CN111744353A - Lime mud filtering device of kiln desulfurizing tower and desulfurizing process using same - Google Patents
Lime mud filtering device of kiln desulfurizing tower and desulfurizing process using same Download PDFInfo
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- CN111744353A CN111744353A CN202010678410.7A CN202010678410A CN111744353A CN 111744353 A CN111744353 A CN 111744353A CN 202010678410 A CN202010678410 A CN 202010678410A CN 111744353 A CN111744353 A CN 111744353A
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- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 75
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 75
- 239000004571 lime Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000001914 filtration Methods 0.000 title claims abstract description 23
- 230000003009 desulfurizing effect Effects 0.000 title claims abstract description 21
- 230000008569 process Effects 0.000 title claims abstract description 18
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 60
- 239000007787 solid Substances 0.000 claims abstract description 51
- 239000012535 impurity Substances 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 210000000078 claw Anatomy 0.000 claims abstract description 14
- 239000002912 waste gas Substances 0.000 claims abstract description 14
- 230000008021 deposition Effects 0.000 claims description 81
- 238000006477 desulfuration reaction Methods 0.000 claims description 33
- 230000023556 desulfurization Effects 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 13
- 238000001556 precipitation Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 239000002351 wastewater Substances 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 229910001385 heavy metal Inorganic materials 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 13
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000010865 sewage Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract 1
- 238000000151 deposition Methods 0.000 description 87
- 239000000243 solution Substances 0.000 description 26
- 238000001514 detection method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 238000004062 sedimentation Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- 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
-
- 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
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a lime mud filtering device of a kiln desulfurizing tower and a desulfurizing process using the device, and relates to the field of environment-friendly treatment of sewage and waste gas. This scheme includes lime wash circulation pond, circulation drawing liquid pump and a plurality of deposit case, and the upper portion of deposit case is provided with the overflow mouth, and the bottom of deposit case is provided with fork truck fork claw connecting portion, and the deposit case is provided with the vibration subassembly that drives the vibration of deposit case outward. The lime mud filter device of the kiln desulfurizing tower and the desulfurizing process using the filter device are provided, the lime mud which is solid impurities of lime water solution is conveniently and quickly precipitated and filtered, the filtering efficiency is high, the labor intensity of post workers is reduced, the device is simple in structure and low in manufacturing cost, and has better social benefits and environmental benefits, the treatment efficiency of the filtered lime water on the kiln smoke is improved, the material waste can be reduced, the utilization efficiency of resources is improved, and better economic benefits and environmental benefits are achieved.
Description
Technical Field
The invention relates to the field of environment-friendly treatment of sewage and waste gas, in particular to a lime mud filtering device of a kiln desulfurizing tower and a desulfurizing process using the device.
Background
The economy of China develops at a high speed, and the problem of industrial pollution caused by industrial development is more and more emphasized.
In the aspect of ceramic factory sewage and waste gas treatment, the method is in the stage of innovation and promotion.
At present, the known kiln desulfurization tower lime gypsum method, for example, chinese patent application No. 201610119638.6, discloses a method and a system for treating flue gas desulfurization wastewater by limestone/lime-gypsum method, which comprises adding lime, sodium sulfate, heavy metal precipitator, flocculant and coagulant into the desulfurization wastewater to be treated, and finally desulfurizing the wastewater through the procedures of precipitation, effluent neutralization and the like.
In addition, another desulfurization mode is adopted, namely lime water is sprayed into the acidic waste gas in the kiln desulfurization tower to react, so that the effect of treating the kiln waste gas is achieved, and the lime water needs to be filtered before spraying.
In order to reduce the blockage of the pipelines and the spray gun by the lime mud, the lime water is filtered.
The traditional filtering method adopts a squeezer mode for treatment, and has a plurality of defects:
firstly, the whole set of squeezer equipment is bulky, is matched with an environment-friendly tank for use, contains a plunger pump and a mud pressing filter plate, and is used for pressurization, a conveying belt and the like, so that certain waste is caused;
and secondly, the workload of operators is increased, so that the manufacturing cost of enterprises is increased, and the enterprises are subjected to capital burden.
Therefore, there is a need for a lime mud filtration solution suitable for use in kiln desulfurization towers.
Disclosure of Invention
In order to solve the technical problems, a first object of the present invention is to provide a lime mud filter device for a kiln desulfurization tower, which includes a lime water circulation tank, a circulation liquid pump and a deposition tank, wherein the deposition tank is used for depositing lime mud, which is a solid impurity in a lime water solution, the deposited solid lime mud can be transferred away by a forklift and used as a ceramic raw material, and the liquid of the filtered lime water solution is used as a raw material for desulfurization treatment, so that the lime water can be fully utilized, the utilization rate of resources is improved, and the filter device has a simple structure and is convenient to filter.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a kiln desulfurizing tower lime mud filter equipment, includes lime wash circulation pond, still includes circulation drawing liquid pump and a plurality of deposit case, the circulation drawing liquid pump passes through the transfer line and connects respectively lime wash circulation pond the deposit case, the upper portion of deposit case is provided with the overflow mouth, the bottom of deposit case is provided with fork truck fork claw connecting portion, the deposit case is provided with the vibration subassembly outward, the vibration subassembly drives the deposit case vibration.
Through the arrangement, the circulating liquid pumping pipe is respectively connected with the lime water circulating pool and the depositing box through liquid conveying pipes, when the water solution in the lime water circulating pool is filtered, the lime water solution is pumped into the depositing box from the lime water circulating pool through the circulating liquid pumping pipe, the upper part of the depositing box is provided with an overflow port, solid impurity lime mud in the lime water solution is separated from liquid under the action of self weight, the separated solid impurity lime mud is precipitated in the depositing box, the flowing liquid is discharged out of the depositing box through the overflow port, the lime water in the lime water circulating pool is effectively filtered through multiple circulation, the solid impurity lime mud deposited in the depositing box can be transported away through a forklift and used as a raw material for ceramic production, the liquid part of the filtered lime water solution can be conveyed into a kiln desulfurizing tower and used as an alkaline treating agent, and the filtering device can filter the lime water solution, the structure is simple, the lime water solution can be fully utilized, the waste of resources is reduced, and the energy conservation and environmental protection are realized;
the vibration assembly is arranged, and the vibration assembly drives the deposition box to vibrate, so that deposited solid impurity lime mud in the deposition box can be vibrated and compacted, solid and liquid in the deposition box are further effectively separated, and the filtering effect of the lime water solution is improved.
Preferably, at least two deposition boxes are arranged, the deposition boxes are arranged adjacently, the heights of the upper ends of the deposition boxes are gradually lowered, and the overflow port of the deposition box with the higher height of the upper end of each two adjacent deposition boxes is positioned above the top of the other deposition box.
Through setting up like this, the setting of deposit box is two at least, the upper end height that the adjacent setting of deposit box and deposit box descends gradually, thereby when circulating filtration lime aqueous solution, can carry out two-stage deposit at least to lime aqueous solution in a circulation in-process, improve filterable efficiency, and, when circulating the drawing liquid pump with lime aqueous solution pump to one of them deposit box, rivers are more urgent, can take deposited solid impurity up, make deposited solid impurity flow out the deposit box along with the rivers, influence filterable effect and efficiency, and set up the deposit box of two-stage at least, can cushion rivers, make the solid impurity lime sediment of taking out in the liquid that flows from last one-level deposit box less, thereby improve filterable effect.
Preferably, the overflow port is connected with an overflow pipe, and the liquid outlet end of the overflow pipe is arranged towards the bottom of the deposition tank.
Through setting up like this, the overflow pipe extension is followed the route that the liquid that the overflow mouth flows, reduces the pollution of the liquid that the overflow mouth flows to the settling tank outer wall, can also make the settling tank overflow exhaust liquid flow to next stage settling tank or flow back to in the lime wash circulation pond as far as possible, reduces the loss of lime water solution.
Preferably, the middle part of the side wall of the sedimentation tank is provided with a water outlet, and the water outlet is provided with a drain valve.
Through setting up like this, collect solid impurity lime mud after, through the outlet, be convenient for drain away the water of solid impurity top, leave solid impurity lime mud, use as ceramic raw materials.
Preferably, the fork claw connecting part of the forklift comprises at least two connecting blocks, the connecting blocks are connected with the bottom surface of the deposition box, and the connecting blocks are provided with inserting grooves for inserting fork claws of the forklift.
Through setting up like this, set up the connecting block in the bottom of deposit box to set up the plug-in groove concave on the connecting block, fork claw of fork truck can peg graft in the plug-in groove, thereby can use fork truck to transport the deposit box, the convenience is to the removal and the change of deposit box.
Preferably, the vibration assembly comprises a vibrator fixedly arranged on the outer wall of the deposition box.
Through setting up like this, the vibration subassembly adopts the vibrator, with vibrator direct mount on the outer wall of deposit box, directly drives the vibration of deposit box through the vibration of vibrator to make the solid impurity lime mud vibration compaction of deposit in the deposit box, further make the effective separation of solid-liquid in the deposit box, improve filterable effect.
Preferably, the vibrator is fixed to a mounting bracket, and an upper end of the mounting bracket is provided with a hook-shaped coupling portion to be hooked with an upper end of the deposition chamber.
Through setting up like this, can separate vibrator and deposit case, the vibrator is applicable in different deposit cases, improves the rate of utilization of vibrator, reduces the wasting of resources.
Preferably, a mounting frame is arranged on the lime water circulating pool, a placing groove for placing the depositing box is formed in the mounting frame, the vibration assembly comprises a vibrator, and the vibrator is fixedly arranged on the mounting frame and is abutted against the outer wall of the depositing box.
Through setting up like this, with vibration subassembly and deposit box separation to the reduction is shifting the damage that deposit box in-process probably caused the vibrator, and is favorable to reducing the weight of deposit box in addition, places deposit box back in the standing groove, makes the outer wall butt of vibrator and deposit box, thereby the vibrator starts work, can drive the vibration of deposit box, carries out the process of normal vibration compaction solid impurity lime sediment.
Based on the same inventive concept, the second objective of the present invention is to provide a desulfurization process of a kiln desulfurization tower, which uses a desulfurization tower and the lime mud filtering device of the kiln desulfurization tower, and comprises the following steps:
s1: adding lime powder and water into a lime water circulating pool according to a formula to prepare lime water solution;
s2: starting a circulating liquid pump, pumping the lime water solution into a deposition box from a lime water circulating pool, precipitating solid impurities in the lime water solution in the deposition box, and refluxing liquid in the lime water solution into the lime water circulating pool from an overflow port;
in the solid impurity precipitation process, vibrating the component for 2-3 minutes every hour;
s3: spraying the filtered lime water solution into a desulfurizing tower to react with acidic waste gas in a kiln, adjusting the pH of the flue gas to 9.0-9.5, and enabling heavy metal ions Cu to be in a state of being dissolved in the acidic waste gas2+、Ni2+、Cr3+Separating from the waste water in the form of hydroxide precipitate;
s4: and after the height of the solid impurities accumulated reaches the preset height, the deposition box is transported to the ceramic raw material bin by a forklift, and the solid impurities are stored for later use.
By the arrangement, the lime water is filtered by the filtering device, the traditional mud press squeezing filtering mode is replaced, the lime water is filtered and then sprayed into the kiln desulfurization tower to react in acid waste gas, the aim of treating the kiln waste gas is achieved, and the kiln desulfurization tower can operate at lower cost and high efficiency;
in the filtering process, the vibration assembly is started for 2-3 minutes per hour, so that the solid impurity lime mud is compacted and agglomerated, and water in the settling tank is extruded upwards and then discharged outwards;
when the lime mud to be solid impurity is gathered to reach a preset height, the deposition box is transported to a ceramic raw material bin by a forklift, and the lime mud is stored for standby;
the lime milk after precipitation and filtration is sprayed into acidic waste gas in a kiln through a desulfurizing tower device to react, the lime milk can adjust the flue gas to be alkaline, the pH value is adjusted to 9.0-9.5, and meanwhile, heavy metal ions Cu are enabled to be contained2+、Ni2+、Cr3+Separating the waste water in the form of hydroxide precipitation to ensure that the kiln waste gas reaches the industrial sewage waste gas treatment standard;
after a certain amount of solid impurity lime mud taken out from the deposition box is stored, the solid impurity lime mud is added into a ceramic body formula as one of ceramic raw materials and is recycled, so that the workload of treating the solid impurity lime mud can be reduced, and higher economic benefit, social benefit and environmental benefit can be generated.
Preferably, when the height of the solid impurities accumulated reaches half of the height of the deposition box, the deposition box is transferred away by a forklift and replaced by a new deposition box.
Through setting up like this, when the height that waits that solid impurity gathers reaches the height that waits that solid impurity gathers, transfer away the deposit case with fork truck to replace new deposit case, reduce because the solid impurity that deposits in the deposit case gathers too much and lead to the condition emergence of solid impurity take out the difficulty.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the lime mud filter device for the kiln desulfurizing tower is convenient and fast to precipitate and filter the solid impurity lime mud of the lime water solution, is high in filtering efficiency, reduces labor intensity of post workers, and is simple in structure, low in manufacturing cost and good in social benefit and environmental benefit.
2. The desulfurization process of the kiln desulfurization tower is provided, and an improved lime slag filtering device is used for conveniently and quickly precipitating and filtering solid impurity lime slag in a lime water solution, so that the treatment efficiency of the filtered lime water on kiln flue gas is improved, and the working efficiency of the flue gas treatment process is improved; solid impurity lime mud detained in the settling tank after filtering can be used as the raw materials of ceramic manufacture to can carry out make full use of lime wash solution, reduce the material waste, improve the utilization efficiency of resource, have better economic benefits and environmental benefit.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a lime mud filter device of a kiln desulfurizing tower in example 1 of the present invention;
FIG. 2 is a right side view of the settling tank with the overflow pipe removed in example 1 of the present invention;
FIG. 3 is a left side view of a deposition chamber in accordance with embodiment 1 of the present invention;
fig. 4 is a schematic view of the overall structure of a lime mud filter device of a kiln desulfurizing tower in embodiment 2 of the invention.
Wherein, the technical characteristics that each reference numeral refers to are as follows:
1. a lime water circulation tank; 101. a bearing block; 2. a circulating liquid pump; 3. a deposition chamber; 301. a side plate; 3011. an overflow port; 30111. an overflow pipe; 3012. a drain valve; 30121. a drain pipe; 302. a base plate; 3021. a forklift jaw connection part; 30211. connecting blocks; 302111, a plug groove; 4. a transfusion tube; 5. a vibrating assembly; 501. a vibrator; 5011. mounting a bracket; 50111. a hook-shaped connecting portion; 6. a mounting frame; 601. an in-place detection sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following embodiments.
Example 1
Referring to fig. 1 and 2, the embodiment discloses a lime mud filter device for a kiln desulfurization tower, which comprises a lime water circulation pool 1, a circulation liquid pump 2 and a plurality of sedimentation tanks 3, wherein liquid inlet ends and liquid outlet ends of the circulation liquid pump 2 are respectively communicated with the lime water circulation pool 1 and the sedimentation tanks 3 through liquid conveying pipes (4), overflow ports 3011 are formed in the upper parts of the sedimentation tanks 3, fork claw connecting parts 3021 of a forklift are formed in the bottoms of the sedimentation tanks 3, and the fork claw connecting parts 3021 of the forklift are used for being connected with fork claws of the forklift, so that the sedimentation tanks 3 can be conveniently transported; in this embodiment, the circulating pump 2 is a pump of 15 KW.
Referring to fig. 1 and 3, the deposition box 3 is further provided with a vibration assembly 5, and the vibration assembly 5 is attached to the outer wall of the deposition box 3 to drive the deposition box 3 to vibrate.
Referring to fig. 1, 2 and 3, the deposition chambers 3 are arranged at least two, the deposition chambers 3 are arranged adjacently, the heights of the upper ends of the deposition chambers are gradually lowered, and the overflow port 3011 of one deposition chamber 3 with the higher height of the upper end is positioned above the top of the other deposition chamber 3 in the two adjacent deposition chambers 3, so that the liquid overflowing from the previous deposition chamber 3 can flow to the next deposition chamber 3 for re-deposition.
In this embodiment, two deposition boxes 3 are provided, wherein one deposition box 3 is a cube iron box with a side length of 1200mm and a thickness of 5mm, the other deposition box 3 is an iron box with a length of 1200mm, a width of 1200mm, a height of 1000mm and a thickness of 5mm, the deposition box 3 comprises four side plates 301 and a bottom plate 302, the upper portion of the deposition box 3 is normally open, water enters from the upper portion, an overflow port 3011 is arranged at the middle position of the upper end of one of the side plates 301, in this embodiment, the overflow port 3011 is an oval opening with a long axis of 400mm and a short axis of 200 mm.
Referring to fig. 1, an overflow pipe 30111 is connected to the overflow port 3011, a liquid outlet end of the overflow pipe 30111 is disposed toward the bottom of the deposition chamber 3, and a distance is kept between the liquid outlet and the outer wall of the deposition chamber 3.
Referring to fig. 3, a drainage port (not shown) is provided at a central portion of a sidewall of the settling tank 3, a drainage valve 3012 is provided at the drainage port, a drainage pipe 30121 is connected to the drainage port, and the drainage valve 3012 is provided on the drainage pipe 30121.
Referring to fig. 1, the fork claw connecting portion 3021 of the forklift includes at least two connecting blocks 30211, the connecting blocks 30211 are all connected to the bottom surface of the deposition chamber 3, the connecting blocks 30211 are provided with insertion grooves 302111 for inserting fork claws of the forklift, and in this embodiment, the insertion grooves 302111 have a length × width: 200mm is multiplied by 70mm, and the fork claws of the forklift are inserted, so that the deposition box 3 can be conveniently lifted and transported by the forklift.
Referring to fig. 1, a support block 101 is further arranged on the lime water circulation tank 1, and the support block 101 is abutted against the bottom of the deposition tank 3, so that the connection block 30211 is suspended and spaced from the top surface of the lime water circulation tank 1, and the deposition tank 3 can be lifted and carried by a forklift conveniently.
Referring to fig. 1 and 3, the vibration assembly 5 includes a vibrator 501, and in this embodiment, the vibrator 501 is fixedly disposed on an outer wall of the deposition chamber 3.
Specifically, referring to fig. 3, the vibrator 501 is fixedly mounted on a mounting bracket 5011, and the upper end of the mounting bracket 5011 is provided with a hook connection portion 50111, and is hooked with the upper end of the deposition chamber 3 through the hook connection portion 50111, thereby fixing the vibrator 501 outside the deposition chamber 3.
By adopting the mode, the vibrator 501 and the deposition boxes 3 can be conveniently detached and separated, the vibrator 501 can be switched and used in different deposition boxes 3, the utilization rate of the vibrator 501 is improved, and the resource waste is reduced.
Example 2
Referring to fig. 4, the present embodiment discloses another lime mud filtering device for a kiln desulfurization tower, which is different from embodiment 1 in that:
be provided with mounting bracket 6 on lime wash circulation pond 1, be provided with the standing groove (in the figure) that supplies deposit box 3 to place on mounting bracket 6, vibration subassembly 5 includes vibrator 501, and vibrator 501 is fixed to be set up on mounting bracket 6, and vibrator 501 extends to in the standing groove and vibrator 501 and the outer wall butt of deposit box 3.
The mounting frame 6 may further be provided with an in-place detection sensor 601 and a controller (not shown in the figure), the in-place detection sensor 601, the circulating liquid pump 2 and the vibrator 501 are all electrically connected to the controller, the in-place detection sensor 601 may detect whether the deposition tank 3 is placed in place, that is, whether the outer wall of the deposition tank 3 abuts against the vibrator 501, the in-place detection sensor 601 may be one of a point contact switch, a photoelectric switch or a travel switch, when the deposition tank 3 is placed in place, the in-place detection sensor 601 outputs a trigger signal to the controller, and the controller may execute a related action according to the feedback signal, for example, the circulating liquid pump 2 is turned on, and the vibrator 501 is started.
And an alarm device (not shown in the figure) can be arranged and is a sound and/or light alarm, the alarm is connected with the controller, when the in-place detection sensor 601 does not detect that the deposition box 3 is in place, the controller controls the alarm device to be started to alarm and remind, and the alarm device is closed by the controller until the deposition box 3 is in place.
Example 3
The embodiment discloses a desulfurization process of a kiln desulfurization tower, which applies the desulfurization tower and a lime mud filter device of the kiln desulfurization tower in the embodiment 1 or 2, and comprises the following steps:
s1: adding lime powder and water into a lime water circulating pool 1 according to a formula to prepare lime water solution; the proportion adopts the matching ratio of lime water commonly used in the prior art, for example, the weight ratio of the quicklime to the water is 1: 1;
s2: starting a circulating liquid pump 2, pumping the lime water solution into a deposition tank 3 from a lime water circulating pool 1, precipitating solid impurities in the lime water solution in the deposition tank 3, and refluxing liquid in the lime water solution into the lime water circulating pool 1 from an overflow port 3011;
in the solid impurity precipitation process, starting the vibration component 5 to work for 2-3 minutes every hour;
s3: spraying the filtered lime water solution into a desulfurizing tower, reacting with acidic waste gas in a kiln, adjusting the pH of the flue gas to 9.0-9.5, and separating heavy metal ions Cu2+, Ni2+ and Cr3+ from the wastewater in the form of hydroxide precipitation;
s4: after the height of the solid impurities accumulated reaches the preset height, the deposition box 3 is transported to a ceramic raw material bin by a forklift, and the solid impurities are stored for later use.
In S4, when the height of the solid impurities accumulated reaches the position of the drain opening and the height of the settling tank 3 is half of the height of the settling tank 3, the settling tank 3 is transferred by a forklift and replaced with a new settling tank 3.
Referring to fig. 1, a circulating liquid pump 2 is started, a filtering device circularly works according to the flow direction of an arrow in the drawing, lime water solution in a lime water circulating pool 1 is conveyed to a deposition tank 3 through a liquid conveying pipe (4), the precipitation of solid impurity lime mud is carried out in a first deposition tank 3 by utilizing the principle that lime mud is easy to precipitate and separate in water, a vibrator 5012 of the first deposition tank 3 is started every hour in the circulating work process, so that the solid impurity lime mud in the deposition tank 3 is compacted and agglomerated, and the water in the deposition tank 3 is extruded upwards and discharged from an overflow port 3011;
the liquid overflowing from the first deposition tank 3 flows into the second deposition tank 3 from the upper part of the second deposition tank 3 to be deposited for the second time, and solid impurity lime mud can be remained in the liquid discharged from the first deposition tank 3, so that the solid impurities can be deposited for the second time, the flow rate of the liquid discharged from the overflow port 3011 of the second deposition tank 3 is reduced, the reduction of the water flow to bring the deposited solid impurities out of the deposition tank 3 is facilitated, and the effect of deposition and filtration is improved.
When the solid impurity lime mud is full of the drain holes, the two deposition boxes 3 are respectively transported to the ceramic raw material bin by a forklift, and the lime mud is stored for standby.
In the transferred deposition box 3, a drain valve 3012 is opened, and water above the solid impurity lime mud is drained out of the deposition box 3 through a drain port, so that the solid impurity is retained in the deposition box 3 and is used as a raw material of ceramics.
After a certain amount of lime mud is taken out from the deposition box 3, the lime mud is added into a ceramic body formula as one of ceramic raw materials and recycled, so that the workload of lime mud treatment can be reduced, and higher economic, social and environmental benefits can be generated.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (10)
1. The utility model provides a kiln desulfurizing tower lime mud filter equipment, includes lime wash circulation pond (1), its characterized in that still includes circulation drawing liquid pump 2 and a plurality of deposit case (3), circulation drawing liquid pump (2) are connected respectively through transfer line (4) lime wash circulation pond (1) deposit case (3), the upper portion of deposit case (3) is provided with overflow mouth (3011), the bottom of deposit case (3) is provided with fork truck fork claw connecting portion (3021), be provided with vibration subassembly (5) outward in deposit case (3), vibration subassembly (5) drive deposit case (3) vibration.
2. The lime mud filter unit of the kiln desulfurization tower according to claim 1, wherein the number of the settling tanks (3) is at least two, the settling tanks (3) are adjacently arranged, the heights of the upper ends of the settling tanks (3) are gradually lowered, and the overflow port (3011) of the settling tank (3) with the higher height is positioned above the top of the other settling tank (3) in the two adjacent settling tanks (3).
3. The lime mud filter unit of the kiln desulfurization tower according to claim 1 or 2, wherein an overflow pipe (30111) is connected to the overflow port (3011), and the liquid outlet end of the overflow pipe (30111) is arranged towards the bottom of the deposition tank (3).
4. The lime mud filter unit of the kiln desulfurization tower according to claim 3, wherein a water discharge port is arranged in the middle of the side wall of the settling tank (3), and a water discharge valve (3012) is arranged at the water discharge port.
5. The lime mud filter unit of kiln desulfurization tower according to claim 1, 2 or 4, characterized in that the forklift claw connection (3021) comprises at least two connection blocks (30211), each of the connection blocks (30211) is connected with the bottom surface of the settling tank (3), and the connection blocks (30211) are opened with insertion grooves (302111) for insertion of forklift claws.
6. The kiln desulfurization tower lime mud filtering device according to claim 1, 2 or 4, characterized in that the vibration assembly (5) comprises a vibrator (501), and the vibrator (501) is fixedly arranged on the outer wall of the settling tank (3).
7. The lime mud filter arrangement of a kiln desulfurization tower according to claim 6, characterized in that the vibrator (501) is fixed to a mounting bracket (5011), the upper end of the mounting bracket (5011) being provided with a hook-shaped connection (50111) which hooks into the upper end of the settling tank (3).
8. The lime mud filter unit of claim 1, 2 or 4, wherein a mounting frame (6) is arranged on the lime water circulating tank (1), a placing groove for placing the settling tank (3) is arranged on the mounting frame 6, the vibration assembly (5) comprises a vibrator 501, and the vibrator 501 is fixedly arranged on the mounting frame 6 and is abutted against the outer wall of the settling tank (3).
9. A desulfurization process of a kiln desulfurization tower, which is characterized in that the desulfurization tower and the lime mud filter device of any one of claims 1 to 8 are used, and the desulfurization process comprises the following steps:
s1: lime powder and water are added into a lime water circulating pool (1) according to a formula to prepare lime water solution;
s2: starting a circulating liquid pump (2), pumping the lime water solution into a deposition tank (3) from a lime water circulating pool (1), precipitating solid impurities in the lime water solution in the deposition tank (3), and refluxing liquid in the lime water solution into the lime water circulating pool (1) from an overflow port (3011);
in the solid impurity precipitation process, the vibration component (5) works for 2-3 minutes every hour;
s3: spraying the filtered lime water solution into a desulfurizing tower, reacting with acidic waste gas in a kiln, adjusting the pH of the flue gas to 9.0-9.5, and separating heavy metal ions Cu2+, Ni2+ and Cr3+ from the wastewater in the form of hydroxide precipitation;
s4: after the height of the solid impurities accumulated reaches the preset height, the deposition box (3) is transported to the ceramic raw material bin by a forklift, and the solid impurities are stored for later use.
10. A desulfurization process in accordance with claim 9, characterized in that when the height of the solid impurities accumulated reaches half the height of the settling tank (3), the settling tank (3) is transferred away by a forklift and replaced with a new settling tank (3).
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| CN202010678410.7A CN111744353A (en) | 2020-07-15 | 2020-07-15 | Lime mud filtering device of kiln desulfurizing tower and desulfurizing process using same |
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| CN202010678410.7A CN111744353A (en) | 2020-07-15 | 2020-07-15 | Lime mud filtering device of kiln desulfurizing tower and desulfurizing process using same |
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