CN117003261B - Sintering tail gas salt capturing process - Google Patents
Sintering tail gas salt capturing process Download PDFInfo
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- CN117003261B CN117003261B CN202310954032.4A CN202310954032A CN117003261B CN 117003261 B CN117003261 B CN 117003261B CN 202310954032 A CN202310954032 A CN 202310954032A CN 117003261 B CN117003261 B CN 117003261B
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- 150000003839 salts Chemical class 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005245 sintering Methods 0.000 title claims abstract description 17
- 238000005070 sampling Methods 0.000 claims abstract description 96
- 239000002245 particle Substances 0.000 claims abstract description 78
- 239000007787 solid Substances 0.000 claims abstract description 77
- 239000002699 waste material Substances 0.000 claims abstract description 54
- 239000011550 stock solution Substances 0.000 claims abstract description 50
- 238000007689 inspection Methods 0.000 claims abstract description 48
- 238000001914 filtration Methods 0.000 claims abstract description 31
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000003546 flue gas Substances 0.000 claims abstract description 29
- 239000007789 gas Substances 0.000 claims abstract description 26
- 230000000694 effects Effects 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000002485 combustion reaction Methods 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 238000001354 calcination Methods 0.000 claims abstract description 9
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 9
- 239000000779 smoke Substances 0.000 claims abstract description 6
- 238000003763 carbonization Methods 0.000 claims abstract description 4
- 238000010000 carbonizing Methods 0.000 claims abstract description 4
- 230000001590 oxidative effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 239000004745 nonwoven fabric Substances 0.000 claims description 23
- 238000005303 weighing Methods 0.000 claims description 23
- 238000012216 screening Methods 0.000 claims description 19
- 238000004140 cleaning Methods 0.000 claims description 16
- 238000004804 winding Methods 0.000 claims description 14
- 238000002425 crystallisation Methods 0.000 claims description 13
- 230000008025 crystallization Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 9
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 6
- 235000011152 sodium sulphate Nutrition 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims description 3
- 230000023556 desulfurization Effects 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims description 3
- 230000000171 quenching effect Effects 0.000 claims description 3
- 239000010802 sludge Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 8
- 230000001133 acceleration Effects 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000005096 rolling process Methods 0.000 description 15
- 239000002920 hazardous waste Substances 0.000 description 6
- 238000004056 waste incineration Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 230000010405 clearance mechanism Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 239000010850 non-combustible waste Substances 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
- B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/14—Purification
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/1328—Waste materials; Refuse; Residues without additional clay
-
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/132—Waste materials; Refuse; Residues
- C04B33/135—Combustion residues, e.g. fly ash, incineration waste
- C04B33/1355—Incineration residues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/16—Drying solid materials or objects by processes not involving the application of heat by contact with sorbent bodies, e.g. absorbent mould; by admixture with sorbent materials
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
-
- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
- C04B2235/6567—Treatment time
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molecular Biology (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The application relates to a sintering tail gas salt capturing process, which comprises the following steps of: calcining the flammable dangerous waste to generate smoke; carbonizing the high-salt dangerous waste by using carbonization equipment to obtain carbonized waste salt and carbonized flue gas; oxidizing the carbonized waste salt by using the flue gas obtained by calcination to obtain oxidized waste salt; sequentially dissolving, filtering, cooling, crystallizing, separating and drying the oxidized waste salt to obtain inorganic salt, detecting filtered oxidized waste salt stock solution by using a sampling inspection device, and re-filtering if solid particles in the stock solution do not meet the standard; and (3) carrying out secondary combustion on the incineration flue gas and the carbonized flue gas, and then carrying out post-treatment on the obtained flue gas. The application has the effect of carrying out spot check on the stock solution filtering condition, and improves the purity of stock solution filtering.
Description
Technical Field
The application relates to the technical field of resource environments, in particular to a sintering tail gas salt capturing process.
Background
The prior domestic combustion hazardous waste incineration process generally adopts a rotary kiln combined incineration technology, hazardous solid waste enters a rotary kiln incinerator system through an automatic feeding device to be treated, solid waste is sprayed in through pressurized atomization or is conveyed in a spiral mode to enter the incinerator system to be oxidized and burnt at high temperature, tail gas is sent into a secondary combustion chamber to thoroughly decompose organic matters such as dioxin again through high-temperature oxidation at 1100 ℃, the incinerated high-temperature flue gas is discharged after being purified through waste heat utilization and tail gas matched facilities, meanwhile, the tail gas discharge meets the hazardous waste incineration pollution control standard of the national environmental protection agency, and finally the targets of reduction, harmlessness and recycling of waste disposal are achieved. However, the existing hazardous waste incineration system has the common problems of low heat energy utilization rate, high operation cost, generation of new hazardous waste, unsuitable treatment of hazardous waste containing inorganic salt of more than 3%, and the like. The existing high-salt dangerous waste treatment mode mainly adopts a landfill mode, occupies a large amount of land, and has high cost and potential risk. In addition, the existing method decomposes organic matters in the high-salt dangerous waste under the high-temperature condition, and the process for realizing the harmless and recycling of the high-salt dangerous waste requires more heat; in addition, since many inorganic salts are melted or decomposed at high temperature, the inorganic salts are slagging on the furnace wall of the existing hazardous waste incinerator, and can erode refractory materials or decompose to generate a large amount of corrosive gas, so that the incinerator cannot operate normally.
The related prior art CN 201910541452.3 relates to a method for cooperatively disposing flammable dangerous waste and high-salt dangerous waste, which utilizes high-temperature flue gas generated by burning the flammable dangerous waste to decompose organic matters in the high-salt dangerous waste, so as to realize the common disposal of the flammable dangerous waste and the high-salt dangerous waste; the method has the advantages that combustible dangerous waste and high-salt dangerous waste are cooperatively treated, the heat of dangerous waste incineration is effectively utilized, the energy consumption of high-salt dangerous waste treatment is reduced, the waste residues generated in the dangerous waste treatment process are recycled, the generation of secondary dangerous waste is reduced, and the comprehensive treatment cost of the two dangerous waste is reduced; the waste salt generated by decomposing the organic matters can be refined to produce commercial inorganic salt, and the resource product has high value and obvious economic and environmental benefits.
The related art in the above has the following drawbacks: in the process of filtering, cooling and crystallizing oxidized waste salt, if filtering is insufficient after dissolution, the purity of inorganic salt obtained by crystallization is not high, and the purity of inorganic salt can be improved only by dissolving the crystallization for many times, so that the filtering sufficiency is ensured, and the filtered stock solution can be sampled and rapidly detected, so that the filtering efficiency can be greatly improved.
Disclosure of Invention
In order to solve the problem of insufficient filtration of insoluble solid particles, the application provides a sintering tail gas trapping salt process.
The sintering tail gas salt capturing process adopts the following technical scheme:
a sintering tail gas salt capturing process comprises the following steps:
calcining the flammable dangerous waste to generate smoke;
carbonizing the high-salt dangerous waste by using carbonization equipment to obtain carbonized waste salt and carbonized flue gas;
oxidizing the carbonized waste salt by using the flue gas obtained by calcination to obtain oxidized waste salt;
sequentially dissolving, filtering, cooling, crystallizing, separating and drying the oxidized waste salt to obtain inorganic salt, detecting filtered oxidized waste salt stock solution by using a sampling inspection device, and re-filtering if solid particles in the stock solution do not meet the standard;
and (3) carrying out secondary combustion on the calcined flue gas and the carbonized flue gas, and then carrying out post-treatment on the obtained flue gas.
Further, the waste slag generated in the calcination process is insoluble calcium carbonate, the insoluble calcium carbonate and the sludge are mixed and formed, the sintered bricks are obtained after sintering, the generated flue gas and carbonized flue gas are combined and conveyed to a secondary combustion chamber, and the flue gas obtained by secondary combustion enters an air heat exchanger for heat exchange, so that combustion supporting air is provided for the secondary combustion chamber; the obtained flue gas is cooled to 550 ℃ through a heat exchanger, enters a spray quenching tower, is rapidly cooled to 200 ℃ by using desulfurization high-salt wastewater containing 4% sodium sulfate, is subjected to active carbon adsorption treatment after being cooled, and is subjected to deacidification treatment to reach the discharge standard.
Still further, be connected with the conveyer pipe between filtration equipment and the crystallization cooling equipment, the selective examination device sets up on the conveyer pipe, the selective examination device include selective examination pipe, selective examination case, set up in solenoid valve on the selective examination pipe, be used for right the detection mechanism that the interior stoste of selective examination case detected and be used for carrying out the weighing machine who detects solid particle ratio in the stoste, the selective examination pipe is used for connecting the selective examination case with the conveyer pipe.
Still further, the sampling inspection device further comprises a measuring device for detecting whether the sampling inspection box contains air, the measuring device comprises a heating mechanism for heating the sampling inspection box, a sealing mechanism for separating the sampling inspection box and the sampling inspection pipe, and the liquid level of the stock solution in the sampling inspection box is higher than that of the sealing mechanism.
Still further, closing mechanism includes the rolling disc and is used for the drive the rolling disc pivoted driving piece, the driving piece is fixed in outside the spot check pipe, the rolling disc with the spot check pipe rotates to be connected, the axis of rotation of rolling disc is located on the rolling disc symmetry plane just the axis of rotation tip of rolling disc with the output fixed connection of driving piece, rolling disc outer wall fixedly connected with sealing washer.
Still further, detection mechanism include light source, camera, with camera electric connection's display screen, the light source with the camera is located respectively the both sides of selective examination case, the selective examination case orientation the light source with the both sides of camera are the transparent plate.
Still further, weighing machine constructs including being used for carrying out filterable screening subassembly to the stock solution in the spot check case, be used for the subassembly that absorbs water to solid particle, be used for taking out the circulation subassembly to the conveyer pipe to the stock solution in the spot check case and be used for weighing solid particle's weighing sensor, screening subassembly includes the support and is fixed in non-woven fabrics in the support, the support with weighing sensor connects, the non-woven fabrics is located the entrance top of circulation subassembly.
Still further, the circulation subassembly includes circulation case and circulating pump, circulation case upper end is the opening setting, the size of non-woven fabrics is greater than circulation case upper end opening size, the circulating pump is used for with the stoste of circulation case is taken out to in the conveyer pipe.
Still further, still be provided with the fine screen device that is used for filtering once more to the stock solution that does not accord with the standard on the conveyer pipe, the fine screen device includes screening mechanism, is used for changing screening mechanism's winding mechanism and is used for carrying out the clearance mechanism of clearance to solid particle.
Still further, screening mechanism includes string and gauze roll up, the string with the gauze is rolled up and is all set up to the multistage, and string and gauze interval set up, the terminal surface size of gauze is greater than the cross-sectional size of conveyer pipe, the gauze is used for right stock solution in the conveyer pipe filters.
In summary, the beneficial technical effects of the application are:
(1) The method comprises the steps that as stock solution flows from a conveying pipe to a crystallization cooling device, an electromagnetic valve of a sampling inspection pipe is opened, the stock solution flows into a sampling inspection box, an outlet pipe is closed until the liquid level of the stock solution is above a rotating disc, a driving piece controls the rotating disc to rotate by 90 degrees, the rotating disc and a sealing ring seal the sampling inspection pipe, a heating mechanism heats the sampling inspection box, and whether bubbles are generated in the sampling inspection box is observed; starting a light source, detecting solid particles in the sampling inspection box by the light source, if the content of the solid particles in the sampling inspection box meets the standard, drawing out gauze, and pumping the stock solution in the sampling inspection box into a conveying pipe for continuous conveying;
(2) If the raw liquid particles in the sampling inspection box do not meet the standard, a control valve and an outlet pipe are opened, the raw liquid flows into a circulation box, non-woven fabrics filter the solid particles, then two servo motors are controlled to rotate in the same frequency and towards one direction, the water absorbing paper is pulled between the paper solid particles and the non-woven fabrics, the water absorbing paper can be repeatedly pulled towards the two directions, the adsorption effect on the solid particles can be accelerated when the water absorbing paper rubs with the solid particles, the drying efficiency of the solid particles is improved, the weighing effect of the solid particles is improved, the content of the solid particles in the raw liquid in unit volume is obtained according to the volume of a pumping box, and whether the solid particles exceed the standard is judged;
(3) Through two winding motors with frequently and towards a direction rotation, when gauze pulling indicates in the conveyer pipe, the gauze filters the stoste, guarantees the filter effect to the stoste, waits after crystallization cooling inorganic salt work is accomplished, and the cleaning roller is cleared up the gauze at the rotation in-process.
Drawings
Fig. 1 is a process flow diagram of an embodiment of the present application.
Fig. 2 is a schematic overall structure of an embodiment of the present application.
Fig. 3 is a schematic diagram of a spot check apparatus and a fine screening apparatus in an embodiment of the present application.
Fig. 4 is a schematic view of a seal plate and a rubber half ring in an embodiment of the present application.
Fig. 5 is a schematic view of a pull cord and absorbent paper roll and a string and gauze roll in an embodiment of the present application.
Reference numerals: 1. a crystallization cooling device; 2. a filtering device; 3. a delivery tube; 4. a spot check tube; 5. a sampling inspection box; 6. a rotating disc; 7. a driving member; 8. a light source; 9. a camera; 10. a transparent plate; 11. a weighing sensor; 12. a bracket; 13. a nonwoven fabric; 14. a circulation box; 15. a circulation pump; 16. a water pump; 17. a control valve; 18. an outlet tube; 19. a traction rope; 20. a water absorbing paper roll; 21. a traction roller; 22. a string; 23. a gauze roll; 24. a case; 25. a sealing plate; 26. a half hole; 27. a rubber half ring; 28. a winding roller; 29. a cleaning roller; 30. and (3) brushing.
Description of the embodiments
The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The embodiment of the application discloses a sintering tail gas salt capturing process. Referring to fig. 1, a sintering tail gas trapping salt process comprises the steps of:
(1) Calcining the flammable dangerous waste to obtain 800 ℃ flue gas (used for an oxidation step) and to generate nonflammable waste residues, wherein the waste residues are mainly insoluble waste residues (mainly comprising insoluble solid ferric oxide and calcium carbonate), and the waste residues enter the step (6) to be used as materials;
(2) The method comprises the steps of (1) selecting high-salt dangerous waste (85 wt% of sodium sulfate, 10% of organic components and 5wt% of water) containing sodium sulfate, and conveying the high-salt dangerous waste into carbonization equipment to obtain carbonized waste salt and carbonized flue gas; carbonizing the flue gas to enter the step (5);
(3) Oxidizing the carbonized waste salt by utilizing the flue gas in the step (1) to obtain oxidized waste salt;
(4) Dissolving, filtering, cooling and crystallizing, separating and drying the oxidized waste salt obtained in the step (3) in sequence to obtain a sodium sulfate product; crystallizing and separating the obtained mother liquor, and returning to the dissolving step; filtering to obtain insoluble substances with main components of iron, calcium, silicon and other elements, and entering the step (6);
detecting the filtered oxidized waste salt stock solution by using a sampling detection device between the steps of filtering and cooling crystallization, and re-filtering if solid particles in the stock solution do not meet the standard;
(5) Secondary combustion is carried out on the calcined smoke in the step (1) and the carbonized smoke in the step (2), and the smoke obtained by the secondary combustion enters an air heat exchanger for heat exchange at the temperature of 1200 ℃ to provide combustion-supporting air for a secondary combustion chamber; the obtained tail gas is cooled to 550 ℃ through a heat exchanger, enters a spray quenching tower, and is rapidly cooled to 200 ℃ by using desulfurization high-salt wastewater containing 4% sodium sulfate, and is subjected to deacidification treatment and then is subjected to active carbon adsorption treatment, so that the tail gas is discharged after reaching the standard.
(6) And finally, mixing and molding the non-combustible waste residue obtained in the step (1) and the insoluble substance obtained in the step (4) with sludge, and sintering at 1100 ℃ for 30min to obtain the sintered brick.
Referring to fig. 2 and 3, a conveying pipe 3 is connected between the filtering device 2 and the cooling crystallization device, a sampling device is arranged on the conveying pipe 3 and used for sampling filtered stock solution, the sampling device comprises a sampling pipe 4, a sampling box 5, an electromagnetic valve arranged on the sampling pipe 4, a detection mechanism used for detecting the stock solution in the sampling box 5 and a weighing mechanism used for detecting the solid particle ratio in the stock solution, the sampling pipe 4 is used for connecting the sampling box 5 and the conveying pipe 3, the electromagnetic valve is used for controlling the stock solution to flow into the sampling pipe 4, the sampling device further comprises a measuring device used for detecting whether air is contained in the sampling box 5, the measuring device comprises a heating mechanism used for heating the sampling box 5, a sealing mechanism used for separating the sampling box 5 and the sampling pipe 4, and the liquid level of the stock solution in the sampling box 5 is higher than that of the sealing mechanism.
The heating mechanism adopts high-temperature tail gas to heat in the embodiment, can realize the utilization of preheating the tail gas and can heat the sampling inspection box 5, the high-temperature tail gas is wrapped outside the sampling inspection box 5, the high-temperature tail gas can enter a tail gas purification system to be treated and then be discharged after heating the sampling inspection box 5, and also can enter a secondary combustion process to realize the full utilization effect of the tail gas, the sealing mechanism comprises a rotating disc 6 and a driving piece 7 for driving the rotating disc 6 to rotate, the driving piece 7 is fixed outside the sampling inspection pipe 4, the driving piece 7 is arranged as a servo motor, the rotating disc 6 is rotationally connected with the inner wall of the sampling inspection pipe 4, the axis of rotation of rolling disc 6 is located the axis of symmetry of rolling disc 6 and the axis of rotation tip and the output fixed connection of driving piece 7 of rolling disc 6, rolling disc 6 outer wall fixedly connected with sealing washer, the sealing washer sets up to the rubber circle, rolling disc 6 terminal surface size and the cross-section size adaptation of spot check tube 4, the rubber snare is established to be fixed outside rolling disc 6, the initial position of rolling disc 6 is vertical setting, be for setting up along the axis direction of spot check tube 4, after rolling disc 6 rotates to 90, the sealing washer is by the extrusion deformation this moment, realize the effect of sealing up spot check tube 4 this moment, its main objective is in order to avoid entering into the air influence in the spot check tube 4 to the detection effect of stoste internal fixation granule.
Referring to fig. 2 and 3, when the rotary disk 6 and the sealing ring seal the sampling tube 4, the sampling tube 4 achieves a sealing effect, the electromagnetic valve controls the height of the liquid level in the sampling tube 4, the liquid level is higher than the plane where the rotary disk 6 is located, the heating mechanism heats the stock solution in the sampling box 5, the purpose is mainly to detect whether air exists in the sampling box 5, bubbles easily influence the detection effect on solid particles, if no bubbles exist, the sampling box 5 is proved to have no air, if bubbles exist in the sampling box 5, the driving member 7 controls the rotary disk 6 to repeatedly rotate and rotate at an angle smaller than 45 degrees, and simultaneously opens the electromagnetic valve to stir the stock solution in the sampling box 5, and the air in the sampling box 5 has an effect of removing until no bubbles exist after the air passes through the heating in the sampling box 5.
The detection mechanism includes light source 8, camera 9, with camera 9 electric connection's display screen, accessible PLC controller control between camera 9 and the display screen, and in this embodiment camera 9 has the effect of adjusting the focus, be convenient for enlarge the demonstration in the display screen to sampling box 5, light source 8 and camera 9 are located sampling box 5's both sides respectively, sampling box 5 is transparent plate 10 towards light source 8 and camera 9's both sides, the illumination of light source 8 can cover transparent plate 10, light source 8 shines the time to sampling box 5 in, the interior stoste of sampling box 5 is showing the processing under the effect of illumination, if still there is solid particle quantity in the stoste when there is more in the stoste, it is not good to need to filter solid particle in the stoste again, if the quantity shows in solid particle in the stoste is not too much, can set up pumping pump 16 etc. at this moment and take out stoste to conveyer pipe 3 and continue to carry to the stoste in the cooling crystallization equipment to sampling box 5.
Referring to fig. 2 and 3, if solid particles are more, the solid particles need to be weighed at this time, whether the standard is exceeded or not is judged, quantitative detection is carried out on the solid particles, the weighing mechanism comprises a circulating assembly for pumping stock solution in the sampling inspection box 5 to the conveying pipe 3 and a weighing sensor 11 for weighing the solid particles, the screening assembly comprises a support 12 and a non-woven fabric 13 fixed in the support 12, the support 12 is connected with the weighing sensor 11, the non-woven fabric 13 is located above an inlet of the circulating assembly, the circulating assembly comprises a circulating box 14 and a circulating pump 15, the upper end of the circulating box 14 is provided with an opening, the size of the non-woven fabric 13 is larger than the size of the opening at the upper end of the circulating box 14, and the circulating pump 15 is used for pumping stock solution in the circulating box 14 to the conveying pipe 3. The bottom of the sampling inspection box 5 is also provided with an outlet pipe 18 and a control valve 17 arranged on the outlet pipe 18, the bottom of the outlet pipe 18 is provided with an opening and extends to the upper part of the non-woven fabric 13, and the control valve 17 is used for controlling the opening/closing of the outlet pipe 18.
When the solid particles are required to be weighed, the control valve 17 is opened, the stock solution in the sampling inspection box 5 flows into the circulation box 14 from the outlet pipe 18, the non-woven fabric 13 detects the solid particles, the effect of filtering the solid particles is achieved, and at the moment, the stock solution in the circulation box 14 can be pumped into the conveying pipe 3 through the circulation pump 15 and enters the cooling crystallization equipment; in order to improve the weighing efficiency of the filtered solid particles, a drying mechanism for drying the solid particles is further provided in the embodiment.
Referring to fig. 2 and 3, the drying mechanism includes the drying rack with sampling inspection box 5 fixed connection, haulage rope 19, the scroll 20 that absorbs water, two traction rollers 21 and two servo motor that set up with the same frequency, traction roller 21 rotates with the drying rack to be connected, the axis direction perpendicular to stoste of traction roller 21 flows reverse, the haulage rope 19 sets up to the multistage, and the scroll 20 that absorbs water also divide into the multistage, be haulage rope 19 and the paper that absorbs water promptly for interval arrangement (as shown in fig. 5), and haulage rope 19 is located both ends, consequently, haulage rope 19 and the corresponding traction roller 21 perisporium fixed connection, the paper that absorbs water is located between solid particle and non-woven fabrics 13, when initial state, haulage rope 19 is located non-woven fabrics 13 top, after the non-woven fabrics 13 accomplishes the filtration to solid particle, control two servo motor with the same frequency and rotate towards a direction this moment, the paper that absorbs water is pulled to between solid particle and the non-woven fabrics 13, can repeatedly be oriented two directions pulling the paper that absorbs water, also can accelerate the effect that adsorbs solid particle when carrying out the friction, promote the solid particle drying efficiency, promote the solid particle dry efficiency, the solid particle is dried, the solid particle is measured to the volume, the solid particle is measured to the volume is measured to the solid particle, the solid particle is measured to the volume is avoided, the solid particle is weighed, the solid particle is measured to the volume is measured to the solid particle, the volume is measured, the solid particle is measured, and the volume is measured.
Referring to fig. 2 and 3, the conveying pipe 3 is further provided with a fine screening device for filtering the stock solution which does not meet the standard, the fine screening device comprises a screening mechanism, a winding mechanism for replacing the screening mechanism and a cleaning mechanism for cleaning solid particles, the screening mechanism comprises a string 22 and a gauze roll 23, the string 22 and the gauze roll 23 are also arranged in a plurality of sections, the string 22 and the gauze are arranged at intervals, the end face size of the gauze is larger than the section size of the conveying pipe 3, and the gauze is used for filtering the stock solution in the conveying pipe 3.
Referring to fig. 3 and 4, two boxes 24 are fixedly connected to the outer wall of the conveying pipe 3, the connection position between the boxes 24 and the conveying pipe 3 is an opening, the boxes 24 are slidably connected with two sealing plates 25 at the opening, the sealing plates 25 are provided with half holes 26, rubber semi-rings 27 are fixedly connected in the half holes 26, driving of the sealing plates 25 is realized by an air cylinder or an electric cylinder, the two sealing plates 25 move relatively, the boxes 24 are provided with sliding holes for the movement of the sealing plates 25, rubber rings are also arranged at the sliding holes in the embodiment, and are used for sealing the sliding positions of the sealing plates 25, and the gap between the two rubber semi-rings 27 is smaller than the section size of the string 22; in the initial state, the string 22 is positioned in the delivery pipe 3, and the rubber semi-ring 27 seals the string 22.
Referring to fig. 2 and 3, the winding mechanism includes two winding rollers 28 and two winding motors, the axial direction of the winding rollers 28 is parallel to the axial direction of the traction roller 21, the winding motors are installed outside the box 24, and the output ends of the winding motors are coaxially fixed with the end parts of the traction roller 21, in this embodiment, the sampling box 5 is located at the rear of the gauze, that is, the sampling box 5 still can perform sampling on the raw liquid filtered by the gauze, and if the sampling is failed, the sampling box rotates in the same frequency and towards one direction by the two winding motors, and when the gauze pulls the finger conveying pipe 3, the gauze filters the raw liquid. The cleaning mechanism can be arranged at one or two positions, the cleaning mechanism is arranged in the box 24 and comprises a cleaning roller 29 rotationally connected in the box 24, bristles 30 fixed on the outer wall of the cleaning roller 29 and a cleaning motor used for driving the cleaning roller 29, the cleaning motor is arranged outside the box 24, the bristles 30 are abutted with gauze, when attention is required, the cleaning roller 29 is arranged at a position between the winding roller 28 and the sealing plate 25, and the cleaning roller 29 cleans the gauze in the rotation process.
The implementation principle of the sintering tail gas salt capturing process in the embodiment of the application is as follows: as the stock solution flows from the conveying pipe 3 to the position of the cooling crystallization equipment, the electromagnetic valve of the sampling inspection pipe 4 is opened, the stock solution flows into the sampling inspection box 5, the outlet pipe 18 is closed, the driving piece 7 controls the rotating disk 6 to rotate 90 degrees until the stock solution level is above the rotating disk 6, the rotating disk 6 and the sealing ring seal the sampling inspection pipe 4, the heating mechanism heats the sampling inspection box 5, and whether bubbles are generated in the sampling inspection box 5 is observed; and then the light source 8 is started, the light source 8 detects solid particles in the sampling inspection box 5, if the content of the solid particles in the sampling inspection box 5 meets the standard, the gauze does not need to be pulled down, and the stock solution in the sampling inspection box 5 is pumped into the conveying pipe 3 to be continuously conveyed.
If stock solution particles in the sampling inspection box 5 do not accord with the standard, the control valve 17 and the outlet pipe 18 are opened, stock solution flows into the circulation box 14, the non-woven fabric 13 filters solid particles, the two servo motors are controlled to rotate in the same frequency and towards one direction, the water absorbing paper is pulled between the paper solid particles and the non-woven fabric 13, the water absorbing paper can be repeatedly pulled towards the two directions, the adsorption effect on the solid particles can be accelerated when the water absorbing paper rubs with the solid particles, the drying efficiency of the solid particles is improved, the weighing effect of the solid particles is achieved, the content of the solid particles in the stock solution of unit volume is obtained according to the volume of the pumping box, and whether the solid particles exceed the standard is judged.
Simultaneously, the gauze needs to be pulled down, the gauze rotates towards one direction at the same frequency through the two winding motors, when the gauze is pulled into the conveying pipe 3, the gauze filters the stock solution, the filtering effect of the stock solution is guaranteed, and after the crystallization and cooling of the inorganic salt are finished, the cleaning roller 29 cleans the gauze in the rotation process.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (5)
1. The process for capturing salt by sintering tail gas is characterized by comprising the following steps of:
calcining the flammable dangerous waste to generate smoke;
carbonizing the high-salt dangerous waste by using carbonization equipment to obtain carbonized waste salt and carbonized flue gas;
oxidizing the carbonized waste salt by using the flue gas obtained by calcination to obtain oxidized waste salt;
sequentially dissolving, filtering, cooling, crystallizing, separating and drying the oxidized waste salt to obtain inorganic salt, detecting filtered oxidized waste salt stock solution by using a sampling inspection device, and re-filtering if solid particles in the stock solution do not meet the standard;
secondary combustion is carried out on the calcined flue gas and the carbonized flue gas, and then the obtained flue gas is subjected to post-treatment; a conveying pipe (3) is connected between the filtering equipment (2) and the crystallization cooling equipment (1), a sampling device is arranged on the conveying pipe (3), the sampling device comprises a sampling pipe (4), a sampling box (5), an electromagnetic valve arranged on the sampling pipe (4), a detection mechanism for detecting stock solution in the sampling box (5) and a weighing mechanism for detecting the solid particle ratio in the stock solution, and the sampling pipe (4) is used for connecting the sampling box (5) and the conveying pipe (3); the sampling inspection device further comprises a measuring device for detecting whether the sampling inspection box (5) contains air or not, the measuring device comprises a heating mechanism for heating the sampling inspection box (5), and a sealing mechanism for separating the sampling inspection box (5) and the sampling inspection pipe (4), and the liquid level of the stock solution in the sampling inspection box (5) is higher than that of the sealing mechanism; the detection mechanism comprises a light source (8), a camera (9) and a display screen electrically connected with the camera (9), wherein the light source (8) and the camera (9) are respectively positioned at two sides of the sampling inspection box (5), and the sampling inspection box (5) faces the light source (8) and the two sides of the camera (9) are transparent plates (10); the weighing mechanism comprises a screening component for filtering stock solution in the sampling inspection box (5), a water absorption component for absorbing water of solid particles, a circulating component for pumping the stock solution in the sampling inspection box (5) to the conveying pipe (3) and a weighing sensor (11) for weighing the solid particles, wherein the screening component comprises a support (12) and a non-woven fabric (13) fixed in the support (12), the support (12) is connected with the weighing sensor (11), and the non-woven fabric (13) is positioned above an inlet of the circulating component; the conveying pipe (3) is also provided with a fine screening device for filtering the stock solution which does not meet the standard, and the fine screening device comprises a screening mechanism, a winding mechanism for replacing the screening mechanism and a cleaning mechanism for cleaning solid particles; a drying mechanism for drying the solid particles is also arranged; the drying mechanism comprises a drying frame fixedly connected with the sampling inspection box (5), a traction rope (19), a water absorption paper roll (20), two traction rollers (21) and two servo motors which are arranged at the same frequency, wherein the traction rollers (21) are rotationally connected with the drying frame, the axial direction of the traction rollers (21) is perpendicular to the flowing direction of the stock solution, the traction rope (19) is arranged into a plurality of sections, the water absorption paper roll (20) is also divided into a plurality of sections, the traction rope (19) and the water absorption paper are arranged at intervals, the traction rope (19) is positioned at two ends, the traction rope (19) is fixedly connected with the peripheral wall of the corresponding traction roller (21), the water absorption paper is positioned between the solid particles and the non-woven fabric (13), when the non-woven fabric (13) finishes filtering the solid particles, the two servo motors are controlled to rotate at the same frequency and towards one direction, the water absorption paper is pulled between the solid particles and the non-woven fabric (13), the water absorption paper is repeatedly pulled towards the two directions, and the solid particles are adsorbed by acceleration when friction is performed between the water absorption paper and the solid particles; promote the dry efficiency of solid particle, until the dry back of solid particle, with haulage rope (19) pulling to solid particle below, avoid the paper that absorbs water to influence the work of weighing of solid particle, utilize weighing sensor (11) and rather than electric connection's weighing screen, accomplish the effect of weighing of solid particle, obtain the content of solid particle in the stoste of unit volume according to the volume of pumping tank, judge whether solid particle exceeds the standard.
2. The process for capturing salt by sintering tail gas according to claim 1, wherein the waste residue generated in the calcination process is insoluble calcium carbonate, the insoluble calcium carbonate is mixed with sludge for molding, the mixture is sintered to obtain a sintered brick, the generated flue gas and carbonized flue gas are combined and conveyed to a secondary combustion chamber, and the flue gas obtained by secondary combustion enters an air heat exchanger for heat exchange; providing combustion-supporting air for the secondary combustion chamber; the obtained flue gas is cooled to 550 ℃ through a heat exchanger, enters a spray quenching tower, is rapidly cooled to 200 ℃ by using desulfurization high-salt wastewater containing 4% sodium sulfate, is subjected to active carbon adsorption treatment after being cooled, and is subjected to deacidification treatment to reach the discharge standard.
3. The process for capturing salt by using sintering tail gas according to claim 2, wherein the sealing mechanism comprises a rotating disc (6) and a driving piece (7) for driving the rotating disc (6) to rotate, the driving piece (7) is fixed outside the sampling tube (4), the rotating disc (6) is rotationally connected with the sampling tube (4), a rotating shaft of the rotating disc (6) is positioned on a symmetrical surface of the rotating disc (6), the rotating shaft end part of the rotating disc (6) is fixedly connected with the output end of the driving piece (7), and a sealing ring is fixedly connected with the outer wall of the rotating disc (6).
4. A sintering tail gas salt capturing process according to claim 3, wherein the circulating assembly comprises a circulating box (14) and a circulating pump (15), the upper end of the circulating box (14) is provided with an opening, the size of the non-woven fabric (13) is larger than the opening size of the upper end of the circulating box (14), and the circulating pump (15) is used for pumping the stock solution of the circulating box (14) into the conveying pipe (3).
5. The process for capturing salt by sintering tail gas according to claim 4, wherein the screening mechanism comprises a string (22) and a gauze roll (23), the string (22) and the gauze roll (23) are arranged in a plurality of sections, the string (22) and the gauze are arranged at intervals, the end face size of the gauze is larger than the section size of the conveying pipe (3), and the gauze is used for filtering raw liquid in the conveying pipe (3).
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| CN202310954032.4A CN117003261B (en) | 2023-07-31 | 2023-07-31 | Sintering tail gas salt capturing process |
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| EP0898161A2 (en) * | 1997-08-20 | 1999-02-24 | Ngk Insulators, Ltd. | Method for detection of solid particles in fluid and particle sensor used in said method |
| CN112284958A (en) * | 2020-09-08 | 2021-01-29 | 中石化宁波工程有限公司 | System and method for measuring solid content of gas conveyed by pipe |
| CN115407014A (en) * | 2022-08-03 | 2022-11-29 | 江苏中建商品混凝土有限公司 | Method and device for rapidly detecting solid content of waste slurry produced in mixing plant |
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2023
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3320428A (en) * | 1963-05-06 | 1967-05-16 | British Petroleum Co | Photosensitive apparatus for detecting solid particles suspended in liquid |
| EP0898161A2 (en) * | 1997-08-20 | 1999-02-24 | Ngk Insulators, Ltd. | Method for detection of solid particles in fluid and particle sensor used in said method |
| CN112284958A (en) * | 2020-09-08 | 2021-01-29 | 中石化宁波工程有限公司 | System and method for measuring solid content of gas conveyed by pipe |
| CN115407014A (en) * | 2022-08-03 | 2022-11-29 | 江苏中建商品混凝土有限公司 | Method and device for rapidly detecting solid content of waste slurry produced in mixing plant |
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