CN111268882A - Sludge dry-wet differentiation treatment system and method - Google Patents
Sludge dry-wet differentiation treatment system and method Download PDFInfo
- Publication number
- CN111268882A CN111268882A CN202010238299.XA CN202010238299A CN111268882A CN 111268882 A CN111268882 A CN 111268882A CN 202010238299 A CN202010238299 A CN 202010238299A CN 111268882 A CN111268882 A CN 111268882A
- Authority
- CN
- China
- Prior art keywords
- sludge
- communicated
- outlet
- dry
- inlet
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sludge dry-wet differentiation treatment system and method, wherein the outlet of a low-temperature pressurized thermal hydrolysis device is communicated with the inlet of a mechanical dehydration device, the dry sludge outlet of the mechanical dehydration device is communicated with a sludge treatment system, the filtrate outlet of the mechanical dehydration device is communicated with the inlet of a filtrate water tank, the outlet of the filtrate water tank is divided into two paths by a water pump, one path is communicated with the low-temperature pressurized thermal hydrolysis device through the filtrate recycling valve, the other path is communicated with the inlet of the atomization spraying valve group, the inlet of each atomization nozzle is communicated with the outlet of the atomization spraying valve group, the outlet of each atomization nozzle is communicated with the furnace chamber of the boiler, the system and the method can realize the dry-wet differentiation treatment of the sludge after the sludge is subjected to pyrohydrolysis, solve the problems of high water content and low heat value of the sludge after the sludge is subjected to pyrohydrolysis, and realize the efficient utilization of COD (chemical oxygen demand) products after the sludge is subjected to pyrohydrolysis.
Description
Technical Field
The invention belongs to the technical field of sludge treatment, and relates to a sludge dry-wet differentiation treatment system and method.
Background
Along with the development demand of the country, the discharge of urban sewage and industrial sewage in the country is increased continuously, so that the total amount of sludge in the country is in a rising trend, and the sludge treatment situation is very severe. Meanwhile, with the increasing emphasis of the country on environmental protection, the sludge treatment requirements are reduced, stabilized, harmless and recycled. The traditional sludge treatment means and method are gradually abandoned, so how to treat sludge cleanly, efficiently and reasonably becomes a problem to be solved urgently.
The traditional sludge treatment mode comprises technologies of landfill, composting, land utilization, incineration and the like. For landfill and land utilization technologies, secondary pollution is easily caused due to the fact that sludge contains harmful substances such as heavy metals; for the landfill technology, firstly, the sludge is not recycled and the land is wasted, and simultaneously, the underground water pollution is easily caused; compared with the landfill and composting treatment of sludge, the incineration method has the advantages of volume reduction, high weight reduction rate, high treatment speed, thorough harmlessness, energy recycling and the like, but the sludge pyrohydrolysis process can generate products such as COD (chemical oxygen demand) and the like, the biological method has high treatment difficulty and causes pollution to the environment, and simultaneously, the mud generated by the sludge pyrohydrolysis has high water content and is unstable in direct incineration and combustion. Therefore, the sludge is subjected to dry-wet differentiation treatment, the problems of high water content and low heat value of the sludge after thermal hydrolysis can be solved, and the efficient utilization of COD (chemical oxygen demand) products after thermal hydrolysis of the sludge is realized.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a sludge dry-wet differentiation treatment system and a sludge dry-wet differentiation treatment method, which can realize the dry-wet differentiation treatment of sludge subjected to thermal hydrolysis, solve the problems of high water content and low heat value of the sludge subjected to thermal hydrolysis and realize the efficient utilization of COD (chemical oxygen demand) products subjected to thermal hydrolysis of the sludge.
In order to achieve the aim, the sludge dry-wet differentiation treatment system comprises a low-temperature pressurized thermal hydrolysis device, a mechanical dehydration device, a filtrate pressing water tank, a filtrate pressing recycling valve, an atomization spraying valve group, a boiler and a plurality of atomization nozzles;
the outlet of the low-temperature pressurized thermal hydrolysis device is communicated with the inlet of the mechanical dehydration device, the dry sludge outlet of the mechanical dehydration device is communicated with the sludge treatment system, the filtrate outlet of the mechanical dehydration device is communicated with the inlet of the filtrate tank, the outlet of the filtrate tank is divided into two paths by a water pump, one path is communicated with the low-temperature pressurized thermal hydrolysis device through a filtrate recycling valve, the other path is communicated with the inlet of the atomization spraying valve group, the inlet of each atomization nozzle is communicated with the outlet of the atomization spraying valve group, and the outlet of each atomization nozzle is communicated with the hearth of the boiler.
The atomizing spraying valve group comprises a plurality of spraying branch circuits, wherein one spraying branch circuit corresponds to one atomizing nozzle, the inlet of each spraying branch circuit is communicated with the water pump, and the outlet of each spraying branch circuit is communicated with the inlet of the corresponding atomizing nozzle.
The number of the spraying branches is 2-8.
The outlet of each atomizing nozzle is positioned in a furnace reburning area of the boiler.
The sludge dry-wet differentiation treatment method comprises the following steps:
the sludge enters a low-temperature pressurized thermal hydrolysis device, is changed into a slurry state under the action of pressurized thermal hydrolysis and then is input into a mechanical dehydration device, the sludge slurry is mechanically dehydrated in the mechanical dehydration device, the dehydrated dry sludge enters a sludge treatment system for treatment, the pressure filtrate output by the mechanical dehydration device enters a pressure filtrate water tank for storage, the pressure filtrate in the pressure filtrate water tank is divided into two paths after passing through a water pump, one path of the pressure filtrate enters the low-temperature pressurized thermal hydrolysis device through a pressure filtrate recycling valve, the other path of the pressure filtrate enters an atomizing nozzle through a water pump outlet valve and an atomizing spray inlet electric valve, and the pressure filtrate is atomized by the atomizing nozzle and then sprayed into a hearth reburning area of a boiler for combustion.
The invention has the following beneficial effects:
the sludge dry-wet differentiation treatment system and the sludge dry-wet differentiation treatment method have the advantages that during specific operation, after sludge slurry is dehydrated in the mechanical dehydration device, dry sludge is sent into the original sludge treatment system for post-treatment, and the equipment investment and the environment-friendly operation cost of sludge coupling power generation can be reduced by depending on the existing environment-friendly equipment and power generation equipment of a unit. In addition, the pressure filtrate obtained after the sludge slurry is dehydrated in the mechanical dehydration device is sprayed and combusted or recycled to the low-temperature pressurized thermal hydrolysis device to be subjected to pressurized thermal hydrolysis with the newly fed sludge to form closed-loop treatment, so that the equipment investment of water treatment is savedxThe method has good effect on low-nitrogen emission reduction, and simultaneously solves the problems of high water content and low heat value of the sludge after the sludge is thermally hydrolyzed.
Furthermore, the number of the spraying branches is 2-8 to meet the spraying requirements under different loads, and the slurry spraying amount of each spraying branch can be freely switched through a valve during the operation of the boiler, so that the aims of accurate control and flexible operation are fulfilled.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a low-temperature pressurizing and pyrohydrolysis device, 2 is a mechanical dehydration device, 3 is a pressure filtrate water tank, 4 is a water pump, 5 is a pressure filtrate recycling valve, 6 is an atomizing spray valve group, 7 is a water pump outlet valve, 8 is an atomizing spray inlet electric valve, 9 is an atomizing nozzle, and 10 is a boiler.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the sludge dry-wet differentiation treatment system of the present invention includes a low-temperature pressurized thermal hydrolysis device 1, a mechanical dehydration device 2, a filtrate tank 3, a filtrate recycling valve 5, an atomizing spray valve set 6, a boiler 10, and a plurality of atomizing nozzles 9; the outlet of the low-temperature pressurized thermal hydrolysis device 1 is communicated with the inlet of the mechanical dehydration device 2, the dry sludge outlet of the mechanical dehydration device 2 is communicated with the sludge treatment system, the filtrate outlet of the mechanical dehydration device 2 is communicated with the inlet of the filtrate water tank 3, the outlet of the filtrate water tank 3 is divided into two paths by the water pump 4, one path is communicated with the low-temperature pressurized thermal hydrolysis device 1 through the filtrate reuse valve 5, the other path is communicated with the inlet of the atomization spray valve group 6, the inlet of each atomization nozzle 9 is communicated with the outlet of the atomization spray valve group 6, the outlet of each atomization nozzle 9 is communicated with the hearth of the boiler 10, and the outlet of each atomization nozzle 9 is positioned in the hearth reburning area of the boiler 10.
The atomization spraying valve group 6 comprises a plurality of spraying branches, wherein one spraying branch corresponds to one atomization nozzle 9, the inlet of each spraying branch is communicated with the water pump 4, the outlet of each spraying branch is communicated with the inlet of the corresponding atomization nozzle 9, and the number of the spraying branches is 2-8.
The sludge dry-wet differentiation treatment method comprises the following steps:
the sludge enters a low-temperature pressurized thermal hydrolysis device 1, is changed into a slurry state under the action of pressurized thermal hydrolysis and then is input into a mechanical dehydration device 2, the sludge slurry is mechanically dehydrated in the mechanical dehydration device 2, the dehydrated dry sludge enters a sludge treatment system for treatment, pressure filtrate output by the mechanical dehydration device 2 enters a pressure filtrate water tank 3 for storage, the pressure filtrate in the pressure filtrate water tank 3 is divided into two paths after passing through a water pump 4, one path of the pressure filtrate enters the low-temperature pressurized thermal hydrolysis device 1 through a pressure filtrate recycling valve 5, the other path of the pressure filtrate enters an atomizing nozzle 9 through a water pump outlet valve 7 and an atomizing spray inlet electric valve 8, and is atomized by the atomizing nozzle 9 and then sprayed into a hearth reburning area of a boiler 10 for burning.
The invention carries out dry-wet differentiation treatment on the product of sludge pyrohydrolysis, and then respectively sends the product into the existing sludge-related environmental protection equipment of the coal-fired unit and the boiler 10 for incineration treatment, thereby saving the equipment investment of water treatmentThe method can effectively solve the problems of high water content and low heat value of the slurry after the thermal hydrolysis of the sludge, and can inhibit NO in the furnace while harmlessly treating COD productsxThe generation of (2) enhances the low-nitrogen combustion effect, and can flexibly switch the spraying branch and the spraying flow according to the combustion state, thereby achieving the purposes of accurate control and flexible operation.
It should be noted that, in the sludge dry-wet differentiation treatment technology, during the specific operation, after the sludge slurry is dehydrated in the mechanical dehydration device 2, the dry sludge is sent into the original sludge treatment system for post-treatment and related use, and the existing environmental protection equipment and power generation equipment of the unit can be relied on to reduce the equipment investment and the environmental protection operation cost of sludge coupling power generation; the dehydrated filter pressing liquid can enter a post-treatment device for spray combustion or be recycled to the low-temperature pressurizing and pyrohydrolysis device 1 for pressurizing and pyrohydrolysis with newly fed sludge, so that closed-loop treatment is formed, and the equipment investment of water treatment is saved.
According to the invention, the product obtained after the sludge is subjected to pyrohydrolysis is subjected to dry-wet differentiation treatment and is respectively sent to the existing sludge-related environmental protection equipment of the coal-fired unit and the boiler 10 for incineration treatment, so that the equipment investment for water treatment is saved, the problems of high water content and low heat value of the slurry obtained after the sludge is subjected to pyrohydrolysis can be effectively solved, and the NO in the boiler can be inhibited while the COD product is subjected to harmless treatmentxThe generation of (2) enhances the low-nitrogen combustion effect, and can flexibly switch the spraying branch and the spraying flow according to the combustion state, thereby achieving the purposes of accurate control and flexible operation.
Claims (5)
1. A sludge dry-wet differentiation treatment system is characterized by comprising a low-temperature pressurization thermal hydrolysis device (1), a mechanical dehydration device (2), a filtrate pressing water tank (3), a filtrate pressing recycling valve (5), an atomization spraying valve group (6), a boiler (10) and a plurality of atomization nozzles (9);
the outlet of the low-temperature pressurizing and hot hydrolyzing device (1) is communicated with the inlet of the mechanical dehydrating device (2), the dry sludge outlet of the mechanical dehydrating device (2) is communicated with the sludge treatment system, the filtrate outlet of the mechanical dehydrating device (2) is communicated with the inlet of the filtrate water tank (3), the outlet of the filtrate water tank (3) is divided into two paths by the water pump (4), one path is communicated with the low-temperature pressurizing and hot hydrolyzing device (1) through the filtrate recycling valve (5), the other path is communicated with the inlet of the atomizing and spraying valve group (6), the inlet of each atomizing nozzle (9) is communicated with the outlet of the atomizing and spraying valve group (6), and the outlet of each atomizing nozzle (9) is communicated with the hearth of the boiler (10).
2. The sludge dry-wet differentiation treatment system according to claim 1, wherein the atomization spray valve set (6) comprises a plurality of spray branches, one spray branch corresponds to one atomization nozzle (9), the inlet of each spray branch is communicated with the water pump (4), and the outlet of each spray branch is communicated with the inlet of the corresponding atomization nozzle (9).
3. The system for dry-wet differentiation treatment of sludge according to claim 2, wherein the number of spraying branches is 2-8.
4. The sludge wet and dry differentiation treatment system according to claim 1, wherein the outlet of each atomizing nozzle (9) is located in the furnace reburning zone of the boiler (10).
5. The sludge dry-wet differentiation treatment method according to claim 2, wherein the sludge dry-wet differentiation treatment system comprises the following steps:
the method comprises the steps that sludge enters a low-temperature pressurized thermal hydrolysis device (1), the sludge is changed into a slurry state under the action of pressurized thermal hydrolysis and then is input into a mechanical dehydration device (2), the sludge slurry is mechanically dehydrated in the mechanical dehydration device (2), dehydrated dry sludge enters a sludge treatment system to be treated, filter press liquid output by the mechanical dehydration device (2) enters a filter press liquid water tank (3) to be stored, filter press liquid in the filter press liquid water tank (3) is divided into two paths through a water pump (4), one path enters the low-temperature pressurized thermal hydrolysis device (1) through a filter press liquid recycling valve (5), the other path enters an atomizing nozzle (9) through a water pump outlet valve (7) and an atomizing spray inlet electric valve (8), and the atomized sludge is sprayed into a hearth reburning area of a boiler (10) to be combusted after being atomized by the atomizing nozzle (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010238299.XA CN111268882A (en) | 2020-03-30 | 2020-03-30 | Sludge dry-wet differentiation treatment system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010238299.XA CN111268882A (en) | 2020-03-30 | 2020-03-30 | Sludge dry-wet differentiation treatment system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111268882A true CN111268882A (en) | 2020-06-12 |
Family
ID=70996158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010238299.XA Pending CN111268882A (en) | 2020-03-30 | 2020-03-30 | Sludge dry-wet differentiation treatment system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111268882A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008128465A1 (en) * | 2007-04-18 | 2008-10-30 | Shenzhen Eco-Solution Technology Corporation | System and progress for treating wet sludge by drying and incinerating |
| CN104355519A (en) * | 2014-10-29 | 2015-02-18 | 华南理工大学 | Comprehensive sludge treating method based on hydrothermal carbonization and fast microwave pyrolysis |
| CN107057787A (en) * | 2017-03-21 | 2017-08-18 | 浙江大学 | The method that coal conversion waste water cascade utilization prepares fuel slurry |
| CN110590120A (en) * | 2019-10-19 | 2019-12-20 | 哈尔滨工业大学 | Sludge steam conditioning high-dry dehydration coupling incineration integrated method and device |
-
2020
- 2020-03-30 CN CN202010238299.XA patent/CN111268882A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008128465A1 (en) * | 2007-04-18 | 2008-10-30 | Shenzhen Eco-Solution Technology Corporation | System and progress for treating wet sludge by drying and incinerating |
| CN104355519A (en) * | 2014-10-29 | 2015-02-18 | 华南理工大学 | Comprehensive sludge treating method based on hydrothermal carbonization and fast microwave pyrolysis |
| CN107057787A (en) * | 2017-03-21 | 2017-08-18 | 浙江大学 | The method that coal conversion waste water cascade utilization prepares fuel slurry |
| CN110590120A (en) * | 2019-10-19 | 2019-12-20 | 哈尔滨工业大学 | Sludge steam conditioning high-dry dehydration coupling incineration integrated method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111268882A (en) | Sludge dry-wet differentiation treatment system and method | |
| CN211946746U (en) | Sludge dry-wet differentiation treatment system | |
| CN111410971B (en) | Efficient and environment-friendly treatment system and treatment method for steel rolling oil sludge | |
| CN211946747U (en) | Totally enclosed sludge slurrying spraying system | |
| CN103292303A (en) | System and method for recycling latent heat of water steam in tail gas of Slapple activating furnace | |
| CN203295457U (en) | Normal-pressure oxygen-enriched continuous gasifying-gas and steam combined power generation heat supply equipment | |
| CN214218469U (en) | Wastewater zero-discharge treatment process device | |
| CN212051243U (en) | Efficient environment-friendly steel rolling oil sludge treatment system | |
| CN101732965A (en) | Novel thermoelectricity-textile printing combined cycle flue gas processing method and device thereof | |
| CN213060622U (en) | Desulfurization tower water saving fixtures of recovery sludge drying condensate water | |
| CN111285577A (en) | Totally-enclosed sludge slurrying spraying system and method | |
| CN213272635U (en) | Sludge water-coal slurry blending combustion system of coal-fired boiler | |
| CN211546312U (en) | Coal-fired power plant unit sludge low-temperature hydrothermal treatment system | |
| CN103265976B (en) | Method and device for ordinary-pressure oxygen-enriched continuous gasification-gas-steam combined cycle power-generation heat supply | |
| CN111520730A (en) | Sludge-water-coal-slurry co-combustion system for coal-fired boiler and working method thereof | |
| CN103629652B (en) | Method for recycling steam latent heat in SLEP activating furnace off-gas | |
| CN215831921U (en) | Waste incineration power plant waste heat comprehensive utilization system | |
| CN203113151U (en) | Cooling temperature-control system of fiber drying pipeline in fiberboard production line | |
| CN218442373U (en) | Waste heat recycling system for flue gas of incinerator | |
| CN220969072U (en) | Humic acid raw material hydrothermal oxidation degradation reaction system | |
| CN220601481U (en) | Exhaust steam recovery device | |
| CN103112983A (en) | Technical process and apparatus for sewage treatment in artificial wood board production | |
| CN103398387A (en) | Automatic sludge blending combustion system | |
| CN218328235U (en) | Waste water tail end solidification heat exchange system | |
| CN212673262U (en) | High salt waste water recycling system for hazardous waste incineration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |