CN111977938A - Sludge drying device - Google Patents
Sludge drying device Download PDFInfo
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- CN111977938A CN111977938A CN201910422214.0A CN201910422214A CN111977938A CN 111977938 A CN111977938 A CN 111977938A CN 201910422214 A CN201910422214 A CN 201910422214A CN 111977938 A CN111977938 A CN 111977938A
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- sludge
- drying box
- condenser
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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
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- 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
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- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a sludge drying device, which comprises: the drying box (1) is provided with a sludge feeding hole, a plurality of layers of sludge conveying belts (3) are arranged in the drying box, and sludge materials fall on the sludge conveying belts (3) from the sludge feeding hole; the heat pump system (2) is communicated with the drying box (1), the heat pump system (2) comprises a compressor, a first condenser (4), an evaporator (5) and a main fan (6), the compressor, the condenser (4) and the evaporator (5) are connected through refrigerant pipelines, and the main fan (6) is communicated with the drying box (1); the microwave assembly (10) is arranged in the drying box (1) or outside the drying box (1), and microwaves generated by the microwave assembly (10) are introduced into the drying box (1). The invention improves the drying efficiency and reduces the drying energy consumption.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a sludge drying device.
Background
The reduction treatment of sewage and sludge usually needs to be carried out through links such as filter pressing dehydration, discharging, sludge drying, crushing, incineration and the like, and the actual treatment can use part or all of the processes. The drying of the sludge is a link in the sludge treatment and is a key process of the sludge reduction treatment.
The sludge drying device in the prior art mainly utilizes an oven to dry sludge materials, and the drying process generally only adopts hot air for drying. Therefore, the sludge drying technology in the prior art mainly utilizes hot air circulation drying, and has high energy consumption. In addition, the simple hot air circulation can cause the problem that moisture is difficult to carry out, and drying efficiency is affected.
Disclosure of Invention
Aiming at the technical problems of high energy consumption and low drying efficiency in the prior art, the invention provides the sludge drying device, which reduces the drying energy consumption and improves the drying efficiency.
The technical scheme of the invention is to provide a sludge drying device, which comprises:
the drying box is provided with a sludge feeding hole, a plurality of layers of sludge conveying belts are arranged in the drying box, and sludge materials fall on the sludge conveying belts from the sludge feeding hole;
the heat pump system is communicated with the drying box and comprises a compressor, a first condenser, an evaporator and a main fan, the compressor, the condenser and the evaporator are connected through refrigerant pipelines, and the main fan is communicated with the drying box;
the sludge drying device further comprises a microwave assembly, the microwave assembly is arranged in the drying box or outside the drying box, and microwaves generated by the microwave assembly are introduced into the drying box.
Optionally, the refrigerant forms a high-pressure high-temperature gas form in the compressor, flows to the first condenser, exchanges heat with air in the first condenser to raise the temperature of peripheral air, and the main fan brings high-temperature air into the drying box to dry sludge materials; the refrigerant flowing out of the condenser passes through a throttle valve in a low-temperature and low-pressure two-phase state, flows to the evaporator, is gasified after heat exchange in the evaporator, and then enters the compressor again.
Optionally, the heat pump system further comprises a second condenser and a circulating fan, the second condenser is connected with the compressor and the evaporator, a circulating air pipeline is arranged on the drying box, one end of the circulating air pipeline is communicated with the drying box, the other end of the circulating air pipeline is communicated with the circulating fan, the circulating fan is communicated with the drying box, and the second condenser is communicated with the circulating fan through air.
Optionally, the heat pump system further includes a heat regenerator, the heat regenerator is communicated with the drying box, a part of hot air flowing out of the drying box and cold air flowing out of the evaporator after heat exchange intersect in the heat regenerator in a non-contact manner to exchange heat, a part of hot air flowing out of the drying box flows to the evaporator after flowing out of the heat regenerator, and cold air flowing out of the evaporator after heat exchange flows to the first condenser after flowing out of the heat regenerator.
Optionally, a filter is arranged on an air inlet side of the circulating air pipeline, the filter is arranged in front of the second condenser, and a position between the filter and the second condenser is communicated with the heat regenerator.
Optionally, the transmission directions of the upper layer and the lower layer of the multi-layer sludge conveying belt are opposite, a receiving plate is arranged between the tail end of the upper layer sludge conveying belt and the starting end of the lower layer sludge conveying belt, and a blanking device is arranged at the tail end of the lowest layer sludge conveying belt.
Optionally, the conveying belt is made of a non-metal material.
Optionally, the heat pump system further includes a water heat exchanger, and the water heat exchanger is disposed between the heat regenerator and the evaporator.
Optionally, the sludge drying device further comprises a slitter, wherein the slitter extrudes or cuts the belt-treated sludge into strips, and the strips are used as sludge materials to enter the conveying belt of the drying box from the sludge feeding hole.
Optionally, a temperature and humidity sensor is arranged at the air outlet of the drying oven, when the humidity of air at the outlet of the drying oven is detected to be larger than a set threshold value, the circulating fan stops working, and all air volume is conveyed into the drying oven through the main fan.
The technology of the invention has the following advantages: the sludge is extruded into strip-shaped sludge strips to fall on a lower conveying belt under the action of the slitter; the drying medium of the system is air, dry hot air enters the drying box under the action of the fan and contacts with sludge on the conveying belt, meanwhile, a microwave generator above the conveying belt starts to work, microwave radiation is carried out on sludge particles, moisture in the sludge starts to evaporate, the air is changed into damp hot air through cooling and humidifying, moisture in the sludge is taken away, the sludge enters the heat regenerator for precooling and is cooled through an evaporator of the heat pump to be dehumidified to separate out condensate water to be changed into dry cold air, the dry cold air enters the condenser after being preheated by the heat regenerator to be heated to be changed into the dry hot air, and the circulation process is completed. The invention improves the drying efficiency and reduces the drying energy consumption.
Drawings
FIG. 1 is a schematic structural diagram of a sludge drying apparatus according to the present invention;
fig. 2 is a schematic diagram of the structure of the heat pump system.
Shown in the figure: 1. the system comprises a drying box, 2, a heat pump system, 3, a sludge conveying belt, 4, a first condenser, 5, an evaporator, 6, a main fan, 7, a second condenser, 8, a circulating fan, 9, a circulating air pipeline, 10, a microwave assembly, 11, a heat regenerator, 12, a filter, 13, a receiving plate, 14, a blanking device, 15, a water heat exchanger, 16, a slitting machine, 17, a compressor, 18, a gas-liquid separator, 19, a drying filter, 20, a throttle valve, 21 and an oil-gas separator.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Moreover, the drawings of the present invention are not necessarily to scale, nor are they necessarily to scale, as may be shown and described herein.
As shown in fig. 1, the concrete structure of the sludge drying apparatus of the present invention is illustrated, which includes:
the drying box 1 is provided with a sludge feeding hole, a plurality of layers of sludge conveying belts 3 are arranged in the drying box, and sludge materials fall on the sludge conveying belts 3 from the sludge feeding hole;
the heat pump system 2 is communicated with the drying box 1, the heat pump system 2 comprises a compressor, a first condenser 4, an evaporator 5 and a main fan 6, the compressor, the condenser 4 and the evaporator 5 are connected through refrigerant pipelines, and the main fan 6 is communicated with the drying box 1;
the refrigerant forms a high-pressure high-temperature gas form in the compressor, flows to the first condenser 4, exchanges heat with air in the first condenser 4 to raise the temperature of peripheral air, and the main fan 6 brings high-temperature air into the drying box 1 to dry sludge materials; the refrigerant flowing out of the first condenser 4 flows to the evaporator 5 through a throttle valve in a low-temperature and low-pressure two-phase state, exchanges heat in the evaporator 5, is gasified, and enters the compressor again.
The heat pump system further comprises a second condenser 7 and a circulating fan 8, the second condenser 7 is connected with the compressor and the evaporator 5, a circulating air pipeline 9 is arranged on the drying box 1, one end of the circulating air pipeline is communicated with the drying box, the other end of the circulating air pipeline is communicated with the circulating fan, the circulating fan 8 is communicated with the drying box 17, and the second condenser is communicated with the circulating fan 8 through air.
The sludge drying device further comprises a microwave assembly 10, the microwave assembly 10 is installed in the drying box 1 or outside the drying box 1, and microwaves generated by the microwave assembly 10 are introduced into the drying box 1.
The heat pump system further comprises a heat regenerator 11, the heat regenerator 11 is communicated with the drying box 1, part of hot air flowing out of the drying box and cold air flowing out of the evaporator 5 after heat exchange are subjected to non-contact intersection heat exchange in the heat regenerator 11, part of hot air flowing out of the drying box 1 flows to the evaporator 5 after flowing out of the heat regenerator 11, and cold air flowing out of the evaporator 5 after heat exchange flows to the first condenser 4 after flowing out of the heat regenerator 11.
And a filter 12 is arranged on the air inlet side of the circulating air pipeline, the filter 12 is arranged in front of the second condenser 7, and the part between the filter 12 and the second condenser 7 is communicated with the heat regenerator 11. The filter 12 is used for filtering dust.
The transmission directions of the upper layer and the lower layer of the multi-layer sludge conveying belt 3 are opposite, a receiving plate 13 is arranged between the tail end of the upper layer sludge conveying belt 3 and the starting end of the lower layer sludge conveying belt 3, and a blanking device 14 is arranged at the tail end of the lowest layer sludge conveying belt 3.
The sludge conveying belt 3 is made of a non-metal material, such as teflon material. The side can be conveniently compatible with the microwave, and the influence of the microwave on the sludge conveying belt is avoided.
The heat pump system further comprises a water heat exchanger 15, and the water heat exchanger 15 is arranged between the heat regenerator 12 and the evaporator 5.
The sludge drying device further comprises a slitter 16, wherein the slitter 16 extrudes or cuts the sludge to be treated into strips, and the strips are used as sludge materials to enter the sludge conveying belt 3 of the drying box 1 from a sludge feeding hole.
The air outlet of the drying box 1 is provided with a temperature and humidity sensor, when the humidity of air at the outlet of the drying box 1 is detected to be larger than a set threshold value, for example, larger than 80%, the circulating fan 8 stops working, and all air volume is conveyed into the drying box 1 through the main fan 6. For better detection, a temperature and humidity sensor can be arranged at the outlet of the heat regenerator 11, the outlet of the water heat exchanger 15, the outlet of the evaporator 5 or the inlet of the first condenser 4 for further detection.
As shown in fig. 2, the structural principle of the heat pump system is illustrated. An oil-gas separator 21 is arranged at the air outlet end of the compressor 17, refrigerant forms a high-pressure high-temperature gas form in the compressor 17 and flows to the first condenser 4, heat exchange is carried out between the refrigerant and air in the first condenser 4, the temperature of the peripheral air is increased, and the main fan 6 brings high-temperature air into the drying box 1 to dry sludge materials; the refrigerant flowing out of the first condenser 4 flows to the evaporator 5 through a throttle valve in a low-temperature and low-pressure two-phase state, exchanges heat in the evaporator 5, is gasified, and enters the compressor again. The second condenser also heats the air, so that the heated air enters the circulating air channel again under the driving of the circulating fan. The air flowing out of the heat regenerator is cooled by the water heat exchanger, and then further cooled by heat release in the evaporator, and the refrigerant in the evaporator absorbs heat and is gasified, and enters the compressor 17 after passing through the gas-liquid separator 18. The refrigerant flowing out of the first condenser 4 and the second condenser passes through the filter drier 19 and flows to the evaporator 5.
The working principle of the device is as follows:
the heat pump thermal system and the drying box can adopt closed air circulation, and the sludge is extruded into strip-shaped sludge strips to fall on a sludge conveying belt below under the action of the slitter; the drying medium of the system is air, dry hot air enters the drying box under the action of the fan and contacts with sludge on the conveying belt, a microwave generator (namely a microwave assembly) above the sludge conveying belt starts to work, microwave radiation is carried out on sludge particles, moisture in the sludge starts to evaporate, the air is cooled and humidified to become damp hot air, the moisture in the sludge is taken away, the damp hot air enters the heat regenerator for precooling and is cooled by the evaporator of the heat pump to separate out condensate water to become dry cold air, and the dry cold air is cooled by the water heat exchanger before entering the evaporator; the dry and cold air enters the condenser to be heated into dry and hot air after being preheated by the heat regenerator, thus completing the cycle process.
Utilize refrigerating system to be used for the cooling of humid air in the drying cabinet, reduce waste gas moisture content, the latent heat of absorbing the moisture condensation in the waste gas simultaneously is used for reheating dry air, has effectively utilized the heat in the waste gas, has improved energy utilization efficiency. After the refrigerant at the heat pump side is compressed by the compressor, the temperature, pressure and other parameters of the refrigerant are all increased, partial heat is emitted and then enters the condenser, and meanwhile, the heat is emitted to the preheated dry and cold air. Then the refrigerant passes through a throttle valve, the throttling process is approximately equal in enthalpy, the refrigerant is changed into a low-temperature low-pressure two-phase state, then the low-temperature low-pressure two-phase state enters an evaporator, the heat of hot humid air is absorbed in the evaporator, the heat is gasified, and then the refrigerant is compressed by a compressor again to complete the circulation.
An air circulation channel is formed between the circulating air channel and the drying box, a filter, a second condenser and a circulating fan are installed on the air circulation channel, dust is filtered out through the filter, the air is heated through the second condenser, and the hot air is enabled to enter the circulation again under the driving of the circulating fan.
When the sludge drying device is applied to large-scale equipment, the drying box and the heat pump system are more preferably arranged in a left-right mode, and can be arranged in the front-back mode.
Although the embodiments have been described and illustrated separately, it will be apparent to those skilled in the art that some common techniques may be substituted and integrated between the embodiments, and reference may be made to one of the embodiments not explicitly described, or to another embodiment described.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (10)
1. A sludge drying device is characterized in that: the method comprises the following steps:
the drying box (1) is provided with a sludge feeding hole, a plurality of layers of sludge conveying belts (3) are arranged in the drying box, and sludge materials fall on the sludge conveying belts (3) from the sludge feeding hole;
The heat pump system (2) is communicated with the drying box (1), the heat pump system (2) comprises a compressor, a first condenser (4), an evaporator (5) and a main fan (6), the compressor, the condenser (4) and the evaporator (5) are connected through refrigerant pipelines, and the main fan (6) is communicated with the drying box (1);
the microwave assembly (10) is arranged in the drying box (1) or outside the drying box (1), and microwaves generated by the microwave assembly (10) are introduced into the drying box (1).
2. The sludge drying device of claim 1, wherein: the refrigerant forms a high-pressure high-temperature gas form in the compressor and flows to the first condenser (4), heat exchange is carried out between the refrigerant and air in the first condenser (4) to increase the temperature of peripheral air, and the main fan (6) brings high-temperature air into the drying box (1) to dry sludge materials; the refrigerant flowing out of the first condenser (4) flows to the evaporator (5) through a throttle valve in a low-temperature and low-pressure two-phase state, is subjected to heat exchange in the evaporator (5), is gasified, and enters the compressor again.
3. The sludge drying device of claim 1, wherein: the heat pump system further comprises a second condenser (7) and a circulating fan (8), the second condenser (7) is connected with the compressor and the evaporator (5), a circulating air pipeline (9) is arranged on the drying box (1), one end of the circulating air pipeline is communicated with the drying box (1), the other end of the circulating air pipeline (9) is communicated with the circulating fan (8), the circulating fan (8) is communicated with the drying box (1), and the second condenser (7) is communicated with the circulating fan (8) through air.
4. The sludge drying apparatus according to claim 1 or 3, wherein: the heat pump system further comprises a heat regenerator (11), the heat regenerator (11) is communicated with the drying box (1), part of humid hot air flowing out of the drying box and dry cold air flowing out of the evaporator (5) in a heat exchange mode are subjected to non-contact intersection heat exchange in the heat regenerator (11), part of humid hot air flowing out of the drying box (1) flows to the evaporator (5) after flowing out of the heat regenerator (11), and cold air flowing out of the evaporator (5) in a heat exchange mode flows to the first condenser (4) after flowing out of the heat regenerator (11).
5. The sludge drying device according to claim 4, wherein: and a filter (12) is arranged on the air inlet side of the circulating air pipeline, the filter (12) is arranged in front of the circulating condenser (7), and a part between the filter (12) and the circulating condenser (7) is communicated with the heat regenerator (11).
6. The sludge drying device of claim 1, wherein: the transmission directions of the upper layer and the lower layer of the multi-layer sludge conveying belt (3) are opposite, a receiving plate (13) is arranged between the tail end of the upper layer sludge conveying belt (3) and the starting end of the lower layer sludge conveying belt (3), and a blanking device (14) is arranged at the tail end of the lowest layer sludge conveying belt (3).
7. The sludge drying device according to claim 3, wherein: the sludge conveying belt (3) is made of non-metal materials.
8. The sludge drying device according to claim 4, wherein: the heat pump system further comprises a water heat exchanger (15), and the water heat exchanger (15) is arranged between the heat regenerator (12) and the evaporator (5).
9. The sludge drying device of claim 1, wherein: the sludge drying device further comprises a slitter (16), wherein the slitter (16) extrudes or cuts the sludge with the treatment into strips, and the strips are used as sludge materials to enter the sludge conveying belt (3) of the drying box (1) from the sludge feeding hole.
10. The sludge drying device of claim 1, wherein: an air outlet of the drying box (1) is provided with a temperature and humidity sensor, when the humidity of air at an outlet of the drying box (1) is detected to be larger than a set threshold value, the circulating fan (8) stops working, and all air volume is conveyed into the drying box (1) through the main fan (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910422214.0A CN111977938A (en) | 2019-05-21 | 2019-05-21 | Sludge drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910422214.0A CN111977938A (en) | 2019-05-21 | 2019-05-21 | Sludge drying device |
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| Publication Number | Publication Date |
|---|---|
| CN111977938A true CN111977938A (en) | 2020-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910422214.0A Pending CN111977938A (en) | 2019-05-21 | 2019-05-21 | Sludge drying device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747582A (en) * | 2020-12-31 | 2021-05-04 | 北京中矿博能节能科技有限公司 | Single-stage coal slime drying method |
| CN112747581A (en) * | 2020-12-31 | 2021-05-04 | 北京中矿博能节能科技有限公司 | Multistage multi-effect net chain closed coal slime drying system |
| CN112762663A (en) * | 2020-12-31 | 2021-05-07 | 北京中矿博能节能科技有限公司 | Single-stage multi-effect net chain closed type coal slime drying system |
| CN112762691A (en) * | 2020-12-31 | 2021-05-07 | 北京中矿博能节能科技有限公司 | Multistage coal slime drying method |
| CN113979614A (en) * | 2021-10-19 | 2022-01-28 | 南京韩测环境科技有限公司 | Explosion-proof low-energy-consumption low-temperature sludge drying and granulating process |
| CN114560616A (en) * | 2022-03-17 | 2022-05-31 | 江苏博一环保科技有限公司 | Heat pump type belt low-temperature sludge drying machine |
| CN115477457A (en) * | 2022-08-23 | 2022-12-16 | 杰瑞环保科技有限公司 | Sludge dryer and control method of sludge dryer |
| CN115925215A (en) * | 2022-11-18 | 2023-04-07 | 盐城市泉通环保设备有限公司 | Sludge treatment device and working method thereof |
| WO2023209032A1 (en) * | 2022-04-26 | 2023-11-02 | Meam Bv | Hybrid drying of industrial goods |
-
2019
- 2019-05-21 CN CN201910422214.0A patent/CN111977938A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747582A (en) * | 2020-12-31 | 2021-05-04 | 北京中矿博能节能科技有限公司 | Single-stage coal slime drying method |
| CN112747581A (en) * | 2020-12-31 | 2021-05-04 | 北京中矿博能节能科技有限公司 | Multistage multi-effect net chain closed coal slime drying system |
| CN112762663A (en) * | 2020-12-31 | 2021-05-07 | 北京中矿博能节能科技有限公司 | Single-stage multi-effect net chain closed type coal slime drying system |
| CN112762691A (en) * | 2020-12-31 | 2021-05-07 | 北京中矿博能节能科技有限公司 | Multistage coal slime drying method |
| CN113979614A (en) * | 2021-10-19 | 2022-01-28 | 南京韩测环境科技有限公司 | Explosion-proof low-energy-consumption low-temperature sludge drying and granulating process |
| CN114560616A (en) * | 2022-03-17 | 2022-05-31 | 江苏博一环保科技有限公司 | Heat pump type belt low-temperature sludge drying machine |
| WO2023209032A1 (en) * | 2022-04-26 | 2023-11-02 | Meam Bv | Hybrid drying of industrial goods |
| CN115477457A (en) * | 2022-08-23 | 2022-12-16 | 杰瑞环保科技有限公司 | Sludge dryer and control method of sludge dryer |
| CN115925215A (en) * | 2022-11-18 | 2023-04-07 | 盐城市泉通环保设备有限公司 | Sludge treatment device and working method thereof |
| CN115925215B (en) * | 2022-11-18 | 2023-09-12 | 盐城市泉通环保设备有限公司 | Sludge treatment device and working method thereof |
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