Intelligent dredged sludge treatment method

Abstract

The invention discloses an intelligent treatment method for dredged sludge. The intelligent treatment method comprises the following steps: S1, preparing fermentation raw materials; s2, performing fermentation treatment on the fermentation raw material to obtain a first fermentation material and first fermentation gas; performing vacuum treatment on the first fermentation material to obtain a second fermentation material and second fermentation gas; collecting the first fermentation gas and the second fermentation gas, performing desulfurization and combustion treatment on the first fermentation gas and the second fermentation gas to obtain high-temperature steam, and mixing the high-temperature steam with the second fermentation material to obtain a mixed material; s3, repeating the step S2, and circularly treating the mixed material until the fermentation raw material is completely fermented; s4, performing dehydration treatment on the completely fermented fermentation raw materials to obtain treated dredged sludge and tail water; wherein the fermentation liquor in the fermentation raw materials in the first round is tap water, and the fermentation liquor in the fermentation raw materials except the fermentation raw materials in the first round is tail water. When the device is used for treating dredged sludge, secondary pollution is avoided, and the fermentation efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and more specifically, to an intelligent treatment method for dredged sludge. Background Art

[0002] With the rapid development of my country's economic construction and the continuous advancement of the country's urbanization, the scale of cities in my country is getting larger and larger. However, at the same time, due to the continuous growth of my country's population and the increasingly concentrated population density, the amount of organic domestic waste in cities is increasing. A large amount of organic waste generated in people's daily lives is discharged into rivers and lakes at will, causing siltation and bringing adverse effects to the environment. In order to improve the water quality of lakes and rivers and ensure the smooth flow of river channels and normal flood discharge capacity, large-scale water environment management projects such as river and lake dredging, water system communication, and bioremediation have been carried out, resulting in a large amount of dredged sludge. If it is not effectively treated, it will inevitably bring huge challenges to the ecological environment and people's health. How to reduce, harmlessly, and resource-based sludge treatment has become an increasingly important environmental issue.

[0003] Dredged sludge is mainly treated by on-site burial and stacking, however, this type of treatment causes great waste of scarce land resources, and the heavy metal ions and other toxic substances contained in the dredged sludge will cause secondary pollution to the environment. According to the defects of the above-mentioned existing dredged sludge treatment technology, those skilled in the art have proposed many new treatment and utilization methods in the long-term research process. For example, the invention patent with the authorization publication number CN 113264649 B discloses a method for treating river sludge, which performs solid waste leaching toxicity identification detection on the sludge, adds pig manure and edible fungus bag waste for mixed fermentation, and finally turns over and dehydrates to obtain the treated sludge. This method solves the technical problem that the traditional method cannot completely remove harmful heavy metals and microorganisms in the sludge and is not conducive to the subsequent secondary utilization of resources.

[0004] However, the above-mentioned prior art still has the following technical problems: 1) The dredged sludge has a high moisture content, and the efficiency of direct treatment in the workshop is low. After the sludge is evenly mixed with pig manure and edible fungus bag waste, static fermentation is adopted. The fermentation state at normal temperature and pressure prolongs the fermentation time and reduces the timeliness of sludge treatment; 2) After the sludge enters the workshop, it will be chelated and solidified. The use of heavy metal solidifying agents not only easily introduces impurities and causes secondary pollution, but also increases the cost of using solidifying agents, which is not conducive to controlling the treatment cost of sludge. Summary of the invention

[0005] Another object of the present invention is to provide an intelligent treatment method for dredged sludge which does not cause secondary pollution and has high fermentation efficiency.

[0006] In order to achieve these purposes and other advantages according to the present invention, a method for intelligent treatment of dredged sludge is provided, comprising the following steps: S1, preparing fermentation raw materials, wherein the fermentation raw materials are composed of dehydrated water cake, supplementary carbon source and fermentation liquid; the dehydrated water cake is formed by dehydrating dredged sludge, and the supplementary carbon source is agricultural and forestry waste; S2, fermenting the fermentation raw material to obtain a first fermentation material and a first fermentation gas; vacuum-treating the first fermentation material to obtain a second fermentation material and a second fermentation gas; collecting the first fermentation gas and the second fermentation gas, desulfurizing and burning the first fermentation gas and the second fermentation gas to obtain high-temperature steam, and mixing the high-temperature steam with the second fermentation material to obtain a mixed material; S3, repeat step S2, and circulate the mixed material until the fermentation raw material is completely fermented; S4, using a filter press dehydrator to dehydrate the fermented raw materials that have been completely fermented to obtain treated dredged sludge and tail water; The fermentation liquid in the first round of fermentation raw materials is tap water, and the fermentation liquid in the fermentation raw materials other than the first round is tail water.

[0007] Preferably, in S1, a sludge pretreatment unit is used to configure the fermentation material, and the sludge pretreatment unit includes a sludge storage tank and a dewatering device that are interconnected, an agitator that is connected to the dewatering device and a crusher, and a tail water pipe that is connected to the agitator and the filter press dewatering machine; the sludge storage tank is used to store dredged sludge, and the crusher is used to store a supplementary carbon source. The dredged sludge is pumped into the dewatering device by a slurry pump arranged in the sludge storage tank, and is dehydrated by the dewatering device to form a dehydrated sludge cake; the dehydrated sludge cake, the supplementary carbon source and the tail water are transported to the agitator through a first conveying pipe, a second conveying pipe and a tail water pipe, respectively, and stirred to obtain the fermentation raw material.

[0008] Preferably, the sludge pretreatment unit further comprises a gravity sensing device arranged in the agitator for monitoring the weight of the material, and a concentration sensing probe for measuring the fermentation concentration x in the agitator, and the sludge pretreatment unit is controlled by a control system; in S1, the fermentation raw material is configured by the following method: A. Design the range of fermentation raw material fermentation concentration p. Based on the designed range of fermentation concentration p, design the range of weight ratio x of dehydrated water cake to supplementary carbon source, wherein: p∈[p1,p2]; x = m / (nm); Wherein, x∈[x1, x2]; m is the weight of dehydrated water cake; n is the total weight of supplementary carbon source and dehydrated water cake, (nm) is the weight of supplementary carbon source; B. The weight m of the added dewatered mud cake and the calculation formula of the weight ratio x are set in the control system; the control system controls the mud pump to transport the dredged mud to the dewatering device for dehydration to form dewatered mud cake, and then controls the dewatering device to transport the dewatered mud cake to the agitator. When the weight data monitored by the gravity sensing device acquired by the control system is m, the dewatering device is controlled to stop transporting; then the crusher is controlled to transport the supplementary carbon source to the agitator. The control system calculates the weight ratio x in real time based on the data transmitted by the gravity sensing device. When the calculated value of the weight ratio x is within the range of [x1, x2], the crusher is controlled to stop transporting the supplementary carbon source; C. The control system controls the tail water pipeline to transport the fermentation liquid into the agitator. When the fermentation concentration p detected by the concentration sensing probe obtained by the control system is within the range of [p1, p2], the tail water pipeline is controlled to stop transporting the fermentation liquid. At this point, the preparation of the fermentation raw materials is completed.

[0009] Preferably, in S2, the fermentation raw material is fermented by a sludge fermentation unit, and the sludge fermentation unit includes a fermentation device connected to the agitator, and a gas storage tank connected to the fermentation device, and the gas storage tank is used to store the first fermentation gas and the second fermentation gas.

[0010] Preferably, in S2, the first fermented material is vacuum-treated by a vacuum treatment unit, wherein the vacuum treatment unit comprises a vacuum treatment device connected to the fermentation device, and a vacuum pump connected to the vacuum treatment device, wherein the vacuum pump is connected to a gas storage tank.

[0011] Preferably, in S2, the first fermentation gas and the second fermentation gas are desulfurized and burned by a gas processing unit, and the gas processing unit includes a desulfurization reactor, a gas furnace, and a gas-liquid mixer that are interconnected, the desulfurization reactor is also connected to the gas storage tank, and the gas-liquid mixer is also connected to the vacuum processing device and the fermentation device; the vacuum processing device is also connected to the filter press dehydrator.

[0012] Preferably, the sludge fermentation unit also includes a temperature sensing device and a gas sensing device for monitoring temperature data and gas concentration data in the fermentation device respectively, and the temperature sensing device and the gas sensing device are both electrically connected to the control system; in S3, when the temperature data monitored by the temperature sensing device acquired by the control system reaches 20-25°C, and the gas sensing device does not detect gas concentration data, the fermentation raw material is completely fermented.

[0013] Preferably, the vacuum processing device is provided with a vacuum gauge for monitoring pressure data in the vacuum processing device, and the vacuum processing device is electrically connected to the control system.

[0014] The present invention at least includes the following beneficial effects: the present invention realizes intelligent configuration of fermentation raw materials through a control system and a sludge pretreatment unit to ensure that the fermentation raw materials have an optimal moisture content, which can improve the subsequent fermentation effect; in the fermentation process, the fermentation gas generated by the fermentation is collected by a gas storage tank, and the gas is desulfurized and burned to form high-temperature steam, which is then refluxed into the fermentation device, and the high-temperature steam is used to realize high-temperature digestion of the fermentation raw materials, and the heavy metals in the dredged sludge are passivated by high-temperature digestion, so that the purpose of removing the heavy metals in the dredged sludge without using a curing agent can be achieved, and secondary pollution will not be caused. At the same time, the high-temperature steam can improve the fermentation efficiency, reduce the viscosity of the material, and improve the fermentation effect; the first fermentation material is vacuumed by a vacuum pump, and the residual ammonia in the first fermentation material can be separated, the inhibitory effect of ammonia on fermentation can be reduced, and the efficiency of material fermentation can be improved; the material after complete fermentation is separated by dehydration, and the tail water is refluxed as a fermentation liquid for fermentation, and the fermentation bacteria therein are fully utilized, which can further improve the fermentation efficiency, and the sludge can be prepared into high-quality biomass fertilizer after treatment, realizing the resource utilization of dredged sludge.

[0015] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the arrangement structure of a sludge pretreatment unit, a sludge fermentation unit, a vacuum treatment unit, and a gas treatment unit according to an embodiment of the present invention; Description of the Figures in the Specification: 1-sludge storage tank, 2-mud pump, 3-dehydration device, 4-first conveying pipeline, 5-crusher, 6-second conveying pipeline, 7-concentration sensing probe, 8-gravity sensing device, 9-tail water pipeline, 10-sludge storage truck, 11-gas-liquid mixer, 12-desulfurization reactor, 13-gas furnace, 14-vacuum treatment device, 15-vacuum gauge, 16-vacuum pump, 17-gas sensing device, 18-temperature sensing device, 19-agitator, 20-filter press dehydrator, 21-control system, 22-fermentation device, 23-gas storage tank. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] Embodiment 1 like Figure 1 As shown, the present invention provides a method for intelligently processing dredged sludge, comprising the following steps: Step 1: preparing fermentation raw materials, wherein the fermentation raw materials are composed of dehydrated water cake, supplementary carbon source and fermentation liquid; the dehydrated water cake is formed by dehydrating dredged sludge, and the supplementary carbon source is agricultural and forestry waste; The fermentation material is obtained by using a sludge pretreatment unit, which is controlled by a control system 21. The sludge pretreatment unit includes a sludge storage tank 1 and a dehydration device 3 that are interconnected, an agitator 19 that is respectively connected to the dehydration device 3 and the crusher 5 through a first conveying pipeline 4 and a second conveying pipeline 6, and a tailwater pipeline 9 that is connected to the agitator 19 and the filter press dehydrator 20; the sludge storage tank 1 is used to store dredged sludge, the crusher 5 is used to store a supplementary carbon source, a slurry pump 2 is provided in the sludge storage hopper, and a gravity sensing device 8 for monitoring the weight of the material and a concentration sensing probe 7 for measuring the fermentation concentration x in the agitator 19 are provided in the agitator 19; The fermentation raw materials are prepared by the following method: A. Design the range of fermentation raw material fermentation concentration p. Based on the designed range of fermentation concentration p, design the range of weight ratio x of dehydrated water cake to supplementary carbon source, wherein: p∈[p1,p2]; x = m / (nm); Wherein, x∈[x1, x2]; m is the weight of dehydrated water cake; n is the total weight of supplementary carbon source and dehydrated water cake, (nm) is the weight of supplementary carbon source; B. The weight m of the added dewatered mud cake and the calculation formula of the weight ratio x are set in the control system 21; the control system 21 controls the mud pump 2 to work, and after the dredged mud is transported to the dewatering device 3 for dehydration to form a dewatered mud cake, the dewatering device 3 is controlled to transport the dewatered mud cake into the agitator 19. When the weight data monitored by the gravity sensing device 8 obtained by the control system 21 is m, the dewatering device 3 is controlled to stop transporting; then the crusher 5 is controlled to transport the supplementary carbon source into the agitator 19. The control system 21 calculates the weight ratio x in real time based on the data transmitted by the gravity sensing device 8. When the calculated value of the weight ratio x is within the range of [x1, x2], the crusher 5 is controlled to stop transporting the supplementary carbon source; C. The control system 21 controls the tailwater pipeline 9 to transport the fermentation liquid to the agitator 19. When the fermentation concentration p detected by the concentration sensing probe 7 obtained by the control system 21 is within the range of [p1, p2], the tailwater pipeline 9 is controlled to stop transporting the fermentation liquid. The control system 21 controls the agitator 19 to work to evenly stir the dehydrated water cake, the supplementary carbon source and the fermentation liquid. At this point, the fermentation raw material preparation is completed; Step 2: fermenting the fermentation raw material through a sludge fermentation unit, wherein the sludge fermentation unit includes a fermentation device 22 connected to the agitator 19, and a gas storage tank 23 connected to the fermentation device 22; the process of fermenting the fermentation raw material is as follows: After the fermentation raw materials are arranged in the stirrer 19, the control system 21 controls the stirrer 19 to transport the fermentation raw materials to the fermentation device 22. The fermentation device 22 stirs the fermentation raw materials through the fermentation motor. The fermentation raw materials are fermented by the fermentation device 22 to obtain the first fermentation material and the first fermentation gas. The first fermentation gas enters the gas storage tank 23 for storage, and the first fermentation material is temporarily stored in the fermentation device 22. Step 3: vacuum-treating the first fermented material by a vacuum treatment unit, wherein the vacuum treatment unit comprises a vacuum treatment device 14 connected to the fermentation device 22, and a vacuum pump 16 connected to the vacuum treatment device 14, wherein the vacuum pump 16 is connected to the gas storage tank 23, and a vacuum gauge 15 is provided on the vacuum treatment device 14 for monitoring the pressure data in the vacuum treatment device 14, wherein the vacuum treatment device 14 is electrically connected to the control system 21; the process of vacuum-treating the first fermented material is as follows: After the control system 21 controls the fermentation device 22 to transport the first fermentation material into the vacuum device, the vacuum pump 16 is started to evacuate the vacuum device. During the evacuation process, the first fermentation material will be separated into the second fermentation material and the second fermentation gas. The second fermentation material is temporarily stored in the vacuum device, and the second fermentation gas enters the gas storage tank 23 and mixes with the first fermentation gas. During the evacuation process, the control system 21 determines whether the vacuum device is completely evacuated through the pressure data measured by the vacuum meter 15 to ensure the evacuation effect. Step 4: Desulfurization and combustion treatment of the first fermentation gas and the second fermentation gas are performed by a gas processing unit, wherein the gas processing unit includes a desulfurization reactor 12, a gas furnace 13, and a gas-liquid mixer 11 which are interconnected, wherein the desulfurization reactor 12 is also connected to the gas storage tank 23, and the gas-liquid mixer 11 is also connected to the vacuum processing device 14 and the fermentation device 22; the vacuum processing device 14 is also connected to the filter press dehydrator 20; the process of desulfurization and combustion treatment of the first fermentation gas and the second fermentation gas is as follows: The gas storage tank 23 first delivers the first fermentation gas and the second fermentation gas to the desulfurization reactor 12 to remove the sulfur-containing gas in the fermentation gas, and then enters the gas furnace 13 to burn to form high-temperature steam, and the high-temperature steam enters the gas-liquid mixer 11. At the same time, the control system 21 controls the vacuum processing device 14 to deliver the second fermentation material to the gas-liquid mixer 11 to mix with the high-temperature steam to form a mixed material; Step 5: The control system 21 returns the mixed material to the fermentation device 22, and repeats steps 2 to 5 to circulate the mixed material until the fermentation raw material is completely fermented; whether the fermentation raw material is completely fermented is determined by the data monitored by the temperature sensing device 18 and the gas sensing device 17 provided in the fermentation device 22, specifically: The temperature sensing device 18 and the gas sensing device 17 are both electrically connected to the control system 21. The temperature sensing device 18 and the gas sensing device 17 monitor the temperature data and the gas concentration data in the fermentation device 22 in real time during the fermentation process, and transmit them to the control system 21. When the temperature data monitored by the temperature sensing device 18 acquired by the control system 21 reaches 20-25°C, and the gas sensing device 17 does not detect the gas concentration data, it is judged that the fermentation raw material is completely fermented; Step 6: The control system 21 transports the completely fermented material in the fermentation device 22 to the filter press dehydrator 20 for dehydration treatment to obtain the treated dredged sludge and tail water. The treated dredged sludge can be stored in the sludge storage vehicle 10 as a biomass fertilizer product, and the tail water can be transported to the agitator 19 through the tail water pipeline 9; The fermentation liquid in the first round of fermentation raw materials is tap water, which is manually added into the agitator 19 by the staff; the fermentation liquid in the fermentation raw materials other than the first round is tail water, which is obtained by dehydrating the fermentation raw materials that have been completely fermented in the previous round through the filter press dehydrator 20.

[0020] In the above technical scheme, the present invention realizes intelligent configuration of fermentation raw materials through the control system 21 and the sludge pretreatment unit to ensure that the fermentation raw materials have an optimal moisture content, which can improve the subsequent fermentation effect; in the fermentation process, the fermentation gas generated by the fermentation is collected by the gas storage tank 23, and the gas is desulfurized and burned to form high-temperature steam, which is then returned to the fermentation device 22, and the high-temperature steam is used to achieve high-temperature digestion of the fermentation raw materials. The high-temperature digestion method is used to passivate the heavy metals in the dredged sludge, so as to achieve the purpose of removing the heavy metals in the dredged sludge without using a curing agent, and will not cause secondary pollution. At the same time, the high-temperature steam can improve the fermentation efficiency, reduce the viscosity of the material, and improve the fermentation effect; the vacuum pump 16 is used to heat the first generator The fermentation material is vacuumed to separate the residual ammonia in the first fermentation material, reduce the inhibitory effect of ammonia on fermentation, and improve the efficiency of material fermentation; the material after complete fermentation is separated by dehydration, and the tail water is returned as the fermentation liquid for fermentation, making full use of the fermentation bacteria therein, which can further improve the fermentation efficiency, and the sludge can be prepared into high-quality biomass fertilizer after treatment, realizing the resource utilization of dredged sludge; during the whole process of treating the dredged sludge, the interconnected devices are connected through the connecting pipe, and an electric valve can be correspondingly arranged on the connecting pipe, and the electric valve is electrically connected to the control system 21, and the connection or disconnection between the devices is achieved by controlling the opening and closing of the electric valve, thereby achieving the purpose of material transmission.

[0021] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for intelligent treatment of dredged sludge, characterized in that: The following steps are involved: S1, preparing fermentation raw materials, wherein the fermentation raw materials are composed of dehydrated water cake, supplementary carbon source and fermentation liquid; the dehydrated water cake is formed by dehydrating dredged sludge, and the supplementary carbon source is agricultural and forestry waste; S2, fermenting the fermentation raw material to obtain a first fermentation material and a first fermentation gas; vacuum-treating the first fermentation material to obtain a second fermentation material and a second fermentation gas; collecting the first fermentation gas and the second fermentation gas, desulfurizing and burning the first fermentation gas and the second fermentation gas to obtain high-temperature steam, and mixing the high-temperature steam with the second fermentation material to obtain a mixed material; S3, repeat step S2, and circulate the mixed material until the fermentation raw material is completely fermented; S4, using a filter press dehydrator to dehydrate the fermented raw materials that have been completely fermented to obtain treated dredged sludge and tail water; The fermentation liquid in the first round of fermentation raw materials is tap water, and the fermentation liquid in the fermentation raw materials other than the first round is tail water.

2. The intelligent treatment method for dredged sludge according to claim 1, characterized in that: In S1, fermentation materials are configured using a sludge pretreatment unit, the sludge pretreatment unit includes a sludge storage tank and a dewatering device that are interconnected, an agitator that is connected to the dewatering device and a crusher, and a tail water pipeline that is connected to the agitator and the filter press dewatering machine; the sludge storage tank is used to store dredged sludge, the crusher is used to store a supplementary carbon source, the dredged sludge is pumped into the dewatering device by a slurry pump arranged in the sludge storage tank, and is dehydrated by the dewatering device to form a dehydrated mud cake; the dehydrated mud cake, the supplementary carbon source and the tail water are respectively transported to the agitator through a first conveying pipeline, a second conveying pipeline and a tail water pipeline, and stirred to obtain a fermentation raw material.

3. The intelligent treatment method for dredged sludge according to claim 2, characterized in that: The sludge pretreatment unit further comprises a gravity sensing device arranged in the agitator for monitoring the weight of the material, and a concentration sensing probe for measuring the fermentation concentration x in the agitator. The sludge pretreatment unit is controlled by a control system. In S1, the fermentation raw material is configured by the following method: A. Design the range of fermentation raw material fermentation concentration p. Based on the designed range of fermentation concentration p, design the range of weight ratio x of dehydrated water cake to supplementary carbon source, wherein: p∈[p1,p2]; x = m / (nm); Wherein, x∈[x1, x2]; m is the weight of dehydrated water cake; n is the total weight of supplementary carbon source and dehydrated water cake, (nm) is the weight of supplementary carbon source; B. The weight m of the added dewatered mud cake and the calculation formula of the weight ratio x are set in the control system; the control system controls the mud pump to transport the dredged mud to the dewatering device for dehydration to form dewatered mud cake, and then controls the dewatering device to transport the dewatered mud cake to the agitator. When the weight data monitored by the gravity sensing device acquired by the control system is m, the dewatering device is controlled to stop transporting; then the crusher is controlled to transport the supplementary carbon source to the agitator. The control system calculates the weight ratio x in real time based on the data transmitted by the gravity sensing device. When the calculated value of the weight ratio x is within the range of [x1, x2], the crusher is controlled to stop transporting the supplementary carbon source; C. The control system controls the tail water pipeline to transport the fermentation liquid into the agitator. When the fermentation concentration p detected by the concentration sensing probe obtained by the control system is within the range of [p1, p2], the tail water pipeline is controlled to stop transporting the fermentation liquid. At this point, the preparation of the fermentation raw materials is completed.

4. The intelligent treatment method for dredged sludge according to claim 3, characterized in that: In S2, the fermentation raw material is fermented by a sludge fermentation unit, wherein the sludge fermentation unit includes a fermentation device connected to the agitator, and a gas storage tank connected to the fermentation device, wherein the gas storage tank is used to store the first fermentation gas and the second fermentation gas.

5. The intelligent treatment method for dredged sludge according to claim 4, characterized in that: In S2, the first fermented material is vacuum-treated by a vacuum treatment unit, wherein the vacuum treatment unit comprises a vacuum treatment device connected to a fermentation device, and a vacuum pump connected to the vacuum treatment device, wherein the vacuum pump is connected to a gas storage tank.

6. The intelligent treatment method for dredged sludge according to claim 5, characterized in that: In S2, the first fermentation gas and the second fermentation gas are desulfurized and burned by a gas processing unit, and the gas processing unit includes a desulfurization reactor, a gas furnace, and a gas-liquid mixer that are interconnected. The desulfurization reactor is also connected to the gas storage tank, and the gas-liquid mixer is also connected to the vacuum processing device and the fermentation device; the vacuum processing device is also connected to the filter press dehydrator.

7. The intelligent treatment method for dredged sludge according to claim 4, characterized in that: The sludge fermentation unit also includes a temperature sensing device and a gas sensing device for monitoring temperature data and gas concentration data in the fermentation device respectively, and the temperature sensing device and the gas sensing device are both electrically connected to the control system; in S3, when the temperature data monitored by the temperature sensing device obtained by the control system reaches 20-25°C and the gas sensing device does not detect gas concentration data, the fermentation raw material is completely fermented.

8. The intelligent treatment method for dredged sludge according to claim 5, characterized in that: The vacuum processing device is provided with a vacuum gauge for monitoring the pressure data in the vacuum processing device. The vacuum processing device is electrically connected to the control system.

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