CN206566736U - Two stage cycle subregion desulfurizing tower - Google Patents

Two stage cycle subregion desulfurizing tower Download PDF

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Publication number
CN206566736U
CN206566736U CN201720085438.3U CN201720085438U CN206566736U CN 206566736 U CN206566736 U CN 206566736U CN 201720085438 U CN201720085438 U CN 201720085438U CN 206566736 U CN206566736 U CN 206566736U
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China
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annular groove
tower
plate
spraying
cycle
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CN201720085438.3U
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周冰
赵琳
周岳锋
俞水林
章涵
蔡锡锋
王少权
周超炯
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Zhejiang Feida Environmental Science and Technology Co Ltd
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Zhejiang Feida Environmental Science and Technology Co Ltd
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Abstract

The utility model discloses two stage cycle subregion desulfurizing tower, including tower body, tower body bottom is provided with primary cycle slurry spraying system, tower body top is provided with secondary cycle slurry spraying system, the secondary cycle slurry spraying system includes two grades of spraying layers, annular groove bottom plate is provided with tower body below two grades of spraying layers, the annular groove bottom plate is projected as annular in horizontal plane, the outward flange of annular groove bottom plate is fixed on tower body inwall, the inward flange of annular groove bottom plate is fixed with annular groove side plate straight up, annular groove side plate, annular groove bottom plate and tower body inwall formation annular groove, the discharge opeing case for discharging spray liquid in annular groove is further fixed on tower body.The utility model has the advantages that:Will not occur " waterfall " shape slurries area again, effectively reduce operation energy consumption, one secondary cycle slurry spraying system separates completely, the secondary cycle slurry spraying system of high ph-values is set to obtain higher desulfuration efficiency, the primary cycle slurry spraying system of low ph value improves the utilization rate of absorbent and the quality of accessory substance.

Description

Two stage cycle subregion desulfurizing tower
Technical field
The utility model is related to two stage cycle subregion desulfurizing tower.
Background technology
China requires increasingly strict to coal unit pollutant emission in recent years, has put into effect a series of major actions, has kept under strict control Air pollution emission, reinforcement atmospheric environment are administered.National Development and Reform Committee, Bureau of Energy, ministries and commissions of Chinese Ministry of Environmental Protection three are under the joint of in September, 2014 Send out " hair changes [2014] No. 2093 " file, it is desirable to the minimum discharge and reducing energy consumption of coal unit are completed before the year two thousand twenty, The Air Pollutant Emission concentration of the newly-built coal unit in eastern region is asked to basically reach coal-fired turbine emission limit, wherein SO2Row Put concentration no more than 35mg/Nm3.Sulfur removal technology at present in the world is more, and wherein limestone/lime-gypsum wet flue gas takes off Sulphur single-stage spray desulfurizing tower technique is most widely used, and occupation rate of market reaches more than 80%.It is existing when coal-fired sulfur content is relatively low Some single-stage spray desulfurizing tower technique is by increasing liquid-gas ratio (increase spray layer number or the spray flux of the existing spraying layer of increase) Ultra-clean emission request can also be met.But for coal-fired sulfur content it is higher when, single-stage spray desulfurizing tower has been difficult to meet ultra-clean discharge It is required that.
Therefore, engineers and technicians have developed single column Two-way Cycle technology, sprayed using loop slurries different two PH System washs flue gas, and higher desulfuration efficiency is obtained with this.The top of relatively low pH loop slurries spray system is provided with a slurry Liquor collecting device, for collecting higher pH slurries.
Existing single column dual-cycle plant is in actual motion, and higher pH slurries are being collected into slurries collection device process In, thick " waterfall " shape slurries area can be formed, flue gas is before high pH loop slurries spray system is reached, it is necessary to pass through " waterfall Cloth " shape slurries area, produces larger flue gas resistance.When the high pH loop slurries spray system spraying layer number of plies that puts into operation is more, slurries The flue gas resistance that collection device is produced is bigger, is substantially increased operation energy consumption.
Utility model content
The purpose of this utility model is offer two stage cycle subregion desulfurizing tower, can effectively solve the problem that existing single column Two-way Cycle The problem of slurries collection device area resistance is big.
In order to solve the above-mentioned technical problem, the utility model is achieved through the following technical solutions:Two stage cycle subregion Desulfurizing tower, including tower body, tower body bottom are provided with primary cycle slurry spraying system, and tower body top is sprayed provided with secondary cycle slurries System, the secondary cycle slurry spraying system includes being provided with ring in the tower body below two grades of spraying layers, two grades of spraying layers Trough floor, the annular groove bottom plate is in the annular that is projected as of horizontal plane, and the outward flange of annular groove bottom plate is fixed on tower body inwall, ring The inward flange of trough floor is fixed with annular groove side plate straight up, annular groove side plate, annular groove bottom plate and tower body inwall formation annular groove, tower The discharge opeing case for discharging spray liquid in annular groove is further fixed on body.
It is preferred that, the annular groove bottom plate is obliquely installed, and discharge opeing case is located at the lowest part of annular groove bottom plate;It is easy to be collected into Liquid guide flow is gone out.
It is preferred that, the angle of the annular groove bottom plate and horizontal plane is 3~20 °, and the internal diameter of annular groove bottom plate is tower body diameter 0.5~0.9 times;Ensure that slurries can flow to annular groove discharge opeing case along pendular ring groove is connect, the setting of internal diameter can also catch spray as far as possible Liquid is not affected substantially by ensureing that flue gas rises.
It is preferred that, shrouding is additionally provided with below the annular groove bottom plate, the shrouding side is connected with the inward flange of annular groove bottom plate, The opposite side of shrouding is fixed on the inwall of tower body, and the shrouding, annular groove bottom plate and tower body inwall constitute the annulus of a closing Shape;Tower body edge flue gas is set to assemble to tower body center,
It is preferred that, the annular bottom of the closing is provided with the permeability cell communicated with the tower body external world;Ensure in enclosed construction Portion by positive/negative pressure, the long-term safety operation of pendular ring groove is not connect favorably, and flue gas is obtained when entering secondary cycle slurry spraying system Good dust-removal and desulfurizing effect.
It is preferred that, the angle of the shrouding and horizontal plane is 30~60 °;Good guide angle can be carried out to flue gas, The rising resistance of flue gas will not be increased very much.
It is preferred that, slurry collecting disc is additionally provided with below the annular groove bottom plate between one-level spraying layer, the slurries are collected The diameter of disk is more than the internal diameter of annular groove bottom plate, and the bottom of slurry collecting disc is provided with slurries effuser road;The slurries left to middle part Effectively collected.
It is preferred that, the diameter of the slurry collecting disc is than the big 100~500mm of annular groove bottom plate internal diameter;Slurry collecting disc can Effectively collect the slurries of tower body central area.
Compared with prior art, the utility model has the advantages that:Due to setting in annular groove bottom plate and annular groove side plate and tower body Annular groove is formed between wall, will not occur " waterfall " shape slurries area again, flue gas is before secondary cycle slurry spraying system is reached, no The flue gas resistance for overcoming existing single column Two-way Cycle technology " waterfall " shape slurries zone is needed, operation energy consumption, annular groove is effectively reduced A secondary cycle slurry spraying system is separated a secondary cycle slurry spraying system completely and can be controlled in relatively independent difference Run under pH value, the secondary cycle slurry spraying system of high ph-values is obtained higher desulfuration efficiency, the primary cycle of low ph value Slurry spraying system improves the utilization rate of absorbent and the quality of accessory substance.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model two stage cycle subregion desulfurizing tower;
Fig. 2 is the top view of annular groove in the utility model two stage cycle subregion desulfurizing tower.
Embodiment
Refering to the embodiment that Fig. 1 is the utility model two stage cycle subregion desulfurizing tower, including tower body 1, the lower section of tower body 1 is provided with Gas approach 2, the top of tower body 1 is provided with exhanst gas outlet 3, tower body 1 starches provided with primary cycle slurry spraying system and secondary cycle Liquid spray system.
Primary cycle slurry spraying system includes one-level spraying layer 12, one-level slurry pool 4 and one-level slurry circulating pump 15, one Level spraying layer 12 is located at the top of gas approach 2 in tower body 1, and one-level spraying layer 12 is starched by one-level slurry circulating pump 15 and one-level Liquid pool 4 is connected, and one-level gypsum slurries excavationg pump 16 is connected by pipeline with the bottom of one-level slurry pool 4, for the discharge of accessory substance, First mixer 17 is provided with one-level slurry pool 4.
Demister 14, secondary cycle slurries are provided with tower body 1 between secondary cycle slurry spraying system and exhanst gas outlet 3 Spray system includes two grades of spraying layers 13, tower outer circulation slurry tank and two grades of slurry circulating pumps 19, and two grades of spraying layers 13 pass through two Level slurry circulating pump 19 is connected with tower outer circulation slurry tank, and two grades of gypsum slurries excavationg pumps 22 pass through pipeline and tower outer circulation slurries Bottom portion is connected, for the discharge of accessory substance, and two grades of agitators 20 are provided with the tower outer circulation slurry tank.
Oxidation spray gun 23 is equipped with tower outer circulation slurry tank and one-level slurry pool 4, the oxidation spray gun 23 passes through oxidation Blower fan 21 provides air.
Be provided with annular groove bottom plate 5 in the tower body 1 of the lower section of two grades of spraying layers 13, and two grades of spraying layers 13 and annular groove bottom plate 5 away from From not less than 600mm, annular groove bottom plate 5 is obliquely installed, and the angle of annular groove bottom plate 5 and horizontal plane is 3~20 °, as shown in Fig. 2 ring Trough floor 5 is in the annular that is projected as of horizontal plane, and the internal diameter of annular groove bottom plate 5 is 0.5~0.9 times of the diameter of tower body 1, annular groove bottom plate 5 outward flange is fixed on the inwall of tower body 1, and the inward flange of annular groove bottom plate 5 is fixed with annular groove side plate 6 straight up, ring groove side Plate 6, annular groove bottom plate 5 and the inwall of tower body 1 formation annular groove, the highest point of annular groove are provided with demarcation strip 24, and annular groove bottom plate 5 is by demarcation strip 24 Extended downwardly to both sides along tower body 1 with identical inclination, the discharge opeing case 8 for discharging spray liquid in annular groove, row are further fixed on tower body 1 Liquid case 8 is located at the lowest part of annular groove bottom plate 5, and slurry collecting disc 11 is additionally provided between the lower section of annular groove bottom plate 5 and one-level spraying layer 12, The diameter of the slurry collecting disc 11 is more than the internal diameter of annular groove bottom plate 5, and the diameter of slurry collecting disc 11 is bigger than the internal diameter of annular groove bottom plate 5 100~500mm, annular groove discharge opeing case 8 and slurry collecting disc 1111 are connected by pipeline 9 with tower outer circulation slurry tank 18,.
In order to be preferably oriented to rising flue gas, the lower section of annular groove bottom plate 5 is additionally provided with shrouding 7, shrouding 7 and horizontal plane Angle is 30~60 °, and the side of shrouding 7 is connected with the inward flange of annular groove bottom plate 5, and the opposite side of shrouding 7 is fixed on the inwall of tower body 1 On, the shrouding 7, annular groove bottom plate 5 and the inwall of tower body 1 constitute the annular of a closing, the annular bottom of closing be provided with The permeability cell 10 that the external world of tower body 1 is communicated.
Former flue gas enters tower body 1 by desulfurizing tower smoke inlet, the lower ph (4.6- provided through one-level spraying layer 12 5.8) countercurrent spray is washed, removing major part SO2, one-level slurry pool 4 is fallen into the slurries after smoke reaction, through one-level spraying layer After flue gas after 12 spray washings is by slurry collecting disc 11, truncated cone-shaped shrouding 7 and annular groove side plate 6, into secondary cycle slurries Spray system, higher ph (5.8-6.8) countercurrent spray that flue gas is provided when rising through two grades of spraying layers 13 is washed, further Scrubbing CO_2, two grades of spraying layers 13 fall slurries and are divided into two parts collection, and the slurries close to tower wall fringe region are by ring What trough floor 5, annular groove side plate 6, demarcation strip 24 were constituted connects the collection of pendular ring groove, and flows out tower body from the annular groove discharge opeing case 8 of lowest part 1, slurry circulation case 18 outside tower is entered after closed conduit 9.Slurries close to tower central area are collected by slurry collecting disc 11, are flowed Go out tower body 1, slurry circulation case 18 outside tower is entered after closed conduit 9.Flue gas after being washed through two-stage passes through the demisting of demister 14 Discharged afterwards from exhanst gas outlet 3.
" waterfall " shape slurries area is not present in the slurries collection device constituted by connecing pendular ring groove and slurry collecting disc, with existing list Tower Two-way Cycle technology is compared, and can effectively reduce the flue gas resistance of Desulfurization tower slurry collection device, reduces operation energy consumption.Connect pendular ring Groove makes a secondary cycle slurry spraying system separate completely, a secondary cycle slurry spraying system can be controlled in it is relatively independent not Run with pH value, the secondary cycle slurry spraying system of higher ph is obtained higher desulfuration efficiency, the one of lower ph Level loop slurry spray system improves the utilization rate of absorbent and the quality of accessory substance.
Specific embodiment of the utility model is the foregoing is only, but technical characteristic of the present utility model is not limited to This, any those skilled in the art is in field of the present utility model, and the change or modification made all are covered new in this practicality Among the scope of the claims of type.

Claims (8)

1. two stage cycle subregion desulfurizing tower, including tower body (1), tower body (1) bottom are provided with primary cycle slurry spraying system, tower body (1) top is provided with secondary cycle slurry spraying system, and the secondary cycle slurry spraying system includes two grades of spraying layers (13), its It is characterised by:Annular groove bottom plate (5) is provided with tower body (1) below two grades of spraying layers (13), the annular groove bottom plate (5) is in water Plane is projected as annular, and the outward flange of annular groove bottom plate (5) is fixed on tower body (1) inwall, the inward flange of annular groove bottom plate (5) It is fixed with annular groove side plate (6) straight up, annular groove side plate (6), annular groove bottom plate (5) and tower body (1) inwall formation annular groove, tower body (1) the discharge opeing case (8) for discharging spray liquid in annular groove is further fixed on.
2. two stage cycle subregion desulfurizing tower as claimed in claim 1, it is characterised in that:The annular groove bottom plate (5) is obliquely installed, Discharge opeing case (8) is located at the lowest part of annular groove bottom plate (5).
3. two stage cycle subregion desulfurizing tower as claimed in claim 2, it is characterised in that:The annular groove bottom plate (5) and horizontal plane Angle is 3~20 °, and the internal diameter of annular groove bottom plate (5) is 0.5~0.9 times of tower body (1) diameter.
4. two stage cycle subregion desulfurizing tower as claimed in claim 1, it is characterised in that:Also set below the annular groove bottom plate (5) There is shrouding (7), shrouding (7) side is connected with the inward flange of annular groove bottom plate (5), and the opposite side of shrouding (7) is fixed on tower body (1) on inwall, the shrouding (7), annular groove bottom plate (5) and tower body (1) inwall constitute the annular of a closing.
5. two stage cycle subregion desulfurizing tower as claimed in claim 4, it is characterised in that:The annular bottom of the closing is provided with The permeability cell (10) communicated with tower body (1) external world.
6. two stage cycle subregion desulfurizing tower as claimed in claim 4, it is characterised in that:The shrouding (7) and the folder of horizontal plane Angle is 30~60 °.
7. two stage cycle subregion desulfurizing tower as claimed in claim 2, it is characterised in that:With one below the annular groove bottom plate (5) Slurry collecting disc (11) is additionally provided between level spraying layer (12), the diameter of the slurry collecting disc (11) is more than annular groove bottom plate (5) Internal diameter, the bottom of slurry collecting disc (11) is provided with slurries effuser road.
8. two stage cycle subregion desulfurizing tower as claimed in claim 7, it is characterised in that:The diameter of the slurry collecting disc (11) Than annular groove bottom plate (5) big 100~500mm of internal diameter.
CN201720085438.3U 2017-01-23 2017-01-23 Two stage cycle subregion desulfurizing tower Active CN206566736U (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110124501A (en) * 2019-05-17 2019-08-16 中国神华能源股份有限公司 Flue gas purification system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110124501A (en) * 2019-05-17 2019-08-16 中国神华能源股份有限公司 Flue gas purification system and method

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