WO2022089157A1 - 一种污泥减量化处理的系统和方法 - Google Patents
一种污泥减量化处理的系统和方法 Download PDFInfo
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- WO2022089157A1 WO2022089157A1 PCT/CN2021/122280 CN2021122280W WO2022089157A1 WO 2022089157 A1 WO2022089157 A1 WO 2022089157A1 CN 2021122280 W CN2021122280 W CN 2021122280W WO 2022089157 A1 WO2022089157 A1 WO 2022089157A1
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- sludge
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- storage tank
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- 239000010802 sludge Substances 0.000 title claims abstract description 212
- 238000000034 method Methods 0.000 title claims abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003546 flue gas Substances 0.000 claims abstract description 32
- 239000002918 waste heat Substances 0.000 claims abstract description 29
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 15
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000004062 sedimentation Methods 0.000 claims description 12
- 239000010865 sewage Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000013589 supplement Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 238000006722 reduction reaction Methods 0.000 description 21
- 239000002585 base Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 208000005156 Dehydration Diseases 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N Heavy water Chemical compound [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000010335 hydrothermal treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000009089 cytolysis Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Images
Classifications
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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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Definitions
- the present invention relates to a system and method for sludge reduction treatment.
- Chinese patent document CN103204611A is based on microwave radiation heating, using inorganic acid or inorganic base to adjust the pH of the mud-water mixture to improve the lysis efficiency of activated sludge and achieve sludge reduction.
- the main heat source is microwave heating, which still has the defect of high energy consumption;
- Chinese patent document CN107892456A discloses a method for efficient reduction of municipal sludge, which adopts anaerobic digestion. It is also necessary to perform hydrothermal treatment on the sludge after anaerobic digestion.
- the hydrothermal treatment temperature is above 140 °C, and additional heat sources are still required for heating, and the price paid is still high energy consumption and high cost.
- the technical problem to be solved by the present invention is to overcome the defects of high cost and low sludge treatment efficiency in the sludge treatment process in the prior art, and to provide a system and method for sludge reduction treatment.
- the present invention controls the amount of sludge by combining thermal-chemical treatment, with high treatment efficiency and low cost.
- a system for sludge reduction treatment comprising a sludge storage tank, a sludge dewatering device, a sludge incinerator and a waste heat boiler;
- the sludge storage tank is provided with a reagent input port, a first sludge outlet, and a steam inlet;
- the sludge dewatering device is provided with a first sludge inlet and a second sludge outlet;
- the sludge incinerator is provided with a second sludge inlet and a flue gas outlet;
- the waste heat boiler is provided with a flue gas inlet and a steam outlet; the flue gas inlet is arranged at the middle and lower part of the waste heat boiler; the steam outlet is arranged at the middle and upper part of the waste heat boiler;
- the reagent input port is used for adding acid-base reagent
- the first sludge outlet on the sludge storage tank is connected to the first sludge inlet on the sludge dewatering device;
- the second sludge outlet on the sludge dewatering device is connected with the second sludge inlet on the sludge incinerator;
- the flue gas outlet is arranged in the middle and upper part of the sludge incinerator, and the flue gas outlet is connected with the flue gas inlet on the waste heat boiler;
- the steam outlet on the waste heat boiler is connected with the steam inlet on the mud storage tank.
- the sludge reduction treatment system may further include an acid-base storage device, the outlet of the acid-base storage device is connected to the reagent input port on the mud storage tank.
- a steam pipe is provided in the mud storage tank, and the steam pipe is located in the middle and lower part of the mud storage tank and is parallel to the bottom surface of the mud storage tank.
- a plurality of steam injection pipes are arranged on the steam pipe, the steam injection pipes are communicated with the steam pipe, and the steam injection pipes are parallel to the bottom surface of the mud storage tank; the steam injection pipes One end of the tube is provided with a steam jet head.
- the steam injection pipe is vertically arranged with the steam pipe.
- both ends of the steam injection pipe are provided with steam injection heads.
- the mud storage tank is a rectangular tank, and the bottom of the mud storage tank is divided into two rectangular cells; the steam pipe spans the two rectangular cells, and parallel to the long side of the rectangular pool;
- Each of the rectangular cells is provided with two steam injection pipes, the steam injection pipes are vertically arranged with the steam pipeline, and both ends of the steam injection pipes are provided with steam injection heads;
- the steam jet head is arranged facing the bottom of the mud storage tank.
- the sludge incinerator is provided with a third sludge inlet, which is used to supplement sludge.
- the system for sludge reduction treatment may further include a sludge pretreatment unit, the inlet of the sludge pretreatment unit is used to input pretreated sewage, and the sludge pretreatment unit is used for inputting pretreated sewage.
- the mud outlet of the unit is connected with the fourth mud inlet provided on the mud storage tank.
- the sludge pretreatment unit may include a sludge sedimentation tank and a sludge concentration tank connected in sequence.
- the sludge sedimentation tank is further provided with a water outlet for outputting the filtered water produced after sludge sedimentation.
- the sludge dewatering device is preferably provided with a water outlet for discharging the filtered water in the sludge.
- the present invention also provides a sludge reduction treatment method, which adopts the above sludge reduction treatment system, which includes the following processing steps: inputting the pH-adjusted and heated sludge from the first sludge outlet to the sludge dewatering device; then the dehydrated sludge is incinerated in the sludge incinerator, and the flue gas generated after incineration enters through the flue gas inlet on the waste heat boiler, and the The steam generated by the waste heat boiler is introduced through the steam inlet on the mud storage tank.
- the pH value is 5-12.
- the heating generally refers to heating the sludge to 40-70°C.
- the reagents and raw materials used in the present invention are all commercially available.
- the present invention realizes the reduction of sludge through thermal-chemical treatment, and on the basis of "water, mud, gas” synergistic treatment, fully utilizes the heat of the sludge itself, and reduces the demand for external energy.
- the steam is uniformly heated, which helps to improve the uniform heating area of the sludge and reduces the corrosion of equipment due to high temperature changes.
- FIG. 1 is a schematic diagram of the system of sludge reduction treatment in Example 1.
- FIG. 1 is a schematic diagram of the system of sludge reduction treatment in Example 1.
- FIG. 2 is a process plan view of the mud storage tank of Example 1.
- FIG. 2 is a process plan view of the mud storage tank of Example 1.
- FIG. 3 is a cross-sectional view at 1-1 in FIG. 2 .
- FIG. 1 to 3 1 raw reaction tank, 2 sludge sedimentation tank, 3 sludge concentration tank, 4 acid-base storage device, 5 sludge storage tank, 501 reagent input port, 502 steam inlet, 503 first sludge outlet, 6 sludge dewatering device, 601 first sludge inlet, 602 second sludge outlet, 7 sludge incinerator, 701 second sludge inlet, 702 flue gas outlet, 703 third sludge inlet, 8 waste heat boiler, 801 Flue gas inlet, 802 steam outlet, 9 steam jet heads, 10 steam jet pipes, 11 steam pipes.
- the system for sludge reduction treatment as shown in FIG. 1 includes a sludge storage tank 5, a sludge dewatering device 6, a sludge incinerator 7 and a waste heat boiler 8;
- the sludge storage tank 5 is provided with a reagent input port 501, The first sludge outlet 503 and the steam inlet 502;
- the sludge dewatering device 6 is provided with a first sludge inlet 601 and a second sludge outlet 602;
- the sludge incinerator 7 is provided with a second sludge inlet 701 and a second sludge inlet 602.
- the waste heat boiler 8 is provided with a flue gas inlet 801 and a steam outlet 802; the flue gas inlet 801 is arranged in the middle and lower part of the waste heat boiler 8;
- the reagent input port 501 is used for adding acid-base reagents; the first sludge outlet 503 on the sludge storage tank 5 is connected to the first sludge inlet 601 on the sludge dewatering device 6; the second sludge dewatering device 6 is connected.
- the sludge outlet 602 is connected to the second sludge inlet 701 on the sludge incinerator 7; the third sludge inlet 703 is used to supplement sludge; the flue gas outlet 702 is arranged in the upper middle of the sludge incinerator 7, and the flue gas
- the outlet 702 is connected with the flue gas inlet 801 on the waste heat boiler 8 ; the steam outlet 802 on the waste heat boiler 8 is connected with the steam inlet 502 on the mud storage tank 5 .
- the system for sludge reduction treatment further includes an acid-base storage device 4 , and the outlet of the acid-base storage device 4 is connected to the reagent input port 501 on the mud storage tank 5 .
- the bottom surface of the mud storage tank 5 is a rectangle, and a steam pipe 11 is arranged in the mud storage tank 5 .
- the steam pipe 11 runs through the mud storage tank 5 along the length direction of the bottom surface; the bottom of the mud storage tank 5 is divided into two grids, each grid is provided with two steam injection pipes 10, the steam injection pipes 10 are communicated with the steam pipe 11, and
- the steam injection pipe 10 is parallel to the bottom surface of the mud storage tank 5 ; both ends of the steam injection pipe 10 are provided with steam injection heads 9 ; the steam injection pipe 10 is perpendicular to the steam pipe 11 .
- the system for sludge reduction treatment further includes a sludge pretreatment unit, which includes a sludge sedimentation tank 2 and a sludge concentration tank 3 connected in sequence; an inlet on the sludge sedimentation tank 2
- the sewage outlet on the raw-reaction tank 1 is connected, and after sedimentation and concentration, the sludge outlet on the sludge concentration tank 3 is connected with the fourth sludge inlet provided on the sludge storage tank 5 .
- the water outlet provided on the sludge sedimentation tank 2 is connected with the water inlet of the raw reaction tank 1;
- the sludge dewatering device 6 is provided with a water outlet, and the water outlet on the sludge dewatering device 6 is connected with the water inlet on the raw-reaction tank 1 .
- Embodiment 2 The method of sludge reduction treatment
- This embodiment adopts the treatment system of Embodiment 1.
- the pretreated sewage enters the bioreaction tank 1, and then the concentrated sludge generated by the sludge sedimentation tank 2 and the sludge concentration tank 3 enters the sludge storage tank 5, and is stored by acid and alkali.
- the device 4 adds acid or alkali preparations to the sludge storage tank 5 to adjust the pH value of the sludge in the sludge storage tank; the steam generated by the waste heat boiler 8 is sprayed into the sludge storage tank 5 to heat it up, and the heated sludge enters the sludge storage tank 5.
- the dehydration device 6 performs dehydration treatment, the dewatered sludge produced is incinerated in the incinerator 7, and the flue gas generated by the incineration enters the subsequent flue gas treatment system through the waste heat boiler 8, and is discharged after the treatment reaches the standard, and the steam generated by the waste heat boiler 8 is passed into the storage tank.
- the sludge tank 5 is heated by the steam ejector 9 to heat up the sludge.
- the sludge storage tank is divided into 2 grids, the size of a single grid is 14 meters ⁇ 14 meters ⁇ 3.4 meters, and the designed mud feeding capacity of a single grid is 1000t/d. According to the working conditions The amount of steam discharged from the bottom and the temperature rise of sludge in the sludge storage tank are shown in the table below.
- the steam discharge capacity of the single-cell sludge tank is controlled, so that the sludge discharge temperature of the sludge storage tank is 58 °C, the pH of the sludge storage tank is controlled to be 11 by adding NaOH, and the residence time is 10h.
- the VSS dissolution rate is increased by 17% compared with the general conditions.
- the sludge volume index (SVI) will decrease when the temperature rises at the same sludge discharge temperature. /g TSS decreased to 112mL/g TSS.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treatment Of Sludge (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Description
序号 | 项目 | 数值 | 单位 |
1 | 污泥储泥池 | 2 | 格 |
2 | 单格储泥池长度 | 14 | m |
3 | 单格储泥池宽度 | 14 | m |
4 | 单格储泥池深度 | 3.4 | m |
5 | 单格储泥池设计进泥量 | 1000 | t/d |
6 | 单格喷头设计蒸汽喷入量 | 1.5 | t/h |
7 | 单格泥池喷头数量 | 4 | 只 |
8 | 单格泥池排放能力 | 6 | t/h |
9 | 单格泥池实际蒸汽喷入量 | 2.4 | t/h |
10 | 单格储泥池设计进泥量 | 42 | t/h |
11 | 单格储泥池进泥温度 | 25 | ℃ |
12 | 储泥池温升 | 32.9 | ℃ |
13 | 储泥池出泥温度 | 57.9 | ℃ |
Claims (9)
- 一种污泥减量化处理的系统,其特征在于,其包括储泥池、污泥脱水装置、污泥焚烧炉和余热锅炉;所述储泥池上设有试剂投入口、第一污泥出口、和蒸汽入口;所述储泥池中设有一蒸汽管道,所述蒸汽管道位于所述储泥池的中下部、且与所述储泥池的底面平行;所述污泥脱水装置上设有第一污泥入口、第二污泥出口;所述污泥焚烧炉上设有第二污泥入口和烟气出口;所述余热锅炉上设有烟气入口和蒸汽出口;所述烟气入口设于所述余热锅炉的中下部;所述蒸汽出口设于所述余热锅炉的中上部;所述试剂投入口用于投加酸碱试剂;所述储泥池上的所述第一污泥出口与所述污泥脱水装置上的所述第一污泥入口连接;所述污泥脱水装置上的所述第二污泥出口与所述污泥焚烧炉上的所述第二污泥入口连接;所述烟气出口设于所述污泥焚烧炉的中上部、且所述烟气出口与所述余热锅炉上的所述烟气入口连接;所述余热锅炉上的所述蒸汽出口与所述储泥池上的蒸汽入口连接。
- 如权利要求1所述的污泥减量化处理的系统,其特征在于,所述污泥减量化处理的系统还包括一酸碱储存装置,所述酸碱储存装置的出口与所述储泥池上的所述试剂投入口连接;和/或,所述污泥焚烧炉上设有第三污泥入口,其用于补充污泥。
- 如权利要求1所述的污泥减量化处理的系统,其特征在于,所述蒸汽管道上设有若干蒸汽喷射管,所述蒸汽喷射管与所述蒸汽管道连通、且所述蒸汽喷射管与所述储泥池的底面平行;所述蒸汽喷射管的一端设有蒸汽喷射头;较佳地,所述蒸汽喷射管垂直于与所述蒸汽管道垂直设置。
- 如权利要求3所述的污泥减量化处理的系统,其特征在于,所述蒸汽喷射管的两端均设有所述蒸汽喷射头。
- 如权利要求3所述的污泥减量化处理的系统,其特征在于,所述储泥池为一矩形池,所述储泥池的底部分为2个矩形单元格;所述蒸汽管道横跨所述2个矩形单元格、且与所述矩形池的长边平行;每一所述矩形单元格中均设有两个所述蒸汽喷射管,所述蒸汽喷射管与所述蒸汽管道垂直设置,所述蒸汽喷射管的两端均设有蒸汽喷射头;所述蒸汽喷射头面向所述储泥池的底部设置。
- 如权利要求1所述的污泥减量化处理的系统,其特征在于,所述污泥减量化处理的系统还包括污泥预处理单元,所述污泥预处理单元的入口用于输入经预处理的污水,所述污泥预处理单元的出泥口与所述储泥池上设有的第四污泥入口连接。
- 如权利要求6所述的污泥减量化处理的系统,其特征在于,所述污泥预处理单元包括依次连接的污泥沉淀池和污泥浓缩池;较佳地,所述污泥沉淀池上还设有出水口。
- 如权利要求1所述的污泥减量化处理的系统,其特征在于,所述污泥脱水装置上设有出水口。
- 一种污泥减量化处理方法,其特征在于,其采用如权利要求1~8任一项所述的污泥减量化处理的系统,其包括如下处理步骤:将调节pH和加热后的污泥由所述第一污泥出口输入至所述污泥脱水装置;再将脱水后的污泥在所述污泥焚烧炉中进行焚烧,焚烧后产生的烟气由所述余热锅炉上的所述烟气入口进入,并将所述余热锅炉产生的蒸汽由所述储泥池上的所述蒸汽入口通入。
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