CN113620561A - Novel sludge drying heat recovery system - Google Patents
Novel sludge drying heat recovery system Download PDFInfo
- Publication number
- CN113620561A CN113620561A CN202010380838.3A CN202010380838A CN113620561A CN 113620561 A CN113620561 A CN 113620561A CN 202010380838 A CN202010380838 A CN 202010380838A CN 113620561 A CN113620561 A CN 113620561A
- Authority
- CN
- China
- Prior art keywords
- sludge
- heat
- incinerator
- deaerator
- drier
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 47
- 238000001035 drying Methods 0.000 title claims abstract description 17
- 238000011084 recovery Methods 0.000 title claims abstract description 10
- 239000002918 waste heat Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims abstract description 9
- 230000007613 environmental effect Effects 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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
- C02F11/12—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
Abstract
A novel sludge drying heat recovery system relates to the technical field of drying incineration disposal and environmental protection of municipal sludge. The system comprises a drier, a sludge incinerator, an air preheater and a waste heat boiler which are connected in sequence. The waste heat boiler forms closed circulation through the deaerator and the water supply pump. The structure is characterized in that a heat recoverer is arranged between the drier and the sludge incinerator, the heat recoverer is connected with a deaerator, and the lower part of the sludge incinerator is connected with a afterburning device for conveying supplementary fuel. Compared with the prior art, the sensible heat of the condensed water in the drying machine is utilized, so that the utilization rate of steam heat is improved, the quantity of supplemented fuel required by the incinerator is reduced, and the thermal performance of the device is improved.
Description
Technical Field
The invention relates to the technical field of municipal sludge drying incineration disposal and environmental protection, in particular to a novel sludge drying heat recovery system.
Background
The sludge drying and incineration disposal technology has been applied to many countries as a mature technology, and the disposal mode is an efficient, harmless and environment-friendly technology in a plurality of sludge disposal modes, and for sludge with higher heat value, steam generated in the disposal process can be used for driving a steam turbine to generate electricity, so that economic benefits are generated.
At present, the sludge treatment mode is still in the beginning stage in China, the actual engineering application is less, and meanwhile, the theoretical research on the aspect is not much by domestic scientific research institutions. For the mature sludge treatment process system at present, a lot of optimization spaces exist in the aspects of a plurality of thermal systems, mechanical conveying, sludge drying and the like.
In the prior art, in a conventional sludge drying and incinerating project, after high-temperature steam dries wet sludge, the wet sludge carries a large amount of heat, but the heat is not effectively utilized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a novel heat recovery system for sludge drying. The sensible heat of the condensed water in the drier is utilized, so that the utilization rate of steam heat is improved, the quantity of supplemented fuel required by the incinerator is reduced, and the thermal performance of the system is improved.
In order to achieve the above object, the technical solution of the present invention is implemented as follows:
a novel sludge drying heat recovery system comprises a drier, a sludge incinerator, an air preheater and a waste heat boiler which are connected in sequence. The waste heat boiler forms closed circulation through the deaerator and the water supply pump. The structure is characterized in that a heat recoverer is arranged between the drier and the sludge incinerator, the heat recoverer is connected with a deaerator, and the lower part of the sludge incinerator is connected with a afterburning device for conveying supplementary fuel.
Due to the adoption of the structure, compared with the prior art, the invention has the following advantages and beneficial effects:
1. compared with the conventional sludge drying system, the heat recoverer provided by the invention utilizes the heat in the condensed water of the drying machine, and the utilization rate of the steam heat is higher.
2. Compared with the conventional sludge drying and incinerating system, the sludge dryness degree conveyed into the incinerator by the system is higher, less supplementary fuel is required under the condition of meeting the operating requirement of the incinerator, and the economic performance of the whole system is improved.
The invention is further described with reference to the following figures and detailed description.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
Referring to fig. 1, the heat recovery system for sludge drying of the present invention comprises a drier, a heat recoverer, a sludge incinerator, an air preheater and a waste heat boiler which are connected in sequence. The waste heat boiler forms closed circulation through the deaerator and the water supply pump, the heat recovery device is connected with the deaerator, and the lower portion of the sludge incinerator is connected with a afterburning device for conveying supplementary fuel.
The operation process of the heat recovery system comprises the following steps:
the wet sludge 1 enters a drier through a conveying system, and saturated steam generated by a waste heat boiler in the drier transfers heat to the wet sludge. After the wet sludge 1 is heated, the moisture in the wet sludge is evaporated to form dry sludge 2, and the dry sludge 2 is sent into the sludge incinerator through the heat recoverer. In the sludge incinerator, the dry sludge 2 is burnt and burnt out in the sludge incinerator under the combined action of the high-temperature fluidizing air 7 and the supplementary fuel 13 natural gas for auxiliary combustion.
High-temperature flue gas 3 generated by combustion stays in a sludge incinerator hearth at the temperature of not less than 850 ℃ for 2 seconds and then enters an air preheater to heat fluidizing air 6, the heated high-temperature fluidizing air 7 is sent into the sludge incinerator through an air distribution pipe, and a heat carrier (quartz sand) turbulently moves in the sludge incinerator under the action of the high-temperature fluidizing air 7 and supplementary fuel 13. The hot flue gas 4 after the heat exchange in the air preheater is finished enters a waste heat boiler, and the flue gas in the waste heat boiler exchanges heat with feed water to generate saturated steam. A part of the saturated steam I9 enters a drier to dry wet sludge; and the other part of the saturated steam II 12 enters a deaerator for the deaerator to run, and the condensed water 8 deaerated by the deaerator is sent into the waste heat boiler through a water feeding pump. And the flue gas 5 at the outlet of the waste heat boiler enters a tail gas treatment system for treatment.
Claims (1)
1. A novel sludge drying heat recovery system comprises a drier, a sludge incinerator, an air preheater and a waste heat boiler which are connected in sequence, and further comprises a water feeding pump and a deaerator, wherein the waste heat boiler forms closed circulation through the deaerator and the water feeding pump; the device is characterized in that a heat recoverer is arranged between the drier and the sludge incinerator, the heat recoverer is connected with a deaerator, and the lower part of the sludge incinerator is connected with a afterburning device for conveying supplementary fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010380838.3A CN113620561A (en) | 2020-05-08 | 2020-05-08 | Novel sludge drying heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010380838.3A CN113620561A (en) | 2020-05-08 | 2020-05-08 | Novel sludge drying heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113620561A true CN113620561A (en) | 2021-11-09 |
Family
ID=78377125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010380838.3A Pending CN113620561A (en) | 2020-05-08 | 2020-05-08 | Novel sludge drying heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113620561A (en) |
Citations (10)
| 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 |
| CN201884079U (en) * | 2010-12-02 | 2011-06-29 | 济南市琦泉热电有限责任公司 | Heat regenerative system of steam turbine generator unit capable of utilizing waste heat of heat conducting oil furnace in calcination plant |
| CN103388817A (en) * | 2013-07-16 | 2013-11-13 | 广西华锐钢铁工程设计咨询有限责任公司 | Residual heat recovery system of sewage water of coke dry quenching boiler |
| CN104016564A (en) * | 2014-06-23 | 2014-09-03 | 王子国 | Sludge multi-effect drying incineration treatment system and application method thereof |
| CN104033911A (en) * | 2014-06-30 | 2014-09-10 | 南京德邦金属装备工程股份有限公司 | Sludge drying and incinerating system |
| CN108167028A (en) * | 2018-01-02 | 2018-06-15 | 武汉都市环保工程技术股份有限公司 | A kind of waste incineration and generating electricity system |
| CN209263045U (en) * | 2018-12-05 | 2019-08-16 | 同方环境股份有限公司 | A kind of novel sludge incineration residual heat using device |
| CN209567976U (en) * | 2019-01-07 | 2019-11-01 | 苏州沃迈德电气科技有限公司 | A kind of sludge drying and incineration system |
| CN110726133A (en) * | 2019-09-26 | 2020-01-24 | 首钢京唐钢铁联合有限责任公司 | Method and device for reducing dissolved oxygen in water supply of CCPP (combined cycle process control) waste heat boiler |
| CN212198988U (en) * | 2020-05-08 | 2020-12-22 | 同方环境股份有限公司 | Novel sludge drying heat recovery device |
-
2020
- 2020-05-08 CN CN202010380838.3A patent/CN113620561A/en active Pending
Patent Citations (10)
| 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 |
| CN201884079U (en) * | 2010-12-02 | 2011-06-29 | 济南市琦泉热电有限责任公司 | Heat regenerative system of steam turbine generator unit capable of utilizing waste heat of heat conducting oil furnace in calcination plant |
| CN103388817A (en) * | 2013-07-16 | 2013-11-13 | 广西华锐钢铁工程设计咨询有限责任公司 | Residual heat recovery system of sewage water of coke dry quenching boiler |
| CN104016564A (en) * | 2014-06-23 | 2014-09-03 | 王子国 | Sludge multi-effect drying incineration treatment system and application method thereof |
| CN104033911A (en) * | 2014-06-30 | 2014-09-10 | 南京德邦金属装备工程股份有限公司 | Sludge drying and incinerating system |
| CN108167028A (en) * | 2018-01-02 | 2018-06-15 | 武汉都市环保工程技术股份有限公司 | A kind of waste incineration and generating electricity system |
| CN209263045U (en) * | 2018-12-05 | 2019-08-16 | 同方环境股份有限公司 | A kind of novel sludge incineration residual heat using device |
| CN209567976U (en) * | 2019-01-07 | 2019-11-01 | 苏州沃迈德电气科技有限公司 | A kind of sludge drying and incineration system |
| CN110726133A (en) * | 2019-09-26 | 2020-01-24 | 首钢京唐钢铁联合有限责任公司 | Method and device for reducing dissolved oxygen in water supply of CCPP (combined cycle process control) waste heat boiler |
| CN212198988U (en) * | 2020-05-08 | 2020-12-22 | 同方环境股份有限公司 | Novel sludge drying heat recovery device |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20211109 |