Sludge treatment system and process

Abstract

The present application discloses a kind of sludge treatment system and process, including heat grinder, wood chip conveyor, drying pipeline and cyclone separator, heat grinder includes cooking chamber and heat grinding chamber, heat grinding chamber is set to the downstream of cooking chamber;The wood chip conveyor is installed in the upper portion of cooking chamber, and heat grinding chamber is connected with the upstream end of drying pipeline by slurry discharge pipe, and sludge conveying device is also provided on the slurry discharge pipe;The upstream end of drying pipeline is provided with fan, and the inlet of fan is hot air port, and the downstream end of drying pipeline is connected with cyclone separator, and the lower portion of cyclone separator is provided with material receiving conveyor;The present application utilizes the heat grinding process of heat grinder and the hot air drying process of drying pipeline, cooks wood chip, heat grinds and then fully mixes with sludge to become fibrous biomass material after drying, the required equipment of entire system is less, mature technology, simple structure, without adding various reaction accessories, maintenance cost is low, the product after sewage treatment has the advantages such as wide use range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sludge treatment, in particular to a sludge treatment system and process. BACKGROUND

[0002] With the rapid development of economy, the rapid increase of urban population, the increasing discharge of industrial wastewater and domestic sewage, and the rapid increase of sludge output. Sludge is a sedimentary material produced in the wastewater treatment process, which includes solid particles such as sand, fibers, plant and animal residues mixed into domestic sewage or industrial and mining wastewater, and their flocculation, various colloids, organic matter, adsorbed metal elements, microorganisms, bacteria, and insect eggs. In short, it is the solid part of sewage. If the sludge is not properly treated, it will directly cause secondary pollution to water bodies and the atmosphere.

[0003] The existing patent "2019208116076" authorized by the State Intellectual Property Office, named "Sludge ecological disposal deep treatment system". The technical solution of the sludge treatment system disclosed in the patent "includes a dewatering pretreatment device (1), a drying device, a harmless treatment device, and a sintering machine (5) connected in sequence. The dewatering pretreatment device (1) includes a sludge stirring tank (6) and an ultrahigh-pressure sludge dewatering filter press (12). The upper opening of the sludge stirring tank (6) is connected with a sludge conveying mechanism. The lower outlet of the sludge stirring tank (6) is connected with the ultrahigh-pressure sludge dewatering filter press (12) through a pretreatment sludge pipe (11). The harmless treatment device is a thermal grinder (3)". However, the sludge treatment system mainly treats the sludge itself by physical and chemical methods. The process equipment is complex, and many catalytic auxiliary materials are added. The maintenance cost is also high. The products can only be used for light aggregate, partition material or soundproof wall, pedestrian permeable brick, pipeline engineering backfill material, asphalt mixing material, gardening or environmental greening material, sewage treatment filter material, etc. The range of use is narrow. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the existing defects and provide a sludge treatment system and process. The entire system requires less equipment, is mature in technology, simple in structure, does not require the addition of various reaction auxiliary materials, has low maintenance cost, and has a wide range of uses after sewage treatment. The problems in the background art can be effectively solved.

[0005] To achieve the above object, the present application provides the following technical scheme: a sludge treatment system, comprising a thermal grinder, a wood chip conveyor, a drying pipeline and a cyclone separator, the thermal grinder comprises a cooking chamber and a thermal grinding chamber, and the thermal grinding chamber is arranged downstream of the cooking chamber; the wood chip conveyor is installed on the upper portion of the cooking chamber, the thermal grinding chamber is connected with the upstream end of the drying pipeline through a slurry discharge pipe, and a sludge conveying device is connected to the slurry discharge pipe; the upstream end of the drying pipeline is provided with a fan, and the inlet of the fan is a hot air inlet; the downstream end of the drying pipeline is connected with the cyclone separator, and a receiving conveyor is arranged below the cyclone separator.

[0006] Further, the sludge conveying device comprises a sludge pump and a sludge conveying pipeline, and the sludge pump is connected with the slurry discharge pipe of the thermal grinding chamber through the sludge conveying pipeline.

[0007] Further, the sludge conveying device comprises a sludge pump and a sludge conveying pipeline, and the sludge pump is connected with the slurry discharge pipe of the thermal grinding chamber through the sludge conveying pipeline.

[0008] Further, a granulator is installed downstream of the receiving conveyor.

[0009] To achieve the above object, the present application further provides the following technical scheme: a sludge treatment system, comprising a thermal grinder, a wood chip conveyor, a drying pipeline and a cyclone separator, the thermal grinder comprises a cooking chamber and a thermal grinding chamber, and the thermal grinding chamber is arranged downstream of the cooking chamber; the upstream of the thermal grinder is connected with a sludge conveying device; the wood chip conveyor is installed on the upper portion of the cooking chamber, and the thermal grinding chamber is connected with the upstream end of the drying pipeline through a slurry discharge pipe; the upstream end of the drying pipeline is provided with a fan, and the inlet of the fan is a hot air inlet; the downstream end of the drying pipeline is connected with the cyclone separator, and a receiving conveyor is arranged below the cyclone separator.

[0010] Further, the sludge conveying device comprises a sludge pump and a sludge conveying pipeline, and the sludge pump is connected with the slurry discharge pipe of the thermal grinding chamber through the sludge conveying pipeline.

[0011] Further, the sludge conveying device comprises a sludge pump and a sludge conveying pipeline, and the sludge pump is connected with the slurry discharge pipe of the thermal grinding chamber through the sludge conveying pipeline.

[0012] Further, a granulator is installed downstream of the receiving conveyor.

[0013] To achieve the above object, the present application further provides the following technical scheme: a sludge treatment process, comprising the following steps:

[0014] S1, wood chips are conveyed into the thermal grinder 3 through the wood chip conveyor 4, and the wood chips become fiber slurry by being sequentially subjected to the cooking chamber 31 having a cooking effect and the thermal grinding chamber 32 having a thermal grinding effect in the thermal grinder 3;

[0015] S2, the sludge is mixed with the fiber slurry, and the high temperature environment generated by the thermal grinder 3 destroys the floc structure and sludge cell structure of the sludge, the sludge cells are broken and release intracellular substances into the fiber slurry, and the extracellular polymers of the sludge microorganisms are also broken and dissolved;

[0016] S3, the mixed slurry of the fiber slurry and the sludge is discharged into the drying pipeline, hot air is blown into the drying pipeline under the action of the fan, and the mixed slurry is transported and dried; the mixed slurry at the outlet of the drying pipeline is dried into fiber biomass material, which is then separated from the hot air under the action of the cyclone separator and falls onto the downstream material receiving conveyor;

[0017] S4, according to the different composition of the sludge used, the fiber biomass material produced is also different, after inspection, if the fiber biomass material has high nutritional composition, a packing machine can be installed downstream of the material receiving conveyor to pack and sell the organic fertilizer raw material for breeding and soil improvement; if the biomass material has low nutritional composition, a granulator can be installed downstream of the material receiving conveyor to press the fiber biomass material into biomass particles for fuel use or deep processing for use in the landscaping and building material industries.

[0018] Further, the sludge in S2 can be transported into the slurry discharge pipe by the sludge pump 1, so that the floc structure and sludge cell structure of the sludge are destroyed in the slurry discharge pipe, the sludge cells are broken and release intracellular substances into the slurry discharge pipe to mix with the fiber slurry; the sludge in S2 can also be transported into the cooking chamber 31 by the sludge pump 1 or by the wood chip conveyor 4, so that the sludge sequentially passes through the cooking chamber 31 with cooking function and the thermal grinding chamber 32 with thermal grinding function in the thermal grinder 3, and in the high temperature environment of cooking and thermal grinding, the floc structure of the sludge is destroyed, and the cell wall of the sludge cell is also destroyed, resulting in the breaking of the sludge cells and the release of intracellular substances into the thermal grinder 3 to mix with the fiber slurry.

[0019] Further, the mass ratio of the wood chips and the sludge is 1:5 to 2:5, and the moisture content of the sludge is 75% to 85%; the moisture content of the fiber biomass material is 10% to 40%, and the dry mass ratio of wood fiber to sludge in the fiber biomass material is maintained at 1:2 to 1:1.

[0020] Further, the temperature in the thermal grinder is between 160°C and 180°C, and the temperature in the slurry discharge pipe is also between 160°C and 180°C.

[0021] Further, the temperature of the hot air outlet of the fan is between 120°C and 160°C, and the air speed of the fan is between 25m / s and 30m / s.

[0022] Compared with the prior art, the sludge treatment system and process has the advantages that wood chips are cooked, hot-milled, mixed with sludge and dried into fibrous biomass material by using the hot-milling process of the hot-milling machine and the hot-air drying process of the drying pipeline, the system requires less equipment, the technology is mature, the structure is simple, various reaction auxiliaries are not needed, the maintenance cost is low, various types of sludge including industrial sludge and municipal sludge can be treated, various fibrous biomass materials produced according to the above types of sludge can be applied to different industries such as fuel supply, organic fertilizer raw material, breeding, soil improvement, landscaping, building material and the like, and the product after sewage treatment has a wide range of applications. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a top view of the first embodiment of the present application;

[0024] Figure 2 is a schematic view of the connection between the wood chip conveyor and the feeding conveyor of the present application;

[0025] Figure 3 is a schematic view of the structure of the cyclone separator of the present application;

[0026] Figure 4 is a top view of the second embodiment of the present application.

[0027] In the drawings: 1 sludge pump, 2 feeding conveyor, 3 hot-milling machine, 31 cooking chamber, 32 hot-milling chamber, 4 wood chip conveyor, 5 drying pipeline, 6 fan, 61 hot-air outlet, 7 cyclone separator, 8 material receiving conveyor, 9 granulator. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application. Embodiment one

[0029] Please refer to Figures 1-3The application provides a technical scheme: a sludge treatment system, which comprises a feeding conveyor 2, a thermal grinder 3, a wood chip conveyor 4, a drying pipeline 5 and a cyclone separator 7, the thermal grinder 3 comprises a cooking chamber 31 and a thermal grinding chamber 32, and the thermal grinding chamber 32 is arranged downstream of the cooking chamber 31; the wood chip conveyor 4 is installed at the upper portion of the cooking chamber 31, the downstream end of the feeding conveyor 2 is located on the feeding port of the wood chip conveyor 4, the thermal grinding chamber 32 is connected with the upstream end of the drying pipeline 5 through a slurry discharge pipe, and a sludge conveying device is connected to the slurry discharge pipe; the sludge conveying device comprises a sludge pump 1 and a sludge conveying pipeline, the sludge pump 1 is connected with the slurry discharge pipe of the thermal grinding chamber 32 through the sludge conveying pipeline; the sludge pump 1 is a screw pump, and a feeding hopper is arranged at the feeding port of the screw pump; the upstream end of the drying pipeline 5 is provided with a fan 6, the inlet of the fan 6 is a hot air port 61, the downstream end of the drying pipeline 5 is connected with the cyclone separator 7, the length of the drying pipeline 5 is at least 100 m, a discharger is arranged at the bottom of the cyclone separator 7, and a receiving conveyor 8 is arranged below the cyclone separator 7.

[0030] The wood chips are conveyed into the wood chip conveyor 4 by the feeding conveyor 2, and then conveyed into the thermal grinder 3 by the wood chip conveyor 4, and then sequentially pass through the cooking chamber 31 with a cooking function and the thermal grinding chamber 32 with a thermal grinding function in the thermal grinder 3 to become fiber slurry, and then the fiber slurry is discharged to the drying pipeline 5 through the slurry discharge pipe; while the fiber slurry is discharged to the drying pipeline 5, the sludge is conveyed into the slurry discharge pipe by the sludge pump 1, the floc structure and the sludge cell structure of the sludge are destroyed under the high temperature, the sludge cells are broken and the intracellular substances are released into the slurry discharge pipe to mix with the fiber slurry, and the extracellular polymers of the sludge microorganisms are also broken and dissolved in the slurry discharge pipe; the mixed slurry of the fiber slurry and the sludge is discharged to the drying pipeline 5 through the slurry discharge pipe, and the high-temperature hot air is blown into the drying pipeline 5 under the action of the fan 6, and the mixed slurry is conveyed and dried; the mixed slurry at the outlet of the drying pipeline 5 is dried into fiber biomass material, and then the fiber biomass material is separated from the hot air under the action of the cyclone separator 7 and then falls into the receiving conveyor 8 below; according to the different sludge components, the produced fiber biomass material is also different, if the fiber biomass material has high nutritional components after inspection, a packing machine can be installed downstream of the receiving conveyor 8 to pack and sell the organic fertilizer raw material, breeding and soil improvement; if the biomass material has low nutritional components, a granulator 9 can be installed downstream of the receiving conveyor 8 to press the fiber biomass material into biomass particles as fuel or to be deeply processed for the garden greening and building material industry.

[0031] The sludge treatment system disclosed in the embodiment utilizes the hot grinding processing of the hot grinder 3 and the hot air drying processing of the drying pipeline 5, so that the wood chips are boiled and hot ground, then mixed with the sludge and dried into fiber biomass material, the sludge treatment capacity is high, and the sludge treatment efficiency is high. The whole system requires less equipment, the technology is mature, various reaction accessories do not need to be added, various types of sludge including industrial, urban and the like can be treated, and various fiber biomass materials produced according to the above various types of sludge can be applied to different industries such as fuel supply, organic fertilizer raw material, breeding, soil improvement, landscaping, building materials and the like, and the use range of the products after sewage treatment is wide. Embodiment two

[0032] Please refer to Figures 2-4 The present application provides a technical solution: a sludge treatment system, comprising a hot grinder 3, a wood chip conveyor 4, a drying pipeline 5 and a cyclone separator 7, the hot grinder 3 comprises a cooking chamber 31 and a hot grinding chamber 32, and the hot grinding chamber 32 is arranged downstream of the cooking chamber 31; the upstream of the hot grinder 3 is connected with a sludge conveying device, the sludge conveying device comprises a sludge pump 1 and a sludge conveying pipeline, the sludge pump 1 is connected with the top of the cooking chamber 31 through the sludge conveying pipeline; the sludge pump 1 is a screw pump, and a discharge hopper is arranged at the feeding port of the screw pump; the wood chip conveyor 4 is installed at the upper part of the cooking chamber 31, the downstream end of the wood chip conveyor 4 is located on the feeding port of the wood chip conveyor 4, the hot grinding chamber 32 is connected with the upstream end of the drying pipeline 5 through a slurry discharge pipeline; the upstream end of the drying pipeline 5 is provided with a fan 6, and the inlet of the fan 6 is a hot air inlet 61, the downstream end of the drying pipeline 5 is connected with the cyclone separator 7, the length of the drying pipeline 5 is at least 100 meters, a discharger is arranged at the bottom of the cyclone separator 7, and a receiving conveyor 8 is arranged below the cyclone separator 7.

[0033] For sludge with high water content, the sludge is conveyed into the cooking chamber 31 by the sludge pump 1, and the wood chips are conveyed into the cooking chamber 31 by the wood chip conveyor 4 alone; for sludge with low water content, the sludge is conveyed into the cooking chamber 31 together with the wood chips by the wood chip conveyor 4 through the wood chip conveyor 4;

[0034] The wood chips and sludge are sequentially sent into the cooking chamber 31 and the thermal grinding chamber 32 of the thermal grinder 3, and the sludge in the thermal grinder 3 is in a high-temperature environment of cooking and thermal grinding, so that the floc structure of the sludge is destroyed, the cell wall of the sludge cell is also destroyed, the sludge cell is broken, and the intracellular substances are released into the thermal grinder 3 to be mixed with the fiber slurry, and the extracellular polymers of the sludge microorganism are also broken and dissolved in the cooking and thermal grinding process without adding any auxiliary materials, and the wood chips in the thermal grinder 3 become fiber slurry through cooking and thermal grinding, and the fiber slurry is mixed with the sludge to form mixed slurry, which is discharged into the drying pipeline 5 through the slurry discharge pipe, and the high-temperature hot air is blown into the drying pipeline 5 under the action of the fan 6, and the mixed slurry is transported and dried; the mixed slurry at the outlet of the drying pipeline 5 is dried into fiber biomass material, which is then separated from the hot air under the action of the cyclone separator 7 and falls onto the receiving conveyor 8 below; according to the different sludge components, the produced fiber biomass material is also different, and if the fiber biomass material has high nutritional components after testing, a packing machine can be installed downstream of the receiving conveyor 8 to pack and sell the organic fertilizer raw material, breeding, and soil improvement; if the biomass material has low nutritional components, a granulator 9 can be installed downstream of the receiving conveyor 8 to press the fiber biomass material into biomass particles as fuel or for deep processing for use in the landscaping and building material industries.

[0035] The sludge treatment system disclosed in the embodiment fully mixes the sludge and wood chips through the thermal grinding process of the thermal grinder 3 and the hot air drying process of the drying pipeline 5, and the sludge and wood chips are cooked, thermally ground, and dried into fiber biomass material, the sludge and wood chips are more fully mixed, and the sludge treatment effect is good. The whole system requires less equipment, the technology is mature, various reaction auxiliary materials are not needed, various types of sludge including industrial and urban sludge can be treated, and various fiber biomass materials produced according to the above-mentioned various types of sludge can be applied to fuel supply, organic fertilizer raw material, breeding, soil improvement, landscaping, building materials, and different industries, and the use range of the products after sewage treatment is wide. Embodiment three

[0036] Please refer to Figures 1-4 The application also provides a technical solution, a sludge treatment process, comprising the following steps:

[0037] S1, the wood chips are transported to the thermal grinder 3 through the wood chip conveyor 4, and the wood chips are sequentially sent into the cooking chamber 31 and the thermal grinding chamber 32 of the thermal grinder 3 to become fiber slurry;

[0038] S2, the sludge is fully mixed with the fiber slurry, and the high-temperature environment of the thermal grinder 3 is used to destroy the floc structure and the sludge cell structure of the sludge, break the sludge cell, and release the intracellular substances into the fiber slurry, and the extracellular polymers of the sludge microorganism are also broken and dissolved;

[0039] S3, the mixed slurry of fiber slurry and sludge is discharged into the drying pipe 5, and the high-temperature hot air is blown into the drying pipe 5 under the action of the fan 6, and the mixed slurry is transported and dried; the mixed slurry at the outlet of the drying pipe 5 is dried into fiber biomass material, which is then separated from the hot air under the action of the cyclone separator 7 and falls onto the material receiving conveyor 8 below;

[0040] S4, according to the different composition of the sludge used, the fiber biomass material produced is also different, after inspection, if the fiber biomass material has high nutritional composition, a packing machine can be installed downstream of the material receiving conveyor 8 to pack and sell organic fertilizer raw materials, breeding, and soil improvement; if the biomass material has low nutritional composition, a granulator 9 can be installed downstream of the material receiving conveyor 8 to press the fiber biomass material into biomass particles for fuel use or deep processing for landscaping and building material industry.

[0041] Further, the sludge in S2 can be transported into the slurry discharge pipe by the sludge pump 1, so that the floc structure and sludge cell structure of the sludge in the slurry discharge pipe are destroyed, and the sludge cells are broken and release intracellular substances into the slurry discharge pipe to mix with the fiber slurry; the sludge in S2 can also be transported into the cooking chamber 31 by the sludge pump 1 or by the wood chip conveyor 4, so that the sludge passes through the cooking chamber 31 with cooking function and the thermal grinding chamber 32 with thermal grinding function in the thermal grinder 3 in sequence, and the floc structure of the sludge in the cooking and thermal grinding high-temperature environment is destroyed, and the cell wall of the sludge cell is also destroyed, resulting in the breaking of the sludge cells and the release of intracellular substances into the thermal grinder 3 to mix with the fiber slurry.

[0042] Further, the mass ratio of wood chips to sludge is 1:5, and the moisture content of the sludge is 75%; the moisture content of the fiber biomass material is 10%, and the absolute dry mass ratio of wood fiber to sludge in the fiber biomass material is maintained at 1:2.

[0043] Further, the temperature in the thermal grinder 3 is 160℃, and the temperature in the slurry discharge pipe is also 160℃.

[0044] Further, the temperature of the hot air outlet 61 of the fan 6 is 120℃, and the air speed of the fan 6 is 25m / s. Example Four

[0045] Please refer to Figures 1-4 The present application also provides a technical solution, a sludge treatment process, comprising the following steps:

[0046] S1, the wood chips are transported to the hot mill 3 by the wood chip conveyor 4, and the wood chips are sequentially subjected to the cooking chamber 31 with cooking effect and the hot mill chamber 32 with hot milling effect in the hot mill 3 to become fiber slurry;

[0047] S2, the sludge is fully mixed with the fiber slurry, and the sludge is destroyed in the high temperature environment generated by the hot mill 3, the sludge cells are broken and the intracellular substances are released and mixed with the fiber slurry, and the extracellular polymers of the sludge microorganisms are also broken and dissolved;

[0048] S3, the mixed slurry of the fiber slurry and the sludge is discharged into the drying pipeline 5 by the slurry discharge pipe, and the high temperature hot air is blown into the drying pipeline 5 under the action of the fan 6, and the mixed slurry is transported and dried; the mixed slurry at the outlet of the drying pipeline 5 is dried into fiber biomass material, which is then separated from the hot air under the action of the cyclone separator 7 and falls onto the receiving conveyor 8 below;

[0049] S4, according to the different composition of the sludge used, the fiber biomass material produced is also different, after inspection, if the fiber biomass material has high nutritional composition, a packing machine can be installed downstream of the receiving conveyor 8 to pack and sell the organic fertilizer raw material, breeding and soil improvement; if the biomass material has low nutritional composition, a granulator 9 can be installed downstream of the receiving conveyor 8 to press the fiber biomass material into biomass particles for fuel use or deep processing for landscaping and building material industry.

[0050] Further, the sludge in S2 can be transported to the slurry discharge pipe by the sludge pump 1, so that the sludge is destroyed in the slurry discharge pipe, the sludge cells are broken and the intracellular substances are released into the slurry discharge pipe and mixed with the fiber slurry; the sludge in S2 can also be transported into the cooking chamber 31 by the sludge pump 1 or by the wood chip conveyor 4, so that the sludge is sequentially subjected to the cooking chamber 31 with cooking effect and the hot mill chamber 32 with hot milling effect in the hot mill 3, and the sludge cells are broken and the intracellular substances are released into the hot mill 3 and mixed with the fiber slurry.

[0051] Further, the mass ratio of the wood chips and the sludge is 1.5:5, and the moisture content of the sludge is 80%; the moisture content of the fiber biomass material is 25%, and the dry mass ratio of the wood fiber to the sludge in the fiber biomass material is maintained at 1:1.5.

[0052] Further, the temperature in the hot mill 3 is 170℃, and the temperature in the slurry discharge pipe is also 170℃.

[0053] Further, the temperature of the hot air outlet 61 of the fan 6 is 140℃, and the air speed of the fan 6 is 27m / s. Example Five

[0054] Please refer to Figures 1-4 The present application also provides a technical solution, a sludge treatment process, comprising the following steps:

[0055] S1, the wood chips are transported to the thermal grinder 3 by the wood chip conveyor 4, and the wood chips are sequentially subjected to the cooking chamber 31 with cooking effect and the thermal grinding chamber 32 with thermal grinding effect in the thermal grinder 3 to become fiber slurry;

[0056] S2, the sludge is fully mixed with the fiber slurry, and the high-temperature environment generated by the thermal grinder 3 destroys the floc structure and the sludge cell structure of the sludge, the sludge cells are broken and release intracellular substances to mix with the fiber slurry, and the extracellular polymers of the sludge microorganisms are also broken and dissolved;

[0057] S3, the mixed slurry of the fiber slurry and the sludge is discharged into the drying pipeline 5 by the slurry discharge pipe, and high-temperature hot air is blown into the drying pipeline 5 under the action of the fan 6, and the mixed slurry is transported and dried; the mixed slurry at the outlet of the drying pipeline 5 is dried into fiber biomass material, which is then separated from the hot air under the action of the cyclone separator 7 and falls onto the receiving conveyor 8 below;

[0058] S4, according to the different components of the sludge used, the fiber biomass material produced is also different, after inspection, if the fiber biomass material has high nutritional components, a packing machine can be installed downstream of the receiving conveyor 8 to pack and sell the organic fertilizer raw material, breeding, and soil improvement; if the biomass material has low nutritional components, a granulator 9 can be installed downstream of the receiving conveyor 8 to press the fiber biomass material into biomass particles for fuel use or deep processing for use in the landscaping and building material industries.

[0059] Further, the sludge in S2 can be transported into the slurry discharge pipe by the sludge pump 1, so that the floc structure and the sludge cell structure of the sludge are destroyed in the slurry discharge pipe, the sludge cells are broken and release intracellular substances into the slurry discharge pipe to mix with the fiber slurry; the sludge in S2 can also be transported into the cooking chamber 31 by the sludge pump 1 or by the wood chip conveyor 4, so that the sludge is sequentially subjected to the cooking chamber 31 with cooking effect and the thermal grinding chamber 32 with thermal grinding effect in the thermal grinder 3, and in the high-temperature cooking and thermal grinding environment, the floc structure of the sludge is destroyed, the cell wall of the sludge cell is also destroyed, resulting in the sludge cells being broken and releasing intracellular substances into the thermal grinder 3 to mix with the fiber slurry.

[0060] Further, the mass ratio of the wood chips and the sludge is 2:5, and the water content of the sludge is 85%; the water content of the fibrous biomass material is 40%, and the dry mass ratio of the wood fiber to the sludge in the fibrous biomass material is kept at 1:1.

[0061] Further, the temperature in the heat mill 3 is 180 DEG C, and the temperature in the slurry discharge pipe is also 180 DEG C.

[0062] Further, the temperature of the hot air outlet 61 of the fan 6 is 160 DEG C, and the air speed of the fan 6 is 30 m / s.

[0063] The sludge treatment system of the present application uses the heat milling process of the heat mill 3 and the hot air drying process of the drying pipe 5 to fully mix and dry the wood chips after steaming and heat milling with the sludge into fibrous biomass material. The whole system requires less equipment, and the technology is mature. No reaction auxiliary materials are needed. Various types of sludge including industrial and urban sludge can be treated. The various fibrous biomass materials produced according to the above-mentioned various types of sludge can be applied to different industries such as fuel supply, organic fertilizer raw material, breeding, soil improvement, landscaping, building materials, etc. The product after sewage treatment has a wide range of uses.

[0064] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A sludge treatment process, which sludge treatment process employs a sludge treatment system comprising a thermal grinder (3), a chip conveyor (4), a drying duct (5) and a cyclone (7), characterised in that: The hot grinder (3) comprises a cooking chamber (31) and a hot grinding chamber (32), and the hot grinding chamber (32) is arranged downstream of the cooking chamber (31); the wood chip conveyor (4) is arranged on the upper portion of the cooking chamber (31), the hot grinding chamber (32) is connected with the upstream end of the drying pipeline (5) through a slurry discharge pipe, and the slurry discharge pipe is further provided with a sludge conveying device; the upstream end of the drying pipeline (5) is provided with a fan (6), the inlet of the fan (6) is a hot air outlet (61), the downstream end of the drying pipeline (5) is connected with a cyclone separator (7), and the lower portion of the cyclone separator (7) is provided with a receiving conveyor (8); The sludge treatment process comprises the following steps: S1, wood chips are conveyed to the hot grinder (3) through the wood chip conveyor (4), and the wood chips are sequentially subjected to the cooking chamber (31) with a cooking function and the hot grinding chamber (32) with a hot grinding function in the hot grinder (3) to become fiber slurry; S2, the sludge is fully mixed with the fiber slurry, and the high-temperature environment generated by the hot grinder (3) can destroy the floc structure and sludge cell structure of the sludge, the sludge cells are broken and the intracellular substances are released and mixed with the fiber slurry, and the extracellular polymers of the sludge microorganisms are also broken and dissolved; S3, the mixed slurry of the fiber slurry and the sludge is discharged into the drying pipeline (5) through the slurry discharge pipe, high-temperature hot air is blown into the drying pipeline (5) under the action of the fan (6), and the mixed slurry is conveyed and dried; the mixed slurry at the outlet of the drying pipeline (5) is dried into fiber biomass material, and then the fiber biomass material is separated from the hot air under the action of the cyclone separator (7) and falls into the receiving conveyor (8) below; S4, according to the different components of the sludge used, the fiber biomass material produced is also different, and after inspection, if the fiber biomass material has high nutritional components, a packing machine can be arranged downstream of the receiving conveyor (8) to pack and sell the organic fertilizer raw material, breeding and soil improvement; if the biomass material has low nutritional components, a granulator (9) can be arranged downstream of the receiving conveyor (8) to press the fiber biomass material into biomass particles as fuel or to be deeply processed for use in the garden greening and building material industries.

2. A sludge treatment process according to claim 1, characterised in that: The sludge conveying device comprises a sludge pump (1) and a sludge conveying pipeline, and the sludge pump (1) is connected with the slurry discharge pipe of the hot grinding chamber (32) through the sludge conveying pipeline.

3. A sludge treatment process according to claim 2, characterised in that: The sludge in S2 is conveyed into the slurry discharge pipe by the sludge pump (1), the slurry discharge pipe is connected with the hot grinder (3) and also forms a high-temperature environment, the floc structure and sludge cell structure of the sludge in the slurry discharge pipe are destroyed, and the sludge cells are broken and release intracellular substances into the slurry discharge pipe to mix with the fiber slurry.

4. A sludge treatment process, which sludge treatment process employs a sludge treatment system comprising a thermal grinder (3), a chip conveyor (4), a drying duct (5) and a cyclone (7), characterised in that: The heat grinder (3) comprises a cooking chamber (31) and a heat grinding chamber (32), and the heat grinding chamber (32) is arranged downstream of the cooking chamber (31); the upstream of the heat grinder (3) is connected with a sludge conveying device; the wood chip conveyor (4) is installed at the upper portion of the cooking chamber (31), the heat grinding chamber (32) is connected with the upstream end of the drying pipeline (5) through a slurry discharge pipe; the upstream end of the drying pipeline (5) is provided with a fan (6), the inlet of the fan (6) is a hot air outlet (61), the downstream end of the drying pipeline (5) is connected with a cyclone separator (7), and a receiving conveyor (8) is arranged below the cyclone separator (7); The sludge treatment process comprises the following steps: S1, wood chips are conveyed to the heat grinder (3) by the wood chip conveyor (4), and the wood chips are sequentially subjected to the cooking chamber (31) with a cooking function and the heat grinding chamber (32) with a heat grinding function in the heat grinder (3) to become fiber slurry; S2, the sludge is fully mixed with the fiber slurry, and the sludge is subjected to a high-temperature environment generated by the heat grinder (3) so that the floc structure and the sludge cell structure are both destroyed, the sludge cells are broken and the intracellular substances are released and mixed with the fiber slurry, and the extracellular polymers of the sludge microorganisms are also broken and dissolved; S3, the mixed slurry of the fiber slurry and the sludge is discharged into the drying pipeline (5) through a slurry discharge pipe, high-temperature hot air is blown into the drying pipeline (5) under the action of the fan (6), and the mixed slurry is conveyed and dried; the mixed slurry at the outlet of the drying pipeline (5) is dried into fiber biomass material, which is then separated from the hot air under the action of the cyclone separator (7) and falls into the receiving conveyor (8) below; S4, according to different sludge components, the produced fiber biomass material is also different, if the fiber biomass material has high nutritional components after inspection, a packing machine can be installed downstream of the receiving conveyor (8) to pack and sell the organic fertilizer raw material, breeding and soil improvement; if the biomass material has low nutritional components, a granulator (9) can be installed downstream of the receiving conveyor (8) to press the fiber biomass material into biomass particles as fuel or to be deeply processed for the landscaping and building material industry.

5. A sludge treatment process according to claim 4, characterised in that: The sludge conveying device comprises a sludge pump (1) and a sludge conveying pipeline, and the sludge pump (1) is connected with the top of the cooking chamber (31) through the sludge conveying pipeline.

6. A sludge treatment process according to claim 5, characterised in that: In S2, the sludge is conveyed into the cooking chamber (31) by the sludge pump (1) or the wood chip conveyor (4), so that the sludge is sequentially subjected to the cooking chamber (31) with a cooking function and the heat grinding chamber (32) with a heat grinding function in the heat grinder (3), and the floc structure of the sludge is destroyed in the high-temperature cooking and heat grinding environment, the cell wall of the sludge cell is also destroyed, so that the sludge cells are broken and the intracellular substances are released into the heat grinder (3) and mixed with the fiber slurry.

7. A sludge treatment process according to claim 1 or 4, characterised in that: A granulator (9) is installed downstream of the receiving conveyor (8).

8. A sludge treatment process according to claim 1 or 4, characterised in that: The mass ratio of the wood chips and sludge is 1:5-2:5, and the water content of the sludge is 75%-85%; the water content of the fibrous biomass material is 10%-40%, and the dry mass ratio of the wood fiber to the sludge in the fibrous biomass material is kept between 1:2 and 1:

1.

9. A sludge treatment process according to claim 1 or 4, characterised in that: The temperature in the thermal grinder (3) is between 160-180℃, and the temperature in the slurry discharge pipe is also between 160-180℃; the temperature of the hot air outlet (61) of the fan (6) is between 120-160℃, and the air speed of the fan (6) is between 25-30m / s.

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