WO2019056183A1 - Système de séchage thermique de boues de régénération - Google Patents

Système de séchage thermique de boues de régénération Download PDF

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Publication number
WO2019056183A1
WO2019056183A1 PCT/CN2017/102309 CN2017102309W WO2019056183A1 WO 2019056183 A1 WO2019056183 A1 WO 2019056183A1 CN 2017102309 W CN2017102309 W CN 2017102309W WO 2019056183 A1 WO2019056183 A1 WO 2019056183A1
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WO
WIPO (PCT)
Prior art keywords
sludge
heat exchanger
condensable gas
surface heat
temperature
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Application number
PCT/CN2017/102309
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English (en)
Chinese (zh)
Inventor
胡俊敏
Original Assignee
深圳市能源环保有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市能源环保有限公司 filed Critical 深圳市能源环保有限公司
Priority to PCT/CN2017/102309 priority Critical patent/WO2019056183A1/fr
Publication of WO2019056183A1 publication Critical patent/WO2019056183A1/fr

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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

Definitions

  • the invention relates to a sludge thermal drying device, in particular to a regenerative sludge thermal drying system.
  • the water content of dewatered sludge in urban sewage treatment plants is generally around 80%. It is neither an ideal viscous fluid nor a Newtonian fluid. It has no fluidity at normal temperature and pressure, and it does not settle when transported in high pressure pipelines. Homogeneous thick paste".
  • the “Standard for Control of Domestic Waste Landfill Pollutants” requires that the sewage treated by the domestic sewage treatment plant can be disposed of in the landfill of the domestic waste landfill after being treated with a moisture content of less than 60%. Therefore, most municipal sludges require deep dewatering or drying, and it is essential to use a pipeline system to transport sludge safely, quickly and efficiently to a disposal (or disposal) location.
  • the resistance loss along the path is large, and it is necessary to rely on the high pressure of the sludge pump to overcome the resistance for transportation. With the increase of export pressure, the cost of sludge pump is also very high, so the transportation system has high energy consumption and high investment.
  • the sludge surface drying machine is the main equipment for domestic sludge drying treatment because of its safety, environmental protection, large processing capacity, small land occupation and high drying efficiency.
  • the rheological properties of the scientifically studied sludge found that the increase in sludge temperature can reduce its viscosity.
  • the existing thermal utilization efficiency of the sludge surface drying system is still improved, for example, insufficient utilization of waste heat and waste heat, resulting in serious waste.
  • the present invention provides a regenerative sludge thermal drying system, which is provided with a surface exchanger on the main pipeline of the sludge inlet of the drying machine, and uses the waste heat of the drying machine and the waste heat to heat the inlet sludge.
  • a surface exchanger on the main pipeline of the sludge inlet of the drying machine, and uses the waste heat of the drying machine and the waste heat to heat the inlet sludge.
  • the solution provided by the present invention is a regenerative sludge thermal drying system, which mainly includes a sludge pump, a sludge inlet pipe, a surface type drying machine, a high temperature saturated steam pipeline, a high temperature condensation water pipe, and a hydrophobic Expanding container, sludge outlet pipe, drying machine evaporation tail gas discharge total pipeline, non-condensable gas discharge pipeline and non-condensable gas blower, non-condensable gas blower is arranged on non-condensable gas discharge pipeline, from said high temperature saturated steam pipe
  • the high-temperature saturated steam of the road heats the surface type drying machine, and the wet sludge enters the surface type drying machine from the sludge inlet pipe, is dried after being heated, and is discharged from the sludge outlet pipe.
  • a surface heat exchanger is further disposed on the sludge inlet pipe.
  • a preferred embodiment of the present invention further includes a direct condensation tank, a cooling water pipe, and a low temperature waste water pipe, and a cold water pipe is further disposed between the surface heat exchanger and the hydrophobic expansion vessel, and the direct condensation tank is disposed at the
  • the surface type drying machine evaporates the exhaust steam exhausting main pipeline, and the tail steam generated during the drying of the sludge passes through the drying machine to discharge the exhaust steam exhausting main pipeline into the direct condensation tank for cooling, and the generated low temperature wastewater is caused by the low temperature
  • the waste water pipe is discharged, and the non-condensable gas is led out by the non-condensable gas discharge pipe, and the high-temperature saturated steam generated from the high-temperature saturated steam pipe is subjected to the high-temperature condensed water generated by the surface type dry machine.
  • a high temperature condensate water pipe is connected to the surface heat exchanger, and cold water after the surface heat exchanger is connected to the hydrophobic expansion vessel through the cold water pipe.
  • a non-condensable gas blower is further disposed on the surface heat exchanger, and the dry evaporator evaporative tail steam exhausting total pipeline is connected to the surface heat exchanger, and the surface heat exchange is performed. Recycling the waste heat of the tail steam, the high-temperature saturated steam is connected to the hydrophobic expansion vessel through the high-temperature condensed water generated by the surface-type drying machine, and the non-condensable gas generated after the tail steam passes through the surface heat exchanger is The non-condensable gas fan is taken out.
  • a cold junction water pipe is further disposed between the surface heat exchanger and the hydrophobic expansion vessel, and a primary surface heat exchanger is further disposed at a front end of the surface heat exchanger, and the primary surface heat exchange is performed.
  • the device also provides a low temperature waste water pipe, and a non-condensable gas fan is further disposed on the primary surface heat exchanger, and the high temperature saturated steam is connected to the surface heat exchanger through the high temperature condensed water generated by the surface type dry machine,
  • the cold water after the surface heat exchanger is connected to the hydrophobic expansion vessel;
  • the dry evaporator evaporation tail gas discharge main pipeline is connected to the primary surface heat exchanger, and the tail steam is subjected to primary surface heat exchange
  • the low-temperature wastewater after the device is discharged from the low-temperature waste water pipe, and the non-condensable gas is taken out by the non-condensable gas fan.
  • the invention provides a regenerative sludge thermal drying system, and a surface exchanger is arranged on the main pipeline of the sludge inlet of the drying machine, and the waste water is heated by the waste heat source of the drying machine to fully utilize the waste heat.
  • a surface exchanger is arranged on the main pipeline of the sludge inlet of the drying machine, and the waste water is heated by the waste heat source of the drying machine to fully utilize the waste heat.
  • FIG. 1 is a schematic structural arrangement diagram of an embodiment of the prior art.
  • Figure 2 is a schematic view showing the arrangement of the first embodiment of the present invention.
  • Figure 3 is a schematic view showing the arrangement of a second embodiment of the present invention.
  • Figure 4 is a schematic view showing the arrangement of a third embodiment of the present invention.
  • FIG. 1 is a schematic structural arrangement diagram of an embodiment of the prior art.
  • a regenerative sludge thermal drying system mainly includes a sludge pump 1, a sludge inlet pipe 2.11, a surface type drying machine 2, a high temperature saturated steam line 2.21, and high temperature condensation.
  • the figure shows that in the prior art, it also includes a direct condensing tank 3, a cooling water pipe 3.21, a low temperature waste pipe 3.22, and a direct condensing tank 3 disposed on the surface drying machine 2 evaporating tail gas discharge main pipe 3.11, sludge drying
  • the tail steam generated by the drying machine is discharged into the direct condensing tank 3 through the evaporation main steam discharge main pipeline 3.11, and the low-temperature wastewater generated by the exhaust steam is discharged from the low-temperature waste pipe 3.22, and the non-condensable gas is discharged through the non-condensable gas discharge pipe 3.12.
  • the condensing gas blower 4 is taken out.
  • the high-temperature saturated steam from the high-temperature saturated steam line 2.21 is passed through the high-temperature condensate water pipe 2.22 to the hydrophobic expansion vessel 5 through the high-temperature condensate water pipe 2.22.
  • Figure 2 is a schematic view showing the arrangement of the structure of the first embodiment of the present invention.
  • the figure shows that, unlike the prior art, in the present example, a surface heat exchanger 6 is further disposed on the sludge inlet pipe 2.11, in the surface type.
  • a cold water pipe 2.23 is further disposed between the heat exchanger 6 and the hydrophobic expansion vessel 5; the high temperature condensed water generated by the high temperature saturated steam from the high temperature saturated steam pipe 2.21 after passing through the surface type drying machine 2 is connected to the high temperature condensation water pipe 2.22.
  • the surface heat exchanger 6, the cold water after passing through the surface heat exchanger 6, is connected to the hydrophobic expansion vessel 5 via the cold water conduit 2.23.
  • the sludge of the sludge inlet pipe 2.11 is heated by the residual heat of 2.23 of high-temperature condensed water.
  • Figure 3 is a schematic view showing the arrangement of a second embodiment of the present invention. The figure shows that, unlike the prior art, in this example, no direct condensation tank is provided.
  • a surface heat exchanger 6 is further disposed on the sludge inlet pipe 2.11, and high-temperature condensed water generated from the high-temperature saturated steam pipe 2.21 through the surface-type drying machine 2 is connected to the hydrophobic water through the high-temperature condensation water pipe 2.22.
  • the expansion vessel 5 the tail gas generated during the drying of the sludge is connected to the surface heat exchanger 6 through the evaporation main steam discharge main pipeline 3.11, and the low-temperature wastewater generated by the sludge is discharged from the low-temperature wastewater pipe 3.22 without being condensed.
  • the gas is led out by the non-condensable gas blower 4 through the non-condensable gas discharge line 3.12.
  • the sludge of the sludge inlet pipe 2.11 is heated by the waste heat of the tail steam generated when the sludge is dried.
  • Figure 4 is a schematic view showing the arrangement of a third embodiment of the present invention. The figure shows that, unlike the prior art, in this example, no direct condensation tank is provided.
  • a surface heat exchanger 6 is also provided on the sludge inlet pipe 2.11 and a primary surface heat exchanger 6.1 is provided before the surface heat exchanger 6.
  • a cold water pipe 2.23 is disposed between the surface heat exchanger 6 and the hydrophobic expansion vessel 5; the high temperature saturated steam from the high temperature saturated steam pipe 2.21 is subjected to high temperature by the high temperature condensed water generated by the surface type drying machine 2.
  • the condensed water pipe 2.22 is connected to the surface heat exchanger 6, and the cold water after the surface heat exchanger 6 is connected to the hydrophobic expansion vessel 5 through the cold water pipe 2.23.
  • a low temperature waste pipe 3.22 is also provided on the primary surface heat exchanger 6.1.
  • the tail steam generated during the drying of the sludge is connected to the primary surface heat exchanger 6.1 through the evaporation main steam exhaust pipe 3.11, and the low-temperature wastewater generated by the sludge is discharged from the low-temperature waste pipe 3.22, and the non-condensable gas is not condensed.
  • the gas discharge line 3.12 is led out by the non-condensable gas blower 4.
  • the sludge of the sludge inlet pipe 2.11 is heated by using the residual heat of the high-temperature condensed water 2.23, and the sludge of the sludge inlet pipe 2.11 is heated by the waste heat of the tail steam generated when the sludge is dried.
  • the residual heat generated by the surface drying machine can fully utilize the waste heat generated when the sludge is dried by the surface drying machine to increase the sludge inlet temperature of the dryer, thereby reducing the heat source of the dryer. Energy consumption achieves maximum energy savings.
  • the flow resistance during sludge transportation can be reduced. Thereby, the heat required for drying the sludge and the power required to transport the sludge are reduced, and the energy saving and consumption reduction effects are maximized.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Drying Of Solid Materials (AREA)
  • Treatment Of Sludge (AREA)

Abstract

Un système de séchage thermique de boue de régénération comprenant principalement une pompe à boue (1), un tuyau d'entrée de boue (2.11), un appareil de séchage de surface (2), une conduite de vapeur saturée à haute température (2.21), un tube de condensat à haute température (2.22), un réservoir de détente d'évacuation (5), un tuyau de sortie de boue (2.12), une conduite d'évacuation de la vapeur d'échappement provenant de l'appareil de séchage (3.11), une conduite de drainage de gaz non condensable (3.12) et un ventilateur de gaz non condensable (4); le ventilateur de gaz non condensable (4) est situé sur la conduite de drainage de gaz non condensable (3.12); de la vapeur saturée à haute température provenant de la conduite de vapeur saturée à haute température (2.21) est en mesure de chauffer l'appareil de séchage de surface (2); la boue humide entre dans l'appareil de séchage de surface (2) par le tuyau d'entrée de boue (2.11), se transforme en un état sec après avoir été chauffée puis est évacuée du tuyau de sortie de boue (2.12); un échangeur de chaleur de surface (6) est de plus aménagé sur le tuyau d'entrée de boue (2.11).
PCT/CN2017/102309 2017-09-19 2017-09-19 Système de séchage thermique de boues de régénération WO2019056183A1 (fr)

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PCT/CN2017/102309 WO2019056183A1 (fr) 2017-09-19 2017-09-19 Système de séchage thermique de boues de régénération

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110482826A (zh) * 2019-07-19 2019-11-22 中国市政工程中南设计研究总院有限公司 基于mvr与真空组合工艺的污泥梯级干化系统及方法
CN110790475A (zh) * 2019-11-22 2020-02-14 山西平朔煤矸石发电有限责任公司 火电厂烟气再循环耦合污泥干化在线掺烧系统
CN114249517A (zh) * 2020-09-23 2022-03-29 中国电力工程顾问集团华东电力设计院有限公司 一种污泥圆盘干化系统及干化工艺
CN114368895A (zh) * 2021-12-14 2022-04-19 周洋 一种污水淤泥无害化回收系统
CN114671588A (zh) * 2022-03-09 2022-06-28 广州晟启能源设备有限公司 一种污泥处理系统及污泥处理方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457203B1 (fr) * 1990-05-18 1993-09-29 SC Technology AG Procédé de séchage sans émissions d'une substance dans un tambour de séchage
CN102992575A (zh) * 2012-12-14 2013-03-27 中国石油天然气集团公司 蒸汽热循环污泥干化的方法及系统
CN104986934A (zh) * 2015-06-05 2015-10-21 李学文 一种连续式污泥热分解方法和装置
CN105439404A (zh) * 2015-12-31 2016-03-30 无锡国联环保科技股份有限公司 一种污泥脱水干化焚烧系统及方法
CN106630540A (zh) * 2017-01-20 2017-05-10 广东新环环保产业集团有限公司 一种高效节能污泥干化系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457203B1 (fr) * 1990-05-18 1993-09-29 SC Technology AG Procédé de séchage sans émissions d'une substance dans un tambour de séchage
CN102992575A (zh) * 2012-12-14 2013-03-27 中国石油天然气集团公司 蒸汽热循环污泥干化的方法及系统
CN104986934A (zh) * 2015-06-05 2015-10-21 李学文 一种连续式污泥热分解方法和装置
CN105439404A (zh) * 2015-12-31 2016-03-30 无锡国联环保科技股份有限公司 一种污泥脱水干化焚烧系统及方法
CN106630540A (zh) * 2017-01-20 2017-05-10 广东新环环保产业集团有限公司 一种高效节能污泥干化系统

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110482826A (zh) * 2019-07-19 2019-11-22 中国市政工程中南设计研究总院有限公司 基于mvr与真空组合工艺的污泥梯级干化系统及方法
CN110790475A (zh) * 2019-11-22 2020-02-14 山西平朔煤矸石发电有限责任公司 火电厂烟气再循环耦合污泥干化在线掺烧系统
CN114249517A (zh) * 2020-09-23 2022-03-29 中国电力工程顾问集团华东电力设计院有限公司 一种污泥圆盘干化系统及干化工艺
CN114368895A (zh) * 2021-12-14 2022-04-19 周洋 一种污水淤泥无害化回收系统
CN114671588A (zh) * 2022-03-09 2022-06-28 广州晟启能源设备有限公司 一种污泥处理系统及污泥处理方法

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