CN209940818U

CN209940818U - Sludge treatment system

Info

Publication number: CN209940818U
Application number: CN201920269870.7U
Authority: CN
Inventors: 程京生; 赵东升
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-04
Filing date: 2019-03-04
Publication date: 2020-01-14
Anticipated expiration: 2029-03-04

Abstract

The utility model relates to an energy environmental protection technology field discloses a sludge treatment system, and this system includes: a supersonic shock wave drying device, a thermal cracking device and an oxidation burning device; the supersonic shock wave drying device comprises: a feed inlet, a hot fluid inlet and a shock wave nozzle; the shock wave nozzle sprays supersonic oscillation shock waves to form high-speed hot fluid with the hot fluid entering from the hot fluid inlet, and the extension direction of the feed inlet is intersected with the spraying path of the shock wave nozzle, so that dry slag is formed on the materials under the impact of the high-speed hot fluid; the dry slag outlet of the supersonic shock wave drying device is communicated with the dry slag inlet of the thermal cracking device, and the dry slag outlet of the thermal cracking device is communicated with the dry slag inlet of the oxidation incineration device. The utility model provides a pair of sludge treatment system can realize the integration of industry danger waste sludge, municipal sludge, oily sludge etc. and handle, has thoroughly solved the solid danger and has wasted.

Description

Sludge treatment system

Technical Field

The utility model relates to an energy environmental protection technology field especially relates to a sludge treatment system.

Background

The traditional urban sludge and domestic garbage oxidation incineration power generation is an effective treatment method generally adopted at home and abroad at present. However, the drying process of municipal sludge and fresh garbage does not reach the standard (when the municipal sludge and the fresh garbage are normally incinerated, the water content of the garbage and the sludge is less than 20%), so that the high energy consumption of incineration power generation and the emission of polluted waste gas and waste liquid are caused, and the problem that the sludge and the waste liquid pollute the environment is long-standing. The main source of the method is the result caused by poor drying quality of municipal hydrous sludge and domestic garbage during oxidation incineration. When the moisture content of the materials is required to be less than 20 percent during the incineration treatment of wet sludge and fresh garbage, the oxidation incineration is in the best state. In the current domestic sludge and garbage incineration device, due to the technical means or the drying cost, the water content of materials is far higher than 20 percent when most enterprises carry out oxidation incineration treatment on municipal sludge, domestic garbage and oily dangerous waste sludge.

In China, a natural gravity infiltration method is mostly adopted to remove partial moisture of domestic garbage and municipal sludge, but the method is difficult to ensure that the moisture content of the material moisture meets the qualified standard of oxidation incineration. Therefore, when the water-containing fresh garbage, municipal sludge and dangerous solid waste are subjected to incineration treatment, a large amount of fuel energy needs to be added to participate in combustion supporting because the water content of the material exceeds the standard and spontaneous combustion cannot be realized, and the operation cost of an incineration power generation project is greatly increased. In order to reduce the water content in municipal sludge and fresh garbage and reach the standard incineration water content, the traditional treatment process is to carry out drying treatment on the sludge, the fresh garbage and the like in advance, and the traditional drying treatment process usually adopts drying devices such as electroosmosis, MDS (multidrug-dry materials) dewaterers, KDS (potassium dihydrogen phosphate) dewaterers, paddle type drying machines, rotary kiln type hot air drying machines and the like to carry out dehydration treatment, however, the devices need to consume a large amount of heat source energy, the energy consumption cost required during material drying occupies a high amount of capital of an incineration environment-friendly enterprise, and the pretreatment quality of the municipal sludge, the fresh garbage, the industrial hazardous waste sludge and the like is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model aims at solving the technical problems of low efficiency and substandard moisture content of the drying treatment of municipal sludge and fresh garbage in the prior art.

(II) technical scheme

To the technical problem who exists among the prior art, the utility model provides a sludge treatment system, include: a supersonic shock wave drying device, a thermal cracking device and an oxidation burning device; the supersonic shock wave drying device comprises: a feed inlet, a hot fluid inlet and a shock wave nozzle; the shock wave nozzle sprays supersonic oscillation shock waves to form high-speed hot fluid with the hot fluid entering from the hot fluid inlet, and the extension direction of the feed port is intersected with the spraying path of the shock wave nozzle, so that dry slag is formed on materials under the impact of the high-speed hot fluid; and a dry slag outlet of the supersonic shock wave drying device is communicated with a dry slag inlet of the thermal cracking device, and a dry slag outlet of the thermal cracking device is communicated with a dry slag inlet of the oxidation incineration device.

Furthermore, a hot flue gas outlet of the oxidation incineration device is respectively communicated with a hot fluid inlet of the supersonic shock wave drying device and an air inlet of the thermal cracking device.

Further, the supersonic shock wave drying device further comprises: a shock wave generator and a current stabilizer; the shock wave generator generates supersonic oscillation shock waves and transmits the shock waves to the shock wave nozzle through the current stabilizer.

Further, the sludge treatment system further comprises: three-phase separators and oil-water separators; the inlet of the three-phase separator is communicated with the fraction outlet of the thermal cracking device, and the oil-water separator is communicated with the liquid outlet of the three-phase separator.

Further, the sludge treatment system further comprises: a condensing unit; the condensing device is arranged on a pipeline which is communicated with the fraction outlet of the thermal cracking device and the inlet of the three-phase separator.

Further, the sludge treatment system further comprises: a circulating water tank; and the water inlet of the circulating water tank is communicated with the water outlet of the oil-water separator, and the water outlet of the circulating water tank is communicated with the circulating water inlet of the condensing device.

Further, the sludge treatment system further comprises: cyclone separators and dust separators; the supersonic shock wave drying device is provided with a flue gas outlet which is communicated with the cyclone separator and the dust remover in sequence.

Further, the sludge treatment system further comprises: and the gas inlet of the tail gas deacidification device is communicated with the flue gas outlet of the dust remover.

Further, the sludge treatment system further comprises: and the inlet of the activated carbon adsorption device is communicated with the gas outlet of the tail gas deacidification device.

Further, the sludge treatment system further comprises: the device comprises a crushing device and a feeder, wherein a material outlet of the crushing device is communicated with a feed inlet of the feeder, and a discharge outlet of the feeder is communicated with a feed inlet of the supersonic shock wave drying device.

(III) advantageous effects

The utility model provides a pair of sludge treatment system loops through supersonic speed shock wave mummification technology, thermal cracking technology, high temperature oxidation incineration technology, can realize the mummification of mud, domestic waste etc. fast, deoil and detach organic harmful substance, realizes the integrated processing of industrial dangerous waste sludge, municipal sludge, oily sludge etc. has thoroughly solved solid dangerous useless, realizes the nuisanceless purification of dirty useless, and the equipment is simple and direct reliable, economic energy-saving; meanwhile, the supersonic shock wave drying device adopts high-speed hot fluid formed by supersonic shock waves to carry out shock wave drying treatment on sludge, household garbage and the like, can quickly and efficiently realize drying and dehydration, and can reduce the water content to below 25%.

Drawings

FIG. 1 is a schematic flow diagram of an embodiment of the sludge treatment system of the present invention;

fig. 2 is a schematic structural view of an embodiment of the supersonic shock wave drying device of the present invention.

Wherein:

101-supersonic shock wave drying device; 102-a thermal cracking unit; 103-oxidizing incineration device; 104-a condensing unit; 105-oil water separator; 106-a cyclone separator; 107-a dust remover; 108-a three-phase separator; 111-a shock generator; 112-a current stabilizer; 101 a-a feeding hole of the supersonic shock wave drying device; 101 b-a hot fluid inlet of the supersonic shock wave drying device; 101 c-shock nozzle; 101 d-a dry slag outlet of the supersonic shock wave drying device; 101 e-a flue gas outlet of the supersonic shock wave drying device.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

FIG. 1 is a schematic flow diagram of an embodiment of the sludge treatment system of the present invention. As shown in fig. 1, the sludge treatment system includes: a supersonic shock wave drying device 101, a thermal cracking device 102 and an oxidation incineration device 103; the supersonic shock wave drying device 101 comprises: a feed inlet 101a, a hot fluid inlet 101b and a shock nozzle 101 c; the shock wave nozzle 101c sprays supersonic oscillation shock waves to form high-speed hot fluid with the hot fluid entering from the hot fluid inlet 101b, and the extension direction of the feed inlet 101a is intersected with the spraying path of the shock wave nozzle 101c, so that dry slag is formed on the materials under the impact of the high-speed hot fluid; a dry slag outlet 101d of the supersonic shock wave drying device is communicated with a dry slag inlet of the thermal cracking device 102, and a dry slag outlet of the thermal cracking device 102 is communicated with a dry slag inlet of the oxidation incineration device 103.

Specifically, in this embodiment, the sludge treatment system can be applied to pollution-free purification treatment of municipal sludge, fresh and alive garbage, industrial hazardous waste sludge and the like, the materials include but are not limited to wet sludge, domestic garbage or industrial solid waste, when domestic garbage or industrial solid waste is treated, it is necessary to perform shredding pretreatment through a crushing device (the crushing device adopts a crusher which is commonly used in the field to perform crushing treatment of domestic garbage, industrial solid waste and the like) to form argillized garbage, and the argillized garbage, municipal sludge, industrial hazardous waste and the like are mixed to form wet sludge and are conveyed into supersonic shock drying through a feeder to perform shock drying treatment. The sludge treatment system of the embodiment is particularly suitable for drying and purifying wet sludge with the water content of 50-80% and the dry basis heat value of more than 3000 Kcal.

Wherein, the supersonic shock wave drying device 101 mainly carries out shock wave drying treatment on wet sludge. Fig. 2 shows a schematic structural diagram of an embodiment of the supersonic shock drying device of the present invention, as shown in fig. 2, the shock drying device includes: the drying device comprises a shell, wherein the shell is provided with a feed inlet 101a, a hot fluid inlet 101b and a drying chamber communicated with the feed inlet 101a and the hot fluid inlet 101b, and a shock nozzle 101c is arranged in the drying chamber.

The shock wave nozzle 101c is used for spraying supersonic oscillation shock waves, and the spraying direction of the shock wave nozzle is vertical to the feeding direction of the feeding hole 101 a; the hot fluid inlet 101b is close to the feeding hole, the hot fluid entering from the hot fluid inlet 101b and the supersonic shock wave form high-speed hot fluid, wet sludge raw materials enter the drying chamber through the feeding hole 101a, fall down through the weight of the wet sludge raw materials, fall onto the spraying path of the shock wave nozzle 101c and then are impacted by the high-speed hot fluid to form dry slag and wet steam, the dry slag is discharged from the dry slag outlet 101d of the supersonic shock wave drying device, and the wet steam is discharged from the smoke outlet 101e of the supersonic shock wave drying device.

It should be noted that the supersonic shockwave in the shockwave nozzle 101c can be provided by a shockwave generator 111 known in the art, and the fluid is accelerated by aerodynamics to generate the supersonic shockwave. The shock wave generator 111 can be connected with the shock nozzle 101c through the current stabilizer 112, and the shock wave generator 111 generates supersonic oscillating shock waves and transmits the supersonic oscillating shock waves to the shock nozzle 101c through the current stabilizer 112.

The working principle of the supersonic shock wave drying device 101 is as follows: supersonic shock waves are sprayed out of the shock wave nozzle 101c and collide with wet sludge to break the sludge into fine particles, when the fluid speed reaches supersonic speed to form a sound barrier effect, the sludge is efficiently and thoroughly broken, the heat exchange area of the broken sludge particles is greatly increased, the heat transfer efficiency between the sludge and hot fluid is improved, and then water adsorbed or contained in the sludge is instantly vaporized (the temperature of the hot fluid is rapidly reduced to be below 200 ℃ in 1 second), so that dry slag and wet steam are generated, the purpose of sludge drying is realized, the shock wave drying device is rapid and efficient in drying treatment, rapid dehydration can be realized, and the water content can be reduced to be below 25%.

The dry slag discharged from the dry slag outlet 101d of the supersonic shock wave drying device enters the thermal cracking device 102 for high-temperature cracking, oil and water in the dry slag are further evaporated and removed, the water content in the dry slag is further reduced, the dry slag can be cracked at different temperatures, so that fractions with different boiling points are removed, and the fractions are discharged from the fraction outlet of the thermal cracking device 102.

The dry residue after the oil and water are removed by the high temperature cracking in the thermal cracking device 102 is discharged from the dry residue outlet of the thermal cracking device 102, and enters the oxidation incineration device 103 through the dry residue inlet of the oxidation incineration device 103 for high temperature oxidation incineration, so as to further remove organic harmful substances in the dry residue, the organic harmful substances form hot flue gas, the dry residue is incinerated to form carbon residue, and the heat can be recycled.

The utility model provides a pair of sludge treatment system loops through supersonic speed shock wave mummification device 101, thermal cracking device 102, high temperature oxidation and burns device 103, can realize mummification, deoiling and detach organic harmful substance of mud, domestic waste etc. fast, realizes the integration treatment of industry danger waste sludge, municipal sludge, oily mud etc. thoroughly has solved solid danger and has wasted, realizes the pollution-free purification of dirty useless, and simple and direct reliable, the economic energy-saving of equipment.

On the basis of the above embodiment, in this embodiment, the hot flue gas outlet of the oxidation incineration device 103 is respectively communicated with the hot fluid inlet 101b of the supersonic shock wave drying device and the thermal cracking air inlet. The hot flue gas generated in the oxidation incineration device 103 has high heat, can be used as hot fluid to enter the supersonic shock wave drying device 101 from a hot fluid inlet, and forms high-speed hot fluid by combining high-temperature heat with supersonic shock waves, so that the raw materials such as wet sludge and the like are subjected to shock wave drying treatment, the energy is recycled, the energy consumption is saved, and the environmental pollution is reduced.

On the basis of the foregoing embodiments, in this embodiment, the system further includes: a three-phase separator 108 and an oil-water separator 105; the inlet of the three-phase separator 108 is communicated with the fraction outlet of the thermal cracking device 102, and the oil-water separator 105 is communicated with the liquid outlet of the three-phase separator 108.

The fraction produced by the high-temperature pyrolysis in the thermal cracking device 102 contains solid residue, oil and moisture, and can be separated into solid residue and oil and water after entering the three-phase separator 108, and the oil and water can be separated into oil and moisture after entering the oil-water separator 105, so that three-phase separation is realized, and the oil and water can be independently recycled.

On the basis of the foregoing embodiments, in this embodiment, the system further includes: condensing unit 104 and a circulating water tank; the condensing device 104 is arranged on a pipeline which is communicated with the distillate outlet of the thermal cracking device 102 and the inlet of the three-phase separator 108; the water inlet of the circulating water tank is communicated with the water outlet of the oil-water separator 105, and the water outlet of the circulating water tank is communicated with the circulating water inlet of the condensing device 104.

The condensing unit 104 is used for cooling the fraction discharged from the thermal cracking unit 102 to facilitate the subsequent separation process. Wherein, the condensing unit 104 can be a condenser which can cool the pipeline and the equipment by circulating water, which is known by those skilled in the art. Through setting up the circulating water pond, with the delivery port of oil water separator 105 and the circulating water import intercommunication of condenser, can make full use of the moisture that obtains in the sludge treatment system separation, practice thrift energy consumption and water resource, reduction in production cost.

On the basis of the foregoing embodiments, in this embodiment, the system further includes: a cyclone 106 and a dust collector 107; the flue gas outlet 101e of the supersonic shock wave drying device is sequentially communicated with the cyclone separator 106 and the dust remover 107, namely the flue gas outlet 101e is communicated with the inlet of the cyclone separator 106, and the outlet of the cyclone separator 106 is communicated with the inlet of the dust remover 107. The flue gas formed by mixing wet steam generated after shock wave impact and other gases in the supersonic shock wave drying device is discharged from a flue gas outlet 101e, sequentially enters a cyclone separator 106 and a dust remover 107 to remove impurities in the wet steam, and is discharged from a flue gas outlet of the dust remover 107 after the steam is purified, so that clean discharge is realized, and environmental pollution is reduced.

On the basis of the foregoing embodiments, in this embodiment, the method further includes: and a gas inlet of the tail gas deacidification device is communicated with a flue gas outlet of the dust remover 107. The tail gas discharged after impurity removal through the cyclone separator 106 and the dust remover 107 is deacidified through a tail gas deacidification device, and acidic substances causing environmental pollution in the tail gas are removed.

On the basis of the foregoing embodiments, in this embodiment, the method further includes: the inlet of the active carbon adsorption device is communicated with the gas outlet of the tail gas deacidification device. And after the tail gas is subjected to deacidification treatment, secondary impurity removal is carried out on the tail gas by an activated carbon adsorption device, and the tail gas is further purified.

It should be noted that the "tail gas deacidification device" and the "activated carbon adsorption device" are all deacidification treatment equipment and activated carbon adsorption equipment commonly used in the field.

The utility model also provides a sludge treatment method, this method is based on the sludge treatment method of foretell sludge treatment system implementation, and this method includes:

step S1: wet sludge raw materials enter from a feeding hole 101a of the supersonic shock wave drying device, and are subjected to shock wave drying through high-speed hot fluid formed by the hot fluid and supersonic shock waves sprayed by a shock wave nozzle 101c to obtain dry residues and wet steam; the working temperature of the supersonic shock wave drying device 101 is preferably 300-350 ℃, that is, the temperature of the high-speed hot fluid formed in the supersonic shock wave drying device is 300-350 ℃. The shock wave drying process can quickly and efficiently realize drying dehydration, and the water content can be reduced to below 25%.

Step S2: the dry slag is discharged from a dry slag outlet 101d of the supersonic shock wave drying device and enters a thermal cracking device 102 for high-temperature cracking, and oil-containing fractions in the dry slag are removed; wherein the cracking temperature is preferably 600-650 ℃, at which the fraction with the boiling point within 600 ℃ in the dry slag is gasified and discharged, and the remaining components are carbon residue and inorganic matter, which are mixed to form carbon slag.

Step S3: and discharging the dry slag subjected to high-temperature cracking from a dry slag outlet of the thermal cracking device 102, introducing the dry slag into an oxidation incineration device 103 for high-temperature oxidation incineration, and removing organic substances in the dry slag to form slag for discharge.

In the incineration process, organic harmful substances form hot smoke, dry slag is incinerated and oxidized, heat can be recycled, and finally vitrified furnace slag is generated. The oxidation incineration device 103 can adopt a reciprocating grate incinerator, and can carry out reciprocating high-temperature oxidation to thoroughly remove organic harmful substances in dry slag. The high-temperature oxidation temperature is preferably over 800 ℃, so that harmful substances such as dioxin and the like are avoided. After the high-temperature oxidation process, the organic matter content in the discharged vitrified slag is less than one per thousand, and the vitrified slag can be directly reduced in soil to improve the ecological environment of the soil.

Further, step S3 further includes: after high-temperature oxidation incineration, hot flue gas generated by incineration is discharged from a hot flue gas outlet of the oxidation incineration device 103 and enters the supersonic shock wave drying device 101 and the thermal cracking device 102 respectively for energy recycling, so that energy is recycled, energy consumption is saved, and environmental pollution is reduced.

Further, step S1 further includes: the flue gas containing wet steam and discharged from the flue gas outlet of the supersonic shock wave drying device sequentially enters the cyclone separator 106 and the dust remover 107 to remove impurities in the flue gas and purify the discharged steam, thereby realizing clean discharge and reducing environmental pollution.

Further, step S2 further includes: the oil-containing fraction enters the three-phase separator 108 and the oil-water separator 105 in sequence, solid residue, oil and water are obtained through separation, the separated oil is sent to an oil storage tank for recycling, and the separated water enters a sedimentation tank or is stored in a circulating water tank and sent to the condensing device 104 for recycling, so that the temperature of the three-phase separator 108 is reduced.

The utility model provides a pair of sludge treatment system loops through supersonic speed shock wave mummification technology, thermal cracking technology, high temperature oxidation incineration technology, can realize the mummification of mud, domestic waste etc. fast, deoil and detach organic harmful substance, realizes the integrated processing of industrial dangerous waste sludge, municipal sludge, oily sludge etc. has thoroughly solved solid dangerous useless, realizes the nuisanceless purification of dirty useless, and the equipment is simple and direct reliable, economic energy-saving; meanwhile, in the supersonic shock wave drying process, high-speed hot fluid formed by supersonic shock waves is used for carrying out shock wave drying treatment on sludge, household garbage and the like, drying and dehydration can be rapidly and efficiently realized, and the water content of the sludge and the household garbage can be reduced to below 25%.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge treatment system, comprising: a supersonic shock wave drying device, a thermal cracking device and an oxidation burning device;

the supersonic shock wave drying device comprises: a feed inlet, a hot fluid inlet and a shock wave nozzle;

the shock wave nozzle sprays supersonic oscillation shock waves to form high-speed hot fluid with the hot fluid entering from the hot fluid inlet, and the extension direction of the feed port is intersected with the spraying path of the shock wave nozzle, so that dry slag is formed on materials under the impact of the high-speed hot fluid;

and a dry slag outlet of the supersonic shock wave drying device is communicated with a dry slag inlet of the thermal cracking device, and a dry slag outlet of the thermal cracking device is communicated with a dry slag inlet of the oxidation incineration device.

2. The sludge treatment system of claim 1, wherein the hot flue gas outlet of the oxidation incineration device is respectively communicated with the hot fluid inlet of the supersonic shock wave drying device and the air inlet of the thermal cracking device.

3. The sludge treatment system of claim 1, wherein the supersonic shock drying apparatus further comprises: a shock wave generator and a current stabilizer; the shock wave generator generates supersonic oscillation shock waves and transmits the shock waves to the shock wave nozzle through the current stabilizer.

4. The sludge treatment system of claim 1, further comprising: three-phase separators and oil-water separators; the inlet of the three-phase separator is communicated with the fraction outlet of the thermal cracking device, and the oil-water separator is communicated with the liquid outlet of the three-phase separator.

5. The sludge treatment system of claim 4, further comprising: a condensing unit; the condensing device is arranged on a pipeline which is communicated with the fraction outlet of the thermal cracking device and the inlet of the three-phase separator.

6. The sludge treatment system of claim 5, further comprising: a circulating water tank; and the water inlet of the circulating water tank is communicated with the water outlet of the oil-water separator, and the water outlet of the circulating water tank is communicated with the circulating water inlet of the condensing device.

7. The sludge treatment system of claim 1, further comprising: cyclone separators and dust separators; the supersonic shock wave drying device is provided with a flue gas outlet which is communicated with the cyclone separator and the dust remover in sequence.

8. The sludge treatment system of claim 7, further comprising: and the gas inlet of the tail gas deacidification device is communicated with the flue gas outlet of the dust remover.

9. The sludge treatment system of claim 8, further comprising: and the inlet of the activated carbon adsorption device is communicated with the gas outlet of the tail gas deacidification device.

10. The sludge treatment system of claim 1, further comprising: the device comprises a crushing device and a feeder, wherein a material outlet of the crushing device is communicated with a feed inlet of the feeder, and a discharge outlet of the feeder is communicated with a feed inlet of the supersonic shock wave drying device.