Tailgate acid pretreatment device and system

Abstract

The utility model relates to the field of agricultural biotechnology provides a tail vegetable acid pretreatment device and system, and the pretreatment device includes: the pretreatment jar is equipped with the feeding opening, the discharge gate and the residue gate, the acid adding module is connected with the pretreatment jar, is used for adding the acid liquid to the pretreatment jar, the bubbling pipe is arranged in the bottom in the pretreatment jar and is equipped with the air hole, is used for and the compressed gas device connection to the pretreatment jar in the air current that drums in to the material stirring. Such setting, through adding dilute acid pretreatment in tail vegetable, can dissolve hemicellulose, destroy lignocellulose internal structure, improve tail vegetable straw porosity to increase the accessibility of cellulose, to improve the subsequent enzymolysis or fermentation efficiency. Meanwhile in the pretreatment stage, utilize the air current that drums in to the pretreatment jar stirring with the bubbling pipe, prevent the pretreatment effect of the problem such as not good caused by local acid concentration deficiency or material accumulation, has the advantages such as acid liquid distribution uniform, reaction efficiency is high, degradation is thorough.

Description

Technical Field

[0001] This utility model relates to the field of agricultural biotechnology, and in particular to a vegetable acid pretreatment device and system. Background Technology

[0002] Vegetable waste is one of the main organic wastes generated in agricultural production, processing, and distribution, accounting for more than 30% of the total output of the fruit and vegetable industry chain, but the effective treatment rate is less than 50%. Large quantities of vegetable waste are randomly piled up or landfilled, causing environmental pollution and resource waste such as leachate pollution and malodorous gas emissions.

[0003] Anaerobic digestion is a common method for the centralized treatment of agricultural waste, achieving both volume reduction and harmless disposal. It is a way to provide high-value-added transformation of agricultural waste. The process includes collection, physical crushing, addition of auxiliary materials, and microbial fermentation. The final product, such as agricultural enzymes, has antibacterial, soil-improving, and crop-growth-promoting effects.

[0004] However, vegetable waste is a tightly interwoven structure of cellulose, hemicellulose and lignin. Even after physical crushing, it still causes a series of problems when applied to a fermentation system, such as slow start-up, excessively long fermentation time and low fermentation efficiency.

[0005] Therefore, how to improve the pre-processing efficiency of waste vegetables has become an important problem that urgently needs to be solved. Utility Model Content

[0006] This invention provides a vegetable tail acid pretreatment device and system to solve the defects of slow fermentation start-up, excessively long fermentation time and low fermentation efficiency in the prior art. By adding dilute acid to the vegetable tail, the hemicellulose is dissolved, the internal structure of lignocellulose is destroyed, and the porosity of the vegetable tail is improved to increase the accessibility of cellulose, thereby improving the enzymatic hydrolysis efficiency in the subsequent preparation of enzymes.

[0007] This utility model provides a vegetable tail acid pretreatment device, comprising:

[0008] The pretreatment tank is equipped with a feed port, a discharge port, and a slag discharge port;

[0009] An acid addition module, connected to the pretreatment tank, is used to add acid solution into the pretreatment tank;

[0010] A bubbling tube is arranged at the bottom of the pretreatment tank, and the bubbling tube is provided with air holes; the bubbling tube is used to connect to a compressed air device to blow air into the pretreatment tank to stir the material.

[0011] According to the present invention, a vegetable waste acid pretreatment device is provided, wherein the acid addition module includes:

[0012] An acid storage tank, located outside the pretreatment tank, is used to store acid solution;

[0013] An acid supply pipe has one end connected to the acid storage tank via an acid delivery pipe, and the other end extends into the pretreatment tank.

[0014] A control valve, connected to the acid delivery pipe, is used to control the flow rate of the acid solution.

[0015] According to the present invention, a vegetable waste acid pretreatment device is provided, wherein the acid addition module further includes:

[0016] A pH probe is located inside the pretreatment tank and is used to monitor and provide feedback on the pH value signal inside the pretreatment tank.

[0017] The pH controller is connected to the pH probe and the control valve to receive the pH value signal and adjust the opening of the control valve based on the pH value signal and the set pH value range, so that the pH value in the pretreatment tank is maintained within the set range.

[0018] According to the present invention, a vegetable acid pretreatment device is provided, which further includes a heating module for heating the material in the pretreatment tank.

[0019] According to the present invention, a vegetable tail acid pretreatment device is provided, wherein the heating module includes:

[0020] A heat exchange jacket is provided outside the pretreatment tank, so that the heat exchange jacket and the pretreatment tank enclose each other to form a heat exchange jacket layer.

[0021] The circulating hot water inlet is connected to the heat exchange jacket and communicates with the heat exchange layer, and is used to connect to the outlet of the hot water circulation device.

[0022] The circulating hot water outlet is connected to the heat exchange jacket and communicates with the heat exchange layer, and is used to connect to the inlet of the hot water circulation device.

[0023] According to the present invention, a vegetable waste acid pretreatment device is provided, wherein the slag discharge port is located at the bottom of the pretreatment tank, and an automatic valve is provided on the slag discharge port.

[0024] According to the present invention, a vegetable waste acid pretreatment device is provided, wherein the pretreatment tank is provided with an exhaust port, which is used to connect to a waste gas collection and treatment device.

[0025] According to the present invention, a vegetable tail acid pretreatment device is provided, wherein there are two exhaust ports, and the two exhaust ports serve as backups for each other.

[0026] According to the present invention, a vegetable waste acid pretreatment device is provided, wherein the acid solution includes dilute sulfuric acid with a concentration of 5% to 15%.

[0027] This utility model also provides a vegetable tail acid pretreatment system, including the vegetable tail acid pretreatment device described in any one of the above-mentioned items;

[0028] It also includes a compressed air device, which is connected to the bubbling tube.

[0029] According to the utility model, a vegetable acid pretreatment system is also provided, which further includes a hot water circulation device and / or a waste gas collection and treatment device.

[0030] The hot water circulation device is connected to the vegetable acid pretreatment device;

[0031] The waste gas collection and treatment device is connected to the vegetable acid pretreatment device.

[0032] The present invention provides a vegetable waste acid pretreatment device and system. During pretreatment, the operator feeds the physically crushed vegetable waste (particle size ≤ 5cm) into the pretreatment tank through the feeding port, then closes the feeding port and injects acid solution into the pretreatment tank through the acid addition module. During the reaction, the materials in the tank naturally separate into layers: the upper layer is acid solution containing dissolved organic matter, and the lower layer is solid residue. At this time, the compressed air device is activated, and airflow is blown into the pretreatment tank through the bubble tube to stir the materials. Under the agitation of the airflow, the acid solution can come into more thorough contact with the vegetable waste, ensuring that the vegetable waste at different depths and in different areas can react evenly with the acid solution. This avoids problems such as uneven reaction and incomplete acid hydrolysis caused by static soaking or simple stirring, and significantly improves the degradation efficiency of hemicellulose and cellulose. After pretreatment, the liquid containing dissolved substances is discharged through the discharge port and can be directly used for subsequent enzymatic hydrolysis or fermentation processes. The solid residue (mainly lignin) is discharged through the slag discharge port at the bottom for further processing.

[0033] Compared to related technologies, pretreatment with dilute acid in vegetable waste can dissolve hemicellulose, disrupt the internal structure of lignocellulose, and improve the porosity of vegetable waste straw to increase cellulose accessibility, thereby improving the efficiency of subsequent fermentation or enzymatic hydrolysis. Simultaneously, during the pretreatment stage, the use of a bubble tube to blow air into the pretreatment tank for stirring ensures a more uniform and thorough acid hydrolysis reaction, preventing problems such as insufficient local acid concentration or material accumulation that lead to poor pretreatment results. This method offers advantages such as uniform acid distribution, high reaction efficiency, and thorough degradation. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a front view of the vegetable acid pretreatment device provided in this embodiment of the utility model.

[0036] Figure 2 This is a side view of the vegetable acid pretreatment device provided in this embodiment of the utility model.

[0037] Figure 3 This is a top view of the vegetable acid pretreatment device provided in this embodiment of the utility model.

[0038] Figure label:

[0039] 10. Pretreatment tank; 11. Feed port; 12. Discharge port; 13. Slag discharge port; 14. Exhaust port; 20. Acid addition module; 21. Acid storage tank; 22. Acid addition pipe; 23. Acid delivery pipe; 24. Control valve; 25. pH probe; 26. pH controller; 30. Bubble tube; 40. Heating module; 41. Heat exchange jacket; 42. Circulating hot water inlet; 43. Circulating hot water outlet. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] To better understand the vegetable waste acid pretreatment device and system provided in this utility model embodiment, its application background is first introduced. Vegetable waste is one of the main organic wastes generated in agricultural production, processing and circulation. Using vegetable waste to ferment and prepare liquid fertilizers such as agricultural enzymes is an effective way to provide high added value for agricultural waste.

[0042] However, vegetable waste has a tight structure made up of cellulose, hemicellulose and lignin. Even after physical crushing, it still suffers from a series of problems when used in a fermentation system, such as slow start-up, long fermentation time and low fermentation efficiency.

[0043] Therefore, how to improve the efficiency of waste vegetable pretreatment has become an important issue that urgently needs to be addressed.

[0044] In view of this, the present invention provides a vegetable tail acid pretreatment device and system, which increases the accessibility of cellulose by adding dilute acid to vegetable tails to dissolve hemicellulose, destroy the internal structure of lignocellulose, and improve the porosity of vegetable tails, thereby improving the efficiency of subsequent enzymatic hydrolysis or fermentation.

[0045] The following is combined with Figures 1 to 3 This invention describes the acid pretreatment device and system for vegetable waste.

[0046] Reference Figures 1 to 3 A vegetable waste acid pretreatment device includes a pretreatment tank 10, an acid addition module 20, and a bubbling pipe 30. The pretreatment tank 10 forms a container for vegetable waste acid pretreatment and is provided with a feed port 11, a discharge port 12, and a slag discharge port 13. The acid addition module 20 is connected to the pretreatment tank 10 and is used to add acid solution into the pretreatment tank 10. The bubbling pipe 30 is arranged at the bottom of the pretreatment tank 10 and is provided with air holes for connecting to a compressed air device to blow air into the pretreatment tank 10 to stir the material.

[0047] In practical applications, operators feed the physically crushed (particle size ≤ 5cm) waste material into the pretreatment tank 10 through the feed inlet 11, then close the feed inlet 11 and inject acid solution into the pretreatment tank 10 through the acid addition module 20. During the reaction, the materials in the tank naturally separate into layers: the upper layer is acid solution containing dissolved organic matter, and the lower layer is solid residue. At this time, the compressed air device is activated, and airflow is blown into the pretreatment tank 10 through the bubble tube 30 to stir the materials. Under the agitation of the airflow, the acid solution can come into more thorough contact with the waste material, ensuring that waste material at different depths and in different areas can react evenly with the acid solution. This avoids problems such as uneven reaction and incomplete acid hydrolysis caused by static soaking or simple stirring, significantly improving the degradation efficiency of hemicellulose and cellulose. After pretreatment, the liquid containing dissolved substances is discharged through the discharge outlet 12 and can be directly used for subsequent enzymatic hydrolysis or fermentation processes. The solid residue (mainly lignin) is discharged through the slag discharge outlet 13 at the bottom for further processing.

[0048] Compared to related technologies, pretreatment with dilute acid in vegetable waste can dissolve hemicellulose, disrupt the internal structure of lignocellulose, and improve the porosity of vegetable waste straw to increase cellulose accessibility, thereby improving the enzymatic hydrolysis efficiency during subsequent enzyme preparation. Simultaneously, during the pretreatment stage, airflow is blown into the pretreatment tank 10 using a bubble tube 30 for stirring, ensuring a more uniform and thorough acid hydrolysis reaction. This prevents problems such as insufficient local acid concentration or material accumulation leading to poor pretreatment results, offering advantages such as uniform acid distribution, high reaction efficiency, and thorough degradation.

[0049] It is understood that the specific material, shape, specifications and other parameters of the pretreatment tank 10 need to be designed in combination with actual production needs, and no specific restrictions are made in this embodiment of the utility model.

[0050] In one example of this utility model, the pretreatment tank 10 is a vertical structure, the feeding port 11 is located at the top of the pretreatment tank 10, and a sealing cover that can be opened and closed is provided on the feeding port 11. When feeding, the sealing cover is opened, allowing the operator to feed the leftover vegetables into the pretreatment tank 10 through the feeding port 11. After feeding is completed, the sealing cover is closed to prevent acid mist from overflowing from the feeding port 11.

[0051] In some feasible examples, the sealing cap and the pretreatment tank 10 can be fitted together in a completely separable manner, such as by flange connection, or in a partially separable manner, such as by hinged one side of the sealing cap to the pretreatment tank 10, while the other side can be flipped open around the hinge axis and fixed with a lock. In short, regardless of how the sealing cap and the pretreatment tank 10 are fitted together, as long as the opening and closing of the feeding port 11 can be achieved, it is acceptable. These embodiments of the present invention will not be listed one by one.

[0052] The discharge port 12 is located on the upper side of the pretreatment tank 10, and the slag discharge port 13 is located at the bottom of the pretreatment tank 10. Furthermore, the slag discharge port 13 and the discharge port 12 are located on the same side of the pretreatment tank 10. It can be understood that during the pretreatment stage, after the waste vegetables are fed into the tank through the feed port 11, the products are layered. The liquid part (containing dissolved organic matter from the waste vegetables, sulfuric acid residue, minerals, etc.) is located in the upper layer and can be recovered through the discharge port 12, while the solid residue (unhydrolyzed cellulose or lignin, acid-insoluble impurities, etc.) is located in the lower layer and can be recovered through the slag discharge port 13.

[0053] It should be noted that during the discharge stage, the upper liquid portion can be pumped out from the discharge port 12 using a pump. During the slag discharge stage, the solid residue at the bottom of the pretreatment tank 10 can be discharged from the slag discharge port 13 under its own gravity. To improve slag discharge efficiency, hydraulic or pneumatic flushing, vacuum suction, or other methods can be used to assist in slag discharge. In other words, the discharge and slag discharge methods of the pretreatment tank 10 can be implemented in various ways. These methods will not be listed in detail in this embodiment. The specific methods need to be flexibly designed according to actual production needs, and no specific limitations are imposed in this embodiment.

[0054] In a further example of this utility model, an automatic valve is provided on the slag discharge port 13, specifically including an electric valve or a pneumatic valve. With this configuration, the slag discharge port 13 can be opened and closed automatically as needed, improving the convenience of slag discharge.

[0055] Through the above technical solution, in the pretreatment stage, the sealing cover is opened and the operator puts the leftover vegetables to be treated into the pretreatment tank 10 through the feeding port 11. Then the feeding port 11 is closed and acid is injected into the pretreatment tank 10 through the acid addition module 20. After the reaction is completed, the liquid part is located in the upper layer and can be recovered by the discharge port 12, and the solid residue is located in the lower layer and can be recovered by the slag discharge port 13.

[0056] Specifically, the leftover vegetables to be processed should be the parts of the plant that have no commercial value, including roots, stems, leaves, rotten fruits, etc., and should be physically crushed to a particle size of less than 5cm.

[0057] In one example of this utility model, the bubbling tube 30 may include a main tube and multiple branch tubes; wherein, the main tube is arranged radially along the pretreatment tank 10, one end of the branch tube is connected to the main tube and the other end is closed, and the multiple branch tubes are arranged axially along the main tube, so that the multiple branch tubes cover the bottom of the pretreatment tank 10, and the vents are opened on the branch tubes to increase the distribution range of the airflow, so that the acid solution can be more evenly distributed during stirring and the acid hydrolysis reaction efficiency can be improved.

[0058] Of course, the bubbling tube 30 is not limited to the structural forms listed above. Other structural forms of the bubbling tube 30 that can meet the stirring requirements are also applicable. They will not be listed one by one in this embodiment of the utility model.

[0059] In one example of this utility model, the acid addition module 20 includes an acid storage tank 21, an acid addition pipe 22, and a control valve 24; wherein, the acid storage tank 21 is disposed outside the pretreatment tank 10 and is used to store acid liquid; one end of the acid addition pipe 22 is connected to the acid storage tank 21 through an acid delivery pipe 23, and the other end extends into the pretreatment tank 10; the control valve 24 is connected to the acid delivery pipe 23 and is used to control the flow rate of the acid liquid.

[0060] Specifically, the acid solution is dilute sulfuric acid with a concentration of 5% to 15%. The acid addition pipe 22 is erected on the top of the pretreatment tank 10 and its bottom end is inserted into the pretreatment tank 10. The part of the acid addition pipe 22 outside the pretreatment tank 10 is connected to the acid storage tank 21 through the acid delivery pipe 23. The acid storage tank 21 is at a higher position than the pretreatment tank 10, so that the acid solution in the acid storage tank 21 can automatically flow into the pretreatment tank 10 under the action of gravity. The control valve 24 is connected to the acid delivery pipe 23. The flow rate of the acid solution can be controlled by the control valve 24, thereby realizing the processes of adding acid and replenishing acid.

[0061] In a further example of this utility model, the acid addition module 20 also includes a pH probe 25 and a pH controller 26; wherein, the pH probe 25 is located inside the pretreatment tank 10 and is used to monitor the pH value of the material and feed back the pH value signal; the pH controller 26 is signal-connected to the pH probe 25 and the control valve 24, and is used to receive the pH value signal and adjust the opening of the control valve 24 based on the pH value signal and the set pH value range, so that the pH value in the pretreatment tank 10 is maintained within the set range.

[0062] In detail, when the pH value of the material in the pretreatment tank 10 exceeds the preset range, the pH probe 25 feeds back the pH signal to the pH controller 26. Based on the pH signal and the set pH range, the pH controller 26 opens the control valve 24, and acid is added to the pretreatment tank 10 under the action of gravity, causing the pH value to drop. When the pH value of the material reaches the preset range, the control valve 24 closes under the control of the pH controller 26. This ensures a stable acidolysis environment, and compared to traditional manual acid addition, this design avoids the impact of pH fluctuations on the reaction effect, while reducing acid waste. It has the advantages of precise pH control, high acid utilization rate, and high degree of automation.

[0063] In one example of this invention, the pH range of the material in the pretreatment tank 10 is set to 5.5-6.5. When the pH value exceeds 6.5, the pH probe 25 feeds back the pH signal to the pH controller 26. Based on the pH signal and the set pH range, the pH controller 26 opens the control valve 24, and the acid solution is replenished into the pretreatment tank 10 under the action of gravity, causing the pH value to drop. When the pH value of the material reaches 5.5, the control valve 24 closes under the control of the pH controller 26.

[0064] More specifically, control valve 24 can be a solenoid valve, and pH controller 26 can be an existing PLC controller (Programmable Logic Controller). The PLC controller dynamically adjusts the flow rate of acid based on the PID (Proportional-Integral-Derivative) closed-loop control algorithm, thereby maintaining the pH value of the material in pretreatment tank 10 within the preset range.

[0065] In one example of this invention, the vegetable waste acid pretreatment device further includes a heating module 40 for heating the material inside the pretreatment tank 10. This configuration ensures that the vegetable waste is within a suitable acidolysis temperature range, thereby improving acidolysis efficiency.

[0066] In some alternative examples, the heating module 40 can employ direct electric heating or steam heating. However, direct electric heating or steam heating may cause localized overheating of the material, leading to problems such as sugar caramelization or acid evaporation.

[0067] To solve the above problems, in a further example of this utility model, the heating module 40 includes a heat exchange jacket 41, a circulating hot water inlet 42, and a circulating hot water outlet 43; wherein, the heat exchange jacket 41 is nested outside the pretreatment tank 10, so that the heat exchange jacket 41 and the pretreatment tank 10 enclose each other to form a heat exchange jacket; the circulating hot water inlet 42 is connected to the heat exchange jacket 41 and is in communication with the heat exchange jacket, and is used to connect to the outlet of the hot water circulation device; the circulating hot water outlet 43 is connected to the heat exchange jacket 41 and is in communication with the heat exchange jacket, and is used to connect to the inlet of the hot water circulation device.

[0068] In detail, during the pretreatment stage of the waste material, the outlet of the hot water circulation device is connected to the circulating hot water inlet 42, and the inlet of the hot water circulation device is connected to the circulating hot water outlet 43. Under the action of the hot water circulation device, preheated hot water is injected into the heat exchange jacket and continuously circulates between the hot water circulation device and the heat exchange jacket, thereby uniformly heating the material in the pretreatment tank 10 and maintaining the acidolysis reaction within a suitable temperature range. Compared with direct electric heating or steam heating, this heating method ensures a more even heat distribution, effectively avoiding problems such as sugar caramelization or acid volatilization caused by local overheating, while also achieving higher thermal energy utilization and lower energy consumption.

[0069] More specifically, the hot water circulation device can use an existing hot water circulation electric heater.

[0070] More specifically, the circulating hot water inlet 42 and the circulating hot water outlet 43 are located on opposite sides of the pretreatment tank 10. The circulating hot water inlet 42 and the circulating hot water outlet 43 can be at the same height. Of course, in order to improve heat exchange efficiency, a bottom-in, top-out method can also be adopted, that is, the circulating hot water inlet 42 is located below the circulating hot water outlet 43. The specific design can be made according to actual needs, and no specific limitation is made in this embodiment of the utility model.

[0071] In one example of this invention, the circulating hot water temperature is set at 30-35℃.

[0072] In a further example of this utility model, the pretreatment tank 10 is provided with an exhaust port 14, which is used to connect to the waste gas collection and treatment device. With this configuration, the acid mist generated during the pretreatment process can be discharged through the exhaust port 14 and enter the waste gas collection and treatment device for treatment, thereby maintaining the gas pressure balance inside the pretreatment tank 10, while preventing the acid mist from escaping and ensuring a safe operating environment.

[0073] Specifically, the exhaust port 14 is located at the top of the pretreatment tank 10.

[0074] More specifically, there are two exhaust ports 14, which serve as backups for each other.

[0075] It is understood that, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples.

[0076] The following describes the vegetable acid pretreatment system provided by this utility model. The vegetable acid pretreatment system described below can be referred to in correspondence with the vegetable acid pretreatment device described above.

[0077] A vegetable waste acid pretreatment system includes a vegetable waste acid pretreatment device provided in any of the above examples, as well as a compressed air device, a hot water circulation device, and a waste gas collection and treatment device.

[0078] The compressed air device is connected to the bubbling pipe 30 and is used to provide a high-pressure air source for the bubbling pipe 30. Specifically, the compressed air device can be a combination of a compressor and a gas storage tank.

[0079] The hot water circulation device is connected to the waste vegetable pretreatment device.

[0080] Specifically, the outlet of the hot water circulation device is connected to the circulating hot water inlet 42, and the inlet of the hot water circulation device is connected to the circulating hot water outlet 43, which is used to provide circulating hot water to heat the material in the pretreatment tank 10.

[0081] More specifically, the hot water circulation device can use an existing hot water circulation electric heater.

[0082] The waste gas collection and treatment device is connected to the vegetable waste acid pretreatment device.

[0083] Specifically, the exhaust gas collection and treatment device is connected to the exhaust port 14 and is used to collect and treat acid mist.

[0084] More specifically, depending on the different working principles, the waste gas collection and treatment device can adopt different technical forms, such as the coupling of one or more technologies such as chemical reagent absorption, adsorbent adsorption, and condensation separation. No specific limitations are made in the embodiments of this utility model.

[0085] The vegetable waste acid pretreatment device and system provided in this embodiment of the invention, by adding dilute acid to the vegetable waste for pretreatment, can dissolve hemicellulose, destroy the internal structure of lignocellulose, and improve the porosity of the vegetable waste straw to increase the accessibility of cellulose, thereby improving the enzymatic hydrolysis efficiency in subsequent enzyme preparation. Simultaneously, during the pretreatment stage, airflow is blown into the pretreatment tank 10 using a bubble tube 30 for stirring, which makes the acid hydrolysis reaction more uniform and thorough, preventing problems such as poor pretreatment effect due to insufficient local acid concentration or material accumulation. It has the advantages of uniform acid distribution, high reaction efficiency, and thorough degradation.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A vegetable waste acid pretreatment device, characterized in that, include: The pretreatment tank (10) is equipped with a feeding port (11), a discharge port (12) and a slag discharge port (13); An acid addition module (20) is connected to the pretreatment tank (10) and is used to add acid solution into the pretreatment tank (10); A bubbling tube (30) is arranged at the bottom of the pretreatment tank (10) and has air holes for connecting to a compressed air device to blow air into the pretreatment tank (10) to stir the material.

2. The vegetable waste acid pretreatment device according to claim 1, characterized in that, The acid addition module (20) includes: An acid storage tank (21) is located outside the pretreatment tank (10) and is used to store acid solution; An acid-adding pipe (22) is connected at one end to the acid storage tank (21) via an acid delivery pipe (23), and at the other end extends into the pretreatment tank (10); A control valve (24) is connected to the acid delivery pipe (23) and is used to control the flow rate of the acid solution.

3. The vegetable waste acid pretreatment device according to claim 2, characterized in that, The acid addition module (20) also includes: A pH probe (25) is located inside the pretreatment tank (10) and is used to monitor the pH value of the material and provide a pH value signal. The pH controller (26) is connected to the pH probe (25) and the control valve (24) to receive the pH value signal and adjust the opening of the control valve (24) based on the pH value signal and the set pH value range so that the pH value in the pretreatment tank (10) is maintained within the set range.

4. The vegetable tail acid pretreatment apparatus according to any one of claims 1 to 3, characterized in that, It also includes a heating module (40) for heating the material inside the pretreatment tank (10).

5. The vegetable waste acid pretreatment device according to claim 4, characterized in that, The heating module (40) includes: A heat exchange jacket (41) is provided outside the pretreatment tank (10), so that the heat exchange jacket (41) and the pretreatment tank (10) enclose each other to form a heat exchange jacket. The circulating hot water inlet (42) is connected to the heat exchange jacket (41) and communicates with the heat exchange jacket, and is used to connect to the outlet of the hot water circulation device; The circulating hot water outlet (43) is connected to the heat exchange jacket (41) and communicates with the heat exchange layer, and is used to connect to the inlet of the hot water circulation device.

6. The vegetable tail acid pretreatment device according to claim 1, characterized in that, The slag discharge port (13) is located at the bottom of the pretreatment tank (10), and an automatic valve is provided on the slag discharge port (13).

7. The vegetable waste acid pretreatment device according to claim 1, characterized in that, The pretreatment tank (10) is provided with an exhaust port (14), which is used to connect to the waste gas collection and treatment device.

8. The vegetable waste acid pretreatment device according to claim 7, characterized in that, There are two exhaust ports (14), and the two exhaust ports (14) are backups for each other.

9. A vegetable waste acid pretreatment system, characterized in that, Includes the vegetable tail acid pretreatment device as described in any one of claims 1-8; It also includes a compressed air device, which is connected to the bubbling tube (30).

10. The vegetable tail acid pretreatment system according to claim 9, characterized in that, It also includes hot water circulation devices and / or waste gas collection and treatment devices; The hot water circulation device is connected to the vegetable acid pretreatment device; The waste gas collection and treatment device is connected to the vegetable acid pretreatment device.

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