Buried tank liquid pumping system in pesticide production

Abstract

A buried tank liquid pumping system in pesticide production comprises a buried tank, a feeding pipe and a discharging pipe are connected to the buried tank, an inlet of the discharging pipe is close to the bottom of the buried tank, the discharging pipe is connected to an intermediate tank, the bottom of the intermediate tank is connected to a liquid pump through a pipeline, the liquid pump is connected to a process end through a pipeline, and the process end is connected to the buried tank through a pipeline. An emptying valve is installed on the upper portion of the intermediate tank, a liquid level meter is installed on the intermediate tank, a high-pressure nitrogen pipeline is connected to the buried tank, a valve is connected to the high-pressure nitrogen pipeline, and an outlet of the high-pressure nitrogen pipeline is located at the upper end in the buried tank. The system solves the problem that liquid in the buried tank is difficult to convey due to insufficient suction of the pump.

Description

TECHNICAL FIELD

[0001] The utility model relates to pesticide production equipment, especially in the pesticide production buried tank liquid pump pumping system belongs to chemical equipment technical field. BACKGROUND

[0002] In the production of pesticides, a variety of liquid raw materials are used, such as methopromine production needs liquid methanol, piperidine, these raw materials are stored in liquid tank after arrival, then through the liquid pump to the process flow end, the liquid tank in the past is located on the ground, and the volume is large, for example, the volume capacity of the liquid tank used by the applicant is 40 cubic meters, since the liquid tank is located on the ground, there is a great security risk, in order to meet the requirements of safety supervision, the liquid tank is buried underground, the buried depth is below 3.5 meters, after burying, it is connected to the liquid pump through the pumping pipe for conveying, after burying, a problem is found, the original liquid pump model can extract the theoretical depth (pump suction) of about 4 meters, since the port of the pumping pipe is located at the bottom of the liquid tank, so the pumping depth is about 3.5 meters, although it is within the theoretical depth of the liquid pump extraction, but since there is a longer horizontal part on the pumping pipe, so the liquid pump is difficult to extract the raw material liquid in the buried tank through the pumping pipe and convey it to the process end, in order to overcome this problem, the applicant has tried to use a larger type of liquid conveying pump, although this way can extract the liquid in the buried tank, but it is found that since the conveying capacity of the larger type of liquid pump is correspondingly stronger, the liquid flow control at the process end becomes very difficult, and basically cannot be accurately controlled, so solving the above problem after burying the liquid tank is a research topic. SUMMARY

[0003] The utility model aims at overcoming the above problem after burying the liquid tank in the pesticide production, and provides a buried tank liquid pump pumping system in the pesticide production.

[0004] In order to achieve the purpose of the utility model, the following technical scheme is adopted: the buried tank liquid pump pumping system in the pesticide production, including buried tank, the inlet pipe, the discharge pipe are connected on the buried tank, the inlet of the discharge pipe is close to the bottom of the buried tank, the discharge pipe is connected to the intermediate tank, the bottom of the intermediate tank is connected to the liquid pump through the pipeline, the liquid pump is connected to the process end through the pipeline, the emptying valve is installed on the upper part of the intermediate tank, the liquid level meter is installed on the intermediate tank, the high pressure nitrogen gas pipeline is connected on the buried tank, the valve is connected on the high pressure nitrogen gas pipeline, the outlet of the high pressure nitrogen gas pipeline is located in the upper end of the buried tank.

[0005] Further, the discharge pipe is connected to the upper half of the intermediate tank.

[0006] Further, the emptying valve is a one-way valve.

[0007] The positive friendship technical effect of the utility model lies in: the system solves the problem that the liquid of the buried tank is difficult to transport due to insufficient suction of the pump, and is specifically and in detail explained in combination with the specific embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is the schematic view of the utility model. DETAILED DESCRIPTION

[0009] In order to more fully explain the implementation of the utility model, the implementation examples of the utility model are provided. These implementation examples are only the elaboration of the utility model and do not limit the scope of the utility model.

[0010] The utility model is further explained in detail in combination with the drawings, and the various marks in the drawings are as follows: 1: buried tank; 2: feed pipe; 3: valve; 4: high-pressure nitrogen pipeline; 5: intermediate tank; 6: emptying valve; 7: liquid pump; 8: discharge pipe.

[0011] As shown in the drawings, the buried tank liquid pump extraction system in pesticide production comprises a buried tank 1, in the embodiment, the buried tank is 40 cubic meters in capacity, a feed pipe 2 and a discharge pipe 8 are connected to the buried tank, the inlet of the discharge pipe is close to the bottom of the buried tank, the discharge pipe is connected to an intermediate tank 5, in the embodiment, the discharge pipe is connected to the upper half of the intermediate tank, in the embodiment, the capacity of the intermediate tank can be 0.6 cubic meters, the bottom of the intermediate tank 5 is connected to a liquid pump 7 through a pipeline, the liquid pump 7 is connected to a process end through a pipeline, an emptying valve 6 is installed on the upper part of the intermediate tank, in the embodiment, a liquid level meter is installed on the intermediate tank, a high-pressure nitrogen pipeline 4 is connected to the buried tank, a valve 3 is connected to the high-pressure nitrogen pipeline, and the outlet of the high-pressure nitrogen pipeline is located in the upper end of the buried tank.

[0012] When the system extracts liquid materials from the buried tank, first, the emptying valve is opened, then the valve 3 of the high-pressure nitrogen is opened, and the liquid materials in the buried tank can be pressed into the intermediate tank by using less than 2 kg of pressure, when the materials in the intermediate tank reach the set liquid level, the emptying valve is closed (if it is a one-way valve, it does not need to be closed), the liquid pump is opened to transport the materials in the intermediate tank to the process end, as the liquid level in the intermediate tank decreases, the pressure in the space above it will decrease, forming a vacuum, under the action of the vacuum, the raw liquid in the buried tank will be continuously sucked into the intermediate tank, realizing the transportation process from the buried tank to the intermediate tank and then to the process end through the liquid pump.

[0013] After the embodiments of the present application are described in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above application, and any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments all belong to the scope of the technical scheme of the present application, and the present application is not limited to the implementation modes of the examples shown in the specification.

Claims

1. A liquid pumping system for underground tanks in pesticide production, comprising an underground tank, an inlet pipe and an outlet pipe connected to the underground tank, wherein the inlet of the outlet pipe is located near the bottom of the underground tank, characterized in that: The discharge pipe is connected to the intermediate tank. The bottom of the intermediate tank is connected to the liquid pump through a pipeline. The liquid pump is connected to the process end through a pipeline. An air vent valve is installed on the upper part of the intermediate tank. A level gauge is installed on the intermediate tank. A high-pressure nitrogen pipeline is connected to the underground tank. The outlet of the high-pressure nitrogen pipeline is located at the upper end of the underground tank.

2. The underground tank liquid pumping system for pesticide production according to claim 1, characterized in that: The discharge pipe is connected to the upper part of the intermediate tank.

3. The underground tank liquid pumping system for pesticide production according to claim 1, characterized in that: The aforementioned vent valve is a one-way valve.

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