WO2012139431A1 - Treatment process for making sludge harmless through self-sustaining balanced incineration - Google Patents
Treatment process for making sludge harmless through self-sustaining balanced incineration Download PDFInfo
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- WO2012139431A1 WO2012139431A1 PCT/CN2012/070725 CN2012070725W WO2012139431A1 WO 2012139431 A1 WO2012139431 A1 WO 2012139431A1 CN 2012070725 W CN2012070725 W CN 2012070725W WO 2012139431 A1 WO2012139431 A1 WO 2012139431A1
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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
Definitions
- the invention relates to a sludge treatment process, in particular to a sludge self-sustaining balance incineration harmless treatment process.
- the “horizontal spiral centrifugal dewatering machine” is the most advanced sludge concentration and dewatering equipment in the world, but the water content of the final sludge after concentration and dewatering in actual operation is still about 82%. It is precisely because the sludge after concentrated dewatering still contains relatively high moisture, which brings great difficulties to subsequent sludge disposal.
- there are still no innovative treatment and disposal processes in the world mainly focusing on the direct use of fluidized bed incineration technology.
- the vulcanized bed incineration technology is advanced and small in size, it faces the problem of high energy consumption and cannot manage the sludge by self-sustaining balance. Therefore, how to reduce the moisture content of sludge to below 70%, bringing revolutionary changes to the subsequent sludge treatment and disposal is an urgent problem to be solved.
- the invention aims at the insufficiency of the self-sustained balanced incineration treatment sludge in the prior art, and provides a harmless treatment process for the sludge self-sustaining balance incineration.
- the sludge self-sustaining balance incineration treatment process, the sludge self-sustaining balance incineration treatment process provided by the invention, the equipment for completing the process includes a sludge transfer pump and a filter press.
- Sludge transfer pump is used to pump sludge with water content of 80%-98%, pumped into the filter press for dehydration, and the water content in the sludge is reduced to below 70%.
- the filter press is connected to the fluidized bed dryer; the sludge having a water content of 70% or less is sent to a fluidized bed dryer for drying treatment, and the sludge moisture content is dried to 35% or less.
- the fluidized bed dryer is connected to the incinerator; the sludge ingot having a water content of 35% or less is crushed and sent to an incinerator having a temperature of 850 ° C or higher, and is burned, and the heat generated in the combustion is transferred to the
- the fluidized bed dryer is used for sludge drying treatment, so that the sludge can be self-sustained and incinerated in the incinerator to realize the harmless treatment of the sludge.
- the sludge transfer pump is a screw type sludge transfer pump or a plunger type sludge transfer pump.
- the sludge transfer pump continuously delivers the sludge to the filter press. Compared with other conveying mechanisms, it has low energy consumption, low noise and small floor space.
- the incinerator is a circulating fluidized bed incinerator or a bubbling fluidized bed incinerator.
- the sludge is directly pumped into the filter press by pressure from a sludge transfer pump for dehydration.
- a gas circulation system is arranged between the incinerator and the fluidized bed dryer, and the heat of the smoke generated by the incinerator is collected, and is applied to the fluidized bed dryer through the gas circulation system, and the moisture content is less than 70%.
- the sludge is dried.
- a circulation oil circuit system is arranged between the incinerator and the fluidized bed dryer, and the heat generated by the incinerator heats the heat transfer oil, and the heat transfer oil is pumped to the oil circuit system in the fluidized bed dryer for The sludge having a water content of 70% or less is dried.
- the sludge having a water content of less than 70% is sent to a fluidized bed dryer for drying treatment, and the moisture content of the sludge is dried to less than 35%, and the water content is less than 35%.
- the sludge is crushed, it is sent to an incinerator whose temperature has reached 850 °C or higher, and is burned.
- the heat generated after combustion is transferred to a fluidized bed dryer for sludge drying treatment, so that the sludge is in the incinerator. It is able to self-sustain and balance incineration, and truly achieve low-energy treatment of sludge, which will be a measure of both economic and social benefits.
- FIG. 1 is a schematic diagram of the overall process of the present invention.
- the apparatus of the present invention consists of four mature independent system mechanisms: a sludge transfer pump, a filter press, a fluidized bed dryer, and an incinerator.
- the sludge transfer pump is connected with the filter press interface.
- the sludge transfer pump pumps the sludge with a water content of 80%-98% to the filter press for press dewatering, so that the water content in the sludge is reduced to 70.
- the sludge is removed from the filter press, transported to a fluidized bed dryer, and the heat generated by the incinerator is dried to dry the sludge moisture content to less than 35%, and then The sludge with a water content of less than 35% is crushed and sent to an incinerator whose temperature has reached 850 ° C for combustion, and at the same time, the heat and heat generated in the combustion are transferred to the fluidized bed dryer for the sewage.
- the mud is dried and treated, so that the sludge can be self-sustained and balanced in the incinerator, so that the sludge can be treated harmlessly, and the grand goal of energy saving and emission reduction can be realized.
- the heat generated after combustion is transferred to the fluidized bed dryer for sludge drying treatment.
Abstract
A treatment process for making sludge harmless through self-sustaining balanced incineration is provided. The process uses a sludge transfer pump to pump sludge with a water content of 80-98% into a filter press for dehydrating to reduce the water content of the sludge to below 70%, transfers the sludge with the water content reduced to below 70% to a fluidized bed dryer for drying to bring the water content of the sludge below 35%, crushes the sludge with water content below 35% and transfers the crushed sludge into an incinerator with a temperature higher than 850°C for burning. The heat generated during burning is transferred to the fluidized bed dryer for drying the sludge, so as to enable the sludge to undergo self-sustaining balanced incineration in the incinerator, genuinely making the sludge harmless in a low energy consumption manner.
Description
本发明涉及一种污泥处理工艺，尤其涉及污泥自持平衡焚烧无害化处理工艺。 The invention relates to a sludge treatment process, in particular to a sludge self-sustaining balance incineration harmless treatment process.
随着城市污水网络服务的人口不断增加，水质排放标准的越来越严格以及城市中各大、中型污水处理厂的新建或是改扩建，污泥（污水）的产量也迅速增加。就中国而言，到2015年污泥产量将达到1700万吨/年，相当于2003年的2倍多。污泥如果不被妥善的处理与处置，将会造成严重的二次污染。因此，如何减量、高效率、科学、无害化地处理污泥已经成为世界各国共同面临的一大难题。目前，各大污水处理厂大都选用的污泥浓缩脱水设备为：卧式离心脱水机、带式压滤脱水机、板框式压滤脱水机这三种设备。其中“卧式螺旋离心脱水机”是目前世界上较为先进的污泥浓缩脱水设备，但实际运行中最终污泥浓缩脱水后的含水率仍然在82%左右。正是由于浓缩脱水后的污泥仍然含有相当高的水分，这给后续的污泥处置带来了很大的困难。目前世界各国仍然没有出现革新的处理处置工艺，主要还是集中在直接利用硫化床焚烧技术上。虽然硫化床焚烧技术先进，体积小，但是面临着高能耗的问题，无法自持平衡焚烧处理污泥。所以，如何将污泥含水率降至70%以下，为后续的污泥处理处置带来革命性的变化是急待解决的问题。
With the increasing population of urban sewage network services, increasingly strict water quality standards, and the construction or expansion of large and medium-sized sewage treatment plants in cities, the production of sludge (sewage) has also increased rapidly. As far as China is concerned, sludge production will reach 17 million tons per year by 2015, which is more than twice that of 2003. If the sludge is not properly disposed and disposed, it will cause serious secondary pollution. Therefore, how to reduce, high efficiency, scientific and harmless treatment of sludge has become a major problem faced by all countries in the world. At present, most of the sewage treatment plants selected by the major sewage treatment plants are: horizontal centrifugal dewatering machine, belt filter press dewatering machine, plate and frame filter press dewatering machine. Among them, the “horizontal spiral centrifugal dewatering machine” is the most advanced sludge concentration and dewatering equipment in the world, but the water content of the final sludge after concentration and dewatering in actual operation is still about 82%. It is precisely because the sludge after concentrated dewatering still contains relatively high moisture, which brings great difficulties to subsequent sludge disposal. At present, there are still no innovative treatment and disposal processes in the world, mainly focusing on the direct use of fluidized bed incineration technology. Although the vulcanized bed incineration technology is advanced and small in size, it faces the problem of high energy consumption and cannot manage the sludge by self-sustaining balance. Therefore, how to reduce the moisture content of sludge to below 70%, bringing revolutionary changes to the subsequent sludge treatment and disposal is an urgent problem to be solved.
本发明针对现有技术中，无法自持平衡焚烧处理污泥的不足，提供了污泥自持平衡焚烧无害化处理工艺。 The invention aims at the insufficiency of the self-sustained balanced incineration treatment sludge in the prior art, and provides a harmless treatment process for the sludge self-sustaining balance incineration.
为了解决上述技术问题，本发明通过下述技术方案得以解决：In order to solve the above technical problems, the present invention is solved by the following technical solutions:
污泥自持平衡焚烧无害化处理工艺，本发明所提供的污泥自持平衡焚烧无害化处理工艺，完成所述工艺的设备包括污泥输送泵和压滤机。采用污泥输送泵将含水率为80%—98%的污泥，泵入压滤机中进行脱水，使污泥中的含水率降至70%以下。此四个已经成熟的独立系统机构完美的构成一个完整的连续性低能耗的挤压脱水，并使污泥自持平衡焚烧无害化处理的工艺流程。由以上系统的整体连续性作业，最终实现将污泥无害化处理的目标。并为污泥后续的处理与处置带来高效率、低能耗、低污染的革命性的工艺变化。The sludge self-sustaining balance incineration treatment process, the sludge self-sustaining balance incineration treatment process provided by the invention, the equipment for completing the process includes a sludge transfer pump and a filter press. Sludge transfer pump is used to pump sludge with water content of 80%-98%, pumped into the filter press for dehydration, and the water content in the sludge is reduced to below 70%. These four mature independent system mechanisms perfectly constitute a complete continuous low-energy extrusion dewatering process and the process of sludge self-sustaining balanced incineration and harmless treatment. From the overall continuity of the above system, the goal of decontaminating sludge is finally achieved. It also brings revolutionary process changes with high efficiency, low energy consumption and low pollution for the subsequent treatment and disposal of sludge.
作为优选，压滤机与流化床干燥器连接；将含水率70%以下的污泥输送至流化床干燥器中进行干化处理，将污泥含水率干化至35%以下。Preferably, the filter press is connected to the fluidized bed dryer; the sludge having a water content of 70% or less is sent to a fluidized bed dryer for drying treatment, and the sludge moisture content is dried to 35% or less.
作为优选，流化床干燥器与焚烧炉连接；将含水率在35%以下的污泥锭破碎后送入温度已经达到850℃以上的焚烧炉中，进行燃烧，燃烧中产生的热量又转送至流化床干燥器中用于污泥干化处理，使污泥在焚烧炉中能够自持平衡焚烧，实现污泥的无害化处理。Preferably, the fluidized bed dryer is connected to the incinerator; the sludge ingot having a water content of 35% or less is crushed and sent to an incinerator having a temperature of 850 ° C or higher, and is burned, and the heat generated in the combustion is transferred to the The fluidized bed dryer is used for sludge drying treatment, so that the sludge can be self-sustained and incinerated in the incinerator to realize the harmless treatment of the sludge.
作为优选，所述的污泥输送泵为螺杆式污泥输送泵或柱塞式污泥输送泵。污泥输送泵能连续的将污泥输送至压滤机中。与其他输送机构比较，它能耗低，噪声小，占地面积小。
Preferably, the sludge transfer pump is a screw type sludge transfer pump or a plunger type sludge transfer pump. The sludge transfer pump continuously delivers the sludge to the filter press. Compared with other conveying mechanisms, it has low energy consumption, low noise and small floor space.
作为优选，所述的焚烧炉为循环流化床焚烧炉或鼓泡式流化床焚烧炉。Preferably, the incinerator is a circulating fluidized bed incinerator or a bubbling fluidized bed incinerator.
作为优选，污泥由污泥输送泵通过压力直接泵入压滤机中进行脱水。Preferably, the sludge is directly pumped into the filter press by pressure from a sludge transfer pump for dehydration.
作为优选，所述的焚烧炉和流化床干燥器之间设有气流循环系统，焚烧炉产生的烟热被收集，经过气流循环系统作用于流化床干燥器，对含水率70%以下的污泥进行干化处理。
Preferably, a gas circulation system is arranged between the incinerator and the fluidized bed dryer, and the heat of the smoke generated by the incinerator is collected, and is applied to the fluidized bed dryer through the gas circulation system, and the moisture content is less than 70%. The sludge is dried.
作为优选，所述的焚烧炉和流化床干燥器之间设有循环油路系统，由焚烧炉产生的热量加热导热油，将导热油泵送至流化床干燥器内的油路系统用于对含水率在70%以下的污泥进行干化处理。Preferably, a circulation oil circuit system is arranged between the incinerator and the fluidized bed dryer, and the heat generated by the incinerator heats the heat transfer oil, and the heat transfer oil is pumped to the oil circuit system in the fluidized bed dryer for The sludge having a water content of 70% or less is dried.
按照本发明的技术方案，含水率降至70%以下的污泥输送至流化床干燥器中进行干化处理，将污泥含水率干化至35%以下，再将含水率在35%以下的污泥破碎后送入温度已经达到850℃以上的焚烧炉中，进行燃烧，燃烧后产生的热量又转送至流化床干燥器中用于污泥干化处理，使污泥在焚烧炉中能够自持平衡焚烧，真正做到污泥低能耗处理，这将是经济与社会效益并举的措施。
According to the technical solution of the present invention, the sludge having a water content of less than 70% is sent to a fluidized bed dryer for drying treatment, and the moisture content of the sludge is dried to less than 35%, and the water content is less than 35%. After the sludge is crushed, it is sent to an incinerator whose temperature has reached 850 °C or higher, and is burned. The heat generated after combustion is transferred to a fluidized bed dryer for sludge drying treatment, so that the sludge is in the incinerator. It is able to self-sustain and balance incineration, and truly achieve low-energy treatment of sludge, which will be a measure of both economic and social benefits.
图1 为本发明整体流程示意图。 FIG. 1 is a schematic diagram of the overall process of the present invention.
下面结合附图与具体实施方式对本发明作进一步详细描述。The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
参见附图1，本发明工艺的设备由污泥输送泵、压滤机、流化床干燥器和焚烧炉四个成熟独立的系统机构组成。污泥输送泵与压滤机接口相连接，污泥输送泵将含水率为80%—98%的污泥泵送至压滤机中进行压榨脱水处理，使得污泥中的含水率降至70%以下，将污泥从压滤机中脱下，输送至流化床干燥器中，由焚烧炉产生的热量对其进行干化处理，将污泥含水率干化至35%以下，再将含水率在35%以下的污泥破碎后送入温度已经达到850℃的焚烧炉中，进行燃烧，与此同时又将燃烧中产生的热量与烟热转送至流化床干燥器中用于污泥干化处理，让污泥在焚烧炉中能够自持平衡焚烧，使污泥无害化处理，真正实现节能减排的宏伟目标。燃烧后产生的热量又转送至流化床干燥器中用于污泥干化处理，同时存在两种方式：一是，焚烧炉和流化床干燥器之间设有气流循环系统，焚烧炉产生的烟热被收集，经过气流循环系统作用于流化床干燥器，对含水率70%以下的污泥进行干化处理；二是焚烧炉和流化床干燥器之间设有循环油路系统，由焚烧炉产生的热量加热导热油，将导热油泵送至流化床干燥器内的油路系统用于对含水率在70%以下的污泥进行干化处理。Referring to Figure 1, the apparatus of the present invention consists of four mature independent system mechanisms: a sludge transfer pump, a filter press, a fluidized bed dryer, and an incinerator. The sludge transfer pump is connected with the filter press interface. The sludge transfer pump pumps the sludge with a water content of 80%-98% to the filter press for press dewatering, so that the water content in the sludge is reduced to 70. Below %, the sludge is removed from the filter press, transported to a fluidized bed dryer, and the heat generated by the incinerator is dried to dry the sludge moisture content to less than 35%, and then The sludge with a water content of less than 35% is crushed and sent to an incinerator whose temperature has reached 850 ° C for combustion, and at the same time, the heat and heat generated in the combustion are transferred to the fluidized bed dryer for the sewage. The mud is dried and treated, so that the sludge can be self-sustained and balanced in the incinerator, so that the sludge can be treated harmlessly, and the grand goal of energy saving and emission reduction can be realized. The heat generated after combustion is transferred to the fluidized bed dryer for sludge drying treatment. There are two ways: First, there is a circulation system between the incinerator and the fluidized bed dryer, and the incinerator produces The heat of the smoke is collected, and the sludge is applied to the fluidized bed dryer through the air circulation system to dry the sludge with a water content of 70% or less. Second, the circulating oil system is provided between the incinerator and the fluidized bed dryer. The heat generated by the incinerator heats the heat transfer oil, and the heat transfer oil is pumped to the oil circuit system in the fluidized bed dryer for drying the sludge having a water content of 70% or less.
总之，以上所述仅为本发明的较佳实施例，凡依本发明申请专利范围所作的均等变化与修饰，皆应属本发明专利的涵盖范围。
In summary, the above description is only the preferred embodiment of the present invention, and all changes and modifications made by the scope of the present invention should be covered by the present invention.
Claims (8)
- 污泥自持平衡焚烧无害化处理工艺，其特征在于：完成所述工艺的设备包括污泥输送泵和压滤机；采用污泥输送泵将含水率为80%—98%的污泥，泵入压滤机中进行脱水，使污泥中的含水率降至70%以下。 The sludge self-sustaining balance incineration treatment process is characterized in that: the equipment for completing the process comprises a sludge transfer pump and a filter press; the sludge transfer pump is used to set the sludge with a water content of 80%-98%, the pump Dewatering is carried out in a filter press to reduce the water content in the sludge to less than 70%.
- 根据权利要求1所述的污泥自持平衡焚烧无害化处理工艺，其特征在于：压滤机与流化床干燥器连接；将含水率70%以下的污泥输送至流化床干燥器中进行干化处理，将污泥含水率干化至35%以下。The sludge self-sustaining balance incineration treatment process according to claim 1, characterized in that: the filter press is connected with the fluidized bed dryer; and the sludge having a water content of 70% or less is sent to the fluidized bed dryer. The drying treatment is carried out to dry the sludge moisture content to 35% or less.
- 根据权利要求2所述的污泥自持平衡焚烧无害化处理工艺，其特征在于：流化床干燥器与焚烧炉连接；将含水率在35%以下的污泥锭破碎后送入温度已经达到850℃以上的焚烧炉中，进行燃烧，燃烧中产生的热量又将转送至流化床干燥器中用于污泥干化处理，使污泥在焚烧炉中能够自持平衡焚烧。The sludge self-sustaining balance incineration treatment process according to claim 2, characterized in that the fluidized bed dryer is connected with the incinerator; the sludge ingot having a water content of less than 35% is crushed and the temperature is reached. In an incinerator of 850 ° C or higher, combustion is carried out, and the heat generated in the combustion is transferred to a fluidized bed dryer for sludge drying treatment, so that the sludge can be self-sustained and incinerated in the incinerator.
- 根据权利要求1所述的污泥自持平衡焚烧无害化处理工艺，其特征在于：所述的污泥输送泵为螺杆式污泥输送泵或柱塞式污泥输送泵。The sludge self-sustaining balance incineration harmless treatment process according to claim 1, wherein the sludge transfer pump is a screw type sludge transfer pump or a plunger type sludge transfer pump.
- 根据权利要求3所述的污泥自持平衡焚烧无害化处理工艺，其特征在于：所述的焚烧炉为循环流化床焚烧炉或鼓泡式流化床焚烧炉。The sludge self-sustaining balance incineration treatment process according to claim 3, wherein the incinerator is a circulating fluidized bed incinerator or a bubbling fluidized bed incinerator.
- 根据权利要求1所述的污泥自持平衡焚烧无害化处理工艺，其特征在于：污泥由污泥输送泵通过压力直接泵入压滤机中进行脱水。The sludge self-sustaining balance incineration harmless treatment process according to claim 1, wherein the sludge is directly pumped into the filter press by a sludge transfer pump for dehydration.
- 根据权利要求3所述的污泥自持平衡焚烧无害化处理工艺，其特征在于：所述的焚烧炉和流化床干燥器之间设有气流循环系统，焚烧炉产生的烟热被收集，经过气流循环系统作用于流化床干燥器，对含水率70%以下的污泥进行干化处理。The sludge self-sustaining balance incineration treatment process according to claim 3, characterized in that: the incinerator and the fluidized bed dryer are provided with a gas circulation system, and the smoke heat generated by the incinerator is collected. The sludge is dried in a fluidized bed dryer through a gas circulation system to dry the sludge having a water content of 70% or less.
- 根据权利要求3所述的污泥自持平衡焚烧无害化处理工艺，其特征在于：所述的焚烧炉和流化床干燥器之间设有循环油路系统，由焚烧炉产生的热量加热导热油，将导热油泵送至流化床干燥器内的油路系统用于对含水率在70%以下的污泥进行干化处理。The sludge self-sustaining balance incineration treatment process according to claim 3, characterized in that: the incinerator and the fluidized bed dryer are provided with a circulating oil circuit system, and the heat generated by the incinerator heats the heat conduction. The oil is pumped to the oil circuit system in the fluidized bed dryer for drying the sludge having a water content of 70% or less.
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| CN102219345A (en) * | 2011-04-13 | 2011-10-19 | 徐继开 | Unharmful self-sustained sludge disposal and incinerating technique |
| CN103708691B (en) * | 2013-12-25 | 2015-07-29 | 华纺股份有限公司 | The technique that printing and dyeing sludge is close-coupled processing |
| CN105240859A (en) * | 2015-10-30 | 2016-01-13 | 大连科林能源工程技术开发有限公司 | Energy-self-supplying type chemical engineering sludge drying and burning system |
| CN109928595B (en) * | 2019-03-28 | 2021-02-02 | 北京科技大学 | Sludge deep drying method and system based on low-temperature heat source |
| CN112128778A (en) * | 2020-08-14 | 2020-12-25 | 安吉临港热电有限公司 | Dust-free sludge incineration device and incineration process thereof |
| CN112250275B (en) * | 2020-09-27 | 2024-03-26 | 浙江华川实业集团有限公司 | Sludge treatment method for papermaking sewage |
| CN113429105A (en) * | 2021-05-31 | 2021-09-24 | 广州市土木金建筑工程有限公司 | Sludge constant-temperature drying harmless treatment method |
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