Sludge dewatering and granulating agent, equipment and method

Abstract

The invention relates to the technical field of sludge treatment, and provides a sludge dewatering and granulating agent, device and method, and the agent comprises a compound agent and sodium silicate; the mass of the compound agent is 2-5% of the mass of the sludge; the mass of the sodium silicate is 50-60% of the mass of the compound agent; the compound agent comprises blast furnace slag and potassium ferrate; the mass ratio of the blast furnace slag to the potassium ferrate in the compound medicament is (10-20): 1. The method comprises the following steps: adding the compound agent into sludge, and stirring to react for 5-10 minutes; adding sodium silicate into the sludge, and stirring for 20-30 minutes; and carrying out filter pressing and granulation treatment on the conditioned sludge to form sludge particles. By integrating and optimizing the sludge treatment process, the treatment efficiency is improved, and the environmental pollution is reduced. The structure is simple, the operation is convenient, and the operation and maintenance cost can be reduced while the treatment effect is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a sludge dehydration granulation agent, equipment and method. Background Art

[0002] With the acceleration of industrialization, the amount of residual sludge generated by industrial wastewater treatment facilities has increased dramatically. Traditionally, these sludges are mainly disposed of by landfill. However, landfill treatment has significant disadvantages, especially at a time when environmental quality requirements are increasing. First, the landfilled sludge will emit an unpleasant odor during the natural decomposition process, which seriously affects the quality of life of surrounding residents. Secondly, the sludge contains a large amount of heavy metals and other harmful substances, which may penetrate into the soil and groundwater with rainwater, causing long-term negative impacts on the environment.

[0003] In view of these problems, some regions have begun to try to dig up sludge from landfills for harmless treatment by incineration. However, due to the terrain or structural restrictions in some areas of the landfill, it is difficult to dig directly using machinery. In addition, before incineration, the sludge must be dehydrated to reduce processing costs and time, which is usually done by suction and plate and frame filter pressing. Despite this, the moisture content of the sludge after plate and frame filter pressing is still higher than 60%, which not only increases transportation costs, but also makes it difficult to use the sludge directly for incineration.

[0004] Therefore, developing a technology to effectively reduce the moisture content of sludge to facilitate the transportation and incineration of sludge has become a technical problem that urgently needs to be solved. Summary of the invention

[0005] In response to the above-mentioned problems in the prior art, the present application proposes a sludge dehydration and granulation agent, equipment and method, which improves the sludge dehydration and subsequent natural drying effect through dehydration and granulation, and reduces the subsequent sludge transportation and incineration costs.

[0006] In the first aspect, the present invention proposes a sludge dehydration and granulation agent, comprising: a compound agent and sodium silicate; the mass of the compound agent is 2%-5% of the mass of the sludge; the mass of the sodium silicate is 50%-60% of the mass of the compound agent; the compound agent includes blast furnace slag and potassium ferrate; the mass ratio of the blast furnace slag to the potassium ferrate in the compound agent is 10-20:1.

[0007] In a second aspect, the present invention provides a sludge dehydration and granulation method, comprising the following steps:

[0008] The initial moisture content of the conditioned sludge is 90% ± 2%;

[0009] Add the compound reagent to the sludge, fully mix the compound reagent and the sludge at a stirring speed of 20-30 r / min, and stir for 5-10 minutes; wherein the mass of the compound reagent is 2%-5% of the mass of the sludge; the compound reagent comprises blast furnace slag and potassium ferrate; the mass ratio of the blast furnace slag to the potassium ferrate in the compound reagent is 10-20:1;

[0010] Adding sodium silicate with a mass of 50%-60% of the mass of the compound agent to the sludge, stirring at a stirring speed of 20-30 r / min for 20-30 minutes to complete sludge conditioning;

[0011] The conditioned sludge is subjected to filter pressing and granulation treatment to form sludge particles.

[0012] Furthermore, the method further comprises the step of: subjecting the sludge particles to natural air drying or mechanical drying.

[0013] In a third aspect, the present invention provides a sludge dehydration and granulation equipment, including a sludge stirring and conditioning tank, a reagent dosing device and a filter press device;

[0014] The reagent dosing device is connected to the sludge stirring and conditioning tank, and is used to add chemical reagents into the sludge stirring and conditioning tank; wherein the chemical reagents include: compound reagents and sodium silicate; the mass of the compound reagents is 2%-5% of the mass of the sludge; the mass of the sodium silicate is 50%-60% of the mass of the compound reagents; the compound reagents include blast furnace slag and potassium ferrate; the mass ratio of the blast furnace slag to the potassium ferrate in the compound reagents is 10-20:1;

[0015] The sludge stirring and conditioning tank is provided with a stirring paddle for mixing sludge and chemical agents and a moisture content sensor for real-time monitoring of the moisture content of the sludge; the sludge stirring and conditioning tank is also provided with a sludge feed port and a discharge port;

[0016] The filter press device includes an outer shell and a screw conveyor arranged in the outer shell; a feed inlet is arranged at one end of the outer shell, and the feed inlet is connected to the discharge port of the sludge stirring and conditioning tank; and a granulation port is arranged at the other end of the outer shell at the end of the screw conveyor.

[0017] Furthermore, the screw conveyor includes a spiral stirring blade and a filter screen mounted outside the spiral stirring blade; and the outer shell is provided with a water outlet.

[0018] Furthermore, the granulation port comprises a porous plate.

[0019] Furthermore, the sludge feed port of the sludge stirring and conditioning tank is eccentrically inclined and points toward the center of the sludge stirring and conditioning tank.

[0020] Furthermore, the sludge feed port is provided with a vortex nozzle.

[0021] Furthermore, the agent dosing device includes a silo; the lower end of the silo is a conical structure and is connected to the sludge stirring and conditioning tank.

[0022] Furthermore, the agent dosing device also includes a screw conveying system, the inlet of the screw conveying system is connected to the lower end of the silo, and the outlet of the screw conveying system is connected to the sludge stirring and conditioning tank.

[0023] Furthermore, the stirring paddle includes a plurality of V-shaped blades.

[0024] Furthermore, the stirring paddle is also connected to a stirring driving member.

[0025] The beneficial effects of the present invention include:

[0026] Significantly improve sludge dehydration efficiency: The dehydration granulation agent of the present invention can effectively oxidize the highly viscous organic matter in the sludge by combining the strong alkalinity of blast furnace slag and the strong oxidizing property of potassium ferrate, significantly improve the water holding capacity of sludge particles, and make the sludge dehydration process more efficient. The sodium silicate in the agent further accelerates the dehydration and solidification of the sludge, so that the sludge reaches a lower water content in a short time, which helps facilitate subsequent treatment.

[0027] Improve sludge hardening and particle strength: The present invention stimulates the formation of calcium silicate hydrate (CSH) and calcium aluminate hydrate (CAH) through the composite action of blast furnace slag and potassium ferrate, which greatly enhances the hardening effect of sludge particles. Blast furnace slag is a solid waste formed by gangue in ore, ash in fuel and non-volatile components in solvent (generally limestone) during blast furnace ironmaking. It mainly contains oxides of calcium, silicon, aluminum, magnesium, and iron, and a small amount of sulfide. The added sodium silicate can further react with the -SH bond of sulfur-containing amino acids in the sludge to generate compounds with high mechanical strength, thereby improving the strength and stability of sludge particles and reducing the breakage or disintegration of particles during subsequent transportation, storage or incineration.

[0028] Reduce treatment costs and energy consumption: By improving the efficiency of sludge dehydration and solidification, the present invention can significantly reduce the moisture content of sludge in the early stage of sludge treatment, thereby reducing the energy consumption and cost of subsequent drying, transportation and incineration. At the same time, the higher hardness of sludge particles reduces the wear on granulation and subsequent treatment equipment, further reducing equipment maintenance and operation costs.

[0029] Reduce secondary pollution and have excellent environmental performance: The components of the agent of the present invention have been optimized and designed to minimize the negative impact on the environment during the sludge treatment process. Through dehydration and solidification reactions, the release of harmful components in the sludge is effectively controlled, avoiding the common sewage and gas pollution problems in the traditional sludge treatment process, and effectively reducing the risk of secondary pollution.

[0030] Improve the resource utilization rate of sludge: The dehydration granulation agent of the present invention can not only improve the dehydration effect of sludge, but also give the sludge particles higher stability and strength during the granulation process, so that the sludge particles can be more easily used for subsequent resource utilization, such as building materials, fuel, etc. This feature greatly improves the resource utilization rate of sludge and promotes the development of the circular economy of sludge treatment.

[0031] Simplified process and convenient operation: The equipment of the present invention can realize automatic control, including a series of processes such as automatic dosing, stirring, dehydration and granulation, and can realize an efficient and continuous sludge treatment process. The real-time monitoring and automatic adjustment functions reduce the necessity of human intervention, simplify the operation process, improve the treatment efficiency, and facilitate large-scale industrial application.

[0032] The sludge dehydration and granulation equipment of the present invention not only improves the treatment efficiency but also reduces environmental pollution by integrating and optimizing the sludge treatment process. The equipment has a simple structural design and is easy to operate, and can reduce the cost of operation and maintenance while ensuring the treatment effect. In addition, the hydration treatment process of industrial waste blast furnace slag under the action of a self-made compound agent improves the dehydration and hardening effect of the sludge, which is more conducive to subsequent granulation treatment.

[0033] Promote subsequent treatment and resource recovery: The treated sludge has low water content and is granulated, making it more suitable for subsequent incineration or other resource recovery treatments, such as biomass energy recovery. This not only improves the depth of sludge treatment, but also promotes the recycling of resources, which meets the current requirements of environmental protection and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the process of the sludge dehydration and granulation method of the present invention;

[0035] Figure 2 It is a schematic diagram of the structure of the sludge dewatering and granulation equipment of the present invention.

[0036] In the figure, 1-sludge mixing and conditioning tank; 2-drug dosing device; 3-mixing paddle; 4-discharge port; 5-filter press device; 6-granulation port; 7-spiral mixing blade; 8-filter screen; 9-water outlet; 10-servo motor; 11-PLC control system; 12-vortex nozzle; 13-water content sensor; 14-screw conveying system. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] The sludge dehydration granulation agent proposed by the present invention comprises: a compound agent and sodium silicate; the mass of the compound agent is 2%-5% of the mass of the sludge; the mass of the sodium silicate is 50%-60% of the mass of the compound agent; the compound agent comprises blast furnace slag and potassium ferrate; the mass ratio of the blast furnace slag to the potassium ferrate of the compound agent is 10-20:1.

[0039] The method for implementing sludge dehydration and granulation using the above-mentioned sludge dehydration and granulation agent comprises the following steps:

[0040] The initial moisture content of the conditioned sludge is 90% ± 2%;

[0041] Add the compound reagent to the sludge, fully mix the compound reagent and the sludge at a stirring speed of 20-30r / min, and stir for 5-10 minutes; wherein the mass of the compound reagent is 2%-5% of the mass of the sludge; the compound reagent includes blast furnace slag and potassium ferrate; the mass ratio of the blast furnace slag to potassium ferrate in the compound reagent is 10-20:1;

[0042] Add 50%-60% of the mass of the compound reagent to the sludge, maintain a stirring speed of 20-30r / min and stir for 20-30 minutes to complete the sludge conditioning;

[0043] The conditioned sludge is subjected to filter pressing and granulation treatment to form sludge particles;

[0044] The sludge particles are naturally air-dried or mechanically dried.

[0045] like Figure 2 As shown, the sludge dehydration and granulation equipment for implementing the above method includes a sludge stirring and conditioning tank 1, a reagent dosing device 2, a filter press device 5 and a PLC control system 11;

[0046] The chemical adding device 2 is connected to the sludge stirring and conditioning tank 1, and is used to add chemical agents into the sludge stirring and conditioning tank 1; wherein the chemical agent is the above-mentioned sludge dehydration and granulation agent.

[0047] The sludge stirring and conditioning tank 1 is provided with a stirring paddle for mixing sludge and chemical agents and a time domain reflectometry (TDR) moisture sensor 13 for real-time monitoring of sludge moisture content; the sludge stirring and conditioning tank 1 is also provided with a sludge feed port and a discharge port 4; the agent dosing device 2 includes a silo and a screw conveying system 14; the lower end of the silo is a conical structure, the inlet of the screw conveying system 14 is connected to the lower end of the silo, and the outlet of the screw conveying system 14 is connected to the sludge stirring and conditioning tank 1. The screw conveying system 14 accurately controls the amount of agent added to ensure that the agent in the silo can be evenly distributed in the sludge-water mixture, thereby improving the treatment effect.

[0048] The ends of the stirring paddle 3 and the screw conveying system 14 are both provided with a servo motor 10. The servo motor 10, the moisture sensor 13 and the screw conveyor of the filter press 5 are all connected to the PLC control system 11 by electrical signals. The PLC control system 11 is used to realize automatic dehydration and granulation of the sludge, and the stirring speed and stirring reaction time can be automatically adjusted in combination with the moisture content. The moisture sensor 13 feeds back the moisture content of the sludge to the PLC control system 11, and adjusts the dosage of the agent through a preset algorithm. The PLC control system 11 also controls the output shaft speed of the servo motor 10 of the screw conveying system 14 to control the precise addition of the agent, avoiding errors caused by manual addition and the harm of the agent to the human body.

[0049] The stirring paddle includes a plurality of V-shaped blades. Four V-shaped blades are provided with an angle of 30 degrees to improve stirring efficiency and uniformity. The rotation speed of the stirring paddle 3 is set between 20-30r / min, and its rotation direction is designed to be opposite to the spiral direction of the sludge flow, which helps to prevent the sludge from settling during the conditioning process.

[0050] The filter press device 5 includes an outer shell and a screw conveyor arranged in the outer shell; a feed port is arranged at one end of the outer shell, and the feed port is connected to the discharge port 4 of the sludge stirring and conditioning tank 1, and a granulation port 6 is arranged at the other end of the outer shell at the end of the screw conveyor. The screw conveyor includes a spiral stirring blade 7 and a filter screen 8 sleeved outside the spiral stirring blade 7; the outer shell is provided with a water outlet 9 for discharging wastewater generated during the filtration process. The granulation port 6 includes a porous plate with an aperture of 1-2 cm. Such a design helps to form sludge particles of a certain size, which is convenient for subsequent treatment or use. The spiral stirring blade 7 of the screw conveyor works continuously, and the sludge entering the screw conveyor is continuously conveyed toward the granulation port 6, and the sludge is squeezed, and the water in the sludge is squeezed and discharged through the filter screen 8 and the water outlet 9, and the sludge after the filter press is discharged from the granulation port 6. After the filter press and granulation treatment, the average moisture content of the sludge is reduced to about 55%. In order to further reduce the moisture content, the granulated sludge can be placed under natural conditions for drying. Within two days, the moisture content is further reduced to below 40%, which significantly improves the drying degree and disposal efficiency of the sludge.

[0051] The sludge feed port is provided with a vortex nozzle 12, which increases the flow rate of the sludge by causing the sludge to rotate. After the sludge enters the vortex nozzle 12, a vortex is generated, and the rotating sludge is accelerated and ejected at a high speed, thereby achieving full contact and mixing between the sludge and the reagent.

[0052] In some embodiments, the sludge feed port of the sludge stirring and conditioning tank 1 is eccentrically tilted and directed toward the center of the sludge stirring and conditioning tank 1. The special design of the eccentric tilt of the sludge feed port allows the sludge to be sprayed into the central reaction chamber of the sludge stirring and conditioning tank 1 in an oblique manner off-center, thereby achieving full contact and mixing between the sludge and the reagent. This design is intended to enhance the mixing effect, extend the flow path of the sludge in the reaction chamber, and optimize the chemical reaction time and efficiency.

[0053] like Figure 1 As shown, the method for implementing sludge dehydration and granulation using the above-mentioned sludge dehydration and granulation agent and sludge dehydration and granulation equipment specifically includes the following steps:

[0054] S1. Sludge conditioning: Take the industrial sludge to be treated, add water to stir it into a slurry state, and control the initial moisture content of the sludge to be 90%±2%. Under stirring conditions, add the dehydration granulation agent of the present invention in proportion through the agent dosing device 2. The agent is composed of blast furnace slag, potassium ferrate and sodium silicate, wherein the mass ratio of blast furnace slag to potassium ferrate is 10-20:1, and the addition amount of sodium silicate is 50%-60% of the mass of the composite agent composed of blast furnace slag and potassium ferrate.

[0055] S2. Reaction of the compound reagent composed of blast furnace slag and potassium ferrate with sludge: In a stirring tank at a stirring speed of 20-30r / min, the compound reagent of blast furnace slag and potassium ferrate is fully mixed with the sludge, stirred and reacted for 5-10 minutes to ensure that the organic matter in the sludge fully reacts with the strong oxidizing components of the reagent, so that the highly viscous organic matter is effectively oxidized and the water holding capacity is greatly reduced.

[0056] S3. Adding sodium silicate: After the sludge reacts with the compound reagent of blast furnace slag and potassium ferrate for 5-10 minutes, add sodium silicate at 50%-60% of the mass of the compound reagent. The addition of sodium silicate can accelerate the hardening process of the sludge, and form hydrated calcium silicate (CSH) and hydrated calcium aluminate (CAH) with the -SH bond of sulfur-containing amino acids in the sludge, further enhancing the hardness and strength of the sludge particles.

[0057] S4. Continue stirring reaction: After adding sodium silicate, continue stirring at a speed of 20-30r / min for 20-30 minutes to ensure that sodium silicate is fully in contact with sludge particles and complete the reaction. This stage will promote the hydration reaction of sludge and improve the dehydration efficiency and mechanical strength of sludge.

[0058] S5. Automatic control: The moisture sensor 13 monitors the moisture content of the sludge in real time. The moisture sensor 13 is connected to the PLC control system 11 and can automatically adjust the dosage ratio and stirring speed according to the change of moisture content to ensure the addition accuracy and stirring effect of the agent. The PLC system is equipped with an HMI interface, and the operator can manually control the system through the interface to adjust the dosage ratio of blast furnace slag, potassium ferrate and sodium silicate.

[0059] S6, sludge filtration and granulation: The conditioned sludge enters the filter press device 5 through the outlet 4 of the sludge stirring and conditioning tank 1, and the water in the sludge is squeezed out by the screw conveyor and the filter screen 8, and the filtrate is discharged from the outlet 9, and the water content of the sludge is further reduced. Then, the dehydrated sludge is discharged through the granulation port 6, which adopts a porous plate design with a pore size of 1-2 cm to squeeze the sludge into a noodle shape, which is convenient for subsequent drying and incineration.

[0060] S7. Drying of sludge particles: The squeezed sludge is sent to the drying site through a conveyor belt for natural air drying or mechanical drying. Since the sludge has been treated with chemicals, the moisture content is low, the drying process is fast, and the particle strength is high, and it is not easy to break during transportation or processing.

[0061] Implementation case 1:

[0062] A steel plant has long faced the problem of sludge treatment. The sludge has a high water content (about 92%) and high viscosity. It is difficult to achieve the ideal dehydration effect through traditional mechanical filter pressing, and a large amount of secondary pollution is easily generated during the subsequent incineration treatment process. Therefore, the plant decided to use the dehydration granulation agent and complete set of equipment of the present invention for treatment.

[0063] The sludge from the steel plant is pretreated, and the sludge is stirred evenly by a slurrying device, and the initial moisture content is controlled to be 90% ± 2%. A compound agent is added according to 3% of the mass of the sludge, and the compound agent is made by mixing blast furnace slag and potassium ferrate in a mass ratio of 10:1. The stirring paddle 3 of the stirring and conditioning tank is set to 25r / min, and stirred for 5 minutes to ensure that the sludge and the agent are fully mixed and reacted. After the agent reacts with the sludge for 5 minutes, 55% of the mass of the compound agent is added. The sludge is continued to be stirred at a speed of 25r / min for 20 minutes, and the sodium silicate reacts with the sludge and other agents to further improve the sludge dehydration effect. The sludge after stirring is dehydrated by a filter press 5, and the moisture content of the sludge is reduced from 90% ± 2% to about 50%. The dehydrated sludge is extruded through a granulation port 6 to form a noodle shape with a diameter of about 1.5 cm, with a uniform shape and high strength.

[0064] The moisture content of sludge was reduced from 92% to 50%, significantly improving the dehydration efficiency. Through the treatment of the agent, the strength of the sludge particles was improved, and the particles were not easy to break during the incineration process, reducing dust and gas pollution. There was no obvious secondary pollution in the entire treatment process, and the filtrate met the environmental emission standards. Due to the reduction in the moisture content of the sludge, the energy consumption of subsequent transportation and incineration was reduced, and the treatment cost was reduced by about 30%.

[0065] Implementation case 2:

[0066] A municipal sewage treatment plant produces a large amount of sludge with a water content of about 88% every day. The sludge is bulky and has high treatment costs. The high water content of the sludge makes it difficult to transport and incinerate the sludge. The treatment plant introduces the dehydration granulation agent and complete set of equipment of the present invention to try to reduce the water content of the sludge and optimize the subsequent treatment of the sludge particles.

[0067] The sludge from the municipal sewage treatment plant is pulped and the moisture content is adjusted to 90% ± 2%. The compound agent of the present invention is added according to 4% of the mass of the sludge, and the blast furnace slag and potassium ferrate are compounded at a mass ratio of 20:1. The sludge stirring and conditioning tank is stirred at a speed of 30r / min for 7 minutes to fully mix the agent with the sludge, promote the oxidation and hydration reaction of the blast furnace slag and potassium ferrate, and modify the organic matter in the sludge. After the agent and the sludge are mixed and reacted for 7 minutes, 50% of the mass of the compound agent is added. Sodium silicate, and stirring is continued for 25 minutes to promote the hardening and dehydration of the sludge. The sludge is subjected to filter pressing treatment through a filter pressing device, and the moisture content of the sludge is reduced to about 47%. The filtrate generated during the filter pressing process meets the environmental protection emission standards after treatment. The sludge after filter pressing is extruded through a granulating device to form particles with a diameter of about 2 cm. The particles have high strength and stable structure, which is convenient for subsequent drying and processing. The dried sludge particles are used in cement preparation as part of cement raw materials, realizing the resource utilization of sludge.

[0068] The moisture content of sludge was reduced from 88% to 47%, which significantly reduced the volume of sludge. The granulated sludge particles have high strength and can be stably used in building materials after drying, which has good resource utilization value. There is no secondary pollution in the entire sludge treatment process, and the filtrate treatment meets the discharge standards and meets environmental protection requirements. The sludge volume is significantly reduced, and the transportation and treatment costs are reduced by 40%. The treated sludge is successfully used in building materials production, realizing the resource utilization of sludge and increasing economic benefits.

[0069] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A sludge dehydration granulation agent, characterized in that: include: Compounding agents and sodium silicate; The mass of the compound reagent is 2%-5% of the mass of the sludge; The mass of the sodium silicate is 50%-60% of the mass of the compound agent; the compound agent includes blast furnace slag and potassium ferrate; the mass ratio of the blast furnace slag to the potassium ferrate in the compound agent is 10-20:

1.

2. A sludge dehydration and granulation method, characterized in that: The following steps are involved: The initial moisture content of the conditioned sludge is 90% ± 2%; Add the compound reagent to the sludge, fully mix the compound reagent and the sludge at a stirring speed of 20-30 r / min, and stir for 5-10 minutes; wherein the mass of the compound reagent is 2%-5% of the mass of the sludge; the compound reagent comprises blast furnace slag and potassium ferrate; the mass ratio of the blast furnace slag to the potassium ferrate in the compound reagent is 10-20:1; Adding sodium silicate with a mass of 50%-60% of the mass of the compound agent to the sludge, stirring at a stirring speed of 20-30 r / min for 20-30 minutes to complete sludge conditioning; The conditioned sludge is subjected to filter pressing and granulation treatment to form sludge particles.

3. A sludge dehydration and granulation method according to claim 2, characterized in that: The method also includes the step of: subjecting the sludge particles to natural air drying or mechanical drying.

4. A sludge dehydration and granulation equipment, characterized in that: It includes a sludge stirring and conditioning tank, a reagent dosing device and a filter press device; The reagent dosing device is connected to the sludge stirring and conditioning tank, and is used to add chemical reagents into the sludge stirring and conditioning tank; wherein the chemical reagents include: compound reagents and sodium silicate; the mass of the compound reagents is 2%-5% of the mass of the sludge; the mass of the sodium silicate is 50%-60% of the mass of the compound reagents; the compound reagents include blast furnace slag and potassium ferrate; the mass ratio of the blast furnace slag to the potassium ferrate in the compound reagents is 10-20:1; The sludge stirring and conditioning tank is provided with a stirring paddle for mixing sludge and chemical agents and a moisture content sensor for real-time monitoring of the moisture content of the sludge; the sludge stirring and conditioning tank is also provided with a sludge feed port and a discharge port; The filter press device includes an outer shell and a screw conveyor arranged in the outer shell; a feed inlet is arranged at one end of the outer shell, and the feed inlet is connected to the discharge port of the sludge stirring and conditioning tank; and a granulation port is arranged at the other end of the outer shell at the end of the screw conveyor.

5. The dewatering and granulating equipment for landfill mineralized industrial sludge according to claim 4, characterized in that: The screw conveyor comprises a spiral stirring blade and a filter screen sleeved outside the spiral stirring blade; the outer shell is provided with a water outlet.

6. The dewatering and granulating equipment for landfill mineralized industrial sludge according to claim 4, characterized in that: The granulation port comprises a porous plate.

7. The dewatering and granulating equipment for landfill mineralized industrial sludge according to claim 4, characterized in that: The sludge feed port of the sludge stirring and conditioning tank is eccentrically inclined and points toward the center of the sludge stirring and conditioning tank.

8. The dewatering and granulating equipment for landfill mineralized industrial sludge according to claim 4, characterized in that: The sludge feed port is provided with a vortex nozzle.

9. The dewatering and granulating equipment for landfill mineralized industrial sludge according to claim 4, characterized in that: The drug dosing device comprises a silo; the lower end of the silo is a conical structure and is connected to the sludge stirring and conditioning tank.

10. The dewatering and granulating equipment for landfill mineralized industrial sludge according to claim 9, characterized in that: The drug dosing device also includes a screw conveying system, the inlet of the screw conveying system is connected to the lower end of the silo, and the outlet of the screw conveying system is connected to the sludge stirring and conditioning tank.

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