A biochemical treatment device and system

Abstract

This invention discloses a biochemical treatment device and system. The biochemical treatment device includes a mixing chamber with an inlet, an outlet, and an exhaust outlet, as well as a receiving space for accommodating materials; a mixing shaft rotatably disposed within the receiving space, with multiple rake blades mounted on the mixing shaft, and an axial jet air path extending from the mixing shaft's interior, which is connected to an oxygen-supplementing hot air source; an air nozzle disposed on the mixing shaft, connecting the receiving space and the jet air path; and an air distribution pipe connected to the oxygen-supplementing hot air source, with its outlet located on the inner wall of the mixing chamber. In this biochemical treatment device, the oxygen-supplementing hot air source enters the receiving space of the mixing chamber through two air paths. The first air path directly blows the oxygen-supplementing hot air into the material, heating and drying it inside, increasing the material's heating and vaporization area; the second air path heats and dries the material via thermal convection.

Description

Technical Field

[0001] This invention relates to the field of biochemical treatment equipment technology, and more particularly to a biochemical treatment device and system. Background Technology

[0002] Food waste is quite complex, mainly consisting of water, leftover rice and flour products, fruit peels, vegetables, animal and vegetable oils, fish, meat, bones, as well as a mixture of waste tableware, plastics, paper towels, and other materials.

[0003] Food waste treatment plants typically use biochemical treatment equipment to treat food waste through high-temperature aerobic fermentation. However, existing biochemical treatment equipment has the following drawbacks in the process of treating food waste:

[0004] (1) When the moisture content of kitchen waste is ≥40%, the kitchen waste is not loose in the initial stage of heating, fermentation and drying. It is often in clumps. The air blown into the mixing chamber by the oxygen supplementation device system cannot enter the kitchen waste or enters less, resulting in a small heating area and gasification area of ​​the kitchen waste. It cannot meet the temperature and oxygen conditions required by the kitchen waste in the aerobic fermentation, drying and cooling process.

[0005] (2) The existing oxygenation system has only one air path, which results in low utilization of the effective storage capacity and total heat transfer area of ​​the mixing chamber.

[0006] Therefore, how to provide a biochemical treatment device that can increase the heating area and gasification area of ​​materials, while improving the utilization rate of the effective storage capacity of the mixing chamber and the total heat transfer area, is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0007] In view of this, the purpose of the present invention is to provide a biochemical treatment device to increase the heating area and gasification area of ​​materials, while improving the utilization rate of the effective storage capacity of the mixing chamber and the total heat transfer area.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A biochemical treatment device, comprising:

[0010] The mixing chamber is provided with a feed inlet, a discharge outlet and an exhaust outlet, as well as a receiving space for containing materials;

[0011] A stirring shaft is rotatably disposed within the accommodating space. The stirring shaft is provided with multiple rake blades, and an air jetting passage is provided inside the stirring shaft along its axial direction. The air jetting passage can be connected to an oxygen supplementation heat gas source.

[0012] An air nozzle, disposed on the stirring shaft, and connected to the receiving space and the injection air passage; and

[0013] The air distribution duct is connected to the oxygen supplementation heat source, and the air outlet of the air distribution duct is located on the inner wall of the mixing chamber.

[0014] Optionally, in the above-mentioned biochemical treatment device, the stirring chamber includes a first shell and a second shell, the second shell being disposed outside the first shell to form a flow space between the first shell and the second shell that allows the supply of heat source to flow, and the bottom of the flow space is provided with a condensate drain outlet.

[0015] Optionally, in the above-mentioned biochemical treatment device, the rake blades include a first set of rake blades and a second set of rake blades, the first set of rake blades and the second set of rake blades are symmetrically arranged along the central face of the stirring shaft, and the first set of rake blades and the second set of rake blades are arranged at opposite angles on the stirring shaft.

[0016] Optionally, the above-mentioned biochemical treatment device further includes a first electric butterfly valve, a second electric butterfly valve, and a central controller. The first electric butterfly valve is installed on the connecting pipeline between the jet gas path and the oxygen supplementation heat source, and the second electric butterfly valve is installed on the connecting pipeline between the air distribution pipe and the oxygen supplementation heat source. Both the first electric butterfly valve and the second electric butterfly valve are communicatively connected to the central controller.

[0017] Optionally, the above-mentioned biochemical treatment device further includes a driving component and a sprocket transmission mechanism. The driving component is used to drive the sprocket in the chain transmission mechanism to rotate, and the sprocket transmission mechanism is used to transmit the power of the driving component to the stirring shaft. The driving component is communicatively connected to the central controller.

[0018] Optionally, the above-mentioned biochemical treatment device also includes a rotary joint, which connects the stirring shaft and the pipeline for conveying the oxygen supplementation heat source.

[0019] Optionally, in the above-mentioned biochemical treatment device, the stirring shaft is provided with a jet nozzle cover, the jet nozzle is located in the jet nozzle cover, and the jet nozzle cover is provided with a venturi-structured damper.

[0020] Optionally, in the above-mentioned biochemical treatment device, the jet nozzle is fitted with a rubber air leak, the rubber air leak comprising at least two flat sleeves, which can adhere together under atmospheric pressure.

[0021] Optionally, the above-mentioned biochemical treatment apparatus includes an intake fan, a heat exchanger, and the biochemical treatment apparatus as described above;

[0022] The heat exchanger is connected to the intake fan and the injection air path on one side, and to the intake fan and the air distribution duct on the other side. The heat exchanger is also connected to a heat source.

[0023] Optionally, the above-mentioned biochemical treatment device further includes a steam generation device and a steam distribution cylinder;

[0024] The steam generated in the steam generating device flows through the steam distribution cylinder, and a portion of it enters the flow space formed by the first and second shells of the biochemical treatment device to heat the material in the mixing chamber as a heat source; the other portion enters the heat exchanger to heat the air in the heat exchanger as a heat source.

[0025] Optionally, the above-mentioned biochemical treatment device further includes a feeding device and a discharging device. The feeding device is used to convey materials to the inlet of the biochemical treatment device, and the discharging device is used to receive and convey the materials discharged from the outlet of the biochemical treatment device.

[0026] Optionally, the above-mentioned biochemical treatment device further includes an exhaust fan, an exhaust duct, and a dust collector. The exhaust duct connects the exhaust fan and the exhaust port of the mixing chamber, and the dust collector is disposed between the exhaust fan and the exhaust port.

[0027] Optionally, the above-mentioned biochemical treatment device further includes a condensate tank, which is connected to the flow space of the heat exchanger and the stirring chamber.

[0028] When using the biochemical treatment device provided by this invention, since the mixing chamber is provided with an inlet, an outlet and a receiving space for accommodating materials, and the mixing shaft is rotatably arranged in the receiving space, and multiple rake blades are provided on the mixing shaft, the material enters the receiving space through the inlet, and the rake blades mix and transport the material under the action of the rotation of the mixing shaft; since the mixing shaft is provided with a jet nozzle, the jet nozzle is connected to the receiving space and the jet gas path, and the jet gas path can be connected to the oxygen supplementation heat gas source. The air distribution duct is connected to the oxygen-supplementing heat source, and the air outlet of the air distribution duct is located on the inner wall of the mixing chamber. Therefore, in the biochemical treatment device provided by this invention, the oxygen-supplementing heat source can enter the containing space of the mixing chamber through two air paths. In the first air path, after the oxygen-supplementing heat source flows through the jet air path of the mixing shaft, it is sprayed into the material in the containing space by the jet nozzle in the airflow jet manner, so that the oxygen-supplementing heat source is directly blown into the interior of the material, heating and drying the material inside, and supplementing oxygen for the aerobic fermentation process of the material. In the second air path, the oxygen-supplementing heat source enters the containing space of the mixing chamber through the air outlet of the air distribution duct on the inner wall of the mixing chamber, heating and drying the material by thermal convection, and supplementing oxygen for the aerobic fermentation process of the material. After the oxygen-supplementing heat source in the above two air paths flows through the mixing chamber, it is discharged from the mixing chamber through the exhaust port. During the exhaust process from the mixing chamber, the discharged gas also acts as a carrier to carry out the water vapor overflowing from the material in the mixing chamber.

[0029] Therefore, the biochemical treatment device provided by the present invention has the following beneficial effects:

[0030] (1) When the moisture content of the material is high, heated air is sprayed out through the jet nozzle installed on the stirring shaft. In the air jet impact mode, air is sprayed from the inside of the material to the outside to impact the surface of the material, thereby heating and drying the material. At the same time, oxygen is added to the aerobic fermentation, increasing the heating area and gasification area of ​​the material, and meeting the temperature and oxygen conditions required by the material in the aerobic fermentation, drying and cooling process.

[0031] (2) It has two air ducts, which increases the effective storage capacity and total heat transfer area of ​​the mixing chamber;

[0032] (3) The oxygen-supplementing hot air source flowing through the mixing chamber serves as a carrier for the water vapor escaping from the material, transporting the water vapor to the outside of the mixing chamber.

[0033] (4) The material is heated and dried by the oxygen-enriched hot air source flowing through the mixing chamber. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a front view of a biochemical treatment device provided in an embodiment of the present invention.

[0036] Figure 2 This is a top view of the internal structure of a biochemical treatment device provided in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the internal side view of a biochemical treatment device provided in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the process flow of a biochemical treatment system for processing materials, provided in an embodiment of the present invention.

[0039] Among them, 100 is the mixing chamber, 101 is the first shell, 102 is the second shell, 103 is the condensate drain, 200 is the mixing shaft, 201 is the rake blade, 202 is the jet air passage, 2021 is the first electric butterfly valve, 203 is the driving component, 204 is the sprocket transmission mechanism, 205 is the rotary joint, 300 is the jet nozzle, 400 is the air distribution duct, 401 is the second electric butterfly valve, 500 is the air intake fan, 501 is the heat exchanger, 600 is the steam distribution cylinder, 700 is the feeding device, 800 is the discharging device, 900 is the exhaust fan, 901 is the exhaust duct, 902 is the dust collector, and 1000 is the condensate tank. Detailed Implementation

[0040] In view of this, the core of the present invention is to provide a biochemical treatment device to increase the heating area and gasification area of ​​materials, while improving the utilization rate of the effective storage capacity of the mixing chamber and the total heat transfer area.

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] like Figures 1 to 4 As shown in the figure, an embodiment of the present invention discloses a biochemical treatment device, including a stirring chamber 100, a stirring shaft 200, a jet nozzle 300 and a distribution pipe 400.

[0043] The mixing chamber 100 is provided with a feed inlet, a discharge outlet, and an exhaust outlet, as well as a receiving space for accommodating materials. The mixing shaft 200 is rotatably disposed within the receiving space. Multiple rake blades 201 are provided on the mixing shaft 200, and an air jet passage 202 is provided inside the mixing shaft 200 along its axial direction. The air jet passage 202 can be connected to the oxygen supplementation heat source. The air jet nozzle 300 is disposed on the mixing shaft 200 and connects the receiving space and the air jet passage 202. The air distribution pipe 400 can be connected to the oxygen supplementation heat source, and the air outlet of the air distribution pipe 400 is disposed on the inner wall of the mixing chamber 100.

[0044] When using the biochemical treatment device provided by the present invention, since the mixing chamber 100 is provided with an inlet, an outlet and a receiving space for containing materials, the mixing shaft 200 is rotatably arranged in the receiving space, and multiple rake blades 201 are provided on the mixing shaft 200, the material enters the receiving space through the inlet, and the rake blades 201 mix and transport the material under the rotation of the mixing shaft 200; since the mixing shaft 200 is provided with a jet nozzle 300, the jet nozzle 300 connects the receiving space and the jet air passage 202, and the jet air passage 202 can be connected to the oxygen supplementation heat gas source. The air distribution duct 400 is connected to the oxygen-supplementing hot air source, and the air outlet of the air distribution duct 400 is located on the inner wall of the mixing chamber 100. Therefore, in the biochemical treatment device provided by this invention, the oxygen-supplementing hot air source can enter the containing space of the mixing chamber 100 through two air paths. In the first air path, after the oxygen-supplementing hot air source flows through the injection air path 202 of the stirring shaft 200, it is injected into the material in the containing space by the jet nozzle 300 in a gas jet manner, so that the oxygen-supplementing hot air source is directly blown into the interior of the material, heating and drying the material inside. In the first air path, oxygen is supplemented for the aerobic fermentation process of the material; in the second air path, the oxygen-supplementing hot air source flows into the containment space of the mixing chamber 100 through the air outlet of the air distribution pipe 400 on the inner wall of the mixing chamber 100, heating and drying the material by thermal convection, while simultaneously supplementing oxygen for the aerobic fermentation process of the material; after passing through the mixing chamber 100, the oxygen-supplementing hot air source flows in both air paths are discharged from the mixing chamber 100 through the exhaust port. During the exhaust process of the mixing chamber 100, the discharged gas also acts as a carrier, carrying away the water vapor overflowing from the material in the mixing chamber 100.

[0045] Therefore, the biochemical treatment device provided by the present invention has the following beneficial effects:

[0046] (1) When the moisture content of the material is high, the heated air is sprayed out through the jet nozzle 300 installed on the stirring shaft 200. The air jet impacts the material surface from the inside to the outside in the air jet impact mode, which heats and dries the material. At the same time, it supplements oxygen for aerobic fermentation, increases the heating area and gasification area of ​​the material, and meets the temperature and oxygen conditions required by the material in the process of aerobic fermentation, drying and cooling.

[0047] (2) It has two air ducts, which increases the effective storage capacity and total heat transfer area of ​​the mixing chamber 100;

[0048] (3) The oxygen-supplementing hot air source flowing through the mixing chamber 100 serves as a carrier for the water vapor escaping from the material, transporting the water vapor to the outside of the mixing chamber 100.

[0049] (4) The material is heated and dried by the oxygen-enriched hot air source flowing through the mixing chamber 100.

[0050] It should be noted that the above-mentioned oxygen supplementation heat source can be a heated air source or an oxygen source, etc., as long as it can meet the oxygen supplementation requirements of the biochemical treatment device, it is within the scope of protection of this invention; optionally, the biochemical treatment device provided in the embodiment of this invention uses an air source.

[0051] Specifically, such as Figure 1 As shown, by setting up an intake fan 500 and a heat exchanger 501 connected to the air outlet of the intake fan 500, the heat exchanger 501 is connected to the supplied heat source, so that air is supplied to the heat exchanger 501 through the intake fan 500, and heat exchange occurs between the supplied heat source and the air in the heat exchanger 501 to heat the air; and the heat exchanger 501 is connected to the intake fan 500 and the injection air passage 202 on one hand, so that the heated air is introduced into the injection air passage 202 of the stirring shaft 200, and the heated air is sprayed out through the nozzle 300 to heat and dry the material; on the other hand, it is connected to the intake fan 500 and the air distribution pipe 400, so that the heated air is introduced into the air distribution pipe 400 on the inner wall of the stirring chamber 100, so that heated air is introduced into the stirring chamber 100 to heat and dry the material by thermal convection.

[0052] It should be understood that the above-mentioned heat source can be steam generated by a boiler or high-temperature exhaust gas discharged from a factory, etc. Any heat source that can heat the air in the heat exchanger 501 is within the scope of protection of this invention; optionally, the heat source provided in the embodiment of this invention is saturated steam.

[0053] In addition, during the material cooling stage, the aforementioned heat source needs to be cut off, while the intake fan 500 remains on. The ambient temperature air blown in by the intake fan 500 cools and oxygenates the material in the mixing chamber 100. At the same time, the ambient temperature air acts as a carrier for the water vapor escaping from the material in the mixing chamber 100, carrying the water vapor out of the mixing chamber 100.

[0054] Furthermore, the present invention does not specifically limit the number of air nozzles 300 or the arrangement of air nozzles 300 on the stirring shaft 200. Any arrangement that meets the usage requirements is within the scope of protection of the present invention. Optionally, the embodiment of the present invention provides 34 air nozzles 300. In order to avoid the material from being squeezed against each other during rotation and axial movement, thus affecting the heat exchange and ventilation effect and achieving the maximum airflow jet impact drying effect, the air nozzles 300 are designed and arranged in the same axial section of each rake blade 201, and arranged after rotating 40° along the rotation direction. The leftmost and rightmost ends of the stirring chamber 100 are not installed, and installation begins from the second rake blade 201 at both ends.

[0055] Furthermore, the aforementioned mixing chamber 100 includes a first shell 101 and a second shell 102. The second shell 102 is disposed outside the first shell 101 to form a flow space between the first shell 101 and the second shell 102, allowing the supply of a heat source to circulate. By introducing the supply of a heat source into the flow space between the first shell 101 and the second shell 102, the material in the mixing chamber 100 is heated through the heat conduction between the supply of the heat source and the first shell 101 and the material. This gives the biochemical treatment device two heating methods: one is heating through an oxygen-supplementing heat source, and the other is heating through the supply of a heat source circulating between the first shell 101 and the second shell 102, thereby improving the heating efficiency of the biochemical treatment device. In addition, a condensate drain 103 is provided at the bottom of the aforementioned flow space to discharge the condensate generated during the heating process.

[0056] The heat source supplied into the aforementioned circulation space can be the same as or different from the heat source supplied into the heat exchanger 501. In practical applications, it can be adjusted according to actual needs. As long as the heat source can meet the usage requirements, it falls within the protection scope of this invention. Optionally, the heat source supplied in the embodiment of this invention is the same as the heat source supplied into the heat exchanger 501.

[0057] The cross-sections of the first shell 101 and the second shell 102 provided by the present invention can be circular, U-shaped, or semi-circular, etc. Any structure that can meet the usage requirements is within the protection scope of the present invention. Optionally, the cross-sections of the first shell 101 and the second shell 102 provided in the embodiments of the present invention are both U-shaped to form a U-shaped shell with a closed jacket, and steam is introduced into the flow space of the closed jacket to heat the material by heat conduction.

[0058] Furthermore, this invention does not specifically limit the number or arrangement of the rake blades 201 on the stirring shaft 200. Any arrangement that meets the usage requirements falls within the scope of protection of this invention. Optionally, the embodiment of this invention provides 36 rake blades 201, which are divided into two groups: a first group and a second group. The first and second groups of rake blades are symmetrically arranged along the central plane of the stirring shaft 200 (which is a plane perpendicular to the axis of the stirring shaft 200), and the first and second groups of rake blades are arranged at opposite angles on the stirring shaft. This ensures that when the stirring shaft 200 rotates in a set direction, the material flows from both sides of the stirring chamber 100 to the middle along the axial direction of the stirring shaft 200, and then moves to both sides, repeating this cycle to ensure uniform stirring of the material. At the same time, the stirring of the material by the rake blades 201 prevents overheating when the material comes into contact with the inner wall of the U-shaped shell, and also crushes the material, increases the surface area for water vaporization, and accelerates the fermentation and drying process of the material.

[0059] like Figure 1 As shown, the biochemical treatment device also includes a first electric butterfly valve 2021, a second electric butterfly valve 401, and a central controller. The first electric butterfly valve 2021 is installed on the connecting pipe between the injection gas path 202 and the oxygen supplementation heat source, so as to control the on / off state of the oxygen supplementation heat source in the injection gas path 202. The second electric butterfly valve 401 is installed on the connecting pipe between the air distribution pipe 400 and the oxygen supplementation heat source, so as to control the on / off state of the oxygen supplementation heat source in the air distribution pipe 400. Both the first electric butterfly valve 2021 and the second electric butterfly valve 401 are communicatively connected to the central controller, so as to control the opening and closing of the first electric butterfly valve 2021 and the second electric butterfly valve 401 through the central controller, thereby realizing the automatic control of the biochemical treatment device.

[0060] The biochemical treatment device provided by the present invention further includes a drive component 203 and a sprocket transmission mechanism 204. The drive component 203 is used to drive the sprocket in the chain transmission mechanism to rotate. The sprocket transmission mechanism 204 is used to transmit the power of the drive component 203 to the stirring shaft 200, so as to provide power through the drive component 203 and transmit the power of the drive component 203 to the stirring shaft 200 through the sprocket transmission mechanism 204, so that the stirring shaft 200 rotates at a set speed. The drive component 203 is communicatively connected to the central controller so as to control the operating parameters of the drive component 203 through the central controller, thereby improving the automation level of the biochemical treatment device.

[0061] The aforementioned central controller comprises a PLC (Programmable Logic Controller), a touch screen, control programs and process software, as well as corresponding sensors for control parameters such as temperature, pressure, flow rate and humidity. It meets the requirements for inputting characteristic parameters of processed materials, storing process programs and calling operations, and can switch between manual and automatic operation modes as needed.

[0062] like Figure 2 As shown, the biochemical treatment device also includes a rotary joint 205, which connects the stirring shaft 200 and the pipeline for conveying the oxygen supplementation heat source, so as to fix the stirring shaft 200 and the pipeline for conveying the oxygen supplementation heat source through the rotary joint 205.

[0063] In addition, the stirring shaft 200 is equipped with a jet nozzle cover, and the jet nozzle 300 is located in the jet nozzle cover to protect the jet nozzle 300. The jet nozzle cover is also equipped with a venturi structure damper to accelerate the jetting airflow through the venturi structure, preventing the jet nozzle 300 from being unable to open due to excessive material thickness. This ensures that the opening and closing of the jet nozzle 300 is not affected by changes in the thickness of the buried material or changes in the rotation angle of the stirring shaft 200. At the same time, based on the venturi structure on the jet nozzle cover, during the jetting airflow process of the jet nozzle 300, the low-pressure zone generated by the high-speed jetting airflow can quickly carry out the material that enters the jet nozzle cover and damper before the jet nozzle 300 is vented, preventing the jet nozzle 300 from being blocked.

[0064] Furthermore, the jet nozzle 300 is fitted with a rubber air leak on its jet pipe. The rubber air leak includes at least two flat sleeves that can be attached together. When no air passes through the jet nozzle 300, the two flat sleeves are pressed together under atmospheric pressure to prevent material and leachate buried on top of the jet nozzle 300 from entering the jet nozzle cover and damper and then entering the jet nozzle 300, thus preventing blockage of the jet nozzle 300 opening.

[0065] In addition, the present invention also discloses a biochemical treatment system, characterized in that it includes an intake fan 500, a heat exchanger 501 and the biochemical treatment device as described above, so as to provide an oxygen supplementation heat source to the biochemical treatment device through the intake fan 500 and the heat exchanger 501.

[0066] The heat exchanger 501 is connected to the intake fan 500 and the injection air passage 202 to introduce the air heated by the heat exchanger 501 into the injection air passage 202 of the stirring shaft 200. The heated air is then ejected through the jet nozzle 300 to heat and dry the inside of the material. On the other hand, the heat exchanger 501 is also connected to the intake fan 500 and the air distribution pipe 400. The air heated by the heat exchanger 501 enters the containment space of the stirring chamber 100 through the air outlet of the air distribution pipe 400 on the inner wall of the stirring chamber 100 to heat and dry the material by thermal convection, while simultaneously supplementing oxygen for the aerobic fermentation process of the material.

[0067] It should be understood that the biochemical treatment system provided by the present invention can open two air paths simultaneously, or selectively open one of the air paths. Any opening method that meets the usage requirements is within the protection scope of the present invention.

[0068] Optionally, in a specific embodiment of the present invention, when the moisture content of the material is ≥40%, the operating program in the central controller automatically selects the first air path. The intake fan 500 and the solenoid valve on the steam pipe supplying heat source (saturated steam) to the heat exchanger 501, as well as the first electric flange butterfly valve, are turned on, and the second electric flange butterfly valve is closed after a 5-second delay. The air heated by the heat exchanger 501 passes through the rotary joint 205 and enters the jet air path 202 of the stirring shaft 200. Finally, it is ejected by 34 jet nozzles 300 fixed on the stirring shaft 200, which spray air from the inside of the material to the outside in a jet airflow impact manner, impacting the material, heating and drying the material, supplementing oxygen for aerobic fermentation, and serving as a carrier for the water vapor escaping from the material in the stirring chamber 100. During the process operation, the water vapor and dust generated by the material are discharged from the stirring chamber 100 by the exhaust fan 900 and the dust collector 902 described below.

[0069] When the material moisture content is <40%, the central controller's operating program automatically selects the second air path. The intake fan 500 remains on, and the solenoid valve on the steam pipe supplying heat source (saturated steam) to the heat exchanger 501 remains on. The second electric flange butterfly valve is opened, and the first electric flange butterfly valve is closed after a 5-second delay. The heated air passes through the second electric flange butterfly valve and enters the air distribution pipe 400 fixed on the inner wall of the mixing chamber 100. Finally, it is blown out from the air outlet of the air distribution pipe 400, heating and drying the material by thermal convection, while simultaneously supplementing oxygen for aerobic fermentation and serving as a carrier for water vapor escaping from the material in the mixing chamber 100. During the process, the water vapor and dust generated by the material are discharged from the mixing chamber 100 by the exhaust fan 900 and the dust collector 902, as described below.

[0070] When the fermentation and drying steps of the material are completed and the material moisture content is <13%, the biochemical treatment system enters the material cooling stage. The central controller's operating program still automatically runs the second air path. The intake fan 500 remains open, the solenoid valve on the steam pipe supplying heat source (saturated steam) to the heat exchanger 501 is closed, the second electric flange butterfly valve remains open, and the first electric flange butterfly valve remains closed. Unheated air (room temperature) passes through the second electric flange butterfly valve and enters the air distribution pipe 400 fixed on the inner wall of the mixing chamber 100. Finally, it is blown out from the air outlet of the air distribution pipe 400 to cool and dry the material by thermal convection, and at the same time serves as a carrier for the water vapor escaping from the material in the mixing chamber 100. During the process operation, the water vapor and dust generated by the material are discharged from the mixing chamber 100 by the exhaust fan 900 and the dust collector 902 described below.

[0071] Furthermore, the aforementioned biochemical treatment system also includes a steam generating device and a steam distribution cylinder 600, which divides the steam generated by the steam generating device through the steam distribution cylinder 600. Specifically, after passing through the steam distribution cylinder 600, a portion of the steam generated in the steam generating device enters the flow space formed by the first shell 101 and the second shell 102 of the biochemical treatment device to serve as a heat source for heating the material in the stirring chamber 100; the other portion enters the heat exchanger 501 to serve as a heat source for heating the air in the heat exchanger 501.

[0072] In addition, the above-mentioned biochemical treatment system also includes a feeding device 700 and a discharging device 800, so that the feeding device 700 can convey materials into the mixing chamber 100. After the materials reach the product quality requirements in terms of biohumic acid content, moisture content and temperature, the materials are continuously discharged from the mixing chamber 100 through the discharging device 800 under the stirring action of the rake blades 201, thus completing the discharge process.

[0073] Furthermore, the aforementioned biochemical treatment system also includes an exhaust fan 900, an exhaust duct 901, and a dust collector 902. The exhaust duct 901 connects the exhaust fan 900 and the exhaust port of the mixing chamber 100 to extract exhaust gas from the containment space of the mixing chamber 100 through the exhaust fan 900 and the exhaust duct 901, working together with the intake fan 500 to create convection within the mixing chamber 100. The dust collector 902 is located between the exhaust fan 900 and the exhaust port to filter water vapor and dust generated during the heating process of the material.

[0074] It should be noted that the air volume and temperature of the intake fan 500 affect the gas moisture carrying capacity and heat exchange effect. When the air volume of the intake fan 500 is constant, the negative pressure in the mixing chamber 100 (usually around -5 to -20 Pa) is determined by the speed of the exhaust fan 900. The speed of the exhaust fan 900 is adjusted by the PLC of the central controller through the frequency converter. Under the control of the PLC of the central controller, the dust collector 902 and the exhaust fan 900 operate automatically according to the set logic control program and process parameters, and can realize both manual and automatic operation control modes.

[0075] The biochemical treatment system provided by this invention also includes a condensate tank 1000, which is connected to the flow space of the heat exchanger 501 and the mixing chamber 100 to receive the condensate discharged from the heat exchanger 501 and the mixing chamber 100. The biochemical treatment system provided by this invention has been put into use. Taking a food waste treatment plant with a total processing capacity of 100 tons / day as an example, a comparison is made using a biochemical treatment system of the same specifications:

[0076] I. Existing Biochemical Processing Machines

[0077] The start-up and fermentation time is 10–12 hours, the drying time is 2.5–3.2 hours, the cooling time is 2.0 hours, and the operating cycle is 14.5–17.2 hours per batch.

[0078] 1. Steam cost: calculated at 260 yuan / ton of steam.

[0079] Each furnace consumes 5.5 to 6.5 tons of steam, and each ton of material consumes 0.733 to 0.866 tons of steam.

[0080] The cost of steam consumed per ton of material is (0.733×260~0.866×260)=(190.58~225.16) yuan / ton;

[0081] Daily steam consumption cost = (190.58~225.16) yuan / ton × 100 tons / day = (19058~22516) yuan / day.

[0082] 2. Electricity Costs: Based on a total power of approximately 55kW for the biochemical treatment system and an electricity cost of 0.7 yuan / kWh, the following costs are calculated:

[0083] The energy consumed per furnace is (14.5h × 55kw ~ 17.2h × 55kw) = (797.5 ~ 946) kWh;

[0084] Energy consumption per ton of material: (797.5 / 7.5~946 / 7.5) kWh = (106.33~126.13) kWh

[0085] The cost of electricity consumed per ton of material is (106.33×0.7~126.13×0.7)=(74.43~88.29) yuan / ton;

[0086] Daily electricity cost = (74.43~88.29) yuan / ton × 100 tons / day = (7743~8829) yuan / day.

[0087] II. Biochemical treatment system using the present invention

[0088] The start-up and fermentation time is 7-8 hours, the drying time is 2.0-2.5 hours, the cooling time is 1.5 hours, and the operating cycle is 10.5-12 hours per batch.

[0089] 1. Steam cost: calculated at 260 yuan / ton of steam.

[0090] Each furnace consumes 4.3–5.5 t of steam, and each ton of material consumes 0.573–0.733 t of steam.

[0091] The cost of steam consumed per ton of material is (0.573×260~0.733×260)=(148.98~190.58) yuan / ton;

[0092] Daily steam consumption cost = (148.98~190.58 yuan / ton × 100 tons / day = (14898~19058) yuan / day).

[0093] 2. Electricity Costs: Based on the total power of the biochemical treatment machine being approximately 55kW and the electricity cost at a unit price of 0.7 yuan / kWh, then...

[0094] The energy consumed per furnace is (10.5h × 55kw ~ 12h × 55kw) = (577.5 ~ 660) kWh;

[0095] Energy consumption per ton of material: (577.5 / 7.5~660 / 7.5) kWh = (77~88) kWh

[0096] The cost of electricity consumed per ton of material is (77×0.7~88×0.7)=(58.9~61.6) yuan / ton;

[0097] Daily electricity cost = (58.9~61.6) yuan / ton × 100 tons / day = (5890~6160) yuan / day.

[0098] III. Beneficial Effects of the Invention

[0099] Based on the station operating for 300 days per year,

[0100] Steam savings: (19058~22516) yuan / day - (14898~19058) yuan / day = (4160~3458) yuan / day;

[0101] It can save (4160~3458)×300 yuan / year, and an average of 1.548 million yuan per year;

[0102] Electricity cost savings: (7743~8829) yuan / day - (5890~6160) yuan / day = (1853~2669) yuan / day;

[0103] It can save (1853~2669)×300 yuan per year, and an average of 678,300 yuan per year.

[0104] Therefore, it can be seen that by adopting the biochemical treatment system provided by this invention, without considering the labor costs and maintenance costs saved due to the reduction in the operating time of the biochemical treatment machine, only the reduction in "steam consumption" and "electricity consumption" is calculated, which can save 2.22 million yuan per year, greatly improving economic efficiency.

[0105] The terms "first" and "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed.

[0106] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A biochemical treatment device, characterized in that, include: The mixing chamber is provided with a feed inlet, a discharge outlet and an exhaust outlet, as well as a receiving space for containing materials; A stirring shaft is rotatably disposed within the accommodating space. The stirring shaft is provided with multiple rake blades, and an air jet passage is opened along its axial direction inside the stirring shaft. The air jet passage can be connected to the oxygen supplementation heat gas source. An air jet nozzle cover is provided on the stirring shaft, and the air jet nozzle is located in the air jet nozzle cover. The air jet nozzle cover is provided with a Venturi structure damper. An air nozzle is mounted on the stirring shaft and connects the receiving space and the injection air path. The air nozzle is designed to be arranged within the same axial section of each rake blade, rotated 40° angularly along the rotation direction. The leftmost and rightmost ends of the stirring chamber are not equipped with the air nozzle; installation begins from the second rake blade at each end. A rubber air leak is fitted around the air nozzle. The rubber air leak includes at least two flat sleeves that can adhere together under atmospheric pressure. as well as The air distribution duct is connected to the oxygen supplementation heat source, and the air outlet of the air distribution duct is located on the inner wall of the mixing chamber. It also includes a first electric butterfly valve, a second electric butterfly valve, and a central controller. The first electric butterfly valve is installed on the connecting pipeline between the injection gas path and the oxygen supplementation heat source, and the second electric butterfly valve is installed on the connecting pipeline between the air distribution pipe and the oxygen supplementation heat source. Both the first electric butterfly valve and the second electric butterfly valve are communicatively connected to the central controller. It also includes a rotary joint that connects the stirring shaft and a pipeline for supplying supplemental oxygen heat.

2. The biochemical treatment device according to claim 1, characterized in that, The stirring chamber includes a first shell and a second shell, with the second shell disposed outside the first shell to form a flow space between the first shell and the second shell that allows the supply of heat source to flow. The bottom of the flow space is provided with a condensate drain outlet.

3. The biochemical treatment device according to claim 1, characterized in that, The rake blades include a first set of rake blades and a second set of rake blades. The first set of rake blades and the second set of rake blades are symmetrically arranged along the center plane of the stirring shaft, and the first set of rake blades and the second set of rake blades are arranged at opposite angles on the stirring shaft.

4. The biochemical treatment device according to claim 1, characterized in that, It also includes a drive unit and a sprocket transmission mechanism. The drive unit is used to drive the sprocket in the sprocket transmission mechanism to rotate. The sprocket transmission mechanism is used to transmit the power of the drive unit to the stirring shaft. The drive unit is communicatively connected to the central controller.

5. A biochemical treatment system, characterized in that, Includes an intake fan, a heat exchanger, and the biochemical treatment device as described in claim 2; The heat exchanger is connected to the intake fan and the injection air path on one side, and to the intake fan and the air distribution pipe on the other side, and the heat exchanger can be connected to the heat source.

6. The biochemical treatment system according to claim 5, characterized in that, It also includes a steam generation device and a steam distribution cylinder; The steam generated in the steam generating device flows through the steam distribution cylinder, and a portion of it enters the flow space formed by the first and second shells of the biochemical treatment device to heat the material in the mixing chamber as a heat source; the other portion enters the heat exchanger to heat the air in the heat exchanger as a heat source.

7. The biochemical treatment system according to claim 5, characterized in that, It also includes a feeding device and a discharging device. The feeding device is used to convey materials to the inlet of the biochemical treatment device, and the discharging device is used to receive and convey the materials discharged from the outlet of the biochemical treatment device.

8. The biochemical treatment system according to claim 5, characterized in that, It also includes an exhaust fan, an exhaust duct, and a dust collector. The exhaust duct connects the exhaust fan and the exhaust port of the mixing chamber, and the dust collector is located between the exhaust fan and the exhaust port.

9. The biochemical treatment system according to claim 5, characterized in that, It also includes a condensate tank, which is connected to the flow space of the heat exchanger and the stirring chamber.

Images