Flake caustic soda feeding system in mepiquat chloride production

Abstract

A caustic soda flake feeding system in mepiquat chloride production comprises a feeding bin, the bottom of the feeding bin is connected with a material conveying pipe, the material conveying pipe is provided with a horizontal section, the horizontal section of the material conveying pipe is bent upwards and then led upwards to be connected into the feeding bin, and a first air filter element is installed at the front end of the horizontal section of the material conveying pipe; a second air filter element is installed on a horizontal section behind the joint of the conical bottom and the conveying pipe, the upper portion of the feeding bin is closed, a vacuum Roots blower is connected to the feeding bin, a first pneumatic ball valve is installed at the lower end of the conical portion of the lower portion of the feeding bin, and a tee joint is connected to the lower portion of the first pneumatic ball valve; a feeding port of the tee joint is connected to a discharging port of the first pneumatic ball valve, a discharging port of the tee joint is connected to the two material flowing pipes, a flap valve is installed at the tee joint, the two material flowing pipes are connected to the second pneumatic ball valve and the third pneumatic ball valve respectively, and discharging ports of the second pneumatic ball valve and the third pneumatic ball valve correspond to the two reaction valves respectively. According to the system, feeding of the caustic soda flakes can be achieved after the caustic soda flakes are put into the feeding bin.

Description

TECHNICAL FIELD

[0001] The utility model relates to a methylnarcon production equipment, especially in methylnarcon production in piece alkali feeding system belongs to chemical equipment technical field. BACKGROUND

[0002] In a production process of methylnarcon (such as the method for preparing methylnarcon disclosed in CN2013100551442), piece alkali (sodium hydroxide) is needed, and the traditional feeding method is to manually add piece alkali into the reaction kettle, which has many disadvantages: first, because the organic matter added in the reaction kettle is harmful to human body, there is potential personal harm when the operator approaches the feeding; second, the feeding speed cannot be controlled, and generally it is poured into bags, because the addition of piece alkali will release heat, and if the addition speed is too fast, the heat release will be too large, making it difficult to control the temperature of the system; third, this feeding method is an exposed feeding method, and piece alkali dust will overflow to the surrounding environment during the feeding process, causing harm, and for this point, the relevant supervisory departments have been urging to improve, so how to avoid the above problems in the feeding of methylnarcon is a problem to be solved, although there are many piece alkali feeding schemes in Chinese patent applications, such as the piece alkali feeding device and piece alkali feeding method disclosed in CN202311350782.7 and the solid piece alkali feeding machine disclosed in CN209663231U, because the use occasions and the technical problems solved are different, they cannot be used in the production of methylnarcon, and they basically have no reference value for solving the problems existing in the feeding of piece alkali in the production of methylnarcon. SUMMARY

[0003] The utility model aims at overcoming the above-mentioned problems existing in the feeding of piece alkali in the current production of methylnarcon, and provides a piece alkali feeding system in the production of methylnarcon.

[0004] To achieve the purpose of this utility model, the following technical solution is adopted: A caustic soda flake feeding system in the production of methylphenidate includes a ground feeding station, wherein the ground feeding station includes a feeding silo with a feeding port and an opening / closing door. A dust collector is installed on the upper part of the feeding silo. The feeding silo is conical, and a conveying pipe is connected to the bottom of the cone. The conveying pipe has a horizontal section. The connection between the bottom of the cone and the conveying pipe is near the front end of the horizontal section of the conveying pipe. The horizontal section of the conveying pipe is bent upwards and then connected to the feeding silo. A first air filter is installed at the front end of the horizontal section of the conveying pipe. A second air filter is installed on the horizontal section after the connection between the bottom of the cone and the conveying pipe. The second air filter is installed on the top of the wall of the conveying pipe. The first air filter and the second air filter... The two air filters are connected to the outside. The upper part of the feeding hopper is closed, and a vacuum Roots blower is connected to the feeding hopper. The upper part of the feeding hopper is cylindrical, and the lower part is conical. A first pneumatic ball valve is installed at the lower end of the conical part. A three-way valve is connected to the lower part of the first pneumatic ball valve. The feed inlet of the three-way valve is connected to the discharge outlet of the first pneumatic ball valve, and the discharge outlet is connected to two flow pipes. The two flow pipes extend to the top of the two reactors respectively. A flap valve is installed at the three-way valve. The flap valve controls the discharge flow of the first pneumatic ball valve to different flow pipes. The two flow pipes are respectively connected to a second pneumatic ball valve and a third pneumatic ball valve. The discharge outlets of the second and third pneumatic ball valves correspond to the two reactors respectively. All the above-mentioned pneumatic ball valves and vacuum Roots blower are connected to the controller for control.

[0005] Furthermore, a filter is fixedly installed on the upper part of the feeding hopper, and the suction end of the vacuum Roots blower is connected to the filter.

[0006] Furthermore, pneumatic vibrators are installed on the feeding hopper, the loading hopper, and the two material flow pipes. The pneumatic vibrators are connected to a high-pressure air source and are controlled by a controller.

[0007] The positive and beneficial technical effects of this system are as follows: after the caustic soda flakes are put into the feeding hopper, the system can realize the feeding of caustic soda flakes, overcoming many problems caused by manual feeding. The specific implementation method will be described in detail. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0009] To more fully explain the implementation of this utility model, implementation examples are provided. These implementation examples are merely illustrative of this utility model and do not limit its scope.

[0010] The present invention will be further explained in detail with reference to the accompanying drawings, in which the following references are made: 1: feeding hopper; 2: dust collector; 3: opening and closing door; 4: first air filter element; 5: horizontal section; 6: second air filter element; 7: conveying pipe; 8: feeding hopper; 9: filter; 10: true fast Roots blower; 11: first pneumatic ball valve; 12: flap valve; 13: first flow pipe; 14: second flow pipe; 15: pneumatic vibrator; 16: third pneumatic ball valve; 17: second pneumatic ball valve; 18: second reaction vessel; 19: first reaction vessel.

[0011] As shown in the attached diagram, a caustic soda flake feeding system for mepiquat chloride production includes a ground-based feeding station. The ground-based feeding station includes a feeding silo 1 with a feeding port and an opening / closing door 3. The opening / closing door has various forms in the prior art. A dust collector 2 is installed on the upper part of the feeding silo. The feeding silo is conical, and a conveying pipe 7 is connected to the bottom of the cone. The conveying pipe has a horizontal section 5. The connection between the bottom of the cone and the conveying pipe is near the front end of the horizontal section. The horizontal section of the conveying pipe is bent upwards and then connected to an upper feeding silo 8. A first air filter element 4 is installed at the front end of the horizontal section of the conveying pipe, and a second air filter element 6 is installed on the horizontal section after the connection between the conical bottom and the conveying pipe. The second air filter element 6 is installed on the top of the conveying pipe wall. The first air filter element and the second air filter element are in communication with the outside. The upper part of the feeding hopper 8 is closed, and a vacuum Roots blower 10 is connected to the feeding hopper. In this embodiment, a filter 9 is fixedly installed on the upper part of the feeding hopper, and the suction end of the vacuum Roots blower is connected to the filter, which can prevent dust from entering the vacuum Roots blower. The upper part of the feeding hopper is cylindrical, and the lower part is conical. A first pneumatic ball valve 11 is installed at the lower end of the conical part. A three-way valve is connected to the lower part of the first pneumatic ball valve. The feed of the three-way valve is connected to the discharge of the first pneumatic ball valve, and the discharge is connected to two flow pipes, namely the first flow pipe 13 and the second flow pipe 14. The first flow pipe extends to the top of the first reactor 19, and the second flow pipe extends to the top of the second reactor 18. A flap valve 12 is installed at the three-way valve. The flap valve controls the discharge of the first pneumatic ball valve to flow to the first flow pipe or the second flow pipe. A second pneumatic ball valve 17 is connected to the first flow pipe, and a third pneumatic ball valve 16 is connected to the second flow pipe. The discharges of the second and third pneumatic ball valves correspond to the first reactor valve and the second reactor, respectively. All the above-mentioned pneumatic ball valves and vacuum Roots blowers are connected to the controller. In this embodiment, pneumatic vibrators are installed on the feeding hopper, the loading hopper, and the two material flow pipes. The pneumatic vibrators are connected to a high-pressure air source and are controlled by a controller. During operation, the pneumatic vibrators can effectively prevent material blockage.

[0012] When the system is in operation, the first pneumatic ball valve closes, the vacuum Roots blower starts, and caustic soda flakes are added to the feeding hopper through the feeding port. The caustic soda flakes enter the horizontal section from the bottom of the feeding hopper. Under the suction of the vacuum Roots blower, air flows through the first and second air filters into the feeding hopper, carrying the caustic soda flakes into the feeding hopper. This process continuously delivers caustic soda flakes to the feeding hopper. After the material in the feeding hopper has been delivered, the vacuum Roots blower stops. If material is added to the first reactor, the first pneumatic ball valve and the flap valve are opened to close the second feed pipe channel, and the second electric ball valve is opened, allowing the material (caustic soda flakes) to fall into the first reactor. If material is added to the second reactor, the first pneumatic ball valve and the flap valve are opened to close the first feed pipe channel, and the third electric ball valve is opened, allowing the material (caustic soda flakes) to fall into the second reactor. This system can be operated in conjunction with manual inspection and monitoring.

[0013] After a detailed description of the embodiments of this utility model, those skilled in the art will clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent applications. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the scope of the technical solution of this utility model, and this utility model is not limited to the embodiments of the examples given in the specification.

Claims

1. A caustic soda flake feeding system for the production of mepiquat chloride, comprising a ground feeding station, wherein the ground feeding station includes a feeding silo, the feeding silo has a feeding port, the feeding port has an opening and closing door, and a dust collector is installed on the upper part of the feeding silo, characterized in that: The feeding hopper is conical, with a conveying pipe connected to the bottom of the cone. The conveying pipe has a horizontal section, and the connection between the bottom of the cone and the conveying pipe is near the front end of the horizontal section. The horizontal section of the conveying pipe is bent upwards and then led upwards to the feeding hopper. A first air filter is installed at the front end of the horizontal section of the conveying pipe, and a second air filter is installed on the horizontal section after the connection between the bottom of the cone and the conveying pipe. The second air filter is installed on the top of the conveying pipe wall. The first and second air filters are in communication with the outside. The upper part of the feeding hopper is closed, and a vacuum Roots blower is connected to the feeding hopper. The upper part of the feeding hopper is circular. The cylindrical section and the lower section are conical. A first pneumatic ball valve is installed at the lower end of the conical section. A three-way valve is connected to the first pneumatic ball valve. The feed inlet of the three-way valve is connected to the discharge outlet of the first pneumatic ball valve, and the discharge outlet is connected to two flow pipes. The two flow pipes extend to the top of the two reactors respectively. A flap valve is installed at the three-way valve. The flap valve controls the discharge flow of the first pneumatic ball valve to different flow pipes. The two flow pipes are respectively connected to a second pneumatic ball valve and a third pneumatic ball valve. The discharge outlets of the second and third pneumatic ball valves correspond to the two reaction valves respectively. All the above-mentioned pneumatic ball valves and vacuum Roots blowers are connected to the controller for control.

2. The caustic soda flake feeding system in the production of mepiquat chloride according to claim 1, characterized in that: A filter is fixedly installed at the top of the feeding hopper, and the suction end of the vacuum Roots blower is connected to the filter.

3. The caustic soda flake feeding system in the production of mepiquat chloride according to claim 1, characterized in that: Pneumatic vibrators are installed on the feeding hopper, the loading hopper, and the two material flow pipes. The pneumatic vibrators are connected to a high-pressure air source and are controlled by a controller.

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