CN110790473A - Drying method for textile sludge and recycling method for textile sludge in thermal power plant - Google Patents
Drying method for textile sludge and recycling method for textile sludge in thermal power plant Download PDFInfo
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- CN110790473A CN110790473A CN201911034109.6A CN201911034109A CN110790473A CN 110790473 A CN110790473 A CN 110790473A CN 201911034109 A CN201911034109 A CN 201911034109A CN 110790473 A CN110790473 A CN 110790473A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/08—Drying or removing water
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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
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Water Supply & Treatment (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a textile sludge drying and thermal power plant recycling method, which comprises a sludge drying unit, a boiler incineration unit, a power plant power generation unit, a flue gas desulfurization and denitrification unit and a waste residue treatment unit, and the five units are combined together. The textile sludge drying and thermal power plant recycling method can realize a sludge treatment mode combining sludge drying incineration and power plant coal blending incineration, not only solves the energy consumption problem of sludge drying, but also fully utilizes the original heat value of the sludge, therefore, the technology of drying the sludge by using the waste heat of the flue gas and cooperating with the coal burning incineration is one of the sludge treatment technologies with most advantages and prospects, well meets the requirements of environmental protection, energy conservation and emission reduction, achieves the requirement of recycling the sludge after drying treatment, and fundamentally realizes the purposes of harmlessness, reduction, stabilization and recycling of the sludge treatment.
Description
Technical Field
The invention relates to the technical field of sludge disposal and recycling, in particular to a textile sludge drying and recycling method for a thermal power plant.
Background
The sludge is a necessary product after sewage treatment in a sewage treatment plant, the sludge is a high-moisture porous medium substance, has high water content and large volume, the water content of untreated sludge is up to 75-99%, the sludge mainly comprises adsorbed water, internal water, capillary water and interstitial water, the sludge contains organic matters, nitrogen, phosphorus, potassium and various trace elements with potential utilization values, but also contains pathogenic substances such as parasitic ova and pathogenic microorganisms, heavy metals such as copper, zinc and chromium, and also contains polychlorinated biphenyl and dioxin which are difficult to degrade toxic and harmful substances, the special structure and the composition of the sludge cause very difficult treatment, if the sludge is not properly treated and disposed, secondary pollution is certainly caused to the environment, the sludge seriously influences the production and the life of people and causes serious pollution to the environment, and the problem of urban sludge treatment becomes a difficult problem to be urgently solved in the current society, because the discharge of the sludge is not strictly supervised for a long time, and simultaneously because the construction technology level of related sewage treatment facilities and the limit of insufficient understanding degree of the sludge harm are realized, the research of the sludge treatment technology is converted into practical application and is still in the beginning stage in China, the current situation of domestic sludge treatment is not optimistic, and the sludge treatment technology is mainly reflected in the following aspects:
1. heavy sewage treatment and light sludge treatment. At present, many sewage treatment plants in China generally peel off sewage and sludge treatment units and are popularized for promotion, in order to pursue the sewage treatment rate, the sludge treatment unit is simplified or even ignored as much as possible, wet sludge which is not treated is transported outside at will, is simply buried or is directly stacked, and great hidden danger is brought to the natural environment;
2. the sludge treatment process is laggard, the design level is low, the difference between the sludge treatment technology adopted by some sewage treatment plants and the foreign advanced technology is larger, the design level of the process is lower, and the operation working condition is not good;
3. the sludge treatment management level is low, because the development time of the sludge treatment technology in China is short, and the sludge treatment is lack of sufficient attention in China, the experience of managers and operators of the sludge treatment process on the operation of the sludge treatment process is insufficient, so that the sludge treatment process cannot be effectively operated, in addition, the sludge treatment management system and the standard system in China are imperfect, so that the treatment problem of the sludge is more severe, and the sludge management is a great challenge.
Compared with sludge landfill and compost treatment, the drying incineration method has the advantages of volume reduction, high weight reduction rate, high treatment speed, complete harmlessness, energy recycling and the like, and is one of effective practical technologies for treating sludge.
The method is characterized in that sludge is dried and then is cooperatively incinerated in a coal-fired boiler, the method is a sludge harmless treatment mode which is suitable according to local conditions, saves energy and reduces emission, has better applicability in areas lacking land resources, has higher water content after dehydration according to the existing dehydration process, generally needs heat drying to convert sludge with low calorific value into usable fuel with higher calorific value, then implements clean and efficient combustion, can reduce the volume of residual sludge to the minimum by incineration, and can use energy for drying sludge or generating and supplying heat; high temperatures can kill pathogens.
Although the sludge treated by incineration has many advantages, the water content of the sludge subjected to natural flocculation precipitation is generally more than 90%, and is still generally higher than 75% after being dehydrated by a mechanical dehydration device, so that the high water content cannot maintain the self-sustaining of the combustion process, and auxiliary fuel must be added; on the other hand, the sludge is huge in volume, the difficulty of transportation and storage in the incineration treatment process is increased, due to the reasons, large one-time investment is often needed when the sludge incinerator is independently built, and because certain heat energy still remains in high-temperature flue gas discharged by the coal-fired power station boiler and is not utilized, the sludge can be heated and dried by utilizing the heat energy; in addition, the coal burning demand of the power station boiler is large, and the flame temperature of the hearth is high, so that the most thorough harmless treatment can be realized by burning the dried sludge by using the power station boiler; the high efficiency of the utility boiler also enables the heat energy generated by the combustion of the organic matters in the sludge to be more fully utilized.
In conclusion, the sludge treatment can be completed in a resource or recycling manner, and the aim of protecting the environment can be fulfilled.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a textile sludge drying and thermal power plant recycling method, which solves the problem of environmental pollution and reduces the energy consumption by scientifically and reasonably utilizing sludge drying and thermal power plant burning technologies and implementing harmless treatment on sludge and using the sludge as a resource.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the textile sludge drying and thermal power plant recycling method comprises a sludge drying unit, a boiler incineration unit, a power plant power generation unit, a flue gas desulfurization and denitrification unit and a waste residue treatment unit, wherein the five units are combined, and the treatment method specifically comprises the following steps:
s1, a sludge drying unit: the wet textile sludge enters a sludge dryer through a conveying system, the sludge dryer dries the sludge in a heating mode by adopting the waste heat of flue gas, and the dried sludge and coal are mixed and then are fed into a boiler incineration unit;
s2, boiler incineration unit: fully mixing the dry sludge from the sludge drying unit in the step S1 with coal, introducing the mixture into a boiler through a conveying system for incineration, condensing and preheating the flue gas passing through a dryer, and introducing the flue gas into the boiler through the conveying system;
s3, power generation unit of thermal power plant: burning the mixed fuel of the dried sludge and the coal in a boiler, and heating and vaporizing water in a reservoir of the thermal power plant by taking the mixed fuel as a heat source to generate a large amount of steam as a raw material for generating electricity in the thermal power plant;
s4, flue gas desulfurization and denitrification unit: treating part of redundant flue gas generated by incineration in the step S3 by a desulfurization and denitrification device, and then discharging;
s5, a waste residue treatment unit: and (5) conveying the waste residues generated by the boiler in the step (S3) out through a waste residue conveying system, then carrying out centralized collection, and then properly disposing.
Preferably, the sludge dryer in the step S1 is one of a WLSI-100 single-channel rotary dryer, a WTDDS-100 hot air rotary dryer or a KDEXI-100 hollow blade dryer.
Preferably, the coal mixed with the dried sludge in step S1 is selected from one or more of lean coal, coking coal, fat coal, gas coal, weakly caking coal, non-caking coal, long flame coal, lean coal or lignite.
Preferably, the boiler in the step S1 is one of a pulverized coal boiler and a circulating fluidized bed boiler.
Preferably, the conveying system in step S2 and step S5 are driven by a servo motor and are controlled by an automatic program using a PLC programmable controller.
Preferably, the desulfurization and denitrification device in the step S4 uses a high-temperature bag-type dust collector to remove SO in the flue gas2The calcium-based or sodium-based desulfurizer is sprayed into a flue in front of a bag-type dust remover, a filter layer on the outer surface of the bag is used for removing NOx, ammonia gas is sprayed into the flue, and then the SCR selective catalytic reducing agent is arranged in the bag to remove NOx, and the dust removal is completed through the self characteristics of the bag.
(III) advantageous effects
The invention provides a textile sludge drying and thermal power plant recycling method. Compared with the prior art, the method has the following beneficial effects:
(1) the textile sludge drying and thermal power plant recycling method comprises a sludge drying unit, a boiler incineration unit, a power plant power generation unit, a flue gas desulfurization and denitrification unit and a waste residue treatment unit, wherein the five units are combined, and the treatment method specifically comprises the following steps: s1, a sludge drying unit: weaving wet sludge passes through conveying system and gets into sludge dryer, and sludge dryer carries out the mummification through adopting flue gas waste heat heating mode to mud and handles, and the mud after will mummification is mixed with the coal and is put into the boiler and burn the unit, S2, boiler burn the unit: fully mixing the dry sludge and coal discharged from the sludge drying unit in the step S1, introducing the mixture into a boiler through a conveying system for incineration, condensing and preheating the flue gas of a dryer, and introducing the flue gas into the boiler through the conveying system, S3, a power generation unit of a thermal power plant: burning the fuel mixed with the dried sludge and the coal in a boiler, taking the fuel as a heat source to heat and vaporize water in a reservoir of the thermal power plant so as to generate a large amount of steam as a raw material for power generation of the thermal power plant, and S4, a flue gas desulfurization and denitrification unit: and (2) treating part of redundant flue gas generated by incineration in the step (S3) by a desulfurization and denitrification device, and then discharging, wherein the step (S5) is as follows: the waste residues generated by the boiler in the step S3 are transported out through the waste residue conveying system, collected in a centralized manner and properly disposed, and a sludge treatment disposal mode combining sludge drying incineration and power plant coal blending incineration can be realized, so that the energy consumption problem of sludge drying is solved, the original heat value of the sludge is fully utilized, and therefore, the technology of drying the sludge by using the waste heat of the flue gas and cooperating with the coal burning incineration is one of sludge treatment disposal technologies with most advantages and prospects.
(2) The drying method of the textile sludge and the recycling method of the textile sludge in the thermal power plant well meet the requirements of environmental protection, energy conservation and emission reduction, the sludge is dried to meet the requirement of recycling, and the aims of harmlessness, reduction, stabilization and recycling of sludge treatment are fundamentally fulfilled.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the embodiment of the present invention provides three technical solutions: a textile sludge drying and thermal power plant recycling method specifically comprises the following embodiments:
example 1
The textile sludge drying and thermal power plant recycling method comprises a sludge drying unit, a boiler incineration unit, a power plant power generation unit, a flue gas desulfurization and denitrification unit and a waste residue treatment unit, wherein the five units are combined, and the treatment method specifically comprises the following steps:
s1, a sludge drying unit: the wet textile sludge enters a sludge dryer through a conveying system, the sludge dryer dries the sludge in a flue gas waste heat heating mode, the dried sludge and coal are mixed and then put into a boiler incineration unit, the sludge dryer is a WLSI-100 single-channel rotary dryer, the coal mixed with the dried sludge is a composition of lean coal, coking coal, fat coal, gas coal, weak bonding, non-bonding, long flame coal, lean coal and lignite, and the boiler is a pulverized coal furnace;
s2, boiler incineration unit: fully mixing the dry sludge from the sludge drying unit in the step S1 with coal, introducing the mixture into a boiler through a conveying system for incineration, condensing and preheating the flue gas passing through a dryer, and introducing the flue gas into the boiler through the conveying system;
s3, power generation unit of thermal power plant: burning the mixed fuel of the dried sludge and the coal in a boiler, and heating and vaporizing water in a reservoir of the thermal power plant by taking the mixed fuel as a heat source to generate a large amount of steam as a raw material for generating electricity in the thermal power plant;
s4, flue gas desulfurization and denitrification unit: treating part of redundant flue gas generated by incineration in the step S3 by using a desulfurization and denitrification device, and then discharging the treated part of redundant flue gas, wherein the desulfurization and denitrification device uses a high-temperature bag-type dust collector to remove SO in the flue gas2The method comprises the steps of spraying a calcium-based or sodium-based desulfurizer into a flue in front of a bag-type dust remover, removing NOx by using a filter layer on the outer surface of the bag, spraying ammonia gas into the flue, and then realizing the removal by using an SCR selective catalytic reducing agent arranged in the bag, wherein the dust removal is finished by the self characteristics of the bag;
s5, a waste residue treatment unit: and (5) conveying the waste residues generated by the boiler in the step (S3) out through a waste residue conveying system, then carrying out centralized collection, and then properly disposing, wherein the conveying system is driven by a servo motor, and automatic program control is carried out by adopting a PLC (programmable logic controller).
Example 2
The textile sludge drying and thermal power plant recycling method comprises a sludge drying unit, a boiler incineration unit, a power plant power generation unit, a flue gas desulfurization and denitrification unit and a waste residue treatment unit, wherein the five units are combined, and the treatment method specifically comprises the following steps:
s1, a sludge drying unit: the method comprises the following steps that textile wet sludge enters a sludge dryer through a conveying system, the sludge dryer dries the sludge in a flue gas waste heat heating mode, the dried sludge and coal are mixed and then are put into a boiler incineration unit, the sludge dryer is a WTDDS-100 hot air rotary vane dryer, the coal mixed with the dried sludge is a composition of lean coal, coking coal, fat coal, gas coal, weak bonding, non-bonding and long flame coal, and the boiler is a circulating fluidized bed boiler;
s2, boiler incineration unit: fully mixing the dry sludge from the sludge drying unit in the step S1 with coal, introducing the mixture into a boiler through a conveying system for incineration, condensing and preheating the flue gas passing through a dryer, and introducing the flue gas into the boiler through the conveying system;
s3, power generation unit of thermal power plant: burning the mixed fuel of the dried sludge and the coal in a boiler, and heating and vaporizing water in a reservoir of the thermal power plant by taking the mixed fuel as a heat source to generate a large amount of steam as a raw material for generating electricity in the thermal power plant;
s4, flue gas desulfurization and denitrification unit: treating part of redundant flue gas generated by incineration in the step S3 by using a desulfurization and denitrification device, and then discharging the treated part of redundant flue gas, wherein the desulfurization and denitrification device uses a high-temperature bag-type dust collector to remove SO in the flue gas2The method comprises the steps of spraying a calcium-based or sodium-based desulfurizer into a flue in front of a bag-type dust remover, removing NOx by using a filter layer on the outer surface of the bag, spraying ammonia gas into the flue, and then realizing the removal by using an SCR selective catalytic reducing agent arranged in the bag, wherein the dust removal is finished by the self characteristics of the bag;
s5, a waste residue treatment unit: and (5) conveying the waste residues generated by the boiler in the step (S3) out through a waste residue conveying system, then carrying out centralized collection, and then properly disposing, wherein the conveying system is driven by a servo motor, and automatic program control is carried out by adopting a PLC (programmable logic controller).
Example 3
The textile sludge drying and thermal power plant recycling method comprises a sludge drying unit, a boiler incineration unit, a power plant power generation unit, a flue gas desulfurization and denitrification unit and a waste residue treatment unit, wherein the five units are combined, and the treatment method specifically comprises the following steps:
s1, a sludge drying unit: the method comprises the following steps that textile wet sludge enters a sludge dryer through a conveying system, the sludge dryer dries the sludge in a flue gas waste heat heating mode, the dried sludge and coal are mixed and then are fed into a boiler incineration unit, the sludge dryer is a KDEXI-100 hollow blade dryer, the coal mixed with the dried sludge is lean coal, and the boiler is a pulverized coal furnace;
s2, boiler incineration unit: fully mixing the dry sludge from the sludge drying unit in the step S1 with coal, introducing the mixture into a boiler through a conveying system for incineration, condensing and preheating the flue gas passing through a dryer, and introducing the flue gas into the boiler through the conveying system;
s3, power generation unit of thermal power plant: burning the mixed fuel of the dried sludge and the coal in a boiler, and heating and vaporizing water in a reservoir of the thermal power plant by taking the mixed fuel as a heat source to generate a large amount of steam as a raw material for generating electricity in the thermal power plant;
s4, flue gas desulfurization and denitrification unit: treating part of redundant flue gas generated by incineration in the step S3 by using a desulfurization and denitrification device, and then discharging the treated part of redundant flue gas, wherein the desulfurization and denitrification device uses a high-temperature bag-type dust collector to remove SO in the flue gas2The method comprises the steps of spraying a calcium-based or sodium-based desulfurizer into a flue in front of a bag-type dust remover, removing NOx by using a filter layer on the outer surface of the bag, spraying ammonia gas into the flue, and then realizing the removal by using an SCR selective catalytic reducing agent arranged in the bag, wherein the dust removal is finished by the self characteristics of the bag;
s5, a waste residue treatment unit: and (5) conveying the waste residues generated by the boiler in the step (S3) out through a waste residue conveying system, then carrying out centralized collection, and then properly disposing, wherein the conveying system is driven by a servo motor, and automatic program control is carried out by adopting a PLC (programmable logic controller).
To sum up the above
The invention can realize the sludge treatment and disposal mode combining sludge drying incineration and power plant coal blending incineration, not only solves the energy consumption problem of sludge drying, but also fully utilizes the original heat value of the sludge, therefore, the technology of drying the sludge by using the waste heat of the flue gas and cooperating with the coal burning incineration is one of the sludge treatment and disposal technologies with most advantages and prospects, well meets the requirements of environmental protection, energy saving and emission reduction, achieves the requirement of recycling the sludge after drying treatment, and fundamentally realizes the purposes of harmlessness, reduction, stabilization and resource utilization of the sludge treatment and disposal.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A textile sludge drying and thermal power plant recycling method is characterized in that: the system comprises a sludge drying unit, a boiler incineration unit, a power plant power generation unit, a flue gas desulfurization and denitrification unit and a waste residue treatment unit, and the treatment method specifically comprises the following steps:
s1, a sludge drying unit: the wet textile sludge enters a sludge dryer through a conveying system, the sludge dryer dries the sludge in a heating mode by adopting the waste heat of flue gas, and the dried sludge and coal are mixed and then are fed into a boiler incineration unit;
s2, boiler incineration unit: fully mixing the dry sludge from the sludge drying unit in the step S1 with coal, introducing the mixture into a boiler through a conveying system for incineration, condensing and preheating the flue gas passing through a dryer, and introducing the flue gas into the boiler through the conveying system;
s3, power generation unit of thermal power plant: burning the mixed fuel of the dried sludge and the coal in a boiler, and heating and vaporizing water in a reservoir of the thermal power plant by taking the mixed fuel as a heat source to generate a large amount of steam as a raw material for generating electricity in the thermal power plant;
s4, flue gas desulfurization and denitrification unit: treating part of redundant flue gas generated by incineration in the step S3 by a desulfurization and denitrification device, and then discharging;
s5, a waste residue treatment unit: and (5) conveying the waste residues generated by the boiler in the step (S3) out through a waste residue conveying system, then carrying out centralized collection, and then properly disposing.
2. The textile sludge drying and thermal power plant recycling method as claimed in claim 1, characterized in that: and in the step S1, the sludge dryer is one of a WLSI-100 single-channel rotary dryer, a WTDDS-100 hot air rotary-vane dryer or a KDEXI-100 hollow blade dryer.
3. The textile sludge drying and thermal power plant recycling method as claimed in claim 1, characterized in that: the coal mixed with the dried sludge in the step S1 is one or a combination of lean coal, coking coal, fat coal, gas coal, weak bonding, non-bonding, long flame coal, lean coal or lignite.
4. The textile sludge drying and thermal power plant recycling method as claimed in claim 1, characterized in that: the boiler in the step S1 is one of a pulverized coal boiler and a circulating fluidized bed boiler.
5. The textile sludge drying and thermal power plant recycling method as claimed in claim 1, characterized in that: the conveying systems in the step S2 and the step S5 are driven by servo motors and are controlled by an automatic program by a PLC programmable controller.
6. The textile sludge drying and thermal power plant recycling method as claimed in claim 1, characterized in that: the desulfurization and denitrification device in the step S4 utilizes a high-temperature bag-type dust collector to remove SO in the flue gas2The calcium-based or sodium-based desulfurizer is sprayed into a flue in front of a bag-type dust remover, a filter layer on the outer surface of the bag is used for removing NOx, ammonia gas is sprayed into the flue, and then the SCR selective catalytic reducing agent is arranged in the bag to remove NOx, and the dust removal is completed through the self characteristics of the bag.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021218074A1 (en) * | 2020-04-29 | 2021-11-04 | 华能国际电力股份有限公司 | Flue structure for sncr denitrification of flue gas from pulverized coal boiler and heating sludge-drying heat transfer oil |
| CN115337771A (en) * | 2022-08-26 | 2022-11-15 | 同济大学 | Coal-fired coupled sludge incineration power generation method |
Citations (7)
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| CN115337771B (en) * | 2022-08-26 | 2024-02-27 | 同济大学 | Coal-fired coupled sludge incineration power generation method |
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