Acid-base adjusting system for chlorfenapyr preparation

Abstract

The utility model discloses an acid-base adjusting system for chlorfenapyr preparation, which comprises an adjusting kettle, one side of the top of the adjusting kettle is connected with the bottom of a washing kettle through an input pipe, the other side of the top of the adjusting kettle is connected with the bottom of a liquid alkali kettle through an alkali liquor adding pipe, and the bottom of the adjusting kettle is connected with the top of a distillation kettle through an output pipe; a bidirectional delivery pump is mounted in the input pipe and the output pipe, the bidirectional delivery pump is fixedly mounted on the outer wall of the adjusting kettle through a support, the bidirectional delivery pump comprises two pump bodies which are symmetrically arranged in the vertical direction, the two pump bodies are fixedly mounted on the upper side and the lower side of the direct current motor, the upper pump body is connected into the input pipe, and the lower pump body is connected into the output pipe. According to the acid-base adjusting system for chlorfenapyr preparation, accurate acid-base adjustment of washing wastewater is achieved, pumping-in and pumping-out of the wastewater are controlled by the same pump, the whole acid-base adjusting system is compact in structure, and control difficulty and equipment cost are reduced.

Description

Technical Field

[0001] The utility model relates to an acid-base regulating system for preparing chlorfenapyr, belonging to the technical field of acid-base regulating. Background Art

[0002] Chlorfenapyr, also known as chlorfenapyr, is a white crystalline powder. It is a highly effective and low-toxic insecticide with both stomach poison and contact killing effects. It has strong penetration on the leaf surface, a certain systemic effect, and has the characteristics of a wide insecticide spectrum, high prevention effect, long-lasting effect, and safety.

[0003] Chlorfenapyr is produced by a condensation reaction of raw materials bromopyrrolecarbonitrile and chloromethyl ether with toluene as solvent and triethylamine as acid-binding agent. During the production process of chlorfenapyr, the crude product needs to be washed with water. The wastewater generated by the washing needs to be added with alkali to adjust the pH value and then distilled to recover triethylamine.

[0004] However, the existing acid-base regulating kettle needs to be equipped with at least two delivery pumps, which are used to pump wastewater into and out of the regulating kettle respectively. This not only makes the overall structural layout not compact, increases the control difficulty, but also is not conducive to reducing equipment costs.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] In view of the deficiencies in the background technology, the utility model provides an acid-base regulating system for preparing chlorfenapyr, which realizes the precise acid-base regulation of washing wastewater. The pumping in and out of the wastewater is controlled by the same pump, so that the overall acid-base regulating system is compact in structure and the control difficulty and equipment cost are reduced.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] The acid-base regulating system for preparing chlorfenapyr comprises a regulating kettle, wherein one side of the top of the regulating kettle is connected to the bottom of a water washing kettle through an input pipe, the other side of the top of the regulating kettle is connected to the bottom of a liquid alkali kettle through an alkali liquid adding pipe, and the bottom of the regulating kettle is connected to the top of a distillation kettle through an output pipe;

[0009] A bidirectional delivery pump is installed in the input pipe and the output pipe, and the bidirectional delivery pump is fixedly installed on the outer wall of the regulating kettle through a bracket;

[0010] The bidirectional delivery pump comprises two pump bodies symmetrically arranged in the vertical direction. The two pump bodies are fixedly mounted on the upper and lower sides of the DC motor, and the upper pump body is connected to the input pipe, and the lower pump body is connected to the output pipe.

[0011] Furthermore, the pump body is provided with a pump cavity inside, and a suction port and a discharge port are provided on both sides of the pump cavity. The suction port and the discharge port of the upper pump body are connected to the input pipe, and the suction port and the discharge port of the lower pump body are connected to the output pipe.

[0012] Furthermore, a pump shaft is passed through the pump cavity, and a pair of inner and outer rotors are installed on the pump shaft; the end of the pump shaft is connected to the output shaft of the DC motor through a slot, and the DC motor is provided with a dual output shaft.

[0013] Furthermore, an input valve is installed on the input pipe, and the input valve is located between the water washing kettle and the bidirectional delivery pump.

[0014] Furthermore, an output valve is installed on the output pipe, and the output valve is located between the regulating kettle and the bidirectional delivery pump.

[0015] Furthermore, a flow meter and an electric regulating valve are installed on the alkali solution adding pipe.

[0016] Furthermore, a pH online monitor is installed at the bottom of the inner cavity of the regulating kettle, and the pH online monitor is connected to the input interface of the PLC control module. The output interface of the PLC control module is also electrically connected to the bidirectional delivery pump, input valve, output valve and electric regulating valve.

[0017] Furthermore, a stirring blade is installed in the inner cavity of the regulating kettle.

[0018] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0019] The utility model realizes accurate acid-base regulation of washing wastewater. The bidirectional delivery pump in the utility model can not only pump the wastewater in the washing kettle into the regulating kettle, but also pump the wastewater with acid-base regulation in the regulating kettle into the distillation kettle. One pump completes the work of two pumps, making the overall structural layout more compact and reducing the control difficulty and equipment cost of the acid-base regulation system.

[0020] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the installation of a bidirectional delivery pump.

[0024] In the figure, 1-regulating kettle, 2-water washing kettle, 3-liquid alkali kettle, 4-distillation kettle, 5-input pipe, 6-alkali solution adding pipe, 7-output pipe, 8-bidirectional delivery pump, 81-DC motor, 82-pump body, 83-inner and outer rotors, 84-pump shaft, 9-input valve, 10-output valve, 11-flow meter, 12-electric regulating valve, 13-pH online monitor, 14-stirring blades, 15-bracket. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings.

[0026] like Figure 1-Figure 3 As shown together, the utility model provides an acid-base regulating system for preparing chlorfenapyr, including a regulating kettle 1, wherein one side of the top of the regulating kettle 1 is connected to the bottom of a water washing kettle 2 through an input pipe 5, the other side of the top of the regulating kettle 1 is connected to the bottom of a liquid alkali kettle 3 through an alkali solution adding pipe 6, and the bottom of the regulating kettle 1 is connected to the top of a distillation kettle 4 through an output pipe 7.

[0027] A bidirectional delivery pump 8 is installed in the input pipe 5 and the output pipe 7. The bidirectional delivery pump 8 is fixedly installed on the outer wall of the regulating kettle 1 through a bracket 15. The bidirectional delivery pump 8 can pump the wastewater generated by the washing kettle 2 into the regulating kettle 1, and can also pump the wastewater with pH adjusted in the regulating kettle 1 into the distillation kettle 4.

[0028] The bidirectional delivery pump 8 includes two pump bodies 82 symmetrically arranged in the vertical direction. The two pump bodies 82 are fixedly installed on the upper and lower sides of the DC motor 81, and the upper pump body 82 is connected to the input pipe 5, and the lower pump body 82 is connected to the output pipe 7.

[0029] The pump body 82 is provided with a pump cavity inside, and a suction port and a discharge port are provided on both sides of the pump cavity. The suction port and the discharge port of the upper pump body 82 are connected to the input pipe 5, and the suction port and the discharge port of the lower pump body 82 are connected to the output pipe 7.

[0030] A pump shaft 84 is passed through the pump cavity, and a pair of inner and outer rotors 83 are installed on the pump shaft 84; the end of the pump shaft 84 is connected to the output shaft of the DC motor 81 through a slot, and the DC motor 81 is provided with a double output shaft.

[0031] The DC motor 81 synchronously drives the two pairs of inner and outer rotors 83 to rotate, providing power for liquid pumping. When the DC motor 81 drives the upper inner and outer rotors 83 to pump liquid, the lower inner and outer rotors 83 are in an idling state. When the DC motor 81 drives the lower inner and outer rotors 83 to pump liquid, the upper inner and outer rotors 83 are in an idling state.

[0032] An input valve 9 is installed on the input pipe 5 , and the input valve 9 is located between the water washing kettle 2 and the bidirectional delivery pump 8 .

[0033] The output pipe 7 is provided with an output valve 10 , and the output valve 10 is located between the regulating kettle 1 and the bidirectional delivery pump 8 .

[0034] The alkali solution adding pipe 6 is installed with a flow meter 11 and an electric regulating valve 12 .

[0035] A stirring blade 14 is installed in the inner cavity of the regulating kettle 1, and the alkali solution can be quickly and evenly mixed during the rotation of the stirring blade 14.

[0036] A pH online monitor 13 is installed at the bottom of the inner cavity of the regulating kettle 1. The pH online monitor 13 is connected to the input interface of the PLC control module. The output interface of the PLC control module is also electrically connected to the bidirectional delivery pump 8, the input valve 9, the output valve 10 and the electric regulating valve 12.

[0037] The specific working principle of this utility model:

[0038] First, the output valve 10 is closed and the input valve 9 is opened, and the waste water generated by the washing kettle 2 is pumped into the regulating kettle 1 by the action of the upper pump body 82 of the two-way delivery pump 8; then the liquid alkali with a concentration of 32% in the liquid alkali kettle 3 is accurately measured and delivered to the regulating kettle 1 through the alkali solution adding pipe 6, and the pH value of the waste water in the regulating kettle 1 is adjusted to 10-11; after the pH value of the waste water is adjusted, the input valve 9 and the electric regulating valve 12 are closed, and the output valve 10 is opened, and the waste water after the pH value adjustment is completed is pumped into the distillation kettle 4 by the action of the lower pump body 82 of the two-way delivery pump 8, and the temperature in the distillation kettle 4 is controlled to be 100-105°C, thereby recovering triethylamine.

[0039] The bidirectional delivery pump 8 in the utility model can not only pump the waste water in the washing kettle 2 into the regulating kettle 1, but also pump the waste water with pH adjusted in the regulating kettle 1 into the distillation kettle 4. One pump completes the work of two pumps, making the overall structural layout more compact and reducing equipment costs.

[0040] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. Acid-base regulating system for preparing chlorfenapyr, characterized in that: The regulating kettle (1) comprises a top side of the regulating kettle (1) connected to the bottom of a water washing kettle (2) via an input pipe (5), the top side of the regulating kettle (1) connected to the bottom of a liquid alkali kettle (3) via an alkali liquid addition pipe (6), and the bottom of the regulating kettle (1) connected to the top of a distillation kettle (4) via an output pipe (7); A bidirectional delivery pump (8) is installed in the input pipe (5) and the output pipe (7), and the bidirectional delivery pump (8) is fixedly mounted on the outer wall of the regulating kettle (1) via a bracket (15); The bidirectional delivery pump (8) comprises two pump bodies (82) symmetrically arranged in a vertical direction, the two pump bodies (82) being fixedly mounted on upper and lower sides of a DC motor (81), the upper pump body (82) being connected to an input pipe (5), and the lower pump body (82) being connected to an output pipe (7).

2. The acid-base regulating system for preparing chlorfenapyr according to claim 1, characterized in that: The pump body (82) is provided with a pump cavity inside, and a liquid suction port and a liquid discharge port are provided on both sides of the pump cavity. The liquid suction port and the liquid discharge port of the upper pump body (82) are connected to the input pipe (5), and the liquid suction port and the liquid discharge port of the lower pump body (82) are connected to the output pipe (7).

3. The acid-base regulating system for preparing chlorfenapyr according to claim 2, characterized in that: A pump shaft (84) is passed through the pump cavity, and a pair of inner and outer rotors (83) are mounted on the pump shaft (84); the end of the pump shaft (84) is connected to the output shaft of the DC motor (81) via a slot, and the DC motor (81) is provided with a double output shaft.

4. The acid-base regulating system for preparing chlorfenapyr according to claim 1, characterized in that: An input valve (9) is installed on the input pipe (5), and the input valve (9) is located between the water washing kettle (2) and the bidirectional delivery pump (8).

5. The acid-base regulating system for preparing chlorfenapyr according to claim 4, characterized in that: An output valve (10) is installed on the output pipe (7), and the output valve (10) is located between the regulating kettle (1) and the bidirectional delivery pump (8).

6. The acid-base regulating system for preparing chlorfenapyr according to claim 5, characterized in that: A flow meter (11) and an electric regulating valve (12) are installed on the alkali solution addition pipe (6).

7. The acid-base regulating system for preparing chlorfenapyr according to claim 6, characterized in that: A pH online monitor (13) is installed at the bottom of the inner cavity of the regulating kettle (1). The pH online monitor (13) is connected to the input interface of the PLC control module. The output interface of the PLC control module is also electrically connected to the bidirectional delivery pump (8), the input valve (9), the output valve (10) and the electric regulating valve (12).

8. The acid-base regulating system for preparing chlorfenapyr according to claim 1, characterized in that: A stirring blade (14) is installed in the inner cavity of the regulating kettle (1).

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