A device for capturing tetrachloroisophthalonitrile synthesis gas, a method for using the same and an application thereof

Abstract

The application provides a trapping device for tetrachloroisophthalonitrile synthesis gas, a use method and application thereof. The trapping device comprises a trapping device body and a top head arranged above the trapping device body. The trapping device body comprises at least two groups of trapping assemblies which are arranged at intervals and are independent of each other along the length direction of the trapping device body. Each group of trapping assemblies comprises at least one trapping shell which is arranged side by side along the width direction of the trapping device body. A longitudinal baffle is arranged inside the trapping shell. The baffle is parallel to the width direction of the trapping device body. The baffle divides the inside of the trapping shell into a bottom-communicating approach trapping chamber and a return trapping chamber. A jacket is arranged outside the trapping device body. The trapping shells are arranged in a matrix form in the jacket. Cooling medium is introduced into the jacket. The top head is used for connecting the top portions of two adjacent groups of trapping assemblies. A longitudinal partition plate is arranged in the top head and is opposite to the position of the baffle. An air inlet and an air outlet are arranged on the two sides of the short side of the top head.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of desublimation capture, and relates to a capture device, a use method and application thereof, in particular to a capture device for tetrachloroisophthalonitrile synthesis gas, a use method and application thereof. BACKGROUND

[0002] Tetrachloroisophthalonitrile is a high-efficiency, low-toxicity and broad-spectrum protective fungicide, which is a contact agent and is mainly used for preventing and treating various fungal diseases. Since the 1960s, tetrachloroisophthalonitrile has been widely used as a fungicide, and is mainly used for preventing and treating rust, anthracnose, powdery mildew and downy mildew on fruit trees and vegetables, so as to prevent plants from being damaged by fungi. Tetrachloroisophthalonitrile is also used for sterilization of golf courses, lawns and ornamental plants, and for the preservation treatment of some trees and paintings.

[0003] At present, the main method for synthesizing tetrachloroisophthalonitrile is the direct chlorination method of isophthalonitrile. After isophthalonitrile is melted, it is sent into a vaporizer for vaporization or directly atomized by a nozzle with part of the gas stream (N2) to enter a reactor. Chlorine gas is mixed with gaseous isophthalonitrile after being dried and preheated, and nitrogen is used as a diluent gas for isophthalonitrile vaporization or atomization and for adjusting the concentration of reactants. The reactor adopts a fluidized bed or other forms. After reaction, the gas is sent into a capture device, and the benomyl desublimates and is continuously sent out as a product, with a yield of 90%. The tail gas mainly contains chlorine, hydrogen chloride and nitrogen, which can be partially recycled or completely sent to a tail gas recovery treatment system.

[0004] The intermittent cooling type capture, also known as the square box type capture, is a capture method commonly used by small tetrachloroisophthalonitrile production plants in China at present. The mixed reaction gas from the fluidized bed reactor is filtered through a filter and then enters a fixed bed for further reaction. The mixed reaction gas is then sent into a square box type capture device through a jacketed heat conduction oil heat preservation pipe. The capture device is provided with an outer jacket and is connected with a circulating cooling water pipe to cool the mixed reaction gas. The crystallized material desublimates and freely settles in the capture device. The tetrachloroisophthalonitrile is sent to a crushing device through a product conveying system, and the finished product tetrachloroisophthalonitrile is obtained after crushing. Since the desublimation and crystallization process of tetrachloroisophthalonitrile is not a constant temperature process, it is difficult to complete the capture of all the materials in one capture device. Therefore, several square boxes are connected in series to operate. At present, the most commonly used method is the box series operation, until the content of tetrachloroisophthalonitrile in the mixed reaction gas reaches the economic lower limit of recovery. An induced draft fan is arranged at the outlet of the tail gas treatment device to ensure that the entire capture system is in a slightly negative pressure state, so that the leakage of toxic and harmful reaction gas will not occur during discharging.

[0005] However, the commonly used capture method needs to use multiple capture devices in series, which cannot guarantee the capture efficiency of tetrachloroisophthalonitrile and occupies a large area. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide a device for capturing tetrachloroisophthalonitrile synthesis gas, its use method and application, which further improves the capture efficiency of tetrachloroisophthalonitrile and further reduces the floor area of the equipment compared with the prior art.

[0007] To achieve this purpose, the present application adopts the following technical solutions:

[0008] In the first aspect, the present application provides a device for capturing tetrachloroisophthalonitrile synthesis gas, which comprises a capturing device body and a top head arranged above it.

[0009] The capturing device body comprises at least two groups of capturing assemblies arranged at intervals and independent of each other along the length direction thereof, each group of capturing assemblies comprises at least one capturing shell arranged side by side along the width direction of the capturing device body, the capturing shell is internally provided with a longitudinal baffle, the baffle is parallel to the width direction of the capturing device body, and the baffle divides the capturing shell into a bottom-communicating approach capture chamber and a return capture chamber; the capturing device body is provided with a jacket on the outside, the capturing shells are arranged in a matrix in the jacket, and cooling medium is introduced into the jacket.

[0010] The top head is used to communicate the top of the two adjacent groups of capturing assemblies, the top head is internally provided with a longitudinal partition plate opposite to the position of the baffle, and the short sides of the top head are respectively provided with an air inlet and an air outlet.

[0011] The capturing device provided by the present application realizes sufficient heat exchange of synthesis gas in a limited space by arranging a baffle in the interior of a single capturing shell and arranging and combining a plurality of single capturing shells in a matrix to form an integrated capturing device, which further reduces the floor area of the equipment on the basis of ensuring or even increasing the heat exchange area compared with the traditional series connection of multiple capturing devices, so that the capture efficiency of tetrachloroisophthalonitrile is further improved.

[0012] It should be noted that although the present application limits the use scenario of the capturing device, it does not mean that the device can only be used for desublimation capture of tetrachloroisophthalonitrile synthesis gas, other synthesis gases similar or similar to tetrachloroisophthalonitrile in physicochemical properties can also use the capturing device provided by the present application for desublimation capture.

[0013] In addition, it can be understood that the present application only limits the arrangement of the trapping shells in a matrix form, and does not limit the arrangement number and the specific arrangement manner of the trapping shells. As to the arrangement number, the person skilled in the art needs to make a reasonable selection according to the actual production needs and the flow of the synthesis gas to be condensed. As to the matrix arrangement in any form of 2x2, 2x3, 3x2, 3x3, 3x4, 4x3, etc., the person skilled in the art also needs to make a reasonable selection according to the actual production needs. The present application provides an arrangement standard of the number of trapping assemblies and the number of trapping shells that can be referred to: (1) when the flow of the synthesis gas to be condensed is large, the number of trapping shells in the same trapping assembly can be appropriately increased, because the synthesis gas enters the top head from the gas inlet and then enters different trapping shells in the same trapping assembly for condensation, so that more trapping shells need to be arranged in the same trapping assembly to cooperate with the immediate treatment of the large-flow synthesis gas; (2) when the content of tetrachloroisophthalonitrile in the synthesis gas is high, the number of trapping assemblies needs to be increased to increase the number of turns of the synthesis gas in the trapping device, so that tetrachloroisophthalonitrile can be fully condensed.

[0014] As a preferred technical solution of the present application, the trapping device body includes two groups of trapping assemblies arranged at intervals and independent of each other along the length direction of the trapping device body.

[0015] Preferably, each group of trapping assemblies includes three trapping shells arranged side by side along the width direction of the trapping device body.

[0016] Preferably, the trapping shells are arranged at intervals in the jacket in a 2x3 matrix form.

[0017] As a preferred technical solution of the present application, the interval between the two adjacent groups of trapping assemblies is 100-300 mm, for example, it can be 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm, 210 mm, 220 mm, 230 mm, 240 mm, 250 mm, 260 mm, 270 mm, 280 mm, 290 mm or 300 mm, but is not limited to the listed values, and other values not listed in the value range are also applicable.

[0018] Preferably, the interval between the trapping shells in the same group of trapping assemblies is 50-150 mm, for example, it can be 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm or 150 mm, but is not limited to the listed values, and other values not listed in the value range are also applicable.

[0019] Preferably, the trapping housing is a cuboid structure.

[0020] Preferably, the length of the trapping housing is 3000-6000 mm, for example, it can be 3000 mm, 3100 mm, 3200 mm, 3300 mm, 3400 mm, 3500 mm, 3600 mm, 3700 mm, 3800 mm, 3900 mm, 4000 mm, 4100 mm, 4200 mm, 4300 mm, 4400 mm, 4500 mm, 4600 mm, 4700 mm, 4800 mm, 4900 mm, 5000 mm, 5100 mm, 5200 mm, 5300 mm, 5400 mm, 5500 mm, 5600 mm, 5700 mm, 5800 mm, 5900 mm or 6000 mm, but not only limited to the listed values, other values not listed in the range are also applicable.

[0021] Preferably, the width of the trapping housing is 3000-6000 mm, for example, it can be 3000 mm, 3100 mm, 3200 mm, 3300 mm, 3400 mm, 3500 mm, 3600 mm, 3700 mm, 3800 mm, 3900 mm, 4000 mm, 4100 mm, 4200 mm, 4300 mm, 4400 mm, 4500 mm, 4600 mm, 4700 mm, 4800 mm, 4900 mm, 5000 mm, 5100 mm, 5200 mm, 5300 mm, 5400 mm, 5500 mm, 5600 mm, 5700 mm, 5800 mm, 5900 mm or 6000 mm, but not only limited to the listed values, other values not listed in the range are also applicable.

[0022] Preferably, the height of the trapping housing is 6000-12000 mm, for example, it can be 6000 mm, 6500 mm, 7000 mm, 7500 mm, 8000 mm, 8500 mm, 9000 mm, 9500 mm, 10000 mm, 10500 mm, 11000 mm, 11500 mm or 12000 mm, but not only limited to the listed values, other values not listed in the range are also applicable.

[0023] Preferably, the wall thickness of the trapping housing is ≥10 mm, for example, it can be 10 mm, 12 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm or 30 mm, but not only limited to the listed values, other values not listed in the range are also applicable.

[0024] Preferably, the material of the capture shell is stainless steel, and more preferably, the material of the capture shell is 304 stainless steel.

[0025] Preferably, the baffle is arranged at the top of the capture shell, and a vertical distance of 200-500 mm, such as 200 mm, 250 mm, 300 mm, 350 mm, 400 mm, 450 mm or 500 mm, is reserved between the bottom edge of the baffle and the bottom of the capture shell, but the values listed are not the only ones applicable, and other values not listed within the range are also applicable.

[0026] Preferably, the thickness of the baffle is 20-30 mm, such as 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm or 30 mm, but the values listed are not the only ones applicable, and other values not listed within the range are also applicable.

[0027] Preferably, the material of the baffle is stainless steel, and more preferably, the material of the baffle is 304 stainless steel.

[0028] As a preferred technical solution of the present application, the wall thickness of the top head is ≥8 mm, such as 8 mm, 10 mm, 12 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm or 30 mm, but the values listed are not the only ones applicable, and other values not listed within the range are also applicable.

[0029] Preferably, the material of the top head is stainless steel, and more preferably, the material of the top head is 304 stainless steel.

[0030] Preferably, the thickness of the longitudinal partition plate is 20-30 mm, such as 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm or 30 mm, but the values listed are not the only ones applicable, and other values not listed within the range are also applicable.

[0031] Preferably, the material of the longitudinal partition plate is stainless steel, and more preferably, the material of the longitudinal partition plate is 304 stainless steel.

[0032] As a preferred technical solution of the present application, two manholes are provided at the top of the capture shell, one of which is located at the top of the capture shell where the capture chamber is located, and the other is located at the top of the capture shell where the return capture chamber is located.

[0033] Preferably, the material of the manhole is stainless steel, and more preferably, the material of the manhole is 304 stainless steel.

[0034] Preferably, the manhole diameter is 500-1000 mm, for example, it can be 500 mm, 550 mm, 600 mm, 650 mm, 700 mm, 750 mm, 800 mm, 850 mm, 900 mm, 950 mm or 1000 mm, but not only limited to the listed values, other values not listed in the range are also applicable.

[0035] Preferably, the distance between the centers of the two manholes on the same capture shell is 1000-1500 mm, for example, it can be 1000 mm, 1050 mm, 1100 mm, 1150 mm, 1200 mm, 1250 mm, 1300 mm, 1350 mm, 1400 mm, 1450 mm or 1500 mm, but not only limited to the listed values, other values not listed in the range are also applicable.

[0036] As a preferred technical solution of the present application, the bottom of the capture assembly is provided with a material collecting cavity with an inverted conical structure.

[0037] Preferably, the material collecting cavity is an inverted quadrangular pyramid.

[0038] Preferably, the material collecting cavity is made of stainless steel, and further preferably, the material collecting cavity is made of 304 stainless steel.

[0039] Preferably, the base side length of the material collecting cavity is 3000-6000 mm, for example, it can be 3000 mm, 3100 mm, 3200 mm, 3300 mm, 3400 mm, 3500 mm, 3600 mm, 3700 mm, 3800 mm, 3900 mm, 4000 mm, 4100 mm, 4200 mm, 4300 mm, 4400 mm, 4500 mm, 4600 mm, 4700 mm, 4800 mm, 4900 mm, 5000 mm, 5100 mm, 5200 mm, 5300 mm, 5400 mm, 5500 mm, 5600 mm, 5700 mm, 5800 mm, 5900 mm or 6000 mm, but not only limited to the listed values, other values not listed in the range are also applicable.

[0040] Preferably, the bottom discharge port of the material collecting cavity is connected to a conveying device.

[0041] Preferably, the conveying device is a spiral conveying device.

[0042] As a preferred technical solution of the present application, the jacket is provided with an air inlet and an air outlet, and the air inlet is connected to an air fan.

[0043] In the present application, the air intake of the fan is controlled by the DCS automatic control system, and the trapping temperature in the trapping device is adjusted by the opening of the air volume regulating valve, so as to realize automatic control.

[0044] In the present application, the cooling medium of the trapping device uses air cooling instead of circulating water cooling, which greatly reduces the possibility of hydrogen chloride gas becoming hydrochloric acid due to the leakage of the trapping device jacket circulating water, thereby effectively reducing the corrosion and perforation of the trapping device, reducing the leakage of the toxic reaction gas containing chlorine gas caused by the corrosion of the trapping device, further ensuring the personal safety of the production site operators and the environment. Compared with the traditional water-cooled trapping device, the air-cooled trapping device used for trapping synthesis gas effectively guarantees the quality of the captured tetrachloroisophthalonitrile, and reduces the number of unqualified products.

[0045] Preferably, a transverse partition plate is arranged in the jacket.

[0046] Preferably, at least one lifting lug is arranged at the side wall of the jacket.

[0047] Preferably, a group of opposite lifting lugs are arranged on the outer wall of the short side of the jacket.

[0048] Preferably, two groups of opposite lifting lugs are arranged on the outer wall of the long side of the jacket.

[0049] In a second aspect, the present application provides a use method of the trapping device as described in the first aspect, and the use method comprises:

[0050] (I) cooling medium is introduced into the jacket, and tetrachloroisophthalonitrile synthesis gas enters the top head from the gas inlet, and the longitudinal partition plate guides the synthesis gas into the lower trapping assembly;

[0051] (II) the synthesis gas flows through the forward trapping chamber and the return trapping chamber in turn under the action of the baffle, and the synthesis gas indirectly exchanges heat with the cooling medium in the jacket during the flow process, and the tetrachloroisophthalonitrile sublimes and separates out, and the synthesis gas passes through the top head from the top of the return trapping chamber and enters the next trapping assembly;

[0052] (III) the synthesis gas is folded back and forth in the trapping device body in a snake shape, and after traversing all trapping assemblies step by step, it is discharged from the gas outlet through the top head.

[0053] As a preferred technical solution of the present application, in step (I), the cooling medium is cold air.

[0054] Preferably, in step (II), the trapping temperature is controlled at ≤200℃, for example, it can be 100℃, 110℃, 120℃, 130℃, 140℃, 150℃, 160℃, 170℃, 180℃, 190℃ or 200℃, but not limited to the listed values, other values in the range are also applicable.

[0055] Preferably, the sublimed tetrachloroisophthalonitrile falls into the collection chamber and is continuously sent out through the spiral discharge device.

[0056] In a third aspect, the present application provides an application of the trapping device as described in the first aspect, which is used for trapping tetrachloroisophthalonitrile in tetrachloroisophthalonitrile synthesis gas.

[0057] The system refers to a device system, a device system or a production device.

[0058] Compared with the prior art, the present application has the following beneficial effects:

[0059] (1) The trapping device provided by the present application has the following advantages: when in use, the synthesis gas enters the trapping device from the gas inlet of the trapping device, is cooled by jacket air cooling and sublimed, the solid tetrachloroisophthalonitrile falls into the collection cavity at the lower part of the trapping shell, the synthesis gas that is not trapped is deflected by the deflection baffle in the trapping shell, enters the return trapping chamber from the lower part of the trapping shell, is further trapped, and more than 90% of the tetrachloroisophthalonitrile is trapped, and the remaining synthesis gas enters the next trapping shell to repeat the next level of trapping.

[0060] (2) The present application further improves the trapping efficiency of tetrachloroisophthalonitrile by setting the deflection baffle, and the cooling medium of the trapping device uses air cooling instead of circulating water cooling, which greatly reduces the possibility of hydrogen chloride gas becoming hydrochloric acid due to leakage of the circulating water in the jacket of the trapping device, thereby effectively reducing the corrosion and perforation of the trapping device, reducing the leakage of toxic reaction gas containing chlorine due to corrosion of the trapping device, further ensuring the personal safety of the production site operators and the environment, and effectively ensuring the quality of tetrachloroisophthalonitrile, reducing the number of unqualified products, and having great advantages compared with traditional trapping devices. BRIEF DESCRIPTION OF DRAWINGS

[0061] Figure 1 The front view structural diagram of the trapping device provided for one specific embodiment of the present application;

[0062] Among them, the dashed line is the flow direction of the synthesis gas in the trapping device;

[0063] Figure 2 The top view structural diagram of the trapping device provided for one specific embodiment of the present application.

[0064] Wherein, 1-capture device body; 2-top head; 3-capture shell; 4-jacket; 5-longitudinal partition; 6-baffle; 7-inlet; 8-outlet; 9-manhole; 10-lifting lug; 11-receiving cavity. DETAILED DESCRIPTION

[0065] It should be understood that, in the description of the present application, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0066] It should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood through specific circumstances.

[0067] The technical solutions of the present application will be further illustrated by specific embodiments in conjunction with the drawings.

[0068] Example 1

[0069] The present embodiment provides a kind of for tetrachloroisophthalonitrile synthesis gas capture device, the capture device as shown in Figure 1 It includes capture device body 1 and top head 2 arranged above it.

[0070] The capture device body 1 includes two groups of capture assemblies arranged at intervals and independent of each other along its length direction, the two groups of capture assemblies are spaced apart by 100 mm, each group of capture assemblies includes three capture shells 3 arranged side by side along the width direction of the capture device body 1, the capture shells 3 are spaced apart by 50 mm, the capture shell 3 is a cuboid structure, the length is 3000 mm, the width is 3000 mm, the height is 6000 mm, the wall thickness is 10 mm, and the material of the capture shell 3 is 304 stainless steel.

[0071] The upper part of the trapping shell 3 is provided with a longitudinal baffle 6, which is parallel to the width direction of the trapping device body 1, and a vertical distance of 200 mm is reserved between the bottom edge of the baffle 6 and the bottom of the trapping shell 3. The baffle 6 divides the trapping shell 3 into a bottom-communicating outgoing trapping chamber and a bottom-communicating returning trapping chamber. The thickness of the baffle 6 is 20 mm, and the material of the baffle 6 is 304 stainless steel.

[0072] Two manholes 9 are formed in the top of the trapping shell 3, one of which is located in the top of the trapping shell 3 where the outgoing trapping chamber is located, and the other is located in the top of the trapping shell 3 where the returning trapping chamber is located. The material of the manhole 9 is 304 stainless steel, the diameter of the manhole 9 is 500 mm, and the center distance of the two manholes 9 formed in the same trapping shell 3 is 1000 mm.

[0073] A jacket 4 is arranged outside the trapping device body 1, and the trapping shells 3 are arranged in the jacket 4 in a 2x3 matrix. An air inlet and an air outlet are formed in the jacket 4, and an air fan is connected to the air inlet to introduce cold air into the jacket 4 to exchange heat with the synthesis gas in the trapping shell 3. A transverse partition is arranged in the jacket 4, and a group of positionally opposite lifting lugs 10 are arranged on the outer walls of the short sides of the jacket 4, and two groups of positionally opposite lifting lugs 10 are arranged on the outer walls of the long sides of the jacket 4.

[0074] The top head 2 is used to communicate the tops of two adjacent groups of trapping assemblies, and the wall thickness of the top head 2 is 8 mm, and the material is 304 stainless steel. A longitudinal partition 5 is arranged in the top head 2, which is positionally opposite to the baffle 6, and the thickness of the longitudinal partition 5 is 20 mm, and the material of the longitudinal partition 5 is 304 stainless steel. An air inlet 7 and an air outlet 8 are formed in the short sides of the top head 2.

[0075] A material collecting cavity 11 with an inverted conical structure is arranged at the bottom of the trapping assembly, and the material collecting cavity 11 is an inverted quadrangular pyramid. The material of the material collecting cavity 11 is 304 stainless steel, and the edge length of the conical bottom surface of the material collecting cavity 11 is 3000 mm. The bottom discharge port of the material collecting cavity 11 is connected to a screw conveying device.

[0076] The above trapping device is used to trap tetrachloroisophthalonitrile synthesis gas, and the trapping temperature is controlled at 200℃ by adjusting the flow of cold air. The trapping rate of tetrachloroisophthalonitrile reaches 92%.

[0077] Example 2

[0078] The embodiment provides a trapping device for tetrachloroisophthalonitrile synthesis gas, as shown in Figure 1 The trapping device comprises a trapping device body 1 and a top head 2 arranged above the trapping device body 1.

[0079] The capture device body 1 includes three groups of capture assemblies arranged at intervals and independently along the length direction, two groups of capture assemblies are arranged at intervals of 150mm, each group of capture assemblies includes three capture housings 3 arranged side by side along the width direction of the capture device body 1, and the distance between each capture housing 3 is 70mm, the capture housing 3 is a cuboid structure with a length of 4000mm, a width of 4000mm, a height of 8000mm and a wall thickness of 12mm, and the material of the capture housing 3 is 304 stainless steel.

[0080] A longitudinal baffle 6 is arranged at the top of the capture housing 3, the baffle 6 is parallel to the width direction of the capture device body 1, and the distance between the bottom edge of the baffle 6 and the bottom of the capture housing 3 is 300mm, the baffle 6 divides the capture housing 3 into a bottom-communicating capture chamber and a return capture chamber, the thickness of the baffle 6 is 23mm, and the material of the baffle 6 is 304 stainless steel.

[0081] Two manholes 9 are arranged at the top of the capture housing 3, one manhole 9 is arranged at the top of the capture housing 3 where the capture chamber is located, and the other manhole 9 is arranged at the top of the capture housing 3 where the return capture chamber is located, the material of the manhole 9 is 304 stainless steel, the diameter of the manhole 9 is 600mm, and the distance between the centers of the two manholes 9 arranged on the same capture housing 3 is 1100mm.

[0082] A jacket 4 is arranged outside the capture device body 1, the capture housings 3 are arranged in a 3x3 matrix in the jacket 4, air inlets and air outlets are arranged on the jacket 4, a fan is connected to the air inlet to introduce cold air into the jacket 4 to exchange heat with the synthesis gas in the capture housing 3, a transverse partition is arranged in the jacket 4, a group of opposite lifting lugs 10 are arranged on the outer wall of the short side of the jacket 4, and two groups of opposite lifting lugs 10 are arranged on the outer wall of the long side of the jacket 4.

[0083] The top head 2 is used to connect the top of two adjacent groups of capture assemblies, the wall thickness of the top head 2 is 10mm, and the material is 304 stainless steel. A longitudinal partition 5 opposite to the baffle 6 is arranged in the top head 2, the thickness of the longitudinal partition 5 is 23mm, and the material of the longitudinal partition 5 is 304 stainless steel. An air inlet 7 and an air outlet 8 are arranged on the short side of the top head 2.

[0084] A collection cavity 11 with an inverted conical structure is arranged at the bottom of the capture assembly, and the collection cavity 11 is an inverted quadrangular pyramid. The material of the collection cavity 11 is 304 stainless steel, and the side length of the bottom surface of the collection cavity 11 is 4000mm. The bottom discharge port of the collection cavity 11 is connected to a screw conveying device.

[0085] The above-mentioned collection device was used to collect the syngas of tetrachloroisophthalonitrile. By adjusting the flow rate of cold air, the collection temperature was controlled at 180°C, and the collection rate of tetrachloroisophthalonitrile reached 94%.

[0086] Example 3

[0087] This embodiment provides a collection device for the synthesis gas of tetrachloroisophthalonitrile, the collection device being as follows: Figure 1 As shown, it includes a collection device body 1 and a top cap 2 disposed above it.

[0088] The main body 1 of the trapping device includes three sets of trapping components that are spaced apart and independent of each other along its length. The two sets of trapping components are 200mm apart. Each set of trapping components includes two trapping shells 3 arranged side by side along the width of the main body 1 of the trapping device. The trapping shells 3 are spaced apart by 100mm. The trapping shells 3 are cuboid structures with a length of 4500mm, a width of 4500mm, a height of 9000mm, and a wall thickness of 16mm. The trapping shells 3 are made of 304 stainless steel.

[0089] A longitudinal baffle 6 is provided on the upper part of the inside of the collection housing 3. The baffle 6 is parallel to the width direction of the collection device body 1. A vertical distance of 350mm is maintained between the bottom edge of the baffle 6 and the bottom of the collection housing 3. The baffle 6 divides the inside of the collection housing 3 into an outgoing collection chamber and an ingoing collection chamber that are connected at the bottom. The baffle 6 is 25mm thick and is made of 304 stainless steel.

[0090] Two manholes 9 are provided on the top of the capture housing 3. One manhole 9 is located on the top of the capture housing 3 containing the outbound capture chamber, and the other manhole 9 is located on the top of the capture housing 3 containing the return capture chamber. The manholes 9 are made of 304 stainless steel and have a diameter of 700mm. The center distance between the two manholes 9 on the same capture housing 3 is 1300mm.

[0091] The main body 1 of the collection device is provided with a jacket 4 on the outside. The collection shell 3 is arranged in a 3×2 matrix at intervals in the jacket 4. The jacket 4 is provided with an air inlet and an air outlet. The air inlet is connected to a fan. The fan introduces cold air into the jacket 4 to exchange heat with the synthesis gas in the collection shell 3. The jacket 4 is provided with a transverse partition. A set of lifting lugs 10 with opposite positions is provided on the outer walls of the short side of the jacket 4. Two sets of lifting lugs 10 with opposite positions are provided on the outer walls of the long side of the jacket 4.

[0092] The top head 2 is used for connecting the top of two adjacent groups of trapping assemblies, the wall thickness of the top head 2 is 12 mm, and the material is 304 stainless steel. A longitudinal partition plate 5 is arranged in the top head 2 and opposite to the position of the baffle plate 6, the thickness of the longitudinal partition plate 5 is 25 mm, and the material is 304 stainless steel. The short sides of the top head 2 are respectively provided with an air inlet 7 and an air outlet 8.

[0093] The bottom of the trapping assembly is provided with a material collecting cavity 11 in an inverted conical structure, which is an inverted quadrangular pyramid. The material of the material collecting cavity 11 is 304 stainless steel, and the bottom edge length of the material collecting cavity 11 is 4500 mm. The bottom discharge port of the material collecting cavity 11 is connected to a spiral conveying device.

[0094] The above trapping device is used for trapping tetrachloroisophthalonitrile synthesis gas, the trapping temperature is controlled at 160 DEG C by adjusting the flow of cold air, and the trapping rate of tetrachloroisophthalonitrile reaches 95%.

[0095] Example 4

[0096] The embodiment provides a trapping device for tetrachloroisophthalonitrile synthesis gas, as shown in the drawing, comprising a trapping device body 1 and a top head 2 arranged above the trapping device body 1. Figure 1

[0097] The trapping device body 1 comprises four groups of trapping assemblies arranged at intervals and independent of each other along the length direction of the trapping device body 1, two groups of trapping assemblies are arranged at intervals of 250 mm, each group of trapping assemblies comprises three trapping housings 3 arranged side by side along the width direction of the trapping device body 1, the distance between each two trapping housings 3 is 130 mm, the trapping housing 3 is a cuboid structure with a length of 5000 mm, a width of 5000 mm, a height of 10000 mm, and a wall thickness of 20 mm, and the material of the trapping housing 3 is 304 stainless steel.

[0098] A longitudinal baffle plate 6 is arranged inside and above the trapping housing 3, the baffle plate 6 is parallel to the width direction of the trapping device body 1, the vertical distance between the bottom edge of the baffle plate 6 and the bottom of the trapping housing 3 is 400 mm, and the baffle plate 6 divides the trapping housing 3 into a forward trapping chamber and a return trapping chamber which are communicated at the bottom. The thickness of the baffle plate 6 is 27 mm, and the material of the baffle plate 6 is 304 stainless steel.

[0099] Two manholes 9 are arranged at the top of the trapping housing 3, one manhole 9 is arranged at the top of the trapping housing 3 where the forward trapping chamber is located, and the other manhole 9 is arranged at the top of the trapping housing 3 where the return trapping chamber is located. The material of the manhole 9 is 304 stainless steel, the diameter of the manhole 9 is 800 mm, and the distance between the centers of the two manholes 9 arranged on the same trapping housing 3 is 1400 mm.

[0100] ​The main body 1 of the collection device is provided with a jacket 4 on the outside. The collection shell 3 is arranged in a 4×3 matrix at intervals in the jacket 4. The jacket 4 is provided with an air inlet and an air outlet. The air inlet is connected to a fan. The fan introduces cold air into the jacket 4 to exchange heat with the synthesis gas in the collection shell 3. The jacket 4 is provided with a transverse partition. A set of lifting lugs 10 with opposite positions is provided on the outer walls of the short side of the jacket 4. Two sets of lifting lugs 10 with opposite positions are provided on the outer walls of the long side of the jacket 4.

[0101] The top end cap 2 connects the tops of two adjacent sets of trapping components. The top end cap 2 has a wall thickness of 16mm and is made of 304 stainless steel. A longitudinal baffle 5, 27mm thick and also made of 304 stainless steel, is disposed inside the top end cap 2, opposite to the position of the baffle 6. An air inlet 7 and an air outlet 8 are respectively opened on both sides of the short side of the top end cap 2.

[0102] The bottom of the collecting assembly is provided with an inverted conical receiving chamber 11, which is an inverted square pyramid. The receiving chamber 11 is made of 304 stainless steel, and the side length of the cone base is 5000mm. The discharge port at the bottom of the receiving chamber 11 is connected to a screw conveyor.

[0103] The above-mentioned collection device was used to collect the syngas of tetrachloroisophthalonitrile. By adjusting the flow rate of cold air, the collection temperature was controlled at 180°C, and the collection rate of tetrachloroisophthalonitrile reached 95%.

[0104] Example 5

[0105] This embodiment provides a collection device for the synthesis gas of tetrachloroisophthalonitrile, the collection device being as follows: Figure 1 As shown, it includes a collection device body 1 and a top cap 2 disposed above it.

[0106] The main body 1 of the trapping device includes three sets of trapping components that are spaced apart and independent of each other along its length. The two sets of trapping components are spaced 300mm apart. Each set of trapping components includes four trapping shells 3 arranged side by side along the width of the main body 1 of the trapping device. The trapping shells 3 are spaced 150mm apart. The trapping shells 3 are cuboid structures with a length of 6000mm, a width of 6000mm, a height of 12000mm, and a wall thickness of 22mm. The trapping shells 3 are made of 304 stainless steel.

[0107] The longitudinal baffle 6 is arranged above the inside of the trapping shell 3, and is parallel to the width direction of the trapping device body 1, and a vertical distance of 500 mm is reserved between the bottom edge of the baffle 6 and the bottom of the trapping shell 3, and the baffle 6 divides the inside of the trapping shell 3 into a bottom-communicating outgoing trapping chamber and a bottom-communicating returning trapping chamber. The thickness of the baffle 6 is 30 mm, and the material of the baffle 6 is 304 stainless steel.

[0108] Two manholes 9 are arranged on the top of the trapping shell 3, one of which is arranged on the top of the trapping shell 3 where the outgoing trapping chamber is located, and the other of which is arranged on the top of the trapping shell 3 where the returning trapping chamber is located. The material of the manhole 9 is 304 stainless steel, the diameter of the manhole 9 is 1000 mm, and the center distance of the two manholes 9 arranged on the same trapping shell 3 is 1500 mm.

[0109] The trapping device body 1 is provided with a jacket 4, the trapping shells 3 are arranged in the jacket 4 in a matrix of 3x4, air inlets and air outlets are arranged on the jacket 4, a fan is connected to the air inlets, cold air is introduced into the jacket 4 through the fan to exchange heat with the synthesis gas in the trapping shells 3, a transverse partition is arranged in the jacket 4, a group of position-opposed lifting lugs 10 are arranged on the outer walls of the short sides of the jacket 4, and two groups of position-opposed lifting lugs 10 are arranged on the outer walls of the long sides of the jacket 4.

[0110] The top head 2 is used for connecting the tops of two adjacent groups of trapping assemblies, the wall thickness of the top head 2 is 18 mm, and the material of the top head 2 is 304 stainless steel. A longitudinal partition 5 opposite to the baffle 6 is arranged in the top head 2, the thickness of the longitudinal partition 5 is 30 mm, and the material of the longitudinal partition 5 is 304 stainless steel. Air inlets 7 and air outlets 8 are arranged on the short sides of the top head 2.

[0111] A material collecting cavity 11 with an inverted conical structure is arranged at the bottom of the trapping assembly, and the material collecting cavity 11 is an inverted quadrangular pyramid. The material of the material collecting cavity 11 is 304 stainless steel, and the bottom edge length of the material collecting cavity 11 is 6000 mm. The bottom discharge port of the material collecting cavity 11 is connected to a screw conveying device.

[0112] The above trapping device is used for trapping tetrachloroisophthalonitrile synthesis gas, the trapping temperature is controlled at 170℃ by adjusting the flow of cold air, and the trapping rate of tetrachloroisophthalonitrile reaches 94%.

[0113] The applicant declares that the above description is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. It should be understood by those skilled in the art that any changes or replacements within the technical scope disclosed by the present application can be easily thought out by any person skilled in the art, and all of them fall within the protection scope and disclosure scope of the present application.

Claims

1. A method of use of a capture device for tetrachloroisophthalonitrile synthesis gas, characterized in that, The use method comprises: (I) cooling medium is introduced into the jacket, and the tetrachloroisophthalonitrile synthesis gas is introduced into the top head from the gas inlet, and the longitudinal partition plate guides the synthesis gas into the trapping assembly below; (II) the synthesis gas flows through the forward trapping chamber and the return trapping chamber in turn under the action of the baffle, indirect heat exchange occurs between the synthesis gas and the cooling medium in the jacket during the flow process, tetrachloroisophthalonitrile sublimes and is precipitated, and the synthesis gas passes through the top head from the top of the return trapping chamber and enters the next trapping assembly; (III) the synthesis gas flows back and forth in a zigzag manner in the trapping device body, and is discharged from the gas outlet through the top head after traversing all trapping assemblies step by step; The sublimed tetrachloroisophthalonitrile falls into the material collecting chamber and is continuously discharged through the spiral discharging device; The use method is carried out by using the trapping device as follows: The trapping device comprises a trapping device body and a top head arranged above the trapping device body; The trapping device body comprises two groups of trapping assemblies arranged at intervals and independently along the length direction of the trapping device body, each group of trapping assemblies comprises three trapping housings arranged side by side along the width direction of the trapping device body, a longitudinal baffle is arranged in the trapping housing, the baffle is parallel to the width direction of the trapping device body, and the baffle divides the trapping housing into a bottom-communicating forward trapping chamber and a return trapping chamber; a jacket is arranged outside the trapping device body, the trapping housings are arranged at intervals in the jacket in a 2*3 matrix mode, and cooling medium is introduced into the jacket; A material collecting cavity in an inverted conical structure is arranged at the bottom of the trapping assembly; The top head is used for connecting the tops of two adjacent groups of trapping assemblies, a longitudinal partition plate is arranged in the top head and opposite to the position of the baffle, and a gas inlet and a gas outlet are arranged on the two sides of the short side of the top head.

2. The method of use of claim 1, wherein, The distance between two adjacent groups of trapping assemblies is 100-300 mm.

3. The method of use of claim 2, wherein, The distance between trapping housings in the same group of trapping assemblies is 50-150 mm.

4. The method of use of claim 1, wherein, The trapping housing is a cuboid structure.

5. The method of use of claim 1, wherein, The length of the trapping housing is 3000-6000 mm.

6. The method of use of claim 1, wherein, The width of the trapping housing is 3000-6000 mm.

7. The method of use of claim 1, wherein, The height of the trapping housing is 6000-12000 mm.

8. The method of use of claim 1, wherein, The wall thickness of the trapping housing is greater than or equal to 10 mm.

9. The method of use of claim 1, wherein, The material of the trapping housing is stainless steel.

10. The method of use of claim 9, wherein, The material of the trapping housing is 304 stainless steel.

11. The method of use of claim 1, wherein, The baffle is arranged at the top of the trapping housing, and a vertical distance of 200-500 mm is reserved between the bottom edge of the baffle and the bottom of the trapping housing.

12. The method of use of claim 1, wherein, The thickness of the baffle is 20-30 mm.

13. The method of use of claim 1, wherein, The material of the baffle is stainless steel.

14. The method of use of claim 13, wherein, The material of the baffle is 304 stainless steel.

15. The method of use of claim 1, wherein, The wall thickness of the top head is greater than or equal to 8 mm.

16. The method of use of claim 1, wherein, The material of the top head is stainless steel.

17. The method of use of claim 16, wherein, The material of the top head is 304 stainless steel.

18. The method of use of claim 1, wherein, The thickness of the longitudinal partition plate is 20-30 mm.

19. The method of use of claim 1, wherein, The material of the longitudinal partition plate is stainless steel.

20. The method of use of claim 19, wherein, The material of the longitudinal partition plate is 304 stainless steel.

21. The method of use of claim 1, wherein, The top of the trapping shell is provided with two manholes, one of which is located at the top of the trapping shell where the outgoing trapping chamber is located, and the other is located at the top of the trapping shell where the return trapping chamber is located.

22. The method of use of claim 21, wherein, The material of the manhole is stainless steel.

23. The method of use of claim 22, wherein, The material of the manhole is 304 stainless steel.

24. The method of use of claim 21, wherein, The diameter of the manhole is 500-1000 mm.

25. The method of use of claim 21, wherein, The distance between the centers of the two manholes provided on the same trapping shell is 1000-1500 mm.

26. The method of use of claim 1, wherein, The material of the receiving cavity is stainless steel.

27. The method of use of claim 1, wherein, The material of the receiving cavity is 304 stainless steel.

28. The method of use of claim 27, wherein, The bottom surface of the receiving cavity is a cone with a side length of 3000-6000 mm.

29. The method of use of claim 1, wherein, The bottom discharge port of the receiving cavity is connected to a conveying device.

30. The method of use of claim 1, wherein, The conveying device is a spiral conveying device.

31. The method of use of claim 30, wherein, The jacket is provided with an air inlet and an air outlet, and the air inlet is connected to an air blower.

32. The method of use of claim 1, wherein, A transverse partition is arranged in the jacket.

33. The method of use of claim 1, wherein, At least one lifting lug is arranged on the outer wall of the jacket.

34. The method of use of claim 1, wherein, A set of oppositely positioned lifting lugs is arranged on the outer wall of the short side of the jacket.

35. The method of use of claim 1, wherein, Two sets of oppositely positioned lifting lugs are arranged on the outer wall of the long side of the jacket.

36. The method of use of claim 1, wherein, In step (I), the cooling medium is cold air.

37. The method of use of claim 1, wherein, ​

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