CN212703647U - Cooperative treatment system based on sewage sludge, garbage and excrement residues - Google Patents
Cooperative treatment system based on sewage sludge, garbage and excrement residues Download PDFInfo
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- CN212703647U CN212703647U CN202021601745.0U CN202021601745U CN212703647U CN 212703647 U CN212703647 U CN 212703647U CN 202021601745 U CN202021601745 U CN 202021601745U CN 212703647 U CN212703647 U CN 212703647U
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Abstract
A cooperative treatment system based on sewage sludge, garbage and excrement slag solves the cooperative treatment problem of mixed garbage and excrement slag. The processing system comprises: the device comprises a storage tank, a storage tank sediment grab bucket, a ball mill, a hydraulic separator, a screw conveyor, a damp and hot treatment tank floater grab bucket, a sand pump, a film liquid filter, a shredder, a screw extrusion dehydrator, a drying and carbonizing system, an exhaust fan, a denitrification tank and a washing-biofiltration bed deodorization device. The storage tank sediment grab bucket corresponds with storage tank and ball mill, and damp and hot processing pond floater grab bucket corresponds with damp and hot processing pond and shredder, and ball mill, hydraulic separator, screw conveyer communicate in proper order, and silt pump, film liquid filter, shredder, screw extrusion hydroextractor and stoving carbomorphism system communicate in proper order, and beneficial effect is that, realizes the coprocessing of mud and rubbish, excrement sediment, and processing cost is low, efficient.
Description
Technical Field
The utility model relates to the technical field of municipal solid waste treatment, in particular to a cooperative treatment method and a treatment system based on sewage sludge, garbage and excrement slag.
Background
With the increase of population and the development of cities, garbage (including household garbage, kitchen garbage, fruit and vegetable garbage, greening garbage, decoration garbage, construction garbage and the like) generated in daily life and urban construction of people, sludge generated in sewage treatment, and the yield and the influence on the environment of excrement slag generated in urban septic tanks and livestock and poultry breeding become more and more serious important problems to be solved by people due to proper treatment.
The garbage is characterized by complex components, difficult sorting and difficult disposal.
The sludge is characterized by high water content, high viscosity and difficult disposal.
The manure residues are characterized by high water content, complex components, difficult separation and difficult disposal.
The town sewage treatment plant is responsible for treating town sewage and is characterized by large treatment capacity and proper treatment of generated sludge; the water temperature is low in winter, so that the biochemical treatment is not facilitated; for denitrification, a large amount of an externally purchased carbon source is added.
Because the characteristics of garbage, sludge, excrement slag and town sewage are very different, the independent treatment cost is very high, and if the synergistic treatment is carried out, the advantages can be complemented, the waste can be treated by the waste, the investment and the operation cost are greatly reduced, and the occupied area is greatly reduced.
At present, garbage, sludge, excrement slag and town sewage in China are almost treated respectively, treatment facilities are built respectively, repeated construction is caused, and the advantage of synergistic treatment is not exerted.
The main treatment mode of domestic garbage at present is incineration power generation, stack retting is required to be performed for more than 5 days before incineration to improve the heat value by dehydration, the stack retting is long in time consumption, large in occupied area and poor in effect, leachate is high in separate treatment cost, and metal and inorganic solids in the garbage seriously wear a grate of a garbage incinerator, so that the grate is high in manufacturing cost and needs to be periodically overhauled; the high moisture content of the garbage causes unstable furnace temperature, incomplete incineration and easy secondary pollution, the mixed incineration also causes low incineration efficiency, the investment and the operating cost are increased greatly, and the occupied area and the financial burden are increased.
The kitchen waste is waste formed in the process of living and consumption of residents, mainly comprises rice and flour food residues, fruit and vegetable, animal and vegetable oil, meat and bones and the like, and has the chemical compositions of starch, cellulose, protein, lipid, inorganic salt and the like. The treatment of the kitchen waste needs the processes of impurity removal, crushing, dehydration and the like, and the existing separation equipment is relatively complex, high in disposal rate and poor in separation effect because the kitchen waste contains soft and hard impurities such as metal, bamboo wood, plastic, paper, fabric and the like. The kitchen waste is usually treated by adopting an anaerobic digestion technology, but the treatment efficiency is very low and the operation cost is higher due to the unsatisfactory pretreatment technology. The existing kitchen waste treatment plants adopt a receiving hopper to receive waste sent by a waste transport vehicle, and then utilize an inclined screw at the bottom of the receiving hopper to convey the waste to treatment equipment at a constant speed; the receiving hopper is small in size and cannot store more garbage, and the dispatching efficiency of the garbage transport vehicle is affected.
The main treatment mode of sludge produced by urban sewage treatment plants at present is drying and incineration; drying requires energy consumption, has high cost, generates a large amount of high-temperature odor and is difficult to treat; the sludge is sticky and fine, and the filter pressing and dehydration are difficult. After drying, the waste water is transported to outside for incineration treatment, thereby increasing transportation cost and secondary pollution risk.
Decoration garbage and construction garbage are mostly separated by a dry method at present, a large amount of dust is generated, and components such as soil, bamboo wood, plastics, metal and the like in the decoration garbage and the construction garbage are difficult to be thoroughly separated, so that the quality of separated products is not high, and the recycling is influenced. The utilization of high-heat-value components such as bamboo and wood, plastics and the like is also problematic.
Disclosure of Invention
In order to overcome the defects of separate treatment of garbage, sludge, excrement slag and town sewage, the invention discloses a cooperative treatment method and a treatment system based on sewage sludge, garbage and excrement slag, which utilize different characteristics, interaction modification and cooperative treatment of the sewage sludge, the garbage and the excrement slag to complete treatment of different components at one time, can obviously improve the treatment efficiency and greatly reduce the occupied area, investment and operating cost.
The utility model discloses the technical scheme who realizes that the purpose adopts is:
a sewage sludge and garbage and manure residue based cooperative treatment system comprises: the device comprises a storage tank, a storage tank sediment travelling grab bucket, a ball mill, a hydraulic separator, a screw conveyor, a damp and heat treatment tank floater travelling grab bucket, a sand pump, a film liquid filter, a shredder, a screw extrusion dehydrator, a drying and carbonizing system, an exhaust fan, a denitrification tank, a damp and heat odor closed space and a washing-biofiltration bed deodorization device.
The storage tank and the damp-heat treatment tank are of adjacent open structures, an upper partition wall and a lower partition wall are arranged between the storage tank and the damp-heat treatment tank, the lower partition wall is arranged below the water surface between the storage tank and the damp-heat treatment tank to form an isolation structure below the water surface between the storage tank and the damp-heat treatment tank, one end of the upper partition wall extends into the water of the storage tank, the other end of the wet-heat treatment tank extends to the water surface of the wet-heat treatment tank, an air channel communicated with the outside is reserved, a wet-heat odor closed space is formed above the water surface of the wet-heat treatment tank by an upper partition wall, a floater underwater moving channel communicated with the storage tank and the wet-heat treatment tank is reserved between the upper partition wall and a lower partition wall, the wet-heat odor closed space is communicated with the outside through a washing-biological filter bed deodorization device and an exhaust fan pipeline, and the washing-biological filter bed deodorization device is communicated with a sewage treatment denitrification tank pipeline; the storage tank sediment travelling crane grab bucket and the damp and hot treatment tank floater travelling crane grab bucket are respectively arranged above the storage tank and the damp and hot treatment tank.
The storage tank sediment travelling crane grab bucket and the travelling crane form a structure capable of moving horizontally and vertically between the storage tank and the feed inlet of the ball mill.
The grab bucket of the floating object travelling crane and the travelling crane in the damp and heat treatment pool form a structure which can move horizontally and vertically between the damp and heat treatment pool and the feed inlet of the shredder.
The ball milling discharge port of the ball mill is communicated with a hydraulic separator, and the overflow discharge port of fine sand and slurry which can move along with water flow of the hydraulic separator is communicated with a wet heat treatment pool through a pipeline.
The feed inlet of the screw conveyor is communicated with the bottom of the hydraulic separator, and the discharge outlet of the screw conveyor is communicated with the feed inlet of the ball mill.
The silt pump set up in damp and hot treatment tank bottom minimum, the outlet of silt pump through filter governing valve and film liquid filter's pan feeding mouth intercommunication, silt pump export still through ball mill governing valve and ball-milling feed inlet intercommunication, film liquid filter's filter mud discharge gate and shredder pan feeding mouth intercommunication, film liquid filter's filtrating discharge gate and sewage treatment denitrification tank intercommunication.
The discharge gate of shredder and the pan feeding mouth intercommunication of screw extrusion hydroextractor, the dry residue discharge gate of screw extrusion hydroextractor and the pan feeding mouth intercommunication of stoving carbomorphism system, the liquid outlet and the damp and hot processing pond intercommunication of squeezing of screw extrusion hydroextractor.
And a high-temperature tail gas outlet of the drying and carbonizing system is communicated to the position below the water surface of the damp-heat treatment pool through a hot gas fan pipeline.
The utility model has the advantages that: the problems of difficult separation of garbage/excrement slag, difficult modification and dehydration of sludge, low water temperature of a sewage treatment plant and the need of supplementing an externally purchased denitrification carbon source are solved, energy and substances are comprehensively utilized, different components interact to modify, and the treatment of waste by waste and cooperative treatment of garbage, sludge, excrement slag and sewage are realized. Low treatment cost and high efficiency.
The present invention will be described in detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic view of the system of the present invention.
In the attached figure 1, 1 is a storage tank, 2 is a storage tank sediment traveling grab bucket, and 3. The device comprises a ball mill, 3-1 parts of a ball mill feeding port, 3-2 parts of a ball mill discharging port, 4 parts of a hydraulic separator, 4-1 parts of a fine sand and slurry overflow discharging port, 5 parts of a screw conveyor, 6 parts of a damp and hot treatment tank, 6-1 parts of an upper isolation wall, 6-2 parts of a lower isolation wall, 7 parts of a damp and hot treatment tank floater travelling grab bucket, 8 parts of a sand pump, 8-1 parts of a filter adjusting valve, 8-2 parts of a ball mill adjusting valve, 9 parts of a thin film liquid filter, 10 parts of a shredder, 10-1 parts of a shredder feeding port, 11 parts of a screw extrusion dehydrator, 12 parts of a drying and carbonizing system, 13-1 parts of a hot air blower, 13-2 parts of an exhaust fan, 14 parts of a sewage treatment denitrification tank, 15 parts of a damp and hot odor closed space, 16 parts of a washing-biological filter bed deodorization device and 17 parts of a.
Detailed Description
Referring to the attached drawing, the system is based on a cooperative treatment system of sewage sludge, garbage and excrement slag.
The system comprises: the device comprises a storage tank 1, a storage tank sediment travelling grab bucket 2, a ball mill 3, a hydraulic separator 4, a spiral conveyer 5, a damp and hot treatment tank 6, a damp and hot treatment tank floater travelling grab bucket 7, a sand pump 8, a film liquid filter 9, a shredder 10, a spiral extrusion dehydrator 11, a drying and carbonizing system 12, a hot air fan 13-1, an exhaust fan 13-2, a denitrification tank 14, a damp and hot odor closed space 15 and a washing-biological filter bed deodorization device 16.
The storage tank 1 and the damp-heat treatment tank 6 are of an open structure which is adjacently arranged, an upper partition wall 6-1 and a lower partition wall 6-2 are arranged between the storage tank 1 and the damp-heat treatment tank 6, the lower partition wall 6-2 is arranged below the water surface between the storage tank 1 and the damp-heat treatment tank 6 to form an isolation structure below the water surface between the storage tank 1 and the damp-heat treatment tank 6, two ends of the upper partition wall 6-1 respectively extend to the water of the storage tank 1 and the water surface of the damp-heat treatment tank 6 to reserve a gas channel communicated with the outside, a damp-heat odor closed space 15 is formed above the damp-heat treatment tank 6 by the upper partition wall 6-1, a floating object underwater moving channel communicated with the storage tank 1 and the damp-heat treatment tank 6 is reserved between the upper partition wall 6-1 and the lower partition wall 6-2, and the damp-heat odor closed space 15 is formed by a washing-biological filter bed deodorization device 16, The exhaust fan 13-2 is communicated with an outdoor pipeline, and the washing-biological filter bed deodorization equipment 16 is communicated with a sewage treatment denitrification tank 14 pipeline.
When in work: the sludge and the garbage and/or the excrement slag are mixed and floated in the water in the storage tank 1 to generate flotage, suspended slurry and sediment which float on the water surface of the storage tank 1 and sediment which is deposited at the bottom of the storage tank 1. After the floating materials on the water surface of the storage tank 1 are accumulated to a certain thickness, the floating materials and the mud float together and enter the adjacent damp and heat treatment tank 6 through an underwater U-shaped moving channel reserved between the upper separation wall 6-1 and the lower separation wall 6-2. The lower partition wall 6-1 is provided to prevent the sediment at the bottom of the storage tank 1 from entering the wet heat treatment tank 6 for garbage. The upper isolation wall 6-1 is arranged for prolonging the time for the flotage to enter the adjacent damp heat treatment pool 6, so that heavy objects such as stones, metal and the like are precipitated in the storage pool 1 as much as possible, meanwhile, the upper isolation wall 6-1 forms a relatively closed damp heat odor closed space 15 at the upper part of the damp heat treatment pool 6 (only a gas channel communicated with the outside is reserved on the water surface, so that surrounding odor can be sucked), so that the damp heat odor and the surrounding odor can be collected and then enter the washing-biological filter bed deodorization equipment 16, and the damp heat odor can be prevented from diffusing to the surrounding and can be treated simultaneously.
The storage tank sediment travelling crane grab bucket 2 and the damp and heat treatment tank floater travelling crane grab bucket 7 are respectively arranged above the storage tank 1 and the damp and heat treatment tank 6.
When the worker works: the storage tank sediment travelling grab bucket 2 and the wet and heat treatment tank floater travelling grab bucket 7 are used for grabbing sediments in the storage tank 1 and floaters in the garbage wet and heat treatment tank 6 and sending the sediments into the ball mill 3 and the shredder 10 in the next process.
The storage tank sediment traveling grab 2 is of a structure capable of moving horizontally and vertically between the storage tank 1 and a ball mill feed port 3-1 of the ball mill 3.
The floating object travelling grab bucket 7 of the damp and hot treatment pool forms a structure which can move horizontally and vertically between the damp and hot treatment pool 6 and the feeding hole 10-1 of the shredder.
The ball milling discharge port 3-2 of the ball mill 3 is communicated with a hydraulic separator 4, and the fine sand and slurry overflow discharge port 4-1 of the hydraulic separator 4, which can move along with water flow, is communicated with a damp and heat treatment pool 6 through a pipeline.
The feed inlet of the spiral conveyor 5 is communicated with the bottom of the hydraulic separator 4, and the discharge outlet of the inclined spiral conveyor 5 is communicated with the feed inlet 3-1 of the ball mill.
When in work: the storage tank sediment traveling grab bucket 2 sends sediment at the bottom of the storage tank 1 to the ball mill 3, the ball mill 3 crushes sediment (such as masonry, glass, ceramics, metal and the like) at the bottom of the storage tank 1, the crushed sediment is separated by the hydraulic separator 4 to generate large-particle sediment and fine sand and slurry which can move along with water flow, the large-particle sediment is sent back to the ball mill 3 by the screw conveyor 5 to be continuously crushed, and the fine sand and slurry which can move along with the water flow enter the wet heat treatment tank 6 through pipelines.
The floating objects in the damp and hot treatment pool are sent into a shredder 10 by a grab bucket 7 for shredding.
The sludge pump 8 is arranged at the lowest point of the bottom of the damp and heat treatment pool 6, the outlet of the sludge pump 8 is communicated with the feeding port of the membrane liquid filter 9 through the filter regulating valve 8-1, the outlet of the sludge pump 8 is communicated with the feeding port 3-1 of the ball mill through the ball mill regulating valve 8-2, the sludge filtering discharge port of the membrane liquid filter 9 is communicated with the feeding port 10-1 of the shredder, and the filtrate discharge port of the membrane liquid filter 9 is communicated with the sewage treatment denitrification pool 14.
When in work: and (3) starting a sand pump 8, pumping part of fine sand and slurry subjected to damp-heat treatment at the bottom of the damp-heat treatment tank 6 into a membrane liquid filter 9 through a filter regulating valve 8-1 for filtering, and allowing formed filter mud to enter a shredder 10 through a discharge hole of the membrane liquid filter 9 to be treated together with floaters in the damp-heat treatment tank 6.
And (3) a sand pump 8 is started, and simultaneously, fine sand and slurry after the wet-heat treatment at the bottom of the wet-heat treatment pool 6 are pumped into the ball mill 3 through a ball mill regulating valve 8-2 to be used as grinding fluid and a hydraulic separator to be used as hydraulic separation fluid.
The water levels of the material storage tank 1 and the wet heat treatment tank 6 can be kept constant by adjusting the filter adjusting valve 8-1.
The filtrate produced by the membrane liquid filter 9 enters a sewage treatment denitrification pool 14 for treatment.
The discharge port of the shredder 10 is communicated with the feed port of the screw extrusion dehydrator 11, the dry slag discharge port of the screw extrusion dehydrator 11 is communicated with the feed port of the drying and carbonizing system 12, and the squeezing liquid outlet of the screw extrusion dehydrator 11 is communicated with the damp and heat treatment tank 6.
When in work: the mixture treated by the shredder 10 enters a screw extrusion dehydrator 11 for dehydration.
The pressed liquid extruded by the screw extrusion dehydrator 11 flows back to the wet heat treatment tank 6. The dry slag generated after the dehydration treatment of the screw extrusion dehydrator 11 enters a drying and carbonizing system 12 for drying and carbonizing treatment.
The high-temperature tail gas outlet of the drying and carbonizing system 12 is communicated to the position below the liquid level of the damp and heat treatment pool 6 through a hot gas fan 13-1 pipeline.
When in work: high-temperature tail gas generated in the working process of the drying and carbonizing system 12 enters the position below the liquid level of the damp-heat treatment pool 6 through the hot air fan 13-1 and serves as a heat source for damp-heat treatment of sludge, garbage and excrement residues, and comprehensive utilization of energy is achieved.
The embodiment of the utility model provides an in, for the granularity after guaranteeing the material shredding, shredder 10 be unipolar, sieve mesh diameter is 30 millimeters's shredder.
The embodiment of the utility model provides an in, for the concentrated sludge of the high moisture content that the adaptation was handled sewage treatment and is produced, the concentrated sludge pump income pipe 17 intercommunication that the intercommunication pipeline below the 6 surfaces of water in high-temperature gas and damp heat treatment pond produced with sewage treatment, make high-temperature gas and concentrated sludge directly mix, wet heat treatment in the pipeline.
In the embodiment of the utility model, the concentrated sludge pump outlet pipe 17 produced by the sewage treatment plant is communicated to the communicating pipe below the water level of the damp-heat treatment tank 6 through the hot air fan 13-1 of the air outlet pipeline 13-1.
The utility model discloses based on sewage sludge and rubbish, the implementation ground of coprocessing system of excrement sediment, the best scheme is that the construction is in municipal sewage treatment plant, and its advantage lies in:
1. be convenient for in time handle the mud that sewage treatment produced, reduce outward transport and handle the expense and the environmental pollution risk that produce, directly send into through the mud pipeline the utility model discloses a storage tank or high-temperature gas pipeline mix, wet heat treatment.
2. The existing denitrification treatment system and sewage and odor treatment system of the urban sewage treatment plant can be utilized: the damp and hot odor (reaching 100 ℃, main pollutants are volatile fatty acid which is a carbon source) generated by the damp and hot treatment tank and the odor from the periphery are mixed in the damp and hot odor closed space and then pumped into a washing-biological filter bed deodorization device by an exhaust fan through a pipeline, the mixture is firstly fully contacted and washed with the denitrification liquid from the urban sewage treatment plant in a carbon starvation state, the heat and the pollutants are absorbed by the denitrification liquid, the liquid obtains the carbon source, the gas is cooled and purified, and then the gas enters the biological filter bed to be further purified and discharged after reaching the standard.
3. Reducing the occupied area and repeating the construction.
The utility model discloses realize the coprocessing of sewage sludge and rubbish, excrement sediment by following step:
step 1, mixing and floating sludge and garbage and/or excrement slag in water in a storage tank to generate flotage, suspended slurry and sediment which are floated on the water surface of the storage tank, wherein the flotage is accumulated to a certain thickness and then floats together with the slurry from the water surface of the storage tank through a U-shaped channel to enter an adjacent damp-heat treatment tank;
wherein, the weight percentage of the sludge is lower than 50 percent according to 80 percent of water content, and the rest is garbage and/or excrement residue;
the purpose of the mixed treatment of the sludge, the garbage and the excrement residue is to modify different materials so as to be beneficial to subsequent treatment, and particularly, the sewage sludge is difficult to be subjected to separate filter pressing and dehydration due to large viscosity and containing a large amount of cell binding water. In the step, the water permeability of the sludge during filter-pressing dehydration can be improved by doping impurities such as fibers in the garbage and the excrement residues, so that the filter-pressing dehydration efficiency is improved. The impurities such as fiber in the garbage and the excrement residue can also play a role of a filter aid to reduce the concentration of the squeezing liquid, so that a continuously running spiral extrusion dehydrator without filter cloth can be adopted to squeeze and dewater the mixture of the sludge, the garbage and the excrement residue, and an intermittently running plate-and-frame filter press is replaced.
Meanwhile, in the step, light objects (such as plastics, bamboo wood, grease, partial food wastes and the like) float on the water surface through flotation, heavy objects (such as masonry, glass, ceramics, metal and the like) sink at the bottom of the pool, and a part of substances are dissolved or suspended in water to form slurry.
The purpose of limiting the sludge content is to give the mixture good extrusion dewatering properties.
metals (mainly iron and aluminum) are broken down and corroded in the ball mill to chemically react with pollutants which are difficult to decompose in water, and the metals themselves become water treatment agents.
The large-particle sediment is carried out by an inclined screw conveyer at the bottom of the hydraulic separator and sent back to the ball mill for recycling treatment.
The fine sand and the slurry which can move along with the water flow overflow into a damp and hot treatment pool for treatment.
And 3, treating the large-particle precipitate generated in the step 2 and the fine sand and slurry which can move along with the water flow:
circulating the large-particle precipitate generated in the step 2 to the step 2 for treatment;
and (2) sending the fine sand and the slurry which are generated in the step (2) and can move along with the water flow into an adjacent damp and heat treatment pool.
In this step, the sediment at the bottom of the storage tank is lifted by a grab bucket connected to a traveling crane and sent into a ball mill for crushing.
And 4, heating the slurry, the floating objects, the fine sand and the slurry which enter the damp-heat treatment pool in the steps 1 and 3 and can move along with water flow to 70-100 ℃ by using high-temperature gas, and preserving heat for more than 1-2 hours.
High-temperature gas is sent below the water surface of the damp-heat treatment pool by a high-pressure hot air fan to form an 'impact water bath' state, the gas and the liquid are fully contacted, heat, moisture and pollutants in the gas are absorbed by the liquid, the surface temperature of the liquid can reach 100 ℃, and a 'damp-heat treatment' effect is generated on substances in the liquid; because the higher the water temperature, the lower the specific gravity, the higher the upper temperature of the liquid than the lower temperature, the better moist heat treatment can be obtained for the floating objects, and the energy can be saved; in the damp and hot treatment pool, the materials slowly flow from the feed inlet to the discharge outlet, and the sufficient damp and hot treatment is obtained. The wet heat treatment can break the wall of biological cells in the material, change the combined water into free water, accelerate the decomposition of pollutants and prepare for the next treatment.
And 5, respectively treating the floating objects in the damp and hot treatment pool after the damp and hot treatment in the step 4, and fine sand and slurry which can move along with water flow:
firstly, conveying the floating objects in the damp and hot treatment tank into a shredder for shredding and then conveying the floating objects into a spiral extrusion dehydrator;
filtering a part of fine sand and slurry at the bottom of the damp and hot treatment tank by a thin film liquid filter, feeding the formed filtered slurry and floating materials in the damp and hot treatment tank into a shredder for shredding, and then feeding the shredded filtered slurry into a spiral extrusion dehydrator; the filtrate formed by filtering the membrane liquid filter is sent into a denitrification tank of an urban sewage treatment plant for treatment; and part of the fine sand and the slurry at the bottom of the damp-heat treatment tank are returned to the ball mill as grinding liquid and the hydraulic separator as hydraulic separation liquid.
In the step, a grab bucket connected to a travelling crane is used for sending floating materials in a damp and hot treatment pool into a shredder (a discharge hole of the shredder is provided with a sieve plate, and the diameter of the sieve hole is 30 mm) for shredding, then the floating materials enter a spiral extrusion dehydrator for squeezing and dehydrating, squeezed liquid flows back to the damp and hot treatment pool, and formed dry slag is sent into a drying and carbonizing system to be made into carbon for recycling; the bottom of a discharge port of the damp and hot treatment tank is the lowest part of the tank, the temperature can reach 70 ℃, mud and sand are accumulated in the tank, the mud and sand are pumped out by a mud and sand pump and are sent to a film liquid filter, suspended matters are filtered to form filter mud, the filter mud enters a shredder, and large materials in the filter mud are shredded; most of pollutants in the filtrate are small molecular organic compounds, are easy to carry out biochemical treatment and have higher temperature, and the pollutants are sent into a denitrification tank of an urban sewage treatment plant as carbon sources for dilution and cooperative treatment, so that the carbon sources purchased outside can be saved, the temperature of the sewage is increased, the biochemical treatment is facilitated, and the treatment cost of the filtrate is greatly reduced.
And part of fine sand and slurry at the bottom of the damp and hot treatment tank reflows to the ball mill to be used as grinding liquid and the hydraulic separator to be used as hydraulic separation liquid, and the ball mill and the hydraulic separator also play a role in aerobic aeration treatment on the liquid in the ball mill and the hydraulic separator during working.
And 6, drying and carbonizing the dry slag formed by extrusion and dehydration in the step 5.
The drying and carbonization are as follows: the materials are dried and then are subjected to anaerobic carbonization to generate pyrolysis gas; the pyrolysis gas is burnt to generate high-temperature flue gas for carbonization and drying, and the high-temperature flue gas is converted into high-temperature tail gas (high-temperature high-humidity odor).
The dry slag is dried and carbonized, so that the reduction, harmlessness and reclamation of the sludge, garbage and manure slag treatment are realized.
And 7, sending the damp and hot odor generated by the damp and hot treatment tank and the odor generated around the damp and hot treatment tank into washing-biological filter bed deodorization equipment, fully contacting and washing with denitrification liquid from the urban sewage treatment plant, absorbing heat and pollutants (mainly serving as a carbon source for sewage treatment denitrification reaction) by the denitrification liquid, further purifying by using the biological filter bed to reach the standard, then discharging the purified denitrification liquid, and returning the denitrification liquid absorbing heat and pollutants to a denitrification tank of the urban sewage treatment plant for continuous treatment.
Claims (3)
1. The utility model provides a coprocessing system based on sewage sludge and rubbish, excrement sediment which characterized in that:
the system comprises: the device comprises a storage tank (1), a storage tank sediment travelling grab bucket (2), a ball mill (3), a hydraulic separator (4), a spiral conveyor (5), a damp and hot treatment tank (6), a damp and hot treatment tank floating object travelling grab bucket (7), a sand pump (8), a thin film liquid filter (9), a shredder (10), a spiral extrusion dehydrator (11), a drying and carbonizing system (12), a hot air fan (13-1), an exhaust fan (13-2), a sewage treatment denitrification tank (14), a damp and hot odor closed space (15) and a washing-biological filter bed deodorization device (16);
the storage tank (1) and the damp and heat treatment tank (6) are of an open structure which is adjacently arranged, an upper partition wall (6-1) and a lower partition wall (6-2) are arranged between the storage tank (1) and the damp and heat treatment tank (6), the lower partition wall (6-2) is arranged below the water surface between the storage tank (1) and the damp and heat treatment tank (6) to form a partition structure below the water surface between the storage tank (1) and the damp and heat treatment tank (6), one end of the upper partition wall (6-1) extends into the water of the storage tank (1), the other end of the upper partition wall extends above the water surface of the damp and heat treatment tank (6) to leave an air channel communicated with the outside, the upper partition wall (6-1) forms a damp and heat odor closed space (15) above the water surface of the damp and heat treatment tank (6), and floaters communicated with the storage tank (1) and the damp and heat treatment tank (6) are left between the upper partition wall (6-1) and the lower partition wall (6-2) to move underwater to communicate with the The wet and hot odor closed space (15) is communicated with the outside through pipelines of a washing-biological filter bed deodorization device (16) and an exhaust fan (13-2), and the washing-biological filter bed deodorization device (16) is communicated with a sewage treatment denitrification pool (14) through a pipeline;
the storage tank sediment travelling crane grab bucket (2) and the wet heat treatment tank floater travelling crane grab bucket (7) are respectively arranged above the storage tank (1) and the wet heat treatment tank (6);
the storage tank sediment traveling grab bucket (2) forms a structure capable of moving horizontally and vertically between the storage tank (1) and a ball mill feeding port (3-1) of the ball mill (3);
the floating object travelling grab bucket (7) of the damp and hot treatment pool forms a structure which can move horizontally and vertically between the damp and hot treatment pool (6) and the feed inlet (10-1) of the shredder (10);
a ball milling discharge port (3-2) of the ball mill (3) is communicated with a hydraulic separator (4), and a fine sand and slurry overflow discharge port (4-1) of the hydraulic separator (4) is communicated with a damp and hot treatment pool (6) through a pipeline;
the feeding end of the spiral conveyor (5) is communicated with the bottom of the hydraulic separator (4), and the discharging end of the spiral conveyor (5) is communicated with the feeding port (3-1) of the ball mill;
the sludge pump (8) is arranged at the bottom of the damp and hot treatment tank (6), the outlet of the sludge pump (8) is communicated with the feeding port of the membrane liquid filter (9) through a filter regulating valve (8-1), the outlet of the sludge pump (8) is simultaneously communicated with the feeding port (3-1) of the ball mill through a ball mill regulating valve (8-2), the sludge filtering discharge port of the membrane liquid filter (9) is communicated with the feeding port (10-1) of the shredder, and the filtrate discharge port of the membrane liquid filter (9) is communicated with the sewage treatment denitrification tank (14);
a discharge port of the shredder (10) is communicated with a feed port of the spiral extrusion dehydrator (11), a dry slag discharge port of the spiral extrusion dehydrator (11) is communicated with a feed port of the drying and carbonizing system (12), and a squeezed liquid outlet of the spiral extrusion dehydrator (11) is communicated with the damp and heat treatment pool (6);
the high-temperature tail gas outlet of the drying and carbonizing system (12) is communicated to the position below the water surface of the damp and heat treatment pool (6) through a hot gas fan (13-1) pipeline.
2. The sewage sludge and garbage and manure residue based cooperative treatment system according to claim 1, wherein: the shredder (10) is a single-shaft shredder with 30 mm sieve pore diameter.
3. The system of claim 1 or 2, wherein the system is based on sewage sludge, garbage and manure residues, and comprises: the concentrated sludge pump outlet pipe (17) produced by the sewage treatment plant is communicated to a communicating pipe below the water level of the damp-heat treatment tank (6) through the hot air fan (13-1) of the air outlet pipeline of the hot air fan (13-1).
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| CN202021601745.0U CN212703647U (en) | 2020-08-04 | 2020-08-04 | Cooperative treatment system based on sewage sludge, garbage and excrement residues |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111774415A (en) * | 2020-08-04 | 2020-10-16 | 第一环保（深圳）股份有限公司 | Sewage sludge, garbage and excrement slag based co-treatment method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111774415A (en) * | 2020-08-04 | 2020-10-16 | 第一环保（深圳）股份有限公司 | Sewage sludge, garbage and excrement slag based co-treatment method and system |
| CN111774415B (en) * | 2020-08-04 | 2023-08-18 | 第一环保（深圳）股份有限公司 | Cooperative treatment method and treatment system based on sewage sludge, garbage and manure |
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