CN113566552A - Heat recovery drying airflow duct structure - Google Patents
Heat recovery drying airflow duct structure Download PDFInfo
- Publication number
- CN113566552A CN113566552A CN202110924424.7A CN202110924424A CN113566552A CN 113566552 A CN113566552 A CN 113566552A CN 202110924424 A CN202110924424 A CN 202110924424A CN 113566552 A CN113566552 A CN 113566552A
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- China
- Prior art keywords
- heat exchanger
- water heat
- plate
- cold water
- heat recovery
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
- F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/003—Supply-air or gas filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/003—Control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G2015/006—Arrangements for processing a cleaning fluid after use, e.g. filtering and recycling
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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
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention provides a heat recovery drying airflow duct structure, which is characterized in that: the upper end part of the air duct shell is provided with an air inlet; the primary filter, the intermediate filter and the plate-type heat recoverer are arranged from top to bottom; the input end of the primary filter is connected with the air inlet, and the output end of the primary filter is connected with the intermediate filter; the plate-type heat recoverer is provided with a vertical channel and a horizontal channel which are not communicated with each other, and the middle-effect filter is connected with the input end of the vertical channel; a flow guide clapboard which is obliquely arranged is arranged below the plate type heat recoverer; the plate type heat recoverer, the flow guide partition plate and the frame divide the inner cavity into a cooling area and a heating area; the output end of the vertical channel is communicated with the cooling area, the cold water heat exchanger is obliquely arranged in the cooling area, and the spraying device is arranged above the cold water heat exchanger; the hot water heat exchanger is arranged in a temperature rising area, and the output end of the hot water heat exchanger is connected with the centrifugal fan. The heat recovery drying airflow duct structure has high heat recovery efficiency.
Description
Technical Field
The invention relates to the technical field of drying equipment, in particular to a heat recovery drying airflow duct structure.
Background
In the sludge treatment process, the sludge is high in water content, so that the defects of inconvenience in transportation and difficulty in subsequent combustion and recycling exist, and therefore the sludge is usually required to be subjected to drying treatment of dewatering and drying. In the existing sludge drying device, dry hot air is sent into a drying box to absorb moisture in sludge to form saturated vapor, and then the saturated vapor comes out from the drying box, the vapor is recovered through a heat recovery structure, the vapor is discharged in the heat recovery structure in a cooling and dehumidifying mode through a condenser, then the temperature is raised to obtain dry hot air, and the dry hot air is conveyed to the drying box in a recycling mode. The heat recovery structure of the existing sludge drying device is not easy to clean, the heat exchange area is not large enough, and the condition of dust accumulation can occur after the sludge drying device is used for a period of time, so that the heat exchange efficiency is low.
Disclosure of Invention
The present invention is made to solve the above problems, and an object of the present invention is to provide a heat recovery drying airflow duct structure.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a heat recovery drying airflow duct structure, which is characterized by comprising: the device comprises an air duct shell, a primary filter, a secondary filter, a plate type heat recoverer, a cold water heat exchanger, a hot water heat exchanger, a spraying device and a centrifugal fan; an air inlet is arranged at the upper end part of the air duct shell, an inner cavity is arranged below the air inlet, and a rack is arranged in the inner cavity; the primary filter, the intermediate filter and the plate-type heat recoverer are arranged in the inner cavity from top to bottom; the input end of the primary filter is connected with the air inlet, and the output end of the primary filter is connected with the intermediate filter; the plate-type heat recoverer is provided with a vertical channel and a horizontal channel which are not communicated with each other, and the middle-effect filter is connected with the input end of the vertical channel; a flow guide partition plate is arranged below the plate type heat recoverer and is obliquely arranged; the plate type heat recoverer, the flow guide partition plate and the frame divide the inner cavity into a cooling area and a heating area; the output end of the vertical channel is communicated with the cooling area, the cold water heat exchanger is obliquely arranged in the cooling area, the spraying device is arranged above the cold water heat exchanger, and the rack is provided with a water pan; the input end of the horizontal channel is communicated with the cooling area, and the output end of the horizontal channel is communicated with the heating area; the hot water heat exchanger is arranged in a temperature rising area, and the output end of the hot water heat exchanger is connected with the centrifugal fan.
In the air duct structure of the heat recovery drying airflow provided by the invention, the air duct structure can also have the following characteristics: wherein, the primary filter, the intermediate filter, the plate heat recoverer, the cold water heat exchanger, the hot water heat exchanger and the flow guide partition plate are respectively provided with two in bilateral symmetry; the spraying device is one and is arranged in the middle of the top of the inner cavity; the water receiving plate is one and is arranged in the middle of the inner cavity; the centrifugal fan is one and is arranged in the middle of the bottom of the inner cavity.
In the air duct structure of the heat recovery drying airflow provided by the invention, the air duct structure can also have the following characteristics: the upper end part of the cold water heat exchanger is close to the symmetry axis, and the lower end part of the cold water heat exchanger is far away from the symmetry axis; the cold water heat exchanger forms an included angle of 45 degrees with the horizontal direction.
In the air duct structure of the heat recovery drying airflow provided by the invention, the air duct structure can also have the following characteristics: the flow guide partition plate is arranged with the upper end part far away from the symmetry axis and the lower end part close to the symmetry axis; the guide baffle plate forms an included angle of 135 degrees with the horizontal direction.
In the air duct structure of the heat recovery drying airflow provided by the invention, the air duct structure can also have the following characteristics: wherein, the water pan is provided with two drain holes around the symmetry axis.
In the air duct structure of the heat recovery drying airflow provided by the invention, the air duct structure can also have the following characteristics: wherein, two hot water heat exchangers are respectively arranged at the left side and the right side of the centrifugal fan.
The invention has the beneficial effects that:
1) the heat recovery drying airflow duct structure is characterized in that the airflow direction layout is specific, and the cold water heat exchangers are obliquely arranged, so that the heat exchange area is increased in a limited structure, the cold water heat exchangers are symmetrically arranged in the middle, and the airflow is concentrated in the middle area for dehumidification, so that the efficiency is high.
2) The heat recovery drying airflow duct structure is compact in arrangement structure of all parts, and the spraying device is arranged above the cold water heat exchanger, so that the cold water heat exchanger can be cleaned and dedusted, and good heat exchange efficiency is ensured.
3) The cold water heat exchanger in the heat recovery drying airflow duct structure is obliquely arranged, the upper end part of the cold water heat exchanger is close to the symmetry axis, and the lower end of the cold water heat exchanger is far away from the symmetry axis, so that on one hand, spraying and washing can be clean, and on the other hand, spraying water can be saved.
4) The two hot water heat exchangers in the heat recovery drying airflow duct structure are symmetrically arranged close to the centrifugal fan, so that airflow circulation can be accelerated, and air supply efficiency is effectively improved.
5) The heat recovery efficiency of the heat recovery drying airflow duct structure is higher than that of the traditional air duct structure by more than 70%, the cold load and the power consumption in the operation process of the heat pump are reduced, and the effects of energy conservation and emission reduction are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a heat recovery drying airflow duct structure in an embodiment of the present invention.
Reference numerals: 1-primary filter; 2-a medium-effect filter; 3-plate heat recovery; 4-a cold water heat exchanger; 5-a spraying device; 6-hot water heat exchanger; 7-a centrifugal fan; 8-a water pan; 9-a drain hole; 10-air inlet; 11-diversion baffle plate.
Detailed Description
In order to make the technical means, creation features, achievement objects and effects of the present invention easy to understand, the following embodiments will specifically describe the heat recovery drying airflow duct structure of the present invention with reference to the accompanying drawings.
< example >
As shown in fig. 1, a heat recovery drying airflow duct structure of the present embodiment includes: the device comprises an air duct shell, a primary filter 1, a secondary filter 2, a plate type heat recovery device 3, a cold water heat exchanger 4, a hot water heat exchanger 6, a spraying device 5, a centrifugal fan 7, a water pan 8 and a flow guide partition plate 11.
An air inlet 10 is arranged at the upper end part of the air duct shell, and an inner cavity is arranged below the air inlet 10. The air inlet 10 is connected with the drying box and is a return air inlet of the humid air flow.
The number of the primary filter 1, the middle filter 2, and the plate heat recovery unit 3 is two, and the two groups are bilaterally symmetrical as shown in fig. 1, and a symmetry axis (the symmetry axis is a geometric symmetry axis and is not a real entity) is indicated by a dotted line in fig. 1. Primary filter 1, well effect filter 2, board-like heat recovery device 3 set up in the inner chamber from last to down, and the air intake is connected to primary filter 1's input, and primary filter 1's output is connected well effect filter 2. The plate-type heat recoverer 3 is provided with a vertical direction channel and a horizontal direction channel which are not communicated with each other, and the output end of the middle-effect filter 2 is connected with the input end of the vertical direction channel of the plate-type heat recoverer 3.
Flow guide partition plates 11 are respectively arranged below the two plate type heat recoverers 3. The two flow guide partition plates 11 are arranged in bilateral symmetry. As shown in fig. 1, the baffle 11 has an upper end portion away from the symmetry axis and a lower end portion close to the symmetry axis. The baffle 11 is angled 135 degrees from horizontal (angle a shown in fig. 1). The specific angle of the baffle 11 can guide the airflow to flow in a specific direction.
The plate type heat recoverer 3, the flow guide partition plate 11 and the frame divide the inner cavity into a cooling area and a heating area. The cooling area is located in the middle of the inner cavity, and the heating area is located on the left side and the right side of the inner cavity. The output end of the vertical channel of the plate-type heat recoverer 3 is communicated with a cooling area. The input end of the horizontal channel of the plate-type heat recoverer 3 is communicated with the cooling area, and the output end of the horizontal channel is communicated with the heating area.
The number of the cold water heat exchangers 4 is two, and the two cold water heat exchangers 4 are arranged in the cooling area in a bilateral symmetry manner. The upper end part of the cold water heat exchanger 4 is close to the symmetry axis, and the lower end part is far away from the symmetry axis. The cold water heat exchanger 4 is at an angle of 45 degrees to the horizontal (angle b shown in figure 1). The cold water heat exchanger 4 is a dehumidification heat exchanger, and the medium is cold water.
The spraying device 5 is arranged above the cold water heat exchanger 4 and is positioned in the middle of the top of the inner cavity. The spraying device 5 is provided with a plurality of spraying heads which are connected with a water conveying pipeline or a water storage device.
The frame is provided with a water pan 8, the water pan 8 is provided with two drain holes 9 about the symmetry axis, and the drain holes 9 are connected with a drainage pipeline (not shown).
The two hot water heat exchangers 6 are arranged in the temperature rising area in a bilateral symmetry mode and are close to the left side and the right side of the centrifugal fan 7. The output end of the hot water heat exchanger 6 is connected with a centrifugal fan, and the air outlet of the centrifugal fan 7 is connected with a drying box. The medium of the hot water heat exchanger 6 is hot water. The hot water heat exchanger 6 is arranged at a position close to the centrifugal fan 7, so that the air supply efficiency is effectively improved.
The working process of the heat recovery drying airflow duct structure of the embodiment is as follows:
the air inlet 10 is connected with the drying box through a pipeline, and the return air flow enters the inner cavity and flows in the direction shown in figure 1 through the suction action of the centrifugal fan 7. The moist gas that enters into the inner chamber at first filters through primary filter 1 and median filter 2, then enters into the vertical direction passageway of plate heat recovery device 3, exports after the heat transfer cooling of plate heat recovery device 3, then, and gas is via cooling dehumidification of cooling water heat exchanger 4 cooling. The dehumidified dry gas enters a horizontal channel of the plate-type heat recoverer 3, is output after being subjected to heat exchange and temperature rise through the plate-type heat recoverer 3, and then is subjected to heat exchange and temperature rise through the hot water heat exchanger 6. The dried hot air flows through the centrifugal fan 7 for suction, the air outlet of the centrifugal fan 7 is connected with the drying box through a pipeline, and hot air enters the drying box to dry sludge. And in the sludge drying process, the airflow circularly flows in a closed mode, and the treatment process is repeated.
After a period of time, the cold water heat exchanger 4 can be sprayed and cleaned through the spraying device 5, dust floating on the cold water heat exchanger 4 is washed, and the water receiving disc 8 collects cleaned sewage and discharges the sewage through the water discharging hole 9. Preferably, the spraying device 5 is electrically connected with a timer, and the regular cleaning time is set, so that the spraying device 5 sprays water at certain intervals to automatically clean the cold water heat exchanger 4 once. In the embodiment, the cold water heat exchanger 4 is inclined at 45 degrees to the horizontal direction, so that on one hand, the heat exchange area can be increased in a limited inner cavity space; on the other hand, this 45 degrees washing angle setting, washing water can be followed its gradient and from the top down flows, and every position of cold water heat exchanger all can be washd, also can ensure that the cleaning performance is good under the condition that only sets up spray set in the middle of the top.
The above embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a heat recovery stoving air current wind channel structure which characterized in that includes: the device comprises an air duct shell, a primary filter, a secondary filter, a plate type heat recoverer, a cold water heat exchanger, a hot water heat exchanger, a spraying device and a centrifugal fan;
an air inlet is formed in the upper end of the air duct shell, an inner cavity is formed below the air inlet, and a rack is arranged in the inner cavity;
the primary filter, the intermediate filter and the plate-type heat recoverer are arranged in the inner cavity from top to bottom;
the input end of the primary filter is connected with the air inlet, and the output end of the primary filter is connected with the intermediate filter;
the plate-type heat recoverer is provided with a vertical direction channel and a horizontal direction channel which are not communicated with each other, and the middle-effect filter is connected with the input end of the vertical direction channel;
a flow guide partition plate is arranged below the plate type heat recoverer and is obliquely arranged;
the plate type heat recoverer, the flow guide partition plate and the frame divide the inner cavity into a cooling area and a heating area;
the output end of the vertical channel is communicated with the cooling area, the cold water heat exchanger is obliquely arranged in the cooling area, the spraying device is arranged above the cold water heat exchanger, and the rack is provided with a water pan;
the input end of the horizontal channel is communicated with the cooling area, and the output end of the horizontal channel is communicated with the heating area;
the hot water heat exchanger is arranged in the temperature rising area, and the output end of the hot water heat exchanger is connected with the centrifugal fan.
2. The heat recovery drying airflow duct structure of claim 1, wherein:
the primary filter, the intermediate filter, the plate-type heat recoverer, the cold water heat exchanger, the hot water heat exchanger and the flow guide partition plate are respectively provided with two in bilateral symmetry;
the spraying device is one and is arranged in the middle of the top of the inner cavity;
the water receiving plate is arranged in the middle of the inner cavity;
the centrifugal fan is one and is arranged in the middle of the bottom of the inner cavity.
3. The heat recovery drying airflow duct structure of claim 2, wherein:
the upper end part of the cold water heat exchanger is close to the symmetry axis, and the lower end part of the cold water heat exchanger is far away from the symmetry axis;
and the cold water heat exchanger forms an included angle of 45 degrees with the horizontal direction.
4. The heat recovery drying airflow duct structure of claim 2, wherein:
the flow guide partition plate is arranged with the upper end part far away from the symmetry axis and the lower end part close to the symmetry axis;
the diversion baffle plate forms an included angle of 135 degrees with the horizontal direction.
5. The heat recovery drying airflow duct structure of claim 2, wherein:
wherein, the water pan is provided with two drain holes around the symmetry axis.
6. The heat recovery drying airflow duct structure of claim 2, wherein:
wherein, two hot water heat exchangers are respectively arranged at the left side and the right side of the centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110924424.7A CN113566552A (en) | 2021-08-12 | 2021-08-12 | Heat recovery drying airflow duct structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110924424.7A CN113566552A (en) | 2021-08-12 | 2021-08-12 | Heat recovery drying airflow duct structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113566552A true CN113566552A (en) | 2021-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110924424.7A Pending CN113566552A (en) | 2021-08-12 | 2021-08-12 | Heat recovery drying airflow duct structure |
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| Country | Link |
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| CN (1) | CN113566552A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875191A (en) * | 2022-05-25 | 2022-08-09 | 广州滨横低碳科技有限公司 | Blast furnace blast dehumidifier with self-cleaning function |
-
2021
- 2021-08-12 CN CN202110924424.7A patent/CN113566552A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114875191A (en) * | 2022-05-25 | 2022-08-09 | 广州滨横低碳科技有限公司 | Blast furnace blast dehumidifier with self-cleaning function |
| CN114875191B (en) * | 2022-05-25 | 2023-07-14 | 广州滨横低碳科技有限公司 | Blast furnace blast dehumidifier with self-cleaning function |
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