CN210030394U

CN210030394U - Sludge comprehensive treatment system

Info

Publication number: CN210030394U
Application number: CN201822271944.9U
Authority: CN
Inventors: 孟龙; 吴朝锋; 谢品有
Original assignee: Enlightenment Sander Environmental Resources Co Ltd
Current assignee: Enlightenment Sander Environmental Resources Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-02-07
Anticipated expiration: 2028-12-29

Abstract

The utility model discloses a mud integrated processing system, this system includes: electroosmosis sludge high-dry dehydration equipment, granulation drying equipment and high-temperature pyrolysis gasification equipment; the electroosmosis sludge high-dry dehydration equipment is provided with a dried sludge outlet, and the dried sludge outlet is connected with granulation drying equipment; the granulation drying equipment is provided with a sludge particle outlet which is connected with the high-temperature pyrolysis gasification equipment; the high-temperature pyrolysis gasification equipment is provided with a hot air outlet and a waste heat outlet which are respectively connected back to the granulation drying equipment. The treatment system is reliable in operation and long in service life, 1 ton of sludge with 80% water content is treated, the energy consumption is as low as 90kwh, the water content of the sludge can be quickly reduced to be below 30%, the sludge is granulated and treated, and the sludge is recycled.

Description

Sludge comprehensive treatment system

Technical Field

The utility model relates to a sludge treatment field especially relates to a sludge comprehensive treatment system.

Background

The existing sludge treatment methods comprise treatment methods such as landfill, aerobic fermentation, drying incineration, pyrolysis and the like, but the methods often have the problems of high energy consumption, incomplete treatment, secondary pollution avoidance effect after treatment and the like due to the fact that medicaments and auxiliary materials are required to be added.

SUMMERY OF THE UTILITY MODEL

Based on the problem that prior art exists, the utility model aims at providing a mud integrated processing system can realize mummification, granulation and pyrolysis and synthesize the mode and handle mud, promotes the treatment effect of mud.

The utility model aims at realizing through the following technical scheme:

the embodiment of the utility model provides a sludge comprehensive treatment system, a serial communication port, include:

electroosmosis sludge high-dry dehydration equipment, granulation drying equipment and high-temperature pyrolysis gasification equipment; wherein the content of the first and second substances,

the electroosmosis sludge high-dry dehydration equipment is provided with a dried sludge outlet, and the dried sludge outlet is connected with the granulation drying equipment;

the granulation drying equipment is provided with a sludge particle outlet which is connected with the high-temperature pyrolysis gasification equipment;

the high-temperature pyrolysis gasification equipment is provided with a hot gas outlet and a waste heat outlet, and the hot gas outlet and the waste heat outlet are respectively connected back to the granulation drying equipment.

By the above, the utility model provides a technical scheme can see out, the embodiment of the utility model provides a sludge comprehensive treatment system, its beneficial effect is:

through setting up the electroosmosis mud high dry dewatering equipment of organic connection, granulation drying equipment and high temperature pyrolysis gasification equipment, can realize carrying out the mummification to mud, granulation and pyrolysis gasification's integrated processing, need not add chemical, the operation is reliable, long service life, handle 1 ton 80% moisture content mud, the energy consumption is low to 90kwh, can realize fast that mud moisture content reduces to below 30%, the mud granulation is dealt with, realize mud utilization, and because pyrolysis gas can light production heat retrieval and utilization to granulation drying equipment, the high-efficient and pollution-free treatment mud of low energy has been realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a sludge integrated treatment system according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for comprehensive treatment of sludge according to an embodiment of the present invention;

the reference numbers in the figures are: 100-electroosmosis sludge high-dry dehydration equipment; 110-temporary sludge storage; 120-electroosmosis high-dry dehydration device; 130-sludge crushing and conveying device; 200-granulation drying equipment; 210-temporary storage of mud cake particles; 220-granulating machine; 230-rotary kiln; 240-first water washing device; 250-a first alkaline washing device; 260-a dust removal device; 270-a second induced draft fan; 300-high temperature pyrolysis gasification equipment; 310-a lifting device; 320-pyrolysis gasifier; 330-a second water washing device; 340-a high pressure fan; 350-a second alkali washing device; 360-a second dust removal device; 370-a combustible gas storage tank; 380-second combustion chamber; 390-air supplement fan; 391-slag outward transportation device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the specific contents of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.

As shown in FIG. 1, the embodiment of the present invention provides a sludge comprehensive treatment system, which comprises:

In the above-mentioned system, the high dry dewatering equipment of electroosmosis mud includes:

the device comprises a sludge temporary storage bin, an electroosmosis high-dry dehydration device and a sludge crushing and conveying device; wherein the content of the first and second substances,

the sludge temporary storage bin is connected with the electroosmosis high-dryness dehydration device;

the electroosmosis high-dryness dehydration device is provided with a dried sludge outer discharge port, and the dried sludge outer discharge port is connected with the sludge crushing and conveying device;

the sludge crushing and conveying device is connected with a dried sludge outlet of the granulation drying equipment.

In the above-mentioned system, broken conveyor of mud includes:

crushers and shaftless screw conveyors; wherein the content of the first and second substances,

the crusher is connected with an outer dried sludge discharge port of the electroosmosis high-dryness dehydration device, a biomass inlet is formed in an outlet of the crusher, an outlet of the crusher is connected with a shaftless screw conveyor, and the shaftless screw conveyor is connected with the granulation drying equipment.

In the above system, the granulation drying apparatus includes:

the rotary kiln, the first water washing device, the second alkali washing device, the second induced draft fan, the dust removal device, the mud cake particle temporary storage bin and the granulator; wherein the content of the first and second substances,

the rotary kiln is provided with a dried sludge inlet, a dried sludge outlet, a hot gas inlet and a water washing port, the dried sludge inlet is connected with a dried sludge outlet of the electroosmosis sludge high-dry dehydration equipment, the dried sludge outlet is sequentially connected with the mud cake particle temporary storage bin and the granulator, and the granulator is provided with a sludge particle outlet connected with the high-temperature pyrolysis gasification equipment;

a hot gas inlet of the rotary kiln is connected with a hot gas outlet of the high-temperature pyrolysis gasification equipment through a pipeline;

the first washing device is connected with a washing port arranged on the rotary kiln, and the first washing device is sequentially connected with a second alkali washing device, a second induced draft fan and a dust removal device;

the mud cake particle temporary storage bin is provided with a waste heat inlet, and the waste heat inlet is connected with a waste heat outlet of the high-temperature pyrolysis gasification equipment through a pipeline.

In the above system, the high-temperature pyrolysis gasification apparatus includes:

the device comprises a lifting device, a pyrolysis gasifier, a second water washing device, a high-pressure fan, a second alkali washing device, a dust removal device, a combustible gas storage tank, a secondary combustion chamber and an air supplementing fan; wherein the content of the first and second substances,

the lifting device is connected with a sludge granule outlet of the granulation drying equipment, and an outlet of the lifting device is connected with the pyrolysis gasification furnace;

a washing port arranged on the pyrolysis gasification furnace is connected with a second washing device;

a pyrolysis gas outlet arranged on the pyrolysis gasification furnace is connected with the second combustion chamber through a second alkali washing device, a second dust removal device and a high-pressure fan in sequence;

the second combustion chamber is provided with a hot air outlet and a waste heat outlet, the hot air outlet is connected to the granulation drying equipment through a pipeline, and the waste heat outlet is connected to the granulation drying equipment through an air supplementing fan and a pipeline.

In the above system, the high-temperature pyrolysis gasification apparatus further includes:

and the slag outward transportation device is connected with a slag outlet arranged on the pyrolysis gasifier.

In the system, as the electroosmosis sludge high-dry dehydration equipment is adopted, the materials can be directly extruded into the finished product by electroosmosis and extrusion methods, the granulation without chemical reaction can be realized by adding steam into the dry materials, the energy consumption can be effectively reduced, the process flow is simplified, the problem that the emission pollutes the environment is avoided, and the system is particularly suitable for the granulation of thermosensitive materials.

The embodiment of the utility model provides a sludge comprehensive treatment method adopts foretell sludge comprehensive treatment system, includes following steps:

step 1, conveying the temporarily stored sludge with the water content of 80-83% into an electro-osmosis high-dryness dehydration device, and carrying out electro-osmosis coupling and squeezing treatment to reduce the water content of 80-83% of the sludge to 45-50% of the water content of the sludge to form a dried sludge cake; crushing the dried sludge cake, and adding biomass waste for modification to form modified dried sludge;

step 2, conveying the modified dried sludge obtained in the step 1 into the granulation drying equipment for drying until the water content of the modified dried sludge is lower than 20%; then granulating the dried sludge to prepare fuel rods;

step 3, the fuel rods prepared in the step 2 are conveyed and added into high-temperature pyrolysis gasification equipment, the fuel rods are pyrolyzed to generate combustible gas under the state of anoxic combustion, the combustible gas is subjected to washing and impurity removal treatment and then is ignited, and generated hot gas and waste heat are respectively recycled to the granulation drying equipment to be used as heat source gas; and discharging residues generated by pyrolysis of the high-temperature pyrolysis gasification equipment.

The method further comprises the following steps: and a slag outward transportation step, namely crushing the discharged residues and then transporting the crushed residues outward through a slag outward transportation device. The residues after outward transportation can be recycled, such as being used as landscaping matrix for soil improvement and the like.

For the purpose of understanding, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiment of the utility model provides a sludge integrated processing system is a processing system who organically combines electroosmosis high-dry dehydration + granulation + pyrolysis gasification, and this system includes (see fig. 1):

the device comprises an electroosmosis sludge high-dry dehydration device 100, a granulation drying device 200 and a high-temperature pyrolysis gasification device 300; the structure and the function of each device are as follows:

(10) electroosmosis sludge high-dry dehydration equipment:

the electroosmosis sludge high-dry dehydration equipment is used for coupling electroosmosis and plate-and-frame filter pressing, organically combining a solid-liquid separation technology and the electrochemical property of sludge, and dehydrating by using electric power. By applying a certain direct current voltage to the sludge, the sludge particles and water molecules are separated and moved in opposite polarity directions to dewater, and meanwhile, a certain high pressure is applied, so that the dewatering effect is better, and the time is shortened.

The greatest advantage of the electroosmosis sludge high-dry dehydration is that no chemical conditioner is added, the reduction is realized, and the process system is simple. The sludge treatment method can remove gap water, capillary water, adsorbed water and part of bound water in the sludge, the water content of a sludge cake is less than 40%, and the sludge cake is harmless and kills ascarid eggs and pathogenic microorganisms in the sludge by destroying microbial cell membranes. Finally, energy regeneration, deep removal of sludge moisture, and improvement of the low-grade heat value of the sludge cake, not only self-sustaining incineration, but also recovery of heat energy. The total power consumption of the device is 80-120 kilowatt-hour/ton of sludge, and the sludge with the water content of 80% can be treated into a mud cake with the water content of about 50%.

The sludge crushing mainly has the function of crushing sludge cakes generated by the electroosmosis drying system, crushing the sludge cakes into finer particles and facilitating subsequent drying treatment. In addition, biomass waste (wood chips) is added for modification granulation, and after the modified sludge is dehydrated, the modified sludge is made into a fuel rod pin through a granulator, so that the gas production rate of the sludge is improved, and the subsequent pyrolysis is facilitated.

(20) Granulation drying equipment:

the granulation drying equipment is divided into two parts: drying in a rotary kiln and utilizing hot gas combusted in a secondary combustion chamber; wherein, the equipment uses the rotary kiln as a drying container, and can adopt the existing mature rotary kiln technology; the drying temperature of the rotary kiln is controlled to be about 200 ℃; the sludge is conveyed into the rotary kiln from the kiln head, and when the rotary kiln rotates, the flue gas in the kiln is fully mixed and contacted with the sludge, so that the sludge has a better drying effect;

the sludge heat source gas dried in the rotary kiln enters the kiln tail from a secondary combustion chamber of the high-temperature pyrolysis gasification equipment, the combustible gas is ignited in the secondary combustion chamber, and air is supplemented through an air supplementing fan, so that the combustible gas is ensured to be sufficiently combusted in the secondary combustion chamber. The combustible gas is ignited in the second combustion chamber, so that the problem that the sludge is ignited by flame entering the rotary kiln when the combustible gas is ignited by direct injection can be avoided.

(30) High-temperature pyrolysis gasification equipment:

(301) high-temperature pyrolysis:

firstly, the water content of the treated sludge is reduced to 15%, the treated sludge is directly added into a pyrolysis gasification furnace through a lifting device, a dried sludge combustion rod is added into the pyrolysis gasification furnace from the top of the furnace, is contacted with pyrolysis gas at the temperature of 80-120 ℃ in the descending process, the attached water is continuously removed within 1-2 hours, the water is changed into steam and the pyrolysis gas is discharged out of the furnace, and the sludge is gradually dried.

And secondly, performing dry distillation reaction on the dried sludge combustible substances under the baking of hot gas with the temperature of 200-450 ℃ rising from a part of reaction layer to generate combustible gas such as alkanes (CmHn), carbon monoxide (CO), tar and the like and water vapor (H2O), generating hydrogen chloride (HCl) gas by using chlorine (Cl) elements, generating (H2S) gas by using sulfur (S) elements, and discharging all the gases from the upper part of the furnace body.

Thirdly, the main residues of the sludge after the dry distillation are non-combustible materials such as coke and a small amount of clay, and the sludge is subjected to oxidation-reduction reaction at the high temperature of 800-1000 ℃ under the action of water vapor to generate combustible gases such as carbon monoxide (CO), hydrogen (H2) and the like, and is discharged from the middle part of the furnace body. The main reaction is as follows:

C+O2＝CO2；

C+1/2O2＝CO；

CO2+C＝CO；

C+H2O＝CO+H2；

C+2H2O＝CO2+2H2；

and fourthly, gasifying sludge combustible substances to obtain inorganic slag containing a small amount of fixed carbon, and discharging the inorganic slag from the bottom of the reaction furnace through a special slag discharging mechanism.

(302) Combustible gas treatment:

the combustible gas produced by pyrolysis contains some impurities, and the removal of the impurities is detected to contain the following main impurities: HCl, HCN, H2S, NH3, tar, and the like. Therefore, the tail gas treatment system adopts a combination form that: washing with water, alkaline washing and dedusting. And arranging a second water washing device to reduce the temperature of the combustible gas to 150 ℃. Removing tar and other impurities in the combustible gas; and removing smoke dust in the combustible gas by the dust removal device after the two-stage washing. Thereby obtaining purer combustible gas.

(303) Flue gas treatment:

after the flue gas dried by the sludge is subjected to water washing, alkali washing and dust removal, the flue gas is sucked into a chimney through a draught fan; a silencer is arranged in front of the induced draft fan to reduce the emission noise; the height of the chimney behind the induced draft fan accords with relevant regulations of GB18485-2014 'domestic waste incineration pollution control Standard', and a sampling hole is arranged as required.

The utility model discloses a sludge comprehensive treatment system compares current sludge treatment technique and has following advantage at least:

(1) the municipal sludge with the water content of 80 percent is primarily dried to the water content of 50 percent by using electroosmosis high-pressure drying dehydration. In the whole operation process, no chemical agent is required to be added additionally, so that the sludge reduction is realized, and the secondary pollution is avoided. Then the dried sludge cake is crushed and then modified by adding biomass waste.

(2) The technology of granulation, rotary kiln drying and high-temperature pyrolysis gasification is applied, and combustible gas generated by the sludge pyrolysis system 300 is used for providing heat for the rotary kiln sludge drying system 200, so that energy consumption is saved, energy is saved, and emission is reduced; harmful strains and pathogens in the sludge are killed by a drying technology, and the water content of the sludge is further reduced to be below 20 percent. Then the dried modified sludge is made into fuel rods through a granulator;

(3) the fuel rod is added into the pyrolysis gasification furnace through the lifting device, and the fuel rod is pyrolyzed in the state of oxygen-deficient combustion, the molecular structure of organic matter is comprehensively cracked, and low-molecular organic matter with large area is generated, so that combustible gas is generated. The pyrolysis residual residues can be used as landscaping matrix, and the harmless target and resource utilization of the sludge are realized.

The utility model discloses a processing system, the operation is reliable, and long service life handles 1 ton 80% moisture content mud, and the energy consumption is low to 90kwh, can realize fast that mud moisture content reduces to below 30%, and the mud granulation is dealt with, realizes mud resource utilization. The material manufacturing process of directly extruding the material into the finished product by the extrusion method can be regarded as a granulation process of adding steam into dry materials for carrying out non-chemical reaction, has the advantages of reducing energy consumption, simplifying process flow, avoiding the problem of environmental pollution caused by emissions, is particularly suitable for granulation of thermosensitive materials, and realizes the aims of sludge reduction and resource utilization.

The sludge comprehensive treatment system provided by the embodiment can realize sludge reduction and recycling treatment in a mode of organically combining electroosmosis high-dry dehydration, granulation and high-temperature pyrolysis gasification, and the treatment method comprises the following steps (see fig. 2):

1) firstly, conveying sludge with water content of 80-83% temporarily stored in a sludge temporary storage bin 110 to an electroosmosis high-dry dehydration device 100 through a pump, and reducing the water content of the sludge from 80-83% to 45-50% to form a dried sludge cake by improving electroosmosis coupling pumping pressure and squeezing pressure of the electroosmosis high-dry dehydration device 100;

2) then crushing the dried sludge cake by a crusher of the sludge crushing and conveying device 130, adding biomass waste for modification to form modified dried sludge, and conveying the modified dried sludge to the granulation drying equipment 200 by a shaftless screw conveyor of the sludge crushing and conveying device 130;

3) conveying the modified dried sludge into a rotary kiln 230 of a granulation drying device 200 for drying until the water content of the modified dried sludge is lower than 20%;

4) then, the dried modified sludge is made into fuel rods through a granulator 220;

5) the prepared fuel rod is added into a pyrolysis gasifier 320 through a lifting device 310 of the high-temperature pyrolysis gasification equipment 300, and the fuel rod is pyrolyzed under the state of anoxic combustion, so that the molecular structure of organic matters in the fuel rod is comprehensively cracked to generate large-area low-molecular organic matters, thereby generating combustible gas;

6) the combustible gas is washed by water through a second washing device 330 and conveyed by a high-pressure fan 340, and after a series of treatments, the second alkali washing device 350 removes impurities in the combustible gas, and then the combustible gas enters a second combustion chamber 380 to be ignited for recycling as heat source gas for drying modified sludge in a rotary kiln 230 of the granulation drying equipment 200 and as dry hot gas for a mud cake particle temporary storage bin;

7) in addition, after being crushed, the residues cracked by the pyrolysis gasifier 320 of the high-temperature pyrolysis gasification equipment 300 are discharged out through the slag outward-conveying device 391, and can be recycled, for example, the residues are used as landscaping substrates to improve soil and the like.

The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A sludge comprehensive treatment system is characterized by comprising:

2. The integrated sludge treatment system according to claim 1, wherein the electro-osmotic sludge high-dry dewatering device comprises:

3. The integrated sludge treatment system according to claim 2, wherein the sludge crushing and conveying device comprises:

4. The integrated sludge treatment system according to any one of claims 1 to 3, wherein the granulation drying apparatus comprises:

5. The integrated sludge treatment system according to claim 4, wherein the high-temperature pyrolysis gasification apparatus comprises:

6. The integrated sludge treatment system according to claim 5, wherein the high-temperature pyrolysis gasification apparatus further comprises: