CN211345350U - Thermal desorption soil drying system for recycling waste heat of secondary combustion chamber - Google Patents
Thermal desorption soil drying system for recycling waste heat of secondary combustion chamber Download PDFInfo
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- CN211345350U CN211345350U CN201922084523.XU CN201922084523U CN211345350U CN 211345350 U CN211345350 U CN 211345350U CN 201922084523 U CN201922084523 U CN 201922084523U CN 211345350 U CN211345350 U CN 211345350U
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- 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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The utility model relates to the technical field of soil drying, in particular to a thermal desorption soil drying system for recycling waste heat of a secondary combustion chamber, which comprises a secondary combustion chamber, a water-gas heat exchanger, a temperature-adjusting heat exchanger, a circulating pump, a pre-drying module, a quench tower, a quench water tank and a quench circulating pump, wherein the water-gas heat exchanger is arranged in the secondary combustion chamber, the inlet end and the outlet end of the water-gas heat exchanger are positioned outside the secondary combustion chamber, the circulating pump is communicated between the main outlet end of the temperature-adjusting heat exchanger and the inlet end of the water-gas heat exchanger, the water outlet end of the pre-drying module is communicated with the main inlet end of the temperature-adjusting heat exchanger, the water inlet end of the pre-drying module is communicated with the outlet end of the water-gas heat exchanger, the air inlet end of the quench tower is communicated with the flue gas outlet of the secondary combustion chamber, and the, further reducing the energy consumption of the soil during thermal desorption.
Description
Technical Field
The utility model relates to a soil drying system technical field, specific field is a thermal desorption soil drying system of two combustion chambers waste heat retrieval and utilization.
Background
The soil thermal desorption technology is a promising soil restoration technology, and is a process of heating soil polluted by organic matters to a certain temperature, selectively promoting the pollutants to be gasified and volatilized by controlling the system temperature and the material retention time, separating the pollutants from soil particles and carrying out subsequent treatment.
At present, in order to achieve the purpose of preventing secondary pollution, thermal desorption tail gas is generally introduced into a secondary combustion chamber and is sent into a quench tower after being burnt out. However, the temperature of the flue gas in the secondary chamber is about 800-1000 ℃, and the flue gas is directly introduced into the quenching tower to be quenched to 200 ℃, so that toxic substances such as dioxin and the like are generated, and huge energy waste is also caused.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a thermal desorption soil drying system of two combustion chambers waste heat retrieval and utilization to the problem of the waste of leading to the fact that noxious material and later stage energy utilization rate are not enough appears in the two combustion chambers treatment process among the solution prior art.
In order to achieve the above object, the utility model provides a following technical scheme: a thermal desorption soil drying system for recycling waste heat of a secondary combustion chamber comprises the secondary combustion chamber, a water-gas heat exchanger, a temperature-adjusting heat exchanger, a circulating pump, a pre-drying module, a quench tower, a quench water tank and a quench circulating pump,
the water-gas heat exchanger is arranged in the second combustion chamber, the inlet end and the outlet end of the water-gas heat exchanger are positioned outside the second combustion chamber,
the main outlet end of the temperature-adjusting heat exchanger is communicated with the inlet end of the water-gas heat exchanger, the circulating pump is communicated between the main outlet end of the temperature-adjusting heat exchanger and the inlet end of the water-gas heat exchanger,
the pre-drying module is used for carrying out waste heat thermal desorption pre-drying on soil, the outlet end on the pre-drying module is communicated with the main inlet end of the temperature-adjusting heat exchanger, the inlet end on the pre-drying module is communicated with the outlet end of the water-gas heat exchanger,
the gas inlet end of the quenching tower is communicated with the flue gas outlet of the second combustion chamber,
the outlet of the quenching water tank is communicated to the quenching tower, the quenching water circulation inlet and outlet on the quenching water tank are communicated with the quenching water inlet and outlet of the temperature-adjusting heat exchanger, and the quenching circulation pump is communicated on the connecting pipeline of the quenching water tank and the temperature-adjusting heat exchanger.
Preferably, the predrying module comprises a disc dryer and a finned tube condenser, a gas phase outlet of the disc dryer is communicated with an inlet end of the finned tube condenser, a water outlet of the disc dryer is communicated with a main inlet end of the temperature-adjusting heat exchanger, and a water inlet of the disc heat exchanger is communicated with an outlet end of the water-gas heat exchanger.
Preferably, the outlet end of the pre-drying module is communicated with a water outlet valve, the other end of the water outlet valve is communicated with the main inlet end of the temperature-regulating heat exchanger,
the inlet end of the pre-drying module is communicated with a water inlet valve, and the outlet end of the water-gas heat exchanger at the other end of the water inlet valve is communicated.
Preferably, a fault valve is communicated in series between one ends, far away from the pre-drying module, of the water outlet valve and the water inlet valve.
Preferably, the main inlet end of the temperature-adjusting heat exchanger is communicated with a supplementary water tank and a supplementary pump, the water outlet of the supplementary water tank is communicated with the water inlet of the supplementary pump, and the water outlet of the supplementary pump is communicated with the main inlet end of the temperature-adjusting heat exchanger.
Preferably, the water outlet valve, the water inlet valve and the fault valve are butterfly valves.
Compared with the prior art, the beneficial effects of the utility model are that: the waste heat of the secondary combustion chamber is recycled to the soil pre-drying equipment, so that not only is the flue gas energy of the secondary combustion chamber fully utilized, but also the humidity of the soil to be repaired can be further reduced, and the energy consumption during thermal desorption of the soil is further reduced;
according to the invention, the water-gas heat exchanger absorbs the waste heat of the secondary combustion chamber, and energy is transmitted to the disc type dryer of the pre-drying module through the water inlet pipeline, so that the humidity of the pre-dried soil is reduced, and the energy consumption during thermal desorption is further reduced;
the water-gas heat exchanger and the temperature-adjusting heat exchanger are arranged in a coil pipe, so that the heat exchange efficiency is improved;
the temperature-adjusting heat exchanger is arranged at the front end of the water inlet of the water-gas heat exchanger, so that the temperature of circulating water in the water-gas heat exchanger can be effectively controlled;
through the arrangement of the water inlet valve, the water outlet valve and the fault valve, when the disc dryer breaks down, the water inlet valve and the water outlet valve can be closed, and the fault valve is opened, so that water flowing out of the water-gas heat exchanger is avoided from a fault area, the disc dryer is prevented from being seriously broken down, and the maintenance and the replacement of equipment are facilitated;
the water replenishing tank is used for replenishing lost water for the system through a replenishing pump, so that the water loss in a water circulation pipeline is prevented, and the equipment is prevented from being damaged by dry burning;
the rapid cooling water tank provides rapid cooling water for the system through a rapid cooling water circulating pump, prevents that aqueous vapor heat exchanger and thermoregulation heat exchanger pipeline from burning out, improve equipment life to further reduce flue gas temperature.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention;
in the figure: 1. a pre-drying module; 101. a finned tube condenser; 1011. a condenser condensate outlet; 1012. a condenser gas outlet; 102. a tray dryer; 1021. a soil inlet; 1022. a soil outlet; 2. a water outlet valve; 3. a water inlet valve; 4. a failed valve; 5. a make-up pump; 6. a supplementary water tank; 7. a quench tower; 701. an outlet of the quench tower; 8. a chilled water tank; 801. a quench water replenishment port; 9. a quench circulating pump; 10. a temperature-regulating heat exchanger; 11. a circulation pump; 12. a water-gas heat exchanger; 13. a second combustion chamber; 1301. and an inlet of a second combustion chamber.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all the gas embodiments obtained by the ordinary skilled in the art without creative work all belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a thermal desorption soil drying system for recycling waste heat of a secondary combustion chamber comprises a secondary combustion chamber 13, a water-gas heat exchanger 12, a temperature adjusting heat exchanger 10, a circulating pump 11, a pre-drying module 1, a quench tower 7, a quench water tank 8 and a quench circulating pump 9,
the water-gas heat exchanger 12 is installed in the second combustion chamber 13, and the inlet end and the outlet end of the water-gas heat exchanger 12 are located outside the second combustion chamber 13,
the main outlet end of the temperature-adjusting heat exchanger 10 is communicated with the inlet end of the water-gas heat exchanger 12, the circulating pump 11 is communicated between the main outlet end of the temperature-adjusting heat exchanger 10 and the inlet end of the water-gas heat exchanger 12,
the pre-drying module 1 is used for carrying out waste heat thermal desorption pre-drying on soil, the outlet end of the pre-drying module 1 is communicated with the main inlet end of the temperature adjusting heat exchanger 10, the inlet end of the pre-drying module 1 is communicated with the outlet end of the water-gas heat exchanger 12,
the gas inlet end of the quenching tower 7 is communicated with the flue gas outlet of the second combustion chamber 13,
the outlet water spray port of the rapid cooling water tank 8 is communicated into the rapid cooling tower 7, the rapid cooling water circulation inlet and outlet on the rapid cooling water tank 8 are communicated with the rapid cooling water inlet and outlet of the temperature-adjusting heat exchanger 10, and the rapid cooling circulation pump 9 is communicated on the connecting pipeline of the rapid cooling water tank 8 and the temperature-adjusting heat exchanger 10.
The quenching water tank 8 is further provided with a quenching water supply port 801, and when the capacity of quenching water in the quenching water tank 8 is small, quenching water is filled into the quenching water tank 8 through the quenching water supply port 801.
The pipelines in the water-gas heat exchanger 12 and the temperature-adjusting heat exchanger 10 are both arranged in a snake-shaped disc manner, so that the heat exchange efficiency of water in the pipelines, the water-gas heat exchanger 12 and the temperature-adjusting heat exchanger 10 is improved in the water circulation process in the pipelines.
The predrying module 1 comprises a disc type dryer 102 and a finned tube condenser 101, wherein a gas phase outlet of the disc type dryer 102 is communicated with an inlet end of the finned tube condenser 101, a water outlet of the disc type dryer 102 is communicated with a main inlet end of the temperature-adjusting heat exchanger 10, and a water inlet of the disc type heat exchanger is communicated with an outlet end of the water-gas heat exchanger 12.
The outlet end of the pre-drying module 1 is communicated with a water outlet valve 2, the other end of the water outlet valve 2 is communicated with the main inlet end of the temperature-regulating heat exchanger 10,
the inlet end of the pre-drying module 1 is communicated with a water inlet valve 3, and the outlet end of a water-gas heat exchanger 12 at the other end of the water inlet valve 3 is communicated.
And a faulty valve 4 is connected and communicated in series between one ends of the water outlet valve 2 and the water inlet valve 3, which are far away from the pre-drying module 1.
The main inlet end of the temperature-adjusting heat exchanger 10 is communicated with a supplementary water tank 6 and a supplementary pump 5, the water outlet of the supplementary water tank 6 is communicated with the water inlet of the supplementary pump 5, and the water outlet of the supplementary pump 5 is communicated with the main inlet end of the temperature-adjusting heat exchanger 10.
The water outlet valve 2, the water inlet valve 3 and the fault valve 4 are all butterfly valves.
The finned tube condenser 101, the disc type drier 102, the temperature-adjusting heat exchanger 10 and the water-gas heat exchanger 12 are all composed of a tube bundle heat exchanger structure.
Through the technical scheme, the invention also provides a use method of the thermal desorption soil drying system for recycling the waste heat of the secondary combustion chamber 13, which comprises the following steps:
(1) after the pipeline of the drying system is filled with water, the water inlet valve 3 and the water outlet valve 2 are opened, and then the fault valve 4 is closed;
(2) introducing soil thermal desorption tail gas into an inlet of the secondary combustion chamber 13, and then igniting the secondary combustion chamber 13;
(3) the tail gas is fully combusted in the secondary combustion chamber 13, and heat generated in the combustion process is transferred to the water-gas heat exchanger 12;
(4) after being heated, water in the water-gas heat exchanger 12 is conveyed into the disc dryer 102 through a circulating pump 11 on a pipeline to heat the disc dryer 102;
(5) the soil inlet of the disc dryer 102 is filled with soil to be pre-dried, and the soil is pre-dried by the heat of hot water;
(6) then discharging the pre-dried soil to thermal desorption equipment from a soil outlet of the disc dryer 102;
(7) tail gas generated in the process of pre-drying soil by the disc type dryer 102 is introduced into the finned tube condenser 101;
(8) the finned tube condenser 101 absorbs the tail gas from the disc dryer 102 and condenses the tail gas, condensed water is sent to the water treatment unit from a condensed water outlet of the finned tube condenser 101, and the rest gas is sent to the secondary combustion chamber 13 from a gas outlet of the finned tube condenser 101;
(9) introducing the gas combusted in the secondary combustion chamber 13 into a quenching tower 7, condensing the gas by the quenching tower 7, and sending the rest gas into a tail gas treatment unit from the outlet end of the quenching tower 7;
(10) in the gas treatment process after the combustion of the quenching tower, quenching water in the quenching water tank is sprayed into the quenching tower to quench the flue gas, so that the generation of dioxin is prevented.
After the amount of water in the pipe decreases during the operation of the circulation pump 11, the water in the replenishing water tank 6 is replenished into the water circulation pipe of the circulation pump 11 by turning on the replenishing pump 5.
In the operation process of the circulating pump 11, the quenching circulating pump 9 is opened, so that the pipeline communicated between the temperature adjusting heat exchanger 10 and the quenching water tank 8 is subjected to quenching water circulation, and the hot water circulation pipeline in the temperature adjusting heat exchanger 10 is cooled and temperature regulated by quenching water, so that the water outlet temperature of the water outlet of the water-gas heat exchanger 12 is regulated.
When the disc dryer 102 or the finned tube condenser 101 fails and pre-drying cannot be performed, the water inlet valve 3 and the water outlet valve 2 are closed, and the failure valve 4 is opened, so that the circulating water in the circulating pump 11 only circulates between the water-gas heat exchanger 12 and the temperature-adjusting heat exchanger 10.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a thermal desorption soil drying system of second combustion chamber waste heat retrieval and utilization which characterized in that: comprises a secondary combustion chamber, a water-gas heat exchanger, a temperature-adjusting heat exchanger, a circulating pump, a pre-drying module, a quench tower, a quench water tank and a quench circulating pump,
the water-gas heat exchanger is arranged in the second combustion chamber, the inlet end and the outlet end of the water-gas heat exchanger are positioned outside the second combustion chamber,
the main outlet end of the temperature-adjusting heat exchanger is communicated with the inlet end of the water-gas heat exchanger, the circulating pump is communicated between the main outlet end of the temperature-adjusting heat exchanger and the inlet end of the water-gas heat exchanger,
the pre-drying module is used for carrying out waste heat thermal desorption pre-drying on soil, the outlet end on the pre-drying module is communicated with the main inlet end of the temperature-adjusting heat exchanger, the inlet end on the pre-drying module is communicated with the outlet end of the water-gas heat exchanger,
the gas inlet end of the quenching tower is communicated with the flue gas outlet of the second combustion chamber,
the outlet of the quenching water tank is communicated to the quenching tower, the quenching water circulation inlet and outlet on the quenching water tank are communicated with the quenching water inlet and outlet of the temperature-adjusting heat exchanger, and the quenching circulation pump is communicated on the connecting pipeline of the quenching water tank and the temperature-adjusting heat exchanger.
2. The thermal desorption soil drying system for recycling waste heat of the secondary combustion chamber as claimed in claim 1, which is characterized in that: the predrying module comprises a disc type dryer and a fin tube condenser, a gas phase outlet of the disc type dryer is communicated with an inlet end of the fin tube condenser, a water outlet of the disc type dryer is communicated with a main inlet end of the temperature-adjusting heat exchanger, and a water inlet of the disc type heat exchanger is communicated with an outlet end of the water-gas heat exchanger.
3. The thermal desorption soil drying system for recycling waste heat of the secondary combustion chamber as claimed in claim 1, which is characterized in that: the outlet end of the pre-drying module is communicated with a water outlet valve, the other end of the water outlet valve is communicated with the main inlet end of the temperature-adjusting heat exchanger,
the inlet end of the pre-drying module is communicated with a water inlet valve, and the outlet end of the water-gas heat exchanger at the other end of the water inlet valve is communicated.
4. The thermal desorption soil drying system for recycling waste heat of the secondary combustion chamber as claimed in claim 3, which is characterized in that: and a fault valve is communicated in series between one ends of the water outlet valve and the water inlet valve, which are far away from the pre-drying module.
5. The thermal desorption soil drying system for recycling waste heat of the secondary combustion chamber as claimed in claim 1, which is characterized in that: the main inlet end of the temperature-adjusting heat exchanger is communicated with a supplementary water tank and a supplementary pump, the water outlet of the supplementary water tank is communicated with the water inlet of the supplementary pump, and the water outlet of the supplementary pump is communicated with the main inlet end of the temperature-adjusting heat exchanger.
6. The thermal desorption soil drying system for recycling waste heat of the secondary combustion chamber as claimed in claim 4, wherein: the water outlet valve, the water inlet valve and the fault valve are all butterfly valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922084523.XU CN211345350U (en) | 2019-11-27 | 2019-11-27 | Thermal desorption soil drying system for recycling waste heat of secondary combustion chamber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922084523.XU CN211345350U (en) | 2019-11-27 | 2019-11-27 | Thermal desorption soil drying system for recycling waste heat of secondary combustion chamber |
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| CN211345350U true CN211345350U (en) | 2020-08-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848715A (en) * | 2019-11-27 | 2020-02-28 | 中国计量大学 | Thermal desorption soil drying system for recycling waste heat of secondary combustion chamber and using method |
| CN114508902A (en) * | 2022-01-27 | 2022-05-17 | 中国计量大学 | Storage type soil drying system for recycling waste heat of secondary combustion chamber and control method |
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2019
- 2019-11-27 CN CN201922084523.XU patent/CN211345350U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110848715A (en) * | 2019-11-27 | 2020-02-28 | 中国计量大学 | Thermal desorption soil drying system for recycling waste heat of secondary combustion chamber and using method |
| CN114508902A (en) * | 2022-01-27 | 2022-05-17 | 中国计量大学 | Storage type soil drying system for recycling waste heat of secondary combustion chamber and control method |
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