Biphenyl tetracarboxylic dianhydride catalyst roasting preparation device

Abstract

The utility model discloses a biphenyl tetracarboxylic dianhydride catalyst roasting preparation device, relates to the field of catalyst roasting preparation, and solves the problems that dust is directly discharged into air to cause environmental pollution, and the preparation quality of biphenyl tetracarboxylic dianhydride is influenced as the dust is filtered by a simple filter screen and is not collected to flow back into a roasting furnace. Comprising a roasting furnace, a filtering structure communicated with the top of the roasting furnace and a support structure installed on the side face of the roasting furnace, the filtering structure comprises a U-shaped exhaust pipe, the top end of the roasting furnace is communicated with the U-shaped exhaust pipe, the other end of the U-shaped exhaust pipe is communicated with a filtering round cover, a collecting net cover is arranged in the filtering round cover, and the other end of the filtering round cover is communicated with an L-shaped calandria. Dust impurities can be collected through the collecting net cover, the situation that generated gas is directly discharged into the indoor environment, and consequently the indoor environment is affected is prevented, and the dust impurities are regularly treated in a collecting mode and prevented from flowing back into an original roasting furnace.

Description

Technical Field

[0001] The utility model relates to the field of catalyst calcination preparation, in particular to a device for calcining and preparing a biphenyltetracarboxylic dianhydride catalyst. Background Art

[0002] Biphenyltetracarboxylic dianhydride has low toxicity, but a small amount of toxic gas and dust is still produced during the preparation process. The following precautions should still be taken: good ventilation measures should be taken during preparation and handling to avoid inhalation of dust or small amounts of toxic gas.

[0003] The dust generated during the preparation of biphenyltetracarboxylic dianhydride in a roasting furnace is directly discharged into the air, causing environmental pollution and harmful to health when inhaled. If not collected by a simple filter, it will flow back into the roasting furnace, thereby affecting the quality of the preparation of biphenyltetracarboxylic dianhydride. Utility Model Content

[0004] The purpose of the utility model is to provide a biphenyltetracarboxylic dianhydride catalyst roasting preparation device which can collect dust impurities through a collection mesh cover to prevent the generation of gas directly discharged into the indoor environment, thereby solving the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a calcination preparation device for biphenyltetracarboxylic dianhydride catalyst, comprising a calcination furnace, a filtering structure connected to the top of the calcination furnace, and a bracket structure installed on the side of the calcination furnace, wherein the filtering structure comprises a U-shaped exhaust pipe, the top of the calcination furnace is connected to the U-shaped exhaust pipe, the other end of the U-shaped exhaust pipe is connected to a filter circular cover, a collection mesh cover is arranged inside the filter circular cover, and the other end of the filter circular cover is connected to an L-shaped exhaust pipe.

[0006] Preferably, the height of the collecting mesh cover is smaller than the length of the filtering circular cover, and the bottom of the collecting mesh cover and the bottom of the inner bottom of the filtering mesh cover are filled with activated carbon, which is convenient for removing and cleaning the collected dust inside. The bottom of the collecting mesh cover and the bottom of the inner bottom of the filtering mesh cover are filled with activated carbon. The function of the activated carbon is to allow the catalyst preparation to produce a small amount of toxic gas which can be filtered and discharged, thereby reducing the emission of toxic substances into the indoor air.

[0007] Preferably, the bracket structure includes a bottom frame and a top plate, the bottom of the roasting furnace is fixedly connected to the bottom frame, the outer side wall of the bottom frame is fixedly connected to several support rods, the outer side wall of the top plate located above the bottom frame is fixedly connected to the top of the support rod, the top of the two side walls of the top plate are respectively fixedly connected to a bracket and a fixing rod, the other end of the fixing rod is fixedly connected to the outer side surface of the L-shaped exhaust pipe, and the other end of the bracket is fixedly connected to the outer side wall of the U-shaped exhaust pipe. Under the rebound force of the spring, the two side walls of the sealing ring are respectively squeezed into the inside of the annular groove, and the gap area can be covered by the sealing ring. Traditional rubber sealing ring is not used for sealing. The high temperature gas in the roasting furnace can easily cause the rubber sealing ring to be damaged by long-term high temperature aging.

[0008] Preferably, the top side wall of the bracket is also fixedly connected to a pin shaft, a sleeve is rotatably provided on the outer side wall of the pin shaft, a tightening bolt is threaded into the outer side wall of the sleeve, the outer side wall of the filter hood is fixedly connected to the outer side wall of the sleeve, and the caliber of the filter hood is equal to the caliber of the U-shaped exhaust pipe and the caliber of the L-shaped exhaust pipe.

[0009] Preferably, annular grooves are provided on the top and bottom side walls of the filter dome, and the annular grooves are connected to sealing rings through several springs. The other side wall of the sealing ring is chamfered in an arc shape, and annular grooves are also provided on the adjacent side walls of the U-shaped exhaust pipe and the L-shaped exhaust pipe.

[0010] Preferably, several reinforcing rods are fixedly connected to the outer wall of the support rod near the roasting furnace, and an escalator is fixedly connected to the outer wall of the support rod away from the roasting furnace. Two parallel guardrails are fixedly connected to the top of the top plate. The escalator is used for operators to climb up to disassemble the collection mesh cover, so as to regularly collect dust inside the mesh cover and clean it.

[0011] Compared with the prior art, the present invention has the following beneficial effects: the generated gas enters the interior of the filter dome through the U-shaped exhaust pipe, and the dust impurities can be collected by the collection mesh cover, thereby preventing the generated gas from being directly discharged into the indoor environment, thereby affecting the indoor environment; and the dust impurities are collected and regularly processed to prevent them from flowing back into the original roasting furnace, thereby affecting the quality of the preparation of the biphenyltetracarboxylic dianhydride catalyst. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a three-dimensional enlarged structural diagram of the filtering structure in the present utility model;

[0014] Figure 3 This is a schematic diagram of the split, enlarged structure of the filter cover and the collection screen in the utility model;

[0015] Figure 4 This is a three-dimensional enlarged structural diagram of the filter dome in the present invention;

[0016] Figure 5 This is a schematic diagram of the three-dimensional structure of the bracket structure in the present invention from another angle.

[0017] In the figure: 1. roasting furnace; 2. filtering structure; 201. U-shaped exhaust pipe; 202. filtering circular cover; 203. L-shaped exhaust pipe; 204. collecting mesh cover; 205. tightening bolt; 206. sleeve; 207. pin; 208. spring; 209. sealing ring; 2010. annular groove; 3. bracket structure; 301. bottom frame; 302. support rod; 303. reinforcement rod; 304. bracket; 305. guardrail; 306. top plate; 307. escalator; 308. fixing rod. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1 、 Figure 2 and Figure 4 The figure shows a calcination preparation device for a biphenyltetracarboxylic dianhydride catalyst, comprising a calcination furnace 1, a filtering structure 2 connected to the top of the calcination furnace 1, and a support structure 3 installed on the side of the calcination furnace 1, wherein the filtering structure 2 comprises a U-shaped exhaust pipe 201, the top of the calcination furnace 1 is connected to the U-shaped exhaust pipe 201, and the other end of the U-shaped exhaust pipe 201 is connected to a filter circular cover 202 installed thereon, a collecting mesh cover 204 is provided inside the filter circular cover 202, and the other end of the filter circular cover 202 is connected to an L-shaped exhaust pipe 203. It should be noted that during the calcination of the catalyst, the generated gas passes through the U-shaped exhaust pipe 201 and enters the interior of the filter circular cover 202. The dust impurities can be collected by the collecting mesh cover 204 to prevent the generated gas from being directly discharged into the indoor environment, thereby affecting the indoor environment, and the dust impurities are regularly processed by a collection method to prevent them from flowing back into the original calcination furnace 1, thereby affecting the preparation quality of the biphenyltetracarboxylic dianhydride catalyst.

[0020] See also Figure 2 and Figure 4 The height of the collecting mesh cover 204 is less than the length of the filtering circular cover 202, which prevents the overall length of the collecting mesh cover 204 from extending out of both ends of the filtering circular cover 202, making it convenient to remove and clean the collected dust inside. The bottom of the collecting mesh cover 204 and the bottom of the filtering mesh cover 202 are filled with activated carbon. The function of the activated carbon is to allow a small amount of toxic gas produced by the catalyst preparation to be filtered and discharged, thereby reducing the emission of toxic substances into the indoor air, thereby affecting the air quality.

[0021] See Figure 1 and Figure 5The support structure 3 includes a bottom frame 301 and a top plate 306. The bottom of the roasting furnace 1 is fixedly connected to the bottom frame 301, and the outer wall of the bottom frame 301 is fixedly connected to several support rods 302. The outer wall of the top plate 306 located above the bottom frame 301 is fixedly connected to the top of the support rod 302, and the top of the two side walls of the top plate 306 are respectively fixedly connected to a bracket 304 and a fixing rod 308. The other end of the fixing rod 308 is fixedly connected to the outer side surface of the L-shaped exhaust pipe 203, and the other end of the bracket 304 is fixedly connected to the outer wall of the U-shaped exhaust pipe 201. It should be noted that the bracket is used to firmly support the roasting furnace 1 upright, and the bracket 304 and the fixing rod 308 can support the setting of the U-shaped exhaust pipe 201 and the L-shaped exhaust pipe 203.

[0022] See Figure 2 and Figure 3 The top side wall of the bracket 304 is also fixedly connected to a pin shaft 207, and a sleeve 206 is rotatably sleeved on the outer wall of the pin shaft 207, and a tightening bolt 205 is screwed into the outer wall of the sleeve 206, so that the outer wall of the filter cover 202 is fixedly connected to the outer wall of the sleeve 206. The diameter of the filter cover 202 is equal to the diameter of the U-shaped exhaust pipe 201 and the diameter and length of the L-shaped exhaust pipe 203. It should be noted that the tightening bolt 205 can be loosened to push the filter cover 202 to rotate and move horizontally, and the sleeve 206 rotates along the pin shaft 207, so that the top of the filter cover 205 can be opened, and the collection net cover 204 can be easily taken out and the collected dust can be cleaned regularly. During the installation process, after the collection net cover 204 is put back, the filter cover 202 is rotated and moved between the adjacent side walls of the U-shaped exhaust pipe 201 and the L-shaped exhaust pipe 203, and is tightened by rotating the tightening bolt 205, so as to fix the installation, which is simple and convenient to operate.

[0023] See Figure 3 and Figure 4, the top side wall and the bottom side wall of the filter dome 202 are both provided with an annular groove 2010, and the annular groove 2010 is connected to a sealing ring 209 through a number of springs 208. The other side wall of the sealing ring 209 is set with an arc-shaped chamfer. The adjacent side walls of the U-shaped exhaust pipe 201 and the L-shaped exhaust pipe 203 are also provided with an annular groove 2010. It should be noted that there is a gap between the filter dome 202 and the U-shaped exhaust pipe 201 and the L-shaped exhaust pipe 203, which is easy to cause dust leakage and toxic gas leakage. During the installation process, the two ends of the sealing ring 209 are pressed into the inside of the annular groove 2010, so that the gap area is sealed. The sealing ring 209 covers, thereby ensuring sealing and reducing the possibility of leakage. The filter circular cover 202 rotates and moves between the adjacent side walls of the U-shaped exhaust pipe 201 and the L-shaped exhaust pipe 203, which will cause the bottom chamfer of the sealing ring 209 to be squeezed, thereby generating a component force, moving the sealing ring 209 in the vertical direction, thereby compressing the spring 208. When the filter circular cover 202 rotates and moves to the exact position between the adjacent side walls of the U-shaped exhaust pipe 201 and the L-shaped exhaust pipe 203, it is subjected to the rebound force of the spring 208, which squeezes the two side walls of the sealing ring 209 into the annular groove 2010 respectively, and the gap area can be covered by the sealing ring 209.

[0024] See Figure 1 and Figure 5 Several reinforcing rods 303 are fixedly connected to the outer wall of the support rod 302 near the roasting furnace 1 to reinforce the upright setting of the roasting furnace 1. A ladder 307 is fixedly connected to the outer wall of the support rod 302 away from the roasting furnace 1. Two parallel guardrails 305 are fixedly connected to the top of the top plate 306 to provide height protection for climbing operators. It should be noted that the ladder 307 is for operators to climb up to disassemble the collection net cover 204 so that dust can be cleaned regularly.

[0025] Working principle: During the disassembly process of the collection mesh cover 204, the operator climbs to the top plate 306 position through the escalator 307, manually loosens the tightening bolt 205, and manually pushes the filter cover 202 to rotate and move horizontally. The sleeve 206 rotates along the pin 207, so that the top of the filter cover 205 can be opened, and the collection mesh cover 204 can be easily taken out. After cleaning the collected dust, during the installation process, after putting the collection mesh cover 204 back, the filter cover 202 is rotated and moved between the adjacent side walls of the U-shaped exhaust pipe 201 and the L-shaped exhaust pipe 203, and is tightened by rotating the tightening bolt 205 to fix the installation.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include" or "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preparing a biphenyltetracarboxylic dianhydride catalyst by calcination, comprising a calcination furnace (1), a filtering structure (2) connected to the top of the calcination furnace (1), and a support structure (3) installed on the side of the calcination furnace (1), characterized in that: The filtering structure (2) comprises a U-shaped exhaust pipe (201), the top of the roasting furnace (1) is connected to the U-shaped exhaust pipe (201), the other end of the U-shaped exhaust pipe (201) is connected to a filter hood (202), a collection mesh cover (204) is provided inside the filter hood (202), and the other end of the filter hood (202) is connected to an L-shaped exhaust pipe (203).

2. A biphenyltetracarboxylic dianhydride catalyst calcination preparation device according to claim 1, characterized in that: The height of the collecting mesh cover (204) is smaller than the length of the filtering circle cover (202), and the bottom of the collecting mesh cover (204) and the bottom of the filtering circle cover (202) are filled with activated carbon.

3. A biphenyltetracarboxylic dianhydride catalyst calcination preparation device according to claim 1, characterized in that: The support structure (3) comprises a bottom frame (301) and a top plate (306); the bottom of the roasting furnace (1) is fixedly connected to the bottom frame (301); the outer wall of the bottom frame (301) is fixedly connected to a plurality of support rods (302); the outer wall of the top plate (306) located above the bottom frame (301) is fixedly connected to the top of the support rods (302); the tops of the two side walls of the top plate (306) are respectively fixedly connected to brackets (304) and fixed rods (308); the other end of the fixed rod (308) is fixedly connected to the outer side surface of the L-shaped exhaust pipe (203); and the other end of the bracket (304) is fixedly connected to the outer wall of the U-shaped exhaust pipe (201).

4. A biphenyltetracarboxylic dianhydride catalyst calcination preparation device according to claim 3, characterized in that: The top side wall of the bracket (304) is also fixedly connected to a pin shaft (207), the outer side wall of the pin shaft (207) is rotatably sleeved with a sleeve (206), the outer side wall of the sleeve (206) is threaded with a clamping bolt (205), the outer side wall of the filter hood (202) is fixedly connected to the outer side wall of the sleeve (206), and the diameter of the filter hood (202) is equal to the diameter of the U-shaped exhaust pipe (201) and the diameter of the L-shaped exhaust pipe (203).

5. A biphenyltetracarboxylic dianhydride catalyst calcination preparation device according to claim 1, characterized in that: The top side wall and the bottom side wall of the filter dome (202) are both provided with an annular groove (2010), the annular groove (2010) is connected to a sealing ring (209) via a plurality of springs (208), the other side wall of the sealing ring (209) is provided with an arc-shaped chamfer, and the adjacent side walls of the U-shaped exhaust pipe (201) and the L-shaped exhaust pipe (203) are also provided with an annular groove (2010).

6. A biphenyltetracarboxylic dianhydride catalyst calcination preparation device according to claim 1, characterized in that: A plurality of reinforcing rods (303) are fixedly connected to the outer wall of the support rod (302) near the roasting furnace (1), an escalator (307) is fixedly connected to the outer wall of the support rod (302) away from the roasting furnace (1), and two parallel guardrails (305) are fixedly connected to the top of the top plate (306).

Images