CN104785095A - High-temperature desulphurization method and desulphurization device of industrial boiler - Google Patents
High-temperature desulphurization method and desulphurization device of industrial boiler Download PDFInfo
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- CN104785095A CN104785095A CN201510187241.6A CN201510187241A CN104785095A CN 104785095 A CN104785095 A CN 104785095A CN 201510187241 A CN201510187241 A CN 201510187241A CN 104785095 A CN104785095 A CN 104785095A
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Abstract
The invention discloses a high-temperature desulphurization method and a desulphurization device of an industrial boiler. The method comprises the following steps: flue gas generated by a furnace chamber of the boiler is introduced into a cooling region of the desulphurization device to be cooled and then enters a desulphurization region; low-temperature flue gas in a tail flue of the boiler or external cold air is pumped into the desulphurization region by using a fan to be mixed with the flue gas, the air speed of the pumped low-temperature flue gas or the cold air is controlled according to load change conditions of the boiler, and then limestone powder is fed into the desulphurization device. The device comprises the boiler, wherein the desulphurization device is arranged near the furnace chamber of the boiler; the cooling region and the desulphurization region formed by convection heating surfaces are arranged in the desulphurization device; a flue gas inlet of the desulphurization region is communicated with a flue gas outlet of the furnace chamber of the boiler through the cooling region; a flue gas outlet of the desulphurization region is communicated with a convection heating surface region of the boiler through a pipeline; a low-temperature flue gas or cold air input hole is communicated with the tail flue of the boiler or an external cold air pipe through an air supply pipeline; the fan is mounted on the air supply pipeline.
Description
Technical field:
The present invention relates to Industrial Boiler high temperature desulfurizing method and desulfurizer thereof, belong to Desulfurization Technique for Coal-fired Boilers field.
Background technology:
At present, developed multiple desulfur technology and device both at home and abroad for boiler desulfurization, wherein applied and have wet desulphurization, dry desulfurization, in-furnace calcium spraying method etc. more widely.Wet Flue Gas Desulfurization Technique adopts lime stone slurry as agstone, and through absorbing, oxidation and the process such as demist reach desulfurized effect, shortcoming be have that operating cost is high, equipment corrosion serious, waste water must the problem such as process; It is carry out under dry state that the desulfurization of desulfurization by dry method absorbs, although the method is relatively simple, corrosion-free and without wastewater treatment, there is the problem that desulfuration efficiency is low, reaction speed is slow.
According to the burning feature of Industrial Boiler, there is Industrial Boiler furnace sorbent injection desulfurization technology, the method is at high temperature sintered into calcium oxide after solid agstone is directly sprayed into burner hearth, absorbs the sulfur dioxide in flue gas, thus realize carrying out desulfurization in burner hearth; This method stops short problem cannot reach abundant reaction because operationally reaction temperature controls bad and flue gas in burner hearth, thus there is the low problem of desulfuration efficiency.
Summary of the invention:
In order to solve the inefficient problem of existing Industrial Boiler furnace sorbent injection desulfurization, the present invention proposes a kind of Industrial Boiler high temperature desulfurizing method and desulfurizer thereof, this method accurately can control the temperature and time of desulphurization reaction, the flue-gas temperature in desulfurizer is made to reach optimum value, sulfur dioxide in the calcium oxide of agstone fast decoupled and flue gas is fully reacted, this method can improve desulfuration efficiency, reaches good desulfurized effect, effectively can reduce operating cost.
The technical solution used in the present invention is: Industrial Boiler high temperature desulfurizing method, is characterized in that comprising the following steps:
A, the flue gas produced by boiler furnace introduce desulfurizer, and the convection heating surface of flue gas first through cooling area in desulfurizer reduces temperature to 740-760 degree, then enters desulfurization zone;
B, with blower fan, the low-temperature flue gas in boiler back end ductwork or outside cold wind are pumped into desulfurization zone and mix with flue gas, regulate the temperature of flue gas in desulfurization zone to design temperature scope further by the low-temperature flue gas of controlled circulation suction or the air quantity of cold wind;
C, according to boiler load situation of change, control the low-temperature flue gas of suction or the wind speed of cold wind, realize flue gas residence time ranges for design in desulfurizer;
D, agstone is sent in desulfurizer, agstone resolves into calcium oxide and sulfur dioxide in flue gas reaction desulfuration, course of reaction is carried out under the temperature conditions of design and in the reaction time of design, and the flue gas after desulfurization is discharged in lower step handling procedure through the convection heating surface of boiler.
A kind of boiler devulcanizer for realizing method described in claim 1, comprise boiler, it is characterized in that: near boiler furnace, be provided with desulfurizer, cooling area and the desulfurization zone of convection heating surface formation is provided with in desulfurizer, described desulfurization zone is provided with smoke inlet, exhanst gas outlet, agstone input port, low-temperature flue gas or cold wind input port, wherein the smoke inlet of desulfurization zone is communicated with the exhaust opening of boiler furnace by cooling area, exhanst gas outlet and the Boiler Convection Heating Surface district of desulfurization zone pass through pipeline communication, low-temperature flue gas or cold wind input port are communicated with boiler back end ductwork by air supply duct or are communicated with outside cool air hose, air supply duct is equipped with blower fan,
Desulfurizer near described boiler furnace, can be located at outside the boiler adjacent with burner hearth, for independently desulfurization field or be located in boiler, between burner hearth and the convection heating surface district of boiler;
Being arranged on the desulfurizer outside boiler, can be one group or two groups.
Beneficial effect of the present invention: the present invention first reduces temperature through cooling convection heating surface by making the flue gas produced in burner hearth, be mixed into a step again with low-temperature flue gas or cold wind and save temperature to optimum value, by regulating low-temperature flue gas or cold wind flow velocity to ensure that the sulfur dioxide in flue gas has the calcium oxide decomposed in time enough and lime stone fully to react, effectively improve desulfuration efficiency; High temperature desulfurizing method of the present invention not etching apparatus, do not need process waste water, floor space is little, therefore can reduce operating cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of high temperature desulfurizing method external desulfurizer of the present invention;
Fig. 2 is the structural representation of the built-in desulfurizer of high temperature desulfurizing method of the present invention.
1 burner hearth in figure, the exhaust opening of 2 burner hearths, 3 cooling areas, 4 agstone input ports, 5 desulfurization zones, 6 batchers, 7 agstone storage tanks, 8 exhanst gas outlets, 9 desulfurizers, 10 denitrfying agent storage tanks, 11 air supply ducts, 12 air preheaters or economizer, 13 circulation pump or fans, 14 dampers, 15 blower fans, 16 outside cool air hoses, 17 air-introduced machines, 18 boiler back end ductworks, 19 dedusters, 20 Boiler Convection Heating Surfaces, 21 denitration chamber, the exhanst gas outlet of 22 desulfurization zones, 23 ash holes, 24 low-temperature flue gas or cold wind input port, 25 smoke inlets, 26 fire grates, 27 add coal bunker.
Detailed description of the invention
The present invention relates to Industrial Boiler high temperature desulfurizing method and desulfurizer thereof, belong to Desulfurization Technique for Coal-fired Boilers, inventive desulfurization method is: near boiler furnace 1, be provided with desulfurizer 9, this desulfurizer, can be arranged in outside boiler, the one or both sides of boiler furnace are independently one group or two groups of desulfurization fields; This desulfurizer also can be arranged in boiler, specifically between burner hearth and the convection heating surface district of boiler, no matter be that built-in or external desulfurizer is identical with the connected mode of boiler.
Cooling area 3 and the desulfurization zone 5 of convection heating surface formation is furnished with in desulfurizer, the bottom of cooling area is provided with ash hole 23, smoke inlet 25 is provided with in desulfurization zone, exhanst gas outlet 8, agstone input port 4, low-temperature flue gas or cold wind input port 24, wherein the smoke inlet of desulfurization zone is communicated with the exhaust opening 2 of boiler furnace by cooling area, the exhanst gas outlet 22 of desulfurization zone passes through pipeline communication with the convection heating surface district in boiler, low-temperature flue gas or cold wind input port are communicated with boiler back end ductwork 18 by air supply duct 11, or be communicated with outside cool air hose 16, described boiler back end ductwork is provided with deduster 19, boiler back end ductwork end is equipped with air-introduced machine 17, blower fan 15 air supply duct is equipped with, the air outlet of blower fan is provided with damper 14, the flue gas that boiler furnace produces introduces desulfurizer, the convection heating surface of flue gas first through cooling area in desulfurizer reduces temperature to 740-760 degree, then desulfurization zone is entered, with blower fan, the low-temperature flue gas in boiler back end ductwork or outside cold wind are pumped into desulfurization zone to mix with flue gas, regulate the temperature of flue gas in desulfurization zone to design temperature scope further by the low-temperature flue gas of controlled circulation suction or the air quantity of cold wind, according to boiler load situation of change, control the low-temperature flue gas of suction or the circulation wind speed of cold wind, realize flue gas residence time ranges for design in desulfurizer, by batcher 6, the agstone be stored in agstone storage tank 7 is sent in desulfurizer, agstone resolves into calcium oxide and sulfur dioxide in flue gas reaction desulfuration, course of reaction is carried out under the temperature conditions of design and in the reaction time of design, and the flue gas after desulfurization is discharged in lower step handling procedure through the convection heating surface of boiler, between Boiler Convection Heating Surface 20 and cooling area, be provided with denitration chamber 21 in the present embodiment, denitrfying agent storage tank 10 is connected with denitration chamber feed by pipeline, air preheater or the economizer 12 of band circulation pump or fan 13 is provided with in Boiler Convection Heating Surface.
The present invention accurately can control the temperature and time of desulphurization reaction, the flue-gas temperature in desulfurizer is made to reach optimum value, sulfur dioxide in the calcium oxide of agstone fast decoupled and flue gas is fully reacted, this method can improve desulfuration efficiency, desulfurized effect is good, solves the inefficient problem of existing Industrial Boiler furnace sorbent injection desulfurization.
Claims (4)
1. Industrial Boiler high temperature desulfurizing method, is characterized in that comprising the following steps:
A, the flue gas produced by boiler furnace introduce desulfurizer, and the convection heating surface of flue gas first through cooling area in desulfurizer reduces temperature to 740-760 degree, then enters desulfurization zone;
B, with blower fan, the low-temperature flue gas in boiler back end ductwork or outside cold wind are pumped into desulfurization zone and mix with flue gas, regulate the temperature of flue gas in desulfurization zone to design temperature scope further by the low-temperature flue gas of controlled circulation suction or the air quantity of cold wind;
C, according to boiler load situation of change, control the low-temperature flue gas of suction or the wind speed of cold wind, realize flue gas residence time ranges for design in desulfurizer;
D, agstone is sent in desulfurizer, agstone resolves into calcium oxide and sulfur dioxide in flue gas reaction desulfuration, course of reaction is carried out under the temperature conditions of design and in the reaction time of design, and the flue gas after desulfurization is discharged in lower step handling procedure through the convection heating surface of boiler.
2. one kind for realizing the boiler devulcanizer of method described in claim 1, comprise boiler, it is characterized in that: near boiler furnace, be provided with desulfurizer, cooling area and the desulfurization zone of convection heating surface formation is provided with in desulfurizer, described desulfurization zone is provided with smoke inlet, exhanst gas outlet, agstone input port, low-temperature flue gas or cold wind input port, wherein the smoke inlet of desulfurization zone is communicated with the exhaust opening of boiler furnace by cooling area, exhanst gas outlet and the Boiler Convection Heating Surface district of desulfurization zone pass through pipeline communication, low-temperature flue gas or cold wind input port are communicated with boiler back end ductwork by air supply duct or are communicated with outside cool air hose, air supply duct is equipped with blower fan.
3. boiler devulcanizer according to claim 2, it is characterized in that: the desulfurizer near described boiler furnace, can be located at outside the boiler adjacent with burner hearth, for independently desulfurization field or be located in boiler, between burner hearth and the convection heating surface district of boiler.
4. boiler devulcanizer according to claim 3, is characterized in that: be arranged on the desulfurizer outside boiler, can be one group or two groups.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510187241.6A CN104785095A (en) | 2015-04-20 | 2015-04-20 | High-temperature desulphurization method and desulphurization device of industrial boiler |
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| CN201510187241.6A CN104785095A (en) | 2015-04-20 | 2015-04-20 | High-temperature desulphurization method and desulphurization device of industrial boiler |
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| CN104785095A true CN104785095A (en) | 2015-07-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105582803A (en) * | 2016-03-01 | 2016-05-18 | 靳曲 | Desulfurization and denitrification method in boiler and desulfurization and denitrification reaction furnace thereof |
| CN106325152A (en) * | 2016-08-22 | 2017-01-11 | 四川华索自动化信息工程有限公司 | Frequency error correction type flue pipe temperature monitoring system based on Internet-of-things technology |
| CN108167843A (en) * | 2016-12-07 | 2018-06-15 | 新日铁住金工程技术株式会社 | Nitrogenous incineration of liquor stove and its method of denitration |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672942A (en) * | 2013-01-18 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Powdery solid fuel boiler and dry method purification process system |
| CN204563929U (en) * | 2015-04-20 | 2015-08-19 | 靳新令 | Industrial Boiler high temperature desulfurizing device |
-
2015
- 2015-04-20 CN CN201510187241.6A patent/CN104785095A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103672942A (en) * | 2013-01-18 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Powdery solid fuel boiler and dry method purification process system |
| CN204563929U (en) * | 2015-04-20 | 2015-08-19 | 靳新令 | Industrial Boiler high temperature desulfurizing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105582803A (en) * | 2016-03-01 | 2016-05-18 | 靳曲 | Desulfurization and denitrification method in boiler and desulfurization and denitrification reaction furnace thereof |
| CN105582803B (en) * | 2016-03-01 | 2018-05-11 | 靳曲 | Boiler desulfurization method of denitration and its desulfurization and denitrification reaction stove |
| CN106325152A (en) * | 2016-08-22 | 2017-01-11 | 四川华索自动化信息工程有限公司 | Frequency error correction type flue pipe temperature monitoring system based on Internet-of-things technology |
| CN108167843A (en) * | 2016-12-07 | 2018-06-15 | 新日铁住金工程技术株式会社 | Nitrogenous incineration of liquor stove and its method of denitration |
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