CN219136641U - Sludge drying resource utilization device - Google Patents

Abstract

The utility model discloses a sludge drying resource utilization device which comprises a dry feeding unit, a preheating unit, a drying unit and a discharging unit; the dry feeding unit is communicated with the preheating unit; the preheating unit is communicated with the drying unit through a material outlet, a first conveying device is arranged in the preheating unit, vent holes are arranged on the first conveying device, a flue gas inlet is formed in the bottom of the preheating unit, and a first gas outlet is formed in the top of the preheating unit; the drying unit comprises a drying furnace body, a second conveying device is arranged in the drying furnace body, a discharging outlet is arranged at the bottom of the drying furnace body, and the discharging outlet is connected with the discharging unit; a heating device is also arranged in the drying furnace body; a second gas outlet is arranged at the top of the drying furnace body. The utility model combines convection heat transfer and radiation heat transfer to form gradient heating and energy utilization, greatly improves the heat efficiency, reduces the operation cost and provides a brand new way for sludge drying treatment.

Description

Sludge drying resource utilization device

Technical Field

The utility model relates to the field of solid waste treatment, in particular to a sludge drying resource utilization device.

Background

Sludge is a main product produced in the sewage treatment process, and is a complex non-uniform mass composed of organic matters, microbial thalli, protozoan eggs, inorganic particles, colloids and the like. At present, most enterprises attach much importance to sewage treatment, most sewage treatment plants attach much water to light mud, and most mud is dumped and discharged at will to pollute soil and farmlands. The sludge treatment technology in China is relatively late in development, and data show that at present, the sludge treatment modes in China mainly comprise landfill, composting, natural drying, incineration and the like, and the landfill method is mainly used, so that the treatment capacity is insufficient, the treatment means are behind, a large amount of sludge is not subjected to standardized treatment, secondary pollution is caused, and serious threat is caused to the ecological environment.

The water content of the sludge is extremely high, the water content of the sludge after passing through the concentration tank is 95-97%, the water content after filter pressing is about 80%, and sludge drying treatment is needed for reducing the volume and further utilizing later.

Disclosure of Invention

Based on the technical problems, the utility model provides a sludge drying resource utilization device.

The technical scheme adopted by the utility model is as follows:

the sludge drying resource utilization device comprises a dry feeding unit, a preheating unit, a drying unit and a discharging unit; the dry feeding unit comprises a feeding bin and an inclined conveying device, wherein a feeding hole is formed in the bottom of the inclined conveying device, the feeding bin is arranged above the feeding hole, an outlet in the bottom of the feeding bin is communicated with the feeding hole, and a discharging hole is formed in the top of the inclined conveying device;

the preheating unit comprises a preheating furnace body, a discharging hole is formed in the top of one side of the preheating furnace body, the discharging hole is arranged below the discharging hole, and a material outlet is formed in the bottom of the other side of the preheating furnace body; a first conveying device is arranged in the preheating furnace body, vent holes are arranged on the first conveying device, a flue gas inlet is formed in the bottom of the preheating furnace body, and a first gas outlet is formed in the top of the preheating furnace body;

the drying unit comprises a drying furnace body, a material inlet is formed in the top of one side of the drying furnace body, a material outlet of the preheating unit is communicated with the material inlet, a second conveying device is arranged in the drying furnace body, and a discharging outlet is formed in the bottom of the drying furnace body; a heating device is also arranged in the drying furnace body; a second gas outlet is arranged at the top of the drying furnace body;

the discharging unit comprises a slag conveying section, a solid slag inlet is formed in one end of the slag conveying section and communicated with the discharging outlet, a solid slag outlet is formed in the other end of the slag conveying section, and a water-cooling jacket is arranged on the outer side of the slag conveying section.

Preferably, a buffer feeding unit is arranged between the material outlet and the material inlet, the buffer feeding unit comprises a buffer storage bin, the upper part of the buffer storage bin is communicated with the material outlet, the lower part of the buffer storage bin is communicated with the material inlet, and a hinge shear type distributing device is arranged in the buffer storage bin.

Preferably, the hinged-shear type distributing device comprises a first distributing shaft and a second distributing shaft, wherein the first distributing shaft and the second distributing shaft are arranged in parallel, first blades are arranged on the first distributing shaft, and the first blades are symmetrically distributed along the middle position of the first distributing shaft; the second distributing shaft is provided with second blades which are symmetrically distributed along the middle position of the second distributing shaft; and the first blades and the second blades are staggered.

Preferably, the first conveying device is a conveying chain plate, and the aperture of a vent hole on the conveying chain plate is 2-5 mm; the second conveying device is a fire grate, a crawler belt or a chain plate.

Preferably, a high-temperature flue gas collecting pipe is arranged at the top of the drying furnace body and is communicated with the second gas outlet; the flue gas inlets are arranged in a plurality, are arranged at the bottom of the preheating furnace body at intervals, and are communicated with the high-temperature flue gas collecting pipe through an air inlet pipeline.

Preferably, the heating device is a radiant tube or a radiant plate, and the heating device is arranged on the inner wall of the drying furnace body.

Preferably, a plow harrow for turning materials is arranged in the preheating furnace body and the drying furnace body and above the first conveying device and the second conveying device respectively.

Preferably, a plurality of horizontal separation plates are arranged in the drying furnace body, the drying furnace body is divided into a plurality of drying chambers by the horizontal separation plates, and blanking ports are reserved between the horizontal separation plates and the inner wall of the drying furnace body; the upper and lower adjacent two drying chambers are communicated through a blanking port.

Preferably, the device further comprises a condensation unit, the first gas outlet is communicated with the gas inlet of the condensation unit through a first gas conveying pipeline, the gas outlet of the condensation unit is connected with an emptying pipeline, and the condensate water outlet of the condensation unit is connected with the sewage sedimentation unit through a condensate water conveying pipeline.

Preferably, the device further comprises a condensation and separation unit and a gas purification unit, wherein the drying furnace body is communicated with the condensation and separation unit through a second gas conveying pipeline;

the condensing and separating unit comprises a condensing and separating shell, a high-temperature gas inlet is arranged at the lower part of the condensing and separating shell, a second gas conveying pipeline is connected with the high-temperature gas inlet, a filler is arranged in the condensing and separating shell, a third gas outlet is arranged at the top of the condensing and separating shell, and the third gas outlet is communicated with the gas purifying unit;

the gas purification unit comprises a gas purification shell, a non-condensable gas inlet is arranged at the bottom of the gas purification shell and is communicated with a third gas outlet, a desulfurizing agent is arranged in the gas purification shell, a non-condensable gas outlet is arranged at the top of the gas purification shell, and the non-condensable gas outlet is connected with the combustion system through a non-condensable gas conveying pipeline;

the bottom of the condensation separation shell is provided with a liquid outlet, and the liquid outlet is connected with the sewage sedimentation unit through a liquid conveying pipeline.

The beneficial technical effects of the utility model are as follows:

1. the utility model provides a brand new way for sludge drying treatment.

2. The utility model solves the problems of low heat efficiency, high energy consumption, large dust, serious secondary pollution and the like of the conventional sludge drying equipment, and achieves better sludge drying effect and reduces energy consumption as much as possible by means of preheating sludge by hot flue gas and the like; and organic matters and the like in the sludge can be converted into fuel gas by matching the drying unit with the condensation separation unit and the like for the combustion system to fully utilize the effective components in the sludge as much as possible.

3. The utility model combines convection heat transfer and radiation heat transfer to form gradient heating and energy utilization, thereby greatly improving the heat efficiency and reducing the operation cost.

Drawings

The utility model is further described with reference to the drawings and detailed description which follow:

FIG. 1 is a schematic diagram of the structural principle of the present utility model;

FIG. 2 is a schematic view of a partial structural connection of the present utility model;

FIG. 3 is a schematic view of the structure of the hinge-shear type distributor according to the present utility model;

FIG. 4 is a schematic diagram of the structure of the preheating furnace body in the utility model;

fig. 5 is a schematic structural diagram of an embodiment of a drying oven according to the present utility model.

In the figure: the device comprises an I-dry feeding unit, an II-preheating unit, an III-cache feeding unit, an IV-drying unit, a V-condensing unit, a VI-condensing and separating unit, a VII-gas purifying unit, a VIII-sewage sedimentation unit and an IX-discharging unit;

1-feeding bin, 2-feeding port, 3-discharging port, 4-discharging port, 5-first gas outlet, 6-flue gas inlet, 7-material outlet, 8-buffer bin, 9-hinged distributor, 10-high temperature flue gas collecting tube, 11-discharging outlet, 12-air inlet, 13-air outlet, 14-condensed water outlet, 15-high temperature gas inlet, 16-filler, 17-liquid outlet, 18-third gas outlet, 19-liquid inlet, 20-upper circulating water outlet, 21-sewage outlet, 22-non-condensable gas inlet, 23-desulfurizing agent, 24-non-condensable gas outlet, 25-solid slag inlet, 26-water cooling jacket, 27-solid slag outlet, 28-plow harrow, 29-horizontal partition plate, 30-blanking port;

201-a first conveyor means,

401-material inlet, 402-second conveying device, 403-heating device, 404-second gas outlet, 405-drying chamber; 901-first cloth shaft, 902-second cloth shaft, 903-first blade, 904-second blade.

Detailed Description

Referring to the attached drawings, the sludge drying recycling device comprises a dry feeding unit I, a preheating unit II, a drying unit IV and a discharging unit IX. The dry feeding unit I comprises a feeding bin 1 and an inclined conveying device, wherein a feeding hole 2 is formed in the bottom of the inclined conveying device, the feeding bin 1 is arranged above the feeding hole 2, the bottom outlet of the feeding bin 1 is communicated with the feeding hole 2, and a discharging hole 3 is formed in the top of the inclined conveying device. The preheating unit II comprises a preheating furnace body, a feed opening 4 is formed in the top of one side of the preheating furnace body, the feed opening 4 is located below the discharge opening 3, and a feed outlet 7 is formed in the bottom of the other side of the preheating furnace body. A first conveying device 201 is arranged in the preheating furnace body, vent holes are arranged on the first conveying device 201, a flue gas inlet 6 is arranged at the bottom of the preheating furnace body, and a first gas outlet 5 is arranged at the top of the preheating furnace body. The drying unit IV comprises a drying furnace body, a material inlet 401 is arranged at the top of one side of the drying furnace body, and a material outlet 7 of the preheating unit is communicated with the material inlet 401. A second conveying device 402 is arranged in the drying furnace body, and a blanking outlet 11 is arranged at the bottom of the drying furnace body. A heating device 403 is also arranged in the drying furnace body. A second gas outlet 404 is provided at the top of the drying oven. The discharging unit IX comprises a slag conveying section, wherein a solid slag inlet 25 is arranged at one end of the slag conveying section, the solid slag inlet 25 is communicated with the discharging outlet 11, a solid slag outlet 27 is arranged at the other end of the slag conveying section, and a water-cooling jacket 26 is arranged at the outer side of the slag conveying section.

The utility model provides a brand new way for sludge drying treatment. The utility model solves the problems of low heat efficiency, high energy consumption, large dust, serious secondary pollution and the like of the conventional sludge drying equipment, and can achieve better sludge drying effect and reduce energy consumption as much as possible by means of preheating sludge by hot flue gas and the like. The utility model also combines convection heat transfer and radiation heat transfer to form gradient heating and energy utilization, thereby greatly improving the heat efficiency and reducing the operation cost.

As a further design of the present utility model, the above-mentioned inclined conveyor may be a large-inclination belt, a bucket elevator, a scraper, or the like. And conveying the sludge after press filtration to a preheating furnace body through an inclined conveying device.

Still further, be provided with buffering feeding unit III between material export 7 and material import 401, buffering feeding unit III includes buffering feed bin 8, and buffering feed bin 8's upper portion is linked together with material export 7, and buffering feed bin 8's lower part is linked together with material import 401, is provided with hinge and cuts distributing device 9 in buffering feed bin 8's inside. The hinged-shear type distributing device 9 comprises a first distributing shaft 901 and a second distributing shaft 902, the first distributing shaft 901 and the second distributing shaft 902 are arranged in parallel, first blades 903 are arranged on the first distributing shaft 901, and the first blades 903 are symmetrically distributed along the middle position of the first distributing shaft 901. The second cloth shaft 902 is provided with second blades 904, the second blades 904 are symmetrically distributed along the middle position of the second cloth shaft 902, and the first blades 903 and the second blades 904 are staggered. According to the utility model, the hinged shear type distributing device 9 is arranged at the lower part of the buffer storage bin 8, so that the transverse uniform distribution of the sludge can be realized, the feeding particle size of the sludge is further controlled, and the influence on heat transfer caused by overlarge particle size of the sludge is prevented. The blades on the distributing shaft of the hinged-shear type distributing device 9 all present opposite pushing angles, so that after the sludge enters the hinged-shear type distributing device, the sludge can transversely move to two sides, and uniform distribution of solid materials is realized.

Further, the first conveying device 201 is a conveying chain plate, and the aperture of the vent hole on the conveying chain plate is 2-5 mm. The hot flue gas enters the preheating furnace body from the bottom, passes through the sludge from bottom to top through the vent holes on the conveying chain plate, directly contacts with the sludge, transfers heat, and has good sludge preheating effect. The second conveyor 402 is a grate, track, or link plate.

Further, a high-temperature flue gas collecting pipe 10 is arranged at the top of the drying furnace body, and the high-temperature flue gas collecting pipe 10 is communicated with the second gas outlet 404. The flue gas inlets 6 are arranged in a plurality, are arranged at the bottom of the preheating furnace body at intervals, and each flue gas inlet 6 is communicated with the high-temperature flue gas collecting pipe 10 through an air inlet pipeline. Through this setting mode, can ensure that flue gas evenly distributed realizes the high-efficient preheating of mud.

Further, the heating device 403 is a radiant tube or a radiant plate, and the heating device 403 is arranged on the inner wall of the drying furnace body, or respectively arranged at the top and the bottom of the drying furnace body, and can heat the sludge up and down simultaneously.

Furthermore, the plow harrows 28 for turning materials are arranged in the preheating furnace body and the drying furnace body and above the first conveying device 201 and the second conveying device 402 respectively, and the sludge can be turned for a plurality of times by arranging the plow harrows 28, so that heating is promoted, and heating efficiency and heating effect are improved.

Further, a plurality of horizontal partition plates 29 are arranged in the drying furnace body, the drying furnace body is divided into a plurality of drying chambers 405 by the horizontal partition plates 29, and a blanking port 30 is reserved between the horizontal partition plates 29 and the inner wall of the drying furnace body. The upper and lower adjacent drying chambers 405 are communicated through the blanking port 30. The drying chamber 405 may employ two or more layers depending on sludge throughput, etc.

Further, the sludge drying recycling device further comprises a condensation unit V, the first gas outlet 5 is communicated with the gas inlet 12 of the condensation unit V through a first gas conveying pipeline, the gas outlet 13 of the condensation unit is connected with an emptying pipeline, and the condensate water outlet 14 of the condensation unit is connected with a sewage sedimentation unit VIII through a condensate water conveying pipeline. And condensing water vapor in the flue gas discharged from the preheating unit through the condensing unit, discharging the flue gas, and sending the condensed water into the sewage sedimentation unit.

Furthermore, the sludge drying recycling device also comprises a condensation separation unit VI and a gas purification unit VII, and the drying furnace body is communicated with the condensation separation unit VI through a second gas conveying pipeline. The condensation separation unit VI comprises a condensation separation shell, a high-temperature gas inlet 15 is arranged at the lower part of the condensation separation shell, a second gas conveying pipeline is connected with the high-temperature gas inlet 15, a filler 16 is arranged in the condensation separation shell, and a spray head is arranged in the condensation separation shell and above the filler 16. A third gas outlet 18 is arranged at the top of the condensation separation housing, and the third gas outlet 18 is communicated with a gas purifying unit VII. The gas purifying unit VII comprises a gas purifying shell, wherein a non-condensable gas inlet 22 is arranged at the bottom of the gas purifying shell, the non-condensable gas inlet 22 is communicated with a third gas outlet 18, a desulfurizing agent 23 is arranged in the gas purifying shell, a non-condensable gas outlet 24 is arranged at the top of the gas purifying shell, and the non-condensable gas outlet 24 is connected with a combustion system through a non-condensable gas conveying pipeline. The bottom of the condensation separation shell is provided with a liquid outlet 17, and the liquid outlet 17 is connected with a sewage sedimentation unit VIII through a liquid conveying pipeline. The sewage sedimentation unit VIII comprises a sewage sedimentation shell, a liquid inlet 19 is arranged at the top of the sewage sedimentation shell, an upper circulating water outlet 20 is arranged at the upper part of the sewage sedimentation shell, and the upper circulating water outlet 20 is connected with a spray head through a circulating water conveying pipeline. A sewage outlet 21 is arranged at the bottom of the sewage sedimentation shell. The high-temperature gas from the drying furnace body is directly sprayed and cooled to 60-80 ℃ by spraying cooling water, the liquid enters a sewage sedimentation unit VIII, and the gas enters a gas purification unit VII from the top of the device. In the gas purifying unit VII, the gas from the condensing and separating unit is sent to a gas system after liquid separation, desulfurization and pressurization. The sewage from the condensation separation unit is subjected to gravity sedimentation separation in a sewage sedimentation unit VIII, the upper clean water is used as circulating cooling water for spraying, and the lower water is sent to a sewage treatment plant or a sewage treatment device.

The flow of the sludge drying treatment is approximately as follows:

the sludge is sent to a storage bin of the dry feeding unit I and then sent to the preheating unit II through a large-inclination-angle belt or a scraper. The bottom of the preheating furnace body is provided with a flue gas inlet, high-temperature flue gas generated by the drying unit IV is introduced into the preheating furnace body through the flue gas inlet, sludge is flatly paved on the porous chain plate, the flue gas passes through the sludge layer, the sludge is directly heated, and the generated water is carried out of the furnace and enters the condensing unit V. And condensing water and gas in the flue gas by a tube type heat exchanger and the like, discharging the flue gas, and allowing the condensed water to enter a sewage sedimentation unit VIII. The preheated sludge enters a buffer feeding unit III, is buffered by a buffer bin and is sealed by a material, the sludge enters a drying unit IV through a hinged-shear type distributing device 9, is spread on a fire grate, a track or a chain plate, moves along with a conveying device, does not roll and does not extrude, and almost no dust is generated in the treatment process. And a radiation plate or a radiation pipe is adopted as a heat source in the drying furnace body, and the sludge is heated to 60-150 ℃ so that the moisture in the sludge is heated and evaporated. The high-temperature gas enters a condensation separation unit VI through a top high-temperature gas outlet, is directly sprayed and cooled by spraying cooling water, is cooled to 60-80 ℃, is condensed into liquid by water vapor, enters a sewage sedimentation unit VIII, is subjected to gravity sedimentation separation, and then the upper clear water is used as circulating cooling water for spraying and returns to a spray head, and the bottom dust-containing wastewater is sent to a sewage treatment plant for disposal. The noncondensable gas enters a gas purifying unit VII from the top of the device, and is sent into a combustion system after liquid separation, desulfurization and pressurization. And (3) enabling the dried solid slag to enter a discharging unit IX, cooling the solid slag by adopting an indirect water-cooling jacket mode, cooling the solid slag to 30-80 ℃, and then delivering the solid slag into a slag warehouse.

The parts not described in the above modes can be realized by adopting or referring to the prior art.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a sludge drying resource utilization device which characterized in that: comprises a dry feeding unit, a preheating unit, a drying unit and a discharging unit; the dry feeding unit comprises a feeding bin and an inclined conveying device, wherein a feeding hole is formed in the bottom of the inclined conveying device, the feeding bin is arranged above the feeding hole, an outlet in the bottom of the feeding bin is communicated with the feeding hole, and a discharging hole is formed in the top of the inclined conveying device;

the preheating unit comprises a preheating furnace body, a discharging hole is formed in the top of one side of the preheating furnace body, the discharging hole is arranged below the discharging hole, and a material outlet is formed in the bottom of the other side of the preheating furnace body; a first conveying device is arranged in the preheating furnace body, vent holes are arranged on the first conveying device, a flue gas inlet is formed in the bottom of the preheating furnace body, and a first gas outlet is formed in the top of the preheating furnace body;

the drying unit comprises a drying furnace body, a material inlet is formed in the top of one side of the drying furnace body, a material outlet of the preheating unit is communicated with the material inlet, a second conveying device is arranged in the drying furnace body, and a discharging outlet is formed in the bottom of the drying furnace body; a heating device is also arranged in the drying furnace body; a second gas outlet is arranged at the top of the drying furnace body;

the discharging unit comprises a slag conveying section, a solid slag inlet is formed in one end of the slag conveying section and communicated with the discharging outlet, a solid slag outlet is formed in the other end of the slag conveying section, and a water-cooling jacket is arranged on the outer side of the slag conveying section.

2. The sludge drying resource utilization device according to claim 1, wherein: a buffer feeding unit is arranged between the material outlet and the material inlet and comprises a buffer storage bin, the upper part of the buffer storage bin is communicated with the material outlet, the lower part of the buffer storage bin is communicated with the material inlet, and a hinged shear type distributor is arranged in the buffer storage bin.

3. The sludge drying resource utilization device according to claim 2, characterized in that: the hinged-shear type distributing device comprises a first distributing shaft and a second distributing shaft, wherein the first distributing shaft and the second distributing shaft are arranged in parallel, first blades are arranged on the first distributing shaft, and the first blades are symmetrically distributed along the middle position of the first distributing shaft; the second distributing shaft is provided with second blades which are symmetrically distributed along the middle position of the second distributing shaft; and the first blades and the second blades are staggered.

4. The sludge drying resource utilization device according to claim 1, wherein: the first conveying device is a conveying chain plate, and the aperture of a vent hole on the conveying chain plate is 2-5 mm; the second conveying device is a fire grate, a crawler belt or a chain plate.

5. The sludge drying resource utilization device according to claim 1, wherein: the top of the drying furnace body is provided with a high-temperature flue gas collecting pipe which is communicated with a second gas outlet; the flue gas inlets are arranged in a plurality, are arranged at the bottom of the preheating furnace body at intervals, and are communicated with the high-temperature flue gas collecting pipe through an air inlet pipeline.

6. The sludge drying resource utilization device according to claim 1, wherein: the heating device is a radiant tube or a radiant plate and is arranged on the inner wall of the drying furnace body.

7. The sludge drying resource utilization device according to claim 1, wherein: and plow harrows for turning materials are arranged in the preheating furnace body and the drying furnace body and above the first conveying device and the second conveying device respectively.

8. The sludge drying resource utilization device according to claim 1, wherein: a plurality of horizontal separation plates are arranged in the drying furnace body, the drying furnace body is divided into a plurality of drying chambers by the horizontal separation plates, and blanking ports are reserved between the horizontal separation plates and the inner wall of the drying furnace body; the upper and lower adjacent two drying chambers are communicated through a blanking port.

9. The sludge drying resource utilization device according to claim 1, wherein: the sewage sedimentation device comprises a sewage sedimentation unit, and is characterized by further comprising a condensation unit, wherein the first gas outlet is communicated with the gas inlet of the condensation unit through a first gas conveying pipeline, the gas outlet of the condensation unit is connected with an evacuation pipeline, and the condensate water outlet of the condensation unit is connected with the sewage sedimentation unit through a condensate water conveying pipeline.

10. The sludge drying recycling device according to claim 9, wherein: the drying furnace body is communicated with the condensing and separating unit through a second gas conveying pipeline;

the condensing and separating unit comprises a condensing and separating shell, a high-temperature gas inlet is arranged at the lower part of the condensing and separating shell, a second gas conveying pipeline is connected with the high-temperature gas inlet, a filler is arranged in the condensing and separating shell, a third gas outlet is arranged at the top of the condensing and separating shell, and the third gas outlet is communicated with the gas purifying unit;

the gas purification unit comprises a gas purification shell, a non-condensable gas inlet is arranged at the bottom of the gas purification shell and is communicated with a third gas outlet, a desulfurizing agent is arranged in the gas purification shell, a non-condensable gas outlet is arranged at the top of the gas purification shell, and the non-condensable gas outlet is connected with the combustion system through a non-condensable gas conveying pipeline;

the bottom of the condensation separation shell is provided with a liquid outlet, and the liquid outlet is connected with the sewage sedimentation unit through a liquid conveying pipeline.

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