CN211814101U - Sludge drying system - Google Patents
Sludge drying system Download PDFInfo
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- CN211814101U CN211814101U CN201921933113.1U CN201921933113U CN211814101U CN 211814101 U CN211814101 U CN 211814101U CN 201921933113 U CN201921933113 U CN 201921933113U CN 211814101 U CN211814101 U CN 211814101U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The utility model relates to a sludge drying system, which is characterized by comprising a wet sludge storage system, a sludge drying and waste steam condensing and heat recovery system and a sludge granulating and conveying system which are connected into a whole; the sludge drying and waste steam condensing and heat recovering system comprises a dryer and a waste steam condensing and heat recovering system; the dryer is connected with the waste steam condensation and heat recovery system, the dryer condensed water collection system and the sludge granulation and conveying system; the waste steam condensation and heat recovery system comprises a dryer waste gas circulation pipeline system and a cooling water pipeline system, wherein the dryer waste gas is hot water generated in the sludge drying process of the dryer. The drying system of the application utilizes the heat generated by the waste gas of the dryer, thereby saving energy; meanwhile, the dried sludge is made into particles, so that the combustion is convenient, and the combustion efficiency is improved.
Description
Technical Field
The utility model relates to a sludge drying system belongs to sludge treatment technical field.
Background
The sludge discharge problem of the urban sewage treatment plant in China is very prominent every year in the areas with high urbanization level in China. Therefore, nowadays, social development pays more attention to resource-saving society and the improvement of the overall quality of ecological environment, environmental problems are mentioned to a new history height, and sludge disposal becomes one of the main attack directions of environmental treatment.
At present, in the main methods for sludge treatment and disposal in China, the land utilization of sludge accounts for about 44.8%, land landfill accounts for about 31%, other disposal accounts for about 10.5%, the disposal does not account for about 13.7%, and the sludge treatment and disposal are in a serious lag state. Sludge is a byproduct of sewage treatment in sewage treatment plants, and is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids and the like. The sludge is mainly characterized by high water content (the water content of common wet sludge is more than 96%, the water content of dewatered sludge is about 80%), high organic matter content, easy decomposition and stink generation, fine particles, small specific gravity, colloidal liquid state, thick matter between liquid and solid, and can be transported by a pump, but the sludge is difficult to carry out solid-liquid separation by sedimentation and is difficult to air naturally. If the sludge is not properly treated, the sludge has great influence on the surrounding ecological environment and human health, and the sludge mainly shows the following aspects: the influence on the atmospheric environment mainly includes the influence on the ambient atmospheric environment of a sewage treatment plant by sludge dewatering and sludge stacking and the influence on the atmospheric environment along the way during sludge outward transportation. Secondly, the influence on the surface water environment and the underground water environment, the dehydrated sludge has poor water permeability and is easy to lose after becoming slurry when meeting water. The sludge flows into surface water along with rainwater, and the surface water environment is easily polluted. Leachate is easily generated in the sludge accumulation process, and the sludge leachate carries soluble components in sludge to permeate underground, so that the pollution of underground water is caused. And thirdly, the influence on environmental sanitation is that the dewatered sludge is mainly remains and decomposers of microorganisms, contains intermediates of various pathogens and pathogenic substances, and the substances are spread by mosquitoes and flies and water sources to further harm the health of human bodies.
In the existing sludge treatment process, the energy consumption is high, and the combustion efficiency of the dried sludge is very low.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sludge drying system for solving the problem of existing sludge treatment technology.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a sludge drying system is characterized by comprising a wet sludge storage system, a sludge drying and waste steam condensing and heat recovery system and a sludge granulating and conveying system which are connected into a whole;
the sludge drying and waste steam condensing and heat recovering system comprises a dryer and a waste steam condensing and heat recovering system;
the dryer is connected with the waste steam condensation and heat recovery system, the dryer condensed water collection system and the sludge granulation and conveying system;
the waste steam condensation and heat recovery system comprises a dryer waste gas circulation pipeline system and a cooling water pipeline system, wherein the dryer waste gas is hot water generated in the sludge drying process of the dryer.
On the basis of the technical scheme, the utility model discloses a reach the convenience of use and the stability of equipment, can also make following improvement to foretell technical scheme:
furthermore, the dryer waste gas circulation pipeline system is formed by sequentially connecting a cyclone dust collector, a primary heat exchanger, a secondary heat exchanger and a sewage storage tank through pipelines;
the cooling water pipeline system comprises a primary heat exchanger cooling water pipeline system and a secondary heat exchanger cooling water pipeline system; the cooling water pipeline system of the primary heat exchanger is characterized in that a condensation water port of a steam turbine is connected with the primary heat exchanger through a pipeline, and the primary heat exchanger is connected with a boiler deaerator through a pipeline;
the cooling water pipeline system of the secondary heat exchanger connects the cooling tower and the secondary heat exchanger into a circulating system, a cooling water pool under the cooling tower is connected with the secondary heat exchanger through a pipeline and a cooling circulating water pump on the pipeline, the secondary heat exchanger is connected with the cooling tower through a pipeline, a water pipe on a water outlet of the cooling circulating water pump is also connected with a tertiary heat exchanger, and the tertiary heat exchanger is also connected to a pipeline for connecting the secondary heat exchanger and the cooling tower through a pipeline;
a condensate outlet of the dryer is connected with a sewage well, a condensate water storage tank or a boiler deaerator through a pipeline, and the condensate water storage tank is communicated with the boiler deaerator through a high-temperature condensate water lift pump;
the sewage storage tank is also connected with a spraying system, the spraying system comprises a spraying water pump, the water inlet end of the spraying water pump is connected with the sewage storage tank through a pipeline, the water outlet end of the spraying water pump is connected with a primary spraying device on the primary heat exchanger and a secondary spraying device of the secondary heat exchanger through a pipeline, and the spraying water pump is also communicated with a pipeline of a dryer waste gas outlet; the sewage storage tank is connected with the three-stage heat exchanger through a pipeline and a sewage draining pump on the pipeline; the third-stage heat exchanger is connected with a sewage adjusting tank through a pipeline; the bottom of the cyclone dust collector (2.2) is provided with a star-shaped discharge valve which is connected with a dry sludge horizontal scraper conveyor.
Further, the primary heat exchanger is a horizontal heat exchanger with a hump U-shaped pipe; the second-stage heat exchanger is a horizontal heat exchanger of a hump straight pipe, and the third-stage heat exchanger is a tubular vertical heat exchanger.
Further, the sewage water storage tank be connected the frequency conversion draught fan, the frequency conversion draught fan is connected the garbage incinerator primary air fan.
Furthermore, a first-stage heat exchanger bypass pipeline is arranged at the first-stage heat exchanger, two ends of the first-stage heat exchanger bypass pipeline are respectively connected to the waste gas inlet pipe and the waste gas outlet pipe of the first-stage heat exchanger, and the first-stage heat exchanger bypass pipeline and the waste gas inlet pipe and the waste gas outlet pipe of the first-stage heat exchanger are respectively provided with a control valve.
Furthermore, a sewage meter is arranged on a pipeline between the three-stage heat exchanger and the sewage regulating tank, and a sewage meter bypass pipeline is arranged at the sewage meter.
Furthermore, the secondary heat exchanger and the tertiary heat exchanger are connected in parallel with a cooling water pipeline system of the secondary heat exchanger.
Furthermore, a tee joint A is arranged on a pipeline between the dryer and the cyclone dust collector, and the tee joint A is provided with a pipeline connected with the primary heat exchanger.
Furthermore, the air inlet of the main shaft of the dryer is connected with a tee joint on the steam inlet pipe through a pipeline, the other opening of the tee joint is connected with the air inlet of the jacket of the dryer after being connected with the cyclone dust collector through a pipeline, and bypass pipelines provided with control valves are arranged on the steam pipelines on the two sides of the cyclone dust collector. The steam pipe on the cyclone dust collector is coiled on the outer wall of the cyclone dust collector, and the steam heating function at the cyclone dust collector is as follows: the steam pipe is coiled on the outer side of the cyclone dust collector to heat the dust collector, so that the waste steam is prevented from being precooled and condensed into water mist or water drops adhered to the dust collector
Furthermore, a condensed water outlet of the dryer comprises a jacket water outlet and a main shaft water outlet; the pipeline of the condensed water outlet of the jacket and the water outlet of the main shaft is connected with a condensed liquid water storage tank through a tee joint.
Further, the condensate water storage tank is provided with a condensate water storage tank bypass pipeline, the condensate water storage tank bypass pipeline is communicated with the boiler deaerator and the dryer condensate water pipeline, and the condensate water storage tank bypass pipeline is provided with a control valve.
After wet sludge is subjected to heat exchange and heat drying with high-temperature steam in a dryer, sewage in the sludge is heated and evaporated to become waste steam of about 100 ℃, micro negative pressure is formed in a cavity of the dryer under the action of air induced by an air inducing machine, the waste steam enters a waste gas conveying pipeline, dust is removed through a cyclone dust collector, part of large-particle dust falls to the bottom of the cyclone dust collector and is conveyed to a dry sludge conveying system through a dust star-shaped discharge valve, and meanwhile, the dust star-shaped discharge valve plays a role in air leakage of the sealed cyclone dust collector.
The waste steam after preliminary dust removal enters a first-level hump U-shaped pipe horizontal heat exchanger, the waste steam exchanges heat with condensed water at about 45 ℃ from a steam turbine in the heat exchanger, the condensed water of the steam turbine reaches above 85 ℃ after absorbing heat exchange, and the waste steam is conveyed to a boiler deaerator through a pipeline to be continuously recycled. Most of the waste steam is condensed into waste water and a small part of non-condensable gas through heat exchange, the temperature of the waste water and the non-condensable gas is about 50 ℃, fine dust particles can be attached to the heat exchange pipe wall of the horizontal heat exchanger of the first-level hump U-shaped pipe in the long-time operation process, the heat exchange efficiency is influenced, the first-level spraying device is periodically opened at the moment, the heat exchange pipe wall is sprayed and washed, and the cleanness of the heat pipe wall is kept.
Under the action of an induced draft fan and the self weight of water, wastewater and non-condensable gas at the temperature of about 50 ℃ enter a second-stage hump straight pipe horizontal heat exchanger from an outlet at the lower part of a first-stage hump U-shaped pipe horizontal heat exchanger, at the inlet of the second-stage hump straight pipe horizontal heat exchanger, the wastewater and the non-condensable gas are sprayed and cooled with sewage at the temperature of about 35 ℃ sprayed by a second-stage spraying device, meanwhile, heat exchange cooling condensation is carried out between the inside of the heat exchanger and cooling circulating water from a cooling tower, the cooling circulating water is conveyed to a water inlet at the bottom of the second-stage hump straight pipe horizontal heat exchanger. After the noncondensable gas is cooled again, water-gas separation is carried out again, a small amount of noncondensable gas enters an upper air chamber of the sewage storage tank through an air outlet in the side surface of the horizontal heat exchanger of the second-level hump straight pipe under the action of the induced draft fan for demisting and separating again, sewage flows into a lower water tank, and the noncondensable gas is sent into a primary air fan of the incinerator for incineration treatment through the induced draft fan.
The waste water after the cooling is discharged from the bottom of the second-stage hump straight pipe horizontal heat exchanger and enters the sewage water storage tank for temporary storage, and the sewage supernatant can respectively provide a spraying and flushing water source for the waste gas conveying pipeline, the first-stage spraying device and the second-stage spraying device through the sewage spraying pump. And in the operation process, redundant sewage is conveyed to a regulating tank of the sewage treatment system through a sewage pipeline by a sewage draining pump to be treated and is discharged after reaching the standard.
But under the high temperature weather in summer, the temperature that waste steam passes through the condensation of first grade heat exchanger, second grade heat exchanger, and the temperature that gets into the sewage water storage tank can be on the high side, and in order to stabilize the drainage temperature, close the straight pipeline of sewage, the sewage of sewage water storage tank passes through the sewage drain pump, and the pump send to the tertiary vertical tubular heat exchanger in with come from the cooling circulation water heat transfer cooling of cooling tower, and the sewage after the cooling is carried to sewage treatment system's equalizing basin pending, discharge up to standard.
Saturated steam from the boiler is condensed into saturated water after the work of heat exchange and drying with sludge in the dryer is finished, the saturated water is conveyed to a condensate water storage tank for buffering and temporary storage through a condensate water pipeline valve by a main hot shaft drain valve and a jacket drain valve of the dryer, and finally the saturated water is conveyed to a boiler deaerator for utilization through a condensate water pump.
Further, the sludge granulation and conveying system comprises a spiral conveyor, an A, Z type double-chain lifting scraper conveyor C, a sludge granulation machine, a horizontal single-chain switching scraper conveyor B and a multi-point distribution scraper conveyor which are sequentially connected; the multi-point distribution scraper conveyor is connected with the incinerator and the overhaul standby scraper conveyor D, and the overhaul standby scraper conveyor D is connected with the garbage storage pit.
Further, the wet sludge storage system comprises a sludge bin, and the sludge bin is connected with the dryer through a cone valve type hydraulic paste pump; the hydraulic station of the cone valve type hydraulic paste pump is connected with a circulating cooling oil tank through a circulating oil pump, an oil-water cooler of the hydraulic station is connected with the circulating cooling oil tank through a pipeline, a water inlet pipe of the oil-water cooler of the hydraulic station is connected with a medicament diaphragm pump, and the medicament diaphragm pump is connected with a scale inhibitor barrel.
Furthermore, a hydraulic gate valve, a grating and a positive pressure double-screw conveyer A are arranged between the sludge bin and the cone valve type hydraulic paste pump along the flow direction of the sludge.
The sludge is dried in the dryer, semi-dry sludge with the water content of about 40 percent enters a horizontal single-chain scraper conveyor with a low elevation through a dryer discharging screw conveyor, the sludge is conveyed to a Z-shaped double-chain lifting scraper conveyor C and then lifted to a height elevation platform above a feed inlet of the incinerator, the sludge is transferred to sludge granulation equipment, the sludge enters a special sludge granulator through a three-dimensional guide chute for granulation and molding, cylindrical sludge particles with the diameter of 20-30mm and different lengths are formed, the density of the granulated sludge is increased, and the sludge is uniformly fed into the incinerator through the horizontal single-chain scraper conveyor and a multi-point material distribution single-chain scraper conveyor to be subjected to coordinated incineration with garbage. When the incinerator is overhauled, the multi-point material distribution port valve of the multi-point material distribution single-chain scraper conveyor is closed, and finally the sludge enters the standby scraper conveyor through the herringbone electric distributor and is conveyed to the garbage storage pit for temporary storage.
After wet sludge with the water content of about 80 percent enters a plant is poured into a sludge bin for temporary storage, the wet sludge enters a drier through a sludge hydraulic pumping system and exchanges heat with high-temperature saturated steam with the temperature of 260 ℃ from a steam engine for secondary pumping, the wet sludge with the water content of about 40 percent is granulated and formed from a scraper conveyor to a special sludge granulator to form cylindrical sludge particles with the diameters of 20-30mm and different lengths, the density of the granulated sludge is increased, and the granulated sludge is uniformly fed into an incinerator through the scraper conveyor and multi-point distribution for coordinated incineration treatment with garbage.
The utility model has the advantages that: leading to granulation behind the sludge drying in this application, improving the efficiency of sludge combustion, improving the calorific value behind the sludge drying, reaching the calorific value of self-sustaining burning: the sludge is dried, molded and then burnt, so that the phenomenon of fire suppression in the burning process is reduced, and the garbage and the sludge in the hearth can be fully burnt; . Meanwhile, due to the large sludge forming density, the amount of dust and fly ash in the incineration process is reduced, the maintenance ash removal interval time of the incinerator is favorably prolonged, and the running time of the incinerator is improved; through detection, the formed sludge is subjected to mixed combustion, and the mixed combustion ratio reaches more than or equal to 8% on the basis of ensuring that the smoke reaches the standard and is discharged.
Drawings
FIG. 1 is a schematic diagram of a sludge drying system according to the present application;
FIG. 2 is an enlarged view of the wet sludge storage system of FIG. 1;
FIG. 3 is a schematic view of a sludge drying and waste steam condensing and heat recovery system;
FIG. 4 is an enlarged view of FIG. 3 at B;
FIG. 5 is an enlarged view at C in FIG. 3;
FIG. 6 is an enlarged view of FIG. 2 at D;
fig. 7 is a schematic structural view of a sludge granulation and conveying system.
The reference numbers are recorded as follows: a wet sludge storage system 1, a sludge bin 1.1, a cone valve type hydraulic paste pump 1.2, a scale inhibitor medicine barrel 1.3, a circulating cooling oil tank 1.4, a hydraulic station oil-water cooler 1.5, a hydraulic gate valve 1.6, a grid 1.7, a positive pressure double-screw conveyor A1.8,
a sludge drying and waste steam condensing and heat recovering system 2, a dryer 2.1, a cyclone dust collector 2.2, a primary heat exchanger 2.3, a secondary heat exchanger 2.4, a cooling tower 2.5, a tertiary heat exchanger 2.6, a sewage water storage tank 2.7, a sewage adjusting tank 2.9, a sewage disposal well 2.10, a boiler deaerator 2.11, a spray water pump 2.13, a sewage draining pump 2.14 and a cooling circulating water pump 2.18,
sludge granulation and conveying system 3, screw conveyer 3.1, horizontal single-chain scraper conveyor A3.2, Z type double-chain promotion scraper conveyor C3.3, sludge granulation machine 3.4, horizontal single-chain switching scraper conveyor B3.5, multipoint distribution scraper conveyor 3.6, incinerator 3.7, overhaul reserve scraper conveyor D3.8, rubbish storage pit 3.9.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
A sludge drying system (see the figures 1-7) comprises a wet sludge storage system 1, a sludge drying and waste steam condensing and heat recovery system 2 and a sludge granulating and conveying system 3 which are connected into a whole;
the sludge drying and waste steam condensing and heat recovery system 2 comprises a dryer 2.1 and a waste steam condensing and heat recovery system;
the dryer 2.1 is connected with a waste steam condensation and heat recovery system, a dryer condensed water collection system and a sludge granulation and conveying system 3;
the waste steam condensing and heat recovering system comprises a dryer waste gas circulation pipeline system and a cooling water pipeline system.
The dryer waste gas circulation pipeline system is formed by sequentially connecting a cyclone dust collector 2.2, a primary heat exchanger 2.3, a secondary heat exchanger 2.4 and a sewage storage tank 2.7 through pipelines;
the cooling water pipeline system comprises a primary heat exchanger cooling water pipeline system and a secondary heat exchanger cooling water pipeline system; the cooling water pipeline system of the primary heat exchanger is characterized in that a condensation water port of a steam turbine is connected with a primary heat exchanger 2.3 through a pipeline, and the primary heat exchanger 2.3 is connected with a boiler deaerator 2.11 through a pipeline;
the cooling water pipeline system of the secondary heat exchanger connects the cooling tower 2.5 and the secondary heat exchanger 2.4 into a circulating system, a cooling water pool under the cooling tower 2.5 is connected with the secondary heat exchanger 2.4 through a pipeline and a cooling circulating water pump 2.18 on the pipeline, the secondary heat exchanger 2.4 is connected with the cooling tower 2.5 through a pipeline, a water pipe on a water outlet of the cooling circulating water pump 2.18 is also connected with a tertiary heat exchanger 2.6, and the tertiary heat exchanger 2.6 is also connected with a pipeline for connecting the secondary heat exchanger 2.4 with the cooling tower 2.5 through a pipeline;
a condensed water outlet of the dryer 2.1 is connected with a sewage well 2.10, a condensate water storage tank 2.8 or a boiler deaerator 2.11 through a pipeline, and the condensate water storage tank 2.8 is communicated with the boiler deaerator 2.11 through a high-temperature condensate water lift pump;
the sewage storage tank 2.7 is also connected with a spraying system, the spraying system comprises a spraying water pump 2.13, the water inlet end of the spraying water pump 2.13 is connected with the sewage storage tank 2.7 through a pipeline, the water outlet end of the spraying water pump 2.13 is connected with a primary spraying device of the primary heat exchanger 2.3 and a secondary spraying device of the secondary heat exchanger 2.4 through pipelines, and the spraying water pump 2.13 is also communicated with a pipeline of a waste gas outlet of the dryer 2.1; the sewage storage tank 2.7 is connected with the tertiary heat exchanger 2.6 through a pipeline and a sewage draining pump 2.14 on the pipeline; the third-stage heat exchanger 2.6 is connected with a sewage adjusting tank 2.9 through a pipeline; the bottom of the cyclone dust collector 2.2 is provided with a star-shaped discharge valve which is connected with a dry sludge horizontal scraper conveyor.
The primary heat exchanger 2.3 is a horizontal heat exchanger with a hump U-shaped pipe; the second-stage heat exchanger 2.4 is a hump straight pipe horizontal heat exchanger, and the third-stage heat exchanger 2.6 is a tubular vertical heat exchanger.
The sewage water storage tank 2.7 connect the frequency conversion draught fan, the frequency conversion draught fan is connected garbage incinerator primary air fan 2.14.
The first-stage heat exchanger 2.3 department set up the first-stage heat exchanger bypass pipeline, first-stage heat exchanger bypass pipeline both ends are connected respectively and are advanced the pipe and the waste gas exit tube at first-stage heat exchanger 2.3, respectively set up a control valve on the waste gas of first-stage heat exchanger bypass pipeline, first-stage heat exchanger 2.3 advances the pipe and the waste gas exit tube.
And a sewage meter is arranged on a pipeline between the three-stage heat exchanger 2.6 and the sewage regulating tank 2.9, and a sewage meter bypass pipeline is arranged at the sewage meter.
And the secondary heat exchanger 2.4 and the tertiary heat exchanger 2.6 are connected in parallel with a cooling water pipeline system of the secondary heat exchanger.
And a tee joint A is arranged on a pipeline between the dryer 2.1 and the cyclone dust collector 2.2, and the tee joint A is provided with a pipeline connected with a primary heat exchanger 2.3.
The air inlet of the main shaft of the dryer 2.1 is connected with a tee joint on the steam inlet pipe through a pipeline, the other opening of the tee joint is connected with the air inlet of the jacket of the dryer after being connected with the cyclone dust collector through a pipeline, and bypass pipelines provided with control valves are arranged on the steam pipelines on the two sides of the cyclone dust collector.
The condensed water outlet of the dryer 2.1 comprises a jacket water outlet and a main shaft water outlet; the pipeline of the condensed water outlet of the jacket and the water outlet of the main shaft is connected with a condensed liquid water storage tank 2.8 through a tee joint.
The condensate water storage tank 2.8 department set up condensate water storage tank bypass pipeline, condensate water storage tank bypass pipeline intercommunication boiler oxygen-eliminating device 2.11 and desiccator condensate water pipeline, condensate water storage tank bypass pipeline sets up the control valve.
The sludge granulating and conveying system 3 (see fig. 7) comprises a spiral conveyor 3.1, a horizontal single-chain scraper conveyor A3.2, a Z-shaped double-chain lifting scraper conveyor C3.3, a sludge granulator 3.4, a horizontal single-chain transfer scraper conveyor B3.5 and a multi-point distributing scraper conveyor 3.6 which are connected in sequence; the multipoint distribution scraper conveyor 3.6 is connected with the incinerator 3.7 and the overhaul standby scraper conveyor D3.8, and the overhaul standby scraper conveyor D3.8 is connected with the garbage storage pit 3.9.
The wet sludge storage system 1 (see fig. 2) comprises a sludge bin 1.1, wherein the sludge bin 1.1 is connected with a dryer 2.1 through a cone valve type hydraulic paste pump 1.2; a hydraulic station of the cone valve type hydraulic paste pump 1.2 is connected with a circulating cooling oil tank 1.4 through a circulating oil pump, an oil-water cooler 1.5 of the hydraulic station is connected with the circulating cooling oil tank 1.4 through a pipeline, the hydraulic station of the cone valve type hydraulic paste pump 1.2, the oil-water cooler 1.5 of the hydraulic station, the oil-water cooler 1.4 of the circulating cooling oil tank and the circulating oil pump form a circulating system, a water inlet pipe of the oil-water cooler 1.5 of the hydraulic station is connected with a medicament diaphragm pump, and the medicament diaphragm pump is connected with a scale inhibitor medicine barrel 1.3.
A hydraulic gate valve 1.6, a grating 1.7 and a positive pressure double-helix conveyer A1.8 (see figure 6) are arranged between the sludge bin 1.1 and the cone valve type hydraulic paste pump 1.2 along the sludge flowing direction.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (12)
1. A sludge drying system is characterized by comprising a wet sludge storage system (1), a sludge drying and waste steam condensing and heat recovery system (2) and a sludge granulating and conveying system (3) which are connected into a whole;
the sludge drying and waste steam condensing and heat recovery system (2) comprises a drier (2.1) and a waste steam condensing and heat recovery system;
the dryer (2.1) is connected with a waste steam condensation and heat recovery system, a dryer condensed water collection system and a sludge granulation and conveying system (3);
the waste steam condensation and heat recovery system comprises a dryer waste gas circulation pipeline system and a cooling water pipeline system;
the dryer waste gas circulation pipeline system is formed by sequentially connecting a cyclone dust collector (2.2), a primary heat exchanger (2.3), a secondary heat exchanger (2.4) and a sewage storage tank (2.7) through pipelines;
the cooling water pipeline system comprises a primary heat exchanger cooling water pipeline system and a secondary heat exchanger cooling water pipeline system; the cooling water pipeline system of the primary heat exchanger is characterized in that a condensation water port of a steam turbine is connected with the primary heat exchanger (2.3) through a pipeline, and the primary heat exchanger (2.3) is connected with a boiler deaerator (2.11) through a pipeline;
the cooling water pipeline system of the secondary heat exchanger connects the cooling tower (2.5) and the secondary heat exchanger (2.4) into a circulating system, a cooling water pool under the cooling tower (2.5) is connected with the secondary heat exchanger (2.4) through a pipeline and a cooling circulating water pump (2.18) on the pipeline, the secondary heat exchanger (2.4) is connected with the cooling tower (2.5) through a pipeline, a water pipe on a water outlet of the cooling circulating water pump (2.18) is also connected with the tertiary heat exchanger (2.6), and the tertiary heat exchanger (2.6) is also connected to a pipeline for connecting the secondary heat exchanger (2.4) and the cooling tower (2.5) through a pipeline;
a condensed water outlet of the dryer (2.1) is connected with a sewage well (2.10), a condensate water storage tank (2.8) or a boiler deaerator (2.11) through a pipeline, and the condensate water storage tank (2.8) is communicated with the boiler deaerator (2.11) through a high-temperature condensate water lift pump;
the sewage storage tank (2.7) is also connected with a spraying system, the spraying system comprises a spraying water pump (2.13), the water inlet end of the spraying water pump (2.13) is connected with the sewage storage tank (2.7) through a pipeline, the water outlet end of the spraying water pump (2.13) is connected with a first-stage spraying device of the first-stage heat exchanger (2.3) and a second-stage spraying device of the second-stage heat exchanger (2.4) through pipelines, and the spraying water pump (2.13) is also communicated with a pipeline of a waste gas outlet of the dryer (2.1); the sewage storage tank (2.7) is connected with the three-level heat exchanger (2.6) through a pipeline and a sewage draining pump (2.14) on the pipeline; the third-stage heat exchanger (2.6) is connected with a sewage adjusting tank (2.9) through a pipeline;
the bottom of the cyclone dust collector (2.2) is provided with a star-shaped discharge valve which is connected with a dry sludge horizontal scraper conveyor;
the primary heat exchanger (2.3) is a horizontal heat exchanger with a hump U-shaped pipe; the second-stage heat exchanger (2.4) is a hump straight tube horizontal heat exchanger, and the third-stage heat exchanger (2.6) is a tubular vertical heat exchanger.
2. The sludge drying system as claimed in claim 1, wherein the sewage storage tank (2.7) is connected with a variable frequency induced draft fan, and the variable frequency induced draft fan is connected with a primary air fan of the garbage incinerator.
3. The sludge drying system as claimed in claim 1, wherein a primary heat exchanger bypass pipeline is arranged at the primary heat exchanger (2.3), two ends of the primary heat exchanger bypass pipeline are respectively connected to the waste gas inlet pipe and the waste gas outlet pipe of the primary heat exchanger (2.3), and a control valve is respectively arranged on the primary heat exchanger bypass pipeline and the waste gas inlet pipe and the waste gas outlet pipe of the primary heat exchanger (2.3).
4. The sludge drying system as claimed in claim 1, wherein a sewage meter is arranged on the pipeline between the tertiary heat exchanger (2.6) and the sewage adjusting tank (2.9), and a sewage meter bypass pipeline is arranged at the sewage meter.
5. The sludge drying system as claimed in claim 1, wherein the secondary heat exchanger (2.4) and the tertiary heat exchanger (2.6) are connected in parallel with a cooling water pipeline system of the secondary heat exchanger.
6. The sludge drying system of claim 1, wherein a tee joint A is arranged on a pipeline between the dryer (2.1) and the cyclone dust collector (2.2), and the tee joint A is provided with a pipeline connected with the primary heat exchanger (2.3).
7. The sludge drying system as claimed in claim 1, wherein the air inlet of the main shaft of the dryer (2.1) is connected with a tee joint on the steam inlet pipe through a pipeline, the other port of the tee joint is connected with the air inlet of the jacket of the dryer after being connected with the cyclone dust collector through a pipeline, and bypass pipelines provided with control valves are arranged on the steam pipeline at two sides of the cyclone dust collector.
8. The sludge drying system as claimed in claim 1, wherein the condensed water outlet of the dryer (2.1) comprises a jacket water outlet and a spindle water outlet; the pipeline of the condensed water outlet of the jacket and the water outlet of the main shaft is connected with a condensed liquid water storage tank (2.8) after being connected through a tee.
9. The sludge drying system as claimed in claim 8, wherein a condensate water storage tank bypass line is provided at the condensate water storage tank (2.8), the condensate water storage tank bypass line is communicated with the boiler deaerator (2.11) and the dryer condensate water line, and the condensate water storage tank bypass line is provided with a control valve.
10. The sludge drying system according to claim 1, wherein the sludge granulating and conveying system (3) comprises a screw conveyor (3.1), a horizontal single-chain scraper conveyor A (3.2), a Z-shaped double-chain lifting scraper conveyor C (3.3), a sludge granulator (3.4), a horizontal single-chain transfer scraper conveyor B (3.5) and a multi-point cloth scraper conveyor (3.6) which are connected in sequence; the multi-point distributing scraper conveyor (3.6) is connected with the incinerator (3.7) and the standby overhauling scraper conveyor D (3.8), and the standby overhauling scraper conveyor D (3.8) is connected with the garbage storage pit (3.9).
11. The sludge drying system as claimed in claim 1, wherein the wet sludge storage system (1) comprises a sludge bin (1.1), and the sludge bin (1.1) is connected with a dryer (2.1) through a cone valve type hydraulic paste pump (1.2); a hydraulic station of a cone valve type hydraulic paste pump (1.2) is connected with a circulating cooling oil tank (1.4) through a circulating oil pump, an oil-water cooler (1.5) of the hydraulic station is connected with the circulating cooling oil tank (1.4) through a pipeline, the hydraulic station of the cone valve type hydraulic paste pump (1.2), the oil-water cooler (1.5) of the hydraulic station, the circulating cooling oil tank (1.4) and the circulating oil pump form a circulating system, a water inlet pipe of the oil-water cooler (1.5) of the hydraulic station is connected with a medicament diaphragm pump, and the medicament diaphragm pump is connected with a scale inhibitor medicine barrel (1.3).
12. The sludge drying system of claim 11, wherein a hydraulic gate valve (1.6), a grating (1.7) and a positive pressure double-screw conveyor A (1.8) are arranged between the sludge bin (1.1) and the cone valve type hydraulic paste pump (1.2) along the sludge flow direction.
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| CN201921933113.1U CN211814101U (en) | 2019-11-11 | 2019-11-11 | Sludge drying system |
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| CN201921933113.1U CN211814101U (en) | 2019-11-11 | 2019-11-11 | Sludge drying system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110759625A (en) * | 2019-11-11 | 2020-02-07 | 烟台润达垃圾处理运营有限公司 | Sludge drying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759625A (en) * | 2019-11-11 | 2020-02-07 | 烟台润达垃圾处理运营有限公司 | Sludge drying system |
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