CN104226101A - Slurry circulation process based on SDA process desulfurization system - Google Patents
Slurry circulation process based on SDA process desulfurization system Download PDFInfo
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- CN104226101A CN104226101A CN201410459139.2A CN201410459139A CN104226101A CN 104226101 A CN104226101 A CN 104226101A CN 201410459139 A CN201410459139 A CN 201410459139A CN 104226101 A CN104226101 A CN 104226101A
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Abstract
The invention relates to a slurry circulation process based on an SDA (Spray Drying Absorption) process desulfurization system. The slurry circulation process comprises the steps that (1) desulfurized fly ash of a desulfurization tower enters an accident pool, is mixed and stirred together with digestive water to prepare circulation slurry, the circulation slurry enters a slurry top tank after being filtered, and finally the filtered circulation slurry enters an atomizer to participate in desulfurization reaction; (2) when the desulfurization system fails or is maintained, slurry which overflows from or is discharged from the top tank, a digestion tank and a slurry tank is discharged into the accident pool; and (3) when the desulfurization system recovers to normally work, the slurry is re-circulated. Compared with the prior art, the slurry circulation process has the beneficial effects that (1) the desulfurized fly ash directly enters the accident pool, a dust producing point caused by fly ash discharging and transporting of the desulfurized tower is eliminated, and the environment quality of a desulfurization island is effectively improved; (2) the accident pool in an original desulfurization system is combined with a mixing tank and a circulation slurry tank in a circulation slurry system into a whole, the functions of the accident pool, the mixing tank and the circulation slurry tank are integrated, the quantity of equipment and the occupation area are reduced, and the input cost is lowered; (3) the process route is shortened, the structure is simple, and the operation and the maintenance are convenient.
Description
Technical field
The present invention relates to SDA method technical field of desulfurization, particularly relate to a kind of loop slurry technique based on SDA method desulphurization system.
Background technology
For controlling sulfur dioxide and Acid Rain Pollution, country increases the management of sintering gas flue gas sulfuric dioxide, requires must carry out desulfurization to sinter fume, weakens the impact of sulfur dioxide on ecological environment to the full extent.
Ansteel Engineering Technology Corporation Limited based on rotary spraying and drying technology, Self-Integration SDA sintering flue gas desulfurization technology, and took the lead in being applied to Anshan iron and steel plant and Sha Gang in 2009.On this basis by summing up and improving; this technology is become better and approaching perfection day by day; now one of primary solutions becoming flue gas of sintering machine; in " steel industry prevention and cure of pollution best practicable technology directive/guide---sintering and the pelletizing process " issued by national environmental protection portion, SDA method is recommended as one of flue gas of sintering machine optimum process technology method to enterprise.
For improving the utilization rate of desulfurizing agent, reduce the generation of desulfurizing byproduct, embody circular economy concept, current SDA sulfur removal technology adopts circulation technology mostly, partial desulfurization ash enters loop slurry preparation system, namely Desulphurization enters blending tank and makes loop slurry, and loop slurry enters recycle slurry flow container, top tank successively, finally enters atomizer and participates in desulphurization reaction.
Except loop slurry system, SDA technique need establish accident set pond, collecting-tank is entered by pushing up overflow and emptying slurries in tank, digester, serum pot when accident condition and overhaul of the equipments, by Pulp pump, slurries are promoted to vibratory sieve after recovering normal operation, continue to utilize, thus avoid slurries to arrange, and reduce desulfurizing agent waste outward.(as shown in Figure 1)
Summary of the invention
The invention provides a kind of loop slurry technique based on SDA method desulphurization system, include the emergency pool in desulphurization system in loop slurry system, the Desulphurization that desulfurizing tower produces directly enters emergency pool and makes loop slurry and uses, not only reduce equipment quantity and floor space, shorten process route, reduce input cost, also eliminate one simultaneously and produce dirt pits.
In order to achieve the above object, the present invention realizes by the following technical solutions:
Based on a loop slurry technique for SDA method desulphurization system, the emergency pool of desulphurization system is double does blending tank in serum recycle system and recycle slurry flow container, comprises the steps:
1) Desulphurization unloaded from desulfurizing tower ash bucket enters emergency pool by Desulphurization receiving opening, with digest the digestion water that water pipe transports from technique and mix, loop slurry is made under the abundant stirring action of mixer, be transported on vibratory sieve by Pulp pump, enter slurries top tank after filtration, finally enter atomizer and participate in desulphurization reaction;
2) when desulphurization system breaks down or be in inspecting state, overflow and emptying slurries in the tank of top, enter emergency pool by slurry feed pipe, starts mixer simultaneously and avoid slurries to deposit;
3) when desulphurization system is recovered normally to work, by Pulp pump, the slurries in emergency pool are delivered on vibratory sieve by slurries feed back pipe, re-start circulation.
Described desulfurizing tower is rotary spraying and drying absorption tower.
Slurries amount in described emergency pool is shown by liquid level gauge, and is regulated by control system control grout control valve.
Described technique digestion water pipe is provided with the flowmeter, flow control valve and the flow stop valve that are connected with control system, regulates pushing quantity according to Desulphurization discharge quantity.
Described Pulp pump adopts a-worker-a-backup, and the slurries feed back pipe after Pulp pump is provided with residual cake valve.
For realizing a kind of device of the loop slurry technique based on SDA method desulphurization system, comprise the emergency pool, Pulp pump and the vibratory sieve that are connected successively by slurries feed back pipe, the other Joining Technology digestion water pipe of described emergency pool and slurry feed pipe, the other end of slurry feed pipe connects overfall and the evacuation port of slurries top tank, digester and serum pot, and the Desulphurization receiving opening at emergency pool top connects desulfurizing tower cinder-discharging port by pipeline.
Compared with prior art, the invention has the beneficial effects as follows:
1) Desulphurization directly enters emergency pool by pipeline, eliminates " desulfurizing tower unloads ash and transport " this product dirt pits, effectively improves desulfurization island and environmental quality around;
2) emergency pool in former desulphurization system and the blending tank in loop slurry system, recycle slurry flow container are integrated, and have the function of three concurrently, decrease equipment quantity and floor space, reduce input cost;
3) shorten process route, and structure is simple, operation maintenance is convenient.
Accompanying drawing explanation
Fig. 1 is serum recycle system process figure conventional at present.
Fig. 2 is process chart of the present invention.
In figure: 1. emergency pool 2. mixer 3. slurry feed pipe 4. slurries feed back pipe 5. Pulp pump 6. residual cake valve 7. vibratory sieve 8. technique digestion water pipe 9. flow stop valve 10. flowmeter 11. flow control valve 12. Desulphurization receiving opening
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Seeing Fig. 2, is process chart of the present invention, a kind of loop slurry technique based on SDA method desulphurization system of the present invention, and the emergency pool 1 of desulphurization system is double does blending tank in serum recycle system and recycle slurry flow container, comprises the steps:
1) Desulphurization unloaded from desulfurizing tower ash bucket enters emergency pool 1 by Desulphurization receiving opening 12, with digest the digestion water that water pipe 8 transports from technique and mix, loop slurry is made under the abundant stirring action of mixer 2, be transported on vibratory sieve 7 by Pulp pump 5, enter slurries top tank after filtration, finally enter atomizer and participate in desulphurization reaction;
2) when desulphurization system breaks down or be in inspecting state, overflow and emptying slurries in the tank of top, enter emergency pool 1 by slurry feed pipe 3, starts mixer 2 simultaneously and avoid slurries to deposit;
3) when desulphurization system is recovered normally to work, by Pulp pump 5, the slurries in emergency pool 1 are delivered on vibratory sieve 7 by slurries feed back pipe 4, re-start circulation.
Described desulfurizing tower is rotary spraying and drying absorption tower.
Slurries amount in described emergency pool 1 is shown by liquid level gauge, and is regulated by control system control grout control valve.
On described technique digestion water pipe, 8 are provided with the flowmeter 10, flow control valve 11 and the flow stop valve 9 that are connected with control system, regulate pushing quantity according to Desulphurization discharge quantity.
Described Pulp pump 5 adopts a-worker-a-backup, and the slurries feed back pipe 4 after Pulp pump 5 is provided with residual cake valve 6.
For realizing a kind of device of the loop slurry technique based on SDA method desulphurization system, comprise the emergency pool 1, Pulp pump 5 and the vibratory sieve 7 that are connected successively by slurries feed back pipe 4, described emergency pool 1 is Joining Technology digestion water pipe 8 and slurry feed pipe 3 in addition, the other end of slurry feed pipe 3 connects overfall and the evacuation port of slurries top tank, digester and serum pot, and the Desulphurization receiving opening 12 at emergency pool 1 top connects desulfurizing tower cinder-discharging port by pipeline.
Technique digestion water pipe 8 arranges flowmeter 10 and technique digestion Water flow adjusting valve 11, technique digestion discharge stop valve 9, is to reach flexible modulation loop slurry concentration object, regulating according to Desulphurization discharge quantity to fresh water (FW) pushing quantity.
In emergency pool 1, liquid level gauge is installed, the liquid level of loop slurry in emergency pool 1 can be shown, and control the object of slurries amount in Desulphurization discharge quantity and technique digestion water yield realization control emergency pool 1 by control system.
Be provided with mixer 2 in emergency pool 1, ensure that the slurry agitation in pond is even, avoid alluvial.
Pulp pump 5 adopts a-worker-a-backup to design, and under guaranteeing that accident conditions appear in a Pulp pump 5, another Pulp pump 5 can complete function loop slurry being promoted to vibratory sieve 7.Be provided with residual cake valve 6 after Pulp pump 5, to facilitate the impurity got rid of in slurries, prevent silting.
The Desulphurization charging aperture 12 at emergency pool 1 top, is closely connected with desulfurizing tower ash-discharging device by pipeline, ensures that Desulphurization directly enters emergency pool 1, avoids dust to produce.Present invention eliminates the ash conveying device under desulfurizing tower in former desulphurization system, not only reduce investment outlay, and decrease a product dirt pits, effectively improve desulfurization island and environment around.
Claims (6)
1., based on a loop slurry technique for SDA method desulphurization system, the emergency pool of desulphurization system is double does blending tank in serum recycle system and recycle slurry flow container, it is characterized in that, comprises the steps:
1) Desulphurization unloaded from desulfurizing tower ash bucket enters emergency pool by Desulphurization receiving opening, with digest the digestion water that water pipe transports from technique and mix, loop slurry is made under the abundant stirring action of mixer, be transported on vibratory sieve by Pulp pump, enter slurries top tank after filtration, finally enter atomizer and participate in desulphurization reaction;
2) when desulphurization system breaks down or be in inspecting state, overflow and emptying slurries in the tank of top, enter emergency pool by slurry feed pipe, starts mixer simultaneously and avoid slurries to deposit;
3) when desulphurization system is recovered normally to work, by Pulp pump, the slurries in emergency pool are delivered on vibratory sieve by slurries feed back pipe, re-start circulation.
2. a kind of loop slurry technique based on SDA method desulphurization system according to claim 1, it is characterized in that, described desulfurizing tower is rotary spraying and drying absorption tower.
3. a kind of loop slurry technique based on SDA method desulphurization system according to claim 1, it is characterized in that, the slurries amount in described emergency pool is shown by liquid level gauge, and is regulated by control system control grout control valve.
4. a kind of loop slurry technique based on SDA method desulphurization system according to claim 1, it is characterized in that, described technique digestion water pipe is provided with the flowmeter, flow control valve and the flow stop valve that are connected with control system, regulates pushing quantity according to Desulphurization discharge quantity.
5. a kind of loop slurry technique based on SDA method desulphurization system according to claim 1, is characterized in that, described Pulp pump adopts a-worker-a-backup, and the slurries feed back pipe after Pulp pump is provided with residual cake valve.
6. for realizing the device of a kind of loop slurry technique based on SDA method desulphurization system according to claim 1, it is characterized in that, comprise the emergency pool, Pulp pump and the vibratory sieve that are connected successively by slurries feed back pipe, the other Joining Technology digestion water pipe of described emergency pool and slurry feed pipe, the other end of slurry feed pipe connects overfall and the evacuation port of slurries top tank, digester and serum pot, and the Desulphurization receiving opening at emergency pool top connects desulfurizing tower cinder-discharging port by pipeline.
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Cited By (3)
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| CN105709586A (en) * | 2016-04-13 | 2016-06-29 | 中冶焦耐工程技术有限公司 | Solution preparation and supplying method and device for coking furnace flue gas desulfurization system |
| CN106110867A (en) * | 2016-08-12 | 2016-11-16 | 攀枝花市九鼎智远知识产权运营有限公司 | A kind of heat-engine plant desulfurized fuming device |
| CN115156240A (en) * | 2022-07-22 | 2022-10-11 | 广东同创科鑫环保有限公司 | Method for resource utilization of desulfurized fly ash |
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| CN105709586A (en) * | 2016-04-13 | 2016-06-29 | 中冶焦耐工程技术有限公司 | Solution preparation and supplying method and device for coking furnace flue gas desulfurization system |
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| CN106110867A (en) * | 2016-08-12 | 2016-11-16 | 攀枝花市九鼎智远知识产权运营有限公司 | A kind of heat-engine plant desulfurized fuming device |
| CN115156240A (en) * | 2022-07-22 | 2022-10-11 | 广东同创科鑫环保有限公司 | Method for resource utilization of desulfurized fly ash |
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Application publication date: 20141224 |