CN112933905A - Efficient and energy-saving graphitized tail gas treatment system and treatment process thereof - Google Patents
Efficient and energy-saving graphitized tail gas treatment system and treatment process thereof Download PDFInfo
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- CN112933905A CN112933905A CN202110124763.7A CN202110124763A CN112933905A CN 112933905 A CN112933905 A CN 112933905A CN 202110124763 A CN202110124763 A CN 202110124763A CN 112933905 A CN112933905 A CN 112933905A
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- 239000000428 dust Substances 0.000 claims abstract description 53
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
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- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 12
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/14—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- 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
- B01D53/75—Multi-step processes
-
- 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
- B01D53/74—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
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
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- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an efficient and energy-saving graphitized tail gas treatment system and a treatment process thereof, wherein sulfur in furnace burden and products overflows when the graphitized furnace burden and the products are heated to the temperature range of 1000-2200 ℃, and the sulfur is mixed with air in a furnace cover to generate SO2When the furnace temperature reaches 800-Entering a multi-tube ceramic dust remover for dust removal, entering the existing absorption tower through a fan, purifying in the absorption tower, removing water mist through a spray removal system and a demister, and then discharging into the atmosphere through a direct discharge chimney, wherein the absorption tower is provided with a desulfurization slurry preparation system and a slurry supply system. The invention provides a novel tail gas treatment scheme to gradually purify and reduce the emission of waste gas pollutants, improve the absorption efficiency of tail gas, reduce the dust amount in the tail gas, and has the advantages of low equipment operation energy consumption, simple structure, convenient manufacture and installation, high reliability and good adaptability.
Description
Technical Field
The invention relates to an efficient and energy-saving graphitized tail gas treatment system and a treatment process thereof, and belongs to the technical field of tail gas purification treatment.
Background
Graphitization is the core process of artificial graphite, in which a hexagonal carbon atom plane network is changed from non-overlapping two-dimensional space to ordered overlapping three-dimensional space by high-temperature treatment at 2300 ℃, impurity elements contained in raw material asphalt and coke powder react with oxygen and are released from an exhaust port of a graphitization furnace in a gas form, and a part of unreacted elements and sulfur dioxide and dust escaping from the raw material at high temperature are also released from the exhaust port of the graphitization furnace.
The existing tail gas is mainly treated by the following technology, the temperature of the sulfur-containing tail gas discharged from a graphitization furnace reaches 170-190 ℃, the sulfur-containing tail gas is conveyed by an air pipe and firstly enters a graphite heat exchanger, the temperature of the tail gas is reduced to 70-75 ℃ from 170-190 ℃ after passing through the graphite heat exchanger, and the tail gas cooled to 70-75 ℃ is subjected to alkali liquor spray tower under the action of an induced draft fan. The spray tower is formed by connecting four stages of alkali liquor turbulence absorption towers in series, the first stage is connected with a cooling device, and the rear part of the fourth stage is connected with an exhaust device. The corrosion-resistant pump inputs alkali liquor into the absorption tower, and when tail gas passes through the absorption tower, the alkali liquor absorbs harmful gases such as sulfur dioxide in the tail gas. The absorption medium is NaOH solution, and the concentration of the alkali liquor is 15-20%. The concentration of residual chlorine in the purified tail gas is less than 10mg/Nm3The concentration of sulfur dioxide is less than 200mg/Nm3And the tail gas reaching the standard is discharged through an exhaust funnel under the action of a draught fan.
The prior art has the following defects: 1. the air exhaust pressure in the furnace is unstable, so that the safety and the efficiency are influenced; 2. the quantity of equipment is large, and the energy consumption is high; 3. when tail gas flows through the heat exchanger, sticky matters are easy to condense and precipitate on the surface of the heat exchanger, the heat exchanger pipeline is often blocked, each furnace needs to be cleaned at regular time, and certain restriction is formed on normal production; 4. only one device can process the smoke of one graphitization furnace, and multiple sets of devices are required to be built, so that the cost is high; 5. the discharge of the formed caustic sludge easily causes environmental problems.
Disclosure of Invention
In order to solve the technical problem, the invention discloses a high-efficiency energy-saving graphitized tail gas treatment system which sequentially comprises a tail gas collection system, a cooling system, a dedusting system and a desulfurization system,
the tail gas collecting system is a waste gas hood which is provided with a quick connector and is connected with the cooling system through the quick connector,
the cooling system is an air-cooled cooler which is provided with an axial flow fan,
the dust removal system is a multi-pipe cyclone dust collector, an induced draft fan is arranged between the dust removal system and the desulfurization system,
the desulfurization system is a three-stage desulfurization purification tower and comprises a first desulfurization tower, a second desulfurization tower and a third desulfurization tower, wherein the three-stage desulfurization purification tower is provided with an inspection manhole and a demister, the three-stage desulfurization purification tower is made of PP (polypropylene) plates, three spraying layers are arranged in the three-stage desulfurization purification tower, the demister is a periodically cleaned demister,
the desulfurization system is also connected with a desulfurization slurry preparation system and a slurry supply system.
Further: the waste gas cover is provided with three sections, and the inner flue of the waste gas cover adopts a gradually-changed trapezoidal flue.
Further: the air cooling cooler comprises an air inlet, an air flow distribution plate, a cooling array pipe, an axial flow fan, an ash hopper, a discharger, a platform ladder and an air outlet.
Further: the multi-pipe cyclone dust collector comprises an air inlet, a ceramic guider, a plurality of cyclones, a dust hopper, a steel bracket, a dust collection box, a dust valve and an air outlet, wherein the cyclones are made of cast iron or ceramic.
Further: every layer sprays the layer and includes that a female pipe, a plurality of branch pipes and rule distribute be in nozzle on the branch pipe, just it all adopts the special PP pipeline of desulfurization to spray the layer, the nozzle is the eddy current type nozzle of carborundum material, every layer it is equipped with groined type rack to spray below the layer additional.
Further: the inspection manhole adopts high-strength organic glass as a panel material.
Further: the demister is a corrugated baffle and comprises a first-stage demister and a second-stage demister which are parallel to each other, and the first-stage demister is arranged at the lower part of the second-stage demister.
Further: the desulfurization slurry preparation system comprises a lime powder bin, an alkali liquor stirring tank, a lime stirring tank, a clean water tank, a regeneration tank, a sedimentation tank and a circulation tank, wherein the alkali liquor stirring tank and the lime stirring tank are respectively provided with a stirrer and a slurry pump.
A treatment process of an efficient and energy-saving graphitized tail gas treatment system comprises the following treatment steps:
the method comprises the following steps: when the furnace temperature of the graphitization furnace reaches 800-,
step 2: the air-cooled cooler of the cooling system is connected for cooling through the quick connector,
the method comprises the following steps: the cooled flue gas enters a multi-pipe cyclone dust collector,
the method comprises the following steps: after dust removal, the mixture enters a three-stage desulfurization purification tower through a draught fan, is purified in the three-stage desulfurization purification tower, is directly discharged into the atmosphere after water mist is removed through a spray demister,
the method comprises the following steps: the desulfurization slurry preparation system conveys the desulfurizer slurry to be used to a three-level desulfurization purification tower through a desulfurization pump through a slurry supply system, the saturated desulfurizer is dehydrated by a centrifugal machine and then is recycled and dried, and the extruded clear water flows into the slurry supply system again for recycling.
Further, tertiary desulfurization purification tower adopts PP panel preparation, and the hot plastic of panel length cutting back as required is stereotyped, adopts high-power hot melt welding machine welding again, and the welding is being consolidated after installing the waistband of equal thickness additional in tower body weld opening outside, and the bottom plate is with tower body linking department welding set-square reinforcement processing, and nozzle pressure is 0.5 ~ 3kg in the tertiary desulfurization purification tower, and the defroster flushing medium is the process water, washes the liquid level in the back supplementary and the regulation tertiary desulfurization purification tower.
Has the advantages that: the invention provides a novel tail gas treatment scheme to gradually purify and reduce the emission of waste gas pollutants so as to achieve the development goal of long-term operation.
Drawings
Figure 1 is a schematic diagram of the system architecture of the present invention,
reference numerals: 1-a waste gas hood, 2-an air cooling cooler, 3-a multi-pipe cyclone dust collector, 4-a first desulfurizing tower, 5-a second desulfurizing tower, 6-a third desulfurizing tower, 7-an induced draft fan, 8-a lime stirring tank, 9-an alkali liquor stirring tank, 10-a lime powder bin, 11-an oxidation fan, 12-a centrifugal machine, 13-a back flush pump, 14-a slurry pump, 15-a desulfurizing pump, 16-a clean water tank, 17-a regeneration tank, 18-a settling tank, 19-a circulating tank and 20-a graphitizing furnace.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
As shown in FIG. 1, the high-efficiency energy-saving graphitized tail gas treatment system of the invention sequentially comprises a tail gas collection system, a cooling system, a dedusting system and a desulfurization system,
the tail gas collecting system is a waste gas hood 1, the waste gas hood 1 is provided with a quick coupling, the waste gas hood 1 is provided with three sections, the inner flue adopts a gradually-changed trapezoidal flue and is connected with a cooling system through the quick coupling,
the cooling system is an air-cooled cooler 2, an axial flow fan is arranged on the air-cooled cooler 2, the air-cooled cooler 2 comprises an air inlet, an air flow distribution plate, a cooling tube array, the axial flow fan, an ash hopper, a discharger, a platform ladder and an air outlet, the cooling tube array is a phi 89 steel tube,
the dust removal system is a multi-pipe cyclone dust collector 3, the multi-pipe cyclone dust collector 3 comprises an air inlet, a ceramic guider, a plurality of cyclones, a dust hopper, a steel bracket, a dust collection box, a dust valve and an air outlet, the cyclones are made of cast iron or ceramic, the thickness of the cyclones is more than 6mm, a draught fan 7 is arranged between the dust removal system and the desulfurization system,
the desulfurization system is a three-stage desulfurization purification tower, which comprises a first desulfurization tower 4, a second desulfurization tower 5 and a third desulfurization tower 6, wherein the three-stage desulfurization purification tower is provided with an inspection manhole and a demister, the inspection manhole adopts high-strength organic glass as a panel material, the demister is a corrugated baffle and comprises a first-stage demister and a second-stage demister which are parallel to each other, the first-stage demister is arranged at the lower part of the second-stage demister, the three-stage desulfurization purification tower is made of PP plates, three spraying layers are arranged in the three-stage desulfurization purification tower, each spraying layer comprises a main pipe, a plurality of branch pipes and nozzles regularly distributed on the branch pipes, the spraying layers all adopt PP pipelines special for desulfurization, the nozzles are vortex type nozzles made of silicon carbide materials, a # -shaped net rack is additionally arranged below each spraying layer,
the desulfurization system is also connected with a desulfurization slurry preparation system and a slurry supply system. The desulfurization slurry preparation system comprises a lime powder bin 10, an alkali liquor stirring tank 9, a lime stirring tank 8, a clean water tank 16, a regeneration tank 17, a sedimentation tank 18 and a circulation tank 19, wherein both the alkali liquor stirring tank 9 and the lime stirring tank 8 are provided with a stirrer and a slurry pump.
A treatment process of an efficient and energy-saving graphitized tail gas treatment system comprises the following treatment steps:
step 1: when the furnace temperature of the graphitization furnace 20 reaches 800-,
step 2: the air-cooled cooler 2 of the cooling system is connected through the quick connector for cooling,
and step 3: the cooled flue gas enters a multi-pipe cyclone dust collector 3,
and 4, step 4: after dust removal, the mixture enters a three-stage desulfurization purification tower through a draught fan 7, is purified in the three-stage desulfurization purification tower, is directly discharged into the atmosphere after water mist is removed through a spray demister,
and 5: the desulfurization slurry preparation system conveys the desulfurizer slurry to be used to a three-level desulfurization purification tower through a desulfurization pump 15 through a slurry supply system, the saturated desulfurizer is dehydrated by a centrifugal machine 12 and then is recycled and dried, and the extruded clear water flows into the slurry supply system again for recycling.
Tertiary desulfurization purifying column adopts the preparation of PP panel, and the hot plastic of panel length cutting back as required is stereotyped, adopts high-power hot melt welding machine welding again, and the welding is being consolidated and is being welded after installing the waistband of equal thickness additional outside the tower body weld opening, and the bottom plate is with tower body linking department welding set-square reinforcement processing, and nozzle pressure is 0.5 ~ 3kg in the tertiary desulfurization purifying column, and the defroster flushing medium is the process water, washes the liquid level in the back supplementary and the tertiary desulfurization purifying column of regulation. The invention adopts a double alkali method for desulfurization, and is provided with an alkali liquor stirring tank 9 and a lime stirring tank 8, wherein each stirring tank is provided with a stirrer and a slurry pump, the slurry after the raw materials enter the stirring tanks and are fully stirred is input into a desulfurization tank by the slurry pump for mixing, the saturated desulfurizing agent is dehydrated by a centrifugal machine 12 and then is recycled and dried, and the extruded clear water flows into a slurry supply system again for recycling.
The waste gas hood 1 and the quick connector are arranged, the waste gas is collected inside the waste gas hood 1 by the smoke gas overflowed in the graphitization process, and then the waste gas is sucked away and purified by the negative pressure of the induced draft fan 7. The whole waste gas hood 1 is divided into three sections, the waste gas hood is convenient to lift when moving, the inner flue adopts a gradually-changed trapezoidal flue, the requirement of suction and catching is met by the minimum air quantity and the minimum air speed, an even micro-negative pressure environment is formed in the waste gas hood 1, the smoke is prevented from overflowing, and the explosion accident caused by overhigh concentration of carbon monoxide generated by positive pressure is avoided. The quick coupling can make things convenient for switching between the different stoves, improves work efficiency, can realize the demand of discharging fume of many stoves simultaneously.
The cooler adopts an air cooling cooler 2, belongs to one of forced cooling, and mainly comprises an air inlet, an air outlet, a cooling tube nest, an axial flow fan, an ash bucket, a platform ladder and the like. When high-temperature flue gas enters the cooler, the flow velocity of the flue gas is reduced, the flue gas enters a plurality of phi 89 steel pipes through the air flow distribution plate, the hot flue gas is in contact with the pipe wall to perform heat exchange, and meanwhile, the axial flow fan arranged on one side of the device is opened to perform forced air cooling on the pipe wall, so that the heat exchange speed is increased to achieve the purpose of rapid cooling. Because the flue gas velocity of flow reduces, in some large granule dust that mix with in the flue gas can fall the ash bucket naturally, the dust of preventing gathering discharges through ash bucket bottom tripper.
The dust remover adopts a ceramic multi-pipe cyclone dust remover, which mainly comprises an air inlet, an air outlet, a plurality of ceramic cyclones, an ash bucket, a steel bracket and the like. This cyclone dust remover is when dirty gas gets into the dust remover, through the ceramic director, at the inside high-speed rotation of whirlwind, under the effect of centrifugal force, dust and gas separation, the dust descends in the dust collection box, discharges through the ash valve, and the gaseous whirl that rises that forms of purification converges in the collection chamber through the exhaust manifold, discharges by the chimney through the export, reaches dust removal effect.
Tertiary desulfurization purifying column adopts the preparation of PP panel, and panel adopts high-power hot melt welding machine welding after the design is moulded to heat after the length cutting as required, and the welding is being consolidated after installing the waistband of equal thickness additional in tower body weld opening outside, and the bottom plate is consolidated with tower body interlinkage department welding set-square and is handled, and every layer sprays and installs groined type rack below the layer additional, and the intensity of reinforcing barrel conveniently sprays the maintenance on layer simultaneously.
The inspection manhole position adopts high strength organic glass as panel material, and intensity is high, and shock-resistant, the transparency is high, can the audio-visual operating condition who sees the interior shower nozzle of tower when the operation.
The spraying system can enable the slurry to be uniformly distributed in the three-stage desulfurization purification tower, and the flow passing through each spraying layer is equal. The nozzles are optimally arranged so as to spray the three-stage desulfurization purification tower on the section almost completely and uniformly. The method adopts three spraying layers, each spraying layer consists of a main pipe, a plurality of branch pipes and nozzles regularly distributed on the branch pipes, and the three layers share 1 absorption tower circulating pump. The slurry spraying system adopts a PP pipeline special for desulfurization. All nozzles can avoid rapid abrasion, scaling and blockage, and the nozzles are high-quality vortex nozzles made of silicon carbide materials. The nozzle has 0.5-3 kg pressure to ensure the atomization effect of the slurry. The design of the nozzle and the pipeline is convenient for maintenance, washing and replacement.
The demister is used to collect entrained water droplets in all operating conditions of the absorption tower and generally consists of a first demister installed at the lower part and a second demister installed at the upper part. The demister parallel to each other is a corrugated baffle, and when flue gas flows through the demister, liquid drops are left on the baffle due to the inertia effect, so that the demister has the function of demisting. Since the retained droplets also contain solids, mainly gypsum, and thus risk scaling on the baffles, periodically operated cleaning devices are provided, including demister flushing manifolds and nozzle systems. The flushing medium is process water, which is also used to replenish and regulate the liquid level in the absorption column. When gas containing mist flows through the demister at a certain speed, the mist collides with the corrugated plate and is attached to the surface of the corrugated plate due to the inertial impact of the gas. The dispersion of the mist on the surface of the corrugated plate and the gravity sedimentation of the mist enable the mist to form larger liquid drops and move forwards to the turning position of the corrugated plate along with the air flow, the liquid drops are larger and larger due to the turning centrifugal force, the friction action and the adsorption action of the turning centrifugal force and the corrugated plate and the surface tension of the liquid, and the liquid drops are separated from the surface of the corrugated plate until the accumulated liquid drops are large enough that the gravity generated by the accumulated liquid drops exceeds the resultant force of the rising force of the air and the surface tension of the liquid. The multi-fold of defroster wave plate has increased the chance that the mist foam is caught to the structure, and the mist foam that is not got rid of is caught the collection through the same effect in next turning, and the repeated action like this to defogging efficiency has been improved greatly. After passing through the corrugated plate mist eliminator, the gas is substantially free of entrainment. The demister system consists of a demister body and a flushing system. Generally comprises a demister body with two stages and different specifications, a flushing water pipeline, a nozzle, a support frame, a support beam, related connections, a fixing part, a sealing part and the like.
The demister flushing system can completely flush the demister and cannot have surfaces which are not flushed. The pressure of the flush water should be monitored and controlled and the flush water header should be arranged so that each nozzle operates at substantially the average water pressure.
The flue of the waste gas hood 1 adopts a gradually-changed trapezoidal flue, so that the air quantity and the air speed with the minimum quantity meet the absorption and catching requirements, a uniform micro-negative pressure environment is formed in the furnace hood, and the effect of stabilizing the air pressure can be realized; the axial flow fan is added in the cooler to perform forced air cooling on the flue gas, so that the cooling effect can be enhanced, and meanwhile, the flow velocity of the flue gas can be reduced, so that dust sinks into the dust hopper, the problem that the heat exchange pipe is blocked by the dust is solved, and the device can run for a long time; the ceramic multi-pipe cyclone dust collector is a high-efficiency dust collector, the efficiency of the dust collector can reach more than 95%, and the resistance of the dust collector body is lower than 900 Pa. The dust remover has good load adaptability, and the dust removal efficiency is over 90 percent when the load is 70 percent. The cyclone is made of cast iron or ceramic, so that the cyclone has good wear resistance; compared with the original 4-stage purification tower, the three-stage desulfurization purification tower needs less auxiliary equipment, and has low equipment cost and low energy consumption; the water consumption in the system mainly comprises: the water recycling can be realized by arranging a horizontal centrifuge and a circulating water tank, and the energy consumption is reduced. Emission indexes after dust removal and desulfurization are as follows: smoke dust<30mg/m3、SO2<100mg/m3And the desulfurization efficiency is more than 95 percent.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. An energy-efficient graphitization tail gas processing system which is characterized in that: sequentially comprises a tail gas collecting system, a cooling system, a dedusting system and a desulphurization system,
the tail gas collecting system is a waste gas hood (1), the waste gas hood (1) is provided with a quick joint and is connected with the cooling system through the quick joint,
the cooling system is an air-cooled cooler (2), an axial flow fan is arranged on the air-cooled cooler (2),
the dust removal system is a multi-pipe cyclone dust collector (3), an induced draft fan (7) is arranged between the dust removal system and the desulfurization system,
the desulfurization system is a three-stage desulfurization purification tower and comprises a first desulfurization tower (4), a second desulfurization tower (5) and a third desulfurization tower (6), wherein the three-stage desulfurization purification tower is provided with an inspection manhole and a demister, the three-stage desulfurization purification tower is made of PP (polypropylene) plates, three spraying layers are arranged in the three-stage desulfurization purification tower, the demister is a periodically cleaned demister,
the desulfurization system is also connected with a desulfurization slurry preparation system and a slurry supply system.
2. The system for treating graphitized tail gas with high efficiency and energy conservation according to claim 1, characterized in that: the waste gas hood (1) is provided with three sections, and the inner flues of the waste gas hood adopt gradually-changed trapezoidal flues.
3. The system for treating graphitized tail gas with high efficiency and energy conservation according to claim 1, characterized in that: the air cooling cooler (2) comprises an air inlet, an air flow distribution plate, a cooling array pipe, an axial flow fan, an ash hopper, a discharger, a platform ladder and an air outlet.
4. The system for treating graphitized tail gas with high efficiency and energy conservation according to claim 1, characterized in that: the multi-pipe cyclone dust collector (3) comprises an air inlet, a ceramic guider, a plurality of cyclones, a dust hopper, a steel bracket, a dust collection box, a dust discharge valve and an air outlet, wherein the cyclones are made of cast iron or ceramic.
5. The system for treating graphitized tail gas with high efficiency and energy conservation according to claim 1, characterized in that: every layer sprays the layer and includes that a female pipe, a plurality of branch pipes and rule distribute be in nozzle on the branch pipe, just it all adopts the special PP pipeline of desulfurization to spray the layer, the nozzle is the eddy current type nozzle of carborundum material, every layer it is equipped with groined type rack to spray below the layer additional.
6. The system for treating graphitized tail gas with high efficiency and energy conservation according to claim 1, characterized in that: the inspection manhole adopts high-strength organic glass as a panel material.
7. The system for treating graphitized tail gas with high efficiency and energy conservation according to claim 1, characterized in that: the demister is a corrugated baffle and comprises a first-stage demister and a second-stage demister which are parallel to each other, and the first-stage demister is arranged at the lower part of the second-stage demister.
8. The system for treating graphitized tail gas with high efficiency and energy conservation according to claim 1, characterized in that: the desulfurization slurry preparation system comprises a lime powder bin (10), an alkali liquor stirring tank (9), a lime stirring tank (8), a clean water tank (16), a regeneration tank (17), a sedimentation tank (18) and a circulation tank (19), wherein the alkali liquor stirring tank (9) and the lime stirring tank (8) are respectively provided with a stirrer and a slurry pump.
9. The treatment process of the high-efficiency energy-saving graphitization tail gas treatment system based on any one of the preceding claims is characterized by comprising the following treatment steps:
step 1: when the furnace temperature of the graphitization furnace (20) reaches 800-,
step 2: the air-cooled cooler (2) of the cooling system is connected for cooling through the quick connector,
and step 3: the cooled flue gas enters a multi-pipe cyclone dust collector (3),
and 4, step 4: after dust removal, the mixture enters a three-stage desulfurization purification tower through a draught fan (7), is purified in the three-stage desulfurization purification tower, is directly discharged into the atmosphere after water mist is removed through a spray demister,
and 5: the desulfurization slurry preparation system conveys the desulfurizer slurry to be used to a three-level desulfurization purification tower through a desulfurization pump (15) through a slurry supply system, the saturated desulfurizer is dehydrated by a centrifugal machine (12) and then is recovered and dried, and the extruded clear water flows into the slurry supply system again for recycling.
10. The high-efficiency energy-saving graphitized tail gas treatment process according to claim 9, characterized in that the three-stage desulfurization purification tower is made of PP plates, the plates are cut according to the required length and then subjected to thermoplastic forming, and then are welded by a high-power hot-melt welding machine, a waistband with the same thickness is additionally arranged outside a welding opening of the tower body and then subjected to reinforcement welding, a triangular plate is welded at a connecting part of a bottom plate and the tower body for reinforcement treatment, the pressure of a nozzle in the three-stage desulfurization purification tower is 0.5-3 kg, a demister washing medium is process water, and the liquid level in the three-stage desulfurization purification tower is supplemented and adjusted after washing.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521929A (en) * | 2021-08-20 | 2021-10-22 | 骏化生态工程有限公司 | Method for washing particles in tail gas of compound fertilizer |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09279162A (en) * | 1996-04-17 | 1997-10-28 | Ishikawajima Harima Heavy Ind Co Ltd | Three-stage fluidized bed desulfurizing column |
| KR20060003167A (en) * | 2004-07-05 | 2006-01-10 | 권오준 | Apparatus for purifying flue gas of smelting furnace for lcds' substrate glass using low-temperature activated carbon catalyst and the method thereof |
| CN1864811A (en) * | 2006-04-10 | 2006-11-22 | 广州市天赐三和环保工程有限公司 | Fume desulfurizing process employing multiple circulation and stable double alkali method and apparatus |
| CN101804293A (en) * | 2010-04-06 | 2010-08-18 | 天津晓沃环保工程有限公司 | Flue gas desulfurization method of heating boiler and device thereof |
| CN202224050U (en) * | 2011-09-15 | 2012-05-23 | 常州天兴环保科技有限公司 | Complete equipment for tail gas treatment of graphitization furnace |
| CN102614761A (en) * | 2012-04-17 | 2012-08-01 | 武汉金源环保科技工程设备有限公司 | Glass coating waste gas treatment dry energy-saving process |
| CN103007711A (en) * | 2012-12-06 | 2013-04-03 | 中钢集团新型材料（浙江）有限公司 | Equipment and tail gas treatment method for synchronously treating tail gas of multiple graphitization furnaces |
| CN105327579A (en) * | 2015-10-20 | 2016-02-17 | 西安墙体材料研究设计院 | Purifying method for desulphurization dedusting of tile kiln flue gas |
| CN205796785U (en) * | 2016-07-14 | 2016-12-14 | 中凯化学(大连)有限公司 | A kind of portable VOCs emergent treatment system |
| CN206229183U (en) * | 2016-10-10 | 2017-06-09 | 郑州朴华科技有限公司 | High-efficiency environment friendly dusting and desulfuring system |
| CN110813046A (en) * | 2019-11-29 | 2020-02-21 | 杨昆 | Double-circulation desulfurization device and desulfurization process |
| CN210905610U (en) * | 2019-09-27 | 2020-07-03 | 安阳龙宇投资管理有限公司 | Coal slurry boiler flue gas desulfurization system |
-
2021
- 2021-01-29 CN CN202110124763.7A patent/CN112933905A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09279162A (en) * | 1996-04-17 | 1997-10-28 | Ishikawajima Harima Heavy Ind Co Ltd | Three-stage fluidized bed desulfurizing column |
| KR20060003167A (en) * | 2004-07-05 | 2006-01-10 | 권오준 | Apparatus for purifying flue gas of smelting furnace for lcds' substrate glass using low-temperature activated carbon catalyst and the method thereof |
| CN1864811A (en) * | 2006-04-10 | 2006-11-22 | 广州市天赐三和环保工程有限公司 | Fume desulfurizing process employing multiple circulation and stable double alkali method and apparatus |
| CN101804293A (en) * | 2010-04-06 | 2010-08-18 | 天津晓沃环保工程有限公司 | Flue gas desulfurization method of heating boiler and device thereof |
| CN202224050U (en) * | 2011-09-15 | 2012-05-23 | 常州天兴环保科技有限公司 | Complete equipment for tail gas treatment of graphitization furnace |
| CN102614761A (en) * | 2012-04-17 | 2012-08-01 | 武汉金源环保科技工程设备有限公司 | Glass coating waste gas treatment dry energy-saving process |
| CN103007711A (en) * | 2012-12-06 | 2013-04-03 | 中钢集团新型材料（浙江）有限公司 | Equipment and tail gas treatment method for synchronously treating tail gas of multiple graphitization furnaces |
| CN105327579A (en) * | 2015-10-20 | 2016-02-17 | 西安墙体材料研究设计院 | Purifying method for desulphurization dedusting of tile kiln flue gas |
| CN205796785U (en) * | 2016-07-14 | 2016-12-14 | 中凯化学(大连)有限公司 | A kind of portable VOCs emergent treatment system |
| CN206229183U (en) * | 2016-10-10 | 2017-06-09 | 郑州朴华科技有限公司 | High-efficiency environment friendly dusting and desulfuring system |
| CN210905610U (en) * | 2019-09-27 | 2020-07-03 | 安阳龙宇投资管理有限公司 | Coal slurry boiler flue gas desulfurization system |
| CN110813046A (en) * | 2019-11-29 | 2020-02-21 | 杨昆 | Double-circulation desulfurization device and desulfurization process |
Non-Patent Citations (1)
| Title |
|---|
| 兰州石油机械研究所: "《现代塔器技术》", 30 September 1990, 烃加工出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521929A (en) * | 2021-08-20 | 2021-10-22 | 骏化生态工程有限公司 | Method for washing particles in tail gas of compound fertilizer |
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