CN206454471U - A kind of coal-fired flue gas mercury removal system - Google Patents
A kind of coal-fired flue gas mercury removal system Download PDFInfo
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- CN206454471U CN206454471U CN201720061290.XU CN201720061290U CN206454471U CN 206454471 U CN206454471 U CN 206454471U CN 201720061290 U CN201720061290 U CN 201720061290U CN 206454471 U CN206454471 U CN 206454471U
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Abstract
Unit, solid-phase adsorbent injection unit, mercury emissions on-line monitoring unit and system control unit is added dropwise the utility model discloses a kind of coal-fired flue gas mercury removal system, including halide salt solution；The halide salt solution is added dropwise unit and connected with the entrance of coal unit；The solid-phase adsorbent injection unit is arranged in the flue in coal unit；The mercury emissions on-line monitoring unit is arranged on the fume emission mouthful of coal-fired flue gas mercury removal system；The system control unit is added dropwise unit, solid-phase adsorbent injection unit and mercury emissions on-line monitoring unit by cable and halide salt solution and is connected.The group technology of technology and solid-phase adsorbent spraying technique is added dropwise using halide salt solution for the utility model, and monitor the Controlling operation method that unit and system control unit are automatically adjusted in real time on-line using mercury, realize the discharge of 24 hours automatically-controlled continuous Mercury In Coal Combustion Flue Gas of industrial processes.
Description
Technical field
The utility model belongs to purifying coal-fired flue gas technical field, specially a kind of coal-fired flue gas mercury removal system.
Background technology
The pollution of coal-fired flue-gas mercury emissions causes international concern, in October, 2013 China's signature increasingly《Minamata on mercury is public
About》, propose control and reduce mercury emission, opened first from industries such as PVC productions, small-scale and manual gold mining and coal fired power generations
Begin to cut down mercury emission.In April, 2016, the Standing Committee of the National People's Congress has been approved by passing through《Minamata pact on mercury》, China into
For《Minamata pact on mercury》The 30th contracting party.
At present, the domestic special removing means do not put into commercial operation actually also for mercury control, most of to grind
It is all to utilize existing pollutant catabolic gene facility to study carefully, and deduster and desulfurization unit etc. realize collaboration emission reduction, but the effect of collaboration emission reduction
Fruit suffers from the influence of itself operating mode of pollutant catabolic gene facility, and the effect of demercuration is also limited.
Publication No. CN 201410529219 patent document, discloses a kind of reduction coal-fired plant flue gas mercury emissions
Control method, it controls mercury emissions by the way of halide salt solution sprays and solid-phase adsorbent sprays synchronization implementation, artificial meter
Regulating system material addition is calculated, and is not equipped with automatic control system, labor intensive, it is impossible to industry spot is realized 24 hours automatically
Operation；Furthermore, halide salt solution is added using spray regime in documents, and the liquid spray of injection is easy to by device interior
Directly discharge after positive seal wind is taken away, can cause unnecessary waste.
Therefore, this programme provides a kind of halide salt solution dropwise addition technology and combines work with the demercuration of solid-phase adsorbent spraying technique
Skill, the data that unit is measured are monitored on-line with reference to mercury, and according to the real-time mercury concentration discharge situation of power plant, regulation halide salt solution drop
The emitted dose of dosage and solid phase adsorption dosage, to reach the qualified discharge of mercury concentration, while saving operating cost to the full extent.
Utility model content
For the shortcoming or deficiency of above-mentioned prior art, the technical problems to be solved in the utility model is to provide a kind of use
The coal-fired flue gas mercury removal system that technology, solid-phase adsorbent spraying technique and mercury monitor unit on-line is added dropwise in halide salt solution.
In order to solve the above technical problems, the utility model has following composition：
A kind of coal-fired flue gas mercury removal system, including list is added dropwise for the halide salt solution that halide salt solution is added dropwise to coal unit
Member, to coal-fired flue-gas spray solid-phase adsorbent solid-phase adsorbent injection unit, in real time monitoring discharge flue gas in element mercury and from
The mercury emissions on-line monitoring unit and system control unit of sub- mercury concentration；The halide salt solution dropwise addition unit and coal unit
Entrance is connected；The solid-phase adsorbent injection unit is arranged in the flue in coal unit；The mercury emissions are supervised online
Survey the fume emission mouthful that unit is arranged on coal-fired flue gas mercury removal system；The system control unit is dripped by cable and halide salt solution
Plus unit, solid-phase adsorbent injection unit and mercury emissions on-line monitoring unit connection.
Unit, which is added dropwise, in the halide salt solution includes fluid reservoir, and is successively set on the pipeline connected with the fluid reservoir
Metering conveying pump, for read flow convey signal flowmeter, pressure gauge and electricity for reflecting pipeline pressure
Control valve；The metering conveying pump, flowmeter, pressure gauge and electrically-controlled valve are connected with system control unit；The fluid reservoir outflow
Halide salt solution sequentially pass through metering conveying pump, flowmeter, pressure gauge and electrically-controlled valve and be constantly added dropwise in coal unit.
Unit, which is added dropwise, in the halide salt solution also includes hand-operated valve, in normal operating conditions, and the hand-operated valve is opened；In system
When safeguarding, hand-operated valve described in manual-lock.
The pipeline that the halide salt solution is added dropwise in unit is made of polytetrafluoroethylene (PTFE) or perfluoroalkoxy resin.
Pipeline between the electrically-controlled valve and coal unit is made of Hastelloy or Inconel 625.
The solid-phase adsorbent injection unit includes the interior storage bin provided with material position warning device, blanking measurement device, inhaled
Attached dose of spray gun and the first blower fan；The bottom of the storage bin sets blanking measurement device；The adsorbent spray gun passes through pipeline
It is connected with blanking measurement device；First blower fan is arranged on the pipeline being connected with the blanking measurement device and adsorbent spray gun
Charging termination.
The solid-phase adsorbent injection unit also includes the feeding device for being used to hold pocket；The feeding device passes through pipe
Road is connected with storage bin；The pocket is promoted in feeding device through electric lifting device；After the sealing of the pocket is opened,
Solid-phase adsorbent contained therein is scattered to the discharging opening of the feeding device by gravity；The discharging opening of the feeding device
Place is additionally provided with the second blower fan.
The coal unit, the coal unit includes at least one feeder, and connection corresponding with the feeder is extremely
A few coal pulverizer, and the boiler being connected with the coal pulverizer；The branch of unit is added dropwise with the halide salt solution for the feeder
Road correspondence is connected.
The coal unit also include be successively set in flue to flue gas carry out denitration process denitration unit,
Air preheater, deduster, the chimney that is carried out by the wet desulphurization unit of desulfurization process and is arranged at exhaust opening for flue gas, institute
State setting solid-phase adsorbent injection unit at the import or export flue of air preheater；Mercury is set at the exhaust opening of the chimney
Discharge online monitoring unit.It is preferred that, solid-phase adsorbent injection unit is set at the exhaust pass of the air preheater.
Compared with prior art, the utility model has the following technical effect that：The utility model is added dropwise using halide salt solution
The group technology of technology and solid-phase adsorbent spraying technique, and utilize mercury on-line monitoring unit real-time measuring data, pass through system
The mode of the real-time auto-adjustment control operation of control unit, to realize the coal-fired cigarette of 24 hours automatically-controlled continuous of industrial processes
The discharge of mercury in gas.
Brief description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, the application's is other
Feature, objects and advantages will become more apparent upon：
Fig. 1：The utility model coal-fired flue gas mercury removal system schematic；
Fig. 2：Cellular construction schematic diagram is added dropwise in halide salt solution in the utility model；
Fig. 3：Solid-phase adsorbent injection unit structural representation in the utility model.
Embodiment
The technique effect of design of the present utility model, concrete structure and generation is made furtherly below with reference to accompanying drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
As shown in figure 1, unit 10, solid phase adsorption is added dropwise in the utility model coal-fired flue gas mercury removal system, including halide salt solution
Agent injection unit 20, mercury emissions on-line monitoring unit 30 and system control unit 40, the halide salt solution be added dropwise unit 10 with
The entrance connection of coal unit 50；The solid-phase adsorbent injection unit 20 is arranged in the flue in coal unit 50；
The mercury emissions on-line monitoring unit 30 is arranged on the fume emission mouthful of coal-fired flue gas mercury removal system, the system control unit 40
Unit 10, solid-phase adsorbent injection unit 20 and mercury emissions on-line monitoring unit 30 is added dropwise by cable and halide salt solution to connect
Connect.
The coal unit 50, the coal unit 50 includes at least one feeder 51, corresponding with the feeder 51
At least one coal pulverizer 52 of connection, and the boiler 53 being connected with the coal pulverizer 52；The feeder 51 and the halogen
The branch road correspondence that unit 10 is added dropwise in solution is connected.
The coal unit 50 also includes being successively set on the denitration unit for carrying out flue gas in flue denitration process
54th, air preheater 55, deduster 56, to flue gas carry out desulfurization process wet desulphurization unit 57 and be arranged at exhaust opening
Chimney 58, solid-phase adsorbent injection unit 20, the present embodiment are set at the import or export flue of the air preheater 55
In, the solid-phase adsorbent injection unit 20 is preferably provided at the exhaust pass of air preheater 55；The row of the chimney 58
Mercury emissions are set to monitor unit 30 on-line at mouth.
Unit 10, which is added dropwise, in the halide salt solution is used to halide salt solution, the solid-phase adsorbent injection is added dropwise to coal unit 50
Unit 20 can spray coal-fired flue-gas solid-phase adsorbent, and the mercury emissions on-line monitoring unit 30 can be monitored in discharge flue gas in real time
Element mercury and ionic mercury concentration.The combination work of technology and solid-phase adsorbent spraying technique is added dropwise using halide salt solution for the utility model
Skill, and monitor unit real-time measuring data, the side by the real-time auto-adjustment control operation of system control unit on-line using mercury
Formula, to realize the discharge of 24 hours automatically-controlled continuous Mercury In Coal Combustion Flue Gas of industrial processes.
As shown in Fig. 2 unit 10, which is added dropwise, in the halide salt solution includes fluid reservoir 11, and it is successively set on and the liquid storage
Tank 11 connect pipeline on metering conveying pump 12, for read flow conveying signal flowmeter 13, for reflecting that pipeline is defeated
Pressure gauge 14, electrically-controlled valve 15 and the hand-operated valve 16 of pressurization pressure；The metering conveying pump 12, flowmeter 13, pressure gauge 14 and
Electrically-controlled valve 15 is connected with system control unit 40；The halide salt solution that the fluid reservoir 11 is discharged sequentially pass through metering conveying pump 12,
Flowmeter 13, pressure gauge 14 and electrically-controlled valve 15 are constantly added dropwise in coal unit 50.It is described manual in normal operating conditions
Valve 16 is opened, in system maintenance, hand-operated valve 16 described in manual-lock.The halide salt solution is added dropwise unit 10 and may insure halogen
Solution accurately quantitatively conveying and safe operation.
Unit 10 is added dropwise when halide salt solution is added dropwise in halide salt solution, and system control unit 40 controls electrically-controlled valve 15 to open simultaneously
Open, the actual flow signal of reading is transported to system control unit 40 by flowmeter 13.The system control unit 40 is by reading
The unit coal-supplying amount signal taken, and the concentration value that unit 30 measures obtained element mercury and ionic mercury is monitored on-line according to mercury, meter
Solution addition is calculated, and to the command signal of the transmission feed flow of metering conveying pump 12.The pressure gauge 14 is used to reflect pipeline
Discharge pressure, when pressure is excessive, the pressure gauge 14 sends alarm signal, and simultaneity factor control unit 40 closes metering conveying
Pump 12 and electrically-controlled valve 15, the halide salt solution are added dropwise unit 10 and are stopped.
The hand-operated valve 16 is typically in normally open, can manual-lock when front end system needs to safeguard.
The halide salt solution dropwise addition unit 10 is using injection rather than injection halide salt solution is added dropwise, using dropwise addition injection mode
It can ensure that halide salt solution and coal are directly mixed；If adding halide salt solution using spray regime, the liquid spray of injection is set
Standby internal positive pressure sealing air takes away direct discharge, causes unnecessary waste.
As a further improvement, the halide salt solution be added dropwise pipeline in unit 10 using polytetrafluoroethylene (PTFE) (PTFE) or
Perfluoroalkoxy resin (PFA) is made, the features such as PTFE or PFA have corrosion-resistant, high-low temperature resistant；The He of electrically-controlled valve 15
Pipeline between coal unit 50 is made of Hastelloy or Inconel 625, and the Hastelloy or Inconel 625 have
There is wear-resisting, corrosion-resistant performance.
The halide salt solution is prepared from using calcium bromide or calcium chloride etc..
As shown in figure 3, the solid-phase adsorbent injection unit 20 includes storage bin 21, blanking measurement device 22, at least one
Individual adsorbent spray gun 23, the first blower fan 24 and the feeding device 25 for holding pocket 26, the number of the adsorbent spray gun 23
Measure as 4-12, preferably 8, it is possible to appropriate increase or less is carried out according to actual conditions.
The feeding device 25 is connected by pipeline with storage bin 21, and the pocket 26 is promoted to through electric lifting device
Expect in device 25；After the sealing of the pocket 26 is opened, solid-phase adsorbent contained therein is scattered to described by gravity
The discharging opening of feeding device 25；The discharge outlet of the feeding device 25 is additionally provided with the second blower fan, is produced by the second blower fan
Solid-phase adsorbent is delivered in storage bin 21 by compressed air.The feeding device 25 can realize live automatic discharging, and be not required to
Feed supplement is carried out by the way of tank car, automaticity is high, and saves labour etc..
The bottom of the storage bin 21 sets blanking measurement device 22.The adsorbent spray gun 23 passes through pipeline and blanking meter
Amount device 22 is connected；First blower fan 24 is arranged on the pipeline being connected with the blanking measurement device 22 and adsorbent spray gun 23
Charging termination, solid-phase adsorbent is delivered to adsorbent spray gun 23 by the compressed air produced by the first blower fan 24, described solid
Phase adsorbent is through the injection of adsorbent spray gun 23 with coal-fired flue-gas pipeline, and being chemically reacted with the mercury in flue gas.
Material position warning device is additionally provided with the storage bin 21, it is described after the material position of solid-phase adsorbent is less than setting value
Material position warning device sends alarm signal, notifies operating personnel to carry out feed supplement.
The solid-phase adsorbent is using carbon-based adsorbents such as bromination activated carbons.
Element mercury, ionic mercury concentration in the real time measure smoke stack emission flue gas of mercury emissions on-line monitoring system 30, and
System control unit 40 is transferred to, by system control unit 40 according to gas mercury concentration value and unit operation parameter, feedback control
The material addition of solid-phase adsorbent injection unit 20.
The system control unit 40 gathers unit operational factor, coal-supplying amount, load, exhaust gas volumn, the flue gas of such as feeder
Start and stop and the dripping quantity of unit 10, and sorbent injection is added dropwise in mercury emissions form and concentration etc., then feedback regulation halide salt solution
The emitted dose of unit 20, finally makes tail flue gas mercury emissions reach desired value.
The halide salt solution that the halide salt solution is added dropwise in unit 10 is constantly added dropwise on the coal seam in feeder 51, then
The coal of dropwise addition halide salt solution, which is transported in coal pulverizer 52, to carry out being pulverized and mixed processing, and the broken mixed process is also beneficial to halogen
Solution and coal are sufficiently mixed；Then the coal being pulverized and mixed is admitted to boiler 53 and burnt, and halide salt solution makes the element mercury in flue gas
It is changed into ion state mercury, the ion state mercury is subsequently further removed by deduster 56 and wet desulphurization unit 57.The solid phase is inhaled
The adsorbent that attached dose of injection unit 20 sprays is sprayed into after flue, is mixed quickly with flue gas, during adsorbent and mercury contact,
Absorption and course of reaction are completed, the deduster 56 that the solid-phase adsorbent of mercury is arranged in pipeline is then adsorbed with and traps, so
Afterwards by wet desulphurization unit 57, the mercury in the flue gas is last from chimney 58 is discharged into air after being removed.
Embodiment：
The embodiment is merely to illustrate the applicable cases of the patent, is not intended to limit the use scope of the utility model patent.
The utility model is applied to 300MW Thermal generation units, according to its actual smoke mercury emission level, system design bromine
Change calcium solution and unit transportation ability 0-30kg/h (each branch road), bromination activated carbon injection unit conveying capacity 13.5- is added dropwise
150kg/h。
The halide salt solution is added dropwise unit 10 and includes 5 branch roads, respectively with corresponding No. 1 feeder 51, No. 2 feeders 51,3
Number feeder 51, No. 4 feeders 51, No. 5 feeders 51 are connected, to realize that branch is added dropwise in the corresponding halide salt solution of different feeders 51
The independent control on road.The halide salt solution addition of each branch road is calculated in real time according to the coal-supplying amount of correspondence feeder 51, then is passed through
System control unit 40 feeds back and controls the solution conveying capacity of metering conveying pump 12.Pass through the utility model coal-fired flue gas mercury removal system
System, can be by unit smoke mercury emission concentration from 20ug/m3It is reduced to 1ug/m3(annual average).
When smoke mercury emission concentration is relatively low, it may only need operation halide salt solution that unit 10, ion state mercury is added dropwise
Pass through the cooperation-removal of wet desulphurization unit 57, it becomes possible to realize that tail flue gas mercury emissions concentration is up to standard.And work as smoke mercury emission
It is simple to rely on cooperation-removal mercury then be up to standard when concentration is higher, now then need that unit 10 and solid phase is added dropwise using adsorbent
Sorbent injection unit 20 is run simultaneously, can just make its qualified discharge, thus system can the flexible modulation method of operation, to realize group
Close the economical operation of technique.
The group technology of technology and solid-phase adsorbent spraying technique is added dropwise using halide salt solution for the utility model, for fire coal
Smoke mercury emission is controlled, and not only be make use of the cooperation-removal of fume treatment facility to act on, is also equipped with special absorption demercuration
Device, while being equipped with full-automatic control system, is greatly saved the input of manpower and materials, convenient management, and can realize industrial life
The discharge of 24 hours automatically-controlled continuous Mercury In Coal Combustion Flue Gas of production process.
Above example is only non-limiting to illustrate the technical solution of the utility model, reference only to preferred embodiment pair
The utility model is described in detail.It will be understood by those within the art that, can be to technology of the present utility model
Scheme is modified or equivalent substitution, without departing from the spirit and scope of technical solutions of the utility model, all should be covered in this reality
With in new right.
Claims (9)
1. a kind of coal-fired flue gas mercury removal system, it is characterised in that
Including unit (10) is added dropwise for the halide salt solution of halide salt solution to be added dropwise to coal unit (50), sprays solid to coal-fired flue-gas
The mercury emissions of element mercury and ionic mercury concentration in the solid-phase adsorbent injection unit (20) of phase adsorbent, the flue gas of monitoring discharge in real time
Monitor unit (30) and system control unit (40) on-line；
The halide salt solution is added dropwise unit (10) and connected with the entrance of coal unit (50)；The solid-phase adsorbent injection unit
(20) it is arranged in the flue in coal unit (50)；
The mercury emissions on-line monitoring unit (30) is arranged on the fume emission mouthful of coal-fired flue gas mercury removal system；
Unit (10), solid-phase adsorbent injection unit (20) is added dropwise by cable and halide salt solution in the system control unit (40)
And mercury emissions on-line monitoring unit (30) connection.
2. coal-fired flue gas mercury removal system according to claim 1, it is characterised in that
Unit (10), which is added dropwise, in the halide salt solution includes fluid reservoir (11), and is successively set on and is connected with the fluid reservoir (11)
Pipeline on metering conveying pump (12), for read flow conveying signal flowmeter (13), for reflecting pipeline pressure
The pressure gauge (14) and electrically-controlled valve (15) of power；
The metering conveying pump (12), flowmeter (13), pressure gauge (14) and electrically-controlled valve (15) and system control unit (40)
Connection；
The halide salt solution of fluid reservoir (11) outflow sequentially passes through metering conveying pump (12), flowmeter (13), pressure gauge (14)
And electrically-controlled valve (15) is constantly added dropwise in coal unit (50).
3. coal-fired flue gas mercury removal system according to claim 2, it is characterised in that unit (10) is added dropwise in the halide salt solution
Also include hand-operated valve (16), in normal operating conditions, the hand-operated valve (16) is opened；In system maintenance, described in manual-lock
Hand-operated valve (16).
4. coal-fired flue gas mercury removal system according to claim 2, it is characterised in that unit (10) is added dropwise in the halide salt solution
In pipeline be made of polytetrafluoroethylene (PTFE) or perfluoroalkoxy resin.
5. the coal-fired flue gas mercury removal system according to Claims 2 or 3 or 4, it is characterised in that the electrically-controlled valve (15) and combustion
Pipeline between coal unit (50) is made of Hastelloy or Inconel 625.
6. coal-fired flue gas mercury removal system according to claim 1 or 2, it is characterised in that
The solid-phase adsorbent injection unit (20) includes interior storage bin (21), the blanking measurement device for being provided with material position warning device
(22), adsorbent spray gun (23) and the first blower fan (24)；
The bottom of the storage bin (21) sets blanking measurement device (22)；
The adsorbent spray gun (23) is connected by pipeline with blanking measurement device (22)；
First blower fan (24) is arranged on the pipeline that is connected with the blanking measurement device (22) and adsorbent spray gun (23)
Feed termination.
7. coal-fired flue gas mercury removal system according to claim 6, it is characterised in that
The solid-phase adsorbent injection unit (20) also includes the feeding device (25) for being used to hold pocket (26)；
The feeding device (25) is connected by pipeline with storage bin (21)；
The pocket (26) is promoted in feeding device (25) through electric lifting device；
After the sealing of the pocket (26) is opened, solid-phase adsorbent contained therein is scattered to the feeding by gravity to be filled
Put the discharging opening of (25)；
The discharge outlet of the feeding device (25) is additionally provided with the second blower fan.
8. the coal-fired flue gas mercury removal system according to claim 1 or 2 or 3 or 4 or 7, it is characterised in that the coal unit
(50) including at least one feeder (51), at least one coal pulverizer (52) of connection corresponding with the feeder (51), and
The boiler (53) being connected with the coal pulverizer (52)；The branch road of unit (10) is added dropwise with the halide salt solution for the feeder (51)
Correspondence connection.
9. coal-fired flue gas mercury removal system according to claim 8, it is characterised in that the coal unit (50) also include according to
Secondary denitration unit (54), air preheater (55), the deduster that denitration process is carried out to flue gas being arranged in smoke discharging pipe
(56), the chimney (58) that is carried out by the wet desulphurization unit (57) of desulfurization process and is arranged at exhaust opening for flue gas, the sky
Solid-phase adsorbent injection unit (20) is set at the import or export flue of air preheater (55)；The exhaust opening of the chimney (58)
Place sets mercury emissions to monitor unit (30) on-line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720061290.XU CN206454471U (en) | 2017-01-19 | 2017-01-19 | A kind of coal-fired flue gas mercury removal system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720061290.XU CN206454471U (en) | 2017-01-19 | 2017-01-19 | A kind of coal-fired flue gas mercury removal system |
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ID=59699248
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193268A (en) * | 2019-07-10 | 2019-09-03 | 北京金隅琉水环保科技有限公司 | A kind of cement kiln end smoke mercury emission real-time control system |
| CN112827313A (en) * | 2021-01-20 | 2021-05-25 | 浙江浙能嘉华发电有限公司 | Coal-fired boiler fly ash modified self-adsorption flue gas demercuration device and method |
-
2017
- 2017-01-19 CN CN201720061290.XU patent/CN206454471U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110193268A (en) * | 2019-07-10 | 2019-09-03 | 北京金隅琉水环保科技有限公司 | A kind of cement kiln end smoke mercury emission real-time control system |
| CN112827313A (en) * | 2021-01-20 | 2021-05-25 | 浙江浙能嘉华发电有限公司 | Coal-fired boiler fly ash modified self-adsorption flue gas demercuration device and method |
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