A reaction apparatus for preparing humic acid and a treatment system including the same

Abstract

The utility model provides a kind of reaction device for preparing humic acid, comprising: vertically arranged kettle body, the kettle body includes the feed inlet formed in top, dosing port and exhaust port, and the discharge outlet formed in bottom;Stirring assembly is used to mix the organic waste and the liquid medicament and makes it flow state;Temperature regulating assembly is arranged on the circumferential wall of the kettle body, it includes first jacket and second jacket arranged up and down;Pretreatment assembly is arranged in the feed inlet, the pretreatment assembly includes shell and at least a pair of roller, the shell includes the pretreatment inlet formed in upper portion, water injection port formed on sidewall, and pretreatment outlet formed in lower portion and matched with the feed inlet.The reaction device can dynamically stir material, accurately control temperature in partition and realize waste heat self-use, to improve reaction uniformity, reduce humic acid decomposition rate and energy consumption.The utility model also provides a kind of processing system for preparing humic acid.

Description

Technical Field

[0001] This utility model relates to the field of humic acid preparation technology, specifically to a reaction apparatus for preparing humic acid and a processing system including the apparatus. Background Technology

[0002] In the traditional humic acid preparation process, organic waste such as straw, rice husks, corn cobs, sugarcane bagasse, and various vegetable residues are mixed with alkali and water in a reaction vessel. Humic acid is generated through an alkaline-thermal reaction, which also produces high-temperature, high-pressure steam. However, traditional humic acid reaction vessels have several drawbacks: First, the stirring effect is poor. Most reaction vessels use static baffles, resulting in a material accumulation rate greater than 20%, leading to low reaction efficiency. Second, temperature control is not precise enough. Single-zone heating easily causes local overheating, resulting in a humic acid decomposition rate exceeding 15%. Third, energy consumption is too high. Direct steam discharge results in wasted heat energy, with heat losses reaching 30% or more. In addition, in terms of exhaust gas treatment, heat energy waste is severe, with direct discharge of high-temperature steam leading to a thermal efficiency of less than 40%. Water consumption is also high, as condensate is not recycled and requires additional deionized water, consuming at least 0.5 tons of water per hour, increasing production costs. Meanwhile, the untreated exhaust gas contains volatile organic compounds (VOCs), which do not meet the GB16297-1996 emission standards, posing a problem of air pollution. Therefore, how to develop a humic acid preparation reactor with dynamic vortex stirring and segmented temperature control functions is an urgent problem to be solved. Utility Model Content

[0003] To address the problems existing in the prior art, the first objective of this utility model is to provide a reaction device for preparing humic acid. This device can dynamically stir materials and precisely control the temperature in different zones to improve reaction uniformity, reduce the decomposition rate of humic acid and energy consumption, and is suitable for the efficient resource utilization of agricultural and forestry waste.

[0004] The second objective of this invention is to provide a treatment system for preparing humic acid that not only recovers steam condensate, reducing water waste and consumption, but also generates electricity using pressure differentials, improving energy efficiency, while simultaneously purifying exhaust gases to ensure emissions meet environmental standards. This system is suitable for energy recovery and environmental compliance in organic waste treatment equipment, truly achieving combined water-heat-power generation and exhaust gas purification.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A reaction apparatus for preparing humic acid, the apparatus comprising: a vertically arranged vessel, the vessel including an inlet for receiving organic waste, an inlet for receiving liquid reagent, and an exhaust port for discharging high-temperature steam formed at the top, and an outlet for discharging humic acid formed at the bottom; a stirring assembly arranged vertically along the vessel for mixing the organic waste and the liquid reagent and fluidizing them; a temperature control assembly disposed on the circumferential wall of the vessel, the temperature control assembly including a first jacket and a second jacket arranged vertically, the interior of the first jacket and the second jacket each having a space for loading a medium; and a pretreatment assembly disposed at the inlet, the pretreatment assembly including a shell and at least a pair of rollers, the shell including a pretreatment inlet formed at the upper part, a water inlet formed on the side wall, and a pretreatment outlet formed at the lower part and connected to the inlet.

[0007] Furthermore, the stirring assembly includes a rotating shaft and a plurality of helical blades. One end of the rotating shaft is rotatably located in a shaft hole formed at the top of the vessel body, and the other end of the rotating shaft extends toward the bottom of the vessel body. The helical blades are arranged at certain intervals along the axial direction of the rotating shaft.

[0008] Furthermore, a flow guide tube is also provided inside the vessel and located outside the stirring assembly. The flow guide tube includes a cylinder body, one end of which is fixed to the top of the vessel body, and the other end of which extends towards the bottom of the vessel body. A communication port is formed on the upper side wall of the cylinder body.

[0009] Furthermore, the pitch of the helical blade is 100-150mm, and the thickness of the helical blade is 3-8mm.

[0010] Furthermore, the medium temperature of the first jacket is greater than the medium temperature of the second jacket.

[0011] Furthermore, the bottom of the vessel is also provided with support legs, which will lift the vessel off the ground at a certain distance.

[0012] A processing system for preparing humic acid, the processing system comprising: a reaction apparatus according to the above; a heat recovery device connected to the reaction apparatus for recovering heat from the high-temperature steam and forming condensate; and a water circulation device connected to the heat recovery device for storing the condensate and circulating it back to the reaction apparatus.

[0013] Furthermore, the heat recovery device includes a housing and a heat exchange assembly disposed inside the housing. The side wall of the housing has a gas inlet for receiving high-temperature steam and a gas outlet for discharging cooling gas, and a liquid collection port formed at the bottom of the housing for discharging condensate. The heat exchange assembly includes a heat exchange coil for receiving the high-temperature steam and a spiral coil wound on the outer wall of the heat exchange coil. The spiral coil contains a cooling medium.

[0014] Furthermore, the water circulation device includes a tank, which includes a liquid outlet and an overflow outlet formed on the side wall, and a liquid inlet formed on the upper part and connected to the liquid collection port.

[0015] Furthermore, the processing system also includes an activated carbon adsorption tank for purifying the gas, the activated carbon adsorption tank being connected to the heat recovery device.

[0016] This utility model has the following advantages:

[0017] 1. This invention relates to a reaction apparatus for preparing humic acid. Its stirring assembly utilizes a rotating shaft and spiral blades for dynamic stirring. A guide tube guides the material in a fluidized circulation within the reactor, preventing material accumulation and keeping the accumulation rate low, thus improving reaction uniformity and efficiency. The spiral blades limit the pitch and thickness, further optimizing the stirring effect. For temperature control, the temperature regulating assembly employs a double-jacket design arranged vertically to achieve precise zoned temperature control, preventing localized overheating and effectively reducing the humic acid decomposition rate. The pretreatment assembly pre-treats the organic waste, making it easier to mix with liquid reagents and improving the initial reaction efficiency.

[0018] 2. This utility model's treatment system for preparing humic acid utilizes a heat recovery device that recovers heat from high-temperature steam and forms condensate, effectively reducing heat loss, improving energy utilization, and reducing energy consumption. A water circulation device recirculates the condensate to the reaction apparatus, significantly reducing water consumption and saving water resources and production costs. An activated carbon adsorption tank purifies the exhaust gas, removing volatile organic compounds and ensuring emissions meet relevant environmental standards, thus solving the problem of waste gas pollution. Furthermore, a differential pressure power generation unit is installed between the heat recovery device and the activated carbon adsorption tank, utilizing the pressure difference to convert the steam's energy into electrical energy. The entire treatment system achieves combined water-heat-power generation and exhaust gas purification, bringing significant economic and environmental benefits to organic waste treatment. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the reaction apparatus for preparing humic acid according to this utility model.

[0020] Figure 2 This is a three-dimensional cross-sectional view of the reaction apparatus for preparing humic acid according to this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the pretreatment component of this utility model.

[0022] Figure 4 This is a three-dimensional structural schematic diagram of the processing system for preparing humic acid according to this utility model.

[0023] Figure 5 This is a three-dimensional structural diagram of the heat recovery device of this utility model.

[0024] Wherein, 1 is the reaction device, 101 is the vessel body, 101a is the feed inlet, 101b is the chemical dosing inlet, 101c is the exhaust port, 101d is the discharge port, 101e is the shaft hole, 102 is the stirring assembly, 102a is the rotating shaft, 102b is the spiral blade, 102c is the motor, 103 is the temperature control assembly, 103a is the first jacket, 103a1 is the first medium inlet, 103a2 is the first medium outlet, 103b is the second jacket, 103b1 is the second medium inlet, 103b2 is the second medium outlet, 104 is the pretreatment assembly, 10 4a is the shell, 104a1 is the pretreatment inlet, 104a2 is the water inlet, 104a3 is the pretreatment outlet, 104b is the roller, 105 is the guide tube, 105a is the connecting port, 106 is the support leg, 2 is the heat recovery device, 201 is the box body, 201a is the gas inlet, 201b is the gas outlet, 201c is the liquid collection port, 202 is the heat exchange assembly, 202a is the heat exchange coil, 202b is the spiral coil, 3 is the water circulation device, 301 is the tank body, 301a is the liquid inlet, 301b is the liquid outlet, and 301c is the overflow port. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Reference Figure 1This document illustrates an embodiment of a reaction apparatus 1 for preparing humic acid. The apparatus mainly comprises a vessel body 101, a stirring assembly 102, a temperature control assembly 103, and a pretreatment assembly 104. This apparatus enables dynamic stirring of materials and precise zoned temperature control, thereby improving reaction uniformity, reducing the humic acid decomposition rate, and decreasing energy consumption. The vessel body 101 is vertically arranged and has an internal reaction space for loading materials. The top of the vessel body 101 has an inlet 101a for receiving organic waste, such as straw, rice husks, corn cobs, sugarcane bagasse, and various vegetable residues. The top of the vessel body 101 also has an inlet 101b for receiving liquid reagents and an outlet 101c for discharging high-temperature, high-pressure steam, such as sodium hydroxide, potassium hydroxide, or ammonia. At the bottom of the vessel body 101 is an outlet 101d for discharging humic acid, and a butterfly valve is installed on the pipeline of the outlet 101d. Organic waste and liquid reagents enter the internal space of the reactor 101 through the feed inlet 101a and the dosing inlet 101b, respectively. They mix and react under heat. The humic acid produced by the reaction is discharged from the discharge outlet 101d, and the high-temperature and high-pressure steam is discharged to the outside through the exhaust outlet 101c. Alternatively, the liquid reagents can be added into the reactor 101 together with the organic waste through the feed inlet 101a.

[0027] As shown in the figure, the vessel body 101 has a cylindrical cavity structure. A detachable cover is installed on the top of the cylindrical cavity, facilitating the opening of the cover for inspection and maintenance of the internal components. The bottom of the cylindrical cavity has an arc-shaped section, with the discharge port 101d located at the bottom of this arc-shaped section. This facilitates the collection of humic acid at the discharge port 101d, ensuring its smooth discharge. The vessel body 101 is made of 316L stainless steel, with an inner diameter of 800mm and an effective volume of 1.2m³.

[0028] Continue to refer to Figure 1 The bottom of the vessel body 101 is also provided with support legs 106, which will raise the vessel body 101 a certain distance off the ground. The support legs 106 include four support rods, which are respectively arranged at the four corners of the bottom of the vessel body 101, so that the discharge port 101d has a certain space with the ground, so as to connect the pipeline to discharge humic acid.

[0029] Reference Figure 1 and Figure 2The stirring assembly 102 is arranged vertically along the vessel body 101 and located on the central axis of the vessel body 101. It is used to enhance the mixing and fluidization of organic waste and liquid agents. The stirring assembly 102 includes a rotating shaft 102a and multiple helical blades 102b. One end of the rotating shaft 102a is rotatably located in a shaft hole 101e formed in the top of the vessel body 101, and the other end of the rotating shaft 102a extends towards the bottom of the vessel body 101. The helical blades 102b are arranged at certain intervals along the axial direction of the rotating shaft 102a. A motor 102c is located at one end of the rotating shaft 102a. The motor 102c is located at the top of the vessel body 101 and is fixed with a support (not shown in the figure). A coupling is also provided between the rotating shaft 102a and the motor 102c. The coupling can be a magnetic coupling. The motor 102c has a power of 0.75kW, an adjustable speed of 0-10r / min, and an air gap ≤1mm. Motor 102c drives rotating shaft 102a, which in turn rotates helical blades 102b, achieving dynamic stirring of materials, preventing material accumulation, and improving reaction uniformity. Simultaneously, multiple helical blades 102b are configured with the same rotation direction to generate downward pressure, causing the material to flow back and forth within the reactor body 101 for fluidized reaction. The helical blades 102b have a pitch of 100-150mm and a thickness of 3-8mm, with a preferred pitch of 120mm and a thickness of 5mm. They are made of 316L stainless steel with a hard chrome plating (HRC≥55) to ensure corrosion resistance and wear resistance in harsh reaction environments and extend their service life. Through the improved reaction uniformity of the stirring assembly 102, the material accumulation rate is reduced to less than 5%, and the humic acid yield is increased to 18%-22%.

[0030] Continue to refer to Figure 2The vessel body 101 also includes a guide tube 105 located outside the stirring assembly 102. The guide tube 105 consists of a cylindrical body with an open bottom. One end of the cylindrical body is fixed to the top of the vessel body 101 to ensure the stability of the guide tube 105 within the vessel body 101. The feed inlet 101a and the dosing inlet 101b both correspond to the inside of the cylindrical body, allowing materials to directly enter the guide tube 105. The other end of the cylindrical body extends towards the bottom of the vessel body 101, and its length is greater than or equal to the length of the rotating shaft 102a to ensure sufficient guidance of material flow. A connecting port 105a is formed on the upper side wall of the cylindrical body. When humic acid needs to be prepared, organic waste and liquid reagents enter the guide tube 105 through the feed port 101a and the dosing port 101b. The rotating shaft 102a drives the spiral blades 102b to rotate, thoroughly mixing the organic waste and liquid reagents and creating downward pressure, pushing the mixture downwards inside the guide tube 105. When the mixture reaches the open bottom of the guide tube 105, it is diverted to the space outside the guide tube 105 and continues to flow upwards through the channel formed between the guide tube 105 and the vessel body 101. Finally, the material is recirculated back into the guide tube 105 through the connecting port 105a at the top of the guide tube 105, thus forming a circulating flow of material. Through this circulating flow, the potential dead zones in the stirring within the vessel body 101 are effectively eliminated, and the material can be more thoroughly mixed during continuous circulation, further improving the stirring effect. Moreover, thorough mixing of materials makes the reaction more uniform, allowing reactants in different regions to come into contact and react more frequently, thereby improving reaction uniformity and creating favorable conditions for the preparation of humic acid.

[0031] Continue to refer to Figure 1 and Figure 2The temperature control component 103 is disposed on the circumferential wall of the vessel body 101. The temperature control component 103 includes a first jacket 103a and a second jacket 103b arranged vertically. The first jacket 103a and the second jacket 103b basically cover the circumferential wall of the vessel body 101. For example, the first jacket 103a occupies 2 / 3 of the circumferential wall of the vessel body 101, and the second jacket 103b occupies 1 / 3 of the circumferential wall of the vessel body 101. As shown in the figure, a first medium inlet 103a1 and a first medium outlet 103a2 are formed on the outer wall of the first jacket 103a, and a second medium inlet 103b1 and a second medium outlet 103b2 are formed on the outer wall of the second jacket 103b. The interior of the first jacket 103a and the second jacket 103b both form a space for loading the medium to regulate the temperature of the material at different height positions of the vessel body 101. The medium can be cooling water, hot water, hot oil, refrigerant, etc. In addition, the first jacket 103a can also be a resistance heating layer, with resistance wire as the first medium, specifically an aluminum silicate fiber heating jacket, with a power of 3kW and a temperature controlled in the range of 170-210℃, preferably 180℃. The second jacket 103b is a water-cooled jacket, with circulating water as the second medium, and its temperature control range is 110-130℃, preferably 120℃, with a temperature accuracy controllable within ±2℃. The medium temperature of the first jacket 103a is higher than that of the second jacket 103b, so that when the material in the upper layer flows to the lower layer after heating, the temperature is appropriately reduced, avoiding excessively high material temperatures that could cause the decomposition of humic acid.

[0032] The temperature control component 103 is also equipped with a temperature controller. Specifically, a PLC (model 105, Siemens S7-1200) is connected to a type K thermocouple, which can monitor the temperature at different locations within the vessel body 101 in real time and precisely adjust the temperature difference between the upper and lower sections. Through this zoned setting, the temperature control component 103 can achieve precise temperature control of different height areas within the vessel body 101, effectively avoiding local overheating and thus reducing the decomposition rate of humic acid to <8%.

[0033] Reference Figure 1 and Figure 3 The pretreatment component 104 is disposed on the feed inlet 101a. Its main function is to crush organic waste and premix the crushed material with water before allowing the mixture to enter the reactor body 101 through the feed inlet 101a. The pretreatment component 104 includes a shell 104a and at least one pair of rollers 104b. The shell 104a includes a pretreatment inlet 104a1 formed in the upper part, a water inlet 104a2 formed on the side wall and located below the rollers 104b, and a pretreatment outlet 104a3 formed in the lower part and connected to the feed inlet 101a. One end of each roller 104b is connected to a rotating motor, which drives the pair of rollers 104b to perform roller compression, thereby crushing the organic waste.

[0034] In this embodiment, a pair of rollers 104b are horizontally arranged inside the shell 104a. When organic waste enters the shell 104a from the pretreatment inlet 104a1, it first passes through the pair of rollers 104b. Driven by a rotating motor, the rollers 104b crush the organic waste, turning large pieces of organic waste into smaller pieces. At the same time, circulating water is injected through the water inlet 104a2. The small pieces of organic waste and the circulating water are premixed inside the shell 104a. The premixed material finally enters the reactor 101 through the pretreatment outlet 104a3 and the feed inlet 101a to improve the efficiency of subsequent reactions.

[0035] Reference Figure 4 The diagram shows the structure of a processing system including the aforementioned reaction device 1. The system mainly includes the reaction device 1, a heat recovery device 2, and a water circulation device 3. The heat recovery device 2 is connected to the reaction device 1 and is used to recover the heat from the high-temperature steam and form condensate. The water circulation device 3 is connected to the heat recovery device 2 and is used to store the condensate and circulate it back to the reaction device 1. Both the heat recovery device 2 and the water circulation device 3 have mounting bases to fix their relative positions, which are not shown in the diagram.

[0036] Reference Figure 5 The heat recovery device 2 includes a housing 201 and a heat exchange assembly 202 disposed inside the housing 201. The side wall of the housing 201 has a gas inlet 201a for receiving high-temperature steam and a gas outlet 201b for discharging cooling gas, and a collection port 201c at the bottom of the housing 201 for discharging condensate. The heat exchange assembly 202 includes a heat exchange coil 202a for receiving high-temperature steam and a spiral coil 202b surrounding the outer wall of the heat exchange coil 202a. The spiral coil 202b is made of copper spiral tube (Φ50×3mm) with a slope of 5°±0.5° and is filled with a cooling medium. The housing 201 has a top plate and a bottom plate, and four side plates disposed between the top plate and the bottom plate, which together enclose the heat recovery space. The heat exchange coil 202a comprises multiple heat exchange tubes arranged at certain intervals along the vertical direction of the housing 201, and multiple U-shaped connectors (not shown in the figure) at the ends of the heat exchange tubes. The U-shaped connectors connect the multiple heat exchange tubes in series to form the heat exchange coil 202a. One end of the heat exchange coil 202a is connected to the gas inlet 201a, and the other end is connected to the gas outlet 201b. The spiral coil 202b is wrapped around the outer wall of the heat exchange tubes, allowing the cooling medium inside the spiral coil 202b to exchange heat with the high-temperature and high-pressure steam inside the heat exchange tubes. During the heat exchange process, the cooling medium recovers heat, and condensate forms on the outer wall of the heat exchange tubes. The condensate falls to the bottom of the housing 201 under gravity and collects at the liquid collection port 201c before being discharged.

[0037] Continue to refer to Figure 4 The water circulation device 3 includes a tank 301, which includes a liquid outlet 301b and an overflow port 301c formed on the side wall, and a liquid inlet 301a formed on the upper part and connected to the liquid collection port 201c. The liquid outlet 301b is connected to a pump body to pump the circulating water to the water inlet 104a2 of the reaction device 1. Specifically, the water collection tank has a volume of 50L, is made of 304 stainless steel, and is equipped with a float level gauge. The pump body is a corrosion-resistant pump made of PPR, with a flow rate of up to 1m³ / h and a head of 10m.

[0038] In an embodiment not shown, the treatment system further includes an activated carbon adsorption tank for purifying the gas. The activated carbon adsorption tank is connected to the heat recovery device 2. The tank is filled with columnar activated carbon with a particle size of 4±0.2mm and an iodine value ≥1000mg / g. The adsorption tank has a processing air volume of 50m³ / h and is equipped with a differential pressure monitor with a range of 0-10kPa. Once the differential pressure exceeds the limit, an alarm will be issued to remind the activated carbon to be replaced. The purified gas discharged after treatment by the activated carbon adsorption tank has a VOCs concentration of <50mg / m³.

[0039] In an embodiment not shown, the processing system further includes a differential pressure power generation unit located between the heat recovery device 2 and the activated carbon adsorption tank. This unit utilizes the pressure difference to convert the energy of the steam into electrical energy, with the output connected to a lithium battery pack (205, 12V / 20Ah). For example, the differential pressure power generation unit includes a micro turbine and a permanent magnet generator, wherein the impeller diameter is 100mm and the generator output is 12V DC to achieve pressure difference energy recovery.

[0040] The aforementioned treatment system recovers heat from steam and generates condensate through heat recovery device 2. The condensate is collected and circulated to the reaction device through water circulation device 3, reducing water waste and consumption. It also utilizes the steam pressure difference to generate electricity through a differential pressure power generation unit, improving energy efficiency. Simultaneously, activated carbon adsorption tanks purify exhaust gas, ensuring emissions meet environmental standards. This system is suitable for energy recovery and environmental compliance in organic waste treatment equipment, truly achieving combined water-heat-power generation and exhaust gas purification.

[0041] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention. The embodiments described in this disclosure are intended as non-limiting examples, and other embodiments may take various and alternative forms. Furthermore, the drawings are not necessarily to scale and may present simplified expressions of various features of the present disclosure, including, for example, specific dimensions, orientations, positions, and shapes. Details associated with such features will be determined in part by the intended application and usage environment of the described embodiments.

[0042] The detailed description and accompanying drawings are supporting and descriptive of this teaching, but the scope of this teaching is defined only by the claims. While the best mode and some other embodiments for carrying out this teaching have been described in detail, various alternative designs and embodiments exist for practicing the teaching as defined in the appended claims. Furthermore, this disclosure expressly includes combinations and sub-combinations of the elements and features set forth above and below.

Claims

1. A reaction apparatus for preparing humic acid, characterized in that, The reaction apparatus includes: The vertically arranged vessel includes an inlet formed at the top for receiving organic waste, a dosing port for receiving liquid reagents, and an exhaust port for discharging high-temperature steam, and an outlet formed at the bottom for discharging humic acid. A stirring assembly arranged vertically along the vessel body is used to mix the organic waste and the liquid agent and fluidize them; The temperature control component is disposed on the circumferential wall of the vessel body. The temperature control component includes a first jacket and a second jacket arranged vertically. The interior of the first jacket and the second jacket is formed with a space for loading the medium. A pretreatment assembly disposed at the feed inlet includes a housing and at least a pair of rollers. The housing includes a pretreatment inlet formed in the upper part, a water inlet formed in the side wall, and a pretreatment outlet formed in the lower part that mates with the feed inlet.

2. The reaction apparatus for preparing humic acid according to claim 1, characterized in that, The stirring assembly includes a rotating shaft and multiple helical blades. One end of the rotating shaft is rotatably located in a shaft hole formed at the top of the vessel body, and the other end of the rotating shaft extends toward the bottom of the vessel body. The helical blades are arranged at certain intervals along the axial direction of the rotating shaft.

3. The reaction apparatus for preparing humic acid according to claim 2, characterized in that, The vessel body is also provided with a flow guide tube, which is located outside the stirring assembly. The flow guide tube includes a cylinder body, one end of which is fixed to the top of the vessel body, and the other end of which extends to the bottom of the vessel body. A communication port is formed on the upper side wall of the cylinder body.

4. The reaction apparatus for preparing humic acid according to claim 2, characterized in that, The pitch of the helical blade is 100-150mm, and the thickness of the helical blade is 3-8mm.

5. The reaction apparatus for preparing humic acid according to claim 1, characterized in that, The medium temperature in the first jacket is greater than the medium temperature in the second jacket.

6. The reaction apparatus for preparing humic acid according to claim 1, characterized in that, The bottom of the vessel is also provided with support legs, which will lift the vessel off the ground at a certain distance.

7. A processing system for preparing humic acid, characterized in that, The processing system includes: The reaction apparatus according to any one of claims 1 to 6; A heat recovery device, which is connected to the reaction device, is used to recover the heat of the high-temperature steam and form condensate; A water circulation device, which is connected to the heat recovery device, is used to store the condensate and circulate it to the reaction device.

8. The processing system according to claim 7, characterized in that, The heat recovery device includes a housing and a heat exchange assembly disposed inside the housing. The side wall of the housing has a gas inlet for receiving high-temperature steam and a gas outlet for discharging cooling gas, and a liquid collection port formed at the bottom of the housing for discharging condensate. The heat exchange assembly includes a heat exchange coil for receiving the high-temperature steam and a spiral coil wound on the outer wall of the heat exchange coil. The spiral coil contains a cooling medium.

9. The processing system according to claim 8, characterized in that, The water circulation device includes a tank, which includes a liquid outlet and an overflow outlet formed on the side wall, and a liquid inlet formed on the upper part and connected to the liquid collection port.

10. The processing system according to claim 7, characterized in that, The processing system also includes an activated carbon adsorption tank for purifying the gas, which is connected to the heat recovery device.

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