CN216693565U - Waste incineration device for co-combustion of sludge - Google Patents
Waste incineration device for co-combustion of sludge Download PDFInfo
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- CN216693565U CN216693565U CN202123157424.3U CN202123157424U CN216693565U CN 216693565 U CN216693565 U CN 216693565U CN 202123157424 U CN202123157424 U CN 202123157424U CN 216693565 U CN216693565 U CN 216693565U
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- vacuum dryer
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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
- Y02E20/12—Heat utilisation in combustion or incineration of waste
Abstract
The utility model discloses a waste incineration device for co-combustion of sludge, which comprises a waste incinerator, a first heat exchanger, a second heat exchanger and a deaerator, wherein the first heat exchanger is connected with the first heat exchanger; the vacuum dryer is characterized by further comprising a vacuum dryer and an ejector, wherein the ejector is arranged at a gas outlet of the vacuum dryer, and the gas outlet of the vacuum dryer is communicated with a low-pressure inlet of the ejector; and a sludge outlet of the vacuum dryer is connected with a sludge inlet of the garbage incinerator. The utility model has the following beneficial effects: the residual pressure of high-pressure steam in the waste incineration system is utilized to dry the sludge with high water content, stable combustion of low-calorific-value waste and the dried sludge is realized under the condition that the use of high-calorific-value auxiliary fuel is not increased, and the waste incineration system has the advantages of compact equipment arrangement, small occupied area, safe and reliable operation, easiness in maintenance, low energy consumption, lower operation cost and the like; greatly improves the comprehensive utilization degree of the energy waste heat and the excess pressure and improves the economic benefit of the waste incineration plant.
Description
Technical Field
The utility model relates to the technical field of incineration treatment of garbage and sludge, in particular to a garbage incineration device for co-combusting sludge.
Background
With the rapid development of the urbanization process, the amount of the collected domestic garbage is increased day by day; in addition, along with the improvement of living standard of people, the awareness of environmental protection is higher and higher, and garbage is collected gradually and then is treated in a centralized manner. Particularly, the urban domestic garbage is collected and then is treated in a centralized way, and partial areas are also classified and collected. The collected garbage is incinerated to generate electricity, which is a main mode of harmless, recycling and reduction treatment of the garbage.
The domestic garbage has high water content, low heat value and is not easy to burn. In order to enable garbage to be rapidly combusted and improve the heat value, high-temperature and high-pressure steam extracted from a garbage incinerator is used for preheating combustion air in the prior art so as to improve the combustion heat value of the garbage. Specifically, as shown in fig. 1, two high-pressure steams of a garbage incinerator 1 release heat through a first heat exchanger 2 and a second heat exchanger 3 respectively, then enter a deaerator 6 in a centralized manner and are condensed; the combustion-supporting air 4 is preheated to 260 ℃ through the second heat exchanger 3 and the first heat exchanger 2 respectively under the driving of the fan 5, and then is injected into the garbage incinerator 1 to support combustion so as to meet the combustion demand of high-moisture garbage. Although above-mentioned current structure can improve waste incinerator 1's combustion efficiency, 2 steam still have very high residual pressure after preheating the air and directly discharge through oxygen-eliminating device 6, can not make full use of excess pressure, lead to resource utilization not high, and calorific loss is serious.
In addition, the output of domestic sludge is more and more at present, and the landfill method is far from meeting the requirements and needs to be incinerated. The mixed burning with the household garbage is a better treatment method. The sludge is essence of pollutants in the sewage treatment process, has the problems of high water content, easy decay, foul smell, heavy metal and other organic pollutants and the like, and can pollute underground water, surface water and soil without effective treatment. In addition, the food chain hazard and odor pollution brought by the sludge cannot be ignored. At present, the main means for making sludge harmless is to use incineration, but it is preferable that the water content of the sludge is reduced to 10% or less. At present, the water content of the sludge is only reduced to 65% at most after the sludge is mechanically dehydrated in a sewage plant, and secondary drying treatment is required. The conventional reduction technology for sludge heat drying consumes a large amount of energy, has high cost, and has the defects that the water content is difficult to reduce to below 20 percent due to the extremely difficult removal of the internal water, so that an energy-saving drying technology capable of reducing the water content of the sludge to below 10 percent is urgently needed to be found. The problem can be perfectly solved by adopting a sludge vacuum drying technology, and the sludge with the water content of only 10 percent also has higher calorific value (up to more than 2000 Kcal) and can be completely mixed with garbage for incineration, so that the harmless treatment of the sludge is realized, and the effect of killing two birds with one stone is achieved. Therefore, there is a need for improvement of the existing waste incineration equipment to meet the requirement of mixed incineration of sludge and waste.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a garbage incineration device which can efficiently dry sludge and co-incinerate the sludge, and can be used for drying the sludge and solving the problems that wet sludge is difficult to combust and the treatment cost is high.
In order to solve the technical problems, the utility model adopts the technical scheme that: a waste incineration device for co-combustion of sludge comprises a waste incinerator, a first heat exchanger, a second heat exchanger and a deaerator; a high-temperature steam outlet of the garbage incinerator is connected with a steam inlet of a first heat exchanger, and a steam outlet of the first heat exchanger is connected with a deaerator; a low-temperature steam outlet of the garbage incinerator is connected with a steam inlet of a second heat exchanger, and a steam outlet of the second heat exchanger is connected with a deaerator; combustion-supporting air is driven by a fan to pass through the air side of the second heat exchanger and the air side of the first heat exchanger in sequence, and is heated and then is connected with a combustion-supporting air inlet of the garbage incinerator;
the vacuum drying device further comprises a vacuum dryer and an ejector, wherein the ejector is arranged at a gas outlet of the vacuum dryer, and the gas outlet is communicated with a low-pressure inlet of the ejector; and a sludge outlet of the vacuum dryer is connected with an inlet of the garbage incinerator.
And a jacket for heating is arranged on the outer side plate of the vacuum dryer.
The steam outlet of the first heat exchanger is provided with a branch pipeline connected with a high-pressure inlet of an ejector, the outlet of the ejector is connected with the jacket through a pipeline, and the outlet of the jacket is connected with a wastewater pool.
The sewage treatment tank is connected with a landfill leachate pipeline and is used for collecting the water-vapor mixture and the landfill leachate after heat exchange.
The sludge bin is connected with a sludge inlet of the vacuum drier through a first screw conveying device, and wet sludge with the water content of about 60% is conveyed into the vacuum drier for vacuum heating and drying.
The vacuum dryer is connected with an inlet of the garbage incinerator through a second screw conveying device, and sludge with the water content of 10% after vacuum drying is sent into the garbage incinerator to be mixed with garbage for incineration.
Compared with the prior art, the utility model has the following beneficial effects: air in the vacuum drier and water vapor in the sludge are pumped out by utilizing the injection effect of the residual pressure of the high-pressure steam in the waste incineration system, so that the sludge drying efficiency is greatly improved; the mixture of high-pressure steam, air and water vapor in the sludge is condensed in a jacket of a vacuum heater to release heat, so that the heat required by vacuum drying of the sludge is ensured, and the waste heat of the high-pressure steam is fully utilized; the sludge drying device can realize the sludge drying of high moisture without increasing the use of high-calorific-value auxiliary fuel, ensures the stable combustion of low-calorific-value garbage and sludge, and has the advantages of compact equipment arrangement, small occupied area, safe and reliable operation, easy maintenance, low energy consumption, lower operation cost and the like; greatly improves the comprehensive utilization degree of the energy waste heat and the excess pressure and improves the economic benefit of the waste incineration plant.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a prior art structure;
FIG. 2 is a schematic structural diagram of a waste incineration device for co-combustion of sludge according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A waste incineration device for co-combustion of sludge, as shown in fig. 2, comprises a waste incinerator 1, a first heat exchanger 2, a second heat exchanger 3 and a deaerator 6. A high-temperature steam outlet of the garbage incinerator 1 is connected with a steam inlet of the first heat exchanger 2, and a steam outlet of the first heat exchanger 2 is connected with the deaerator 6; the low-temperature steam outlet of the garbage incinerator 1 is connected with the steam inlet of the second heat exchanger 3, and the steam outlet of the second heat exchanger 3 is connected with the deaerator 6. The combustion-supporting air 4 is driven by a fan 5 to sequentially pass through the air side of the second heat exchanger 3 and the air side of the first heat exchanger 2 to absorb heat and raise the temperature, and then is connected with a combustion-supporting air inlet of the garbage incinerator 1. The temperature of the high-temperature steam outlet is about 380 ℃, the pressure is about 30 kilograms, the temperature of the low-temperature steam outlet is about 184 ℃, the pressure is about 13 kilograms, the air at the temperature of 20 ℃ is heated to 260 ℃ after passing through the second heat exchanger 3 and the first heat exchanger 2 in sequence, and then enters the garbage incinerator 1, the garbage combustion temperature can be effectively improved, but most of the residual heat and pressure are not fully utilized.
In order to effectively recycle the residual heat and pressure and simultaneously dry and incinerate the sludge to realize mixed incineration of the sludge and the garbage, on the basis of the structure, the garbage incineration device for mixed incineration of the sludge further comprises a vacuum dryer 9 and an ejector 7, wherein the ejector 7 is arranged at a gas outlet of the vacuum dryer 9, and the gas outlet is communicated with a low-pressure inlet of the ejector 7; a jacket 91 for heating is provided on the outer side plate of the vacuum dryer 9; the steam outlet of the first heat exchanger 2 is provided with a branch pipeline connected with the high-pressure inlet of the ejector 7, the outlet of the ejector 7 is connected with the jacket 91 through a pipeline, and the outlet of the jacket 91 is connected with the wastewater pool 11. And the waste water tank 11 is connected with the landfill leachate 12 through a pipeline and is used for collecting the water-vapor mixture and the landfill leachate after heat exchange. The sludge bin 8 is connected with a sludge inlet of the vacuum drier 9 through a screw conveying device 10, and conveys wet sludge with the water content of about 60% into the vacuum drier 9 for vacuum drying and heating. The air and the steam in the vacuum drier 9 are brought out under the action of the negative pressure of the ejector 7, and are condensed together with the high-temperature high-pressure steam in the jacket 91 to release heat so as to heat the vacuum drier 9, so that the residual heat and the residual pressure of the high-temperature high-pressure steam are recycled. A first valve 101 is provided at the sludge inlet of the vacuum dryer 9 for closing during drying to form a vacuum environment. The sludge outlet of the vacuum drier 9 is connected with the inlet of the garbage incinerator 1 through a second screw conveying device 13, and the sludge with high heat value and the moisture content of 10% after vacuum drying is sent into the garbage incinerator 1 to be mixed with garbage for incineration and power generation. A second valve 131 is provided at the sludge outlet of the vacuum dryer 9 for closing together with the first valve 101 at the time of drying to form a vacuum environment.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A waste incineration device for co-combustion of sludge comprises a waste incinerator, a first heat exchanger, a second heat exchanger and a deaerator; a high-temperature steam outlet of the garbage incinerator is connected with a steam inlet of a first heat exchanger, and a steam outlet of the first heat exchanger is connected with a deaerator; a low-temperature steam outlet of the garbage incinerator is connected with a steam inlet of a second heat exchanger, and a steam outlet of the second heat exchanger is connected with a deaerator; combustion-supporting air is driven by a fan to sequentially pass through the air sides of the second heat exchanger and the first heat exchanger and then is connected with a combustion-supporting air inlet of the garbage incinerator; the method is characterized in that: the vacuum drying device further comprises a vacuum dryer and an ejector, wherein the ejector is arranged at a gas outlet of the vacuum dryer, and the gas outlet is communicated with a low-pressure inlet of the ejector; and a material outlet of the vacuum drier is connected with an inlet of the garbage incinerator.
2. The waste incineration device for co-firing sludge as set forth in claim 1, wherein a jacket for heating is provided on the outer panel of the vacuum dryer.
3. The waste incineration device for the co-combustion of sludge according to claim 2, wherein the steam outlet of the first heat exchanger is provided with a branch pipe line connected with the high-pressure inlet of the ejector, the outlet of the ejector is connected with the inlet of the jacket through a pipeline, and the outlet of the jacket is connected with the sewage treatment tank.
4. The waste incineration device for the co-combustion of sludge as set forth in claim 3, wherein the sewage treatment tank is connected with the landfill leachate through a pipeline.
5. A waste incineration device for co-firing sludge according to claim 1, characterized in that the sludge bin is connected with the sludge inlet of the vacuum dryer by means of a screw conveyor.
6. A waste incineration device for co-combusting sludge as claimed in claim 3, characterized in that the sludge outlet of the vacuum dryer is connected to the inlet of the waste incinerator by means of a second screw conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123157424.3U CN216693565U (en) | 2021-12-15 | 2021-12-15 | Waste incineration device for co-combustion of sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123157424.3U CN216693565U (en) | 2021-12-15 | 2021-12-15 | Waste incineration device for co-combustion of sludge |
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| Publication Number | Publication Date |
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| CN216693565U true CN216693565U (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123157424.3U Active CN216693565U (en) | 2021-12-15 | 2021-12-15 | Waste incineration device for co-combustion of sludge |
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| Country | Link |
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| CN (1) | CN216693565U (en) |
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2021
- 2021-12-15 CN CN202123157424.3U patent/CN216693565U/en active Active
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