CN113105094A - High-temperature sludge wall breaking conditioning machine, wall breaking conditioning and dewatering system and method - Google Patents
High-temperature sludge wall breaking conditioning machine, wall breaking conditioning and dewatering system and method Download PDFInfo
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- CN113105094A CN113105094A CN202110274844.5A CN202110274844A CN113105094A CN 113105094 A CN113105094 A CN 113105094A CN 202110274844 A CN202110274844 A CN 202110274844A CN 113105094 A CN113105094 A CN 113105094A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—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
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of sludge treatment, in particular to a high-temperature sludge wall breaking conditioning machine, a wall breaking conditioning dehydration system and a method, which comprise the following steps: s1, preheating sludge with water content of 80%; s2, further heating the preheated sludge, and breaking cell walls of a large number of cells in the sludge to release water in the cells under the action of high temperature and high pressure for a period of time; s3, cooling the sludge subjected to wall breaking to a temperature close to the entering temperature; s4, adding a flocculating agent into the cooled sludge, pumping the sludge into a plate-and-frame dehydrator after reaction conditioning, and squeezing and dehydrating the sludge in the plate-and-frame dehydrator until the water content is 50-60%. The invention is particularly suitable for the centralized treatment project of the sludge with the water content of about 80 percent, and solves the problem that the sludge with the water content of about 80 percent needs to be further diluted to the water content of 90 percent and then enters a plate frame machine for dehydration.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a high-temperature sludge wall breaking conditioning machine, a wall breaking conditioning and dewatering system and a wall breaking conditioning and dewatering method.
Background
With the progress of society, the environmental protection is in depth. The sewage treatment amount is increasing, the sludge amount generated in the sewage treatment process is also increasing, and the sludge amount generated in the current sewage treatment every year can reach more than 5000 million tons. The most important link in the sludge treatment is reduction, the link occupies the largest investment proportion and has the highest operation cost. At present, the sludge is dewatered to 70-80% of water content by mechanical equipment such as a centrifuge, a plate frame machine and the like, then the sludge enters a heat drying device, and the water content is reduced to about 30%, so that the volume is 60-70% less than that of the sludge subjected to mechanical dewatering. However, the operation cost of the conventional reduction mode is high, mainly because the water content of mud cakes of the dehydrator is high, and the water amount removed by subsequent further heat drying is large. Particularly, for a project of drying sludge collected in a plurality of sewage plants, a large amount of sludge with water content of about 80% needs to be directly treated, and the subsequent drying cost is too high. And through the dehydration of common board pressure hydroextractor to mud, the moisture content of mud is not enough, still need add water to dilute mud again, has increased the processing degree of difficulty.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an energy-saving high-temperature wall breaking device for breaking the wall of cells in sludge and releasing intracellular water in the sludge so as to better dehydrate and dry the sludge.
In order to achieve the above object, in a first aspect of the present invention, a method for breaking wall of sludge at high temperature, conditioning and dewatering is designed, comprising the following steps:
s1, pumping sludge with the water content of 70-80% into a preheating chamber of a sludge high-temperature wall breaking conditioning machine through a sludge feeding pump, and preheating the sludge;
s2, the preheated sludge continues to advance to enter a hydrolysis wall breaking chamber of the sludge high-temperature wall breaking conditioning machine, the sludge is further heated, and after a period of high-temperature and high-pressure action, cell walls of a large number of cells in the sludge are broken to release water in the cells;
s3, further enabling the sludge subjected to wall breaking to enter a working medium heat exchange chamber, exchanging heat with a preheating chamber, and cooling the sludge to a temperature close to the entering temperature;
and S4, feeding the cooled sludge into a conditioning tank, adding a flocculating agent, pumping the sludge into a plate-and-frame dehydrator through a high-pressure sludge pump after reaction conditioning, and squeezing and dehydrating the sludge in the plate-and-frame dehydrator until the water content is 50-60%.
Further, in the step S2, the method includes the following steps:
s2.1, continuously heating the sludge in the hydrolysis wall-breaking chamber to 120 ℃ or above by hot water or hot air;
s2.2, pumping hot water, hot oil or hot air which releases heat to the hydrolysis wall-breaking chamber into a refrigerant condenser to be heated, and then, heating the sludge in the hydrolysis wall-breaking chamber;
and S2.3, decompressing the refrigerant subjected to heat release in the refrigerant condenser through an expansion valve, then allowing the refrigerant to enter the refrigerant evaporator to absorb heat, compressing the refrigerant subjected to heat absorption through a compressor, and then allowing the refrigerant to enter the refrigerant condenser again to heat hot water, hot oil or hot air.
The invention provides a high-temperature sludge wall breaking conditioning machine, which comprises a high-temperature sludge wall breaking machine and a sludge conditioning tank which are connected with each other, wherein the high-temperature sludge wall breaking machine is of a double-layer or multilayer structure and comprises a preheating chamber and a working medium heat exchange chamber which are arranged on two adjacent layers, the hydrolysis wall breaking chamber is respectively connected with the preheating chamber and the working medium heat exchange chamber, a heating device is arranged in the hydrolysis wall breaking chamber and is used for heating and wall breaking of sludge in the hydrolysis wall breaking chamber, the working medium heat exchange chamber and the preheating chamber are correspondingly arranged for carrying out heat exchange with each other, and the sludge in the preheating chamber is preheated by the high-temperature sludge after wall breaking is heated.
Further, the heating device is an external heating device or a heating chamber for containing hot water, hot oil and hot air.
Further, the heating bin is connected with a circulating heat pump.
Furthermore, the circulating heat pump comprises a refrigerant condenser, an expansion valve, a refrigerant evaporator and a compressor which are connected in sequence, and hot water, hot air or hot oil after heat is released from the heating bin is pumped into the refrigerant condenser to be heated by the circulating heat pump, and then the hot water, the hot oil or the hot air is injected into the heating bin again.
The invention also comprises a sludge high-temperature wall breaking conditioning and dehydrating system which comprises the sludge high-temperature wall breaking conditioning and dehydrating system, wherein a sludge conditioning tank of the sludge high-temperature wall breaking conditioning machine is connected with a plate-and-frame dehydrator, and the sludge subjected to wall breaking conditioning is pressed into a mud cake with the water content of 50-60%.
Further, the system also comprises a centrifugal dehydrator or a belt dehydrator connected with the high-temperature sludge wall breaking conditioning machine and used for providing sludge with the water content of 70-80% for the high-temperature sludge wall breaking machine.
Advantageous effects of the invention
The high-temperature sludge wall breaking conditioning machine provided by the invention has the advantages that:
1. the water content of the sludge with the water content of about 80 percent can be further reduced to 50-60 percent through the plate-and-frame dehydrator, the plate-and-frame dehydrator is mechanically dehydrated, the reduction cost is about 1/5 of the heat drying cost, and even if the cost of heating, wall breaking and hydrolysis of the sludge is considered, the reduction cost is about 1/3 of the heat drying cost.
2. The sludge treatment device is particularly suitable for the centralized treatment and disposal project of sludge with water content of about 70-80%, and solves the problem that the sludge with water content of about 80% needs to be further diluted to water content of 90% and then enters a plate frame machine for dehydration.
3. For the existing mechanical dewatering equipment, the invention can be combined, the invention is added behind the traditional centrifuge and the belt type dewatering equipment to dewater the water content of the sludge to 50-60%,
4. the invention has simple process flow, adopts the heat energy recovery technology for the sludge high-temperature wall breaking conditioning machine, has particularly low operation cost, improves the adjustability and the dehydration property of the sludge,
5. the high-temperature wall breaking, conditioning and dehydrating system for sludge, disclosed by the invention, has no transmission part, is stable and reliable, and is low in material cost.
Drawings
FIG. 1 is a schematic structural diagram of a high-temperature wall breaking, conditioning and dewatering system for sludge according to the present invention;
in the figure: 1. the system comprises a wet sludge bin 2, a sludge feeding pump 3, a high-temperature sludge wall breaking machine 4, a circulating heat pump 5, a sludge conditioning tank 6, a high-pressure sludge feeding pump 7, a plate and frame dehydrator 31, a preheating chamber 32, a working medium heat exchange chamber 33, a hydrolysis wall breaking chamber 34, a heating bin 41, a refrigerant condenser 42, a compressor 43, a refrigerant evaporator 44, an expansion valve 71, a compression oil cylinder 72, a hollow filter plate 73 and a metal heat transfer surface.
Detailed Description
The construction and principles of such a device will be apparent to those skilled in the art from the following further description of the invention taken in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The invention comprises three aspects, firstly, a first aspect comprises a sludge high-temperature wall breaking conditioning machine, the sludge high-temperature wall breaking conditioning machine, referring to figure 1, comprises a high-temperature sludge wall breaking machine and a sludge conditioning tank which are connected with each other, in this embodiment, referring to fig. 1, the high temperature sludge wall breaking machine has a three-layer structure, the middle layer includes a preheating chamber, the preheating chambers are provided with working medium heat exchange chambers at corresponding positions of two adjacent layers, the hydrolysis wall breaking chamber is respectively connected with the preheating chamber of the middle layer and the working medium heat exchange chambers of the two adjacent layers, a heating device is arranged in the hydrolysis wall-breaking chamber and is used for heating and breaking the wall of the sludge in the hydrolysis wall-breaking chamber, because the working medium heat exchange chamber and the preheating chamber are arranged correspondingly, the working medium heat exchange chamber and the preheating chamber exchange heat mutually, and preheating the sludge in the preheating chamber by the high-temperature sludge entering the working medium heat exchange chamber after wall breaking by heating.
The heating device in the hydrolysis wall-breaking chamber needs to heat the sludge in the chamber to 120 ℃, so the heating device can be a stable and cheap heat source for saving cost, and can also be a heating chamber connected with a circulating heat pump or a circulating heat pump, and the heating chamber is used for containing hot water, hot gas or hot oil provided by the circulating heat pump.
The circulating heat pump comprises a refrigerant condenser, an expansion valve, a refrigerant evaporator and a compressor which are sequentially connected, hot water, hot air or hot oil which is used for heating the hydrolysis wall breaking chamber in the heating bin enters the refrigerant condenser of the circulating heat pump after releasing heat, the hot water, the hot air or the hot oil which releases heat exchanges with the refrigerant in the refrigerant condenser, the hot water, the hot air or the hot oil which exchanges heat enters the heating bin again to heat the partition wall, the refrigerant which exchanges heat enters the refrigerant evaporator to absorb heat after being decompressed by the expansion valve, and the refrigerant which absorbs heat enters the refrigerant condenser again after being compressed by the compressor to heat the hot water, the hot air or the hot oil which releases heat.
The working medium heat exchange chamber is connected with a sludge conditioning tank, the water content of the sludge releasing intracellular water through wall breaking in the sludge conditioning tank reaches about 90%, the conditioning and dosing conditions are achieved, and then flocculating agents such as PAM (polyacrylamide) are added for conditioning.
Example 2
In embodiment 2 of the present invention, a high temperature sludge wall breaking conditioning and dewatering system for sludge is provided, which includes the high temperature sludge wall breaking conditioning machine of embodiment 1, the high temperature sludge wall breaking conditioning machine of the high temperature sludge wall breaking conditioning machine is connected to a wet sludge bin, the wet sludge bin contains a large amount of sludge with a water content of about 80%, the sludge may be preliminarily dewatered by an existing belt dewaterer or centrifugal dewaterer, the sludge conditioning tank is connected to a plate frame dewaterer, and the sludge with a water content of about 90% after wall breaking conditioning is further dewatered to 50% -60% in the plate frame dewaterer. Compared with the drying cost required for directly drying the sludge with the water content of about 80% to the water content of 50-60%, the technical scheme adopted by the embodiment adopts a mechanical dehydration method, and the cost is about 1/5 of the cost of hydrolysis required by heating and wall breaking, so that the required cost is greatly reduced. Meanwhile, the sludge does not need to be treated by adding water.
Example 3
Embodiment 3 a method for performing high-temperature wall breaking, conditioning and dewatering on sludge by using the high-temperature wall breaking, conditioning and dewatering system for sludge provided in embodiment 2 includes the following steps:
s1, pumping sludge with the water content of 80% into a preheating chamber of a sludge high-temperature wall breaking conditioning machine through a sludge feeding pump, and preheating the sludge;
s2, the preheated sludge continues to advance to enter a hydrolysis wall breaking chamber of the sludge high-temperature wall breaking conditioning machine, the sludge is further heated, and after a period of high-temperature and high-pressure action, cell walls of a large number of cells in the sludge are broken to release water in the cells;
s3, further enabling the sludge subjected to wall breaking to enter a working medium heat exchange chamber, exchanging heat with a preheating chamber, and cooling the sludge to a temperature close to the entering temperature;
and S4, feeding the cooled sludge into a conditioning tank, adding a flocculating agent, pumping the sludge into a plate-and-frame dehydrator through a high-pressure sludge pump after reaction conditioning, and squeezing and dehydrating the sludge in the plate-and-frame dehydrator until the water content is 50-60%.
In the step S2, the method includes the steps of:
s2.1, continuously heating the sludge in the hydrolysis wall-breaking chamber to 120 ℃ or higher by hot water or hot air;
s2.2, pumping hot water or hot air after releasing heat to the hydrolysis wall-breaking chamber into a refrigerant condenser to be heated, and then entering the hydrolysis wall-breaking chamber again to heat sludge;
and S2.3, decompressing the refrigerant subjected to heat release in the refrigerant condenser through an expansion valve, then enabling the refrigerant to enter the refrigerant evaporator to absorb heat, compressing the refrigerant subjected to heat absorption through a compressor, and then enabling the refrigerant to enter the refrigerant condenser again to heat hot water or hot air.
The method provided by the invention can be used for reducing the sludge at low cost so as to treat the sludge on a large scale.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be within the technical scope of the present invention, and the technical solutions and novel concepts according to the present invention should be covered by the scope of the present invention.
Claims (8)
1. A high-temperature wall breaking, conditioning and dehydrating method for sludge is characterized by comprising the following steps:
s1, pumping sludge with the water content of 70-80% into a preheating chamber of a sludge high-temperature wall breaking conditioning machine through a sludge feeding pump, and preheating the sludge;
s2, the preheated sludge continues to advance to enter a hydrolysis wall breaking chamber of the sludge high-temperature wall breaking conditioning machine, the sludge is further heated, and after a period of high-temperature and high-pressure action, cell walls of a large number of cells in the sludge are broken to release water in the cells;
s3, further enabling the sludge subjected to wall breaking to enter a working medium heat exchange chamber, exchanging heat with a preheating chamber, and cooling the sludge to a temperature close to the entering temperature;
and S4, feeding the cooled sludge into a conditioning tank, adding a flocculating agent, pumping the sludge into a plate-and-frame dehydrator through a high-pressure sludge pump after reaction conditioning, and squeezing and dehydrating the sludge in the plate-and-frame dehydrator until the water content is 50-60%.
2. The method for high-temperature wall-breaking conditioning and dewatering of sludge as claimed in claim 1, wherein in the step S2, the method comprises the following steps:
s2.1, continuously heating the sludge in the hydrolysis wall-breaking chamber to 120 ℃ or above by hot water or hot air;
s2.2, pumping hot water or hot air after releasing heat to the hydrolysis wall-breaking chamber into a refrigerant condenser to be heated, and then entering the hydrolysis wall-breaking chamber again to heat sludge;
and S2.3, decompressing the refrigerant subjected to heat release in the refrigerant condenser through an expansion valve, then enabling the refrigerant to enter the refrigerant evaporator to absorb heat, compressing the refrigerant subjected to heat absorption through a compressor, and then enabling the refrigerant to enter the refrigerant condenser again to heat hot water or hot air.
3. The utility model provides a machine is taked care of to mud high temperature broken wall, a serial communication port, including interconnect's high temperature mud broken wall machine and mud recuperation groove, high temperature mud broken wall machine is double-deck or multilayer structure, including locating adjacent two-layer preheating chamber and working medium heat transfer cavity, the broken wall cavity of hydrolysising connects respectively preheating chamber and working medium heat transfer cavity, be equipped with heating device in the broken wall cavity of hydrolysising for to the mud heating broken wall in the broken wall cavity of hydrolysising, working medium heat transfer cavity corresponds with preheating chamber and sets up and carries out the heat exchange mutually, and the high temperature mud after the broken wall of heating preheats the mud in the preheating chamber.
4. The machine for breaking the wall of the sludge at the high temperature according to claim 3, wherein the heating device is an external heating device or a heating chamber for containing hot water, hot oil or hot air.
5. The machine for breaking the wall of sludge at high temperature according to claim 4, wherein the heating chamber is connected with a circulating hot water pump or a circulating hot air pump.
6. The sludge high-temperature wall breaking conditioning machine as claimed in claim 5, wherein the circulating heat pump comprises a refrigerant condenser, an expansion valve, a refrigerant evaporator and a compressor which are connected in sequence, hot water, hot oil or hot air after heat release in the heating bin is pumped into the refrigerant condenser to be heated, and then the hot water, the hot oil or the hot air is injected into the heating bin again.
7. A high-temperature sludge wall breaking conditioning and dewatering system comprises the high-temperature sludge wall breaking conditioning machine as claimed in any one of claims 3 to 6, and is characterized in that a sludge conditioning tank of the high-temperature sludge wall breaking conditioning machine is connected with a plate-and-frame dehydrator, and sludge subjected to wall breaking conditioning is pressed into a mud cake with water content of 50% -60%.
8. The system for breaking wall and conditioning and dewatering of sludge at high temperature according to claim 7, further comprising a centrifugal dehydrator or a belt dehydrator connected to the machine for breaking wall and conditioning sludge at high temperature for providing sludge with water content of 70% to 80% to the machine for breaking wall and conditioning sludge at high temperature.
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| CN114349303A (en) * | 2021-12-31 | 2022-04-15 | 同济大学 | Efficient sludge dewatering treatment process based on low-temperature hydrothermal treatment |
| CN115849667A (en) * | 2022-12-21 | 2023-03-28 | 上海仁创环境科技有限公司 | Sludge treatment system and treatment method |
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| CN115849667A (en) * | 2022-12-21 | 2023-03-28 | 上海仁创环境科技有限公司 | Sludge treatment system and treatment method |
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