Hydrogen phosphide tail gas treatment device

Abstract

The utility model discloses a hydrogen phosphide tail gas treatment device. According to the technical scheme, the aluminum phosphide residual material recycling device comprises an air compression mechanism, a vacuum material suction mechanism, an aluminum phosphide residual material generation device, a fan circulation device and a control center. The air compression mechanism comprises an air compressor and a high-pressure air supply pipe connected with the air compressor; the vacuum material suction mechanism comprises a first vacuum material conveyor and a second vacuum material conveyor which are arranged in parallel, the aluminum phosphide residual material generation device comprises a first-stage reaction tank and a second-stage reaction tank which are connected in series, and the fan circulation device comprises a circulation fan communicated with the second-stage reaction tank; and the circulating fan is communicated with a circulating air duct system of a grain pile through a positive pressure end air inlet pipe and a return pipe. The scheme provided by the utility model is used for treating residual powder after deliquescence of aluminum phosphide for further thorough reaction, and poison gas after reaction is sent back to a grain pile for effective utilization.

Description

Technical Field

[0001] This utility model relates to the technical field of fumigation and pest control equipment for agricultural products such as grains, and in particular to a phosphine tail gas treatment device. Background Technology

[0002] Currently, the phosphine gas commonly used for fumigating and controlling pests in grains is generated by reacting water with powder containing 85% aluminum phosphide or tablets (pills) containing 56% aluminum phosphide. There are various methods for applying phosphine fumigation to medium and large-sized grain reserves in my country, but they generally fall into two categories: external application and internal application. Currently, both external and internal centralized fumigation techniques are not only time-consuming, labor-intensive, and costly in terms of pesticides and chemicals, but also pose numerous safety risks such as environmental pollution due to improper treatment of residues and exhaust gases, or toxic gas leaks, failing to achieve zero pollution and zero emissions. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the main purpose of this utility model is to provide a phosphine tail gas treatment device that can further and thoroughly react the residual powder after aluminum phosphide deliquescence, and send the toxic gas after reaction back to the grain pile for effective utilization.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a phosphine tail gas treatment device, comprising an air compression mechanism, a vacuum suction mechanism, an aluminum phosphide residue generating device, a fan circulation device, and a control center; the air compression mechanism includes an air compressor and a high-pressure air supply pipe connected to the air compressor; the vacuum suction mechanism includes a first vacuum conveyor and a second vacuum conveyor arranged in parallel, the first vacuum conveyor and the second vacuum conveyor being connected by a high-pressure air supply pipe and a high-pressure gas supply pipe, the first vacuum conveyor having a first inlet valve and a first outlet valve respectively on both sides, and the second vacuum conveyor having a second inlet valve and a first outlet valve respectively on both sides. The second vacuum conveyor is connected to a powder collection box for receiving residual powder, and a feed valve is provided between the powder collection box and the second vacuum conveyor. The aluminum phosphide residue generating device includes a primary reaction tank and a secondary reaction tank connected in series. The primary reaction tank is connected to a high-pressure gas pipeline, and the primary reaction tank and the secondary reaction tank are connected through a guide pipe. The fan circulation device includes a circulation fan connected to the secondary reaction tank. The circulation fan is connected to the circulation duct system of the grain pile through a positive pressure end air inlet pipe and a return pipe. The control center is electrically connected to the air compressor, the first vacuum conveyor, the second vacuum conveyor, the primary reaction tank, the secondary reaction tank, and all valves.

[0005] Preferably, the primary and secondary reaction vessels are further connected to an electric heater auxiliary device, and the control center is electrically connected to the electric heater auxiliary device.

[0006] Preferably, a pressure regulating valve is provided between the secondary reaction tank and the circulating fan.

[0007] Preferably, both the primary reaction vessel and the secondary reaction vessel are equipped with pressure gauges on their tops.

[0008] Preferably, both the primary reaction tank and the secondary reaction tank are provided with residual liquid discharge ports at the bottom.

[0009] Preferably, the control center is connected to a phosphine alarm device.

[0010] This invention offers the following advantages over existing technologies: it further ensures the complete reaction of residual aluminum phosphide powder after deliquescence, and effectively returns the reacted toxic gas to the grain pile for reuse. The entire phosphine tail gas treatment device can be externally mounted for convenient operation and management. The circulation system is fully integrated into the grain silo's ventilation system, facilitating daily operations such as sealing the grain storage facility and controlling air conditioning temperatures, thus better protecting national grain reserves. The fumigation residue undergoes harmless treatment, and the residual gas is returned to the grain pile, achieving zero toxic gas emissions, maximizing the utilization of the fumigant's efficacy, and reducing environmental pollution. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the phosphine tail gas treatment device of this utility model. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] like Figure 1 As shown, the phosphine tail gas treatment device D000 is mainly used to further and thoroughly react the residual powder after aluminum phosphide deliquescence, and to send the toxic gas after reaction back to the grain pile for effective utilization.

[0014] The phosphine tail gas treatment device D000 consists of a control center D026, an air compressor D003, a first vacuum feeder D004 and a second vacuum feeder D022, a high-pressure air supply pipe D001, a high-pressure gas supply pipe D019, a primary reaction tank D007, a secondary reaction tank D008 (also called a purification tank), a circulating fan D016, an air inlet pipe D012, a return pipe D015, and an electric heater auxiliary device D006.

[0015] The first vacuum conveyor D004 is installed at the bottom of the bottom cup of the phosphine generator. When the air compressor D003 is working and there is an air source, and the first inlet valve D027, the second outlet valve D020, and the feed valve D024 are all closed, while the second inlet valve D002 and the second outlet valve D021 are all open, the residual powder in the phosphine generator will be sucked in by the negative pressure of the vacuum conveyor D004 and sent to the first-stage reaction tank D007 through the high-pressure gas pipe D019. The toxic gas from the reaction tank D007 will enter the purification tank D008 through the guide pipe D017. Both of these reaction tanks are under high pressure. After being regulated by the pressure regulating valve D011, the gas directly enters the positive pressure end inlet pipe D012 of the circulating fan D016 and then enters the circulating air duct D013 system of the grain pile D014 to achieve fumigation and pest control. The negative pressure airflow at the top of the grain pile D014 is connected to the return pipe D015 and returns to the circulating fan D016, forming a closed loop for circulating fumigation, thereby achieving effective utilization of residual gas and reducing toxic gas emissions.

[0016] The second vacuum conveyor D022 is used for treating residual powder from the original fumigation of the grain silo. The powder collection box D023 is used to collect the residual powder, and its treatment process is similar to that of the residue treatment in this case. However, it requires closing the second inlet valve D002 and the second outlet valve D021, and opening the first inlet valve D027, the second outlet valve D020, and the feed valve D024 to perform residue treatment. Furthermore, the phosphine tail gas treatment device D000 can not only deeply treat the residual powder generated by this technology and equipment, but can also be used to treat the residual powder originally picked up by manual operation.

[0017] Both the primary reaction vessel D007 and the secondary reaction vessel D008 are equipped with pressure gauges D018 on their tops to prevent excessive pressure and ensure safe explosion. Both reaction vessels are equipped with residual liquid discharge ports D009 at their bottoms to facilitate the removal of residual liquid after the reaction. In this embodiment, an electric heater auxiliary device D006 is also added, which can improve the reaction speed and thoroughness of the drugs in the two vessels and minimize the toxicity of the residual liquid.

[0018] The control center D026 is the control center of the whole machine. It mainly controls the air compressor D003, two sets of vacuum feeders, two-stage reaction tanks and solenoid valves of each inlet and outlet air pipe, electric heater auxiliary device D006 and circulating fan D016. It also has a phosphine leak prevention alarm device D025 installed. Once a pipeline or joint leak occurs, the phosphine alarm device D025 can immediately sound an alarm to ensure safe use.

[0019] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A phosphine off-gas treatment device, characterized by: The system includes an air compression mechanism, a vacuum material feeding mechanism, an aluminum phosphide residue generating device, a fan circulation device, and a control center. The air compression mechanism includes an air compressor and a high-pressure air supply pipe connected to the air compressor. The vacuum material feeding mechanism includes a first vacuum conveyor and a second vacuum conveyor connected in parallel, connected by a high-pressure air supply pipe and a high-pressure gas supply pipe. The first vacuum conveyor has a first inlet valve and a first outlet valve on each side, and the second vacuum conveyor has a second inlet valve and a second outlet valve on each side. The second vacuum conveyor is connected to a... The powder collection box for receiving residual powder is equipped with a feed valve between the powder collection box and the second vacuum conveyor; the aluminum phosphide residual material generating device includes a primary reaction tank and a secondary reaction tank connected in series, the primary reaction tank is connected to a high-pressure gas pipeline, and the primary reaction tank and the secondary reaction tank are connected through a guide pipe; the fan circulation device includes a circulation fan connected to the secondary reaction tank, and the circulation fan is connected to the circulation duct system of the grain pile through a positive pressure end air inlet pipe and a return pipe; the control center is electrically connected to the air compressor, the first vacuum conveyor, the second vacuum conveyor, the primary reaction tank, the secondary reaction tank, and all valves.

2. A phosphine tail gas treatment apparatus according to claim 1, characterized in that: The primary and secondary reaction vessels are also connected to an electric heater auxiliary device, and the control center is electrically connected to the electric heater auxiliary device.

3. A phosphine tail gas treatment apparatus according to claim 1, wherein: A pressure regulating valve is installed between the secondary reaction tank and the circulating fan.

4. The phosphine tail gas treatment apparatus of claim 1, wherein: Both the primary and secondary reaction vessels are equipped with pressure gauges on their tops.

5. The phosphine tail gas treatment device according to claim 1, characterized in that: Both the primary and secondary reaction tanks are equipped with residual liquid discharge ports at their bottoms.

6. The phosphine tail gas treatment device according to claim 1, characterized in that: The control center is connected to a phosphine alarm device.

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