CN110668672B - Sludge heat pump drying airflow optimization system - Google Patents
Sludge heat pump drying airflow optimization system Download PDFInfo
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- CN110668672B CN110668672B CN201911117571.2A CN201911117571A CN110668672B CN 110668672 B CN110668672 B CN 110668672B CN 201911117571 A CN201911117571 A CN 201911117571A CN 110668672 B CN110668672 B CN 110668672B
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- sludge
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- drying
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
本发明涉及污泥烘干领域，公开了一种污泥热泵烘干气流优化系统，该系统包括凝结水收集装置、送风设备、热泵系统、风循环系统及污泥处理设备；热泵系统负责热风的供应并将湿空气中的水蒸气冷凝集流至凝结水收集装置，热空气经送风设备导入烘干房，对传送链带上的污泥进行烘干，形成的湿空气经上部出风口回流至热泵系统；送风机出流热风流经下层链带后风速衰减，因此，传送链带上层污泥烘干气流流速较下层低，而上层污泥含水率较下层高，含水率和风速不匹配，烘干效率较低；本发明于上下层传送链带中间设置导流隔板组件，使上层烘干气流增速，增强上层高含水率污泥的传质效果，由此，通过优化烘干气流系统，显著提升污泥烘干效率。
The invention relates to the field of sludge drying, and discloses a sludge heat pump drying airflow optimization system, which comprises a condensate collecting device, an air supply device, a heat pump system, an air circulation system and a sludge treatment device; the heat pump system is responsible for the supply of hot air and condenses water vapor in the humid air and collects it to the condensate collecting device, the hot air is introduced into a drying room through the air supply device, the sludge on the conveyor chain is dried, and the formed humid air flows back to the heat pump system through the upper air outlet; the wind speed of the hot air discharged by the blower decays after passing through the lower chain belt, so that the airflow velocity of the sludge drying airflow on the upper layer of the conveyor chain belt is lower than that on the lower layer, while the water content of the sludge on the upper layer is higher than that on the lower layer, the water content and the wind speed do not match, and the drying efficiency is low; the invention arranges a guide baffle assembly between the upper and lower conveyor chain belts to increase the speed of the upper drying airflow, enhance the mass transfer effect of the upper layer sludge with high water content, thereby significantly improving the sludge drying efficiency by optimizing the drying airflow system.
Description
Technical Field
The invention relates to a sludge treatment system, in particular to a sludge drying system.
Background
At present, with the development of the economic society of China, the output of domestic industrial wastewater and domestic sewage is continuously improved, and a byproduct of sludge is generated in the process of treating the sewage. The total output of Chinese sludge in 2018 is 5665 ten thousand tons, GEP RESEARCH is expected to reach 6177 ten thousand tons by 2020, and the compound growth rate in the next three years is expected to be about 4%. The sludge has complex components, contains nutrient elements such as nitrogen, phosphorus, potassium and the like, can utilize organic matters, is poisonous, harmful and difficult to degrade, contains heavy metals and pathogenic bacteria, has high water content, and is easy to perish and malodor. In order to achieve the aim of sludge innocuity and recycling, the sludge is required to be dried.
The heat pump drying technology has the characteristics of high energy efficiency, and the heat pump system has high reliability and is widely applied to the field of sludge drying. However, the air supply in the drying room has the problem of low efficiency, the water content in the sludge drying process is gradually reduced in the conveying mesh belt type drying mode, the difference of the water contents of the upper layer sludge and the lower layer sludge of the conveying mesh belt is not considered in actual air supply, and the drying efficiency cannot be effectively improved simply by increasing the power of the heat pump. Therefore, a heat pump drying air flow system based on a step air supply concept needs to be designed.
Disclosure of Invention
The invention aims to provide a sludge heat pump drying air flow optimizing system which accords with the cascade air supply principle, realizes the matching of the sludge moisture content and the air speed, enhances the heat and mass transfer effect and reduces the sludge drying energy consumption.
The invention aims to realize a sludge heat pump drying air flow optimizing system, which comprises a condensate water collecting device, air supply equipment, a heat pump system, an air circulation system and sludge treatment equipment;
The condensed water collecting device comprises a condensed water pipe (15) and a water tank (16) which are arranged outside the heat pump system (1), and is used for collecting condensed water generated after heat exchange in the heat pump system;
the air supply device comprises an air feeder (3) and a motor (4) which are arranged at the bottom of the drying room (17), and is used for blowing hot air generated by the heat pump system (1) into the drying room;
The heat pump system (1) is used for generating hot air, and can also receive wet air generated by the drying room (17), perform condensation treatment on the wet air and realize air circulation in the drying room (17);
the air circulation system comprises an air inlet pipeline (2), a sludge outlet side wind shield (5), a flow guide baffle plate assembly (9), a left side wind shield (14), an air outlet (12) and an air outlet pipeline (13), wherein the air circulation system is used for realizing air circulation between a drying room (17) and a heat pump system (1), the air inlet pipeline (2) is connected with the air outlet of the heat pump system (1) and a blower (3), the sludge outlet side wind shield (5) and the left side wind shield (14) are used for realizing hot air guiding in the drying room (17), the flow guide baffle plate assembly (9) is used for controlling the flow velocity of air between sludge treatment equipment, and the air outlet (12) and the air outlet pipeline (13) are used for connecting the drying room (17) and the air inlet of the heat pump system (1);
The sludge treatment equipment comprises a sludge inlet (10), a conveying chain belt (8), a chain belt side baffle (7) and a sludge outlet baffle (6), and is used for conveying sludge, so that the sludge is fully contacted with hot air to realize drying, and the conveying chain belt (8) is arranged in the middle of a drying room (17).
As a further definition of the invention, the conveyor belt (8) is provided with two layers.
As a further limitation of the invention, the left wind shield (14) is arranged beside the discharging end of the upper layer conveying chain belt (8), the left wind shield (14) plays a role in guiding hot air and guiding sludge when the upper layer conveying chain belt (8) is transferred to the lower layer conveying chain belt (8), the sludge outlet wind shield (5) is arranged below the discharging end of the lower layer conveying chain belt (8) and beside the sludge outlet baffle (6), and the sludge outlet wind shield (5) plays a role in guiding hot air and guiding sludge discharge.
As a further definition of the invention, the baffle plate assembly (9) is arranged between two layers of conveyor belts (8).
As a further limitation of the invention, the flow guide baffle assembly (9) comprises a plurality of pairs of symmetrical splayed inclined baffles, and two adjacent pairs of inclined baffles are connected through a horizontal baffle.
As a further limitation of the invention, the bottom of the inclined partition plate is hinged on the side wall of the drying room (17), and the included angle between the inclined partition plate and the horizontal plane is 45-60 degrees.
As a further definition of the invention, the inclined partition is twice the length of the horizontal partition.
As a further limitation of the invention, the air outlet of the air blower (3) faces to the right upper side.
As a further limitation of the invention, the mud outlet baffle (6) is a spring baffle.
As a further limitation of the invention, the chain belt side baffle plate (7) is matched with the conveying chain belt (8).
The technical scheme adopted by the invention has the following advantages:
1. The air circulation system is closed, and the mud outlet baffle is designed into a spring type, so that the air flow of the drying room is effectively prevented from leaking, and the environment is prevented from being polluted by harmful gas in the drying room.
2. According to the invention, the chain belt side baffles are arranged on the two lateral sides of the conveying chain belt, so that the phenomenon that sludge falls to the ground of a drying room to cause equipment damage or increase bottom airflow resistance is avoided.
3. According to the invention, the flow guide baffle plate assembly is designed according to the gradient air supply concept aiming at the difference of the water content of the upper and lower layers of sludge on the conveyor chain, so that the air speed of the drying air flow of the upper layer of sludge is improved, the mass transfer effect of the upper layer of sludge with high water content is enhanced, and the sludge drying efficiency is obviously improved.
Drawings
Fig. 1 is a schematic diagram of a sludge heat pump drying air flow optimizing system of the invention.
FIG. 2 is a schematic view of the conveyor belt spacer assembly of the present invention with different angles of inclination, inclined spacer lengths and cross spacer lengths.
Fig. 3 is a cloud image of the drying air flow velocity field inside the drying room of the present invention.
The reference numerals indicate that the heat pump system 1, the air inlet pipeline 2, the blower 3, the motor 4, the sludge outlet side wind shield 5, the sludge outlet baffle 6, the chain belt side baffle 7, the conveying chain belt 8, the guide baffle plate component 9, the sludge inlet 10, the drying room bracket 11, the air outlet 12, the air outlet pipeline 13, the left wind shield 14, the condensation water pipe 15, the water tank 16 and the drying room 17.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
1-2, A sludge heat pump drying air flow optimizing system comprises a condensate water collecting device, an air supply device, a heat pump system, an air circulation system and a sludge treatment device;
the condensed water collecting device comprises a condensed water pipe 15 and a water tank 16 which are arranged outside the heat pump system 1, and is used for collecting condensed water generated after heat exchange in the heat pump system 1;
The air supply device comprises an air supply device 3 and a motor 4 which are arranged at the bottom of the drying room 17, and is used for blowing hot air generated by the heat pump system 1 into the drying room, and an air outlet of the air supply device 3 faces to the right upper side;
The heat pump system 1 is used for generating hot air, and can also receive wet air generated by the drying room 17, so as to perform condensation treatment on the wet air and realize air circulation in the drying room 17;
The air circulation system comprises an air inlet pipeline 2, a sludge outlet side wind shield 5, a flow guide baffle plate assembly 9, a left side wind shield 14, an air outlet 12 and an air outlet pipeline 13, wherein the air circulation system is used for realizing air circulation between a drying room 17 and the heat pump system 1, the air inlet pipeline 2 is connected with the air outlet of the heat pump system 1 and the blower 3, the sludge outlet side wind shield 5 and the left side wind shield 14 are used for realizing hot air guiding in the drying room 17, the flow guide baffle plate assembly 9 is used for controlling the flow rate of air between sludge treatment equipment, and the air outlet 12 and the air outlet pipeline 13 are used for connecting the drying room 17 and the air inlet of the heat pump system 1;
The sludge treatment equipment comprises a sludge inlet 10, a conveying chain belt 8, a chain belt side baffle 7 and a sludge outlet baffle 6, wherein the sludge treatment equipment is used for conveying sludge, so that the sludge is fully contacted with hot air, drying is realized, the conveying chain belt 8 is arranged in the middle of a drying room 17, the sludge outlet baffle 6 is a spring baffle, the chain belt side baffle 7 is matched with the conveying chain belt 8, the conveying chain belt 8 is provided with two layers, a left wind baffle 14 is arranged beside the discharging end of the upper conveying chain belt 8, the left wind baffle 14 plays a role in guiding the hot air and simultaneously plays a role in guiding the sludge when the upper conveying chain belt 8 is transferred to the lower conveying chain belt 8, the sludge outlet wind baffle 5 is arranged below the discharging end of the lower conveying chain belt 8 and beside the sludge outlet baffle 6, the sludge outlet side wind baffle 5 plays a role in guiding the hot air, a guide baffle assembly 9 is arranged between the two layers of the conveying chain belt 8, a plurality of pairs of inclined baffles which are symmetrical eight-shaped, two pairs of adjacent inclined baffles are connected through horizontal baffles, the bottoms of the inclined baffles are hinged to each other on the bottom of the drying baffles 11 and the inclined baffles are at an angle of 60 DEG between the inclined brackets and the horizontal planes of the inclined baffles 60 DEG.
Referring to fig. 1, hot air at the outlet of a condenser in the heat pump system 1 is conveyed to a drying room 17 towards the right upper side by a blower 3 driven by a motor 4, is restrained by a left wind shield 14 and a sludge outlet wind shield 5, and is intensively blown to sludge on a conveyor belt 8 from the bottom, so that moisture in the sludge is separated out through an internal pore of the sludge and is wrapped by the hot air, the moisture flows to the heat pump system 1 through an air outlet pipeline 13, the evaporator in the heat pump system 1 condenses and dehumidifies the wet air, and condensed water is collected into a water tank 16 from a condensation water pipe 15.
The sludge treatment equipment is characterized in that sludge is led in by a sludge inlet 10 and is conveyed by a conveying chain belt 8, the internal moisture is diffused and evaporated into hot air, the moisture content gradually decreases along the conveying direction of the sludge, and finally the sludge is conveyed to a sludge outlet baffle 6, so that the recovery of the dried sludge is realized.
Considering that the time required for drying the sludge is longer, the conveying chain belt 8 is divided into an upper layer and a lower layer, so that the sludge is gradually dried and meets the recycling requirement, meanwhile, considering that the flexibility of the sludge is easy to fall to the ground, equipment arranged on the ground is damaged, the conveying chain belt 8 is matched with the chain belt side baffle 7, and the sludge is effectively prevented from overflowing from the side surface of the conveying chain belt 8.
The baffle plate assembly 9 is arranged between the upper layer conveying chain belt 8 and the lower layer conveying chain belt 8 in the wind circulation system, as shown in fig. 2, the baffle plates in the baffle plate assembly 9 are in a symmetrical eight shape, the length of the inclined baffle plate is 2L, the length of the horizontal baffle plate is L, and the baffle plate assembly 9 is arranged to improve the upper layer drying airflow speed, so that the conveying quality of the upper layer high water content sludge, namely the water analysis amount, is improved, and the sludge drying efficiency is remarkably improved.
In consideration of the change of drying working conditions caused by the difference of the water content of the supplied sludge, the inclination angle of the partition plate is designed to be 45-60 degrees and is adjustable, when the water content of the supplied sludge is low, the inclination angle of the partition plate is correspondingly increased, the air flow resistance is reduced, and when the water content of the supplied sludge is high, the inclination angle of the partition plate is correspondingly reduced, the air speed of the drying air flow of the upper-layer sludge is further improved, and the mass transfer effect of the upper-layer high-water-content sludge is enhanced. As shown in a cloud chart of a drying airflow speed field in the drying room 17 in FIG. 3, the flow speed of the airflow at the outlet of the included angle at the upper end of the guide baffle is as high as 5.5m/s, so that the convection heat and mass transfer effect of the upper sludge and the wet air can be effectively improved.
In summary, the air circulation system is closed, the mud outlet baffle 6 is designed to be spring type, so that the leakage of air flow of the drying room 17 is effectively avoided, the environment is prevented from being polluted by harmful gas in the drying room 17, the chain belt side baffle 7 is arranged for the conveying chain belt 8, the equipment damage caused by overflow of mud from the side surface of the conveying chain belt 8 is effectively avoided, the flow guide baffle assembly 9 is designed according to the gradient air supply concept aiming at the difference of the water content of the upper layer mud and the lower layer mud of the conveying chain belt 8, the air speed of the upper layer mud drying air flow is improved, the mass transfer effect of the upper layer high water content mud is enhanced, and the mud drying efficiency is remarkably improved.
The invention is not limited to the above embodiments, and based on the technical solution disclosed in the invention, a person skilled in the art may make some substitutions and modifications to some technical features thereof without creative effort according to the technical content disclosed, and all the substitutions and modifications are within the protection scope of the invention.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911117571.2A CN110668672B (en) | 2019-11-15 | 2019-11-15 | Sludge heat pump drying airflow optimization system |
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| CN201911117571.2A CN110668672B (en) | 2019-11-15 | 2019-11-15 | Sludge heat pump drying airflow optimization system |
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| CN110668672A CN110668672A (en) | 2020-01-10 |
| CN110668672B true CN110668672B (en) | 2025-06-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111453969A (en) * | 2020-05-13 | 2020-07-28 | 南京中盛宏信环保工程有限公司 | A sludge dryer |
| CN115420066B (en) * | 2022-08-12 | 2024-05-03 | 农业农村部南京农业机械化研究所 | Double-layer vibration fluidization drying device based on array turbulence and drying method thereof |
| CN116655207A (en) * | 2023-06-01 | 2023-08-29 | 江苏博一环保科技有限公司 | Circulating sludge heat pump drying device convenient to steam is retrieved |
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| CN206368103U (en) * | 2016-12-29 | 2017-08-01 | 江苏绿威环保科技有限公司 | A kind of sludge vacuum normal temperature desiccation apparatus |
| CN208500724U (en) * | 2018-05-23 | 2019-02-15 | 昆山绿威环保科技有限公司 | Sludge dehumidifying heat pump drying equipment |
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| CN211005067U (en) * | 2019-11-15 | 2020-07-14 | 江苏博一环保科技有限公司 | Sludge heat pump drying airflow optimization system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101179523B1 (en) * | 2011-12-09 | 2012-09-10 | (주)이렛하이테크 | Manufacture device of activation matter using sewage sludges |
| CN108298791A (en) * | 2018-03-22 | 2018-07-20 | 天津五洲同创空调制冷设备有限公司 | A kind of novel multi-functional sludge heat pump desiccation machine |
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- 2019-11-15 CN CN201911117571.2A patent/CN110668672B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206368103U (en) * | 2016-12-29 | 2017-08-01 | 江苏绿威环保科技有限公司 | A kind of sludge vacuum normal temperature desiccation apparatus |
| CN208500724U (en) * | 2018-05-23 | 2019-02-15 | 昆山绿威环保科技有限公司 | Sludge dehumidifying heat pump drying equipment |
| CN209619163U (en) * | 2019-01-26 | 2019-11-12 | 山东环科环保科技有限公司 | It is a kind of can automatic dust removing sludge drying machine |
| CN211005067U (en) * | 2019-11-15 | 2020-07-14 | 江苏博一环保科技有限公司 | Sludge heat pump drying airflow optimization system |
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