Gas mixing device and using method thereof
阅读说明：本技术 一种气体混合装置及其使用方法 (Gas mixing device and using method thereof ) 是由 王海波 刘向东 徐博涛 禚文峰 于 2019-11-20 设计创作，主要内容包括：本发明提供了一种气体混合装置及其使用方法,所述的气体混合装置包括壳体以及纵向设置于壳体顶部的折流板,所述的折流板将壳体的内部空间分为底部连通的混合室和过滤室；所述的过滤室内设置过滤装置。本发明通过设置折流板延长了气体的混合时间,实现了气体混合和杂质沉降的双重目的,另外增设了过滤装置,对气体中的杂质进行二次过滤,尤其针对百菌清生产原料的混合,可以有效减少原料气体中的杂质进下游生产系统,提高了生产效率。(The invention provides a gas mixing device and a use method thereof, wherein the gas mixing device comprises a shell and a baffle plate longitudinally arranged at the top of the shell, and the baffle plate divides the inner space of the shell into a mixing chamber and a filtering chamber, the bottoms of which are communicated; and a filtering device is arranged in the filtering chamber. The invention prolongs the mixing time of the gas by arranging the baffle plate, realizes the dual purposes of gas mixing and impurity settling, is additionally provided with the filtering device to carry out secondary filtering on the impurities in the gas, and particularly aims at the mixing of chlorothalonil production raw materials, can effectively reduce the impurities in the raw material gas from entering a downstream production system, and improves the production efficiency.)
1. The gas mixing device is characterized by comprising a shell and a baffle plate longitudinally arranged at the top of the shell, wherein the baffle plate divides the inner space of the shell into a mixing chamber and a filtering chamber, the bottoms of the mixing chamber and the filtering chamber are communicated;
and a filtering device is arranged in the filtering chamber.
2. The gas mixing device of claim 1, wherein the filter device comprises a faceplate transversely disposed within the filter chamber and at least one filter element secured to the faceplate;
preferably, the pattern plate is provided with at least one pattern plate hole for fixing the filter assembly;
preferably, the filtering component comprises a cage framework fixed at the pattern plate hole and at least one layer of filter screen sleeved outside the cage framework;
preferably, the filter screen is of a bagged structure;
preferably, the filter screen is a stainless steel filter screen;
preferably, 2-3 layers of filter screens are sleeved outside the cage framework;
preferably, the mesh number of the filter screen is 20-40 meshes.
3. The gas mixing device according to claim 1 or 2, wherein a jacket is provided outside the housing;
preferably, a heat-conducting medium is introduced into the jacket;
preferably, the heat conducting medium is heat conducting oil;
preferably, the jacket is made of carbon steel.
4. A gas mixing device according to any one of claims 1-3, wherein at least two gas inlets are provided on the housing corresponding to the mixing chamber;
preferably, the top of the housing corresponding to the filter chamber is provided with an air outlet.
5. A gas mixing device according to any of claims 1-4, characterised in that the gas mixing device is arranged vertically;
preferably, the shell is made of stainless steel;
preferably, the shell sequentially comprises an upper end enclosure, a cylinder and a lower end enclosure from top to bottom;
preferably, the top of the upper seal head corresponding to the mixing chamber is provided with a first air inlet;
preferably, a second air inlet is formed in the outer side surface of the cylinder body corresponding to the mixing chamber;
preferably, the upper end enclosure is an elliptical end enclosure;
preferably, at least two lifting lugs are arranged on the outer side surface of the cylinder body along the circumferential direction;
preferably, the lower end socket is a conical end socket;
preferably, the bottom of the lower end socket is provided with a slag discharge port;
preferably, the lower end socket is detachably connected with the cylinder.
6. The gas mixing device as claimed in any one of claims 1 to 5, wherein the housing further comprises an exhaust cylinder and an exhaust head, the exhaust cylinder is positioned on the top of the upper head corresponding to the filtering chamber and is communicated with the upper head, and the exhaust head is detachably connected with the exhaust cylinder;
preferably, the pattern plate is transversely arranged inside the exhaust cylinder;
preferably, the pattern plate is transversely arranged at a position 3-10 mm below the exhaust seal head;
preferably, the exhaust seal head is an elliptical seal head;
preferably, the top of the exhaust seal head is provided with an exhaust port;
preferably, the exhaust cylinder body and the upper end enclosure are arranged in an integrated structure.
7. A gas mixing device according to any one of claims 1 to 6, wherein the inner diameter of the cylinder is 1000 to 3000 mm;
preferably, the inner diameter of the cylinder body is 2000 mm;
preferably, the height of the cylinder is 3500-4500 mm, and further preferably, the height of the cylinder is 4000 mm;
preferably, the wall thickness of the cylinder body is 10-20 mm, and further preferably, the wall thickness of the cylinder body is 14 mm;
preferably, the inner diameter of the exhaust cylinder body is 1000-1500 mm, and further preferably, the inner diameter of the exhaust cylinder body is 1200 mm;
preferably, the wall thickness of the exhaust cylinder body is 10-20 mm, and further preferably, the wall thickness of the exhaust cylinder body is 14 mm.
8. A method for mixing raw materials for producing chlorothalonil, characterized in that the raw materials for producing chlorothalonil are mixed by using the gas mixing device as defined in any one of claims 1 to 7;
the mixing method specifically comprises the following steps:
introducing chlorothalonil production raw materials into the gas mixing device, introducing the raw materials into the mixing chamber, uniformly mixing, baffling by a baffle plate, entering a filtering chamber, filtering and settling by the filtering device, and discharging the filtered and settled chlorothalonil production raw materials from an exhaust port.
9. The mixing method according to claim 8, wherein the chlorothalonil production feedstock comprises isophthalonitrile, nitrogen and chlorine;
preferably, the mixed gas of the isophthalonitrile and the nitrogen is introduced into the mixing chamber through a first gas inlet, and the chlorine is introduced into the mixing chamber through a second gas inlet.
10. The mixing method according to claim 8 or 9, wherein the filtration and sedimentation process comprises the following steps:
the method comprises the following steps that (I) raw materials for producing chlorothalonil are baffled by a baffling baffle and enter a filtering chamber, and impurities in the raw materials are settled in a dust-gas area, fall into a lower end enclosure and are discharged from a slag discharge port;
(II) the settled chlorothalonil production raw material passes through the flower plate from the dust-gas area to enter the gas purification area, and the filter assembly arranged on the flower plate further filters residual impurities in the chlorothalonil production raw material to regularly clean the impurities in the filter screen.
Technical Field
The invention belongs to the technical field of gas mixing, relates to a gas mixing device and a using method thereof, and particularly relates to a gas mixing device for chlorothalonil production and a using method thereof.
Background
Chlorothalonil is a high-efficiency, low-toxicity, broad-spectrum and low-residue protective bactericide, is widely applied to the prevention and control of fungal diseases in agriculture and forestry, and is very widely applied to economic crops such as vegetables, fruits and the like. According to the Japanese data, chlorothalonil has been reported to produce control effect on fifty-two diseases of over thirty crops. In addition, chlorothalonil has important applications in the field of mildew-proof industry, such as manufacturing mildew-proof coatings and mildew-proof wallpaper, and mildew prevention of electrical appliances, leather, wood and the like. With the continuous expansion of the domestic production scale of chlorothalonil, chlorothalonil has become one of large-tonnage excellent pesticide varieties in the world, and the sales condition in the international market is in a hot sales situation all the time.
CN201825895U discloses a novel chlorothalonil production device, which comprises a nitrogen making machine, a vaporizer, a mixer, a fixed bed, a fluidized bed, a material collector and a dryer; an air inlet is arranged on the nitrogen making machine; a pipeline is arranged between the nitrogen making machine and the vaporizer, and the vaporizer is provided with a meta-xylene feed inlet; a pipeline is arranged between the vaporizer and the mixer, and a chlorine gas feeding pipeline is arranged on the mixer; a pipeline is arranged between the mixer and the fixed bed, and a catalyst inlet is arranged on the fixed bed; a pipeline is arranged between the fixed bed and the fluidized bed, and a chlorine feeding pipeline and a catalyst feeding pipeline are arranged on the fluidized bed; a pipeline is arranged between the fluidized bed and the material receiver; a first conveyor is arranged between the material collector and the dryer; the dryer is provided with a discharge hole.
CN1948278 discloses a method for producing chlorothalonil with low hexachlorobenzene content, which comprises adding isophthalonitrile into a vaporizer for vaporization, wherein the feeding amount is 1 mol/hr; after the isophthalonitrile is completely vaporized, the isophthalonitrile is carried out of the vaporizer by nitrogen, and the flow of the nitrogen is 3-15 times of the feeding flow of the isophthalonitrile; mixing with chlorine, feeding the mixture into a fluidized bed from the bottom of a fluidized bed distribution plate, wherein the chlorine flow is 2-4 times of the feeding amount of isophthalonitrile, and carrying out a first-step reaction in the fluidized bed, wherein the reaction temperature is set to be 220-320 ℃, and the pressure is 0.005-0.15 MPa; mixing the reaction product with chlorine again, wherein the flow of the chlorine is 2-5 times of the feeding amount of the isophthalonitrile, and feeding the mixture into a fixed bed for chlorination; setting the reaction temperature to be 240-340 ℃ and the pressure to be 0.005-0.15 MPa; and (3) feeding the mixed gas output from the fixed bed reactor into a material collector, and condensing and collecting to obtain a chlorothalonil product.
In the production process of chlorothalonil, because raw material gases are insufficiently mixed and iron ion substances are easily formed in the mixing process, the raw material gases enter a fluidized bed reactor to form a coking state, which seriously influences the production quality of the produced product, but the problem of uneven mixing of the raw material gases is not solved in the existing production system of the chlorothalonil.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a gas mixing device and a use method thereof, wherein the gas mixing time is prolonged by arranging a baffle plate, the dual purposes of gas mixing and impurity settling are realized, in addition, a filtering device is additionally arranged for carrying out secondary filtering on impurities in gas, and particularly aiming at the mixing of chlorothalonil production raw materials, the impurities in the raw material gas can be effectively reduced to enter a downstream production system, and the production efficiency is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a gas mixing device, which comprises a housing and a baffle plate longitudinally arranged at the top of the housing, wherein the baffle plate divides the inner space of the housing into a mixing chamber and a filter chamber, the bottom of the mixing chamber is communicated with the bottom of the filter chamber.
And a filtering device is arranged in the filtering chamber.
The invention prolongs the mixing time of the gas by arranging the baffle plate, realizes the dual purposes of gas mixing and impurity settling, is additionally provided with the filtering device to carry out secondary filtering on the impurities in the gas, and particularly aims at the mixing of chlorothalonil production raw materials, can effectively reduce the impurities in the raw material gas from entering a downstream production system, and improves the production efficiency.
In addition, it should be noted that the design concept of the gas mixing device provided by the invention is based on the problem that the start-up time is shortened due to the increase of the bottom pressure of a lower cone caused by coking and blocking of a fluidized bed lower end enclosure distributor in the production link of chlorothalonil, the formation reason of the material and the structural analysis of the original mixer are analyzed by sampling and analyzing the material accumulated in the original mixer, and in order to improve the product quality of the chlorothalonil, a novel mixer meeting the requirements of a chlorothalonil production line is designed, and impurities and solid large particles in raw materials are filtered, settled and separated by additionally arranging a baffle plate and a filtering device, so that the amount of the impurities entering a downstream fluidized bed reactor is reduced. Therefore, the gas mixing device provided by the application is particularly suitable for being used together with a chlorothalonil production system, but the gas mixing device is not only used in a chlorothalonil production process, and other production systems with higher requirements on impurity content are also suitable for the gas mixing device provided by the invention.
As a preferable technical solution of the present invention, the filtering device includes a faceplate transversely disposed in the filtering chamber, and at least one filtering assembly fixed to the faceplate.
Preferably, the pattern plate is provided with at least one pattern plate hole for fixing the filter assembly.
Preferably, the filtering component comprises a cage framework fixed at the pattern plate hole and at least one layer of filter screen sleeved outside the cage framework.
Preferably, the filter screen is of a bagged structure.
Preferably, the filter screen is a stainless steel filter screen.
Preferably, 2-3 layers of filter screens are sleeved outside the cage framework.
Preferably, the mesh number of the filter screen is 20 to 40 meshes, for example, 20 meshes, 21 meshes, 22 meshes, 23 meshes, 24 meshes, 25 meshes, 26 meshes, 27 meshes, 28 meshes, 29 meshes, 30 meshes, 31 meshes, 32 meshes, 33 meshes, 34 meshes, 35 meshes, 36 meshes, 37 meshes, 38 meshes, 39 meshes or 40 meshes, but is not limited to the enumerated values, and other values not enumerated within the numerical range are also applicable.
In a preferred embodiment of the present invention, a jacket is disposed outside the housing.
Preferably, a heat-conducting medium is introduced into the jacket.
Preferably, the heat conducting medium is heat conducting oil.
Preferably, the jacket is made of carbon steel.
As a preferable technical scheme of the invention, at least two air inlets are formed on the shell corresponding to the mixing chamber.
Preferably, the top of the housing corresponding to the filter chamber is provided with an air outlet.
As a preferred embodiment of the present invention, the gas mixing device is arranged vertically.
Preferably, the material of the shell is stainless steel.
Preferably, the shell comprises an upper end enclosure, a cylinder and a lower end enclosure from top to bottom in sequence.
Preferably, the top of the upper seal head corresponding to the mixing chamber is provided with a first air inlet.
Preferably, a second air inlet is formed in the outer side surface of the cylinder body corresponding to the mixing chamber.
Preferably, the upper end enclosure is an elliptical end enclosure.
Preferably, at least two lifting lugs are arranged on the outer side surface of the cylinder body along the circumferential direction.
Preferably, the lower end socket is a conical end socket.
Preferably, the bottom of the lower end socket is provided with a slag discharge port.
Preferably, the lower end socket is detachably connected with the cylinder.
The impurity of settling separation is collected in the awl end of low head, and the field technician can be according to actual conditions regularly from the impurity of row's cinder notch clearance bottom siltation, if the impurity siltation is more to be difficult to discharge smoothly through row's cinder notch, operating personnel can demolish the low head and clear up.
As a preferable technical scheme of the invention, the shell further comprises an exhaust cylinder and an exhaust seal head, the exhaust cylinder is positioned at the top of the upper seal head corresponding to the filter chamber and communicated with the upper seal head, and the exhaust seal head is detachably connected with the exhaust cylinder.
Preferably, the card is transversely arranged inside the exhaust cylinder.
Preferably, the pattern plate is transversely arranged at a position 3-10 mm below the exhaust seal head, for example, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm or 10mm, but the pattern plate is not limited to the values listed, and other values not listed in the range of the values are also applicable.
Preferably, the exhaust seal head is an elliptical seal head.
Preferably, the top of the exhaust seal head is provided with an exhaust port.
Preferably, the exhaust cylinder body and the upper end enclosure are arranged in an integrated structure.
In the invention, the exhaust cylinder and the exhaust seal head are additionally arranged at the upper seal head, so that an operator can conveniently and periodically check the use state of the filter assembly arranged on the pattern plate, and the pattern plate is positioned at the joint of the exhaust cylinder and the exhaust seal head, so that the operator can periodically open the upper seal head to check the state of the filter screen according to the working condition of the production cycle to determine cleaning or replacement.
In a preferred embodiment of the present invention, the inner diameter of the cylindrical body is 1000 to 3000mm, and may be, for example, 1000mm, 1100mm, 1200mm, 1300mm, 1400mm, 1500mm, 1600mm, 1700mm, 1800mm, 1900mm, 2000mm, 2100mm, 2200mm, 2300mm, 2400mm, 2500mm, 2600mm, 2700mm, 2800mm, 2900mm, or 3000mm, but is not limited to the above-mentioned values, and other values not listed in the above-mentioned range are also applicable.
Preferably, the inner diameter of the cylinder is 2000 mm.
Preferably, the barrel height is 3500mm to 4500mm, such as 3500mm, 3600mm, 3700mm, 3800mm, 3900mm, 4000mm, 4100mm, 4200mm, 4300mm, 4400mm or 4500mm, but not limited to the recited values, and other values not recited in the range of values are also applicable; further preferably, the height of the cylinder is 4000 mm.
Preferably, the cylinder wall thickness is 10-20 mm, for example, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm, but not limited to the values listed, and other values not listed in the range of the values are also applicable; further preferably, the wall thickness of the cylinder body is 14 mm.
Preferably, the inner diameter of the exhaust cylinder is 1000-1500 mm, such as 1000mm, 1100mm, 1200mm, 1300mm, 1400mm or 1500mm, but not limited to the values listed, and other values not listed in the range of the values are also applicable; further preferably, the inner diameter of the exhaust cylinder body is 1200 mm.
Preferably, the wall thickness of the exhaust cylinder is 10 to 20mm, for example, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm, but not limited to the values listed, and other values not listed in the range of the values are also applicable; further preferably, the wall thickness of the exhaust cylinder body is 14 mm.
It should be noted that various design dimensions of the gas mixing device provided by the present invention need to be reasonably designed by technicians in the field according to actual production and use fields, and whether the wall thickness, the height and the inner diameter of the cylinder body meet mechanical indexes is checked, and the present invention does not have special requirements and specific limitations for this.
In a second aspect, the invention provides a method for mixing raw materials for producing chlorothalonil, wherein the gas mixing device of the first aspect is adopted to mix the raw materials for producing chlorothalonil.
The mixing method specifically comprises the following steps:
introducing chlorothalonil production raw materials into the gas mixing device, introducing the raw materials into the mixing chamber, uniformly mixing, baffling by a baffle plate, entering a filtering chamber, filtering and settling by the filtering device, and discharging the filtered and settled chlorothalonil production raw materials from an exhaust port.
As a preferred technical scheme of the invention, the chlorothalonil production raw material comprises isophthalonitrile, nitrogen and chlorine.
Preferably, the mixed gas of the isophthalonitrile and the nitrogen is introduced into the mixing chamber through a first gas inlet, and the chlorine is introduced into the mixing chamber through a second gas inlet.
As a preferred technical scheme of the invention, the filtration and sedimentation process specifically comprises the following steps:
the method comprises the following steps that (I) raw materials for producing chlorothalonil are baffled by a baffling baffle and enter a filtering chamber, and impurities in the raw materials are settled in a dust-gas area, fall into a lower end enclosure and are discharged from a slag discharge port;
(II) the settled chlorothalonil production raw material passes through the flower plate from the dust-gas area to enter the gas purification area, and the filter assembly arranged on the flower plate further filters residual impurities in the chlorothalonil production raw material to regularly clean the impurities in the filter screen.
Illustratively, the invention provides a method for mixing chlorothalonil production raw materials by using the gas mixing device, which specifically comprises the following steps:
(1) the mist of isophthalonitrile and nitrogen gets into the mixing chamber by first air inlet, and the chlorine after the heating gets into the mixing chamber by the second air inlet, and wherein, the mixing ratio of isophthalonitrile and nitrogen is 1.3: 1; the flow rate of the mixed gas of the isophthalonitrile and the nitrogen is 1800-2400 kg/h, the introducing temperature of the chlorine is 150-240 ℃, and the flow rate of the chlorine is 500-1500 kg/h. After the isophthalonitrile, the nitrogen and the chlorine are fully mixed in the mixing chamber, the mixture is baffled by a baffling baffle and enters a filter chamber;
(2) isophthalonitrile, nitrogen gas and chlorine three's mist at first gets into the dirt gas zone, accomplish the nature of solid large granule and impurity and subside in the mist in the dirt gas zone, the solid large granule and the impurity that subside fall into in the low head, and regularly discharge through the slag notch, mist after the nature subsides passes the card by the dirt gas zone and gets into the gas purification district, the filter assembly who sets up on the card carries out secondary filter to the impurity in the mist, the impurity that strains during the collection that gets into the filter screen, mist after the secondary filter gets into low reaches chlorothalonil production processes through the gas vent discharge that sets up on the exhaust head.
The recitation of numerical ranges herein includes not only the above-recited numerical values, but also any numerical values between non-recited numerical ranges, and is not intended to be exhaustive or to limit the invention to the precise numerical values encompassed within the range for brevity and clarity.
The system refers to an equipment system, or a production equipment.
Compared with the prior art, the invention has the beneficial effects that:
the invention prolongs the mixing time of the gas by arranging the baffle plate, realizes the dual purposes of gas mixing and impurity settling, is additionally provided with the filtering device to carry out secondary filtering on the impurities in the gas, and particularly aims at the mixing of chlorothalonil production raw materials, can effectively reduce the impurities in the raw material gas from entering a downstream production system, and improves the production efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a gas mixing device according to an embodiment of the present invention.
Wherein, 1, an upper end enclosure; 2-a cylinder body; 3, lower end enclosure; 4-baffle plate; 5-a mixing chamber; 6-filtering chamber; 7-jacket; 8-a first air inlet; 9-a second air inlet; 10-an exhaust port; 11-a slag discharge port; 12-an exhaust cylinder; 13-an exhaust seal head; 14-lifting lug.
Detailed Description
It is to be understood that in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
In one embodiment, the invention provides a gas mixing device, as shown in fig. 1, comprising a vertically arranged housing and a baffle plate 4 longitudinally arranged at the top of the housing, wherein the baffle plate 4 divides the inner space of the housing into a mixing chamber 5 and a filtering chamber 6 which are communicated with each other at the bottom, and a filtering device is arranged in the filtering chamber 6.
The filtering device comprises a pattern plate transversely arranged in the filtering chamber 6 and at least one filtering component fixed on the pattern plate, wherein at least one pattern plate hole used for fixing the filtering component is formed in the pattern plate, the filtering component comprises a cage framework fixed at the pattern plate hole and at least one layer of filtering net sleeved outside the cage framework, the filtering net is a bagged filtering net made of stainless steel, 2-3 layers of filtering nets are optionally sleeved outside the cage framework, and the number of the filtering nets can be selected to be 20-40 meshes.
The shell is made of stainless steel, a carbon steel jacket 7 is arranged on the outer side of the shell, and heat conduction oil is introduced into the jacket 7. The shell comprises an upper end enclosure 1, a barrel body 2 and a lower end enclosure 3 from top to bottom in sequence, wherein the upper end enclosure 1 is an elliptical end enclosure, the lower end enclosure 3 is a conical end enclosure, and the lower end enclosure 3 is detachably connected with the barrel body 2. A first air inlet 8 is formed in the top of an upper end enclosure 1 corresponding to the mixing chamber 5, a second air inlet 9 is formed in the outer side surface of a barrel 2 corresponding to the mixing chamber 5, at least two lifting
In another embodiment, the invention provides a method for mixing raw materials for producing chlorothalonil, which comprises the steps of mixing the raw materials for producing chlorothalonil by using the gas mixing device provided by the embodiment;
the mixing method specifically comprises the following steps:
introducing chlorothalonil production raw materials into the gas mixing device, wherein the chlorothalonil production raw materials comprise isophthalonitrile and nitrogen, the raw materials are introduced into the mixing chamber 5, mixed uniformly and then enter the filtering chamber 6 through the baffle plate 4 to be filtered and settled, and the chlorothalonil production raw materials after filtering and settling are discharged from the
Wherein, the filtration and sedimentation process specifically comprises the following steps:
the method comprises the following steps that (I) raw materials for producing chlorothalonil are baffled by a baffling baffle and enter a filtering chamber 6, and impurities in the raw materials are settled in a dust-gas area, fall into a lower end enclosure 3 and are discharged from a
(II) the settled chlorothalonil production raw material passes through the flower plate from the dust-gas area to enter the gas purification area, and the filter assembly arranged on the flower plate further filters residual impurities in the chlorothalonil production raw material to regularly clean the impurities in the filter screen.
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