Hydrogen peroxide continuous reaction preparation device for agricultural drip irrigation

Abstract

The utility model provides a hydrogen peroxide continuous reaction preparation device for agricultural drip irrigation, which is provided with a shell, a plurality of electrolysis units connected in series and an electrolyte pipeline penetrating through the electrolysis units connected in series are arranged in the shell, and cathodes of the electrolysis units are connected with a hydrogen collecting device; the inlet end of the electrolyte pipeline is connected with a liquid storage tank for storing an electrolyte solution, and the outlet end is used as a nozzle for spraying the electrolyte solution and hydrogen peroxide. The device can be used for continuously producing hydrogen peroxide with high yield, does not need separation treatment, can be used for agricultural drip irrigation together with electrolyte, and can be used for disinfecting soil while providing nutrients for crops. In addition, hydrogen peroxide can be continuously produced in situ, so that potential safety hazards in the transportation and storage process of hydrogen peroxide are avoided; the produced hydrogen peroxide does not need to use a stabilizer, so that secondary pollution of the hydrogen peroxide stabilizer to crops is avoided; in addition, hydrogen can be produced and stored at the same time and can be used as green energy to be applied to other fields.

Description

Technical field:

[0001] The utility model relates to the technical field of agricultural irrigation, in particular to a hydrogen peroxide continuous reaction preparation device for agricultural drip irrigation. Background technology:

[0002] Agriculture, as the primary industry, provides food and clothing for human society and is the foundation of the national economy. Irrigation and fertilization are the most important guarantees in agricultural production. At present, there are various plant diseases and insect pests in agricultural production, especially in the production of vegetables and fruits. At the same time, simple flood irrigation and floods cause plant root rot, which seriously affects the yield and quality of crops. In order to eliminate pests and diseases, a large amount of pesticides are usually used, causing environmental pollution, crop pollution and pesticide residue problems. On the other hand, irrigation and fertilization are generally carried out separately, which increases costs and causes waste of resources. In order to save costs, reduce diseases, reduce pollution, and increase crop yields, it is necessary to develop technical equipment that can carry out irrigation and fertilization at the same time. Summary of the invention:

[0003] In view of the above problems, the utility model provides a hydrogen peroxide continuous reaction preparation device for agricultural drip irrigation.

[0004] The technical solution of the utility model is as follows:

[0005] A hydrogen peroxide continuous reaction preparation device for agricultural drip irrigation, characterized in that: it has a shell, in which a plurality of electrolytic units connected in series are arranged, and an electrolyte pipeline passing through the electrolytic units connected in series; each electrolytic unit has an anode terminal plate, an anode catalyst material, a proton exchange membrane, a cathode catalyst material and a cathode terminal plate arranged in sequence, and the electrolyte pipeline passes through the anode catalyst material and the cathode catalyst material inside each electrolytic unit in turn; the cathode catalyst material of the electrolytic unit is connected to a hydrogen collection device; the electrolyte pipeline is connected to a liquid storage tank for storing electrolyte solution and a pump for delivering electrolyte solution at the inlet end before entering the first electrolytic unit, and the electrolyte pipeline extends out of the shell at the outlet end after the last electrolytic unit to serve as a nozzle for spraying electrolyte solution and hydrogen peroxide.

[0006] Furthermore, the cathode and anode catalyst materials are surrounded by cathode and anode drainage plates respectively; the proton exchange membrane is surrounded by a sealing frame;

[0007] The anode terminal plate, anode drain plate (and the anode catalytic material in the center), sealing frame (and the proton exchange membrane in the center), cathode drain plate (and the cathode catalytic material in the center) and cathode terminal plate in the electrolysis unit are tightly fitted in sequence, and all five are provided with through holes for allowing the electrolyte solution to flow through the anode catalytic material and the cathode catalytic material in sequence, thereby forming an electrolyte conduit in the electrolysis unit.

[0008] Furthermore, the hydrogen collection device includes a gas pipeline and a gas storage tank; one end of the gas pipeline is connected to the gas storage tank, and the other end is connected to the cathode catalytic material of each electrolysis unit in the form of a branch pipeline.

[0009] Furthermore, the outlet end of the electrolyte pipeline extending out of the shell is connected to an automatic diluter, and the automatic diluter is connected to a nozzle for spraying electrolyte solution and hydrogen peroxide; a gas dehydrator is also provided on the gas pipeline at the inlet end of the gas storage tank.

[0010] Furthermore, the branch pipelines of the gas pipeline connected to the cathode catalyst material are all provided with automatic exhaust valves; the gas pipeline at the inlet end of the gas dehydrator is also provided with an intake valve that can control the gas flow; and the outlet end of the pump is provided with a control valve that can control the liquid flow.

[0011] Furthermore, the cathode and anode catalytic materials of the electrolysis unit are both mesh structures, on which catalysts are loaded.

[0012] Furthermore, an insulating layer is provided between the two ends of the shell and the series-connected electrolytic units inside the shell.

[0013] Furthermore, the anode terminal plate, the anode drain plate, the sealing frame, the cathode drain plate and the cathode terminal plate are all provided with limiting screw holes.

[0014] Preferably, the cathode and anode catalytic material areas of the electrolysis unit are 0.1 to 1 m 2 , the number of the electrolysis units is 3 to 50.

[0015] Preferably, the cathode catalyst material is a noble metal, a transition metal or a graphite material, which has good corrosion resistance and stability; the anode catalyst material is a metal oxide, a stannate or a bismuthate.

[0016] More preferably, the noble metal is Pt, Pd, Rh or Ru; the transition metal is Ti, Ni or Ag; the metal oxide is tin oxide, tungsten oxide or zinc oxide; the stannate is calcium stannate, magnesium stannate, zinc stannate, barium stannate and strontium stannate; and the vanadate is bismuth vanadate.

[0017] Beneficial effects of the utility model:

[0018] 1) The utility model is an integrated continuous reaction device with multiple electrolytic units connected in series, which can continuously produce hydrogen peroxide in high yield. The produced hydrogen peroxide does not need to be separated and can be used for agricultural drip irrigation together with electrolytes. It can provide sufficient nutrition to crops, maintain soil fertility and disinfect the soil at the same time, so as to prevent diseases and insect pests, plant root rot and improve the resistance of crop roots.

[0019] 2) The utility model can continuously produce hydrogen peroxide in situ, thus avoiding potential safety hazards during the transportation and storage of hydrogen peroxide; and the hydrogen peroxide produced by the utility model does not require the use of a stabilizer, thus avoiding secondary contamination of crops by the hydrogen peroxide stabilizer.

[0020] 3) The utility model can simultaneously produce and store hydrogen, and can be applied to other fields as a green energy source. Description of the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0022] Figure 2 It is a structural schematic diagram of the electrolytic unit of the utility model, and the direction indicated by the arrow in the electrolyte pipeline 11 in the figure is the flow direction of the electrolyte solution or hydrogen peroxide. Specific implementation method:

[0023] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] like Figure 1 As shown, the utility model is a hydrogen peroxide continuous reaction preparation device for agricultural drip irrigation, which has a shell 16, in which 10 electrolytic units connected in series are arranged, and an electrolyte pipeline 11 passing through the electrolytic units connected in series; an insulating layer 17 is arranged between the shell 16 and the electrolytic units connected in series inside it.

[0026] like Figure 2 As shown, each electrolysis unit has an anode terminal plate 1, an anode catalyst material 3, a proton exchange membrane 5, a cathode catalyst material 6 and a cathode terminal plate 8 arranged in sequence, and the electrolyte pipeline 11 passes through the anode catalyst material 3 and the cathode catalyst material 6 in each electrolysis unit in sequence. The cathode catalyst material 6 and the anode catalyst material 3 of the electrolysis unit are both block-shaped (circular or rectangular in cross section, rectangular in this embodiment); a surrounding cathode drain plate 7 is provided around the cathode catalyst material 6, and a surrounding anode drain plate 2 is provided around the anode catalyst material 3, and the thickness of the drain plate is consistent with that of the catalyst material; the drain plate not only plays a role in draining the electrolyte solution, but also plays a role in fixing the catalyst material in the center, and also plays a role in sealing the electrolyte solution flowing in the catalyst material.

[0027] The proton exchange membrane 5 is surrounded by a surrounding sealing frame 4; the anode terminal plate 1, the anode drain plate 2 (and the anode catalytic material 3 in the center), the sealing frame 4 (and the proton exchange membrane 5 in the center), the cathode drain plate 7 (and the cathode catalytic material 6 in the center) and the cathode terminal plate 8 in the electrolysis unit are tightly fitted in sequence, and the anode terminal plate 1, the anode drain plate 2, the sealing frame 4, the cathode drain plate 7 and the cathode terminal plate 8 are all provided with through holes for the electrolyte solution to flow through the anode catalytic material 3 and the cathode catalytic material 6 in sequence, thereby forming an electrolyte conduit 11 in the electrolysis unit.

[0028] Figure 2 A more reasonable hole opening method is provided: in a tightly fitted state, a through hole is opened below the anode terminal plate 1 and the anode drain plate 2 for allowing the electrolyte solution to flow into the anode catalyst material 3, a through hole is opened above the anode drain plate 2, the sealing frame 4 and the cathode drain plate 7 for allowing the electrolyte solution to flow out of the anode catalyst material 3 and flow into the cathode catalyst material 6, and a through hole is opened below the cathode drain plate 7 and the cathode terminal plate 8 for allowing the electrolyte solution to flow out of the cathode catalyst material 6, thereby forming a pipe section of the electrolyte pipeline 11 in the electrolysis unit.

[0029] The anode terminal plate 1, the anode drain plate 2, the sealing frame 4, the cathode drain plate 7 and the cathode terminal plate 8 are all provided with limiting screw holes 10 for the bolt assembly to pass through, so as to limit and fix the components to form a tightly fitting whole (electrolysis unit).

[0030] The cathode catalytic material 6 of the electrolysis unit is connected to a hydrogen collection device; the hydrogen collection device includes a gas pipeline 9 and a gas storage tank 19; one end of the gas pipeline 9 is connected to the gas storage tank 19, and the other end enters the cathode drain plate 7 of each electrolysis unit in the form of a branch pipeline and extends to the cathode catalytic material 6. After the hydrogen is generated in each electrolysis unit, it is discharged into the gas storage tank 19 for unified collection; in order to further dehydrate the generated hydrogen, a gas dehydrator 21 is also provided on the gas pipeline 9 at the inlet end of the gas storage tank 19, and an inlet valve 22 that can control the gas flow rate is also provided at the inlet end of the gas dehydrator 21; the gas dehydrator 21 can discharge the dehydrated hydrogen into the gas storage tank 19. An automatic exhaust valve 18 is provided on the branch pipelines connecting the gas pipeline 9 to the cathode catalytic material 6 to prevent the electrolyte from entering the gas pipeline due to excessive flow rate.

[0031] The electrolyte pipeline 11 is connected to a liquid storage tank 12 for storing electrolyte solution and a pump 13 for pumping electrolyte solution at the inlet end before entering the first electrolytic unit. The electrolyte pipeline 11 is located at the outlet end after the last electrolytic unit and extends out of the housing 1 and is connected to an automatic diluter 20. The automatic diluter 20 is connected to a nozzle 15 for spraying electrolyte solution and hydrogen peroxide. The automatic diluter 20 can dilute hydrogen peroxide by different multiples to prevent excessively high concentrations of hydrogen peroxide from corroding crops and equipment. The outlet end of the pump 13 is provided with a control valve 14 that can control the liquid flow to control the flow of the electrolyte solution entering the electrolytic unit.

[0032] The cathode catalytic material 6 and the anode catalytic material 3 of the electrolysis unit are both mesh structures with an area of ​​0.1 m 2 When the electrolyte solution enters the catalyst material, it can fill the grid space inside it, thereby increasing the reaction contact area. This embodiment uses a titanium (Ti) mesh as a cathode catalyst material, and uses an impregnation method to evenly attach a tin oxide (SnO2) catalyst to the titanium mesh as an anode catalyst material.

[0033] The working mode of the utility model is as follows: first, the electrolyte solution is poured into the liquid storage tank 12, and then the pump 13 and the control valve 14 are turned on to allow the electrolyte solution in the liquid storage tank 12 to enter the electrolytic units 2 connected in series in the housing 1 at a certain flow rate, and the electrolyte solution enters the anode catalyst material 3 and the cathode catalyst material 6 of each electrolytic unit 2 in turn through the electrolyte pipeline 11; at the same time, the DC power supply connected to the two ends of the series electrolytic units is turned on to apply a voltage that meets the requirements. When the electrolyte solution enters the anode and cathode of each electrolytic unit one by one, through the action of the proton exchange membrane 5, the anode undergoes an oxidation reaction to produce hydrogen peroxide; the cathode undergoes a reduction reaction to produce hydrogen. The hydrogen peroxide produced by each electrolytic unit does not need to be extracted and separated from the electrolyte solution. As the electrolysis product is gradually output from the electrolyte pipeline 11 to the end of the production device, the concentration of hydrogen peroxide continues to accumulate and increase; finally, the hydrogen peroxide products of all electrolytic units and the unreacted electrolyte enter the automatic diluter 20 connected to the outlet end of the electrolyte pipeline 11, and are diluted to the required concentration and drip-irrigated to the crops together with the electrolyte. At the same time, the hydrogen produced by the cathode of each electrolysis unit is collected into the gas storage tank 19 via the gas pipeline 9.

[0034] Example 2

[0035] A device having the same structure as that of Example 1 is used, wherein the electrolysis unit uses a titanium mesh as a cathode catalyst material, a tin oxide (SnO2) catalyst is evenly attached to the titanium mesh as an anode catalyst material by impregnation, and 2M KHCO3 is used as an electrolyte solution. During operation, the KHCO3 electrolyte in the liquid storage tank 12 is pumped into the housing 1 at a flow rate of 1L / min; at the same time, a DC power supply is connected to the terminal blocks at both ends of the series electrolysis unit, and a voltage of about 10V is applied.

[0036] It has been determined that the concentration of hydrogen peroxide produced by the device reaches 1%, and the yield reaches 1 kg / day; the purity of the produced hydrogen reaches 98-99%, and the yield reaches 0.06 kg / day.

[0037] Example 3

[0038] A device having the same structure as that of Example 1 is used, wherein the electrolysis unit uses a titanium mesh as a cathode catalyst material, and a calcium stannate (CaSnO3) catalyst is sprayed on the titanium mesh by ultrasonic spraying as an anode catalyst material, and 2M KHCO3 is used as an electrolyte solution. During operation, the KHCO3 electrolyte in the liquid storage tank 12 is pumped into the housing 1 at a flow rate of 2L / min; at the same time, a DC power supply is connected to the terminal blocks at both ends of the series electrolysis unit, and a voltage of about 20V is applied.

[0039] It has been determined that the concentration of hydrogen peroxide produced by the device reaches 0.5%, with a yield of 2 kg / day; the purity of the produced hydrogen reaches 98-99%, with a yield of 0.12 kg / day.

[0040] Example 4

[0041] The device with the same structure as that of Example 1 is used. The electrolysis unit uses ultrasonic spraying to spray zinc oxide (ZnO) catalyst on the titanium mesh as the anode catalyst material, and sprays Pt / conductive carbon material on the titanium mesh as the cathode catalyst material; 2M KH2PO4 is used as the electrolyte solution. When working, the KH2PO4 electrolyte in the liquid storage tank 12 is pumped into the housing 1 at a flow rate of 1L / min; at the same time, a DC power supply is connected to the terminal boards at both ends of the series electrolysis unit, and a voltage of about 10V is applied.

[0042] It has been determined that the concentration of hydrogen peroxide produced by the device reaches 0.2%, and the yield reaches 0.5 kg / day; the purity of the produced hydrogen reaches 98-99%, and the yield reaches 0.03 kg / day.

[0043] Example 5

[0044] A device having the same structure as that of Example 1 is used, wherein the electrolysis unit uses a nickel foam mesh as the cathode catalyst material, and zinc stannate (ZnSnO3) catalyst is uniformly attached to the nickel foam mesh as the anode catalyst material by hydrothermal synthesis, and 2M K2CO3 is used as the electrolyte solution. During operation, the K2CO3 electrolyte in the liquid storage tank 12 is pumped into the housing 1 at a flow rate of 2L / min; at the same time, a DC power supply is connected to the terminal boards at both ends of the series electrolysis unit, and a voltage of about 20V is applied.

[0045] It has been determined that the concentration of hydrogen peroxide produced by the device reaches 2%, with a yield of 4 kg / day; the purity of the produced hydrogen reaches 98-99%, with a yield of 0.24 kg / day.

Claims

1. A hydrogen peroxide continuous reaction preparation device for agricultural drip irrigation, characterized in that: The invention has a shell, in which a plurality of electrolytic units connected in series are arranged, and an electrolyte pipeline passing through the electrolytic units connected in series; each electrolytic unit has an anode terminal plate, an anode catalyst material, a proton exchange membrane, a cathode catalyst material and a cathode terminal plate arranged in sequence, and the electrolyte pipeline passes through the anode catalyst material and the cathode catalyst material in each electrolytic unit in sequence; the cathode catalyst material of the electrolytic unit is connected to a hydrogen collecting device; the inlet end of the electrolyte pipeline before entering the first electrolytic unit is connected to a liquid storage tank for storing electrolyte solution and a pump for delivering electrolyte solution, and the outlet end of the electrolyte pipeline located after the last electrolytic unit extends out of the shell as a nozzle for spraying electrolyte solution and hydrogen peroxide; the hydrogen collecting device includes a gas pipeline and a gas storage tank; one end of the gas pipeline is connected to the gas storage tank, and the other end is connected to the cathode catalyst material of each electrolytic unit in the form of a branch pipeline; the outlet end of the electrolyte pipeline extending out of the shell is connected to an automatic diluter, and the automatic diluter is connected to the nozzle for spraying electrolyte solution and hydrogen peroxide; a gas dehydrator is also provided on the gas pipeline at the inlet end of the gas storage tank.

2. The hydrogen peroxide continuous reaction preparation device according to claim 1, characterized in that: The cathode and anode catalyst materials are surrounded by cathode and anode drainage plates respectively; the proton exchange membrane is surrounded by a sealing frame; The anode terminal plate, anode drain plate, sealing frame, cathode drain plate and cathode terminal plate in the electrolytic unit are tightly fitted in sequence, and all five are provided with through holes for allowing electrolyte solution to flow through the anode catalytic material and the cathode catalytic material in sequence, thereby forming an electrolyte pipeline in the electrolytic unit.

3. The hydrogen peroxide continuous reaction preparation device according to claim 2, characterized in that: The branch pipelines connecting the gas pipeline to the cathode catalytic material are all equipped with automatic exhaust valves; the gas pipeline at the inlet end of the gas dehydrator is also equipped with an intake valve that can control the gas flow; the outlet end of the pump is equipped with a control valve that can control the liquid flow.

4. The hydrogen peroxide continuous reaction preparation device according to claim 3, characterized in that: The cathode and anode catalytic materials of the electrolysis unit are both in a mesh structure, on which catalysts are loaded.

5. The hydrogen peroxide continuous reaction preparation device according to claim 3, characterized in that: An insulating layer is provided between the shell and the series electrolysis units inside the shell.

6. The hydrogen peroxide continuous reaction preparation device according to claim 3, characterized in that: The anode wiring board, the anode drain plate, the sealing frame, the cathode drain plate and the cathode wiring board are all provided with limiting screw holes.

7. The hydrogen peroxide continuous reaction preparation device according to claim 3, characterized in that: The cathode and anode catalytic material areas of the electrolysis unit are 0.1 to 1 m 2 , the number of the electrolysis units is 3 to 50.

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