Mother liquor metering device for polyolefin catalyst production

Abstract

The utility model relates to the technical field of polyolefin catalyst production, in particular to a mother liquor metering device for polyolefin catalyst production. The technical problems that the production efficiency is low, the production time is long and the feeding production of a plurality of synthesis kettles cannot be met due to the fact that the conventional production equipment is low in production efficiency, long in production time and incapable of meeting the requirement of feeding production of a plurality of synthesis kettles because all mother liquor needs to be transferred and raw materials need to be added again after the mother liquor is prepared due to the fact that a dissolving kettle is not provided with a metering instrument are solved. According to the technical scheme, the mother liquor metering device for polyolefin catalyst production comprises a configuration assembly and a metering assembly; after the mother liquor metering tank is mounted, the connecting valve is controlled to receive mother liquor from the inside of the dissolving kettle from the mother liquor transfer pipe, the mother liquor can be transferred to the synthesis kettle at any time for reaction production, and the dissolving kettle can be used for preparing new mother liquor again, so that multi-batch circulating work is realized, the working efficiency is improved, and multi-batch raw materials can be fed by utilizing the dissolving kettle; after being quantitatively transferred to a mother liquor metering tank, the mother liquor is transferred to a synthesis kettle, so that the synthesis efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyolefin catalyst production, in particular to a mother liquid metering device used for polyolefin catalyst production. Background Art

[0002] In the production process of polyolefin catalysts, the dissolving kettle is used as a device for configuring mother liquor. By adding raw materials with specific solid and liquid amounts, the required mother liquor is generated through reaction, and then the mother liquor in the kettle is transferred to the synthesis kettle for reaction to generate polyolefin catalysts. In the production process of polyolefin catalysts, the amount of solid raw materials added to the dissolving kettle determines the amount of other raw materials added, and the total amount of mother liquor can be calculated. In the existing production equipment, during the production process, the dissolving kettle usually has no metering instrument. After the mother liquor is configured, all the mother liquor needs to be transferred and the raw materials need to be added again to configure the mother liquor, resulting in low production efficiency and long production time, which cannot meet the feeding production of multiple synthesis kettles. Therefore, we propose a mother liquor metering device for polyolefin catalyst production to solve the above-mentioned problems. Utility Model Content

[0003] In order to overcome the existing production equipment, the dissolution kettle usually has no metering instrument. After the mother liquor is prepared, all the mother liquor needs to be transferred and the raw materials need to be added again to prepare the mother liquor, which makes the production efficiency low and the production time long, and cannot meet the problem of feeding production of multiple synthesis kettles.

[0004] The technical solution of the utility model is: a mother liquor metering device for polyolefin catalyst production, comprising a configuration component and a metering component; the configuration component is a configuration component used for dissolving raw materials in the polyolefin catalyst production process, and a metering component for accurately measuring the flow rate and volume of the mother liquor is installed on the outside of the configuration component to ensure that the correct proportion of raw materials is added during the production process.

[0005] Preferably, after installing the mother liquor metering tank, the connecting valve is controlled to receive the mother liquor from the dissolving kettle through the mother liquor transfer tube in the mother liquor metering tank, which can be transferred to the synthesis kettle for reaction production at any time. The dissolving kettle can be configured with new mother liquor again to realize multi-batch circulation work and improve work efficiency. Multiple batches of raw materials can be put into the dissolving kettle, and the driving motor is used to drive the stirring frame to ensure the uniform distribution of raw materials and solvents during the dissolution process, promote the mixing and dissolution of raw materials and solvents, and transfer them to the mother liquor metering tank in a quantitative manner, and then transfer them to the synthesis kettle to realize the mother liquor configuration of multiple batches of solid raw materials in the dissolving kettle, improve the synthesis efficiency, and when the dissolving kettle needs to be overhauled, the mother liquor inside the dissolving kettle can be transferred to the mother liquor metering tank for continued production. There is no conflict between production and overhaul, which improves efficiency. The equipment has a simple structure, a reasonable process, and is easy to operate. The materials used are all standing supplies, which are easy to implement, have low maintenance costs, and embody great derivative economic value.

[0006] Preferably, the configuration components include a dissolving kettle, a feeding pipe, a driving motor, a stirring frame, a regulating valve, a transmission pipe, a control valve, a mother liquor transfer filter bag, a delivery pipe, a mother liquor transfer valve, a vent pipe and a vent valve. A feeding pipe is provided at the upper end of the dissolving kettle, a driving motor is provided at the center of the upper end of the dissolving kettle, one end of the driving motor is located inside the dissolving kettle and a stirring frame is provided, and a feeding pipe is provided on the outside of the driving motor. The driving motor is used to drive the stirring frame to assist the production of the dissolving kettle, thereby ensuring uniform distribution of raw materials and solvents during the dissolution process, effectively promoting mixing and dissolution of raw materials and solvents, avoiding local concentrations that are too high or too low, shortening the dissolution time, and improving the dissolution efficiency.

[0007] Preferably, a liquid outlet pipe is provided at the center of the lower end of the dissolving kettle, a regulating valve is provided at one end of the liquid outlet pipe, a transmission pipe is provided at the end of the regulating valve away from the liquid outlet pipe, a control valve is provided at one end of the transmission pipe, and two groups of mother liquor transfer filter bags are provided at the lower end of the control valve. The control valve is used to control the mother liquor to pass through the mother liquor transfer filter bag, and the speed and pressure of the mother liquor entering the filter bag are adjusted to optimize the filtration effect, ensure that the particulate matter in the filter bag fully contacts the filter medium, and maintain a suitable residence time, thereby improving the filtration efficiency and the quality of the filtrate.

[0008] Preferably, a vent pipe is provided at the upper end of the dissolving kettle, one end of which is provided with a vent valve. The vent pipe extends through the dissolving kettle to the interior. By connecting the dissolving kettle with the vent pipe, the pressure inside and outside the dissolving kettle is balanced to ensure the stability and quality of the catalyst mother liquor.

[0009] Preferably, the metering component includes a mother liquid metering tank, a mother liquid transfer pipe, a connecting valve, a liquid inlet valve, a liquid level gauge, a mother liquid outlet pipe, a liquid outlet valve, a delivery valve, a nitrogen pipe, a nitrogen valve, a metering tank empty pipe, a pipeline valve and a merging valve. A mother liquid metering tank is provided on the outside of the dissolving kettle, a mother liquid transfer pipe is provided on the outer end of the transmission pipe, a connecting valve is provided on one end of the mother liquid transfer pipe close to the transmission pipe, and a liquid inlet valve is provided on one end of the mother liquid transfer pipe close to the mother liquid metering tank. The mother liquid is transferred from the mother liquid transfer pipe to the mother liquid metering tank by adopting the transfer valve to control the flow rate of the mother liquid, and the transmission amount of the mother liquid is adjusted according to actual needs to ensure that the mother liquid is transferred to the metering tank at a predetermined speed and amount to adapt to changes in different production batches and process requirements.

[0010] Preferably, a liquid outlet valve is provided at the lower end of the mother liquid metering tank, a mother liquid outlet pipe is provided at one end of the liquid outlet valve, a delivery valve is provided at one end of the mother liquid outlet pipe away from the liquid outlet valve, the mother liquid outlet pipe is connected to the transmission pipe through the delivery valve, and a liquid level gauge is provided on the outer wall of the mother liquid metering tank. The liquid outlet valve is used to control the mother liquid to be pressed into the synthesis reactor through the mother liquid outlet pipe for reaction, and the pressure of the mother liquid entering the synthesis reactor is controlled to avoid equipment damage or reaction out of control due to excessive pressure.

[0011] Preferably, a nitrogen pipe is provided at the upper end of the mother liquid metering tank on one side of the liquid inlet valve, a nitrogen valve is provided at one end of the nitrogen pipe, a metering tank empty pipe is provided on the outside of the nitrogen pipe, a pipeline valve is provided on the outside of the metering tank empty pipe, the metering tank empty pipe is connected to the vent pipe, a merging valve is provided at the outer end of the metering tank empty pipe near the vent pipe, a remote pressure gauge is provided at the upper end of the mother liquid metering tank, and an on-site pressure gauge is provided on the outer wall of the mother liquid metering tank. The installation of the on-site pressure gauge facilitates pressure detection, and the installation of the remote pressure gauge facilitates DCS detection and control, controls the nitrogen pipe, is used for tank pressure replacement, and is the power source for mother liquid transfer. The common vent valve is used to relieve the pressure of the tank through the metering tank empty pipe at the top of the mother liquid metering tank to the vent valve of the dissolving kettle vent pipe.

[0012] Beneficial effects of the utility model:

[0013] 1. Compared with the traditional production equipment, after installing the mother liquor metering tank, the connecting valve is controlled to receive the mother liquor from the dissolving kettle through the mother liquor transfer pipe from the mother liquor metering tank, which can be transferred to the synthesis kettle for reaction production at any time. The dissolving kettle can be configured with new mother liquor again to realize multi-batch circulation work and improve work efficiency.

[0014] 2. Multiple batches of raw materials can be put into the dissolving kettle, and the driving motor is used to drive the stirring frame to ensure the uniform distribution of raw materials and solvents during the dissolution process, promote the mixing and dissolution of raw materials and solvents, and transfer them to the mother liquor metering tank in a quantitative manner, and then transfer them to the synthesis kettle, so as to realize the mother liquor configuration of multiple batches of solid raw materials in the dissolving kettle and improve the synthesis efficiency.

[0015] 3. When the dissolving kettle needs to be overhauled, the mother liquor inside the dissolving kettle can be transferred to the mother liquor metering tank to continue production. Production and maintenance do not conflict, which improves efficiency. The equipment has a simple structure, reasonable process, and convenient operation. The materials used are all stock materials, which are easy to implement and have low maintenance costs, and the derived economic value is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the dissolving kettle structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the mother liquid transfer filter bag of the utility model;

[0019] Figure 4 This is a schematic structural diagram of the mother liquid metering tank of the utility model.

[0020] Explanation of the accompanying drawings: 1. Configuration components; 101. Dissolution kettle; 102. Feeding pipeline; 103. Driving motor; 104. Stirring frame; 105. Adjusting valve; 106. Transmission pipe; 107. Control valve; 108. Mother liquor transfer filter bag; 109. Delivery pipe; 110. Mother liquor transfer valve; 111. Vent pipe; 112. Vent valve; 2. Metering components; 201. Mother liquor metering tank; 202. Mother liquor transfer pipe; 203. Connecting valve; 204. Liquid inlet valve; 205. Liquid level meter; 206. Mother liquor outlet pipe; 207. Liquid outlet valve; 208. Delivery valve; 209. Nitrogen pipe; 210. Nitrogen valve; 211. Metering tank empty pipe; 212. Pipeline valve; 213. Merging valve. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1-4 The utility model provides an embodiment: a mother liquor metering device for polyolefin catalyst production, comprising a configuration component 1 and a metering component 2; the configuration component 1 is a configuration component 1 for dissolving raw materials in the polyolefin catalyst production process, and the outer side of the configuration component 1 is installed with a metering component 2 for accurately measuring the flow rate and volume of the mother liquor to ensure that the correct proportion of raw materials is added during the production process.

[0023] See also Figure 1-2In this embodiment, the configuration component 1 includes a dissolving kettle 101, a feeding pipeline 102, a driving motor 103, a stirring frame 104, a regulating valve 105, a transmission pipe 106, a control valve 107, a mother liquor transfer filter bag 108, a delivery pipe 109, a mother liquor transfer valve 110, a vent pipe 111 and a vent valve 112. The upper end of the dissolving kettle 101 is provided with a feeding pipeline 102, and the upper end center of the dissolving kettle 101 is provided with a driving motor 103. One end of the driving motor 103 is located inside the dissolving kettle 101 and is provided with a stirring frame 104. The outer side of the driving motor 103 is provided with a feeding pipeline 102. The driving motor 103 drives the stirring frame 104 to assist the production of the dissolving kettle 101, thereby ensuring the raw materials and the solvent in the dissolving process. Uniform distribution effectively promotes the mixing and dissolution of raw materials and solvents, avoids local over-high or over-low concentrations, shortens the dissolution time, and improves the dissolution efficiency. A liquid outlet pipe is provided at the center of the lower end of the dissolution kettle 101, and a regulating valve 105 is provided at one end of the liquid outlet pipe. A transmission pipe 106 is provided at the end of the regulating valve 105 away from the liquid outlet pipe, and a control valve 107 is provided at one end of the transmission pipe 106. Two groups of mother liquor transfer filter bags 108 are provided at the lower end of the control valve 107. The mother liquor is controlled to pass through the mother liquor transfer filter bag 108 by using the control valve 107, and the speed and pressure of the mother liquor entering the filter bag are adjusted to optimize the filtration effect, ensure that the particulate matter in the filter bag fully contacts the filter medium, and maintain a suitable residence time, thereby improving the filtration efficiency and the quality of the filtrate.

[0024] See also Figure 1-3 In this embodiment, a vent pipe 111 is provided at the upper end of the dissolving kettle 101, and a vent valve 112 is provided at one end of the vent pipe 111. The vent pipe 111 passes through the dissolving kettle 101 and extends to the inside. The vent pipe 111 is used to connect the dissolving kettle 101 to maintain the pressure balance inside and outside the dissolving kettle 101, thereby ensuring the stability and quality of the catalyst mother liquid. The metering component 2 includes a mother liquid metering tank 201, a mother liquid transfer pipe 202, a connecting valve 203, a liquid inlet valve 204, a liquid level meter 205, a mother liquid outlet pipe 206, a liquid outlet valve 207, a delivery valve 208, a nitrogen pipe 209, a nitrogen valve 210, a metering tank empty pipe 211, a pipe A mother liquor metering tank 201 is provided on the outer side of the dissolving kettle 101, a mother liquor transfer pipe 202 is provided on the outer end of the transmission pipe 106, a connecting valve 203 is provided on the end of the mother liquor transfer pipe 202 close to the transmission pipe 106, and a liquid inlet valve 204 is provided on the end of the mother liquor transfer pipe 202 close to the mother liquor metering tank 201. The mother liquor is transferred from the mother liquor transfer pipe 202 to the mother liquor metering tank 201 by adopting the transfer valve, and the flow rate of the mother liquor is accurately controlled. The transmission amount of the mother liquor is adjusted according to actual needs to ensure that the mother liquor is transferred to the metering tank at a predetermined speed and amount to adapt to changes in different production batches and process requirements.

[0025] See also Figure 2-4In this embodiment, a liquid outlet valve 207 is provided at the lower end of the mother liquid metering tank 201, and a mother liquid outlet pipe 206 is provided at one end of the liquid outlet valve 207. A delivery valve 208 is provided at one end of the mother liquid outlet pipe 206 away from the liquid outlet valve 207. The mother liquid outlet pipe 206 is connected to the transmission pipe 106 through the delivery valve 208. A liquid level gauge 205 is provided on the outer wall of the mother liquid metering tank 201. The mother liquid is pressed into the synthesis reactor through the mother liquid outlet pipe 206 by adopting the liquid outlet valve 207 to control the mother liquid to react, and the pressure of the mother liquid entering the synthesis reactor is controlled to avoid equipment damage or reaction out of control due to excessive pressure. A nitrogen pipe 209 is provided at the upper end of the mother liquid metering tank 201, which is located on one side of the liquid inlet valve 204. A nitrogen valve 208 is provided at one end of the nitrogen pipe 209. 10. A metering tank empty pipe 211 is provided on the outside of the nitrogen pipe 209, a pipeline valve 212 is provided on the outside of the metering tank empty pipe 211, the metering tank empty pipe 211 is connected with the vent pipe 111, a merging valve 213 is provided on the outer end of the metering tank empty pipe 211 near the vent pipe 111, a remote pressure gauge is provided on the upper end of the mother liquid metering tank 201, and an on-site pressure gauge is provided on the outer wall of the mother liquid metering tank 201. The on-site pressure gauge is installed to facilitate pressure detection, and the remote pressure gauge is installed to facilitate DCS detection and control. The nitrogen pipe 209 is controlled to be used for tank pressure replacement and mother liquid transfer power source, and the common regulating valve is used to release the pressure of the tank through the metering tank empty pipe 211 at the top of the mother liquid metering tank 201 to the vent valve 112 of the vent pipe 111 of the dissolving kettle 101.

[0026] When working, firstly, specific raw materials are put into the dissolving kettle 101, and the driving motor 103 is used to drive the stirring frame 104 to assist the production of the dissolving kettle 101, to ensure the uniform distribution of raw materials and solvents during the dissolving process, to promote the mixing and dissolution of raw materials and solvents, to avoid the situation where the local concentration is too high or too low, to configure the mother liquor, to close the delivery valve 208 and the control valve 107, to open the regulating valve 105, the connecting valve 203, and the liquid inlet valve 204, and the mother liquor inside the dissolving kettle 101 is transferred to the mother liquor metering tank 201 through the mother liquor transfer pipe 202, and after the mother liquor is metered, the liquid outlet valve 207, the delivery valve 208, and the control valve 107 are opened, and the regulating valve 105, the connecting valve 203, and the liquid inlet valve 204 are closed, and the mother liquor inside the mother liquor metering tank 201 passes through the mother liquor outlet pipe 206 and the mother liquor transfer bag and enters the synthesis kettle through the mother liquor transfer valve 110 to continue production.

[0027] A level gauge 205 is arranged at the outer end of the mother liquor metering tank 201 for metering, an on-site pressure gauge is installed for pressure detection, and a remote pressure gauge is installed for DCS detection and control. A DN25 low-pressure nitrogen pipe 209 is arranged at the upper end of the mother liquor metering tank 201 for tank pressurization and replacement, and a power source for mother liquor transfer. A DN25 metering tank empty pipe 211 is arranged at the mother liquor metering tank 201 to a common regulating vent valve in front of the vent valve 112 of the dissolving kettle 101 to relieve the pressure of the tank, so that the dissolving kettle 101 can be configured with multiple batches of synthetic mother liquor.

[0028] Through the above steps, after installing the mother liquor metering tank 201, the connecting valve 203 is controlled to receive the mother liquor from the dissolving kettle 101 through the mother liquor transfer pipe 202 by the mother liquor metering tank 201, and the mother liquor can be transferred to the synthesis kettle for reaction production at any time. The dissolving kettle 101 can be configured with new mother liquor again to realize multi-batch circulation work and improve work efficiency. Multiple batches of raw materials can be put into the dissolving kettle 101, and the driving motor 103 is used to drive the stirring frame 104 to ensure the uniform distribution of raw materials and solvents during the dissolution process, promote the mixing and dissolution of raw materials and solvents, and transfer them to the mother liquor metering tank 201 quantitatively, and then transfer them to the synthesis kettle to realize the mother liquor configuration of multiple batches of solid raw materials in the dissolving kettle 101, improve the synthesis efficiency, and when the dissolving kettle 101 needs to be repaired, the mother liquor inside the dissolving kettle 101 can be transferred to the mother liquor metering tank 201 for continued production. There is no conflict between production and repair, and the efficiency is improved. The equipment has a simple structure, a reasonable process, and is easy to operate. The materials used are all standing materials, which are easy to implement, have low maintenance costs, and reflect great derivative economic value.

[0029] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A mother liquor metering device for polyolefin catalyst production, comprising a configuration component (1); characterized in that: The invention also includes a metering component (2); the configuration component (1) is a configuration component (1) used for dissolving raw materials in the production process of polyolefin catalysts, and the outer side of the configuration component (1) is installed with a metering component (2) for accurately measuring the flow rate and volume of the mother liquid to ensure that the correct proportion of raw materials is added during the production process, and the metering component (2) includes a mother liquid metering tank (201), a mother liquid transfer pipe (202), a connecting valve (203), a liquid inlet valve (204), a liquid level meter (205), a mother liquid outlet pipe (206), and a liquid outlet valve (207). 07), a delivery valve (208), a nitrogen pipe (209), a nitrogen valve (210), a metering tank empty pipe (211), a pipeline valve (212) and a merging valve (213), a mother liquor metering tank (201) is provided on the outer side of the dissolving kettle (101), a mother liquor transfer pipe (202) is provided on the outer end of the transmission pipe (106), a connecting valve (203) is provided on one end of the mother liquor transfer pipe (202) close to the transmission pipe (106), and a liquid inlet valve (204) is provided on one end of the mother liquor transfer pipe (202) close to the mother liquor metering tank (201).

2. The mother liquor metering device for polyolefin catalyst production according to claim 1, characterized in that: The configuration component (1) comprises a dissolving kettle (101), a feeding pipeline (102), a driving motor (103), a stirring frame (104), a regulating valve (105), a transmission pipe (106), a control valve (107), a mother liquor transfer filter bag (108), a delivery pipe (109), a mother liquor transfer valve (110), a venting pipe (111) and a venting valve (112). The upper end of the dissolving kettle (101) is provided with a feeding pipeline (102), the center of the upper end of the dissolving kettle (101) is provided with a driving motor (103), one end of the driving motor (103) is located inside the dissolving kettle (101) and is provided with a stirring frame (104), and the outer side of the driving motor (103) is provided with a feeding pipeline (102).

3. The mother liquor metering device for polyolefin catalyst production according to claim 2, characterized in that: A liquid outlet pipe is provided at the center of the lower end of the dissolving kettle (101), a regulating valve (105) is provided at one end of the liquid outlet pipe, a transmission pipe (106) is provided at the end of the regulating valve (105) away from the liquid outlet pipe, a control valve (107) is provided at one end of the transmission pipe (106), and two groups of mother liquid transfer filter bags (108) are provided at the lower end of the control valve (107).

4. The mother liquor metering device for polyolefin catalyst production according to claim 3, characterized in that: A vent pipe (111) is provided at the upper end of the dissolving kettle (101), a vent valve (112) is provided at one end of the vent pipe (111), and the vent pipe (111) passes through the dissolving kettle (101) and extends to the interior.

5. The mother liquor metering device for polyolefin catalyst production according to claim 1, characterized in that: A liquid outlet valve (207) is provided at the lower end of the mother liquid metering tank (201), a mother liquid outlet pipe (206) is provided at one end of the liquid outlet valve (207), a delivery valve (208) is provided at one end of the mother liquid outlet pipe (206) away from the liquid outlet valve (207), the mother liquid outlet pipe (206) is connected to the transmission pipe (106) through the delivery valve (208), and a liquid level meter (205) is provided on the outer wall of the mother liquid metering tank (201).

6. A mother liquor metering device for polyolefin catalyst production according to claim 5, characterized in that: A nitrogen pipe (209) is provided at the upper end of the mother liquid metering tank (201) on one side of the liquid inlet valve (204), a nitrogen valve (210) is provided at one end of the nitrogen pipe (209), a metering tank empty pipe (211) is provided on the outer side of the nitrogen pipe (209), a pipeline valve (212) is provided on the outer side of the metering tank empty pipe (211), the metering tank empty pipe (211) is connected to the vent pipe (111), a merging valve (213) is provided at the outer end of the metering tank empty pipe (211) close to the vent pipe (111), a remote pressure gauge is provided at the upper end of the mother liquid metering tank (201), and an on-site pressure gauge is provided on the outer wall of the mother liquid metering tank (201).

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