CN218089316U - Device for drying sludge by using waste heat of thermal power plant - Google Patents
Device for drying sludge by using waste heat of thermal power plant Download PDFInfo
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- CN218089316U CN218089316U CN202222710376.4U CN202222710376U CN218089316U CN 218089316 U CN218089316 U CN 218089316U CN 202222710376 U CN202222710376 U CN 202222710376U CN 218089316 U CN218089316 U CN 218089316U
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Abstract
The utility model provides a thermal power plant waste heat drying mud device of make full use of thermal power plant waste heat and improvement heat transfer medium circulation cleanliness. A device for drying sludge by using waste heat of a thermal power plant comprises: the sludge drying unit comprises a drying chamber, the top of the drying chamber is provided with a hot air inlet, and the bottom of the drying chamber is provided with a cold air outlet; the system comprises an evaporation drying hot air unit, a hot water tank and a condenser, wherein the evaporation drying hot air unit comprises a primary heat exchanger, a hot water tank and the condenser; the cooling and drying hot air unit comprises a secondary heat exchanger; and the inlet of the circulating dehumidification unit is communicated with the cold air outlet through a pipeline, and the outlet of the circulating dehumidification unit is communicated with the inlet of the cold air reheating channel through a pipeline. The utility model discloses an adopt the waste heat of hierarchical heat transfer mode make full use of boiler flue gas, and make heat transfer medium move throughout in comparatively clear system, guarantee the work efficiency of sludge drying unit.
Description
Technical Field
The utility model relates to a dry mud device, concretely relates to waste heat dry mud device of steam power plant belongs to waste heat utilization technical field.
Background
The improvement of the comprehensive utilization degree of the waste heat of the thermal power plant is one of the beneficial measures for improving the economic benefit of the thermal power plant, and the drying of the sludge by the waste heat of the thermal power plant is one of the utilization methods. Directly use stove waste heat flue gas to carry out the drying to mud, efficiency is lower, and because the pressure of stove afterbody flue gas is lower, need increase extra flue gas supercharging equipment when utilizing it to carry out the mud drying, in addition, stove afterbody flue gas circulates with mud direct contact, and dusty flue gas can lead to the fact the corruption to circulation system, and long-term operation influences sludge drying machine's efficiency.
SUMMERY OF THE UTILITY MODEL
Based on above background, the utility model aims to provide a make full use of steam power plant waste heat just improves the dry mud device of steam power plant waste heat of heat transfer medium circulation cleanliness.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a device for drying sludge by using waste heat of a thermal power plant comprises:
the sludge drying unit comprises a drying chamber, and an evaporation drying conveyor, a cooling drying conveyor and a dry sludge conveyor which are sequentially arranged in the drying chamber from top to bottom, wherein a hot air inlet is formed in the top of the drying chamber, a cold air outlet is formed in the bottom of the drying chamber, an evaporation drying area is formed in the area between the top of the drying chamber and the evaporation drying conveyor, and a cooling drying area is formed in the area between the evaporation drying conveyor and the cooling drying conveyor;
the system comprises an evaporation drying hot air unit, a hot water tank and a condenser, wherein the evaporation drying hot air unit comprises a primary heat exchanger, a hot water tank and a condenser, a primary flue gas channel and a cold water heating channel are arranged in the primary heat exchanger, the condenser is provided with a hot water condensation channel and an air heating channel, an inlet of the cold water heating channel is communicated with an outlet of the hot water condensation channel through a pipeline, an outlet of the cold water heating channel is sequentially communicated with inlets of the hot water tank and the hot water condensation channel through a pipeline, and an outlet of the air heating channel is communicated with a hot air inlet;
the cooling and drying hot air unit comprises a secondary heat exchanger, a secondary flue gas channel and a cold air reheating channel are arranged in the secondary heat exchanger, an inlet of the secondary flue gas channel is communicated with an outlet of the primary flue gas channel through a pipeline, and an outlet of the cold air reheating channel is communicated with an inlet of the air heating channel and the cooling and drying area through pipelines respectively;
and the inlet of the circulating dehumidification unit is communicated with the cold air outlet through a pipeline, and the outlet of the circulating dehumidification unit is communicated with the inlet of the cold air reheating channel through a pipeline.
The boiler flue gas with high-temperature waste heat firstly heats a hydrophily through a primary heat exchanger, hot water and air exchange heat in a condenser and then return to the primary heat exchanger for reheating, the air is heated and then enters an evaporation drying area of a sludge drying unit as hot air to evaporate and dry sludge, the cooled hot air enters a cooling drying area to cool and dry the sludge, moist cold air is formed and discharged out of the sludge drying unit, condensable gas in the moist cold air is condensed into condensed water and then discharged, dry cold air for eliminating the condensable gas enters a secondary heat exchanger, the low-temperature flue gas after heat exchange of the primary heat exchanger heats the dry cold air through the secondary heat exchanger to reheat the cold air, a part of the reheated cold air enters the cooling drying area to continuously participate in cooling and drying the sludge, the other part of the reheated cold air enters the condenser to exchange heat and then forms hot air to continuously participate in evaporation and drying the sludge, the waste heat sludge drying device of the thermal power plant fully utilizes the waste heat of the boiler flue gas in a graded heat exchange mode, and enables a heat exchange medium to always run in a cleaner system, and the working efficiency of the sludge drying unit is guaranteed.
Preferably, a sludge forming machine is further arranged above the top of the drying chamber. The sludge forming machine is used for extruding sludge to form a specific shape so as to facilitate subsequent drying operation.
Preferably, the circulating dehumidification unit comprises a cooling water tower and an evaporator, a cooling water circulating channel, a cold air cooling channel and a condensate water recovery channel are arranged in the evaporator, an inlet and an outlet of the cooling water circulating channel are respectively communicated with the cooling water tower through pipelines, an inlet of the cold air cooling channel is communicated with a cold air outlet through a pipeline, and an outlet of the cold air cooling channel is communicated with an inlet of the cold air reheating channel through a pipeline.
Preferably, the circulating dehumidification unit further comprises a condensed water collection box, and an outlet of the condensed water recovery channel is communicated with the condensed water collection box through a pipeline.
Preferably, a first water pump is arranged on a pipeline between the cooling water tower and the inlet of the cooling water circulation channel.
Preferably, a second water pump is arranged on a pipeline between the cold water heating channel and the hot water tank.
Preferably, a circulating fan is arranged on a pipeline between the air heating channel and the hot air inlet.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses a thermal power plant waste heat drying mud device, through adopting the waste heat of hierarchical heat transfer mode make full use of boiler flue gas, and make heat transfer medium move in comparatively clear system all the time, guarantee the work efficiency of sludge drying unit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of the sludge drying device using waste heat of a thermal power plant.
In the figure: 1. a sludge drying unit; 2. an evaporation drying hot air unit; 3. a cooling and drying hot air unit; 4. a circulating dehumidification unit; 101. a drying chamber; 102. an evaporation drying conveyor; 103. a cooling drying conveyor; 104. a dry sludge conveyor; 105. an evaporation drying zone; 106. a cooling and drying area; 107. a sludge forming machine; 108. a hot air inlet; 109. a cold air outlet; 201. a primary heat exchanger; 202. a hot water tank; 203. a condenser; 204. a second water pump; 205. a circulating fan; 301. a secondary heat exchanger; 401. a cooling water tower; 402. an evaporator; 403. a condensed water collecting box; 404. a first water pump.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific embodiments and with reference to the accompanying drawings. It is to be understood that the practice of the present invention is not limited to the following examples, and that any modifications and/or changes in form made to the present invention are intended to fall within the scope of the present invention.
In the present invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used may be commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified. Unless otherwise indicated, the components or devices in the following examples are all common standard components or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through routine experimentation.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. However, one or more embodiments may be practiced without these specific details by one of ordinary skill in the art.
The device for drying sludge by using waste heat of a thermal power plant as shown in fig. 1 comprises a sludge drying unit 1, an evaporation drying hot air unit 2, a cooling drying hot air unit 3 and a circulating dehumidification unit 4.
The sludge drying unit 1 comprises a drying chamber 101, and an evaporation drying conveyor 102, a cooling drying conveyor 103 and a dry sludge conveyor 104 which are sequentially arranged in the drying chamber 101 from top to bottom, wherein a hot air inlet 108 is arranged at the top of the drying chamber 101, a cold air outlet 109 is arranged at the bottom of the drying chamber 101, an evaporation drying area 105 is formed in an area between the top of the drying chamber 101 and the evaporation drying conveyor 102, and a cooling drying area 106 is formed in an area between the evaporation drying conveyor 102 and the cooling drying conveyor 103. A sludge forming machine 107 is also arranged above the top of the drying chamber 101, and the sludge forming machine 107 is used for extruding sludge to form a specific shape so as to facilitate the subsequent drying operation.
The evaporation drying hot air unit 2 comprises a first-level heat exchanger 201, a hot water tank 202 and a condenser 203, a first-level flue gas channel and a cold water heating channel are arranged in the first-level heat exchanger 201, the condenser 203 is provided with a hot water condensation channel and an air heating channel, an inlet of the cold water heating channel is communicated with an outlet of the hot water condensation channel through a pipeline, an outlet of the cold water heating channel is communicated with inlets of the hot water tank 202 and the hot water condensation channel in sequence through a pipeline, and an outlet of the air heating channel is communicated with a hot air inlet 108. A circulating fan 205 is arranged on a pipeline between the air heating channel and the hot air inlet 108. A second water pump 204 is arranged on a pipeline between the cold water heating channel and the hot water tank 202.
The cooling and drying hot air unit 3 comprises a secondary heat exchanger 301, a secondary flue gas channel and a cold air reheating channel are arranged in the secondary heat exchanger 301, an inlet of the secondary flue gas channel is communicated with an outlet of the primary flue gas channel through a pipeline, and an outlet of the cold air reheating channel is communicated with an inlet of the air heating channel and the cooling and drying area 106 through pipelines respectively.
The import of circulation dehumidification unit 4 passes through pipeline intercommunication cold wind export 109, the import of pipeline intercommunication cold wind reheat passageway is passed through in the export of circulation dehumidification unit 4, specifically, circulation dehumidification unit 4 includes cooling tower 401 and evaporimeter 402, be equipped with cooling water circulation passageway in the evaporimeter 402, cold wind cooling passageway and comdenstion water recovery passageway, pipeline intercommunication cooling tower 401 is passed through respectively in cooling water circulation passageway's import and export, pipeline intercommunication cold wind export 109 is passed through in the import of cold wind cooling passageway, the import of pipeline intercommunication cold wind reheat passageway is passed through in the export of cold wind cooling passageway. The circulation dehumidification unit 4 further comprises a condensed water collection tank 403, and an outlet of the condensed water recovery channel is communicated with the condensed water collection tank 403 through a pipeline. Wherein, a first water pump 404 is arranged on the pipeline between the cooling water tower 401 and the inlet of the cooling water circulation channel.
The working process of the device for drying sludge by using waste heat of the thermal power plant comprises the following steps that boiler flue gas with high-temperature waste heat firstly heats a water medium through a primary heat exchanger 201, hot water and air exchange heat in a condenser 203 and then return to the primary heat exchanger 201 for reheating, the heated air serving as hot air enters an evaporation drying area 105 of a sludge drying unit 1 for evaporation drying of sludge, the cooled hot air enters a cooling drying area 106 for cooling and drying of sludge to form moist cold air, the moist cold air is discharged out of the sludge drying unit 1 and then enters an evaporator 402 for heat exchange cooling with cooling water, and condensable gas in the moist cold air is condensed into condensate water and then is discharged through a condensate water recovery channel; the drying cold air for eliminating condensable gas enters the secondary heat exchanger 301, the lower-temperature flue gas subjected to heat exchange by the primary heat exchanger 201 heats the drying cold air through the secondary heat exchanger 301 to reheat the cold air, then a part of the reheated cold air enters the cooling and drying area 106 to continuously participate in cooling and drying the sludge, and the other part of the reheated cold air enters the condenser 203 for heat exchange to form hot air to continuously participate in evaporation and drying of the sludge.
This thermal power plant waste heat drying mud device adopts the waste heat of hierarchical heat transfer mode make full use of boiler flue gas, and makes heat transfer medium move in comparatively clear system all the time, guarantees sludge drying unit 1's work efficiency.
The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (7)
1. The utility model provides a dry mud device of steam power plant waste heat which characterized in that: this thermal power plant waste heat drying mud device includes:
the sludge drying device comprises a sludge drying unit (1), wherein the sludge drying unit (1) comprises a drying chamber (101), and an evaporation drying conveyor (102), a cooling drying conveyor (103) and a dry sludge conveyor (104) which are sequentially arranged in the drying chamber (101) from top to bottom, a hot air inlet (108) is formed in the top of the drying chamber (101), a cold air outlet (109) is formed in the bottom of the drying chamber (101), an evaporation drying zone (105) is formed in a region between the top of the drying chamber (101) and the evaporation drying conveyor (102), and a cooling drying zone (106) is formed in a region between the evaporation drying conveyor (102) and the cooling drying conveyor (103);
the hot air drying unit (2) comprises a primary heat exchanger (201), a hot water tank (202) and a condenser (203), wherein a primary flue gas channel and a cold water heating channel are arranged in the primary heat exchanger (201), the condenser (203) is provided with a hot water condensing channel and an air heating channel, an inlet of the cold water heating channel is communicated with an outlet of the hot water condensing channel through a pipeline, an outlet of the cold water heating channel is sequentially communicated with inlets of the hot water tank (202) and the hot water condensing channel through a pipeline, and an outlet of the air heating channel is communicated with a hot air inlet (108);
the cooling and drying hot air unit (3) comprises a secondary heat exchanger (301), a secondary flue gas channel and a cold air reheating channel are arranged in the secondary heat exchanger (301), an inlet of the secondary flue gas channel is communicated with an outlet of the primary flue gas channel through a pipeline, and an outlet of the cold air reheating channel is respectively communicated with an inlet of an air heating channel and a cooling and drying area (106) through pipelines;
the circulation dehumidification unit (4), pipeline intercommunication cold wind export (109) are passed through in the import of circulation dehumidification unit (4), and pipeline intercommunication cold wind reheating channel's import is passed through in the export of circulation dehumidification unit (4).
2. The device for drying sludge by using waste heat of a thermal power plant as claimed in claim 1, wherein: and a sludge forming machine (107) is also arranged above the top of the drying chamber (101).
3. The device for drying sludge by using waste heat of a thermal power plant as claimed in claim 1, wherein: circulation dehumidification unit (4) are equipped with cooling water circulation passageway, cold wind cooling passageway and comdenstion water recovery passageway including cooling water tower (401) and evaporimeter (402) in evaporimeter (402), and pipeline intercommunication cooling water tower (401) are passed through respectively in cooling water circulation passageway's import and export, and pipeline intercommunication cold wind export (109) are passed through in the import of cold wind cooling passageway, and pipeline intercommunication cold wind reheating passageway's import is passed through in the export of cold wind cooling passageway.
4. The device for drying sludge by using waste heat of a thermal power plant as claimed in claim 3, wherein: the circulating dehumidification unit (4) further comprises a condensed water collection box (403), and an outlet of the condensed water recovery channel is communicated with the condensed water collection box (403) through a pipeline.
5. The device for drying sludge by using waste heat of a thermal power plant as claimed in claim 3, wherein: and a first water pump (404) is arranged on a pipeline between the cooling water tower (401) and the inlet of the cooling water circulation channel.
6. The device for drying sludge by using waste heat of a thermal power plant as claimed in claim 1, characterized in that: and a second water pump (204) is arranged on a pipeline between the cold water heating channel and the hot water tank (202).
7. The device for drying sludge by using waste heat of a thermal power plant as claimed in claim 1, wherein: and a circulating fan (205) is arranged on a pipeline between the air heating channel and the hot air inlet (108).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222710376.4U CN218089316U (en) | 2022-10-14 | 2022-10-14 | Device for drying sludge by using waste heat of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222710376.4U CN218089316U (en) | 2022-10-14 | 2022-10-14 | Device for drying sludge by using waste heat of thermal power plant |
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| CN218089316U true CN218089316U (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222710376.4U Active CN218089316U (en) | 2022-10-14 | 2022-10-14 | Device for drying sludge by using waste heat of thermal power plant |
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| CN (1) | CN218089316U (en) |
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