阅读说明：本技术 一种垃圾焚烧发电厂污泥燃烧系统 (Sludge combustion system of waste incineration power plant ) 是由 张凯 胡龙 王章生 于 2019-10-12 设计创作，主要内容包括：本申请公开了一种垃圾焚烧发电厂污泥燃烧系统,包括干燥燃烧装置,干燥燃烧装置内自上而下设有一级燃烧室和二级燃烧室,一级燃烧室用于污泥的干燥和初步燃烧,二级燃烧室用于初步燃烧后的污泥的完全燃烧,一级燃烧室与二级燃烧室连通,二级燃烧室内的烟气能够到达一级燃烧室内。利用二级燃烧室产生的高温烟气干燥一级燃烧室内的污泥,充分利用了热量资源,节能环保。二级燃烧室在完全燃烧时产生的高温烟气上升至一级燃烧室内,湿污泥进入一级燃烧室内后,在高温烟气的作用下加热干燥,同时,一级燃烧室内部分已干燥的污泥发生初步燃烧,可以加快湿污泥的干燥；初步燃烧的污泥在二级燃烧室内完全燃烧,燃烧更充分,可以减少有害气体的生成。(The application discloses waste incineration power plant sludge combustion system, including dry burner, top-down is equipped with one-level combustion chamber and second grade combustion chamber in the dry burner, and the one-level combustion chamber is used for the drying and the preliminary combustion of mud, and the second grade combustion chamber is used for the complete combustion of the mud after the preliminary combustion, and one-level combustion chamber and second grade combustion chamber intercommunication, flue gas in the second grade combustion chamber can reach in the one-level combustion chamber. The high-temperature flue gas generated by the secondary combustion chamber is used for drying the sludge in the primary combustion chamber, so that heat resources are fully utilized, and the energy-saving and environment-friendly effects are achieved. High-temperature flue gas generated by the secondary combustion chamber during complete combustion rises into the primary combustion chamber, wet sludge is heated and dried under the action of the high-temperature flue gas after entering the primary combustion chamber, and meanwhile, part of dried sludge in the primary combustion chamber is subjected to primary combustion, so that the drying of the wet sludge can be accelerated; the sludge in the primary combustion is completely combusted in the secondary combustion chamber, so that the combustion is more sufficient, and the generation of harmful gas can be reduced.)

1. The utility model provides a waste incineration power plant sludge combustion system, a serial communication port, including dry burner, top-down is equipped with one-level combustion chamber and second grade combustion chamber in the dry burner, the one-level combustion chamber is used for the drying and the preliminary combustion of mud, the second grade combustion chamber is used for the complete combustion of the mud after the preliminary combustion, the one-level combustion chamber with second grade combustion chamber intercommunication, flue gas in the second grade combustion chamber can reach in the one-level combustion chamber.

2. The sludge combustion system of a refuse incineration power plant according to claim 1, wherein the drying combustion device comprises a main body, a first partition plate and a second partition plate, the first partition plate and the second partition plate are distributed in the main body from top to bottom, the main body is divided into a primary combustion chamber, a secondary combustion chamber and a waste residue pool, and the secondary combustion chamber is communicated with the waste residue pool; be equipped with pan feeding mouth, exhaust port and row's cinder notch in the main part, the pan feeding mouth with the exhaust port all is located the one-level combustion chamber department of main part, it is located to arrange the cinder notch the waste slag pond department of main part.

3. The sludge combustion system of a refuse incineration power plant according to claim 2, wherein the first partition plate and the second partition plate are arranged in the main body in a staggered, inclined and downward manner, the highest end of the first partition plate and the highest end of the second partition plate are both fixedly connected with the inner wall of the main body, a gap for sludge to pass through is arranged between the lowest end of the first partition plate and the main body, and a through hole for sludge to pass through is arranged on the second partition plate; the feeding port is located at the highest end of the first partition plate.

4. The sludge combustion system of the waste incineration power plant as recited in claim 1, further comprising a feeding device, a flue gas treatment device and a smoke exhaust device, wherein the feeding device, the dry combustion device, the flue gas treatment device and the smoke exhaust device are connected in sequence, the feeding device is used for feeding sludge to the dry combustion device, the flue gas treatment device is used for treating flue gas generated by the dry combustion device burning sludge, and the smoke exhaust device is used for exhausting flue gas treated by the flue gas treatment device.

5. The sludge combustion system of a refuse incineration power plant according to claim 4, further comprising a waste heat recovery device, wherein the waste heat recovery device is arranged between the dry combustion device and the flue gas treatment device; the waste heat recovery device is a surface heat exchanger.

6. The waste incineration power plant sludge combustion system of claim 4, further comprising a condensed water recovery device disposed between the flue gas treatment device and the smoke exhaust device.

7. The sludge combustion system of a refuse incineration power plant according to claim 4, wherein the feeding device comprises an storage tank, an extrusion mechanism, a filtering mechanism and a control valve, the upper side of the storage tank is provided with a feeding hole, and the extrusion mechanism is partially movably arranged in the storage tank to extrude the material in the storage tank; the side wall of the storage vat is of a double-layer jacket structure, the side wall of the storage vat is sequentially provided with a first jacket and a second jacket from outside to inside, the water outlet is positioned on the first jacket, the second jacket comprises a first fixing net, a second fixing net and a filter screen, the filter screen is arranged between the first fixing net and the second fixing net to form the filtering mechanism, the filtering mechanism is used for filtering and dewatering materials in the storage vat, and water obtained by filtering is discharged through the water outlet; the lower side of the storage cylinder is provided with a discharge hole, and the control valve is arranged at the discharge hole and used for opening or closing the discharge hole.

8. The sludge combustion system of a refuse incineration power plant according to claim 4, wherein a plurality of fans for discharging the smoke are provided in the smoke discharging device.

9. The sludge combustion system of a refuse incineration power plant according to claim 4, wherein the flue gas treatment device comprises a dioxin treatment unit and a dust removal unit which are connected in sequence, and the dioxin treatment unit is arranged near the dry combustion device and used for removing dioxin in flue gas; the dust removal unit is arranged close to the smoke exhaust device and used for removing dust in smoke.

10. The waste incineration power plant sludge combustion system of claim 9, further comprising a dust recycling unit connecting the dry combustion device and the dust removal unit for feeding the dust collected by the dust removal unit into the dry combustion device.

Technical Field

The invention relates to the technical field of sludge treatment, in particular to a sludge combustion system of a waste incineration power plant.

Background

With the development of industrialization and the acceleration of urbanization in China, a large amount of industrial waste and domestic waste are generated, a sewage treatment plant and a garbage disposal plant can generate a large amount of sludge when processing the waste, the sludge has high water content, contains a large amount of pathogenic bacteria, parasitic ova, chromium, mercury and other heavy metal toxic and harmful substances, is a pollutant with complex property, high pollutant content and huge potential environmental risk, and the sludge treatment problem becomes a great environmental protection problem which needs to be solved urgently in the current society.

At present, the treatment process of sludge mainly comprises anaerobic fermentation, aerobic fermentation, burying treatment, composting treatment or combustion treatment, wherein the treatment process and effect of the anaerobic fermentation are greatly influenced by the change of sludge components, and the treatment efficiency is low; the aerobic digestion sludge treatment mode has high energy consumption, large basic investment and great influence by the change of the components of the sludge; secondary pollution can be caused by burying treatment and composting treatment, a large amount of land is occupied, and the treatment requirement cannot be met; the combustion treatment has the advantages of volume reduction, high weight reduction rate, high treatment speed, thorough harmlessness, energy recycling and the like, is one of effective and practical technologies for treating sludge, but polluted flue gas can be generated in the combustion process, and the combustion treatment of sludge and the retreatment of the flue gas can possibly become the main technical direction of sludge treatment in the future. Because the water content of the sludge is higher and can reach more than 75 percent, the sludge cannot be directly combusted, and therefore drying treatment is usually needed before the sludge is combusted, but the existing drying workshop and a combustion system are relatively independent, the equipment system is large, the system is complex, and the operation and maintenance cost is high.

Disclosure of Invention

Aiming at the problems, the invention provides a sludge combustion system of a waste incineration power plant, which integrates sludge drying and combustion, and has the advantages of reasonable design, compact structure, energy conservation, environmental protection, simple operation and convenience for later operation and maintenance.

The technical scheme adopted by the invention is as follows: the invention provides a sludge combustion system of a waste incineration power plant, which comprises a drying combustion device, wherein a primary combustion chamber and a secondary combustion chamber are arranged in the drying combustion device from top to bottom, the primary combustion chamber is used for drying and primary combustion of sludge, the secondary combustion chamber is used for complete combustion of the sludge after the primary combustion, the primary combustion chamber is communicated with the secondary combustion chamber, and flue gas in the secondary combustion chamber can reach the primary combustion chamber.

In an embodiment of the present invention, the drying combustion device includes a main body, a first partition plate and a second partition plate, the first partition plate and the second partition plate are distributed from top to bottom in the main body, the main body is divided into a primary combustion chamber, a secondary combustion chamber and a waste residue pool, and the secondary combustion chamber is communicated with the waste residue pool; be equipped with pan feeding mouth, exhaust port and row's cinder notch in the main part, the pan feeding mouth with the exhaust port all is located the one-level combustion chamber department of main part, it is located to arrange the cinder notch the waste slag pond department of main part.

In an embodiment of the present invention, the first partition plate and the second partition plate are disposed in the main body in a staggered, inclined and downward manner, the highest end of the first partition plate and the highest end of the second partition plate are both fixedly connected to the inner wall of the main body, a gap for passing sludge is disposed between the lowest end of the first partition plate and the main body, and a through hole for passing sludge is disposed on the second partition plate; the feeding port is located at the highest end of the first partition plate.

In an embodiment of the present invention, the sludge combustion system of the waste incineration power plant further includes a feeding device, a flue gas treatment device, and a smoke exhaust device, the feeding device, the dry combustion device, the flue gas treatment device, and the smoke exhaust device are sequentially connected, the feeding device is configured to supply sludge to the dry combustion device, the flue gas treatment device is configured to treat flue gas generated by the dry combustion device burning sludge, and the smoke exhaust device is configured to exhaust flue gas treated by the flue gas treatment device; the feeding device is connected with the drying combustion device through a conveying belt.

In an embodiment of the present invention, the sludge combustion system of the waste incineration power plant further includes a waste heat recovery device, and the waste heat recovery device is disposed between the dry combustion device and the flue gas treatment device; the waste heat recovery device is a surface heat exchanger.

In an embodiment of the invention, the sludge combustion system of the waste incineration power plant further includes a condensed water recovery device, and the condensed water recovery device is disposed between the flue gas treatment device and the smoke exhaust device.

In an embodiment of the present invention, the feeding device includes a storage tank, an extruding mechanism, a filtering mechanism and a control valve, wherein a feeding port is disposed at an upper side of the storage tank, and the extruding mechanism is partially movably disposed in the storage tank to extrude the material in the storage tank; the side wall of the storage vat is of a double-layer jacket structure, the side wall of the storage vat is sequentially provided with a first jacket and a second jacket from outside to inside, the water outlet is positioned on the first jacket, the second jacket comprises a first fixing net, a second fixing net and a filter screen, the filter screen is arranged between the first fixing net and the second fixing net to form the filtering mechanism, the filtering mechanism is used for filtering and dewatering materials in the storage vat, and water obtained by filtering is discharged through the water outlet; the lower side of the storage cylinder is provided with a discharge hole, and the control valve is arranged at the discharge hole and used for opening or closing the discharge hole.

In an embodiment of the present invention, the smoke exhaust device is provided with a plurality of fans for exhausting smoke.

In an embodiment of the invention, the flue gas treatment device comprises a dioxin treatment unit and a dust removal unit which are sequentially connected, wherein the dioxin treatment unit is arranged close to the dry combustion device and is used for removing dioxin in flue gas; the dust removal unit is arranged close to the smoke exhaust device and used for removing dust in smoke.

In an embodiment of the present invention, the sludge combustion system of the waste incineration power plant further includes a dust recycling unit, and the dust recycling unit is connected to the drying combustion device and the dust removal unit, and is configured to send the dust collected by the dust removal unit to the drying combustion device.

The invention has the beneficial effects that: the sludge combustion system of the waste incineration power plant comprises the drying combustion device, wherein the drying combustion device is internally provided with the primary combustion chamber and the secondary combustion chamber from top to bottom, the drying combustion device is reasonable in design and compact in structure, the later operation and maintenance are facilitated, the sludge in the primary combustion chamber is dried by using high-temperature flue gas generated by the secondary combustion chamber, heat resources are fully utilized, and the energy conservation and environmental protection are realized. When the device is used, high-temperature flue gas generated by the secondary combustion chamber during complete combustion rises into the primary combustion chamber, wet sludge with larger water content enters the primary combustion chamber and is heated and dried under the action of the high-temperature flue gas, and meanwhile, part of dried sludge in the primary combustion chamber is primarily combusted, so that the drying of the wet sludge can be further accelerated; the sludge after the primary combustion is completely combusted in the secondary combustion chamber, so that the combustion is more sufficient, and the generation of harmful gas can be reduced.

Drawings

FIG. 1 is a schematic structural view of a sludge combustion system of a refuse-burning power plant according to the present invention;

FIG. 2 is a schematic view of the feed device of the present invention;

FIG. 3 is a cross-sectional view of the accumulator of the present invention.

The figures are numbered: 1. a feeding device; 2. a drying combustion device; 3. a flue gas treatment device; 4. a fume extractor; 5. a waste heat recovery device; 6. a condensed water recovery device; 7. a dust recycling unit; 21. a primary combustion chamber; 22. a secondary combustion chamber; 23. a waste slag tank; 24. a main body; 25. a first separator; 26. a second separator; 31. a dioxin processing unit; 32. a dust removal unit; 241. a feeding port; 242. a smoke outlet; 243. a slag discharge port; 11. a storage tank; 12. an extrusion mechanism; 13. a filtering mechanism; 14. a control valve; 15. a flushing mechanism; 16. a water collecting mechanism; 17. a mesh screen; 111. a feed inlet; 112. a water outlet; 113. a discharge port; 114. a first jacket; 121. a controller; 122. a connecting member; 123. an extrusion; 131. a second jacket; 132. and (4) a filter screen.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown.

referring to fig. 1, the present invention provides a sludge combustion system of a waste incineration power plant, which includes a drying combustion device 2, a primary combustion chamber 21 and a secondary combustion chamber 22 are arranged in the drying combustion device 2 from top to bottom, the primary combustion chamber 21 is used for drying and primarily combusting sludge, the secondary combustion chamber 22 is used for completely combusting sludge after primarily combusting, the primary combustion chamber 21 is communicated with the secondary combustion chamber 22, and flue gas in the secondary combustion chamber 22 can reach the primary combustion chamber 21. The primary combustion chamber 21 and the secondary combustion chamber 22 in the drying combustion device 2 are arranged from top to bottom, the design is reasonable, the structure is compact, the later-stage operation and maintenance are facilitated, the high-temperature flue gas generated by the secondary combustion chamber 22 is used for drying the sludge in the primary combustion chamber 21, the heat resources are fully utilized, and the energy conservation and environmental protection are realized. When the device is used, high-temperature flue gas generated by the secondary combustion chamber 22 during complete combustion rises into the primary combustion chamber 21, wet sludge with large water content enters the primary combustion chamber 21 and then is heated and dried under the action of the high-temperature flue gas, and meanwhile, part of dried sludge in the primary combustion chamber 21 is subjected to primary combustion, so that the drying of the wet sludge can be further accelerated; the sludge after the primary combustion is completely combusted in the secondary combustion chamber 22, so that the combustion is more sufficient, and the generation of harmful gas can be reduced.

The drying combustion device 2 comprises a main body 24, a first partition plate 25 and a second partition plate 26, wherein the first partition plate 25 and the second partition plate 26 are distributed in the main body 24 from top to bottom to divide the main body 24 into a primary combustion chamber 21, a secondary combustion chamber 22 and a waste residue pool 23, the primary combustion chamber 21 is communicated with the secondary combustion chamber 22, and the secondary combustion chamber 22 is communicated with the waste residue pool 23; the main body 24 is provided with a feeding port 241, a smoke outlet 242 and a slag discharging port 243, the feeding port 241 and the smoke outlet 242 are both positioned at the first-stage combustion chamber 21 of the main body 24, and the slag discharging port 243 is positioned at the waste slag pool 23 of the main body 24. Wet mud gets into one-level combustion chamber 21 from pan feeding mouth 241 in, the high temperature flue gas that produces when the complete combustion takes place for mud in the second grade combustion chamber 22 rises for the mud drying and the preliminary combustion in the one-level combustion chamber 21, and through exhaust port 242 discharge dry combustion device 2, the mud after the drying falls into the second grade combustion chamber 22 in the one-level combustion chamber 21, the waste residue that produces after the mud complete combustion in the second grade combustion chamber 22 falls into in waste slag pool 23, the waste residue is discharged through exhaust port 243.

Can be provided with the clearance between first baffle 25 and the main part 24, perhaps be provided with the gas passing hole that supplies the flue gas to pass through on first baffle 25 for one-level combustion chamber 21 and second grade combustion chamber 22 intercommunication, and then make the flue gas in the second grade combustion chamber 22 can reach in one-level combustion chamber 21, and the flue gas does not have heat loss, make full use of the heat of the flue gas that second grade combustion chamber 22 produced. However, the main body 24 may be provided with a duct for passing the flue gas, which connects the primary combustion chamber 21 and the secondary combustion chamber 22, and the flue gas in the secondary combustion chamber 22 may be allowed to reach the first combustion chamber.

The first partition plate 25 and the second partition plate 26 are arranged in the main body 24 in a staggered, inclined and downward mode, the highest end of the first partition plate 25 and the highest end of the second partition plate 26 are both fixedly connected with the inner wall of the main body 24, a gap for sludge to pass through is formed between the lowest end of the first partition plate 25 and the main body 24, and a through hole for sludge to pass through is formed in the second partition plate 26; the feeding port 241 is located at the highest end of the first partition 25. The first partition plate 25 and the second partition plate 26 are obliquely arranged, so that the sludge in the primary combustion chamber 21 can be driven to automatically fall into the secondary combustion chamber 22, and the sludge in the secondary combustion chamber 22 can be driven to automatically fall into the waste residue pool 23. The inclination angle of the first partition plate 25 and the second partition plate 26, the clearance distance between the lowermost end of the first partition plate 25 and the main body 24, and the clearance distance between the lowermost end of the second partition plate 26 and the main body 24 are set according to actual conditions.

Waste incineration power plant sludge combustion system still includes feeder 1, flue gas processing apparatus 3 and fume extractor 4, and feeder 1, dry burner 2, flue gas processing apparatus 3 and fume extractor 4 connect gradually, and feeder 1 is used for supplying with mud to dry burner 2, and flue gas processing apparatus 3 is used for handling the flue gas that dry burner 2 burns mud and produces, and fume extractor 4 is used for discharging the flue gas after 3 handles of flue gas processing apparatus. In feeder 1 carried wet mud to dry burner 2, wet mud carries out drying and preliminary burning in dry burner 2's one-level combustion chamber 21, then carries out complete combustion in getting into dry burner 2's second grade combustion chamber 22, and the waste residue that the burning produced gets into waste residue pond 23 and discharges, and the flue gas that the burning produced gets into flue gas processing apparatus 3 through exhaust port 242 and carries out flue gas innocent treatment, discharges through fume extractor 4 at last. The utility model provides a sludge combustion apparatus can enough carry out the burning of mud and handle, can administer comparatively environmental protection to the flue gas again. The feeding device 1 is connected with the drying combustion device 2 through a conveyor belt, and the sludge conveying mode is simple. The drying and burning device 2 is also provided with an ignition source, a fan device, a boiling burning device and other devices which are needed for assisting in completing the drying and burning of the sludge.

Waste incineration power plant sludge combustion system still includes waste heat recovery device 5, and waste heat recovery device 5 locates between dry burner 2 and the flue gas processing apparatus 3, and the flue gas temperature after the burning is higher, sets up the waste heat that waste heat recovery device 5 can retrieve the flue gas to be used for heating the required water of production life, air or other fluids, the energy can be saved. The waste heat recovery device 5 is a surface heat exchanger which is arranged on the outer wall of the pipeline connecting the drying and burning device 2 and the flue gas treatment device 3, and flue gas in the pipeline can not pollute heat transfer media in the surface heat exchanger. But not limited thereto, the waste heat recovery device 5 may also be a flue gas heat exchanger, which is widely used for recovering heat of high-temperature or medium-temperature flue gas generated by industrial kilns, boilers, coking furnaces, blast furnaces and metallurgical furnaces, and the invention is not limited thereto.

The sludge combustion system of the waste incineration power plant further comprises a condensed water recovery device 6, and the condensed water recovery device 6 is arranged between the flue gas treatment device 3 and the smoke exhaust device 4. The smoke generated by combustion usually contains a large amount of water vapor, so that the discharged smoke is white (namely white smoke), the white smoke can cause visual pollution and influence the transportation of the flying and the highway, and the water in the smoke cannot be utilized to cause the loss of energy. The condensed water recovery device 6 is arranged to recover water in the flue gas, so that on one hand, the water in the flue gas is condensed, and simultaneously, the flue gas can be preliminarily cooled; on the other hand, the generation of white smoke is reduced, water in the smoke is recycled, water can be provided for other processes, and water resources are fully utilized. The recovered condensed water can be treated and utilized according to the water quality condition.

A plurality of fans for discharging smoke are arranged in the smoke discharging device 4. The treated flue gas reaches the inside of the smoke exhaust device 4, and the fan can exhaust the auxiliary flue gas.

The flue gas treatment device 3 comprises a dioxin treatment unit 31 and a dust removal unit 32 which are connected in sequence, wherein the dioxin treatment unit 31 is arranged close to the dry combustion device 2 and is used for removing dioxin in flue gas. The sludge generated in the sewage treatment plant and the garbage treatment plant can generate toxic dioxin gas during combustion, and the dioxin treatment unit 31 can remove harmful substances such as dioxin in ways of activated carbon adsorption, lime powder adsorption and the like. The dust removal unit 32 is arranged close to the smoke exhaust device 4 and used for removing dust in the smoke so as to achieve the purpose of treating the smoke according to the environmental protection standard. The dust removal unit 32 can adopt dust removal technologies such as electrostatic dust removal and cloth bag dust removal, and has simple process and good dust removal effect.

The sludge combustion system of the waste incineration power plant further comprises a dust recycling unit 7, the dust recycling unit 7 is connected with the drying combustion device 2 and the dust removal unit 32 and used for conveying dust collected by the dust removal unit 32 to the primary combustion chamber 21 of the drying combustion device 2, and the collected dust is easy to burn and is beneficial to drying wet sludge.

Referring to fig. 2 and 3, the feeding device 1 includes an accumulator 11, an extruding mechanism 12, a filtering mechanism 13 and a control valve 14, wherein the upper side of the accumulator 11 is provided with a feeding port 111, and a part of the extruding mechanism 12 is movably disposed in the accumulator 11 to extrude the material in the accumulator 11; the storage vat 11 is provided with a water outlet 112, the filtering mechanism 13 is arranged in the storage vat 11 to filter and remove water from the materials in the storage vat 11, and the water obtained by filtering is discharged through the water outlet 112; the lower side of the storage cylinder 11 is provided with a discharge port 113, and the control valve 14 is arranged at the discharge port 113 and is used for opening or closing the discharge port 113. The feeding device 1 of this application, reasonable in design, compact structure collects predrying and feed in an organic whole, is applicable to the thin material that the moisture content height stickness is big such as processing mud, constantly extrudees the material through extrusion mechanism 12 for the material all receives the effect of extrusion power when carrying out predrying and feed, can effectively prevent to take place the problem of putty, and then guarantees that equipment operation is stable. During the use, close control flap 14 earlier, make discharge gate 113 close, in sending the material into storage vat 11 from feed inlet 111, the great material of water content filters the dewatering through filtering mechanism 13, and simultaneously, extrude the material through extrusion mechanism 12, make the water of material normal water constantly extruded out, guarantee the dewatering effect of material, the water that the filtration obtained passes through delivery port 112 and discharges, accomplish the predrying operation, then open control flap 14, make discharge gate 113 open, extrusion mechanism 12 continues the extrusion material, the material is extruded from discharge gate 113, accomplish the feeding operation.

The side wall of the storage vat 11 is of a double-layer jacket structure, and is sequentially provided with a first jacket 114 and a second jacket 131 from outside to inside, the second jacket 131 comprises a first fixing net, a second fixing net and a filter screen 132, and the filter screen 132 is arranged between the first fixing net and the second fixing net to form a filter mechanism 13; the water outlet 112 is located on the first jacket 114. The wet material in the storage tank 11 is continuously extruded by the extruding mechanism 12, the solid matter in the wet material is limited in the second jacket 131 by the filter screen 132, and the water in the wet material passes through the filter screen 132 of the second jacket 131, is extruded into the gap between the first jacket 114 and the second jacket 131, and is discharged through the water outlet 112, so as to achieve the purpose of pre-drying. The mesh size of the filter 132 can be selected according to the particle size of the solid matter in the wet material. The two sides of the filter screen 132 are fixed by the first fixing net and the second fixing net respectively, so that the filter mechanism 13 has certain enough strength, and the filter mechanism 13 is prevented from being damaged by the extruding mechanism 12. And the first fixing net and the second fixing net are both net-shaped structures, which does not affect the filtering performance of the filter net 132.

The feeding device 1 further comprises a flushing mechanism 15, wherein the flushing mechanism 15 is arranged on the inner wall of the first jacket 114 and is used for flushing the filtering mechanism 13 so as to prevent the filtering holes of the filtering mechanism 13 from being blocked by materials. When the feeding of the feeding device 1 is finished and no material is left in the storage cylinder 11, the flushing mechanism 15 is opened, and the filtering mechanism 13 is flushed. The flushing mechanism 15 can be a plurality of flushing nozzles arranged on the inner wall of the first jacket 114, the flushing nozzles are arranged opposite to the filtering mechanism 13, and the flushing angle of the flushing nozzles can be adjusted so as to better clean the filtering mechanism 13, thereby ensuring the filtering effect of the filtering mechanism 13.

The first fixing net and the second fixing net are both steel nets. The steel mesh is light in weight and high in strength, is convenient to install, and can ensure the structural strength of the filtering mechanism 13; the steel mesh has good plasticity, and cannot be suddenly broken and damaged due to accidental overload or local overload; the steel mesh has good toughness and strong adaptability to dynamic load. Preferably, the first fixing net and the second fixing net are both made of stainless steel materials, have good corrosion resistance and can adapt to the characteristics of high water content and complex property of wet sludge.

Pressing mechanism 12 includes a controller 121, a connecting member 122, and a pressing member 123, connecting member 122 connecting controller 121 and pressing member 123 such that controller 121 controls pressing member 123 to press material in accumulator 11. The controller 121 drives the extrusion piece 123 to extrude the materials through the connecting piece 122, the structure is simple, and the water yield and the discharge amount of the materials can be adjusted through adjustment of the extrusion force.

The open feed inlet 111 that forms of the upside of storage vat 11, extruded piece 123 can stretch into storage vat 11 through feed inlet 111 in, extrude the material. The open feed port 111 facilitates feeding. In one embodiment, the controller 121 is disposed outside the extrusion cylinder, the controller 121 controls the extrusion member 123 to ascend or descend through the connecting member 122, the material is extruded through the gravity of the extrusion member 123, and the extrusion member 123 is matched with the second jacket 131, so that the material in the second jacket 131 can be extruded better. During feeding, the controller 121 controls the extrusion piece 123 to rise, and after the material is fed from the feeding hole 111, the controller 121 controls the extrusion piece 123 to descend, so that the extruded material is filtered to obtain water and discharged. But not limited thereto, the controller 121 may also achieve the purpose of extruding the material by applying a force to the extrusion member 123, and the present invention is not limited thereto.

The controller 121 can be an electric motor or a hydraulic pump, and the control mode is simple and reliable.

The feeding device 1 further comprises a water collecting mechanism 16, wherein the water collecting mechanism 16 is connected with the water outlet 112 and is used for collecting water filtered by the filtering mechanism 13. Collect the water that the filtration was got, can provide the water for if other processes such as washing mechanism 15 on the one hand, make full use of water resource, on the other hand because the water that the mud filtration obtained, the nature is comparatively complicated, and pollutant content is high to concentrate and carry out innocent treatment, comparatively environmental protection.

The discharge port 113 is provided with a mesh 17. The material is easy to agglomerate after being extruded, and the sieve mesh 17 is arranged at the discharge port 113, so that the extruded material can be well dispersed, and the subsequent drying and combustion can be conveniently carried out.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.