277 A CN 109323277A
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- CN
- China
- Prior art keywords
- tube
- cooling
- grate
- fire grate
- header
- 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.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000012528 membrane Substances 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 10
- 230000001172 regenerating effect Effects 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002028 Biomass Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23H—GRATES; CLEANING OR RAKING GRATES
- F23H3/00—Grates with hollow bars
- F23H3/04—Grates with hollow bars externally cooled, e.g. with water, steam or air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
Abstract
Backheating type cooling system provided by the present invention for fire grate include one be connected with the solidifying pump discharge of therrmodynamic system to take out the bypass line of condensed water；One inlet header, it is connected with above-mentioned bypass line；One cooling pipe connecting with the inlet header, the condensed water entered from inlet header enter the cooling pipe and are used to cool down tube-typed grate；And the outlet header that is connected with the cooling pipe, cooling condensed water is carried out to the tube-typed grate and is collected to outlet header, oxygen-eliminating device is delivered to again from the outlet header, reenters the therrmodynamic system.Cooling system of the present invention cools down tube-typed grate using condensed water, good cooling results, and it is easy to control cooling temperature, in addition, the system also dexterously absorbs radiations heat energy using the fire grate being arranged in burner hearth, cooling water is heated after heated, high-temperature cooling water enters heat regenerative system in this way, feed temperature is improved, system thermal efficiency is also improved, plays energy-efficient effect.
Description
Technical field
The invention belongs to field of thermal power, it is particularly suitable for the cooling system of tube-typed grate in coal-burning boiler.
Background technique
Thermal energy or other energy heats water supply of the coal-burning boiler using raw coal combustion release, to obtain regulation parameter (temperature
Degree, pressure) and quality steam, the coal burning boiler of power station of large capacity utilizes pulverized coal preparation system by fuel with powdery, mist or gaseous state
It sprays into burner hearth and burns in company with air, form red-hot efficient combustion field, do not set fire grate generally.Furnace is set in coal-burning boiler
What row can be used for biomass mixes burning, and the decomposing biomass on the burning platform achievees the effect that biomass comprehensive utilizes.
Fire grate is common in waste incinerator, typically mechanical grate incinerator, it has certain shape, by fire grate
Constitute the bottom of stove.Rubbish is sent into burner hearth from stokehold, is directly sent on fire grate.The weight of movement and rubbish itself due to fire grate
Amount effect, rubbish while carrying out burning overall process on fire grate, from stokehold to furnace after move, with layer fire method solid rubbish
Rubbish burns.First air is arranged in fire grate lower part, and on the one hand the burning for solid on fire grate provides oxygen, on the other hand cooling fire grate,
It prevents from burning out.But this cooling effect is poor.
Summary of the invention
In order to achieve the above-mentioned object of the invention, the present invention is a kind of backheating type cooling system for fire grate, it uses water cooling
Structure realizes the cooling of fire grate.
Backheating type cooling system provided by the present invention for fire grate includes:
One be connected with the solidifying pump discharge of therrmodynamic system to take out the bypass line of condensed water；
One inlet header, it is connected with above-mentioned bypass line；
One cooling pipe connecting with the inlet header, the condensed water entered from inlet header enter the cooling pipe
For being cooled down to tube-typed grate；
One outlet header being connected with the cooling pipe carries out cooling condensed water to the tube-typed grate and is collected to
Outlet header is delivered to oxygen-eliminating device from the outlet header again, reenters the therrmodynamic system.
Further, one hollow pipeline of duct type of the tube-typed grate, the cooling pipe are the hollow pipelines.
Further, the tube-typed grate is formed with diameter with long membrane type hollow pipe using multistage, by same between membrane tube
The fin of material welds, and inlet header and outlet header is respectively set in the both ends of pipe row.
Further, the tube-typed grate forms longitudinal parallel tube bank, the import in inlet header, the intermediate of outlet header
The outside of furnace wall water screen tube is arranged in header, outlet header, and the intermediate tube bank of the tubular type pipe row is in the furnace wall water cooling
The inside of wall pipe, the water screen tube and fire grate tube bank infall are jumped and are managed, and are jumped tube portion and are formed bend pipe, to form cross
Shape is fixed.
Backheating type cooling system of the present invention for fire grate cools down tube-typed grate using water, cooling effect
It is good, and it is easy to control cooling temperature, in addition, the system also dexterously absorbs radiations heat energy using the fire grate being arranged in burner hearth,
All cooling waters are heated after heated, and such high-temperature cooling water enters heat regenerative system, improve feed temperature, also improve system thermal effect
Rate plays energy-efficient effect.
Detailed description of the invention
Attached drawing is to provide further understanding of the invention, they are recorded and constitute part of this application, attached drawing
The embodiment of the invention patent is shown, and is played together with this specification and explains effect of the invention.
Fig. 1 is the structural schematic diagram of one embodiment of the present of invention；
Fig. 2 is the structural schematic diagram of one embodiment of tube-typed grate and cooling line of the invention of the invention；
Fig. 3 is the view in another direction of the embodiment of tube-typed grate and cooling line of the invention.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Referring to Fig. 1, steam enters condenser 1 after the power station steam turbine acting of therrmodynamic system, becomes water, water after steam heat release
It is sequentially sent at different levels low plus 12,13,14,15 through solidifying pump 2, it is low to add using extracted steam from turbine heat-setting water, rise to certain temperature
Enter oxygen-eliminating device 11 afterwards, the water after oxygen-eliminating device heating, which enters boiler and further concentrates, is thermally formed superheated steam, and superheated steam pushes away
Dynamic steam turbine acting, carbonated drink process.
Backheating type cooling system for fire grate of the invention draws a bypass line from solidifying 2 outlet of pump, and condensed water is drawn
Enter inlet header 7, enter tube-typed grate 8 after the distribution of header 7, outlet connection is collected to the condensed water after cooling of tube-typed grate 8
Case 9, then it is delivered to oxygen-eliminating device 11, reenter therrmodynamic system.
The equivalent heating surface area and cooling water flow of tube-typed grate 8 determine the exit water temperature of outlet header 9, when fire grate 8
When equivalent heating surface area is smaller or cooling water flow is larger, when 9 exit water temperature of outlet header is lower, Rendezvous Point should be moved forward to 5
Number low plus 12 or No. 6 low plus 13 entrances, to realize cooling water and condensing water temperature matching.
Referring to fig. 2, in one embodiment of the invention, tube-typed grate 8 includes 81, furnace wall water screen tube of parallel tube bank
82.Tube-typed grate 8 forms longitudinal parallel tube bank 81 among inlet header 7, outlet header 9, and inlet header 7, outlet header 9 are all
Be in the outside of furnace wall water screen tube 82, the intermediate tube bank 81 of pipe row is in the insides of furnace wall water screen tube 82, water screen tube 82 with
Fire grate restrains 81 infalls and jumps pipe, jumps tube portion and forms bend pipe 84, forms cross and fixes.
Referring back to Fig. 3, the parallel tube bank 81 inside fire grate is connected by extended surface tube 83, parallel fire grate tube bank 81 and import
Header 7, outlet header 9 vertically connect, and parallel fire grate tube bank 81 uses membrane tube (hollow tube), returning for fire grate of the invention
The cooling pipe of heat type cooling system is using the hollow pipeline inside fire grate tube bank 81, in this way, for setting fire grate in coal-burning boiler
Cooling system inside there is cooling water (condensed water) to flow through, directly tube-typed grate 8 is cooled down, cooling effect is fine.
Backheating type cooling system for fire grate of the invention also sets up flowmeter 5, pressure gauge 6, thermometer 9 for supervising
Cooling water parameter is surveyed, the adjusting and system protection of shut-off valve 3, regulating valve 4 for flow are also provided with.
The inlet pressure of backheating type cooling system for fire grate of the invention and the outlet pressure of solidifying pump 2 are almost the same,
According to the conditions such as load, coal set fire grate outlet temperature, by adjust entrance cooling flow control outlet header 9 water temperature into
And the temperature of tube-typed grate 8 is controlled, 8 scaling loss of tube-typed grate can be effectively prevent to collapse.
Cut-off is respectively set at the entrance and exit of the cooling water system for setting fire grate in coal-burning boiler of the invention
Valve 3,10 guarantees cooling water one-way flow, prevents from forming condensed water recycling bypass, influences feedwater flow regulation.
When unit starting, 2 synchronous averagings of backheating type cooling system and solidifying pump for fire grate of the invention adjust solidifying pump 2
With design maximum flow control；When unit operates normally, guarantee the enough degree of supercoolings of 9 cooling water of outlet header, according to tube-typed grate 8
The factors such as thermic load, boiler load formulate discharge characteristic controlling curve, adjust control valve opening；When compressor emergency shutdown, cooling water
System regulating valve late release, guarantees that tube-typed grate is fully cooled, so that the tubing of tube-typed grate is in safe temperature section,
Guarantee that fire grate 8 is safely operated.
The connection pipeline section of backheating type cooling system for fire grate of the invention may include regulating valve, flowmeter, three-way piece
And its connecting line, realize the flow control of cooling working medium.
In particular, it should be pointed out that the cooling water into tube-typed grate 8 comes from unit heat regenerative system, access point is in condensed water
Pump (solidifying pump) 2 outlets or the outlet of next stage low-pressure heater, are recycled to after heat exchange is heated by the cooling water of tube-typed grate 8
Unit heat regenerative system, access point is in 11 import of oxygen-eliminating device.
Inlet header 7 and outlet header 9 is arranged in tube-typed grate 9, to realize the shunting of cooling water and collect, reduces tube furnace
The flow deviation of row 8.
Manual gate valve and regulating valve are set on the cooling water pipe road for the backheating type cooling system of fire grate of the invention,
According to hydraulic pressure after valve and flowmeter measurements regulating valve position, the flow control of cooling working medium is realized, to adapt to unit load and furnace
Arrange the requirement of body temperature variation.
The system is due to absorbing radiations heat energy using the tube-typed grate 8 being arranged in burner hearth, the high-temperature cooling water after being heated
Into heat regenerative system, feed temperature is improved, system thermal efficiency is improved, plays energy-efficient effect.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, those skilled in the art should understand that, to technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (4)
1. being used for the backheating type cooling system of fire grate characterized by comprising
One be connected with the solidifying pump discharge of therrmodynamic system to take out the bypass line of condensed water；
One inlet header, it is connected with above-mentioned bypass line；
One cooling pipe connecting with the inlet header, the condensed water entered from inlet header enter the cooling pipe and are used to
Tube-typed grate is cooled down；
One outlet header being connected with the cooling pipe carries out cooling condensed water to the tube-typed grate and is collected to outlet
Header is delivered to oxygen-eliminating device from the outlet header again, reenters the therrmodynamic system.
2. being used for the backheating type cooling system of fire grate as described in claim 1, which is characterized in that the cooling pipe is described
Hollow pipeline.
3. being used for the backheating type cooling system of fire grate as claimed in claim 2, which is characterized in that the tube-typed grate is using more
Section is formed with diameter with long membrane type hollow pipe, is welded between membrane tube by the fin of same material, and the both ends of pipe row are respectively set
Inlet header and outlet header.
4. being used for the backheating type cooling system of fire grate as claimed in claim 3, which is characterized in that the tube-typed grate is in import
Header, the intermediate of outlet header form longitudinal parallel tube bank, and furnace wall water screen tube is arranged in the inlet header, outlet header
Outside, the intermediate tube bank of the tube-typed grate are in the inside of the furnace wall water screen tube, the water screen tube and the fire grate
It restrains infall and jumps pipe, jump tube portion and form bend pipe, fixed to form cross.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710640136.2A CN109323277A (en) | 2017-07-31 | 2017-07-31 | Backheating type cooling system for fire grate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710640136.2A CN109323277A (en) | 2017-07-31 | 2017-07-31 | Backheating type cooling system for fire grate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109323277A true CN109323277A (en) | 2019-02-12 |
Family
ID=65244921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710640136.2A Pending CN109323277A (en) | 2017-07-31 | 2017-07-31 | Backheating type cooling system for fire grate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109323277A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587116A (en) * | 2021-09-28 | 2021-11-02 | 光大环保技术装备（常州）有限公司 | Control method, control system and equipment for protection equipment in water-cooling circulation system |
| WO2023236481A1 (en) * | 2022-06-07 | 2023-12-14 | 上海康恒环境股份有限公司 | Fire grate frame cooling system and incinerator |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104797A (en) * | 1985-11-29 | 1987-06-03 | 福斯特·惠勒能源公司 | The pipe and the support system that are used for heat exchanger |
| US4770128A (en) * | 1988-04-05 | 1988-09-13 | The Babcock & Wilcox Company | Heat exchanger support |
| CN2622563Y (en) * | 2003-06-03 | 2004-06-30 | 常州市锅炉设备有限公司 | Water cooling fixed fire grate for reciprocative furnace |
| CN201310899Y (en) * | 2008-11-14 | 2009-09-16 | 北京国电龙源杭锅蓝琨能源工程技术有限公司 | Cooling device of water-cooling vibration grate |
| CN101762115A (en) * | 2009-12-31 | 2010-06-30 | 华南理工大学 | Unsupported alternating curved tube dry type evaporator |
| CN202329236U (en) * | 2011-11-25 | 2012-07-11 | 长沙有色冶金设计研究院有限公司 | Smoke gas afterheat recovery thermal system for ferroalloy electric furnace |
| CN204064000U (en) * | 2014-08-19 | 2014-12-31 | 中冶华天工程技术有限公司 | Heating furnace residual heat integrative utilizes electricity generation system |
| CN205909315U (en) * | 2016-06-30 | 2017-01-25 | 天津市瀚洋金属设备有限公司 | Boiler fire grate |
| CN207486825U (en) * | 2017-07-31 | 2018-06-12 | 上海明华电力技术工程有限公司 | For the backheating type cooling system of fire grate |
-
2017
- 2017-07-31 CN CN201710640136.2A patent/CN109323277A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86104797A (en) * | 1985-11-29 | 1987-06-03 | 福斯特·惠勒能源公司 | The pipe and the support system that are used for heat exchanger |
| US4770128A (en) * | 1988-04-05 | 1988-09-13 | The Babcock & Wilcox Company | Heat exchanger support |
| CN2622563Y (en) * | 2003-06-03 | 2004-06-30 | 常州市锅炉设备有限公司 | Water cooling fixed fire grate for reciprocative furnace |
| CN201310899Y (en) * | 2008-11-14 | 2009-09-16 | 北京国电龙源杭锅蓝琨能源工程技术有限公司 | Cooling device of water-cooling vibration grate |
| CN101762115A (en) * | 2009-12-31 | 2010-06-30 | 华南理工大学 | Unsupported alternating curved tube dry type evaporator |
| CN202329236U (en) * | 2011-11-25 | 2012-07-11 | 长沙有色冶金设计研究院有限公司 | Smoke gas afterheat recovery thermal system for ferroalloy electric furnace |
| CN204064000U (en) * | 2014-08-19 | 2014-12-31 | 中冶华天工程技术有限公司 | Heating furnace residual heat integrative utilizes electricity generation system |
| CN205909315U (en) * | 2016-06-30 | 2017-01-25 | 天津市瀚洋金属设备有限公司 | Boiler fire grate |
| CN207486825U (en) * | 2017-07-31 | 2018-06-12 | 上海明华电力技术工程有限公司 | For the backheating type cooling system of fire grate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113587116A (en) * | 2021-09-28 | 2021-11-02 | 光大环保技术装备（常州）有限公司 | Control method, control system and equipment for protection equipment in water-cooling circulation system |
| WO2023236481A1 (en) * | 2022-06-07 | 2023-12-14 | 上海康恒环境股份有限公司 | Fire grate frame cooling system and incinerator |
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