Phthalic anhydride light component separation device

Abstract

The utility model provides a phthalic anhydride light component separating device which comprises a separating tower, the bottom of the separating tower is provided with a heat conduction port communicated with an outlet of a heater, the separating tower sequentially comprises a heating area, a phthalic anhydride light component injection area, a separating and collecting area and a discharging area from bottom to top, the lower portion of the phthalic anhydride light component injection area is provided with a material guide pipe, and the material guide pipe is provided with a material outlet. A mounting hole is formed in the side wall of the heating area, a fixing cylinder is arranged in the mounting hole, the material guide pipe is inserted into the fixing cylinder, a plurality of connecting plates are arranged between the inner side wall of the fixing cylinder and the outer side wall of the material guide pipe, and a heat removal assembly is arranged on the outer side wall of the fixing cylinder; according to the utility model, the heat in the separation tank can be quickly and conveniently regulated and controlled by opening and closing the heat removal component, so that the problems that the temperature in the traditional separation tank is difficult to regulate and control, and the separation effect and efficiency of maleic anhydride, benzoic acid and phthalic anhydride in light component substances of phthalic anhydride are influenced due to the fact that the temperature in the separation tank is often too high or too low are solved; the operation is troublesome and the efficiency is low.

Description

Technical Field

[0001] The utility model relates to the technical field of separation equipment, in particular to a phthalic anhydride light component separation device. Background Art

[0002] The phthalic anhydride light fraction separation unit primarily refers to an equipment system used to separate and remove light impurities (such as low-boiling organic acids, aldehydes, and ketones) from the phthalic anhydride product during the phthalic anhydride production process. This unit is crucial for improving the purity and quality of the phthalic anhydride product.

[0003] Light fraction phthalic anhydride is produced during the phthalic anhydride production process through a catalytic oxidation reaction of industrial naphthalene with a catalyst, followed by condensation to produce crude phthalic anhydride. After refined pretreatment, the crude phthalic anhydride is separated in a light fraction column and a product column, with light fraction produced at the top of the light fraction column. Light fraction phthalic anhydride primarily consists of phthalic anhydride and benzoic acid, with minimal impurities such as maleic anhydride. Phthalic anhydride, maleic anhydride, and benzoic acid are all flammable media with a moderate toxicity rating. The phthalic anhydride content is 80%-90%.

[0004] The temperature in a traditional separation tank is difficult to control, which often causes the temperature in the separation tank to be too high or too low, affecting the separation effect and efficiency of maleic anhydride, benzoic acid, and phthalic anhydride in the light component of phthalic anhydride, resulting in cumbersome operation and low efficiency. Utility Model Content

[0005] In view of this, the utility model provides a phthalic anhydride light component separation device, which can realize the rapid and convenient regulation of the heat in the separation tank by opening and closing the heat exhaust component, solving the problem that the temperature in the traditional separation tank is difficult to regulate, which often causes the temperature in the separation tank to be too high or too low, affecting the separation effect and efficiency of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material, and causing troublesome operation and low efficiency.

[0006] In order to solve the above technical problems, the utility model provides a phthalic anhydride light component separation device, including a separation tower, a heat conduction port connected to the outlet of the heater is provided at the bottom of the separation tower, and the separation tower is composed of: a heating zone, a phthalic anhydride light component injection zone, a separation collection zone and a discharge zone from bottom to top. A material guide pipe is provided at the lower part of the phthalic anhydride light component injection zone, a mounting hole is provided on the side wall of the heating zone, a fixed cylinder is provided in the mounting hole, the material guide pipe is inserted into the fixed cylinder, and a plurality of connecting plates are provided between the inner side wall of the fixed cylinder and the outer side wall of the material guide pipe, and a heat exhaust component is provided on the outer side wall of the fixed cylinder. The utility model can be used to separate the light component of the phthalic anhydride by connecting the inner side wall of the heater to the outer side wall of the fixed cylinder. Heat at different temperatures is introduced into the separation tower to achieve classified separation and collection of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material in the phthalic anhydride light component injection zone. The excess heat in the heating zone is discharged through the heat exhaust component, which greatly improves the separation effect of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material, improves the separation efficiency, and is more convenient and efficient. It solves the problem that it is difficult to control the temperature in the traditional separation tank, which often causes the temperature in the separation tank to be too high or too low, affecting the separation effect and efficiency of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material, and causing troublesome operation and low efficiency.

[0007] The heat exhaust component includes a sealing plug that is sleeved on the outer wall of the material guide tube and coaxial with the fixed tube. The outer diameter of the sealing plug is adapted to the inner diameter of the fixed tube. A telescopic push rod is provided on the outer wall of the sealing plug, and a fixed disk is provided on the material guide tube. The fixed end of the telescopic push rod is fixed on the fixed disk, and the output end of the telescopic push rod is fixed to the outer wall of the sealing plug.

[0008] There are three telescopic push rods, which are evenly distributed on the fixed plate. The telescopic push rods are electric telescopic rods or hydraulic telescopic rods.

[0009] A temperature sensor is provided inside the heating zone.

[0010] A heat-conducting cover is provided on the upper part of the heating zone and the lower part of the phthalic anhydride light component injection zone. The heat-conducting cover is a hemispherical structure, and the side wall of the heat-conducting cover at the maximum diameter is welded to the inner wall of the separation tower.

[0011] A filter screen is provided at the upper part of the phthalic anhydride light component injection zone and the lower part of the separation and collection zone. An ear plate is provided on the inner side wall of the separation tower. The filter screen is provided on the upper part of the ear plate. A guide pipe connected to the inlet of the cooling tower is provided in the separation and collection section. The guide pipe runs through the side wall of the separation tower.

[0012] A discharge pipe is provided at the upper portion of the discharge area.

[0013] In summary, compared with the prior art, this application has at least one of the following beneficial technical effects:

[0014] 1. The utility model can achieve the classification, separation and collection of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material in the phthalic anhydride light component injection zone by introducing heat of different temperatures of the heater into the separation tower, and discharge the excess heat in the heating zone through the heat exhaust component, thereby greatly improving the separation effect of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material, improving the separation efficiency, and making the operation more convenient and efficient. It solves the problem that the temperature in the traditional separation tank is difficult to control, which often causes the temperature in the separation tank to be too high or too low, affecting the separation effect and efficiency of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material, and causing troublesome operation and low efficiency.

[0015] 2. When the output rod of the telescopic push rod is extended to push the sealing plug into the fixed cylinder, the sealing operation of the fixed cylinder can be achieved, which can avoid unnecessary dissipation of heat in the heating zone. Cooperating with the work of the heater, the continuous supply of heat and concentrated heating operation in the heating zone can be achieved; when the temperature in the heating zone is too high, the output rod of the telescopic push rod is started to retract to pull the sealing plug and separate it from the inner wall of the fixed cylinder. At this time, the excess heat in the heating zone may be dissipated and discharged through the fixed cylinder, avoiding separation failure caused by the continuous rise in temperature in the heating zone.

[0016] 3. The utility model can evenly guide the heat in the heating zone into the phthalic anhydride light component injection zone through the heat conductive cover, thereby realizing stable and efficient separation of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component injection zone, and the operation is more convenient.

[0017] 4. The utility model can block and filter the separated particulate matter through the filter screen to prevent it from escaping into the air and affecting the air quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a phthalic anhydride light component separation device of the present invention;

[0019] Figure 2 For this utility model Figure 1 A magnified view of the structure at center A;

[0020] Figure 3 This is a bottom view of the phthalic anhydride light component separation device of the utility model;

[0021] Figure 4 For this utility model Figure 3 Cross-sectional view at the middle BB.

[0022] Explanation of the reference numerals: 100, separation tower; 110, heat transfer port; 120, heating zone; 121, mounting hole; 122, fixing cylinder; 130, phthalic anhydride light component injection zone; 131, material guide pipe; 132, heat transfer cover; 140, separation and collection zone; 141, filter screen; 142, flow guide pipe; 150, discharge zone; 151, discharge pipe; 200, heat exhaust assembly; 201, sealing plug; 202, telescopic push rod; 203, fixing plate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiment of the present invention clearer, the following will be combined with the appended drawings of the embodiment of the present invention. Figure 1-4 , clearly and completely describing the technical solutions of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field fall within the scope of protection of the present invention.

[0024] like Figure 1-4 As shown: This embodiment provides a phthalic anhydride light component separation device, including a separation tower 100, a heat conduction port 110 connected to the outlet of the heater is provided at the bottom of the separation tower 100, the brand of the heater is: Hebang Machinery, model: ZRFD-500, the separation tower 100 is composed of: a heating zone 120, a phthalic anhydride light component injection zone 130, a separation and collection zone 140 and a discharge zone 150 from bottom to top, a material guide pipe 131 is provided at the lower part of the phthalic anhydride light component injection zone 130, a mounting hole 121 is opened on the side wall of the heating zone 120, a fixed cylinder 122 is provided in the mounting hole 121, the material guide pipe 131 is inserted in the fixed cylinder 122, and a plurality of connecting plates are provided between the inner side wall of the fixed cylinder 122 and the outer side wall of the material guide pipe 131, the fixed cylinder A heat dissipation component 200 is provided on the outer wall of 122. The utility model can introduce heat of different temperatures of the heater into the separation tower 100 to achieve the classification, separation and collection of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material in the phthalic anhydride light component injection zone 130. The excess heat in the heating zone 120 is discharged through the heat dissipation component 200, which greatly improves the separation effect of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material, improves the separation efficiency, and is more convenient and efficient. It solves the problem that it is difficult to control the temperature in the traditional separation tank, which often causes the temperature in the separation tank to be too high or too low, affecting the separation effect and efficiency of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material, and causing troublesome operation and low efficiency.

[0025] According to one embodiment of the present invention, Figure 1-4As shown, the heat dissipation component 200 includes a sealing plug 201 which is sleeved on the outer wall of the guide tube 131 and is coaxial with the fixed cylinder 122. The sealing plug 201 should be a rubber plug that is resistant to high temperature, pressure and wear. The outer diameter of the sealing plug 201 is adapted to the inner diameter of the fixed cylinder 122. A telescopic push rod 202 is provided on the outer wall of the sealing plug 201, and a fixed disk 203 is provided on the guide tube 131. The fixed end of the telescopic push rod 202 is fixed on the fixed disk 203, and the output end of the telescopic push rod 202 is fixed together with the outer wall of the sealing plug 201. When the output rod of the telescopic push rod 202 is extended to push the sealing plug 201, the output rod of the telescopic push rod 202 is fixed to the fixed disk 203. When the sealing plug 201 is inserted into the fixed cylinder 122, the sealing operation of the fixed cylinder 122 can be achieved, which can avoid unnecessary dissipation of heat in the heating zone 120. In conjunction with the operation of the heater, the continuous supply of heat and concentrated heating operation in the heating zone 120 can be achieved; when the temperature in the heating zone 120 is too high, the output rod of the telescopic push rod 202 is started to retract to pull the sealing plug 201 and the inner wall of the fixed cylinder 122 apart. At this time, the excess heat in the heating zone 120 may be dissipated and discharged through the fixed cylinder 122, thereby avoiding separation failure caused by the continuous rise in the temperature in the heating zone 120.

[0026] According to another embodiment of the present invention, Figure 1 and Figure 2 As shown, there are three telescopic push rods 202, which are evenly distributed on the fixed plate 203. The telescopic push rods 202 are electric telescopic rods or hydraulic telescopic rods.

[0027] A temperature sensor is provided inside the heating zone 120. The temperature sensor is a high temperature and high pressure resistant sensor. The brand of the temperature sensor is: Chongqing Yunsu Sensor Technology Co., Ltd., model: WR3 / 25. The utility model can monitor the temperature in the heating zone 120 in real time through the temperature sensor, which is more convenient and intelligent.

[0028] According to another embodiment of the present invention, Figure 1 and Figure 4 As shown, a heat-conducting cover 132 is provided at the upper part of the heating zone 120 and the lower part of the phthalic anhydride light component injection zone 130. The heat-conducting cover 132 has a hemispherical structure, and the side wall of the heat-conducting cover 132 at the maximum diameter is welded to the inner wall of the separation tower 100. The utility model can uniformly guide the heat in the heating zone 120 into the phthalic anhydride light component injection zone 130 through the heat-conducting cover 132, thereby realizing stable and efficient separation of maleic anhydride, benzoic acid, and phthalic anhydride in the phthalic anhydride light component injection zone 130, and making the operation more convenient.

[0029] A filter screen plate 141 is provided at the upper part of the phthalic anhydride light component injection zone 130 and the lower part of the separation and collection zone 140. An ear plate is provided on the inner wall of the separation tower 100. The filter screen plate 141 is provided on the upper part of the ear plate. A guide pipe 142 connected to the inlet of the cooling tower is provided in the separation and collection zone 140. The guide pipe 142 runs through the side wall of the separation tower 100. The utility model can block and filter the separated particulate debris through the filter screen plate 141 to prevent it from escaping into the air and affecting the air quality.

[0030] A discharge pipe 151 is provided at the upper portion of the discharge area 150 . The present invention can discharge or collect other separated products in a centralized manner through the discharge pipe 151 , making operation more convenient.

[0031] The use method of this utility model:

[0032] First of all, it should be made clear that the separation device involved in the present invention is mainly used for separating substances with different boiling points. The present invention takes the separation of maleic anhydride (202°C), benzoic acid (249°C) and phthalic anhydride (284°C) in the light component of phthalic anhydride as an example to explain its method of use in detail. When separation operation is required, the heater is first started until the temperature of the heater is between 210°C and 240°C (when the temperature sensor detects that the temperature in the heating zone 120 is higher than 245°C, the output rod of the telescopic push rod 202 is retracted to pull the sealing plug 201 and the inner wall of the fixed cylinder 122 apart. At this time, the excess heat in the heating zone 120 is dissipated or discharged through the fixed cylinder 122 until the heating zone 120 is heated. When the temperature of 120 is restored to 220°C, the output rod of the telescopic push rod 202 is extended to push the sealing plug 201 into the fixed cylinder 122, so that the sealing operation of the fixed cylinder 122 can be achieved until the collection operation of maleic anhydride is completed. The heat generated by the heater will be discharged through the outlet of the heater to the heat conduction port 110 of the heating zone 120 of the separation tower 100 connected thereto and guided into the heating zone 120 for storage. The heat in the heating zone 120 is evenly guided into the phthalic anhydride light component injection zone 130 through the heat conduction cover 132, and then introduced into the phthalic anhydride light component injection zone 130 through the guide pipe 131. In this process, the temperature in the phthalic anhydride light component injection zone 130 is higher than 202°C. When the temperature is lower than 249°C, maleic anhydride will be evaporated and eventually discharged through the guide pipe 131 in the separation and collection area 140. When the maleic anhydride is collected, the guide pipe 131 of the maleic anhydride collection bucket is closed through the diversion valve, and the guide pipe 131 of the benzoic acid is opened. Then the heater is started to raise the temperature to between 254°C and 279°C (when the temperature sensor detects that the temperature in the heating zone 120 is higher than 275°C, the output rod of the telescopic push rod 202 is retracted to pull the sealing plug 201 away from the inner wall of the fixed cylinder 122. At this time, the excess heat in the heating zone 120 may be dissipated through the fixed cylinder 122 until the temperature of the heating zone 120 returns to 260°C, and the telescopic push rod 202 is started. When the output rod is extended to push the sealing plug 201 into the fixed cylinder 122, the sealing operation of the fixed cylinder 122 can be achieved until the collection operation of benzoic acid is completed. At this time, the benzoic acid will be evaporated and collected. When the collection of benzoic acid is completed, the guide pipe 131 of the benzoic acid collection barrel is closed through the diversion valve, and the guide pipe 131 of the phthalic anhydride is opened. Then, the heater is started to work until the temperature rises to above 284°C. At this time, formic acid will be evaporated and collected, and the operation is more convenient and efficient. The utility model can realize the classification, separation and collection of maleic anhydride, benzoic acid and phthalic anhydride in the phthalic anhydride light component material in the phthalic anhydride light component injection zone 130 by introducing heat of different temperatures of the heater into the separation tower 100.The heat removal assembly 200 discharges excess heat from the heating zone 120, significantly improving the separation of maleic anhydride, benzoic acid, and phthalic anhydride from the light component of phthalic anhydride. This improves separation efficiency and makes operation more convenient and efficient. This solves the problem of difficult temperature control within conventional separation tanks, which often results in excessively high or low temperatures within the separation tank, impacting the separation efficiency and efficiency of maleic anhydride, benzoic acid, and phthalic anhydride from the light component of phthalic anhydride, leading to cumbersome operation and low efficiency.

[0033] Furthermore, it should be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0034] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles described in the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A phthalic anhydride light component separation device, comprising a separation tower (100), wherein the bottom of the separation tower (100) is provided with a heat conduction port (110) connected to an outlet of a heater, characterized in that: The separation tower (100) comprises, from bottom to top, a heating zone (120), a phthalic anhydride light component injection zone (130), a separation and collection zone (140), and a discharge zone (150). A material guide pipe (131) is provided at the lower portion of the phthalic anhydride light component injection zone (130). A mounting hole (121) is provided on the side wall of the heating zone (120). A fixed cylinder (122) is provided in the mounting hole (121). The material guide pipe (131) is inserted into the fixed cylinder (122). A plurality of connecting plates are provided between the inner wall of the fixed cylinder (122) and the outer wall of the material guide pipe (131). A heat exhaust component (200) is provided on the outer wall of the fixed cylinder (122).

2. The phthalic anhydride light component separation device according to claim 1, wherein: The heat exhaust assembly (200) comprises a sealing plug (201) sleeved on the outer wall of the material guide tube (131) and coaxial with the fixed cylinder (122); the outer diameter of the sealing plug (201) is adapted to the inner diameter of the fixed cylinder (122); a telescopic push rod (202) is provided on the outer wall of the sealing plug (201); a fixed disk (203) is provided on the material guide tube (131); the fixed end of the telescopic push rod (202) is fixed on the fixed disk (203); and the output end of the telescopic push rod (202) is fixed together with the outer wall of the sealing plug (201).

3. The phthalic anhydride light component separation device according to claim 2, wherein: There are three telescopic push rods (202) which are evenly distributed on the fixed plate (203). The telescopic push rods (202) are electric telescopic rods or hydraulic telescopic rods.

4. The phthalic anhydride light component separation device according to claim 3, wherein: A temperature sensor is provided inside the heating zone (120).

5. The phthalic anhydride light component separation device according to claim 4, wherein: A heat-conducting cover (132) is provided at the upper part of the heating zone (120) and the lower part of the phthalic anhydride light component injection zone (130). The heat-conducting cover (132) is a hemispherical structure, and the side wall of the heat-conducting cover (132) at the maximum diameter is welded to the inner wall of the separation tower (100).

6. The phthalic anhydride light component separation device according to claim 5, wherein: A filter screen plate (141) is provided at the upper portion of the phthalic anhydride light component injection zone (130) and the lower portion of the separation and collection zone (140); an ear plate is provided on the inner side wall of the separation tower (100); the filter screen plate (141) is provided on the upper portion of the ear plate; a flow guide pipe (142) connected to the inlet of the cooling tower is provided in the separation and collection zone (140); and the flow guide pipe (142) passes through the side wall of the separation tower (100).

7. The phthalic anhydride light component separation device according to claim 6, wherein: A discharge pipe (151) is provided at the upper portion of the discharge area (150).

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