WO2019056183A1 - Regenerative sludge heat drying system - Google Patents
Regenerative sludge heat drying system Download PDFInfo
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- 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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- sludge
- heat exchanger
- condensable gas
- surface heat
- temperature
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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)
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Abstract
A regenerative sludge heat drying system, mainly comprising a sludge pump (1), a sludge inlet pipe (2.11), a surface type drying machine (2), a high-temperature saturated steam pipeline (2.21), a high-temperature condensate tube (2.22), a drain flash tank (5), a sludge outlet pipe (2.12), a drying machine evaporated exhaust steam drainage header pipeline (3.11), a non-condensable gas drainage pipeline (3.12) and a non-condensable gas fan (4); the non-condensable gas fan (4) is provided on the non-condensable gas drainage pipeline (3.12); high-temperature saturated steam from the high-temperature saturated steam pipeline (2.21) can heat the surface type drying machine (2); wet sludge enters the surface type drying machine (2) from the sludge inlet pipe (2.11), turns into a dried state after being heated and then is drained out from the sludge outlet pipe (2.12); and a surface type heat exchanger (6) is further provided on the sludge inlet pipe (2.11).
Description
本发明涉及污泥热干化设备，尤其涉及一种回热法污泥热干化***。The invention relates to a sludge thermal drying device, in particular to a regenerative sludge thermal drying system.
目前，城市污水处理厂脱水污泥含水率一般在80％左右，它既不是理想粘滞性流体，也不是牛顿流体，在常温常压下无流动性，在高压管道输送时呈“不沉降似均质浓密膏体”。At present, 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".
《生活垃圾填埋污染物控制标准》要求：生活污水处理厂污泥经处理后含水率小于60％可以进入生活垃圾填埋场填埋处置。因此，大多数市政污泥需要深度脱水或干化处理，采用管道输送***将污泥安全、快捷、高效地输送至处理(或处置)地点，是必不可少的环节。但由于污泥流动性差，沿程阻力损失较大，需要依靠污泥泵高压来克服阻力进行输送。随着出口压力的提高，污泥泵造价也十分高昂，因此输送***能耗高，投入高。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. However, due to the poor fluidity of the sludge, 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.
污泥表面式干化机因其安全、环保、处理量大、占地少、干化效率高等特点，是国内污泥干化处理主要设备。另外，经科学研究污泥的流变特性发现：污泥温度的提高可以减少其粘度。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. In addition, the rheological properties of the scientifically studied sludge found that the increase in sludge temperature can reduce its viscosity.
目前情况是，现有污泥表面式干化***综合热力利用效能还有提高之处，例如对余热和废热没有充分的利用，造成严重浪费。At present, 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.
发明内容Summary of the invention
为了解决现有技术问题，本发明提出一种回热法污泥热干化***，在干化机污泥入口总管路上设置表面式交换器，利用干化机余热及废热加热进口污泥，充分利用余热提高干化机污泥入口温度，从而降低干化机热源能耗，实现最大限度节能，同时因为污泥温度的提高可以降低污泥输送过程中的流动阻力，减少了干化污泥所需热量以及输送污泥所需动力。In order to solve the problems of the prior art, 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. Using waste heat to increase the inlet temperature of the sludge of the dryer, thereby reducing the energy consumption of the heat source of the dryer, achieving maximum energy saving, and at the same time, the sludge resistance can reduce the flow resistance during the sludge transportation process and reduce the drying sludge. The heat required and the power required to transport the sludge.
本发明解决技术问题所提供方案是，一种回热法污泥热干化***，主要包括污泥泵、污泥入口管道、表面式干化机、高温饱和蒸汽管路、高温凝结水管、疏水扩容器、污泥出口管道、干化机蒸发尾汽排放总管路、不凝气体排放管路及不凝气体风机，不凝气体风机设置在不凝气体排放管路上，来自所述高温饱和蒸汽管路的高温饱和蒸汽对表面式干化机进行加热，湿污泥从所述污泥入口管道进入所述表面式干化机、经加热处理后呈干化状态然后从所述污泥出口管道排出，其特征是，在所述污泥入口管道上还设置表面式热交换器。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.
本发明的优选方案，还包括直接冷凝罐、冷却水管、低温废水管，在所述表面式热交换器与所述疏水扩容器之间还设置冷结水管，所述直接冷凝罐设置在所述表面式干化机蒸发尾汽排放总管路上，污泥干化时产生的尾汽经所述干化机蒸发尾汽排放总管路进入所述直接冷凝罐进行冷却，产生的低温废水由所述低温废水管排出，而不凝气体经不凝气体排放管路由所述不凝气体风机引出，来自高温饱和蒸汽管路的高温饱和蒸汽经所述表面式干化机之后产生的高温凝结水经所述高温凝结水管接入到所述表面式热交换器，经表面式热交换器之后的冷结水经所述冷结水管接入至疏水扩容器。
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.
本发明的优选方案，在表面式热交换器上还设置不凝气体风机，所述干化机蒸发尾汽汽排放总管路接入至所述表面式热交换器，由所述表面式热交换器对尾汽的余热进行回收，高温饱和蒸汽经所述表面式干化机之后产生的高温凝结水接入至疏水扩容器，尾汽经表面式热交换器之后产生的不凝气体由所述不凝气体风机引出。In a preferred embodiment of the present invention, 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.
本发明的优选方案，在所述表面式热交换器与所述疏水扩容器之间还设置冷结水管，在表面式热交换器的前端还设置初级表面式热交换器，初级表面式热交换器还设置低温废水管，在初级表面热交换器上还设置不凝气体风机，高温饱和蒸汽经所述表面式干化机之后产生的高温凝结水接入到所述表面式热交换器，经所述表面式热交换器之后的冷结水接入至疏水扩容器；所述干化机蒸发尾汽排放总管路接入至所述初级表面式热交换器，尾汽经初级表面式热交换器之后的低温废水由所述低温废水管排出、而不凝气体由所述不凝气体风机引出。In a preferred embodiment of the present invention, 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.
本发明的有益效果：本发明提出一种回热法污泥热干化***，在干化机污泥入口总管路上设置表面式交换器，利用干化机热源废热加热进口污泥，充分利用余热提高干化机污泥入口温度，从而降低干化机热源能耗，实现最大限度节能，同时因为污泥温度的提高可以降低污泥输送过程中的流动阻力，减少了干化污泥所需热量以及输送污泥所需动力。The invention has the following advantages: 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. Increasing the inlet temperature of the sludge of the dryer, thereby reducing the energy consumption of the heat source of the dryer, achieving maximum energy saving, and at the same time, the sludge temperature can reduce the flow resistance during the sludge transportation process and reduce the heat required for the sludge. And the power required to transport the sludge.
图1为现有技术一个实施例的结构布置示意图。FIG. 1 is a schematic structural arrangement diagram of an embodiment of the prior art.
图2为本发明第一个实施例的结构布置示意图。Figure 2 is a schematic view showing the arrangement of the first embodiment of the present invention.
图3为本发明第二个实施例的结构布置示意图。Figure 3 is a schematic view showing the arrangement of a second embodiment of the present invention.
图4为本发明第三个实施例的结构布置示意图。Figure 4 is a schematic view showing the arrangement of a third embodiment of the present invention.
图中：In the picture:
1.污泥泵，1. Sludge pump,
2.表面式干化机，2. Surface drying machine,
2.11污泥入口管道、2.12污泥出口管道，2.11 sludge inlet pipe, 2.12 sludge outlet pipe,
2.21高温饱和蒸汽管路、2.22高温凝结水管路，2.23凝结水；2.21 high temperature saturated steam pipeline, 2.22 high temperature condensate pipeline, 2.23 condensed water;
3.直接冷凝罐，3. Direct condensation tank,
3.11干化机蒸发尾汽排放总管路、3.12不凝气体排放管路，3.11 Drying machine evaporation tail steam discharge total pipeline, 3.12 non-condensable gas discharge pipeline,
3.21冷却水管、3.22低温废水管，3.21 cooling water pipe, 3.22 low temperature wastewater pipe,
4不凝气体风机，4 non-condensable gas fans,
5疏水扩容器，5 hydrophobic expansion containers,
6表面式热交换器，6 surface heat exchanger,
6.1初级表面式热交换器。
6.1 Primary surface heat exchanger.
图1为现有技术一个实施例的结构布置示意图。图中显示，现有技术中，一种回热法污泥热干化***，主要包括污泥泵1、污泥入口管道2.11、表面式干化机2、高温饱和蒸汽管路2.21、高温凝结水管2.22、疏水扩容器5、污泥出口管道2.12、干化机蒸发尾汽排放总管路3.11、不凝气体排放管路3.12，来自高温饱和蒸汽管路2.21的高温饱和蒸汽对表面式干化机2进行加热，湿污泥从污泥入口管道2.11进入表面式干化机2、经加热处理后呈干化状态从污泥出口管道2.22排出。图中显示，现有技术中，还包括直接冷凝罐3、冷却水管3.21、低温废水管3.22，直接冷凝罐3设置在表面式干化机2蒸发尾汽排放总管路3.11上，污泥干化时产生的尾汽经干化机蒸发尾汽排放总管路3.11进入直接冷凝罐3进行冷却，其产生的低温废水由低温废水管3.22排出，而不凝气体经不凝气体排放管路3.12由不凝气体风机4引出。来自高温饱和蒸汽管路2.21的高温饱和蒸汽经表面式干化机2之后产生的高温凝结水经高温凝结水管2.22接入至疏水扩容器5中。FIG. 1 is a schematic structural arrangement diagram of an embodiment of the prior art. The figure shows that in 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. Water pipe 2.22, hydrophobic expansion container 5, sludge outlet pipe 2.12, dry machine evaporation tail gas discharge total pipeline 3.11, non-condensable gas discharge pipeline 3.12, high temperature saturated steam from surface of high temperature saturated steam pipeline 2.11 2 Heating, the wet sludge enters the surface type drying machine 2 from the sludge inlet pipe 2.11, and is dried and discharged from the sludge outlet pipe 2.22. 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.
图2为本发明第一个实施例的结构布置示意图，图中显示，与现有技术不同的是，本例中，在污泥入口管道2.11上还设置表面式热交换器6，在表面式热交换器6与疏水扩容器5之间还设置冷结水管2.23；来自高温饱和蒸汽管路2.21的高温饱和蒸汽经表面式干化机2之后产生的高温凝结水经高温凝结水管2.22接入到表面式热交换器6，经表面式热交换器6之后的冷结水经冷结水管2.23接入至疏水扩容器5中。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.
本例中，利用高温凝结水2.23的余热对污泥入口管道2.11的污泥进行加热。In this example, the sludge of the sludge inlet pipe 2.11 is heated by the residual heat of 2.23 of high-temperature condensed water.
图3为本发明第二个实施例的结构布置示意图。图中显示，与现有技术不同的是，本例中，没有设置直接冷凝罐。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.
而在污泥入口管道2.11上还设置表面式热交换器6，来自高温饱和蒸汽管路2.21的高温饱和蒸汽经表面式干化机2之后产生的高温凝结水经高温凝结水管2.22接入到疏水扩容器5中；污泥干化时产生的尾汽经干化机蒸发尾汽排放总管路3.11接入到表面式热交换器6，其产生的低温废水由低温废水管3.22排出，而不凝气体经不凝气体排放管路3.12由不凝气体风机4引出。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. In 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.
本例中，利用污泥干化时产生的尾汽余热对污泥入口管道2.11的污泥进行加热。In this example, 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.
图4为本发明第三个实施例的结构布置示意图。图中显示，与现有技术不同的是，本例中，没有设置直接冷凝罐。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.
在污泥入口管道2.11上还设置表面式热交换器6并在表面式热交换器6之前设置初级表面式热交换器6.1。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.
一方面，在表面式热交换器6与疏水扩容器5之间还设置冷结水管2.23；来自高温饱和蒸汽管路2.21的高温饱和蒸汽经表面式干化机2之后产生的高温凝结水经高温凝结水管2.22接入到表面式热交换器6，经表面式热交换器6之后的冷结水经冷结水管2.23接入至疏水扩容器5中。On one hand, 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.
另一方面，在初级表面式热交换器6.1上还设置低温废水管3.22。污泥干化时产生的尾汽经干化机蒸发尾汽排放总管路3.11接入到初级表面式热交换器6.1，其产生的低温废水由低温废水管3.22排出，而不凝气体经不凝气体排放管路3.12由不凝气体风机4引出。
On the other hand, 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.
本例中，既利用高温凝结水2.23的余热对污泥入口管道2.11的污泥进行加热，同时又利用污泥干化时产生的尾汽余热对污泥入口管道2.11的污泥进行加热。In this example, 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.
本发明提出的上述各种实施例，通过不同的余热利用方式，可以充分利用表面式干化机对污泥进行干化时产生的余热提高干化机污泥入口温度，从而降低干化机热源能耗实现最大限度节能。同时因为污泥入口温度的提高又能够降低污泥输送过程中的流动阻力。从而减少了干化污泥所需热量以及输送污泥所需动力，最大限度的发挥节能减耗作用。
According to the various embodiments of the present invention, 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. At the same time, because of the increase of sludge inlet temperature, 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.
Claims (4)
- 一种回热法污泥热干化***，主要包括污泥泵、污泥入口管道、表面式干化机、高温饱和蒸汽管路、高温凝结水管、疏水扩容器、污泥出口管道、干化机蒸发尾汽排放总管路、不凝气体排放管路及不凝气体风机，不凝气体风机设置在不凝气体排放管路上，来自所述高温饱和蒸汽管路的高温饱和蒸汽对表面式干化机进行加热，湿污泥从所述污泥入口管道进入所述表面式干化机、经加热处理后呈干化状态然后从所述污泥出口管道排出，其特征是，在所述污泥入口管道上还设置表面式热交换器。A regenerative sludge thermal drying system mainly comprises a sludge pump, a sludge inlet pipeline, a surface drying machine, a high temperature saturated steam pipeline, a high temperature condensation water pipe, a hydrophobic expansion vessel, a sludge outlet pipeline, and a drying The machine evaporates the tail gas discharge total pipeline, the non-condensable gas discharge pipeline and the non-condensable gas blower, the non-condensable gas blower is disposed on the non-condensable gas discharge pipeline, and the high-temperature saturated steam from the high-temperature saturated steam pipeline is surface-dried The machine performs heating, and the wet sludge enters the surface type drying machine from the sludge inlet pipe, is dried in a heat-treated state, and is discharged from the sludge outlet pipe, wherein the sludge is A surface heat exchanger is also provided on the inlet pipe.
- 根据权利要求1所述的一种回热法污泥热干化***，其特征是，还包括直接冷凝罐、冷却水管、低温废水管，在所述表面式热交换器与所述疏水扩容器之间还设置冷结水管，所述直接冷凝罐设置在所述表面式干化机蒸发尾汽排放总管路上，污泥干化时产生的尾汽经所述干化机蒸发尾汽排放总管路进入所述直接冷凝罐进行冷却，产生的低温废水由所述低温废水管排出，而不凝气体经不凝气体排放管路由所述不凝气体风机引出，来自高温饱和蒸汽管路的高温饱和蒸汽经所述表面式干化机之后产生的高温凝结水经所述高温凝结水管接入到所述表面式热交换器，经表面式热交换器之后的冷结水经所述冷结水管接入至疏水扩容器。A regenerative sludge thermal drying system according to claim 1, further comprising a direct condensation tank, a cooling water pipe, a low temperature waste pipe, and the surface heat exchanger and the hydrophobic expansion container A cold water pipe is further disposed between the direct condensation tank and the evaporation tail gas discharge total pipeline of the surface type drying machine, and the exhaust steam generated by the sludge drying is discharged through the drying machine Entering the direct condensing tank for cooling, the generated low-temperature wastewater is discharged from the low-temperature wastewater pipe, and the non-condensable gas is routed through the non-condensable gas discharge pipe to the non-condensable gas fan, and the high-temperature saturated steam from the high-temperature saturated steam pipeline The high-temperature condensed water generated after the surface type drying machine is connected to the surface heat exchanger via the high-temperature condensing water pipe, and the cold water after the surface heat exchanger is connected to the cold water pipe To the hydrophobic expansion container.
- 根据权利要求1所述的一种回热法污泥热干化***，其特征是，在表面式热交换器上还设置不凝气体风机，所述干化机蒸发尾汽汽排放总管路接入至所述表面式热交换器，由所述表面式热交换器对尾汽的余热进行回收，高温饱和蒸汽经所述表面式干化机之后产生的高温凝结水接入至疏水扩容器，尾汽经表面式热交换器之后产生的不凝气体由所述不凝气体风机引出。A regenerative sludge thermal drying system according to claim 1, wherein a non-condensable gas blower is further disposed on the surface heat exchanger, and the dry steamer exhaust steam exhaust main pipeline is connected Into the surface heat exchanger, the waste heat of the tail steam is recovered by the surface heat exchanger, and the high temperature saturated steam is connected to the hydrophobic expansion container through the high temperature condensed water generated by the surface type dry machine. The non-condensable gas generated after the tail gas passes through the surface heat exchanger is taken out by the non-condensable gas fan.
- 根据权利要求1所述的一种回热法污泥热干化***，其特征是，在所述表面式热交换器与所述疏水扩容器之间还设置冷结水管，在表面式热交换器的前端还设置初级表面式热交换器，初级表面式热交换器还设置低温废水管，在初级表面热交换器上还设置不凝气体风机，高温饱和蒸汽经所述表面式干化机之后产生的高温凝结水接入到所述表面式热交换器，经所述表面式热交换器之后的冷结水接入至疏水扩容器；所述干化机蒸发尾汽排放总管路接入至所述初级表面式热交换器，尾汽经初级表面式热交换器之后的低温废水由所述低温废水管排出、而不凝气体由所述不凝气体风机引出。 A regenerative sludge thermal drying system according to claim 1, wherein a cold water pipe is disposed between the surface heat exchanger and the hydrophobic expansion vessel, and surface heat exchange is performed. The front end of the device is also provided with a primary surface heat exchanger, the primary surface heat exchanger is also provided with a low temperature waste water pipe, and a non-condensable gas fan is disposed on the primary surface heat exchanger, after the high temperature saturated steam passes through the surface type dry machine The generated high-temperature condensed water is connected to the surface heat exchanger, and the cold water after the surface heat exchanger is connected to the hydrophobic expansion vessel; the drying machine evaporates the tail gas discharge main pipeline to be connected to In the primary surface heat exchanger, the low temperature wastewater after the tail gas passes through the primary surface heat exchanger is discharged from the low temperature waste water pipe, and the non-condensable gas is taken out by the non-condensable gas fan.
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