CN111875220A - Closed geothermal energy sludge drying device and use method thereof - Google Patents
Closed geothermal energy sludge drying device and use method thereof Download PDFInfo
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- CN111875220A CN111875220A CN202010639902.5A CN202010639902A CN111875220A CN 111875220 A CN111875220 A CN 111875220A CN 202010639902 A CN202010639902 A CN 202010639902A CN 111875220 A CN111875220 A CN 111875220A
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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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Abstract
The invention discloses a closed geothermal energy sludge drying device and a use method thereof, belonging to the field of sludge treatment. The device comprises: the dryer comprises a dryer outer cylinder, a dryer inner cylinder, a spray pipe, a gas-solid separator, a gas collecting pipe, a condenser, a dust remover, a draught fan, an air compressor, a plate-fin heat exchanger, an expansion valve, a heat exchanger and a compressor. The invention adopts a spraying mode to carry out heat exchange between the hot air and the sludge, utilizes geothermal energy to heat the air, and uses the hot air to heat the sludge, thereby removing the moisture in the sludge and reducing the energy consumption.
Description
Technical Field
The invention relates to a closed geothermal energy sludge drying device and a use method thereof, belonging to the field of sludge treatment.
Background
With the increase of the sludge yield, the treatment and disposal of the sludge attract attention of all social circles, the sludge treatment is a reduction, stabilization and harmless processing process of concentrating, tempering, dehydrating, stabilizing, drying or incinerating the sludge, and the like, and the reduction, stabilization and harmless treatment of the sludge can be realized. Before sludge incineration power generation, in order to save incineration energy, sludge needs to be dried, so that the liquid content in municipal sludge, domestic sludge, industrial sludge and the like is reduced. Therefore, the dehydration and drying of the sludge are the premise and key of the sludge treatment technology. The existing sludge drying device has poor closure, odor comes out after being heated, and a large amount of electric energy is required to be consumed during heating, so that the problems of high energy consumption and serious odor pollution exist.
Disclosure of Invention
[ problem ] to
Solves the problems of high energy consumption and serious odor pollution of the prior sludge drying device.
[ solution ]
The invention provides a closed geothermal energy sludge drying device, which comprises: the dryer comprises a dryer outer cylinder, a dryer inner cylinder, a spray pipe, a gas-solid separator, a gas collecting pipe, a condenser, a dust remover, a draught fan, an air compressor, a plate-fin heat exchanger, an expansion valve, a heat exchanger and a compressor; the dryer inner cylinder is arranged in the dryer outer cylinder, a gas-solid separator is arranged at the top of the dryer inner cylinder, the gas-solid separator is in an inverted funnel shape, and the gas-solid separator comprises: the gas collecting pipe and the conical funnel are arranged at the top of the gas collecting pipe; the spray pipe is arranged at the bottom of the dryer inner cylinder, and the bottom of the dryer outer cylinder is provided with a dried sludge outlet; the dryer inner cylinder is divided into an introducing chamber, a mixing chamber and a diffusion pipe from bottom to top, and a wet sludge inlet is formed in one side of the introducing chamber; a gap is reserved between the conical funnel part of the gas-solid separator and the top of the diffusion pipe; the gas collecting pipe is connected with the plate-fin heat exchanger sequentially through the condenser, the dust remover and the induced draft fan; the bottom inlet of the spray pipe is connected with the plate-fin heat exchanger through an air compressor; the plate-fin heat exchanger, the expansion valve, the heat exchanger and the compressor are connected in sequence.
In one embodiment of the invention, the cross sections of the dryer inner cylinder and the dryer outer cylinder are both circular and concentric.
In one embodiment of the invention, the gap is between 80 and 120 mm.
In one embodiment of the invention, the conical funnel has a cone angle in the range of 45-60 °.
In one embodiment of the present invention, the nozzle is a laval nozzle, the upper half of the nozzle is narrowed from small to middle to a narrow throat, and the narrow throat is then flared from small to large to the bottom.
In one embodiment of the invention, the cross section of the dryer inner cylinder from bottom to top is gradually increased from large to small.
In one embodiment of the invention, the height of the lance is equal to the height of the introduction chamber.
In one embodiment of the invention, the heat exchanger is embedded in soil, and a working medium is arranged inside the heat exchanger, wherein the working medium is freon.
The invention provides a use method of a closed geothermal energy sludge drying device, which comprises the following steps:
the method comprises the following steps: wet sludge is introduced into the introducing chamber from a wet sludge inlet, simultaneously hot air is introduced into the spray pipe, the hot air is sprayed out from the spray pipe at a high speed through the expansion of the spray pipe to absorb the wet sludge injected around, so that the hot air and the wet sludge are mixed in the mixing chamber, the heat energy in the hot air is transferred to the sludge, the moisture in the wet sludge is evaporated to form dried sludge, the dried sludge and the water vapor rise to the gas-solid separator through the diffusion pipe under the action of the induced draft fan, and the water vapor and the air are discharged through the gas collecting pipe; the dried sludge falls to the bottom of the outer cylinder of the dryer through the gap and is discharged through a dried sludge outlet;
step two: the vapor and air exhausted by the gas collecting pipe pass through the condenser under the action of the induced draft fan, the vapor is condensed in the condenser and then exhausted, the air enters the dust remover, and dust contained in the air is removed through the dust remover;
step three: and (3) the air after dust removal enters a plate-fin heat exchanger, heat exchange is carried out on the air and the hot working medium to increase the temperature of the air to form hot air, and then the hot air is sent into an inlet spray pipe through an air compressor, so that the first step and the second step are repeated.
In an embodiment of the invention, in the third step, the heat exchanger absorbs heat in soil, the working medium is changed into gas, the gas is compressed by the compressor to be changed into high-temperature high-pressure gas working medium, the high-temperature high-pressure gas working medium is condensed and released heat after entering the plate-fin heat exchanger to form liquid working medium, meanwhile, the emitted liquefaction heat heats the air in the third step, and the condensed liquid working medium flows back to the heat exchanger through the expansion valve to absorb heat energy of soil for gasification again.
[ advantageous effects ]
1. The geothermal energy is used for heating air, the hot air is used for heating sludge, the moisture in the sludge is removed, the energy consumption of sludge drying is greatly reduced, the sludge with the same quality is treated, and compared with the existing electric energy heating device, the electric energy consumption of 1/3-2/3 can be saved.
2. The hot air and the sludge are subjected to heat exchange in an injection mode, the injected sludge around the vacuum entrainment formed by air injection is pushed by high-pressure air, the sludge is mixed in a fluidized state, the air and the sludge are mixed without other mechanical energy, and the energy consumption is further reduced.
3. The gas-solid separator realizes the recycling of air without discharging air, and greatly reduces the formation of odor.
Drawings
Fig. 1 is a closed geothermal energy sludge drying apparatus of example 1.
In the figure: 1. an outer dryer cylinder; 2. a nozzle; 3. an inner cylinder of the dryer; 3-1, an introduction chamber; 3-2, a mixing chamber; 3-3, a diffusion tube; 4. a gas-solid separator; 5. a gas collecting pipe; 6. a gap; 7. a wet sludge inlet; 8. a dry sludge outlet; 9. a condenser; 10. a dust remover; 11. an induced draft fan; 12. an air compressor; 13. a plate-fin heat exchanger; 14. an expansion valve; 15. a heat exchanger; 16. a compressor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1, the present embodiment provides a closed geothermal energy sludge drying device, including: the device comprises a dryer outer cylinder 1, a dryer inner cylinder, a spray pipe 2, a gas-solid separator 4, a gas collecting pipe 5, a condenser 9, a dust remover 10, an induced draft fan 11, an air compressor 12, a plate-fin heat exchanger 13, an expansion valve 14, a heat exchanger 15 and a compressor 16.
The dryer inner cylinder 3 is arranged in the dryer outer cylinder 1, and the cross sections of the dryer inner cylinder 3 and the dryer outer cylinder 1 are respectively circular and concentric; the top of the dryer inner cylinder 3 is provided with a gas-solid separator 4, the gas-solid separator 4 is in an inverted funnel shape, and the gas-solid separator 4 comprises: the gas collecting pipe 5 and the conical funnel are arranged at the top of the gas collecting pipe; the spray pipe 2 is arranged at the bottom of the dryer inner cylinder 3, and the bottom of the dryer outer cylinder 1 is provided with a dried sludge outlet 8; the dryer inner cylinder 3 is divided into an introducing chamber 3-1, a mixing chamber 3-2 and a diffusion pipe 3-3 from bottom to top, and a wet sludge inlet 7 is formed in one side of the introducing chamber 3-1; a gap 6 is reserved between the conical funnel part of the gas-solid separator 4 and the top of the diffusion pipe 3-3; the gap 6 is 80-120 mm; the conical funnel has a cone angle in the range of 45-60 deg.
The gas collecting pipe 5 is connected with the plate-fin heat exchanger 13 through the condenser 9, the dust remover 10 and the induced draft fan 11 in sequence; the bottom inlet of the spray pipe 2 is connected with a plate-fin heat exchanger 13 through an air compressor 12; the plate-fin heat exchanger 13, the expansion valve 14, the heat exchanger 15 and the compressor 16 are connected in sequence.
Furthermore, the nozzle 2 is a laval nozzle, the upper half part of the nozzle 2 is contracted from big to small to the middle to a narrow throat, and the narrow throat is expanded from small to big to the bottom.
Further, the cross section of the dryer inner cylinder 3 from bottom to top is changed from big to small and then big.
Further, the height of the nozzle 2 is equal to the height of the introduction chamber 3-1.
Further, the heat exchanger 15 is buried in soil, and a working medium is arranged inside the heat exchanger, wherein the working medium is Freon.
Example 2
The embodiment provides a use method of a closed geothermal energy sludge drying device, which comprises the following steps:
the method comprises the following steps: wet sludge is introduced into the introducing chamber 3-1 from a wet sludge inlet, meanwhile, hot air is introduced into the spray pipe 2, the hot air is sprayed out from the spray pipe 2 at a high speed through the expansion of the spray pipe 2 to suck the injected wet sludge around, so that the hot air and the wet sludge are mixed in the mixing chamber 3-2, the heat energy in the hot air is transferred to the sludge, the moisture in the wet sludge is evaporated to form dried sludge, the dried sludge and the water vapor rise to the gas-solid separator 4 through the diffusion pipe 3-3 under the action of the induced draft fan 11, and the water vapor and the air are discharged through the gas collecting pipe 5; the dried sludge falls to the bottom of the outer cylinder 1 of the dryer through the gap 6 and is discharged through a dried sludge outlet 8.
Step two: the vapor and air exhausted from the gas collecting pipe 5 pass through the condenser 9 under the action of the induced draft fan 11, the vapor is condensed in the condenser 9 and then exhausted, the air enters the dust remover 10, and dust contained in the air is removed through the dust remover 10.
Step three: the air after dust removal enters a plate-fin heat exchanger 13, heat exchange is carried out with hot working medium to raise the temperature of the air to form hot air, and then the hot air is sent into the spray pipe 2 through an air compressor 12, so that the first step and the second step are repeated.
The heat exchanger 15 absorbs heat in soil, the working medium is changed into gas, the gas is compressed by the compressor 16 to be changed into high-temperature high-pressure gas working medium, the high-temperature high-pressure gas working medium is condensed and released heat after entering the plate-fin heat exchanger 11 to form liquid working medium, meanwhile, the emitted liquefaction heat heats the air in the third step, the condensed liquid working medium flows back to the heat exchanger 15 through the expansion valve 13, and the heat energy of the soil is absorbed again for gasification.
The scope of the present invention is not limited to the above embodiments, and any modifications, equivalent substitutions, improvements, etc. that can be made by those skilled in the art within the spirit and principle of the inventive concept should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a closed geothermal energy sludge drying device which characterized in that includes: the dryer comprises a dryer outer cylinder, a dryer inner cylinder, a spray pipe, a gas-solid separator, a gas collecting pipe, a condenser, a dust remover, a draught fan, an air compressor, a plate-fin heat exchanger, an expansion valve, a heat exchanger and a compressor;
the dryer inner cylinder is arranged in the dryer outer cylinder, a gas-solid separator is arranged at the top of the dryer inner cylinder, the gas-solid separator is in an inverted funnel shape, and the gas-solid separator comprises: the gas collecting pipe and the conical funnel are arranged at the top of the gas collecting pipe; the spray pipe is arranged at the bottom of the dryer inner cylinder, and the bottom of the dryer outer cylinder is provided with a dried sludge outlet; the dryer inner cylinder is divided into an introducing chamber, a mixing chamber and a diffusion pipe from bottom to top, and a wet sludge inlet is formed in one side of the introducing chamber; a gap is reserved between the conical funnel part of the gas-solid separator and the top of the diffusion pipe;
the gas collecting pipe is connected with the plate-fin heat exchanger sequentially through the condenser, the dust remover and the induced draft fan; the bottom inlet of the spray pipe is connected with the plate-fin heat exchanger through an air compressor; the plate-fin heat exchanger, the expansion valve, the heat exchanger and the compressor are connected in sequence.
2. The enclosed geothermal energy sludge drying device of claim 1, wherein the cross sections of the inner dryer cylinder and the outer dryer cylinder are circular and concentric.
3. The enclosed geothermal energy sludge drying device of claim 2, wherein the gap is 80-120 mm.
4. The enclosed geothermal energy sludge drying apparatus of claim 3, wherein the conical funnel has a cone angle in the range of 45-60 °.
5. The enclosed geothermal energy sludge drying device of claim 4, wherein the nozzle is a Laval nozzle, the upper half of the nozzle is contracted from big to small to a narrow throat, and the narrow throat is expanded from small to big to bottom.
6. The enclosed geothermal energy sludge drying device of claim 5, wherein the cross section of the dryer inner cylinder from bottom to top is gradually reduced and then increased.
7. The enclosed geothermal energy sludge drying apparatus of claim 6 wherein the height of the lance is equal to the height of the inlet chamber.
8. The enclosed geothermal energy sludge drying device of claim 7, wherein the heat exchanger is embedded in soil, and a working medium is arranged inside the heat exchanger, and the working medium is freon.
9. A method of using the enclosed geothermal energy sludge drying apparatus of any one of claims 1 to 8, comprising:
the method comprises the following steps: wet sludge is introduced into the introducing chamber from a wet sludge inlet, simultaneously hot air is introduced into the spray pipe, the hot air is sprayed out from the spray pipe at a high speed through the expansion of the spray pipe to absorb the wet sludge injected around, so that the hot air and the wet sludge are mixed in the mixing chamber, the heat energy in the hot air is transferred to the sludge, the moisture in the wet sludge is evaporated to form dried sludge, the dried sludge and the water vapor rise to the gas-solid separator through the diffusion pipe under the action of the induced draft fan, and the water vapor and the air are discharged through the gas collecting pipe; the dried sludge falls to the bottom of the outer cylinder of the dryer through the gap and is discharged through a dried sludge outlet;
step two: the vapor and air exhausted by the gas collecting pipe pass through the condenser under the action of the induced draft fan, the vapor is condensed in the condenser and then exhausted, the air enters the dust remover, and dust contained in the air is removed through the dust remover;
step three: and (3) the air after dust removal enters a plate-fin heat exchanger, heat exchange is carried out between the air and a hot working medium to raise the temperature of the air to form hot air, then the hot air is sent into an inlet spray pipe through an air compressor, and the first step and the second step are repeated.
10. The method according to claim 9, wherein in step three, the heat exchanger absorbs heat in soil, the working medium is changed into gas, the gas is compressed by the compressor to be changed into high-temperature and high-pressure gas working medium, the high-temperature and high-pressure gas working medium is condensed and releases heat to form liquid working medium after entering the plate-fin heat exchanger, meanwhile, the air in step three is heated by the emitted liquefaction heat, and the condensed liquid working medium flows back to the heat exchanger through the expansion valve to absorb heat energy of soil for gasification again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010639902.5A CN111875220A (en) | 2020-07-06 | 2020-07-06 | Closed geothermal energy sludge drying device and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010639902.5A CN111875220A (en) | 2020-07-06 | 2020-07-06 | Closed geothermal energy sludge drying device and use method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022126506A1 (en) * | 2020-12-15 | 2022-06-23 | 南京锦泥资源环境有限公司 | System for drying sludge by using shallow strata geothermal energy |
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| CN103601355A (en) * | 2013-12-02 | 2014-02-26 | 成都绿源新创环保科技有限公司 | Spiral sludge drier |
| KR101590408B1 (en) * | 2015-07-31 | 2016-02-01 | 주식회사 우리종합기술 | Small-scale sewage and wastewater treatment system |
| CN105621849A (en) * | 2016-01-21 | 2016-06-01 | 江苏兆盛环保股份有限公司 | Air shockwave crushing sludge drying device and sludge shockwave drying system |
| CN110127984A (en) * | 2019-05-06 | 2019-08-16 | 四川天润德环境工程有限公司 | A kind of sludge at low temperature heat pump drying equipment |
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2020
- 2020-07-06 CN CN202010639902.5A patent/CN111875220A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103601355A (en) * | 2013-12-02 | 2014-02-26 | 成都绿源新创环保科技有限公司 | Spiral sludge drier |
| KR101590408B1 (en) * | 2015-07-31 | 2016-02-01 | 주식회사 우리종합기술 | Small-scale sewage and wastewater treatment system |
| CN105621849A (en) * | 2016-01-21 | 2016-06-01 | 江苏兆盛环保股份有限公司 | Air shockwave crushing sludge drying device and sludge shockwave drying system |
| CN110127984A (en) * | 2019-05-06 | 2019-08-16 | 四川天润德环境工程有限公司 | A kind of sludge at low temperature heat pump drying equipment |
Non-Patent Citations (2)
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| 刘载文等: "《污水处理过程优化控制系统》", 30 April 2014, 中国轻工业出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022126506A1 (en) * | 2020-12-15 | 2022-06-23 | 南京锦泥资源环境有限公司 | System for drying sludge by using shallow strata geothermal energy |
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Application publication date: 20201103 |