Coal gangue bio-fertilizer mixed fermentation device

CN224832540UActive Publication Date: 2026-10-09平凉市产品质量监督检验中心
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202522447351.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-11-19
Publication Date
2026-10-09
Estimated Expiration
2035-11-19

AI Technical Summary

Technical Problem

[0004]上述的一种生物肥固体发酵罐,其罐体上端设置有出气管,出气管上端部安装有排气扇,排气扇的下端、出气管的内部安装有活性炭过滤网,通过排气扇将发酵罐内的气体抽入到出气管中,而后使其通过活性炭过滤网过滤后排入到外环境中,但是生物肥发酵的过程会产生恶臭气体,该部分恶臭气体是无法被活性炭过滤网所净化的,因此排放出来的气体仍然存在较大的恶臭刺激性气味,且活性炭过滤网设置于排气管的内部,而活性炭过滤网又属于耗材,因此难以对其进行更换的问题;以及,其罐体的上端还安装有处理箱,处理箱内安装有粉碎刀片和粉碎电机以及过滤网,在粉碎电机的动力支持下,使粉碎刀片对生物肥料原料进行破碎,而后通过过滤网过滤后直接输入到下方的罐体中,但是处理箱与罐体之间直接连通,在原料流入到罐体内的过程中,会有大量的恶臭的刺激性气体从罐体内返入到处理箱中,而处理箱又为敞口式结构,因此该部分恶臭的刺激性气体会通过处理箱直接散发出罐体,造成逸散的问题

Benefits of technology

[0016]1、本实用新型通过设置破碎组件和净化组件,破碎组件包括设置在箱盖上方的破碎箱,以及安装在破碎箱内的破碎轮,通过破碎轮对进入到其中的煤矸石生物肥料进行破碎,并将破碎箱内环境通过输气管与净化箱连通,由此将破碎箱中的气体抽入到净化箱中,由于净化箱内设置有清水和净化板,且输气管又与净化箱中的进气管一连接,进气管一的末端又置于液面之下,进而通过进气管一输入到净化箱内的破碎箱内的气体可被水洗,并水洗后的气体还与净化板接触后才可实现排放,由此实现对该破碎箱内的气体进行净化。

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224832540U_ABST
    Figure CN224832540U_ABST
Patent Text Reader

Abstract

The utility model discloses a kind of coal gangue biofertilizer mixed fermentation device for being related to biological fertilizer production equipment technical field.The utility model includes fermentation tank;The upper end portion cover of fermentation tank is equipped with tank cover, the inside of fermentation tank is provided with mixing subassembly, tank cover is also provided with purification subassembly, crushing subassembly and exhaust component, purification subassembly includes the purification tank installed on tank cover, the upper end of purification tank is inserted with purification board, crushing subassembly includes the crushing tank being set in the side of purification tank, and the crushing wheel being installed in crushing tank, crushing tank is also communicated with purification tank by gas pipe, exhaust component includes the exhaust pipe being set in the side of purification tank, and fermentation tank is communicated with purification tank by exhaust pipe.The utility model mixes and mixes coal gangue biofertilizer raw materials in fermentation tank by mixing subassembly, raw materials are crushed by crushing subassembly, and the gas in crushing tank and the gas in fermentation tank are input into purification tank, realize the effect of washing and purification.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model belongs to the technical field of bio-fertilizer production equipment, and in particular relates to a mixed fermentation device for coal gangue bio-fertilizer. Background Technology

[0002] Coal gangue bio-fertilizer is a type of fertilizer that transforms coal gangue into a highly efficient and environmentally friendly fertilizer through microbial activation technology. It combines the functions of resource recycling and soil improvement. The production process of coal gangue bio-fertilizer requires mixing and fermentation.

[0003] Chinese patent application CN215102917U discloses a solid bio-fertilizer fermentation tank, including a supporting base plate and a tank body. A processing box is mounted on the tank body. A crushing motor is mounted on the top side wall of the processing box. The output shaft of the crushing motor has a crushing shaft with crushing blades. A feed inlet is located at the top of the processing box, and a discharge hopper is located at the bottom. A stirring motor is mounted on the side of the tank body. The output shaft of the stirring motor has a stirring shaft one with longitudinal stirring paddles at both ends and a driving bevel gear. A second stirring shaft is rotatably mounted at the top and bottom of the tank body's inner cavity, with a transverse stirring paddle and a driven bevel gear at its end. A discharge pipe is located on the tank body. The advantages of this invention compared to existing technologies are: it can pre-crush and screen bio-fertilizer, ensure uniform mixing of bio-fertilizer, and facilitate unloading.

[0004] The aforementioned bio-fertilizer solid fermentation tank has an exhaust pipe at the top, with an exhaust fan installed at the upper end of the pipe. An activated carbon filter is installed inside the exhaust pipe and at the lower end of the exhaust fan. The exhaust fan draws gas from the fermentation tank into the exhaust pipe, where it is then filtered through the activated carbon filter before being released into the external environment. However, the bio-fertilizer fermentation process produces malodorous gases that cannot be purified by the activated carbon filter. Therefore, the emitted gas still retains a strong, pungent odor. Furthermore, the activated carbon filter is located inside the exhaust pipe, and since activated carbon filters are consumables, this process... The problem lies in the difficulty of replacing the raw materials; furthermore, the upper part of the tank is equipped with a processing box containing crushing blades, a crushing motor, and a filter screen. Powered by the crushing motor, the crushing blades break down the bio-fertilizer raw materials, which are then filtered and directly fed into the lower tank. However, the processing box is directly connected to the tank. During the flow of raw materials into the tank, a large amount of foul-smelling, irritating gases flow back from the tank into the processing box. Since the processing box is an open structure, these gases escape directly from the tank, causing a problem of leakage. Therefore, we provide a coal gangue bio-fertilizer mixed fermentation device to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a mixed fermentation device for coal gangue bio-fertilizer. The device uses a mixing component to stir and mix the coal gangue bio-fertilizer raw materials in the fermentation tank, and a crushing component to crush the raw materials. The gas in the crushing tank and the gas in the fermentation tank are then introduced into a purification tank to achieve the effects of water washing and purification, thus solving the problems of existing solid fermentation tanks for bio-fertilizer.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a mixed fermentation device for coal gangue bio-fertilizer, comprising a fermentation tank, on which a controller is embedded; a lid is provided at the top of the fermentation tank, and a mixing component is provided inside the fermentation tank. The mixing component includes a stirring shaft inserted into the fermentation tank and a mixing motor connected to the stirring shaft. A purification component, a crushing component, and an exhaust component are also provided on the lid. The purification component includes a purification box installed on the lid, with a purification plate inserted at the top of the purification box. The crushing component includes a crushing box located beside the purification box and a crushing wheel installed inside the crushing box. The crushing box is also connected to the purification box via a gas supply pipe. The exhaust component includes an exhaust pipe located beside the purification box, and the fermentation tank is connected to the purification box via the exhaust pipe.

[0008] The present invention is further configured such that a controller is embedded in the outer wall of the front side of the fermentation box, and a fermentation tank is provided inside the fermentation box. The two ends of the stirring shaft are rotatably engaged with the side wall of the fermentation tank. Multiple stirring impellers with an equidistant structure are installed on the stirring shaft, and one end of the stirring shaft passes through the side wall of the fermentation box and is connected to the output shaft of the mixing motor through a coupling.

[0009] The present invention is further configured such that an installation groove is provided at the center of the upper side wall of the box cover, the bottom of the purification box is installed in the fixing frame, and the purification box is set in the installation groove through the fixing frame.

[0010] The present invention is further configured such that a side slot is provided at the upper end of the purification box, a metal strip is inlaid on the rear side wall of the purification plate, a magnetic strip is inlaid on the rear side wall of the side slot corresponding to the metal strip, and the purification plate is connected to the magnetic strip by the metal strip. The upper side wall of the purification box is covered with a top cover, and an air vent is inlaid at the center of the top cover.

[0011] The present invention is further configured such that an air supply groove is provided at the upper end of the right side wall of the crushing box, and the crushing box is connected to one end of the air supply pipe through the air supply groove, and the other end of the air supply pipe is connected to the purification box through an air inlet pipe. The air inlet pipe is installed on the left side wall of the purification box, the air supply pipe is U-shaped, and a fan is installed at the center of the air supply pipe.

[0012] The present invention is further configured such that the box cover has an inlet, the bottom of the crushing box has an installation frame, and the crushing box is connected to the inlet through the installation frame. The upper end of the crushing box is equipped with a cover plate, and the center of the crushing wheel is equipped with a wheel axle, which passes through the crushing box and is connected to the output shaft of the crushing motor.

[0013] The present invention is further configured such that an air outlet is provided on the box cover, a connecting plate is provided at one end of the exhaust pipe, and the exhaust pipe is connected to the air outlet on the box cover through the connecting plate, and the exhaust pipe is U-shaped.

[0014] The present invention is further configured such that the other end of the exhaust pipe is connected to the purification box through the second air inlet pipe, and the second air inlet pipe is installed on the right side wall of the purification box. An equipment pipe is also provided in the middle of the exhaust pipe, and a second fan is installed inside the equipment pipe. An opening and closing plate is also provided on the top of the second fan.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model sets up a crushing component and a purification component. The crushing component includes a crushing box set above the box cover and a crushing wheel installed inside the crushing box. The crushing wheel crushes the coal gangue bio-fertilizer that enters the box. The environment inside the crushing box is connected to the purification box through a gas supply pipe, thereby drawing the gas from the crushing box into the purification box. Since the purification box is equipped with clean water and a purification plate, and the gas supply pipe is connected to an air inlet pipe in the purification box, with the end of the air inlet pipe placed below the liquid surface, the gas from the crushing box that enters the purification box through the air inlet pipe can be washed with water. The washed gas then comes into contact with the purification plate before being discharged, thereby purifying the gas inside the crushing box.

[0017] 2. This utility model incorporates an exhaust assembly and a purification assembly. The purification assembly includes a purification tank containing clean water and a purification plate inserted into the upper part of the purification tank. A metal strip is provided on the rear side wall of the purification plate, and a magnetic strip is embedded in the inner wall of the purification tank corresponding to the metal strip. The magnetic strip attracts the metal strip, thus fixing the purification plate and allowing it to be easily pulled out when under force, facilitating the replacement of the purification plate. The exhaust assembly includes an exhaust pipe installed on the tank cover, which connects the environment inside the fermentation tank with the purification tank. The end of the exhaust pipe is connected to an air inlet pipe II in the purification tank, with the end of the air inlet pipe II positioned below the liquid surface. This allows the gas from the fermentation tank to be introduced into the purification tank below the liquid surface, meaning the purification tank can wash the gas entering it. The washed gas then needs to be purified by the purification plate before being discharged, thus achieving the effect of purifying the discharged gas. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of a mixed fermentation device for coal gangue bio-fertilizer.

[0020] Figure 2 This is a structural disassembly diagram of a coal gangue bio-fertilizer mixed fermentation device.

[0021] Figure 3 This is a structural disassembly diagram of the purification component.

[0022] Figure 4 This is a structural disassembly diagram of the crushing component.

[0023] Figure 5 This is a structural disassembly diagram of the exhaust assembly.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1-Fermentation box, 101-Fermentation tank, 2-Controller, 3-Box cover, 301-Mounting slot, 302-Inlet, 303-Outlet, 4-Mixing component, 401-Mixing motor, 402-Stirring shaft, 403-Stirring impeller, 5-Purification component, 501-Purification box, 501a-Side slot, 501b-Inlet pipe one, 501c-Inlet pipe two, 502-Fixing frame, 503-Purification plate, 503a-Metal strip, 503b-Magnetic Suction bar, 504-top cover, 504a-air outlet window, 6-crushing assembly, 601-crushing box, 601a-air supply channel, 602-mounting frame, 603-cover plate, 604-crushing wheel, 604a-wheel axle, 604b-crushing motor, 605-air supply pipe, 605a-fan one, 7-exhaust assembly, 701-mounting base, 702-connecting plate, 703-exhaust pipe, 704-equipment pipe, 704a-opening and closing plate, 705-fan two. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0027] Example 1

[0028] Please see Figure 1-2 This utility model is a mixed fermentation device for coal gangue bio-fertilizer, including a fermentation tank 1, a mixing component 4, and a purification component 5. The mixing component 4 includes a stirring shaft 402 and a stirring impeller 403 installed in the fermentation tank 1. With the power support of a mixing motor 401, the stirring shaft 402 and the stirring impeller 403 can be driven to rotate in the fermentation tank 1, thereby stirring the coal gangue bio-fertilizer entering the fermentation tank 1 to make it fully mixed. The purification component 5 includes a purification tank 501 storing clean water and a purification plate 503 inserted into the upper end of the purification tank 501. The gas entering the purification tank 501 can be washed with water, and the washed gas still needs to be purified by the purification plate 503 before it can be discharged, thereby achieving the effect of purifying the discharged gas.

[0029] Specifically, the fermentation box 1 is equipped with a fermentation tank 101 inside, and a controller 2 is embedded in the front outer wall of the fermentation box 1, and a box cover 3 is provided on the top.

[0030] Furthermore, the mixing component 4 includes a stirring shaft 402 disposed in the fermentation tank 101, with both ends of the stirring shaft 402 rotatably engaged with the left and right side walls of the fermentation tank 101, and multiple stirring impellers 403 evenly spaced on the stirring shaft 402. The right end of the stirring shaft 402 extends out of the right side wall of the fermentation tank 1 and is connected to the output shaft of the mixing motor 401 through a coupling. This enables the stirring impellers 403 to rotate via the stirring shaft 402 under the power support of the mixing motor 401, thereby achieving the effect of stirring and turning the raw materials in the fermentation tank 101, promoting the mixing of the raw materials.

[0031] An installation groove 301 is provided at the center of the upper side wall of the box cover 3. The purification component 5 includes a fixing frame 502 set in the installation groove 301, and a purification box 501 is installed on the fixing frame 502. A side slot 501a is provided at the upper end of the purification box 501. A purification plate 503 is set in the side slot 501a. A metal strip 503a is embedded in the rear side wall of the purification plate 503, and a magnetic strip 503b is embedded in the rear side wall of the side slot 501a. The purification plate 503 is fixed by the magnetic strip 503b adsorbing the metal strip 503a. The purification plate 503 can be easily pulled out when the purification plate 503 is under force, so as to facilitate the replacement of the purification plate 503. A top cover 504 is also provided on the top of the purification box 501, and an air outlet 504a is embedded in the top cover 504. The purification plate 503 is made of activated carbon purification material.

[0032] Example 2

[0033] Please see Figure 3-4 Based on embodiment 1, a crushing component 6 is also provided. The crushing component 6 includes a crushing box 601 disposed above the box cover 3 and a crushing wheel 604 installed inside the crushing box 601. The crushing wheel 604 crushes the coal gangue bio-fertilizer that enters it, and the environment inside the crushing box 601 is connected to the purification box 501 through the gas supply pipe 605, thereby drawing the gas in the crushing box 601 into the purification box 501 to purify the gas.

[0034] Specifically, the cover 3 has an inlet 302, and the crushing component 6 includes an installation frame 602 located above the inlet 302. A crushing box 601 is installed above the installation frame 602. The crushing box 601 is connected to the inlet 302 through the installation frame 602, and the crushed coal gangue bio-fertilizer raw material in the crushing box 601 is fed into the fermentation box 1 below through the installation frame 602. A cover plate 603 is also installed at the upper end of the crushing box 601 to keep the crushing box 601 in a closed environment.

[0035] Furthermore, the crushing box 601 is equipped with a crushing wheel 604 inside, and a wheel axle 604a is provided at the center of the crushing wheel 604. The end of the wheel axle 604a passes through the crushing box 601 and is connected to the output shaft of the crushing motor 604b. This enables the crushing of the coal gangue bio-fertilizer raw material entering the crushing box 601 under the power support of the crushing motor 604b.

[0036] An air supply trough 601a is provided on the upper right side wall of the crushing chamber 601, and an air supply pipe 605 is installed inside it. A fan 605a is installed in the middle of the air supply pipe 605. An air inlet pipe 501b is also installed on the left side wall of the purification chamber 501, and the air supply pipe 605 is connected to the purification chamber 501 through the air inlet pipe 501b. The air supply pipe 605 is U-shaped, which can effectively prevent liquid backflow. The fan 605a can quickly extract the gas in the crushing chamber 601 and put it into the purification chamber 501.

[0037] The operation process of this embodiment is as follows: When in use, first open the cover plate 603 and put the coal gangue bio-fertilizer raw material into the crushing box 601. Start the crushing motor 604b. The crushing motor 604b drives the crushing wheel 604 to rotate through the wheel axle 604a, thereby achieving the effect of crushing the coal gangue bio-fertilizer raw material in the crushing box 601. The crushed raw material falls into the fermentation box 1 below through the feed port 302 through the gap of the crushing wheel 604. Since the fermentation box 1 is connected to the crushing box 601, the irritating gas in the environment of the fermentation box 1 and the dust generated during the crushing process of the crushing box 601 are all drawn away by the fan 605a, and this part of the mixed gas enters the gas supply pipe 605. Through the gas supply pipe 605 and the air inlet pipe 501b, it enters the purification box 501 below the liquid level. After being washed by the water in the purification box 501, it comes into contact with the purification plate 503 again, and finally is discharged into the external environment through the air outlet 504a.

[0038] Example 3

[0039] Please see Figure 3 and Figure 5 Based on Embodiments 1 and 2, an exhaust assembly 7 is also provided. The exhaust assembly 7 includes an exhaust pipe 703 disposed on the box cover 3. The exhaust pipe 703 connects the internal environment of the fermentation box 1 with the purification box 501 to achieve the effect of purifying the exhaust gas.

[0040] Specifically, the upper side wall of the cover 3 is provided with an air outlet 303, and an exhaust assembly 7 is provided on the air outlet 303. The exhaust assembly 7 includes a mounting base 701 provided on the air outlet 303, and a connecting plate 702 is provided on the mounting base 701. The mounting base 701 is connected to one end of the exhaust pipe 703 through the connecting plate 702.

[0041] Furthermore, an air inlet pipe 501c is provided on the right side wall of the purification box 501, and the air inlet pipe 501c is connected to the other end of the exhaust pipe 703. The exhaust pipe 703 is U-shaped, which can effectively prevent liquid backflow.

[0042] An equipment pipe 704 is also provided in the middle of the exhaust pipe 703. A second fan 705 is installed inside the equipment pipe 704. The second fan 705 accelerates the speed at which the gas in the fermentation box 1 enters the purification box 501 through the exhaust pipe 703. Furthermore, an opening and closing plate 704a is provided on the top of the equipment pipe 704 to facilitate the maintenance of the second fan 705.

[0043] The operation process of this embodiment is as follows: When the fan 705 is working, since the exhaust pipe 703 is connected to the environment inside the fermentation tank 1, it will draw the gas in the environment inside the fermentation tank 1 into the exhaust pipe 703 when it is working. The gas is then input into the purification tank 501 below the liquid level through the exhaust pipe 703 and the air inlet pipe 501c. After being washed by water in the purification tank 501, the gas comes into contact with the purification plate 503 again, and finally is discharged into the external environment through the air outlet 504a.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A device for mixed fermentation of coal gangue bio-fertilizer, comprising a fermentation tank (1), wherein a controller (2) is embedded in the front side wall of the fermentation tank (1); characterized in that: The fermentation chamber (1) is covered with a lid (3) at its upper end. A mixing assembly (4) is installed inside the fermentation chamber (1). The mixing assembly (4) includes a stirring shaft (402) inserted into the fermentation chamber (1) and a mixing motor (401) connected to the stirring shaft (402). A purification assembly (5), a crushing assembly (6), and an exhaust assembly (7) are also installed on the lid (3). The purification assembly (5) includes a purification chamber (501) mounted on the lid (3). 1) The upper end is connected to a purification plate (503). The crushing component (6) includes a crushing box (601) set on the side of the purification box (501) and a crushing wheel (604) installed in the crushing box (601). The crushing box (601) is also connected to the purification box (501) through a gas supply pipe (605). The exhaust component (7) includes an exhaust pipe (703) set on the side of the purification box (501), and the fermentation box (1) is connected to the purification box (501) through the exhaust pipe (703).

2. The device for mixed fermentation of coal gangue bio-fertilizer according to claim 1, characterized in that, A controller (2) is embedded in the outer wall of the front side of the fermentation box (1), and a fermentation tank (101) is provided inside the fermentation box (1). The two ends of the stirring shaft (402) are rotatably engaged with the side wall of the fermentation tank (101). Multiple stirring impellers (403) with equal spacing are installed on the stirring shaft (402), and one end of the stirring shaft (402) passes through the side wall of the fermentation box (1) and is connected to the output shaft of the mixing motor (401) through a coupling.

3. The device for mixed fermentation of coal gangue bio-fertilizer according to claim 1, characterized in that, An installation groove (301) is provided at the center of the upper side wall of the box cover (3). The bottom of the purification box (501) is installed in the fixing frame (502), and the purification box (501) is set in the installation groove (301) through the fixing frame (502).

4. The device for mixed fermentation of coal gangue bio-fertilizer according to claim 1, characterized in that, The purification box (501) has a side slot (501a) at its upper end. A metal strip (503a) is inlaid on the rear side wall of the purification plate (503). A magnetic strip (503b) is inlaid on the rear side wall of the side slot (501a) corresponding to the metal strip (503a). The purification plate (503) is connected to the magnetic strip (503b) by the metal strip (503a). The upper side wall of the purification box (501) is covered with a top cover (504), and an air vent (504a) is inlaid at the center of the top cover (504).

5. A device for mixed fermentation of coal gangue bio-fertilizer according to claim 1, characterized in that, An air supply groove (601a) is provided on the upper part of the right side wall of the crushing box (601), and the crushing box (601) is connected to one end of the air supply pipe (605) through the air supply groove (601a). The other end of the air supply pipe (605) is connected to the purification box (501) through the first air inlet pipe (501b). The first air inlet pipe (501b) is installed on the left side wall of the purification box (501). The air supply pipe (605) is U-shaped, and a fan (605a) is installed at the center of the air supply pipe (605).

6. The device for mixed fermentation of coal gangue bio-fertilizer according to claim 1, characterized in that, The box cover (3) has an inlet (302), the bottom of the crushing box (601) is provided with an installation frame (602), and the crushing box (601) is connected to the inlet (302) through the installation frame (602). The upper end of the crushing box (601) is provided with a cover plate (603), and the center of the crushing wheel (604) is provided with a wheel axle (604a), and the wheel axle (604a) passes through the crushing box (601) and is connected to the output shaft of the crushing motor (604b).

7. A device for mixed fermentation of coal gangue bio-fertilizer according to claim 1, characterized in that, The box cover (3) has an air outlet (303), and one end of the exhaust pipe (703) is provided with a connecting plate (702). The exhaust pipe (703) is connected to the air outlet (303) on the box cover (3) through the connecting plate (702). The exhaust pipe (703) is U-shaped.

8. A device for mixed fermentation of coal gangue bio-fertilizer according to claim 7, characterized in that, The other end of the exhaust pipe (703) is connected to the purification box (501) through the second air inlet pipe (501c), and the second air inlet pipe (501c) is installed on the right side wall of the purification box (501). An equipment pipe (704) is also provided in the middle of the exhaust pipe (703), and a second fan (705) is installed inside the equipment pipe (704). An opening and closing plate (704a) is also provided on the top of the second fan (705).

Citation Information

Patent Citations

  • Biological fertilizer solid fermentation tank

    CN215102917U