CN111320352A - Sludge treatment equipment - Google Patents
Sludge treatment equipment Download PDFInfo
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- CN111320352A CN111320352A CN202010198619.3A CN202010198619A CN111320352A CN 111320352 A CN111320352 A CN 111320352A CN 202010198619 A CN202010198619 A CN 202010198619A CN 111320352 A CN111320352 A CN 111320352A
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- China
- Prior art keywords
- sludge
- pipeline
- drying
- air
- hot air
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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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- 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
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- 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
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention relates to the technical field of solid waste treatment, and discloses sludge treatment equipment which comprises a boiler, an air preheater, a sludge pre-drying system and a sludge mixing system, wherein a hot air pipeline is arranged at the outlet of the air preheater, a drying pipeline leading to the sludge pre-drying system is arranged in the hot air pipeline, an exhaust pipeline leading to the hot air pipeline or a cold air pipeline or a temperature adjusting pipeline is arranged in the sludge pre-drying system, the exhaust pipeline, the external hot air pipeline and the external cold air pipeline are integrated into the temperature adjusting pipeline leading to the sludge mixing system, the original outlet hot air of the air preheater is used as a heat source medium for sludge pre-drying, a special drying medium is not required to be extracted, and after sludge is pre-dried, the generated tail gas passes through the original pipeline system of the exhaust pipeline and finally enters the boiler for incineration treatment, so that the.
Description
Technical Field
The invention relates to the technical field of solid waste treatment, in particular to sludge treatment equipment.
Background
The sludge is an inevitable product for sewage treatment of the municipal sewage treatment plant, and has the disadvantages of large quantity, complex components, difficult treatment and high sludge treatment cost. The purpose of sludge treatment is to achieve reduction, stabilization, harmlessness and resource utilization, and mature sludge treatment methods include landfill, composting, incineration and the like. Among them, one of the most effective harmless treatment processes for high-temperature incineration of sludge is that through high-temperature decomposition and oxidation reactions, organic matters in the sludge can be almost completely decomposed, and inorganic compounds are also decomposed at high temperature into compounds with simple structures, thereby reducing toxicity and harm.
Because the heat value of the sludge is very low, the temperature of incineration is difficult to maintain, and the sludge is generally mixed with other fuel with higher heat value (mainly coal in China) to be combusted so as to maintain the combustion temperature, and the mode is called co-combustion. When sludge enters a coal-fired power plant boiler and is mixed with pulverized coal for burning, the feeding mode needs to be considered. Sludge is typically sent to power stations in several states: wet state (more than 80% of water content), primary drying (60-80% of water content) and deep drying (30-60% of water content). Higher moisture has a greater tendency for the sludge to clump, resulting in more difficult transport. General experience has shown that sludge moisture below 40% will facilitate transport.
The existing treatment mode is that sludge is pre-dried before entering a furnace to evaporate part of water so that the water content of the sludge reaches an acceptable degree, and then high-temperature incineration is carried out, the pre-drying adopts steam indirect heating or flue gas direct heating to heat the sludge so that steam is separated out from the sludge, the process can generate a large amount of tail gas containing substances such as dust, bacteria, volatile matters and the like from the sludge, a fine filtration process needs to be carried out on the generated tail gas, the treatment cost is increased, and the potential risk of environmental pollution also exists.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: how to realize synchronous predrying in the direct sludge treatment device and stop the secondary pollution of tail gas.
In order to solve the technical problem, the invention provides sludge treatment equipment which comprises a boiler, an air preheater, a sludge pre-drying system and a sludge mixing system, wherein the air preheater is arranged on the boiler, and the sludge pre-drying system, the sludge mixing system and the boiler are sequentially connected;
the outlet of the air preheater is provided with a hot air pipeline, the hot air pipeline and an external cold air pipeline are converged into a temperature regulating pipeline to be communicated with the sludge mixing system, the hot air pipeline is provided with a drying pipeline communicated with the sludge pre-drying system, and the sludge pre-drying system is provided with an exhaust pipeline communicated with the hot air pipeline or the cold air pipeline or the temperature regulating pipeline.
As a preferred scheme, the sludge pre-drying system comprises a wet sludge conveying device, a drying device and a dry sludge conveying device, wherein the wet sludge conveying device, the drying device and the dry sludge conveying device are sequentially connected, the dry sludge conveying device is connected with the sludge mixing system, a drying pipeline is connected with an air inlet of the drying device, and an exhaust pipeline is connected with an exhaust port of the drying device.
Preferably, a booster fan is arranged on the drying pipeline or the exhaust pipeline.
Preferably, the sludge mixing system comprises a feeding device and an abrasive device, the dry sludge conveying device, the feeding device, the abrasive device and the boiler are sequentially connected, and the temperature adjusting pipeline is communicated with the abrasive device.
Preferably, the device further comprises a sealing air system connected with the feeding device.
Preferably, the feeding device is a coal feeder, and the grinding device is a coal mill.
Preferably, the wet sludge conveying device and the dry sludge conveying device are mechanical conveying devices or pneumatic conveying devices.
Preferably, the drying device is a fluidized bed drying device or a drum drying device.
As a preferred scheme, the hot air pipeline is provided with a first regulating valve, and the cold air pipeline is provided with a second regulating valve.
As the preferred scheme, the cold air duct is provided with an air inlet channel leading to the air preheater.
Compared with the prior art, the sludge treatment equipment provided by the invention has the beneficial effects that:
the boiler is provided with the air preheater, on one hand, temperature-adjusting gas is provided by the air preheater and is fed into the sludge mixing system for mixing and stirring, materials can be quickly mixed and then mixed and burnt at a proper environmental temperature, on the other hand, the drying pipeline leading to the sludge pre-drying system is led out from the hot air pipeline of the air preheater, original hot air is used as a heat source medium for sludge pre-drying, a special drying medium is not required to be extracted, and after sludge is pre-dried, generated tail gas is sent back to the hot air pipeline or the cold air pipeline or the temperature-adjusting pipeline through the exhaust pipeline, namely the tail gas is sent back to the original pipeline system and finally enters the boiler for burning treatment, so that the problem of secondary pollution of the tail gas is effectively solved, and the equipment structure required by sludge mixing and burning is simplified, greatly reducing the processing cost.
Drawings
FIG. 1 is a schematic configuration diagram of a sludge treatment apparatus according to a preferred embodiment of the present invention.
In the figure: 1. a boiler; 2. an air preheater; 3. a hot air duct; 4. a cold air duct; 5. a temperature-regulating pipeline; 6. a drying pipeline; 7. an exhaust duct; 8. a wet sludge conveying device; 9. a drying device; 10. a dry sludge conveying device; 11. a booster fan; 12. a feeding device; 13. an abrasive device; 14. sealing the air system; 15. an air inlet channel; 16. a first regulating valve; 17. a second regulator valve.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the terms "connected," "fixed," and the like are used in a broad sense, and for example, the terms "connected," "connected," and "fixed" may be fixed, detachable, or integrated; the connection can be mechanical connection or welding connection; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, a preferred embodiment of the present invention provides a sludge treatment apparatus, which includes a boiler 1, an air preheater 2, a sludge pre-drying system and a sludge mixing system, wherein the air preheater 2 is disposed on the boiler 1, and the sludge pre-drying system, the sludge mixing system and the boiler 1 are sequentially connected;
the outlet of the air preheater 2 is provided with a hot air pipeline 3, the hot air pipeline 3 and an external cold air pipeline 4 are converged into a temperature adjusting pipeline 5 to be communicated with the sludge mixing system, the hot air pipeline 3 is provided with a drying pipeline 6 communicated with the sludge pre-drying system, and the sludge pre-drying system is provided with an exhaust pipeline 7 communicated with the hot air pipeline 3 or the cold air pipeline 4 or the temperature adjusting pipeline 5.
Based on the sludge treatment equipment with the technical characteristics, the boiler 1 is provided with the air preheater 2, on one hand, temperature-adjusting gas is provided by the air preheater 2 and is sent into the sludge mixing system for mixing and stirring, materials can be quickly mixed and then mixed and burned at a proper environmental temperature, on the other hand, the drying pipeline 6 leading to the sludge pre-drying system is led out from the hot air pipeline 3 of the air preheater 2, original hot air is used as a heat source medium for sludge pre-drying, a special drying medium does not need to be extracted, and after sludge pre-drying, generated tail gas is sent back to the hot air pipeline 3 or the cold air pipeline 4 or the temperature-adjusting pipeline 5 through the exhaust pipeline 7, namely is sent back to the original pipeline system and finally enters the boiler 1 for incineration treatment, so that the problem of secondary pollution of tail gas is effectively solved, the equipment structure required by sludge blending combustion is simplified, and the treatment cost is greatly reduced.
In the embodiment, the sludge pre-drying system comprises a wet sludge conveying device 8, a drying device 9 and a dry sludge conveying device 10, the wet sludge conveying device 8, the drying device 9 and the dry sludge conveying device 10 are connected in sequence, the dry sludge conveying device 10 is connected with the sludge mixing system, the drying pipeline 6 is connected with the air inlet of the drying device 9, the exhaust pipeline 7 is connected with the exhaust port of the drying device 9, wet sludge is conveyed to the drying device 9 through the wet sludge conveying device 8, wet sludge is pre-dried in the drying device 9 by utilizing hot air in the drying pipeline 6, generated tail gas is sent back to an original pipeline system through the exhaust pipeline 7, and special drying media do not need to be extracted and special treatment is carried out on the tail gas generated by pre-drying. Furthermore, a booster fan 11 is arranged on the drying pipeline 6, the extracted hot air is pressurized and then sent into the drying device 9, the drying speed of the wet sludge is accelerated, the extracted hot air amount can be controlled by adjusting the booster fan 11 in a variable speed mode, the extracted hot air amount is in direct proportion to the wet sludge amount or the water content to be dried, and devices such as an adjusting valve and the like can be arranged on the drying pipeline 6 to achieve the same performance.
In this embodiment, the sludge mixing system includes a feeding device 12 and an abrasive device 13, the dry sludge conveying device 10, the feeding device 12, the abrasive device 13 and the boiler 1 are connected in sequence, and the temperature adjusting pipeline 5 leads to the abrasive device 13. The dry sludge formed after the pre-drying is conveyed to a feeding device 12 through a dry sludge conveying device 10, is combined with various fuels of the feeding device 12, enters a grinding device 13 to be ground and mixed, and is finally conveyed to the boiler 1 to be incinerated at high temperature, and in the process, tail gas generated by the pre-drying is conveyed to the boiler 1 to be treated in a centralized manner, so that the problem of secondary pollution of the tail gas is effectively solved.
The drying device 9 can be a fluidized bed type drying device or a drum type drying device with mature technology, and can be realized by selecting any direct contact type (direct contact of materials and drying gas) drying device; the wet sludge conveying device 8 and the dry sludge conveying device 10 are mechanical conveying devices such as a belt conveyor and a roller conveying device, or pneumatic conveying devices such as a suction conveying type pneumatic conveyor and an air blowing and pressure conveying type pneumatic conveyor, and the conveying function of the wet sludge and the dry sludge can be realized, or the wet sludge and the dry sludge can be mixed and conveyed in multiple stages and multiple ways, and the conveying process is not limited by the invention according to the conveying process requirements. In addition, what feeder 12 adopted is the coal feeder, what abrasive device 13 adopted is the coal pulverizer, realizes will dry mud and fire coal are smashed and are mixed, send into at last boiler 1 burns, can understand that this treatment facility can also be applied to the material similar with mud, for example coal slime and the fire coal that coal washing produced mix burning in boiler 1, if the predrying principle who adopts is the same with this scheme, also belongs to the equivalent scheme of this scheme.
In this embodiment, a sealing air system 14 connected to the feeding device 12 is further included, and the sealing air system 14 is an optional system for isolating and sealing the air outside and the air in the processing process inside the equipment to avoid leakage and polluting the working environment, but when the wet sludge conveying device 8 and the dry sludge conveying device 10 adopt a positive pressure pneumatic conveying mode, the sealing air system 14 may not be adopted.
In this embodiment, cold air duct 4 is equipped with the access to air heater 2's inlet air channel 15, for air heater 2 provides the air that needs to heat, need not to reset hot blast blowpipe apparatus, reduces arranging of pipeline for overall structure is compacter.
In this embodiment, the hot air duct 3 is provided with a first regulating valve 16, the cold air duct 4 is provided with a second regulating valve 17, the respective intake amounts of hot air and cold air are regulated, air reaching a suitable temperature is sent into the drying device 9 through the temperature regulating duct 5, the temperature regulating duct 5 is further provided with a temperature detector and other measuring elements, fig. 1 is only a schematic diagram, and not all devices, valves, ducts, measuring elements and other components which show process requirements are included, and these supporting or accessory systems in the apparatus are all the prior art, and the present invention is not described herein again.
To sum up, the embodiment of the invention provides a sludge treatment device which has the following advantages: (1) the hot air drying medium of the wet sludge is led out from the hot air of the original equipment system, and no additional drying medium is needed; (2) after drying, the tail gas is sent back to the original equipment system for incineration, new tail gas is not generated, and secondary pollution is not generated; (3) the proportion of the extracted hot air can be adjusted according to the total amount and the water content of the wet sludge to be dried, so that the drying requirement is met.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. The sludge treatment equipment is characterized by comprising a boiler, an air preheater, a sludge pre-drying system and a sludge mixing system, wherein the air preheater is arranged on the boiler, and the sludge pre-drying system, the sludge mixing system and the boiler are sequentially connected;
the outlet of the air preheater is provided with a hot air pipeline, the hot air pipeline and an external cold air pipeline are converged into a temperature regulating pipeline to be communicated with the sludge mixing system, the hot air pipeline is provided with a drying pipeline communicated with the sludge pre-drying system, and the sludge pre-drying system is provided with an exhaust pipeline communicated with the hot air pipeline or the cold air pipeline or the temperature regulating pipeline.
2. The sludge treatment apparatus according to claim 1, wherein the sludge pre-drying system comprises a wet sludge conveying device, a drying device and a dry sludge conveying device, the wet sludge conveying device, the drying device and the dry sludge conveying device are connected in sequence, the dry sludge conveying device is connected with the sludge mixing system, the drying pipeline is connected with an air inlet of the drying device, and the exhaust pipeline is connected with an air outlet of the drying device.
3. The sludge treatment apparatus according to claim 2, wherein a booster fan is provided on the drying pipe or the exhaust pipe.
4. The sludge treatment apparatus according to claim 2, wherein the sludge mixing system comprises a feeding device and an abrasive device, the dry sludge conveying device, the feeding device, the abrasive device and the boiler are connected in sequence, and the temperature adjusting pipeline leads to the abrasive device.
5. The sludge treatment apparatus of claim 4 further comprising a seal air system connected to the feed device.
6. The sludge treatment apparatus of claim 4 wherein the feeding device is a coal feeder and the abrasive device is a coal mill.
7. The sludge treatment apparatus according to claim 2, wherein the wet sludge transport means and the dry sludge transport means are mechanical transport means or pneumatic transport means.
8. The sludge treatment apparatus according to claim 2, wherein the drying device is a fluidized bed type drying device or a drum type drying device.
9. The sludge treatment apparatus according to any of the claims 1 to 8, wherein the hot air duct is provided with a first regulating valve and the cold air duct is provided with a second regulating valve.
10. The sludge treatment apparatus according to any one of claims 1 to 8, wherein the cold air duct is provided with an air intake channel leading to the air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198619.3A CN111320352B (en) | 2020-03-19 | 2020-03-19 | Sludge treatment equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010198619.3A CN111320352B (en) | 2020-03-19 | 2020-03-19 | Sludge treatment equipment |
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| CN111320352A true CN111320352A (en) | 2020-06-23 |
| CN111320352B CN111320352B (en) | 2022-05-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178671A (en) * | 2020-09-30 | 2021-01-05 | 西安热工研究院有限公司 | Method and system suitable for increasing direct blending combustion proportion of wet coal slime for pulverized coal fired boiler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61153407A (en) * | 1984-12-27 | 1986-07-12 | Mitsubishi Heavy Ind Ltd | Incinerating method of sludge |
| CN104132363A (en) * | 2014-07-31 | 2014-11-05 | 上海理工大学 | Open powder making steam warm air type boiler unit and power generation system thereof |
| CN107388263A (en) * | 2017-05-05 | 2017-11-24 | 江苏绿威环保科技有限公司 | A kind of sludge collaboration burning processing system and processing method |
| CN107522382A (en) * | 2017-09-26 | 2017-12-29 | 江苏中圣高科技产业有限公司 | A kind of sludge drying-incineration integrated system using solar source |
| CN108954277A (en) * | 2018-08-06 | 2018-12-07 | 西安热工研究院有限公司 | One kind is with ball mill pulverized coal preparation system and utilizes flue gas dewatered sludge coupled electricity-generation system |
| CN109519915A (en) * | 2018-12-25 | 2019-03-26 | 西安热工研究院有限公司 | A kind of sludge/the biomass processor and method of coal-fired power station boiler |
| CN109681898A (en) * | 2019-01-22 | 2019-04-26 | 上海电力学院 | Phase transformation heat pipe-type power plant's First air heats thermoregulating system |
-
2020
- 2020-03-19 CN CN202010198619.3A patent/CN111320352B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61153407A (en) * | 1984-12-27 | 1986-07-12 | Mitsubishi Heavy Ind Ltd | Incinerating method of sludge |
| CN104132363A (en) * | 2014-07-31 | 2014-11-05 | 上海理工大学 | Open powder making steam warm air type boiler unit and power generation system thereof |
| CN107388263A (en) * | 2017-05-05 | 2017-11-24 | 江苏绿威环保科技有限公司 | A kind of sludge collaboration burning processing system and processing method |
| CN107522382A (en) * | 2017-09-26 | 2017-12-29 | 江苏中圣高科技产业有限公司 | A kind of sludge drying-incineration integrated system using solar source |
| CN108954277A (en) * | 2018-08-06 | 2018-12-07 | 西安热工研究院有限公司 | One kind is with ball mill pulverized coal preparation system and utilizes flue gas dewatered sludge coupled electricity-generation system |
| CN109519915A (en) * | 2018-12-25 | 2019-03-26 | 西安热工研究院有限公司 | A kind of sludge/the biomass processor and method of coal-fired power station boiler |
| CN109681898A (en) * | 2019-01-22 | 2019-04-26 | 上海电力学院 | Phase transformation heat pipe-type power plant's First air heats thermoregulating system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178671A (en) * | 2020-09-30 | 2021-01-05 | 西安热工研究院有限公司 | Method and system suitable for increasing direct blending combustion proportion of wet coal slime for pulverized coal fired boiler |
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| CN111320352B (en) | 2022-05-17 |
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