CN104324604A - Circulating fluidized bed process sintering flue gas desulfurization system capable of preventing hardening of filter bag of dust collector - Google Patents
Circulating fluidized bed process sintering flue gas desulfurization system capable of preventing hardening of filter bag of dust collector Download PDFInfo
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- CN104324604A CN104324604A CN201410637231.3A CN201410637231A CN104324604A CN 104324604 A CN104324604 A CN 104324604A CN 201410637231 A CN201410637231 A CN 201410637231A CN 104324604 A CN104324604 A CN 104324604A
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- desulfurizing tower
- flue gas
- dust collector
- desulfurizing
- filter bag
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Abstract
The invention discloses a circulating fluidized bed process sintering flue gas desulfurization system capable of preventing hardening of a filter bag of a dust collector. The system comprises a sintering machine, an electrostatic precipitator and a main exhaust fan which are sequentially connected with one another, wherein the main exhaust fan is connected with a desulfurizing tower by a valve; the desulfurizing tower is connected with a reaction tank filled with a desulfurizing agent, Ca(OH)2, and a water supply pipeline used for reducing the temperature of flue gas in the desulfurizing tower; the reaction tank is connected with a quick lime charging bucket and a water pipe; the desulfurizing tower is connected with a bag-type dust collector; flue gas of the bag-type dust collector is discharged into a chimney by an induced draft fan; most desulfurized fly ash of the bag-type dust collector returns back into the desulfurizing tower again in a circulating way, and little ash enters an ash bin and then is transported outside; a steam pipeline and a desulfurizing agent pipeline directly connected with the quick lime charging bucket are additionally arranged on the desulfurizing tower. After the system is adopted, the filter bag of the following dust collector is prevented from being hardened even if the initial temperature of the flue gas in the tower is too low; therefore, the situation that a sintering machine is forced to stop production as a desulfurization facility can not be used is avoided, and the loss of an enterprise can be avoided.
Description
Technical field
The present invention relates to sintering flue gas desulfurization system, specifically, is a kind of circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening.
Background technology
Sinter fume not only containing dust, and contains a large amount of SO
2, NO
xetc. harmful substance, current sintering flue gas desulfurization system adopts wet method, dry method, semidry method etc.Circulating sulfuration bed process removes SO
2reaction principle be: SO
2with Ca (OH)
2(desulfurizing agent) reacts, and generates CaSO
3﹒ 1/2H
2o, CaSO
4﹒ 1/2H
2o and a small amount of CaCl
2, CaF
2deng desulfurizing byproduct.
As shown in Figure 1, the circulating sulfuration bed process sintering flue gas desulfurization system of prior art comprises the sintering machine 1, electric cleaner 2, the main exhauster 3 that connect successively, main exhauster 3 is connected with desulfurizing tower 5 by valve 4, desulfurizing tower 5 is connected with and adds desulfurizing agent Ca (OH)
2retort 6 and reduce the water supply line 7 of flue-gas temperature in desulfurizing tower 5, retort 6 is connected with quick lime batch can 8 and water pipe 9, desulfurizing tower 5 is connected with sack cleaner 10, the flue gas of sack cleaner 10 enters chimney 11 by air-introduced machine 12, and the circulation of sack cleaner 10 Desulphurization major part returns desulfurizing tower 5 again, and a small amount of ash is transported outward after entering ash silo 14, simultaneously, in order to prevent filter bag of dust collector from hardening, outer row's initial flue gas, main exhauster 3 is also directly connected with chimney 11 by bypass valve 13.
Desulfurization fume introduces desulphurization system after main exhauster of sintering, and be provided with bypass valve (desulphurization system debugging or accident condition can be arranged) directly outward, when SINTERING PRODUCTION and desulphurization system are normally run, flue gas enters desulfurizing tower, adds desulfurizing agent and water simultaneously.1. according to SO
2concentration of emission control the addition of desulfurizing agent; 2. add water one is to reduce flue-gas temperature; Two is make SO
2fully react with desulfurizing agent, in tower, optimal reaction temperature is at 75 DEG C-90 DEG C, sinter fume temperature 120 DEG C about-150 DEG C during normal production, desulfurizing tower flue gas out enters sack cleaner, chimney is entered again by desulfurization air-introduced machine, the circulation of Desulphurization major part participates in reaction again, a small amount of ash outward transport.
But there is following problem in the circulating sulfuration bed process sintering flue gas desulfurization system of prior art: when sintering machine is normally produced, the operation that desulphurization system can be more stable, every environmental protection index can qualified discharge.But when sintering machine stop production to overhaul, the initial stage of again producing, flue-gas temperature lower (50 DEG C-60 DEG C), about 1-2 hour flue-gas temperature recovers normal value gradually, and sintering process be raw material, auxiliary material, fuel etc. need add water mixing after, enter pallet, material water ratio is generally about 7.8%, particularly in the winter of cold, smoke moisture is comparatively large, and temperature is lower in addition, as sprayed water, (do not add water affects SO to Ta Nei again
2with reactive desulfurizing agent, make SO
2discharge beyond standards), be easy to cause tower filter bag of dust collector below to occur the phenomenon that hardens, prior art utilizes bypass to arrange initial flue gas outward to solve this problem.
Current environmental administration requires that bypass must disconnect, to prevent enterprise pollution outer row privately.So: 1. open sintering machine in earlier stage, low-temperature sintering flue gas easily causes dust-collecting bag to harden, and can only change cloth bag, for 360m once harden
2sintering desulfuration 10,000 sack cleaners, the expense changed once approximately needs about 8,000,000 yuan (filtrate material is the PTFE of import); If 2. now do not added water, make SO
2well can not react with desulfurizing agent, cause SO
2exceed standard outer row, not only contaminated environment, and enterprise will be subject to the punishment of environmental administration, so that stop production.
Summary of the invention
Technical problem to be solved by this invention is, one is provided to ensure after dismounting bypass, desulphurization system can normally be run, while making cloth bag not occur hardening, every environmental protection index qualified discharge, ensures the normal circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening of producing simultaneously.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening, comprise the sintering machine, electric cleaner, the main exhauster that connect successively, main exhauster is connected with desulfurizing tower by valve, desulfurizing tower is connected with and adds desulfurizing agent Ca (OH)
2retort and reduce the water supply line of flue-gas temperature in desulfurizing tower, retort is connected with quick lime batch can and water pipe, desulfurizing tower is connected with sack cleaner, the flue gas of sack cleaner enters chimney by air-introduced machine, the circulation of sack cleaner Desulphurization major part returns desulfurizing tower again, a small amount of ash is transported outward after entering ash silo, described desulfurizing tower increases a road jet chimney and a road directly and the tank connected desulfurizing agent pipeline of quick lime material.
Electric flow control valve, steam-flow meter and switch is also provided with between described jet chimney and desulfurizing tower.
Also valve is provided with between described desulfurizing agent pipeline and desulfurizing tower.
The invention has the beneficial effects as follows:
1. ensure not cause follow-up filter bag of dust collector to harden because initial flue gas temperature is too low in tower;
2. ensure there is enough moisture in tower, make SO
2fully react with desulfurizing agent, make the environmental protection index qualified discharge of desulphurization system;
3. greatly reduce and change the economic loss that causes of filter bag of dust collector and plant maintenance time;
4. make sintering machine not because desulfurization equipment cannot use and be forced to stop production, cause damage to enterprise.
Accompanying drawing explanation
Fig. 1 is the structural representation of the circulating sulfuration bed process sintering flue gas desulfurization system of prior art.
Fig. 2 is the structural representation of the circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
The operation principle of circulating sulfuration bed process sintering flue gas desulfurization system of the present invention is identical with prior art, can with reference to prior art, so no longer describe, below the present invention will be described in detail:
As shown in Figure 2, the circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening of the present invention, comprise the sintering machine 1, electric cleaner 2, the main exhauster 3 that connect successively, main exhauster 3 is connected with desulfurizing tower 5 by valve 4, desulfurizing tower 5 is connected with and adds desulfurizing agent CaOH
2retort 6 and reduce the water supply line 7 of flue-gas temperature in desulfurizing tower 5, retort 6 is connected with quick lime batch can 8 and water pipe 9, desulfurizing tower 5 is connected with sack cleaner 10, the flue gas of sack cleaner 10 enters chimney 11 by air-introduced machine 12, the circulation of sack cleaner 10 Desulphurization major part returns desulfurizing tower 5 again, a small amount of ash is transported outward after entering ash silo 14, described desulfurizing tower 5 increases the desulfurizing agent pipeline 16 that a road jet chimney 15 is directly connected with quick lime batch can 8 with a road.
Electric flow control valve, steam-flow meter and switch (not shown) is also provided with between described jet chimney 15 and desulfurizing tower 5.
Valve (not shown) is also provided with between described desulfurizing agent pipeline 16 and desulfurizing tower 5.
Below control procedure of the present invention is described in detail:
1. on desulfurizing tower 5, increase by road jet chimney 15 (low-alloy No. 20 steel, pressure 0.4MP, a flow 50m
3/ h), with electric flow control valve, steam-flow meter, switch on jet chimney 15, when sintering machine 1 starts the production initial stage, close supply channel 7, regulate depending on flue-gas temperature height in desulfurizing tower 5 size spraying into quantity of steam, ensure the temperature and the moisture condition that maintain applicable desulphurization reaction in tower.2. increase by a road desulfurizing agent pipeline 16, quick lime (CaO) is directly squeezed into desulfurizing tower 5, make CaO and steam reaction generate Ca (OH)
2, a large amount of heat utilizing chemical reaction to release is to improve flue-gas temperature.When flue-gas temperature recovers normal value, steam off pipeline 15, opens the valve of water supply line 7, supplies water to desulfurizing tower 5; Close the valve adding the desulfurizing agent pipeline 16 of quick lime, recover the normal duty of desulphurization system (process with prior art).
System of the present invention, had both ensured not harden because of too low cloth dirt deduster 10 filter bag that causes of initial flue gas temperature in desulfurizing tower 5, and in turn ensure that in desulfurizing tower 5 have enough moisture, make SO
2fully react with desulfurizing agent, the final every environmental protection index qualified discharge ensureing desulphurization system.
Above-described embodiment is only for illustration of technological thought of the present invention and feature, its object is to enable those skilled in the art understand content of the present invention and implement according to this, only can not limit the scope of the claims of the present invention with the present embodiment, namely the equal change done of all disclosed spirit or modification, still drop in the scope of the claims of the present invention.
Claims (3)
1. the circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening, comprise the sintering machine (1) connected successively, electric cleaner (2), main exhauster (3), main exhauster (3) is connected with desulfurizing tower (5) by valve (4), desulfurizing tower (5) is connected with the retort (6) adding desulfurizing agent Ca (OH) 2 and the water supply line (7) reducing flue-gas temperature in desulfurizing tower (5), retort (6) is connected with quick lime batch can (8) and water pipe (9), desulfurizing tower (5) is connected with sack cleaner (10), the flue gas of sack cleaner (10) enters chimney (11) by air-introduced machine (12), the circulation of sack cleaner (10) Desulphurization major part returns desulfurizing tower (5) again, a small amount of ash enters ash silo (14) and transports outward afterwards, it is characterized in that, the desulfurizing agent pipeline (16) that upper increase by road jet chimney (15) of described desulfurizing tower (5) is directly connected with quick lime batch can (8) with a road.
2. the circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening according to claim 1, it is characterized in that, between described jet chimney (15) and desulfurizing tower (5), be also provided with electric flow control valve, steam-flow meter and switch.
3. the circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening according to claim 1, is characterized in that, be also provided with valve between described desulfurizing agent pipeline (16) and desulfurizing tower (5).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410637231.3A CN104324604B (en) | 2014-11-12 | 2014-11-12 | Prevent the circulating sulfuration bed process sintering flue gas desulfurization system that filter bag of dust collector hardens |
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|---|---|---|---|
| CN201410637231.3A CN104324604B (en) | 2014-11-12 | 2014-11-12 | Prevent the circulating sulfuration bed process sintering flue gas desulfurization system that filter bag of dust collector hardens |
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| CN104324604A true CN104324604A (en) | 2015-02-04 |
| CN104324604B CN104324604B (en) | 2016-07-20 |
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| CN201410637231.3A Active CN104324604B (en) | 2014-11-12 | 2014-11-12 | Prevent the circulating sulfuration bed process sintering flue gas desulfurization system that filter bag of dust collector hardens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112275137A (en) * | 2020-09-21 | 2021-01-29 | 东方电气集团东方锅炉股份有限公司 | System and method for preheating sintering flue gas SCR denitration catalyst |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003251142A (en) * | 2002-02-28 | 2003-09-09 | Setec:Kk | Dry type waste gas desulfurization system |
| CN202893130U (en) * | 2012-08-13 | 2013-04-24 | 河南绿源新星环保设备有限公司 | Semi-dry type ammonia desulfurization device |
| CN203848702U (en) * | 2014-05-24 | 2014-09-24 | 利保科技有限公司 | Sintering machine flue gas desulfurization device |
| CN204338013U (en) * | 2014-11-12 | 2015-05-20 | 天津钢铁集团有限公司 | The circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening |
-
2014
- 2014-11-12 CN CN201410637231.3A patent/CN104324604B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003251142A (en) * | 2002-02-28 | 2003-09-09 | Setec:Kk | Dry type waste gas desulfurization system |
| CN202893130U (en) * | 2012-08-13 | 2013-04-24 | 河南绿源新星环保设备有限公司 | Semi-dry type ammonia desulfurization device |
| CN203848702U (en) * | 2014-05-24 | 2014-09-24 | 利保科技有限公司 | Sintering machine flue gas desulfurization device |
| CN204338013U (en) * | 2014-11-12 | 2015-05-20 | 天津钢铁集团有限公司 | The circulating sulfuration bed process sintering flue gas desulfurization system preventing filter bag of dust collector from hardening |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112275137A (en) * | 2020-09-21 | 2021-01-29 | 东方电气集团东方锅炉股份有限公司 | System and method for preheating sintering flue gas SCR denitration catalyst |
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| CN104324604B (en) | 2016-07-20 |
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