CN210313974U

CN210313974U - Sludge reduction treatment system

Info

Publication number: CN210313974U
Application number: CN201920764376.8U
Authority: CN
Inventors: 葛华; 陈双艳; 秦子柔
Original assignee: Jiangsu Anshi Environmental Technology Co ltd
Current assignee: Jiangsu Anshi Environmental Technology Co ltd
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-04-14
Anticipated expiration: 2029-05-24

Abstract

The utility model discloses a sludge decrement processing system. The technical scheme of the utility model is that: including mud heating power steam explosion module, solid-liquid separation module, vapor collection module, mud collection and recycle module and transport module, mud heating power steam explosion module is including the sludge tank, steam, compressed air, the steam explosion host computer and the processing jar group that contain mud, solid-liquid separation module includes the solid-liquid separation ware with processing jar group intercommunication, vapor collection module includes the vapor spraying recovery tower of being connected with the steam explosion host computer, the mud is collected and is recycled the module and is connected with solid-liquid separation ware, transport module is including setting up pipeline and the conveyer between each module. The utility model provides a scheme satisfies the mud decrement processing system that minimizing, innoxious, stabilization and resourceful treatment required completely.

Description

Sludge reduction treatment system

Technical Field

The utility model relates to a sludge treatment technical field, in particular to resource recycling sludge decrement processing system.

Background

With the economic development, the amount of urban sewage is increasing. According to relevant prediction, the annual yield of the dry sludge in China is very high at present. The municipal sludge contains a large amount of N, P, K, Ca and organic matters, N, P is mainly in an organic state, can be slowly released, and has long-acting property. The sludge is a useful biological resource, and if the sludge can be reasonably utilized, the sludge can be changed into valuables.

The sludge treatment is a harmless processing process for the sludge, and comprises the steps of removing heavy metals, pathogens, worm eggs, carcinogens, organic matter macromolecules and the like in the sludge. The existing newer sludge treatment methods mainly comprise a sludge wet oxidation method and a membrane bioreactor treatment method.

The wet sludge oxidation process (WO process) is a process in which sludge is placed in a closed reactor, air or oxygen is introduced as an oxidant under the conditions of high temperature and high pressure, organic matters in the sludge are oxidized and decomposed according to the submerged combustion principle, and the organic matters are converted into inorganic matters. The method is mainly suitable for treating various organic sludge difficult to degrade and has the defects of complex equipment and high operation and maintenance cost.

The membrane bioreactor processing method is a new process formed by combining a membrane system in a membrane separation technology and a bioreactor in a sewage biological treatment project. The sludge retention time in the membrane bioreactor is very long, so that the process time is long, the treatment efficiency is low, and even sludge discharge can be avoided, but the popularization and application of the method are limited by the problems of membrane blockage and membrane material price.

After the two schemes are discharged, a more perfect scheme is provided aiming at the characteristic that the sludge in the sewage plant can be used for burning auxiliary fuel for power generation in the boiler of the power plant after being reduced. According to the thought of "energy saving and emission reduction" and "circular economy", the heat source that make full use of mud had and waste heat advantage and the peculiar calorific value of mud self carry out resource utilization to municipal sewage plant mud, and simultaneously, the power plant mixes and burns mummification mud and carries out the boiler incineration electricity generation, and whole process both can reach national environmental standard, and it is right to realize the purpose to the innocent treatment and the resource utilization of municipal sludge again the utility model discloses the problem that the people will solve.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, the main object of the utility model is to provide a sludge decrement processing system who satisfies minimizing, innoxious, stabilization and resourceization completely.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a sludge decrement processing system, includes that mud heating power steam explosion module, solid-liquid separation module, vapor collection module, mud are collected and are recycled module and transport module, mud heating power steam explosion module is including the sludge tank, steam, compressed air, the steam explosion host computer and the processing jar group that contain mud, solid-liquid separation module includes the solid-liquid separation ware with processing jar group intercommunication, vapor collection module includes the vapor that is connected with the steam explosion host computer and sprays the recovery tower, the mud is collected and is recycled the module and is connected with solid-liquid separation ware, transport module is including setting up pipeline and the conveyer between each module.

Preferably, the treatment tank group is a hydrolysis tank, a gas production tank and a conditioning tank which are connected in sequence, and a screw pump is arranged between the steam explosion host and the hydrolysis tank.

Preferably, the solid-liquid separator is a filter press, and a feeding pump is arranged between the tempering tank and the filter press.

Preferably, the conveyor is a positive pressure screw feeder arranged in the pipeline.

Preferably, the sludge thermal steam explosion module is connected with a sludge pretreatment module, and the sludge pretreatment module comprises a horizontal centrifuge, a sludge tank and a plunger pump arranged between the sludge tank and the steam explosion host.

Preferably, the solid-liquid separator is connected with a water recovery unit and a sludge recovery unit, the water recovery unit is connected to a sewage plant through a pipeline, the water recovery unit is an integrated sewage treatment device, and the integrated sewage treatment device comprises an anoxic treatment unit, an anaerobic treatment unit, an MBBR treatment unit and a precipitation unit.

The utility model discloses have following advantage for prior art, the minimizing: besides water, the sludge contains 50-60% of organic matter (volatile matter) and 40-45% of ash, and the main component is ash after steam explosion and reduction. Taking 1 ton of sludge with water content of 80% as an example, the sludge formed after steam explosion reduction is only about 200 kg, and the reduction rate reaches 80%.

Harmlessness and stabilization: no chemical agent is needed to be added in the steam explosion process; harmful pollutants such as bacteria, pathogens and the like in the sludge are killed and cracked under high temperature and high pressure; the odor and the like in the production process can be completely decomposed after biological and chemical treatment; the water evaporated in the sludge steam explosion process is absorbed by the adsorption condensation of the spray tower.

Resource utilization: the sludge incineration can utilize the heat of the sludge to the maximum extent and can recover and supplement most of energy required by sludge treatment; the sludge incineration ash is an excellent building material raw material and can be completely utilized.

Drawings

FIG. 1 is a block diagram of a sludge reduction treatment system according to the present invention;

FIG. 2 is a connection diagram of the sludge reduction treatment system of the present invention.

In the figure: 1. a sludge thermal steam explosion module; 2. a solid-liquid separation module; 3. a water vapor collection module; 4. a sludge collection and reuse module; 5. a delivery module; 6. a steam explosion host; 7. a gas boiler; 8. an air compressor; 9. a gas storage tank; 10. a plunger pump; 11. a screw pump; 12. a treatment tank group; 121. a hydrolysis tank; 122. a gas generating tank; 123. a tempering tank; 13. a filter press; 14. an integrated sewage treatment device; 16. A feed pump.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, a sludge reduction treatment system comprises a sludge thermal steam explosion module 1, a solid-liquid separation module 2, a steam collection module 3, a sludge collection and reuse module 4 and a conveying module 5, wherein the sludge thermal steam explosion module 1 comprises a steam explosion host 6 and a treatment tank set, the solid-liquid separation module 2 comprises a solid-liquid separator communicated with the treatment tank set, the steam collection module 3 comprises a steam spray recovery tower connected with the steam explosion host 6, the sludge collection and reuse module 4 is connected with the solid-liquid separator, and the conveying module 5 comprises pipelines and conveyors arranged among the modules.

Referring to the attached drawing 1, the system structure block diagram of the scheme is that the sludge can be subjected to steam explosion through a sludge thermal steam explosion module 1, the sludge after the steam explosion is conveyed to a solid-liquid separation module 2, and a steam collection module 3 can collect steam generated during the steam explosion; the sludge passing through the solid-liquid separation module 2 respectively generates moisture and ash, the moisture is conveyed to a sewage treatment plant through the conveying module 5, and the ash is conveyed to a power plant for incineration disposal or is reused as building materials. Compared with the prior art, the scheme has the advantages that the whole system is built in a modularized integration mode, pipeline transportation is achieved, the whole process is unattended, and the whole process is completely intelligent. The whole process has no overflow of any solid, liquid and gas, the working environment is neat and orderly, and the whole environment of the water plant is effectively improved. Wherein steam is provided by gas boiler 7, and gas boiler 7's raw materials are municipal gas and municipal running water, and compressed air compressor 8 provides, and air compressor 8 is connected with gas holder 9.

Preferably, the treatment tank group comprises a hydrolysis tank 121, a gas production tank 122 and a conditioning tank 123 which are connected in sequence, and a screw pump 11 is arranged between the steam explosion main machine 6 and the treatment tank group 12.

Preferably, the solid-liquid separator is a filter press 13, and a feed pump 16 is disposed between the conditioning tank 123 and the filter press 13.

Preferably, the sludge thermal steam explosion module 1 is connected with a sludge pretreatment module, and the sludge pretreatment module comprises a horizontal centrifuge, a sludge tank 15 and a plunger pump 10 arranged between the sludge tank 15 and the steam explosion host 6.

Preferably, the solid-liquid separator is connected with a water recovery unit and a sludge recovery unit, the water recovery unit is connected to a sewage plant through a pipeline, the water recovery unit is an integrated sewage treatment device 14, and the integrated sewage treatment device 14 comprises an anoxic treatment unit, an anaerobic treatment unit, an MBBR treatment unit and a precipitation unit.

A sludge reduction treatment process, which comprises the following steps,

(1) the water content of the sludge generated by the sewage treatment plant is 80 percent after the sludge is dehydrated by a horizontal centrifuge, the sludge is stored in a sludge tank, and the sludge in the sludge tank is thrown into a steam explosion host 6 through a conveying system;

(2) the steam explosion host 6 heats and pressurizes the sludge by using saturated steam with the temperature of 230 ℃ and the pressure of 2.5MPa, and instantly releases the sludge after stabilizing the pressure for 15 minutes to finish primary explosion;

(3) the sludge after steam explosion is transferred into a treatment tank group, and then the sludge is pumped into a solid-liquid separator by a slurry pump in a pipeline form to realize solid-liquid separation;

(4) and (4) treating the water generated in the step (3) after solid-liquid separation, and then conveying the treated water to a sewage plant, wherein the generated mud is conveyed to a power plant for incineration disposal or is reused as a building material.

Preferably, the conveying system in the step (1) adopts pressure conveying in a pipeline form, the output of the conveying system is 10t/h, the conveying system comprises a conveying pump, a connected discharge port opening and closing device and feeding equipment, the feeding equipment adopts a positive pressure screw feeder, screw feeding is utilized for pre-pressing, and the positive pressure screw feeder can convey sludge to the hydraulic plunger pump 10.

Preferably, the pipeline is a steel pipe lined with ultra-high molecular weight polyethylene.

The conveying system is characterized in that the sludge is conveyed into the steam explosion main machine 6 from a sludge tank 15 through a pipeline by using a special sludge plunger pump 10, and the slurry mixture after steam explosion is also conveyed into the solid-liquid separator through a pipeline. The conveying system is matched with the steam explosion system, pressure conveying is adopted, and the output of the system is 10 t/h. The discharge port opening and closing device is connected with the lower feeding device, the feeding device adopts a positive pressure feeder, and the screw feeding is utilized for prepressing, so that the higher sludge suction rate can be realized. The positive-pressure feeder can convey sludge to the conveying pump, the conveying pump adopts the hydraulic plunger pump 10, the sewage containing capacity is high, long-distance conveying can be achieved, 1 hydraulic plunger pump 10 is correspondingly configured for each feeder, and the output is 15t/h and is 2 in total. The conveying pipeline adopts a steel pipe lined with ultra-high molecular polyethylene, the conveying capacity is 15t/h, and the pipe diameter is 200 mm.

The sludge reduction treatment system has the working flow that sludge produced by a sewage treatment plant has the water content of about 80 percent after passing through a horizontal centrifuge and is stored in a sludge tank 15, and sludge in the sludge tank 15 is pumped into a steam explosion host machine 6 by a sludge plunger pump 10 in a pipeline form, wherein the steam explosion host machine 6 adopts a QB-1000 type gas explosion machine, a boiler (both electric and gas) is configured, and 230-degree 2.5MPa saturated steam is utilized to heat and pressurize the sludge. The pressure is stabilized for 15 minutes and then released instantly, thereby completing one-time blasting. And transferring the sludge subjected to steam explosion into a treatment tank group, pumping the sludge into a solid-liquid separator by adopting a slurry pump in a pipeline form to realize solid-liquid analysis, and condensing and recovering water vapor generated in the steam explosion process by adopting a spray tower.

The scheme has the advantages that: the whole system is built by adopting modularization integration, is conveyed by pipelines, is unattended in the whole process and is completely intelligent. The whole process has no overflow of any solid, liquid and gas, the working environment is neat and orderly, and the whole environment of the water plant is effectively improved. Does not need manual intervention, occupies small area and is suitable for the situation of land resource shortage at present. The method has no requirement on the water content of the original sludge, and is suitable for sludge with 99-40% of water content.

In particular, the following objectives can be achieved:

and (3) reduction: besides water, the sludge contains 50-60% of organic matter (volatile matter) and 40-45% of ash, and the main component is ash after steam explosion and reduction. Taking 1 ton of sludge with water content of 80% as an example, the sludge formed after steam explosion reduction is only about 200 kg, and the reduction rate reaches 80%.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A sludge decrement processing system is characterized in that: including mud heating power steam explosion module, solid-liquid separation module, vapor collection module, mud collection and recycle module and transport module, mud heating power steam explosion module is including the sludge tank, steam, compressed air, the steam explosion host computer and the processing jar group that contain mud, solid-liquid separation module includes the solid-liquid separation ware with processing jar group intercommunication, vapor collection module includes the vapor spraying recovery tower of being connected with the steam explosion host computer, the mud is collected and is recycled the module and is connected with solid-liquid separation ware, transport module is including setting up pipeline and the conveyer between each module.

2. The sludge reduction treatment system according to claim 1, wherein: the treatment tank group comprises a hydrolysis tank, a gas production tank and a conditioning tank which are connected in sequence, and a screw pump is arranged between the steam explosion main machine and the hydrolysis tank.

3. The sludge reduction treatment system according to claim 2, wherein: the solid-liquid separator is a filter press, and a feeding pump is arranged between the tempering tank and the filter press.

4. The sludge reduction treatment system according to claim 1, wherein: the conveyer is a positive pressure screw feeder arranged in the pipeline.

5. The sludge reduction treatment system according to claim 1, wherein: the sludge thermal steam explosion module is connected with a sludge pretreatment module, and the sludge pretreatment module comprises a horizontal centrifuge, a sludge tank and a plunger pump arranged between the sludge tank and the steam explosion host.

6. The sludge reduction treatment system according to claim 1, wherein: the solid-liquid separator is connected with a water recovery unit and a mud recovery unit, the water recovery unit is connected to a sewage plant through a pipeline, and the water recovery unit is an integrated sewage treatment device.