CN110590120B - Sludge steam conditioning high-dry dehydration coupling incineration integrated device - Google Patents
Sludge steam conditioning high-dry dehydration coupling incineration integrated device Download PDFInfo
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- CN110590120B CN110590120B CN201910996888.1A CN201910996888A CN110590120B CN 110590120 B CN110590120 B CN 110590120B CN 201910996888 A CN201910996888 A CN 201910996888A CN 110590120 B CN110590120 B CN 110590120B
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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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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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
- 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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
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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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2203/00—Furnace arrangements
- F23G2203/50—Fluidised bed furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
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- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
A sludge steam conditioning high-dry dehydration coupling incineration integrated device belongs to the technical field of sludge dehydration incineration. The material outlet of the mixing and stirring tank is connected with the material inlet of the steam heating tank, the material outlet of the steam heating tank is connected with the material inlet of the high-pressure plate-and-frame filter press, the gas outlet of the steam heating tank is connected with the hot gas inlet of the spray tower, and the non-condensable gas outlet of the spray tower is connected with the air blower inlet of the fluidized bed incinerator; the water outlet of the high-pressure plate-and-frame filter press is connected with the water inlet of the mixing and stirring tank; the fluidized bed incinerator is connected with the high-temperature air preheater, and the high-temperature air preheater is connected with the fluidized bed incinerator; the flue gas outlet of the high-temperature air preheater is connected with the flue gas inlet of the waste heat boiler; the waste heat boiler is connected with the steam heating tank; the waste heat boiler is connected with a low-temperature air preheater, and the low-temperature air preheater is connected with a high-temperature air preheater and a blower; and a flue gas outlet of the low-temperature air preheater is connected with a tail gas treatment system. The invention is used for sludge dehydration and incineration.
Description
Technical Field
The invention belongs to the technical field of sludge dewatering and incineration, and particularly relates to a sludge steam conditioning high-dryness dewatering coupling incineration integrated device.
Background
At present, a stacked screw type sludge dewatering machine or a belt type filter press is mostly adopted in a sewage treatment plant for sludge dewatering, and the water content of the dewatered sludge is about 80%. The sludge has high water content and low heat value, and in order to adapt to the subsequent drying incineration treatment, the sludge with water content of 80 percent needs to be further dehydrated to the water content of less than 60 percent, so that more modifying agents, such as PAM (1-5 percent tDS) or PAC (2-5 percent tDS), FeCl3(8-10% tDS) and a large amount of CaO (20-30% tDS), and the dehydrated sludge can reach about 60% of water content through filter pressing of a plate-and-frame filter press. Therefore, a large amount of modifying agent is consumed, the dehydration cost is greatly increased, the heat value of the sludge is greatly reduced, the subsequent incineration is very unfavorable, the requirement of the sludge self-sustaining incineration cannot be met, natural gas is required to be added as auxiliary fuel, and the sludge incineration operation cost is increased.
Because municipal sludge in China has high sediment content and low heat value, sludge with 60 percent of water generally cannot be stably ignited and burnt, wet sludge with 60 percent of water needs to be dried to semi-dry sludge with 30 to 40 percent of water content through drying devices such as paddle or disc drying machines and the like, so that self-sustaining stable incineration can be realized, the drying devices such as the paddle or disc drying machines and the like need low-pressure saturated steam as a heat source, 1.4t of saturated steam is needed for evaporating 1t of water, the energy consumption is high, the manufacturing cost of the drying devices is high, for example, the wet sludge with 60 percent of water is dried to 30 percent of water through the paddle or disc drying machines after 100t of water is treated daily, the equipment investment is about 300 ten thousand yuan, the equipment power is 120KW, so that the sludge filter pressing, drying and incinerating system investment is large, the operation cost is high, and the sludge dewatering and incinerating technology needs to be improved urgently to reduce the initial equipment investment and the operation cost.
Disclosure of Invention
The invention aims to solve the problems of high investment, high operation cost and the like in the existing sludge dewatering and incinerating process, and provides a sludge steam conditioning high-dry dewatering coupling and incinerating integrated device, which has the following technical scheme:
a sludge steam tempering high-dry dehydration coupling incineration integrated method comprises the steps of adding sludge with the water content of 80%, water and a tempering agent PAM 1-2% tDS into a mixing and stirring tank to be uniformly stirred to obtain sludge with the water content of 90%, then feeding the sludge with the water content of 90% into a steam heating tank to be heated to 90-100 ℃, feeding the sludge with the water content of 90% at 90-100 ℃ into a high-pressure plate-and-frame filter press to be subjected to pressure filtration dehydration under the pressure of 5.0MPa to obtain a sludge filter cake with the water content of 30-35%; and finally, crushing the sludge filter cake with the water content of 30-35%, and then feeding the crushed sludge filter cake into a fluidized bed incinerator for self-sustaining incineration.
A sludge steam conditioning high-dryness dehydration coupling incineration integrated device comprises a mixing and stirring tank, a steam heating tank, a high-pressure plate-and-frame filter press, a fluidized bed incinerator, a spray tower and a waste heat boiler, wherein a material outlet of the mixing and stirring tank is connected with a material inlet of the steam heating tank through a sludge pump I, a material outlet of the steam heating tank is connected with a material inlet of the high-pressure plate-and-frame filter press through a sludge pump II, a gas outlet of the steam heating tank is connected with a hot gas inlet of the spray tower, condensed water of the spray tower is delivered to a sewage treatment plant for treatment, a non-condensable gas outlet of the spray tower is connected with a blower air inlet of the fluidized bed incinerator through a three-way joint, two ports of the three-way joint are respectively connected with the spray tower and the blower, the non-condensable gas is delivered to the incinerator for incineration and deodorization, and the other port is supplied with air; the water outlet of the high-pressure plate-and-frame filter press is connected with the water inlet of the mixing and stirring tank, the temperature of the filtered transparent high-temperature water reaches 70-75 ℃, and the filtered transparent high-temperature water is sent to the mixing and stirring tank for recycling, so that the steam consumption is reduced; the flue gas outlet of the fluidized bed incinerator is connected with the flue gas inlet of the high-temperature air preheater, the air outlet of the high-temperature air preheater is connected with the air chamber inlet of the fluidized bed incinerator, the high-temperature air preheater preheats air to 550 ℃, and then the air is sent to the fluidized bed incinerator for combustion supporting, so that the self-sustaining combustion of sludge in the fluidized bed incinerator is ensured; the flue gas outlet of the high-temperature air preheater is connected with the flue gas inlet of the waste heat boiler; a steam outlet of the waste heat boiler is connected with a steam inlet of the turbonator, an exhaust outlet of the turbonator is connected with a top header of the steam heating tank, superheated steam of 3.82MPa and 400 ℃ generated by the waste heat boiler is sent to the turbonator for power generation, and low-pressure steam is extracted from the turbonator and sent to the steam heating tank for heating sludge; when the sludge treatment capacity with the water content of 80% is less than or equal to 500t/d, the steam generation amount is small, the generated energy is small, and the investment on a turbo generator unit is not economical, so that the steam generated by the waste heat boiler does not pass through the turbo generator for power generation, a steam outlet of the waste heat boiler is connected with a top header of the steam heating tank, part of the steam generated by the waste heat boiler is sent into the steam heating tank, and the rest part of the steam is supplied with steam to the outside; the smoke outlet of the waste heat boiler is connected with the smoke inlet of the low-temperature air preheater, the air outlet of the low-temperature air preheater is connected with the air inlet of the high-temperature air preheater, the air inlet of the low-temperature air preheater is connected with the air outlet of the blower, and the low-temperature air preheater preheats the air to 100-550 ℃ and then sends the air to the high-temperature air preheater to heat the air to 500-550 ℃; and a smoke outlet of the low-temperature air preheater is connected with a tail gas treatment system, and the smoke is treated by the tail gas treatment system and then discharged into the atmosphere after reaching the standard.
The invention has the beneficial effects that: the addition amount of the modifying agent is small, and CaO and FeCl are not added3The heat value of the sludge is higher; after the sludge is subjected to primary filter pressing by a high-pressure plate-and-frame filter press, the water content is reduced to 30-35%, the sludge can be incinerated in a self-sustaining manner, drying devices such as a paddle or a disc drier are not needed, and the investment cost and the operation cost are greatly reduced; make itWhen 1t of sludge containing 80% of water is treated by the method provided by the scheme and is diluted by adding water to 90% of water, the added water amount is 1000kg, only PAM (1-2% tDS) or PAC (4-5% tDS) needs to be added, the total amount is 2000kg, the sludge is heated to 90-100 ℃, low-pressure saturated steam is consumed by 0.133t-0.155t, while the sludge containing 80% of water is treated by the prior art, the water content is reduced to 60% after filter pressing through a plate frame, then the 60% water content is reduced to 30% through a paddle or disc drier, 0.3t of steam needs to be consumed, the steam consumption is about 2 times that of the method, the investment of the paddle or disc drier is large, and the power consumption is high.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a flow chart showing the sludge treatment amount of 500t/d or less.
Detailed Description
Referring to fig. 1 and 2, a sludge steam tempering high-dry dehydration coupling incineration integrated method comprises the steps of adding sludge with the water content of 80%, water and a tempering agent PAM 1-2% tDS or PAC 4-5% tDS into a mixing and stirring tank to be uniformly stirred to obtain sludge with the water content of 90%, then feeding the sludge with the water content of 90% into a steam heating tank to be heated to 90-100 ℃, feeding the sludge with the water content of 90% at 90-100 ℃ into a high-pressure plate-and-frame filter press to be subjected to pressure filtration and dehydration under the pressure of 5.0MPa to obtain a sludge filter cake with the water content of 30-35%; and finally, crushing the sludge filter cake with the water content of 30-35%, and then feeding the crushed sludge filter cake into a fluidized bed incinerator for self-sustaining incineration.
A sludge steam conditioning high-dryness dehydration coupling incineration integrated device comprises a mixing and stirring tank, a steam heating tank, a high-pressure plate-and-frame filter press, a fluidized bed incinerator, a spray tower and a waste heat boiler, wherein a material outlet of the mixing and stirring tank is connected with a material inlet of the steam heating tank through a sludge pump I, a material outlet of the steam heating tank is connected with a material inlet of the high-pressure plate-and-frame filter press through a sludge pump II, a gas outlet of the steam heating tank is connected with a hot gas inlet of the spray tower, condensed water of the spray tower is delivered to a sewage treatment plant for treatment, a non-condensable gas outlet of the spray tower is connected with a blower air inlet of the fluidized bed incinerator through a three-way joint, two ports of the three-way joint are respectively connected with the spray tower and the blower, the non-condensable gas is delivered to the incinerator for incineration and deodorization, and the other port is supplied with air; the water outlet of the high-pressure plate-and-frame filter press is connected with the water inlet of the mixing and stirring tank, the temperature of the filtered transparent high-temperature water reaches 70-75 ℃, and the filtered transparent high-temperature water is sent to the mixing and stirring tank for recycling, so that the steam consumption is reduced; the flue gas outlet of the fluidized bed incinerator is connected with the flue gas inlet of the high-temperature air preheater, the air outlet of the high-temperature air preheater is connected with the air chamber inlet of the fluidized bed incinerator, the high-temperature air preheater preheats air to 550 ℃, and then the air is sent to the fluidized bed incinerator for combustion supporting, so that the self-sustaining combustion of sludge in the fluidized bed incinerator is ensured; the flue gas outlet of the high-temperature air preheater is connected with the flue gas inlet of the waste heat boiler; a steam outlet of the waste heat boiler is connected with a steam inlet of the turbonator, an exhaust outlet of the turbonator is connected with a top header of the steam heating tank, superheated steam of 3.82MPa and 400 ℃ generated by the waste heat boiler is sent to the turbonator for power generation, and low-pressure steam is extracted from the turbonator and sent to the steam heating tank for heating sludge; when the sludge treatment capacity with the water content of 80% is less than or equal to 500t/d, the steam generation amount is small, the generated energy is small, and the investment on a turbo generator unit is not economical, so that the steam generated by the waste heat boiler does not pass through the turbo generator for power generation, a steam outlet of the waste heat boiler is connected with a top header of the steam heating tank, part of the steam generated by the waste heat boiler is sent into the steam heating tank, and the rest part of the steam is supplied with steam to the outside; the smoke outlet of the waste heat boiler is connected with the smoke inlet of the low-temperature air preheater, the air outlet of the low-temperature air preheater is connected with the air inlet of the high-temperature air preheater, the air inlet of the low-temperature air preheater is connected with the air outlet of the blower, and the low-temperature air preheater preheats the air to 100-550 ℃ and then sends the air to the high-temperature air preheater to heat the air to 500-550 ℃; and a smoke outlet of the low-temperature air preheater is connected with a tail gas treatment system, and the smoke is treated by the tail gas treatment system and then discharged into the atmosphere after reaching the standard.
Claims (2)
1. A sludge steam conditioning high-dryness dehydration coupling incineration integrated device is characterized by comprising a mixing and stirring tank, a steam heating tank, a high-pressure plate-and-frame filter press, a fluidized bed incinerator, a spray tower and a waste heat boiler, wherein a material outlet of the mixing and stirring tank is connected with a material inlet of the steam heating tank through a sludge pump I, a material outlet of the steam heating tank is connected with a material inlet of the high-pressure plate-and-frame filter press through a sludge pump II, a gas outlet of the steam heating tank is connected with a hot gas inlet of the spray tower, and a non-condensable gas outlet of the spray tower is connected with an air blower inlet of the fluidized bed incinerator through a three-way joint; the water outlet of the high-pressure plate-and-frame filter press is connected with the water inlet of the mixing and stirring tank; the flue gas outlet of the fluidized bed incinerator is connected with the flue gas inlet of the high-temperature air preheater, and the air outlet of the high-temperature air preheater is connected with the air chamber inlet of the fluidized bed incinerator; the flue gas outlet of the high-temperature air preheater is connected with the flue gas inlet of the waste heat boiler; a steam outlet of the waste heat boiler is connected with a top header of the steam heating tank; the smoke outlet of the waste heat boiler is connected with the smoke inlet of the low-temperature air preheater, the air outlet of the low-temperature air preheater is connected with the air inlet of the high-temperature air preheater, and the air inlet of the low-temperature air preheater is connected with the air outlet of the blower; and a flue gas outlet of the low-temperature air preheater is connected with a tail gas treatment system.
2. The integrated device for sludge steam conditioning, high-dryness dehydration, coupling and incineration as claimed in claim 1, characterized in that a steam outlet of the waste heat boiler is connected with a steam inlet of a steam turbine generator, and an exhaust outlet of the steam turbine generator is connected with a top header of the steam heating tank.
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| CN201910996888.1A CN110590120B (en) | 2019-10-19 | 2019-10-19 | Sludge steam conditioning high-dry dehydration coupling incineration integrated device |
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| CN111299306A (en) * | 2020-03-27 | 2020-06-19 | 江苏辉能环境科技有限公司 | Waste material pyrolysis carbonization treatment device and method |
| CN111268882A (en) * | 2020-03-30 | 2020-06-12 | 西安热工研究院有限公司 | Sludge dry-wet differentiation treatment system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583945A (en) * | 2012-01-13 | 2012-07-18 | 哈尔滨工业大学 | Sludge multi-stage drying device, fluidized bed combustion treatment device and fluidized bed combustion treatment method |
| CN104016564A (en) * | 2014-06-23 | 2014-09-03 | 王子国 | Sludge multi-effect drying incineration treatment system and application method thereof |
| CN104033911A (en) * | 2014-06-30 | 2014-09-10 | 南京德邦金属装备工程股份有限公司 | Sludge drying and incinerating system |
| CN104496133A (en) * | 2014-12-18 | 2015-04-08 | 大连容大资源循环利用咨询设计有限公司 | Moveable oil sludge treatment process |
| CN107804953A (en) * | 2016-09-09 | 2018-03-16 | 景津环保股份有限公司 | A kind of quenched high level cadre's dehydration technique of sludge hot |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583945A (en) * | 2012-01-13 | 2012-07-18 | 哈尔滨工业大学 | Sludge multi-stage drying device, fluidized bed combustion treatment device and fluidized bed combustion treatment method |
| CN104016564A (en) * | 2014-06-23 | 2014-09-03 | 王子国 | Sludge multi-effect drying incineration treatment system and application method thereof |
| CN104033911A (en) * | 2014-06-30 | 2014-09-10 | 南京德邦金属装备工程股份有限公司 | Sludge drying and incinerating system |
| CN104496133A (en) * | 2014-12-18 | 2015-04-08 | 大连容大资源循环利用咨询设计有限公司 | Moveable oil sludge treatment process |
| CN107804953A (en) * | 2016-09-09 | 2018-03-16 | 景津环保股份有限公司 | A kind of quenched high level cadre's dehydration technique of sludge hot |
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