CN113461346A - Lime slaking tank capable of removing tank bottom sediment without stopping and working method thereof - Google Patents
Lime slaking tank capable of removing tank bottom sediment without stopping and working method thereof Download PDFInfo
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- CN113461346A CN113461346A CN202110780162.1A CN202110780162A CN113461346A CN 113461346 A CN113461346 A CN 113461346A CN 202110780162 A CN202110780162 A CN 202110780162A CN 113461346 A CN113461346 A CN 113461346A
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- Prior art keywords
- tank
- pipe
- slaking
- tank body
- slaking tank
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- Pending
Links
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 33
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 33
- 239000004571 lime Substances 0.000 title claims abstract description 33
- 239000013049 sediment Substances 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000002002 slurry Substances 0.000 claims abstract description 42
- 239000012535 impurity Substances 0.000 claims abstract description 24
- 238000011001 backwashing Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 230000029087 digestion Effects 0.000 claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000008021 deposition Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 13
- 239000000292 calcium oxide Substances 0.000 description 6
- 235000012255 calcium oxide Nutrition 0.000 description 6
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/02—Lime
- C04B2/04—Slaking
- C04B2/08—Devices therefor
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/093—Cleaning containers, e.g. tanks by the force of jets or sprays
-
- 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
Abstract
A lime slaking tank capable of clearing away sediment at the bottom of the tank without stopping and a working method thereof comprise a slaking tank body and a stirrer, wherein a ring pipe is arranged at the lower part of the slaking tank body, a plurality of nozzles are arranged on the ring pipe and are sprayed in the tangential direction, liquid sprayed by the nozzles forms rotational flow at the bottom of the slaking tank, the ring pipe is connected with a circulating slurry pump, and the circulating slurry pump is connected with the upper part of the slaking tank body through a pipeline. The invention has the beneficial effects that: 1) the problem of the deposition of impurities at the bottom of the tank is effectively solved through the rotational flow at the bottom of the tank formed by the circulating slurry pump and the nozzle. 2) The problem of impurity deposit at the tank bottoms periphery has effectively been solved to the toper tank bottoms. 3) The backwashing device fully solves the problem that the emptying pipe is blocked due to impurities.
Description
Technical Field
The invention relates to the technical field of sintering flue gas desulfurization treatment, in particular to a lime slaking tank capable of removing sediment at the bottom of the tank without stopping the machine and a working method thereof.
Background
The lime slaking tank related in the technology is used in a slurry preparation system of a sintering machine SDA semi-dry desulfurization dust removal device. Slaked lime (Ca (OH) required by sintering machine SDA semi-dry desulfurization dust-removing device2) The lime (CaO) is prepared by the slaking reaction of quicklime (CaO) and water in a lime slaking tank. The digestion tank has a volume of about 10m3(phi 2 multiplied by 3.3mm), a partition board is arranged in the middle for separation, 2 slurry stirrers are arranged, quicklime (powder is quantitatively input by a weighing spiral) inlet pipe and a water inlet pipe (controlled by a pneumatic adjusting valve) are arranged at the top, an emptying pipe is arranged at the lower part, two overflow slurry outlet pipes (one of which can overflow to the vibrating screen and the other can overflow to the lime slurry tank) are arranged on the side surface of the upper part, one of which overflows to the vibrating screen for screening when the vibrating screen works normally, and the slurry can directly overflow to the lime slurry tank through the overflow pipe when the vibrating screen breaks down). An emptying pipe is arranged at the lower position and is drained to an accident water pool or directly drained to a lime slurry tank through a vibrating screen. The preparation of the slurry comprises the steps of placing quicklime and water in a digestion tank according to a certain proportion, stirring by a slurry stirrer to enable the quicklime and the water to have a digestion reaction (controlling the temperature to be 70-80 ℃) to prepare lime slurry. Because the lime contains impurities which are insoluble in water, the impurities are deposited on the bottom of the tank in a large quantity, an emptying port is blocked, and the impurities cannot be discharged from an emptying pipe. The effective volume of the digester tank is affected by the long-term accumulation of impurities. In order to discharge the impurities in the digestion tank in time, the number of times of shutdown needs to be increased, and the digestion tank is manually cleaned. This affects production and also increases labor costs.
As can be seen from the above, the conventional lime slaking tank has the following problems:
1) the quicklime raw material contains impurities, and the mass is large, so that the impurities are deposited on the bottom of the tank in a large amount.
2) The bottom of the digestion tank is flat, and the emptying port is arranged at the edge of the bottom, so that impurities are difficult to empty.
In conclusion, the problems faced by the existing lime slaking tank are that the lime raw material contains impurities, the mass is large, a large amount of lime is deposited at the bottom of the tank, so that a drain hole is blocked, and the sludge and sand at the bottom of the tank cannot be drained in time during production, and the tank needs to be shut down and manually cleaned. Thereby delaying the normal operation of the digestion system, causing the sintering flue gas desulfurization work to be incapable of normal operation and needing to be stopped for maintenance.
Disclosure of Invention
The invention aims to provide a lime slaking tank capable of removing sediment at the bottom of the tank without stopping the machine and a working method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the lime slaking tank capable of clearing away the sediment at the bottom of the tank without stopping comprises a slaking tank body and a stirrer, wherein a ring pipe is arranged at the lower part of the slaking tank body, a plurality of nozzles are arranged on the ring pipe and are sprayed in the tangential direction, a plurality of liquid sprayed by the nozzles forms rotational flow at the bottom of the slaking tank, the ring pipe is connected with a circulating slurry pump, and the circulating slurry pump is connected with the upper part of the slaking tank body through a pipeline.
The bottom of the digestion tank body is conical, the conical bottom is an emptying port, and the emptying port is connected with an emptying pipe.
The device also comprises a back washing device, and the back washing device is connected with an emptying pipe at the bottom of the digestion tank body.
The digestion tank body is connected with a feeding pipe and a water inlet pipe.
An overflow pipe is arranged at the upper part of the digestion tank body.
A method of operating a lime slaking tank for removing deposits from the bottom of the tank without shut down, the method comprising:
1) the slurry at the middle upper part of the digestion tank is introduced into the annular pipe at the lower part through the circulating slurry pump, and is sprayed into the lower part of the digestion tank at a tangent direction through the nozzle at an accelerated speed, so that the slurry at the lower part of the digestion tank forms a rotational flow, mud and sand impurities at the bottom of the digestion tank are stirred, the tank bottom is not deposited, and the emptying port is kept smooth;
2) after the mud and sand are subjected to rotational flow stirring action, the mud and sand directly rotate to the emptying pipe along the conical tank bottom to be discharged, so that impurities are effectively prevented from being deposited on the periphery of the tank bottom;
3) the large substances in the silt are easy to cause the blockage of the emptying pipe, and the emptying pipe is backwashed at any time through the backwashing device, so that the blockage of the emptying pipe is effectively prevented.
Compared with the prior art, the invention has the beneficial effects that:
1) the problem of the deposition of impurities at the bottom of the tank is effectively solved through the rotational flow at the bottom of the tank formed by the circulating slurry pump and the nozzle.
2) The problem of impurity deposit at the tank bottoms periphery has effectively been solved to the toper tank bottoms.
3) The backwashing device fully solves the problem that the emptying pipe is blocked due to impurities.
Drawings
FIG. 1 is a schematic view of a lime slaking tank of the present invention that can remove deposits from the bottom of the tank without stopping the machine.
Fig. 2 is a view from a-a in fig. 1.
In the figure: 1-a digestion tank body, 2-a feeding pipe, 3-a water inlet pipe, 4-an overflow pipe, 5-a stirrer, 6-a nozzle, 7-a circular pipe, 8-a circulating slurry pipe, 9-a circulating slurry pump, 10-a conical tank bottom, 11-a back washing device and 12-an emptying pipe.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
referring to fig. 1-2, the invention is applied to a slurry preparation system of a sintering machine SDA semi-dry desulfurization and dust removal device, can remove silt deposited at the bottom of a lime slaking tank without stopping the lime slaking tank, and can treat the blockage of an emptying pipe.
Example 1:
the lime slaking tank capable of clearing away the sediment at the bottom of the tank without stopping comprises a slaking tank body 1 and a stirrer 5, wherein a ring pipe 7 is arranged at the lower part of the slaking tank body 1, a plurality of nozzles 6 are arranged on the ring pipe 7, the nozzles 6 are sprayed in the tangential direction, a plurality of liquid sprayed by the nozzles 6 forms rotational flow at the bottom of the slaking tank, the ring pipe 7 is connected with a circulating slurry pump 9, and the circulating slurry pump 9 is connected with the upper part of the slaking tank body 1 through a pipeline.
When the lime slaking tank works, the lime raw material contains a certain proportion of silt and has large mass, so that the lime raw material is deposited on the bottom of the tank in a large quantity, an emptying pipe is blocked, impurities at the bottom cannot be emptied when the slaking tank works, the effective volume of the slaking tank is gradually reduced, and the slaking tank needs to be stopped for treatment. After a slurry circulating system is additionally arranged, when slurry exceeds 200-300mm of a joint of a circulating slurry pipe 8 and a digestion tank body 1, a circulating slurry pump 9 is started, slurry on the top of the digestion tank is sprayed into the digestion tank body 1 at a high speed in a tangential direction through the circulating slurry pipe 8, the circulating slurry pump 9, a circular pipe 7 and a nozzle 6 in sequence, and the slurry on the lower part of the digestion tank forms rotational flow. After the slurry forms the rotational flow, the silt deposited at the bottom of the digestion tank body 1 can be stirred along with the rotational flow, the tank bottom deposition cannot occur, the emptying port is kept smooth, and the bottom impurities can be discharged through the emptying port at any time when the digestion tank works.
Example 2:
the lime slaking tank capable of clearing away the sediment at the bottom of the tank without stopping comprises a slaking tank body 1 and a stirrer 5, wherein a ring pipe 7 is arranged at the lower part of the slaking tank body 1, a plurality of nozzles 6 are arranged on the ring pipe 7, the nozzles 6 are sprayed in the tangential direction, a plurality of liquid sprayed by the nozzles 6 forms rotational flow at the bottom of the slaking tank, the ring pipe 7 is connected with a circulating slurry pump 9, and the circulating slurry pump 9 is connected with the upper part of the slaking tank body 1 through a pipeline. The bottom of the digestion tank body 1 is conical, the conical bottom is an emptying port, and the emptying port is connected with an emptying pipe 12.
Because the bottom of the digestion tank body 1 is changed into the heap-shaped tank bottom 10, after the rotational flow is formed, the mud and sand are subjected to rotational flow stirring action, and then the heavy impurities flow to the middle part of the tank bottom along the conical wall of the conical tank bottom 10 and are discharged along the emptying pipe 12. Therefore, the problems that impurities are deposited on the periphery of the tank bottom and are difficult to clean are solved.
Example 3:
the lime slaking tank capable of clearing away the sediment at the bottom of the tank without stopping comprises a slaking tank body 1 and a stirrer 5, wherein a ring pipe 7 is arranged at the lower part of the slaking tank body 1, a plurality of nozzles 6 are arranged on the ring pipe 7, the nozzles 6 are sprayed in the tangential direction, a plurality of liquid sprayed by the nozzles 6 forms rotational flow at the bottom of the slaking tank, the ring pipe 7 is connected with a circulating slurry pump 9, and the circulating slurry pump 9 is connected with the upper part of the slaking tank body 1 through a pipeline. The device also comprises a back washing device 11, wherein the back washing device 11 is connected with an emptying pipe 12 at the bottom of the digestion tank body 1.
The emptying pipe 12 is easily blocked by large substances in the silt, the backwashing device 11 is arranged at the upper part of the emptying pipe 12, and the backwashing device 11 is used for backwashing the emptying pipe 12 at any time to flush impurities blocked in the emptying pipe 12 and discharge the impurities along with the emptying pipe 12, so that the emptying pipe 12 is effectively prevented from being blocked.
The above embodiments can be operated separately or simultaneously in different situations, so as to increase the efficiency of treating the blockage of the digestion tank.
The operation is carried out when the digestion tank works, the shutdown treatment is not needed, and the working efficiency of the digestion tank is greatly improved.
Claims (6)
1. The lime slaking tank capable of clearing away the sediment at the bottom of the tank without stopping comprises a slaking tank body and a stirrer and is characterized in that a ring pipe is arranged at the lower part of the slaking tank body, a plurality of nozzles are arranged on the ring pipe and are sprayed in the tangential direction, liquid sprayed by the nozzles forms rotational flow at the bottom of the slaking tank, the ring pipe is connected with a circulating slurry pump, and the circulating slurry pump is connected with the upper part of the slaking tank body through a pipeline.
2. The lime slaking tank of claim 1, wherein the bottom of the slaking tank body is tapered, the tapered bottom being a drain, the drain being connected to a drain pipe.
3. A lime slaking tank with non-stop tank bottom deposit eliminating function as claimed in claim 1 or 2, further comprising a back flushing device, said back flushing device being connected to the emptying pipe at the bottom of the slaking tank body.
4. A lime slaking tank with non-stop tank bottom deposit removal function as claimed in claim 1, characterized in that a feed pipe and a water inlet pipe are connected to the slaking tank body.
5. A lime slaking tank having a tank bottom settled according to claim 1, characterised in that an overflow pipe is arranged in the upper part of the slaking tank body.
6. A method of operating a lime slaking tank with non-stop removal of deposits from the tank bottom according to claims 1-5, characterized in that the method comprises:
1) the slurry at the middle upper part of the digestion tank is introduced into the annular pipe at the lower part through the circulating slurry pump, and is sprayed into the lower part of the digestion tank at a tangent direction through the nozzle at an accelerated speed, so that the slurry at the lower part of the digestion tank forms a rotational flow, mud and sand impurities at the bottom of the digestion tank are stirred, the tank bottom is not deposited, and the emptying port is kept smooth;
2) after the mud and sand are subjected to rotational flow stirring action, directly rotating the flow along the bottom of the conical tank to an emptying pipe for discharging;
3) the large substances in the silt easily cause the blockage of the emptying pipe, and the emptying pipe is backwashed through a backwashing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110780162.1A CN113461346A (en) | 2021-07-09 | 2021-07-09 | Lime slaking tank capable of removing tank bottom sediment without stopping and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110780162.1A CN113461346A (en) | 2021-07-09 | 2021-07-09 | Lime slaking tank capable of removing tank bottom sediment without stopping and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113461346A true CN113461346A (en) | 2021-10-01 |
Family
ID=77879490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110780162.1A Pending CN113461346A (en) | 2021-07-09 | 2021-07-09 | Lime slaking tank capable of removing tank bottom sediment without stopping and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113461346A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116121472A (en) * | 2023-04-14 | 2023-05-16 | 常州中源工程技术有限公司 | Waste heat recovery system for slag flushing water of blast furnace |
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| CN202369507U (en) * | 2011-11-03 | 2012-08-08 | 鞍钢集团工程技术有限公司 | Sintering flue gas desulfurization digestion tank |
| CN204134458U (en) * | 2014-09-10 | 2015-02-04 | 鞍钢集团工程技术有限公司 | A kind of emergency pool that doublely can do loop slurry system blending tank and recycle slurry flow container |
| CN205420187U (en) * | 2015-12-23 | 2016-08-03 | 北京利德衡环保工程有限公司 | A two jars of two -stage digestion devices for flue gas desulfurization |
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-
2021
- 2021-07-09 CN CN202110780162.1A patent/CN113461346A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116121472A (en) * | 2023-04-14 | 2023-05-16 | 常州中源工程技术有限公司 | Waste heat recovery system for slag flushing water of blast furnace |
| CN116121472B (en) * | 2023-04-14 | 2023-09-19 | 常州中源工程技术有限公司 | Waste heat recovery system for slag flushing water of blast furnace |
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Effective date of registration: 20230727 Address after: 114000 Anshan Anshan Iron and steel plant, Liaoning Province (ironmaking small machine repair) Applicant after: Angang industrial group (Anshan) equipment operation and maintenance Co.,Ltd. Address before: 114000 No.62 Garden Avenue, Lishan District, Anshan City, Liaoning Province Applicant before: Angang Metal Construction Co.,Ltd. |