CN110395699A - The technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent - Google Patents
The technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent Download PDFInfo
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- CN110395699A CN110395699A CN201910701538.8A CN201910701538A CN110395699A CN 110395699 A CN110395699 A CN 110395699A CN 201910701538 A CN201910701538 A CN 201910701538A CN 110395699 A CN110395699 A CN 110395699A
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- Prior art keywords
- sulfur dioxide
- hygroscopic agent
- desulfurization slag
- autoclave body
- calcium hydroxide
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 54
- 230000023556 desulfurization Effects 0.000 title claims abstract description 52
- 239000003230 hygroscopic agent Substances 0.000 title claims abstract description 44
- 239000002893 slag Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004064 recycling Methods 0.000 title claims abstract description 24
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 title claims abstract description 23
- 239000000920 calcium hydroxide Substances 0.000 title claims abstract description 23
- 229910001861 calcium hydroxide Inorganic materials 0.000 title claims abstract description 23
- 239000006227 byproduct Substances 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 53
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000011084 recovery Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000003546 flue gas Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
- B01J20/046—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium containing halogens, e.g. halides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/20—Halides
- C01F11/24—Chlorides
- C01F11/28—Chlorides by chlorination of alkaline-earth metal compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The invention belongs to chemical technology fields, and in particular to the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent.The technique includes: step 1: the desulfurization slag that calcium hydroxide desulfurization obtains being placed in reaction kettle, then sulfur dioxide releasing agent is added in reaction kettle, is stirred to react, reaction temperature is 40~50 DEG C, and the sulfur dioxide releasing agent is hydrochloric acid；Step 2: the SO that step 1 reaction is generated2Gas is delivered to SO2In holding vessel, after reaction, pH value is 7 in reaction kettle, and reaction kettle autoclave body is discharged by deslagging pump in the residue of reactor bottom.Using the method for the present invention, both SO can be obtained to processing recycling is carried out in desulfurization slag2, by-product hygroscopic agent can also be obtained, preparing hygroscopic agent, cost is relatively low, and the purity of hygroscopic agent can reach 99%.Recycle obtained SO2Purity is high can reach 98%~99%.
Description
Technical field
The invention belongs to chemical technology fields, and in particular to calcium hydroxide desulfurization slag recycles sulfur dioxide by-product hygroscopic agent
Technique.
Background technique
It can be generated in industrial production largely containing SO2Flue gas, SO2The primary pollution source of atmosphere, it is therefore desirable to flue gas into
Row desulfurization process.According to desulfurizing agent and the form of desulfurization slag, sulfur removal technology generally can be divided into wet process, dry method and semidry method etc., this
A little techniques would generally generate a large amount of not tractable desulfurization slags.Utilization to desulfurization slag, technical staff constantly study, exploitation
Desulfurization slag is such as applied to building materials field, waste water treatment, agriculture field (Lu Lijun, Fang Hong by many desulfurization slag utilization technologies out
Brightness, Zhu Shujing etc. semi-dry process flue gas desulphurization slag research of utilization status [J] Wuhan Iron and Steel Plant technology, 2012,50 (2): 54-
58.).It there is no at present and regenerate SO using desulfurization slag2Technique.
Although regenerating desulfurization technology can be by SO in flue gas2It removes and generates SO2, only generate a small amount of waste.It is such as renewable
Inorganic buffer solution desulfurization technology absorbs SO using inorganic buffer solution2, release SO is then desorbed by high-temperature steam2, but should
The SO that technique recycles2In contain moisture, product is impure, and a large amount of desulfurizing agents and steam are needed in technical process, cost mistake
It is high.
Summary of the invention
The present invention provides a kind of technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent, and the technique is by SO2
The desulfurization slag reaction that releasing agent and calcium hydroxide desulfurization obtain, by the SO of generation2Recycling, and by-product obtains hygroscopic agent.
The present invention specifically uses following technical scheme:
The technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent, comprising the following steps:
Step 1: the desulfurization slag that calcium hydroxide desulfurization obtains being placed in reaction kettle, sulfur dioxide is then added into reaction kettle and releases
Agent is put, is stirred to react, reaction temperature is 40~50 DEG C, and the sulfur dioxide releasing agent is hydrochloric acid；
Before desulfurization, first calcium hydroxide slurry is filtered, removes solid impurity therein, obtains the hydroxide that concentration is 10%~15%
Calcium solution reuses the solution and carries out desulfurization, and to improve desulfuration efficiency, the main component of gained desulfurization slag is also more single, is
Calcium sulfite.
Step 2: the SO that step 1 reaction is generated2Gas is delivered to SO2In holding vessel, after reaction, pH in reaction kettle
Value is 7, and reaction kettle autoclave body is discharged by deslagging pump in the residue of reactor bottom.
Further, further include being separated by solid-liquid separation the residue of step 2 discharge reaction kettle autoclave body by filter press, return
It receives solid and obtains hygroscopic agent.
Further, the mass ratio of the material of sulfate radical is in the amount and desulfurization slag of the substance of HCl in hydrochloric acid described in step 1
2:1。
Further, CaSO in desulfurization slag described in step 13Percentage composition be 95% or more.
Further, the reaction carries out in sulfur dioxide recovery device, and the sulfur dioxide recovery device includes anti-
Kettle is answered, the reaction kettle includes autoclave body, and the autoclave body top side is provided with sulfur dioxide releasing agent and mouth and sulfur dioxide is added
Outlet, the other side are provided with material inlet, and the sulfur dioxide outlet is connected with compressor, and compressor is connected with holding vessel, institute
The screw conveyor that material inlet is connected with transferring raw material is stated, autoclave body bottom is provided with hygroscopic agent outlet, the hygroscopic agent outlet
It is connected to one end of deslagging pump, the other end of deslagging pump is connected with filter press.
Further, the autoclave body is cylindrical shape, and autoclave body bottom is provided with support.
Further, it is provided with blender at the autoclave body top center, the output end of blender protrudes into autoclave body.
Further, fixed frame is provided on the autoclave body outer wall, the fixed frame bottom is fixedly connected with support, described
Around equipped with infrared heating coil on fixed frame.
Further, pH sensor and temperature sensor, the pH sensor and temperature sensing are provided in the autoclave body
Device is connected to the display screen that autoclave body outer wall is arranged in.
Further, the holding vessel includes tank body, and manhole, discharge port and feed inlet are provided on the tank body, described
Feed inlet is connected with compressor, and top of the tank center is provided with drain.
The beneficial effects of the present invention are:
1, usually preparing hygroscopic agent is using containing CaCO3Substance produced as raw material, the hygroscopic agent being prepared
(CaCl2) purity be 90%.Using the method for the present invention, both SO can be obtained to processing recycling is carried out in desulfurization slag2, can also obtain
By-product hygroscopic agent (CaCl2), preparing hygroscopic agent, cost is relatively low, and the purity of hygroscopic agent can reach 99%.
2, the SO that present invention recycling obtains2Purity is high can reach 98%~99%.
3, reaction kettle of the invention includes autoclave body, is provided with SO at the top of autoclave body2Outlet, SO2Outlet is connected with compressor, energy
It is enough to compress and liquefy the sulfur dioxide generated in reaction kettle, convenient for storage and transport；The autoclave body other side is provided with material inlet, former
Material import is connected with flood dragon conveyer, is convenient for transferring raw material desulfurization slag；Autoclave body bottom is provided with hygroscopic agent outlet, hygroscopic agent outlet
It is connected with deslagging pump, autoclave body can be discharged in the residue after reacting in reaction kettle, deslagging pump is also connected with filter press, Ke Yijin
Residue after reaction is separated by solid-liquid separation by one step, recycles hygroscopic agent；Autoclave body top center is provided with blender, can be with
Material inside autoclave body is stirred, reaction speed is accelerated；It is provided with infrared heating coil outside autoclave body, can quickly be improved anti-
The temperature in kettle is answered, reaction speed is accelerated；PH sensor and temperature sensor are provided in autoclave body, check convenient for staff and
Control reaction process；It is provided with that manhole is convenient for safeguarding, and top of the tank is provided centrally with drain on holding vessel, tank body can be discharged
Interior pressure guarantees the personal safety of staff.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sulfur dioxide recovery device in the embodiment of the present invention 2.
Fig. 2 is the structural schematic diagram of reaction kettle in the embodiment of the present invention 2.
Fig. 3 is the structural schematic diagram of holding vessel in the embodiment of the present invention 2.
Drawing reference numeral: 1 is reaction kettle, and 2 be screw conveyor, and 3 be deslagging pump, and 4 be filter press, and 5 be blender, and 6 be pH
Sensor, 7 be compressor, and 8 be holding vessel, and 9 be fixed frame, and 10 be infrared heating coil, and 11 be temperature sensor, and 101 be kettle
Body, 102 are added mouth for sulfur dioxide releasing agent, and 103 export for sulfur dioxide, and 104 be material inlet, and 105 export for hygroscopic agent,
106 be support, and 801 be tank body, and 802 be manhole, and 803 be discharge port, and 804 be feed inlet, and 805 be drain.
Specific embodiment
Following embodiment is technical solution in order to better illustrate the present invention, rather than limits guarantor of the invention with this
Protect range.
Embodiment 1
The technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent, comprising the following steps:
Step 1: the desulfurization slag that calcium hydroxide desulfurization obtains being placed in reaction kettle, then sulfur dioxide releasing agent is added and is reacted
It in kettle, is stirred to react, reaction temperature controls within the scope of for 40~50 DEG C, and the sulfur dioxide releasing agent is commercially available hydrochloric acid；Institute
The mass ratio of the material for stating sulfate radical in the amount and desulfurization slag of the substance of HCl in hydrochloric acid is 2:1.Specifically, described in the present embodiment
CaSO in desulfurization slag3Percentage composition be 95%.
Step 2: the SO that step 1 reaction is generated2Gas is delivered to SO2In holding vessel, after reaction, pH in reaction kettle
Value is 7, and reaction kettle autoclave body is discharged by deslagging pump in the residue of reactor bottom.Then the remnants of reaction kettle autoclave body will be discharged
Object is separated by solid-liquid separation by filter press, and recycling solid obtains hygroscopic agent CaCl2, the purity of hygroscopic agent is 99%.The present embodiment returns
Receive obtained SO2Purity is 99%.
Embodiment 2
Specifically, reaction described in embodiment 1 carries out in sulfur dioxide recovery device, the sulfur dioxide recovery device includes anti-
Kettle is answered, the reaction kettle 1 includes autoclave body 101, and the autoclave body 101 is cylindrical shape, a diameter of 1m, high 1.5m, 101 bottom of autoclave body
It is provided with support 106,101 top side of autoclave body is set side by side with sulfur dioxide releasing agent and mouth 102 and sulfur dioxide outlet is added
103, the other side is provided with material inlet 104, is provided with blender 5, specifically, this implementation at 101 top center of autoclave body
Blender 5 in example is to head into dasher, and the output end of blender 5 protrudes into autoclave body 101, is additionally provided in autoclave body 101
PH sensor 6 and temperature sensor 11, the pH sensor 6 and temperature sensor 11, which are connected to, to be arranged in 101 outer wall of autoclave body
Display screen, specifically, pH sensor 6 in the present embodiment is the JY-PH- of Guangzhou Jia Yi precision instrument Co., Ltd production
5012 type pH sensors, temperature sensor 11 are that the WZP-035F corrosion resistant type temperature of Wuxi Nanpu finite instrument company production passes
Sensor is provided with fixed frame 9 on 101 outer wall of autoclave body, and 9 bottom of fixed frame is fixedly connected with support 106, on fixed frame 9 around
Equipped with infrared heating coil 10, the sulfur dioxide outlet 103 is connected with compressor 7, specifically, the compressor in the present embodiment
The 7 ZW-4.6/5.5 type sulfur dioxide compressors produced for Xiang Tan Zhen Dan compressor Co., Ltd, compressor 7 are connected with holding vessel
8, the holding vessel 8 includes tank body 801, is provided with manhole 802, discharge port 803 and feed inlet 804 on the tank body 801, described
Feed inlet 804 is connected with compressor 7, and 801 top center of tank body is provided with drain 804, and the material inlet 104 connects
It is connected to the screw conveyor 2 of transferring raw material, 101 bottom of autoclave body is provided with hygroscopic agent outlet 105, and the hygroscopic agent outlet 105 connects
It is connected to one end of deslagging pump 3, the other end of deslagging pump is connected with filter press 4, and specifically, the deslagging pump 3 in the present embodiment is advisable
The 100UHB-UF type deslagging pump of emerging city Zeus Beng Ye Co., Ltd production, filter press 4 are the production of Henan great Zhang equipment Co., Ltd
Y15/630-30U type filter press.
SO is carried out using the reaction kettle of the present embodiment2When recycling by-product hygroscopic agent, concrete operations are as follows:
Desulfuration slag raw material is placed in screw conveyor 2 by feed inlet, desulfurization slag enters in reaction kettle 1 from material inlet 104,
Then mouth 102 is added from the sulfur dioxide releasing agent for the side that autoclave body 101 is arranged in commercially available hydrochloric acid to be added in autoclave body 101, two
Sulfur oxide releasing agent and the total volume of desulfurization slag are the 2/3 of reaction kettle volume.
Sulfur dioxide releasing agent is reacted in autoclave body 101 with desulfurization slag, blender 5 to the material in autoclave body 101 into
Reaction rate is accelerated in row stirring, while the infrared heating coil 10 being arranged outside autoclave body 101 also heats autoclave body 101, controls
For reaction temperature within the scope of 40~50 DEG C, which further speeds up reaction rate；Temperature sensor is provided in autoclave body 101
11, staff can observe real time temperature according to the display screen that 101 outer wall of autoclave body is arranged in, control infrared heating coil 10
Switch；React the SO generated2Gas rises at sulfur dioxide outlet 103, is delivered in holding vessel 8 after the compression of compressor 7
Storage.SO is generated in reaction2And SO2In transmission process, because flood dragon conveyer 2 and material inlet 104 are filled with wet desulfurization
Slag, and the hygroscopic agent outlet 105 of 101 lower part of autoclave body is in close state, therefore the SO in autoclave body 1012Gas is only capable of by two
Sulfur oxide outlet 103 enters holding vessel 8.
The residue generated bottom in autoclave body 101 is reacted, is provided with pH sensor 6 in autoclave body 101, staff passes through
The pH that the display screen of 101 outer wall of autoclave body is arranged in, which is read, determines reaction process, when pH is 7, determines that reaction terminates, first closes pressure
Contracting machine 7 and sulfur dioxide outlet 103, then open hygroscopic agent outlet 105 and deslagging pump 3, by moisture absorption under the action of deslagging pump 3
105 discharge autoclave body 101 of agent outlet, residue are delivered at filter press 4 and are separated by solid-liquid separation, the hygroscopic agent that will finally separate
SO is completed in recycling2The recycling of release and hygroscopic agent.
The embodiment of the above, only presently preferred embodiments of the present invention, not limits practical range of the invention,
Therefore all equivalent change or modifications done according to structure, feature and principle described in the invention patent range, it should be included in this hair
In bright claim.
Claims (10)
1. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent, which comprises the following steps:
Step 1: the desulfurization slag that calcium hydroxide desulfurization obtains being placed in reaction kettle, sulfur dioxide is then added into reaction kettle and releases
Agent is put, is stirred to react, reaction temperature is 40~50 DEG C, and the sulfur dioxide releasing agent is hydrochloric acid；
Step 2: the SO that step 1 reaction is generated2Gas is delivered to SO2In holding vessel, after reaction, pH value is in reaction kettle
7, reaction kettle autoclave body is discharged by deslagging pump in the residue of reactor bottom.
2. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent according to claim 1, feature exist
In, further include by step 2 discharge reaction kettle autoclave body residue be separated by solid-liquid separation by filter press, recycle solid obtain moisture absorption
Agent.
3. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent according to claim 1, feature exist
In the mass ratio of the material of sulfate radical is 2:1 in the amount and desulfurization slag of the substance of HCl in hydrochloric acid described in step 1.
4. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent according to claim 1, feature exist
In CaSO in desulfurization slag described in step 13Percentage composition be 95% or more.
5. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent according to claim 1, feature exist
In the reaction carries out in sulfur dioxide recovery device, and the sulfur dioxide recovery device includes reaction kettle (1), described anti-
Answering kettle (1) includes autoclave body (101), and autoclave body (101) top side is provided with sulfur dioxide releasing agent and mouth (102) and two are added
Sulfur oxide outlet (103), the other side are provided with material inlet (104), and the sulfur dioxide outlet (103) is connected with compressor
(7), compressor (7) is connected with holding vessel (8), and the material inlet (104) is connected with the screw conveyor (2) of transferring raw material,
Autoclave body (101) bottom is provided with hygroscopic agent outlet (105), and the hygroscopic agent outlet (105) is connected to one end of deslagging pump (3),
The other end of deslagging pump (3) is connected with filter press (4).
6. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent according to claim 5, feature exist
In the autoclave body (101) is cylindrical shape, and autoclave body (101) bottom is provided with support (106).
7. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent according to claim 5, feature exist
In being provided with blender (5) at autoclave body (101) top center, the output end of blender (5) protrudes into autoclave body (101)
It is interior.
8. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent according to claim 6, feature exist
In being provided with fixed frame (9) on autoclave body (101) outer wall, fixed frame (9) bottom is fixedly connected with support (106), institute
It states on fixed frame (9) around equipped with infrared heating coil (10).
9. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent according to claim 5, feature exist
In the autoclave body (101) is interior to be provided with pH sensor (6) and temperature sensor (11), the pH sensor (6) and temperature sensing
Device (11) is connected to setting in the display screen of autoclave body (101) outer wall.
10. the technique of calcium hydroxide desulfurization slag recycling sulfur dioxide by-product hygroscopic agent according to claim 5, feature exist
In, the holding vessel (8) includes tank body (801), be provided on the tank body (801) manhole (802), discharge port (803) and into
Material mouth (804), the feed inlet (804) are connected with compressor (7), and tank body (801) top center is provided with drain
(805).
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| CN101306304A (en) * | 2008-06-26 | 2008-11-19 | 康仁 | Desulfurizing method using soda waste liquid and calcium carbide waste residue |
| CN107335328A (en) * | 2016-04-29 | 2017-11-10 | 通用电器技术有限公司 | Instrument and method for evaporating waste water and reduction acid gas emissions |
| CN106039969A (en) * | 2016-07-21 | 2016-10-26 | 黄立维 | Sulfur dioxide absorption method and device |
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Application publication date: 20191101 |