A biodegradation test cabinet

Abstract

The invention discloses a biodegradation test cabinet, including a cabinet body, wherein the cabinet body is divided into an upper layer and a lower layer by a first transverse partition; the upper layer is divided into an upper zone, an upper zone and an upper zone from left to right by a first upper longitudinal partition and a second upper longitudinal partition; the upper zone is an air purification pretreatment zone; the upper zone is divided into an upper zone 21 and an upper zone 22 by a second transverse partition, the upper zone 21 is a composting reaction zone, and the upper zone 22 is a condensation zone; the upper zone 3 is divided into an upper zone 31 and an upper zone 32 by a third upper longitudinal partition, the upper zone 31 is a control zone, and the upper zone 32 is a carbon dioxide absorption and detection zone; the lower layer is divided into a lower zone, a lower zone 2 and a lower zone from left to right by a first lower longitudinal partition and a second lower longitudinal partition; the lower zone is a gas solenoid valve control zone; the lower zone 2 is a microcomputer room; and the lower zone 3 is a spare zone. The above device greatly reduces the floor space, improves the test efficiency, and realizes the integration and scale of the degradability rate detection.

Description

Technical Field

[0001] The invention relates to a biodegradation test cabinet and belongs to the technical field of biodegradation testing. Background Art

[0002] Since conventional plastic products are difficult to degrade in the natural environment, a large amount of "white pollution" has been caused. The increasingly serious "white pollution" problem has forced people to look for more environmentally friendly plastic products, and degradable plastics are one of the ideal new materials. The degradable materials industry is an emerging industry and is developing very rapidly. Due to its high production cost, some businesses use the similar appearance of ordinary plastic products and degradable plastic products to make false propaganda and confuse the real with the fake, which has aggravated the adverse impact of "white pollution" on the environment and also restricted the rapid and healthy development of the degradable materials industry.

[0003] The biocomposting degradation rate is an important indicator for characterizing biodegradable plastics. The specific determination method requires artificial simulation of composting conditions and the calculation of the degradation rate of the material by quantitatively detecting the amount of carbon dioxide released during the composting process. Currently, most of the devices used for composting detection are self-built experimental devices, which have problems such as large footprint and low throughput. Foreign testing agencies need hundreds of square meters of experimental sites to assemble testing devices. During the 3-6 month testing cycle, only 1-3 samples can be tested at the same time. The test efficiency is low and cannot meet the growing industry testing needs. It has become a key bottleneck problem restricting the development of the global industry, and the reliability and stability of existing tests still need to be further improved. Summary of the invention

[0004] The invention provides a biodegradation test cabinet with small footprint, high integration, high detection efficiency and high accuracy.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0006] A biodegradation test cabinet comprises a cabinet body, wherein a space inside the cabinet body is divided into an upper layer and a lower layer by a first horizontal partition plate arranged in the cabinet body;

[0007] The upper layer is divided into upper zone 1, upper zone 2 and upper zone 3 from left to right by the vertically arranged first upper longitudinal partition and the second upper longitudinal partition; the upper zone is the air purification pretreatment zone; the upper zone 2 is divided into upper zone 21 and upper zone 22 by the horizontally arranged second transverse partition, wherein the upper zone 21 is located below the upper zone 22, the upper zone 21 is the composting reaction zone, and the upper zone 22 is the condensation zone; the upper zone 3 is divided into upper zone 31 and upper zone 32 by the vertically arranged third upper longitudinal partition, the upper zone 31 is the control zone, and the upper zone 32 is the carbon dioxide absorption and detection zone;

[0008] The lower layer is divided into the lower zone, the lower zone 2 and the lower zone 3 from left to right by the vertically arranged first lower longitudinal partition and the second lower longitudinal partition; the lower zone is the gas solenoid valve control zone; the lower zone 2 is the microcomputer room; and the lower zone 3 is the spare zone.

[0009] The lower three areas are spare areas, used to store spare components of the equipment.

[0010] Each partition is provided with holes for lines and pipelines to pass through.

[0011] The above cabinet body has been improved in structural design, so that the limited space inside the cabinet body is fully and reasonably utilized, and multiple detection systems can be installed at the same time to complete the testing of multiple samples at the same time.

[0012] The arrangement of the above-mentioned partitions not only forms independent areas, ensuring the orderliness and organization of the test, but also facilitates the fixation and protection of various components.

[0013] In order to improve the structural strength of the device, the cabinet body, the first transverse partition, the second transverse partition, the first upper longitudinal partition, the second upper longitudinal partition, the third upper longitudinal partition, the first lower longitudinal partition and the second lower longitudinal partition are all made of metal.

[0014] In order to further improve the utilization of space, the first upper longitudinal partition board and the second upper longitudinal partition board are arranged in parallel, and the third upper longitudinal partition board and the second upper longitudinal partition board are arranged perpendicularly.

[0015] For ease of use, the upper three-one area is located in front of the upper three-two area.

[0016] The upper zone is provided with an air intake purification system for removing carbon dioxide from the air and improving the accuracy of the test; the upper zone 21 is provided with a composting reaction system and a temperature control system. The composting reaction system is used for composting reaction, and the temperature control system is used to control the temperature of the composting reaction. The upper zone 22 is provided with a condensation system. The condensation system is used to condense and recover the water vapor on the one hand, and can supplement the water required for composting as needed on the other hand; the upper zone 31 is provided with a touch panel for human-computer interaction input commands, the upper zone 32 is provided with a carbon dioxide absorption detection system and an exhaust gas treatment system. The carbon dioxide absorption detection system is used to detect the absorption of the generated carbon dioxide, and the exhaust gas treatment system is used to treat ammonia generated by composting, so as to reduce pollution to the surrounding environment; the lower zone is provided with a solenoid valve gas flow control system for controlling the air intake; the lower zone 2 is provided with a computer central control system for controlling the operation of each system according to the input commands.

[0017] The number of solenoid valve gas flow control systems, air intake purification systems, composting reaction systems, condensation systems, tail gas treatment systems and carbon dioxide absorption detection systems is equal and corresponds one to one; the corresponding solenoid valve gas flow control systems, air intake purification systems, composting reaction systems, condensation systems, tail gas treatment systems and carbon dioxide absorption detection systems are connected in sequence, that is, each composting reaction system has various independent solenoid valve gas flow control systems, air intake purification systems, condensation systems, tail gas treatment systems and carbon dioxide absorption detection systems, that is, each composting reaction is completed independently without interfering with each other and with high accuracy.

[0018] The computer central control system is connected to the touch panel; the temperature control system and the electromagnetic valve gas flow control system are both controlled by the computer central control system, and the temperature control system controls the temperature in the upper two-one zone. The touch panel sets the temperature, the opening of the electromagnetic valve, the stirring speed, etc. The computer central control system controls the operation of each system according to the input command. The specific control and connection can be directly realized by referring to the existing technology.

[0019] The temperature control system controls the temperature in the upper 21 zone by referring to the temperature control of the existing insulation box.

[0020] In order to improve the test efficiency and accuracy, the composting reaction system includes a support plate and a composting tank; the composting tank is arranged on the support plate, and there are more than two rows of composting tanks, and each row has more than three composting tanks;

[0021] The composting tank includes a tank body, a cover plate, a stirring rod, a stirring motor and a ventilation pipe;

[0022] The tank body includes an upper cylinder and a lower cylinder. Both the upper cylinder and the lower cylinder are cylinder structures with a bottom surface but no top surface. The bottom of the upper cylinder is connected to the top of the lower cylinder through a flange. The cover plate is covered on the top of the upper cylinder. The stirring motor is installed in the center of the top outside the cover plate. The stirring motor is controlled by a computer central control system. The stirring rod is located in the upper cylinder. The top of the stirring rod passes through the cover plate and is connected to the stirring motor and driven to rotate by the stirring motor. The bottom of the stirring rod is provided with more than two layers of stirring blades. Each layer of stirring blades has more than two blades. The blades are wavy structures along the length direction, and mesh holes are distributed on the blades. The bottom of the stirring rod is a hollow tubular structure, and air outlet holes are distributed on the side wall of the stirring rod.

[0023] One end of the ventilation pipe is the air inlet end and the other end is the air outlet end. The air inlet end of the ventilation pipe is located at the bottom of the upper cylinder and communicates with the interior of the lower cylinder. The air outlet end of the ventilation pipe passes through the bottom of the upper cylinder and extends from the lower end face of the stirring rod (the bottom end face) into the bottom of the stirring rod. The ventilation pipe and the lower end face of the stirring rod are sealed by a bearing sliding.

[0024] Each composting tank can complete an independent composting test. Multiple rows and columns of composting tanks can be assembled together to complete multiple tests independently at the same time. The tank body includes an upper cylinder and a lower cylinder. On the one hand, the gas enters from the bottom and exits from the top. The gas is sent to the lower cylinder through the pipeline, and then enters the bottom of the stirring rod through the vent pipe, flows out from the air outlet at the bottom of the stirring rod, and enters the compost material. The stirring rod releases gas while stirring, ensuring the uniformity of the gas and the sufficient contact between the gas and the material. The design of the wave-structured stirring blade increases the stirring area and improves the uniformity of stirring. The mesh design promotes the flow of materials and further improves the uniformity of stirring.

[0025] During composting, the composting material is placed in the upper cylinder, and water is poured into the lower cylinder. The water in the lower cylinder evaporates and, together with the air introduced into the lower cylinder, passes through the ventilation pipe stirring rod and is dispersed into the material, continuously providing the air and moisture required for composting.

[0026] In order to further improve the stability of the composting tank, the composting tank also includes a fixing rod, a nut is provided on the top of the fixing rod; the periphery of the cover plate and the periphery of the bottom of the lower cylinder both exceed the side wall of the tank body, the fixing rod is located outside the tank body, there are more than two fixing rods, and the bottom of the fixing rod passes through the cover plate and is threadedly connected to the bottom of the lower cylinder.

[0027] In order to improve the stability of use, as one of the implementation schemes, the support plate is a double-layer structure, the lower layer is the support layer, and the upper layer is the limit layer. The limit layer includes a frame, and the frame is provided with a transverse spring arranged along the transverse direction and a longitudinal spring arranged along the longitudinal direction. The transverse spring and the longitudinal spring cross to form a grid, and the bottom of the tank body passes through the transverse spring and the longitudinal spring and falls on the support layer; the two sides of the support plate are slidably connected to the inner wall of the upper second zone, similar to a drawer, and the upper second zone can be pulled out or pushed in. The above-mentioned cross-set spring limit not only ensures the stability of the limit, but also improves the adaptability of use.

[0028] In order to improve the stability of use, as another implementation scheme, the support plate is provided with limiting grooves whose number is equal to and corresponds to the tank body, and the bottom of the tank body is located in the corresponding limiting grooves.

[0029] In order to improve the accuracy of detection, the air intake purification system includes an air purification tank, which is a soda lime tank used to absorb carbon dioxide in the air to improve the accuracy of detection. The solenoid valve gas flow control system includes an intake pipe, a solenoid valve and a flow meter; the number of intake pipes, air purification tanks and compost tanks is equal and one-to-one corresponding. One end of the intake pipe extends into the upper zone and is connected to the bottom of the corresponding air purification tank, and the other end extends from the next zone to merge with the air outlet of the intake pump. Each intake pipe is provided with a pressure reducing valve and a flow meter, and the pressure reducing valve and the flow meter are both located in the next zone; the top of the air purification tank is connected to the lower cylinder of the corresponding compost tank through a pipeline. It is convenient to use and easy to control.

[0030] The air intake pump is located outside the cabinet body and is used to input air into each air intake pipe, and can be an air compressor.

[0031] In order to realize the recycling of water and facilitate timely water replenishment, the number of condensation systems is equal to the number of composting tanks and corresponds one to one; the condensation system includes a condensation water tank and a return pipe, the condensation water tank is filled with water, and the return pipe includes a first return pipe and a second return pipe; one end of the first return pipe is connected to the top of its corresponding tank body, and the other end is connected to the water in the condensation water tank; one end of the second return pipe is connected to the bottom of the condensation device, and the other end is connected to the lower cylinder of its corresponding composting tank, and a control valve is provided on the second return pipe; the top of the condensation water tank is connected to its corresponding tail gas treatment system through a pipeline. In this way, the gas generated by the composting first enters the condensation water tank, condenses the water vapor, and then flows into the tail gas treatment system; the water in the condensation water tank can also be replenished in the lower cylinder in time to meet the moisture requirements of the compost.

[0032] In order to improve the test efficiency and accuracy, the exhaust gas treatment system and the carbon dioxide absorption detection system are equal to the number of composting tanks and correspond one to one; the exhaust gas treatment system includes an ammonia absorption device and a dehumidification device. The ammonia absorption device is filled with sulfuric acid solution to absorb ammonia generated by composting to avoid pollution of the surrounding environment. The dehumidification device is provided with anhydrous calcium chloride layer and silica gel layer from bottom to top. The calcium chloride layer is used to absorb water. The setting of the silica gel layer is convenient for further water absorption and indication of water absorption effect. The silica gel layer contains cobaltous chloride, which will gradually change color after absorbing water. When the water absorption layer is close to saturation, it needs to be replaced; the carbon dioxide absorption detection system includes CO 2 Absorption unit, CO 2 The absorption device is equipped with CO 2 Reaction layer and anhydrous calcium chloride layer, CO 2 The reaction layer is a mixture of soda lime and sodium talc in a mass ratio of 1:1. 2 Effect of setting an anhydrous calcium chloride layer on the reaction layer on CO 2 The absorption of water produced by the absorption reaction is directly weighed by CO 2 The absorption device can tell the CO 2 The weight gain of the absorber, i.e. CO 2 The top of the condensate tank passes through the corresponding ammonia absorption device and dehumidification device through the pipeline, and then 2 The bottom of the absorber is connected to the CO 2 The top of the absorber is connected to the atmosphere through a pipeline.

[0033] The technologies not mentioned in the present invention are all referred to the prior art.

[0034] The biodegradation test cabinet of the present invention is used for biocompost degradability rate detection. The division of each functional area can meet the use requirements of each system of the equipment. The functional areas are connected by lines and pipelines to form a unified organism. Through the ingenious and reasonable structural design, the footprint of the equipment is greatly reduced, and more groups of degradation tests can be completed at the same time, thereby improving the test efficiency and realizing the integration and scale of biocompost degradability rate detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure of a biodegradation test cabinet of the present invention;

[0036] Figure 2 Schematic diagram of the composting tank structure in Example 4 of the present invention

[0037] Figure 3 This is a schematic diagram of the support plate structure in Example 6 of the present invention;

[0038] Figure 4 for Figure 3 A top view of

[0039] In the figure, 1 is the first transverse partition, 101 is the upper zone, 102 is the upper zone 21, 103 is the upper zone 22, 104 is the upper zone 3, 105 is the lower zone, 106 is the lower zone 2, 107 is the lower zone 3, 108 is the second transverse partition, 2 is the first upper longitudinal partition, 3 is the second upper longitudinal partition, 4 is the first lower longitudinal partition, 5 is the second lower longitudinal partition, 6 is the compost tank, 601 is the upper cylinder, 602 is the lower cylinder, 603 is the cover plate, 604 is the stirring rod, 6041 is the air outlet, 6042 is a stirring blade, 605 is a stirring motor, 606 is a ventilation pipe, 607 is a fixing rod, 7 is a support plate, 701 is a limiting layer, 7011 is a frame, 7012 is a transverse spring, 7013 is a longitudinal spring, 702 is a support layer, 8 is an air purification tank, 9 is an air intake pipe, 10 is a solenoid valve, 11 is a flow meter, 12 is a condensed water tank, 13 is a first reflux pipe, 14 is a second reflux pipe, 15 is an ammonia absorption device, 16 is a dehumidification device, 17 is a CO 2 Absorption device. DETAILED DESCRIPTION

[0040] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0041] In this application, directional words such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings or in use, and are only for the convenience of describing this application, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0042] Example 1

[0043] like Figure 1 As shown, a biodegradation test cabinet comprises a cabinet body, wherein a space inside the cabinet body is divided into an upper layer and a lower layer by a first horizontal partition plate arranged in the cabinet body;

[0044] The upper layer is divided into upper zone 1, upper zone 2 and upper zone 3 from left to right by the vertically arranged first upper longitudinal partition and the second upper longitudinal partition; the upper zone is the air purification pretreatment zone; the upper zone 2 is divided into upper zone 21 and upper zone 22 by the horizontally arranged second transverse partition, wherein the upper zone 21 is located below the upper zone 22, the upper zone 21 is the composting reaction zone, and the upper zone 22 is the condensation zone; the upper zone 3 is divided into upper zone 31 and upper zone 32 by the vertically arranged third upper longitudinal partition, the upper zone 31 is the control zone, and the upper zone 32 is the carbon dioxide absorption and detection zone;

[0045] The lower layer is divided from left to right into the lower zone, the lower zone two and the lower zone three by the vertically arranged first lower longitudinal partition plate and the second lower longitudinal partition plate; the lower zone is the gas solenoid valve control zone; the lower zone two is the microcomputer room; the lower zone three is the spare zone for storing spare components of the equipment.

[0046] The cabinet has been improved in structural design, so that the limited space in the cabinet is fully and reasonably utilized, and multiple detection systems can be installed at the same time to complete the testing of multiple samples. The setting of the above partitions not only forms independent areas, ensuring the orderliness and organization of the test, but also facilitates the fixation and protection of various components.

[0047] Example 2

[0048] On the basis of Example 1, the following improvements are further made: In order to improve the structural strength of the device, the cabinet body, the first transverse partition, the second transverse partition, the first upper longitudinal partition, the second upper longitudinal partition, the third upper longitudinal partition, the first lower longitudinal partition and the second lower longitudinal partition are all made of metal. In order to further improve the utilization of space, the first upper longitudinal partition and the second upper longitudinal partition are arranged in parallel, and the third upper longitudinal partition is arranged perpendicular to the second upper longitudinal partition. For ease of use, the upper three-one zone is located in front of the upper three-two zone. In order to reflect the integrity of the compost detection system, the carbon dioxide absorption detection system and the exhaust gas treatment system in the upper three-two zone are expressed with dotted lines.

[0049] Example 3

[0050] On the basis of Example 2, the following improvements are further made: an air intake purification system is provided in the upper zone to remove carbon dioxide from the air and improve the accuracy of the test; a composting reaction system and a temperature control system are provided in the upper zone 21, the composting reaction system is used for composting reaction, and the temperature control system is used to control the temperature of the composting reaction; a condensation system is provided in the upper zone 22, which is used to condense and recover the water vapor brought out on the one hand, and can replenish the water required for composting as needed on the other hand; a touch panel is provided in the upper zone 31 for human-computer interaction input commands, a carbon dioxide absorption detection system and an exhaust gas treatment system are provided in the upper zone 32, the carbon dioxide absorption detection system is used to detect the absorption of the generated carbon dioxide, and the exhaust gas treatment system is used to treat ammonia generated by composting, etc., to reduce pollution to the surrounding environment; a solenoid valve gas flow control system is provided in the lower zone for controlling the air intake; a computer is provided in the lower zone 2 The central control system of the machine is used to control the operation of each system according to the input command; the number of solenoid valve gas flow control system, air intake purification system, composting reaction system, condensation system, tail gas treatment system and carbon dioxide absorption detection system is equal and one-to-one; the corresponding solenoid valve gas flow control system, air intake purification system, composting reaction system, condensation system, tail gas treatment system and carbon dioxide absorption detection system are connected in sequence, that is, each composting reaction system has various independent solenoid valve gas flow control systems, air intake purification systems, condensation systems, tail gas treatment systems and carbon dioxide absorption detection systems, that is, each composting reaction is completed independently, does not interfere with each other, and has high accuracy; the computer central control system is connected to the touch panel; the temperature control system and the solenoid valve gas flow control system are both controlled by the computer central control system, and the temperature control system controls the temperature in the upper two-one zone. The touch panel sets the temperature, the opening of the solenoid valve, the stirring speed, etc., and the computer central control system controls the operation of each system according to the input command, and the specific control and connection can be directly realized by referring to the existing technology.

[0051] Example 4

[0052] On the basis of Example 3, the following improvements were made: In order to improve the test efficiency and accuracy, the composting reaction system includes a support plate and a composting tank; the composting tank is arranged on the support plate, and there are three rows of composting tanks, each row of composting tanks has nine composting tanks, and for simplicity, Figure 1 Only two composting tank reaction systems are shown in the figure, but other numbers can be set, and each composting tank has Figure 1 The independent test systems shown;

[0053] like Figure 4 As shown, the compost tank includes a tank body, a cover plate, a stirring rod, a stirring motor and a vent pipe;

[0054] The tank body includes an upper cylinder and a lower cylinder. Both the upper cylinder and the lower cylinder are cylinder structures with a bottom surface but no top surface. The bottom of the upper cylinder is connected to the top of the lower cylinder through a flange. The cover plate is covered on the top of the upper cylinder. The stirring motor is installed in the center of the top outside the cover plate. The stirring motor is controlled by a computer central control system. The stirring rod is located in the upper cylinder. The top of the stirring rod passes through the cover plate and is connected to the stirring motor and driven to rotate by the stirring motor. The bottom of the stirring rod is provided with three layers of stirring blades. Each layer of stirring blades has four blades. The blades are in a wavy structure along the length direction, and mesh holes are distributed on the blades. The bottom of the stirring rod is a hollow tubular structure, and air outlet holes are distributed on the side wall of the stirring rod.

[0055] One end of the ventilation pipe is the air inlet end and the other end is the air outlet end. The air inlet end of the ventilation pipe is located at the bottom of the upper cylinder and communicates with the interior of the lower cylinder. The air outlet end of the ventilation pipe passes through the bottom of the upper cylinder and extends from the lower end surface of the stirring rod into the bottom of the stirring rod. The ventilation pipe and the lower end surface of the stirring rod are sealed by a bearing sliding.

[0056] Each composting tank can complete an independent composting test. Multiple rows and columns of composting tanks can be assembled together to complete multiple tests independently at the same time. The tank body includes an upper cylinder and a lower cylinder. On the one hand, the gas enters from the bottom and exits from the top. The gas is sent to the lower cylinder through the pipeline, and then enters the bottom of the stirring rod through the vent pipe, flows out from the air outlet at the bottom of the stirring rod, and enters the compost material. The stirring rod releases gas while stirring, ensuring the uniformity of the gas and the sufficient contact between the gas and the material. The design of the wave-structured stirring blade increases the stirring area and improves the uniformity of stirring. The mesh design promotes the flow of materials and further improves the uniformity of stirring.

[0057] During composting, the composting material is placed in the upper cylinder, and water is poured into the lower cylinder. The water in the lower cylinder evaporates and, together with the air introduced into the lower cylinder, passes through the ventilation pipe stirring rod and is dispersed into the material, continuously providing the air and moisture required for composting.

[0058] Example 5

[0059] On the basis of Example 4, the following improvements are further made: in order to further improve the stability of the composting tank, the composting tank also includes a fixing rod, and a nut is provided on the top of the fixing rod; the periphery of the cover plate and the periphery of the bottom of the lower cylinder both extend beyond the side wall of the tank body, and the fixing rod is located outside the tank body. There are two fixing rods, and the bottom of the fixing rod passes through the cover plate and is threadedly connected to the bottom of the lower cylinder.

[0060] Example 6

[0061] Based on Example 5, the following improvements are further made: In order to improve the stability of use, as one of the implementation solutions, Figure 3 As shown, the support plate is a double-layer structure, the lower layer is the support layer, the upper layer is the limit layer, the limit layer includes a frame, the frame is provided with a transverse spring arranged in the transverse direction and a longitudinal spring arranged in the longitudinal direction, the transverse spring and the longitudinal spring cross to form a grid, the bottom of the tank body passes through the transverse spring and the longitudinal spring and falls on the support layer; the two sides of the support plate are slidably connected to the inner wall of the upper second zone, similar to a drawer, and the upper second zone can be pulled out or pushed in. The above-mentioned cross-set spring limit not only ensures the stability of the limit, but also improves the adaptability of use.

[0062] Example 7

[0063] On the basis of Example 5, the following improvements are further made: In order to improve the stability of use, as another implementation scheme, the support plate is provided with limit grooves whose number is equal to and corresponds to the tank body, and the bottom of the tank body is located in the corresponding limit grooves.

[0064] Example 8

[0065] On the basis of Example 5, the following improvements are further made: in order to improve the accuracy of detection, the air intake purification system includes an air purification tank, which is a soda lime tank for absorbing carbon dioxide in the air to improve the accuracy of detection, and the solenoid valve gas flow control system includes an intake pipe, a solenoid valve and a flow meter; the number of intake pipes, air purification tanks and compost tanks is equal and one-to-one corresponding, one end of the intake pipe extends into the upper zone and is connected to the bottom of the corresponding air purification tank, and the other end extends from the next zone to merge with the air outlet of the intake pump, each intake pipe is provided with a pressure reducing valve and a flow meter, and the pressure reducing valve and the flow meter are both located in the next zone; the top of the air purification tank is connected to the lower cylinder of the corresponding compost tank through a pipeline. It is convenient to use and control.

[0066] Example 9

[0067] On the basis of Example 8, the following improvements are further made: in order to realize the recycling of water and facilitate timely water replenishment, the number of condensation systems is equal to the number of composting tanks and corresponds one to one; the condensation system includes a condensation water tank and a return pipe, the condensation water tank is filled with water, and the return pipe includes a first return pipe and a second return pipe; one end of the first return pipe is connected to the top of its corresponding tank body, and the other end is connected to the water in the condensation water tank; one end of the second return pipe is connected to the bottom of the condensation device, and the other end is connected to the lower cylinder of its corresponding composting tank, and a control valve is provided on the second return pipe; the top of the condensation water tank is connected to its corresponding tail gas treatment system through a pipeline. In this way, the gas generated by the compost first enters the condensation water tank, condenses the water vapor, and then flows into the tail gas treatment system; the water in the condensation water tank can also be replenished in the lower cylinder in time to meet the moisture requirements of the compost.

[0068] Example 10

[0069] On the basis of Example 9, the following improvements were further made: in order to improve the test efficiency and accuracy, the exhaust gas treatment system and the carbon dioxide absorption detection system are equal to the number of composting tanks and correspond one to one; the exhaust gas treatment system includes an ammonia absorption device and a dehumidification device, the ammonia absorption device is filled with sulfuric acid solution, which is used to absorb ammonia generated by composting to avoid pollution of the surrounding environment, and the dehumidification device is provided with anhydrous calcium chloride layer and silica gel layer from bottom to top, the calcium chloride layer is used to absorb water, and the setting of the silica gel layer is convenient for further water absorption and indicating the water absorption effect, and the silica gel layer contains cobaltous chloride, which will gradually change color after absorbing water. When the water absorption layer is close to saturation, the water absorption layer needs to be replaced; the carbon dioxide absorption detection system includes CO 2 Absorption unit, CO 2 The absorption device is equipped with CO 2 Reaction layer and anhydrous calcium chloride layer, CO 2 The reaction layer is a mixture of soda lime and sodium talc in a mass ratio of 1:1. 2 Effect of setting an anhydrous calcium chloride layer on the reaction layer on CO 2 The absorption of water produced by the absorption reaction is directly weighed by CO 2 The absorption device can tell the CO 2 The weight gain of the absorber, i.e. CO 2 The top of the condensate tank passes through the corresponding ammonia absorption device and dehumidification device through the pipeline, and then 2 The bottom of the absorber is connected to the CO 2 The top of the absorber is connected to the atmosphere through a pipeline.

[0070] The biodegradation test cabinets in the above-mentioned examples are used for biocompost degradability rate detection. The division of each functional area can meet the use requirements of each system of the equipment. The functional areas are connected by lines and pipelines to form a unified organism. The ingenious and reasonable structural design greatly reduces the footprint of the equipment, and can complete more groups of degradation tests at the same time, thereby improving the test efficiency and realizing the integration and scale of biocompost degradability rate detection equipment.

Claims

1. A biodegradation test cabinet, Features: The cabinet body comprises a cabinet main body, wherein a first horizontal partition is arranged in the cabinet main body to divide the space in the cabinet main body into an upper layer and a lower layer; The upper layer is divided into upper zone 1, upper zone 2 and upper zone 3 from left to right by the vertically arranged first upper longitudinal partition and the second upper longitudinal partition; the upper zone is the air purification pretreatment zone; the upper zone 2 is divided into upper zone 21 and upper zone 22 by the horizontally arranged second transverse partition, wherein the upper zone 21 is located below the upper zone 22, the upper zone 21 is the composting reaction zone, and the upper zone 22 is the condensation zone; the upper zone 3 is divided into upper zone 31 and upper zone 32 by the vertically arranged third upper longitudinal partition, the upper zone 31 is the control zone, and the upper zone 32 is the carbon dioxide absorption and detection zone; The lower layer is divided into the lower zone, the lower zone 2 and the lower zone 3 from left to right by the vertically arranged first lower longitudinal partition and the second lower longitudinal partition; the lower zone is the gas solenoid valve control zone; the lower zone 2 is the microcomputer room; the lower zone 3 is the standby zone; The upper 21st area is equipped with a composting reaction system and a temperature control system. The composting reaction system is used for composting reaction, and the temperature control system is used to control the temperature of the composting reaction; The composting reaction system includes a support plate and a composting tank; the composting tank is arranged on the support plate, and there are more than two rows of composting tanks, and each row has more than three composting tanks; The composting tank includes a tank body, a cover plate, a stirring rod, a stirring motor and a ventilation pipe; The tank body includes an upper cylinder and a lower cylinder. Both the upper cylinder and the lower cylinder are cylinder structures with a bottom surface but no top surface. The bottom of the upper cylinder is connected to the top of the lower cylinder through a flange. The cover plate is covered on the top of the upper cylinder. The stirring motor is installed in the center of the top outside the end cover. The stirring motor is controlled by a computer central control system. The stirring rod is located in the upper cylinder. The top of the stirring rod passes through the cover plate and is connected to the stirring motor and driven to rotate by the stirring motor. The bottom of the stirring rod is provided with more than two layers of stirring blades. Each layer of stirring blades has more than two blades. The blades are wavy structures along the length direction, and mesh holes are distributed on the blades. The bottom of the stirring rod is a hollow tubular structure, and air outlet holes are distributed on the side wall of the stirring rod. One end of the vent pipe is an air inlet end, and the other end is an air outlet end. The air inlet end of the vent pipe is located at the bottom of the upper cylinder and communicates with the interior of the lower cylinder. The air outlet end of the vent pipe passes through the bottom of the upper cylinder and extends from the lower end surface of the stirring rod into the bottom of the stirring rod. The vent pipe and the lower end surface of the stirring rod are sealed by a bearing sliding. The composting tank also includes a fixing rod with a nut on the top. The periphery of the cover plate and the periphery of the bottom of the lower cylinder are both beyond the side wall of the tank body. The fixing rod is located outside the tank body. There are more than two fixing rods. The bottom of the fixing rod passes through the cover plate and is threadedly connected to the bottom of the lower cylinder.

2. The biodegradation test cabinet according to claim 1, Features: The cabinet body, the first transverse partition, the second transverse partition, the first upper longitudinal partition, the second upper longitudinal partition, the third upper longitudinal partition, the first lower longitudinal partition and the second lower longitudinal partition are all made of metal; the first upper longitudinal partition and the second upper longitudinal partition are arranged in parallel, and the third upper longitudinal partition is arranged perpendicular to the second upper longitudinal partition; the upper three one zone is located in front of the upper three two zones.

3. The biodegradation test cabinet according to claim 1 or 2, Features: The upper zone is equipped with an air intake purification system; the upper zone 22 is equipped with a condensation system; the upper zone 31 is equipped with a touch panel, and the upper zone 32 is equipped with a carbon dioxide absorption detection system and an exhaust gas treatment system; the lower zone is equipped with a solenoid valve gas flow control system; the lower zone 2 is equipped with a computer central control system; The number of solenoid valve gas flow control systems, air intake purification systems, composting reaction systems, condensation systems, tail gas treatment systems and carbon dioxide absorption detection systems are equal and correspond one to one; the corresponding solenoid valve gas flow control systems, air intake purification systems, composting reaction systems, condensation systems, tail gas treatment systems and carbon dioxide absorption detection systems are connected in sequence; The computer central control system is connected with the touch panel; the temperature control system and the solenoid valve gas flow control system are both controlled by the computer central control system.

4. The biodegradation test cabinet according to claim 1 or 2, Features: The support plate has a double-layer structure, the lower layer is the support layer, and the upper layer is the limiting layer. The limiting layer includes a frame, and the frame is provided with a transverse spring arranged along the transverse direction and a longitudinal spring arranged along the longitudinal direction. The transverse spring and the longitudinal spring cross to form a grid shape, and the bottom of the tank body passes through the transverse spring and the longitudinal spring and falls on the support layer; both sides of the support plate are slidably connected to the inner wall of the upper second zone.

5. The biodegradation test cabinet according to claim 1 or 2, Features: The supporting plate is provided with limiting grooves which are equal in number to the tank body and correspond one to one, and the bottom of the tank body is located in the corresponding limiting grooves.

6. The biodegradation test cabinet according to claim 1 or 2, Features: The air intake purification system includes an air purification tank, which is a soda lime tank. The solenoid valve gas flow control system includes an intake pipe, a solenoid valve and a flow meter. The number of intake pipes, air purification tanks and compost tanks is equal and one-to-one corresponding. One end of the intake pipe extends into the upper zone and is connected to the bottom of the corresponding air purification tank, and the other end extends from the next zone and merges into the air outlet of the intake pump. Each intake pipe is provided with a pressure reducing valve and a flow meter, and the pressure reducing valve and the flow meter are both located in the next zone; the top of the air purification tank is connected to the lower cylinder of the corresponding compost tank through a pipeline.

7. The biodegradation test cabinet according to claim 6, Features: The number of condensation systems is equal to the number of composting tanks and corresponds one to one; the condensation system includes a condensation water tank and a reflux pipe, the condensation water tank is filled with water, and the reflux pipe includes a first reflux pipe and a second reflux pipe; one end of the first reflux pipe is connected to the top of its corresponding tank body, and the other end is connected to the water in its corresponding condensation water tank; one end of the second reflux pipe is connected to the bottom of its corresponding condensation device, and the other end is connected to the lower cylinder of its corresponding composting tank, and a control valve is provided on the second reflux pipe; the top of the condensation water tank is connected to its corresponding exhaust gas treatment system through a pipeline.

8. The biodegradation test cabinet according to claim 7, Features: The number of exhaust gas treatment systems and carbon dioxide absorption detection systems is equal to that of composting tanks and corresponds one to one; the exhaust gas treatment system includes an ammonia absorption device and a dehumidification device, the ammonia absorption device is filled with sulfuric acid solution, and the dehumidification device is provided with anhydrous calcium chloride layer and silica gel layer from bottom to top; the carbon dioxide absorption detection system includes a CO2 absorption device, and the CO2 absorption device is provided with a CO2 reaction layer and anhydrous calcium chloride layer from bottom to top, and the CO2 reaction layer is a mixture of soda lime and sodium talc; the top of the condensate tank is connected to the bottom of the CO2 absorption device through a pipeline after passing through its corresponding ammonia absorption device and dehumidification device in sequence; the top of the CO2 absorption device is connected to the atmosphere through a pipeline.

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