CN110668672A - Sludge heat pump drying airflow optimization system - Google Patents
Sludge heat pump drying airflow optimization system Download PDFInfo
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- CN110668672A CN110668672A CN201911117571.2A CN201911117571A CN110668672A CN 110668672 A CN110668672 A CN 110668672A CN 201911117571 A CN201911117571 A CN 201911117571A CN 110668672 A CN110668672 A CN 110668672A
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- drying
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- 239000010802 sludge Substances 0.000 title claims abstract description 89
- 238000001035 drying Methods 0.000 title claims abstract description 74
- 238000005457 optimization Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 230000000694 effects Effects 0.000 claims abstract description 19
- 238000005192 partition Methods 0.000 claims description 17
- 239000011324 bead Substances 0.000 claims description 12
- 238000007664 blowing Methods 0.000 claims description 3
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000004457 water analysis Methods 0.000 description 1
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Classifications
-
- 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
The invention relates to the field of sludge drying, and discloses a sludge heat pump drying airflow optimization system which comprises a condensed water 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 supplying hot air and condensing and collecting water vapor in the wet air to the condensed water collecting device, the hot air is guided into the drying room through the air supply device to dry the sludge on the conveying chain belt, and the formed wet air flows back to the heat pump system through the upper air outlet; the wind speed of hot wind discharged by the air feeder is attenuated after flowing through the lower-layer chain belt, so that the flow speed of the upper-layer sludge drying airflow on the conveying chain belt is lower than that of the lower layer, the water content of the upper-layer sludge is higher than that of the lower layer, the water content is not matched with the wind speed, and the drying efficiency is lower; according to the invention, the diversion baffle plate assembly is arranged between the upper layer conveying chain belt and the lower layer conveying chain belt, so that the upper layer drying airflow is accelerated, and the mass transfer effect of the upper layer high-moisture content sludge is enhanced, therefore, the sludge drying efficiency is obviously improved 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 economic society of China, the yield 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 sludge yield in China in 2018 is 5665 million tons, GEPRESEAarch expects that the total sludge yield in China in 2020 reaches 6177 million tons, and the compound growth rate in the next three years is about 4 percent. The sludge has complex components, contains nutrient elements such as nitrogen, phosphorus, potassium and the like, has available components of organic matters, toxic and harmful refractory organic matters, heavy metals and pathogenic bacteria, has high water content, and is easy to be decomposed to cause stink. In order to realize the purposes of harmlessness and recycling of the sludge, the sludge needs to be dried.
The heat pump drying technology has the characteristic of high energy efficiency, and the heat pump system has high reliability and is widely applied to the field of sludge drying. However, the problem of low efficiency exists in the inside air supply of baking house, and the moisture content reduces gradually in the mud stoving process under the conveying mesh belt formula stoving mode, and the difference of the upper and lower layer mud moisture content of conveying mesh belt is not considered in the actual air supply, simply by increasing heat pump power can not effectively promote drying efficiency. Therefore, a heat pump drying airflow system based on the concept of step air supply needs to be designed.
Disclosure of Invention
The invention aims to provide a sludge heat pump drying airflow optimization system, which accords with the principle of cascade air supply, realizes the matching of the water content of sludge and the air speed, enhances the heat and mass transfer effect and reduces the energy consumption for drying sludge.
The purpose of the invention is realized as follows: a sludge heat pump drying airflow optimization system comprises a condensed 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;
the air supply equipment 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, receiving wet air generated by the drying room (17) and condensing the wet air, and realizing 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 diversion baffle plate assembly (9), a left side wind shield (14), an air outlet (12) and an air outlet pipeline (13), 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 and an air feeder (3) of the heat pump system (1), 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 diversion baffle plate assembly (9) is used for controlling the flow rate of air between sludge treatment devices, and the air outlet (12) and the air outlet pipeline (13) are used for connecting the drying room (17) and an air inlet of the;
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 can be 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 limitation of the invention: the conveying chain belt (8) is provided with two layers.
As a further limitation of the invention: left side deep bead (14) set up by upper conveying is taken (8) discharge end, and left side deep bead (14) when playing the hot-air guide effect, still play the effect that mud shifts to lower floor's conveying and is taken (8) by upper conveying is taken (8) and the effect of direction, mud outlet side deep bead (5) set up in lower floor's conveying is taken (8) discharge end below, other mud outlet baffle (6), and mud outlet side deep bead (5) when playing the hot-air guide effect, still play the mud discharge guide effect.
As a further limitation of the invention: the diversion baffle plate assembly (9) is arranged between two layers of conveying chain belts (8).
As a further limitation of the invention: the flow guide partition plate assembly (9) comprises a plurality of pairs of inclined partition plates which are symmetrical in a splayed shape, and every two adjacent pairs of inclined partition plates are connected through a horizontal partition plate.
As a further limitation of the invention, the bottom of the inclined clapboard is hinged on the side wall of the drying room (17), and the included angle of the inclined clapboard and the horizontal plane is 45 degrees ~ 60 degrees.
As a further limitation of the invention: the length of the inclined partition is twice that of the horizontal partition.
As a further limitation of the invention: the air outlet of the air feeder (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 (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 sludge outlet baffle is designed into a spring type, so that the air flow of the drying room is effectively prevented from leaking, and the pollution of harmful gas in the drying room to the environment is avoided.
2. The chain belt side baffles are arranged on the two sides of the transverse direction of the conveying chain belt, so that the sludge is prevented from falling to the ground of the drying room, equipment is prevented from being damaged, or the airflow resistance at the bottom is prevented from being increased.
3. According to the invention, aiming at the difference of the water content of the sludge in the upper layer and the lower layer of the conveying chain belt, the diversion baffle plate assembly is designed according to the step air supply concept, the air speed of the upper layer sludge drying air flow is improved, the mass transfer effect of the upper layer 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 airflow optimization system of the present invention.
FIG. 2 is a schematic diagram of the conveyor belt spacer plate assembly of the present invention showing different angles of inclination, lengths of the inclined spacer plates and lengths of the transverse spacer plates.
Fig. 3 is a cloud view of the drying air flow velocity field inside the drying room of the present invention.
Description of reference numerals: 1 heat pump system, 2 air inlet pipeline, 3 forced draught blower, 4 motors, 5 mud outlet side deep bead, 6 play mud mouth baffle, 7 chain belt side baffle, 8 conveying chain belt, 9 water conservancy diversion baffle subassemblies, 10 advance mud mouth, 11 baking house supports, 12 air outlets, 13 air-out pipelines, 14 left side deep bead, 15 condenser pipe, 16 water pitchers, 17 baking houses.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The system for optimizing the drying airflow of the sludge heat pump shown in the figure 1-2 comprises a condensed 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 equipment comprises an air feeder 3 and a motor 4 which are arranged at the bottom of the drying room 17, the air supply equipment is used for blowing hot air generated by the heat pump system 1 into the drying room, and an air outlet of the air feeder 3 faces to the right upper side;
the heat pump system 1 is used for generating hot air, receiving wet air generated by the drying room 17, condensing the wet air and realizing 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 diversion baffle plate assembly 9, a left side wind shield 14, an air outlet 12 and an air outlet pipeline 13, the air circulation system is used for realizing air circulation between the drying room 17 and the heat pump system 1, the air inlet pipeline 2 is connected with an air outlet of the heat pump system 1 and an air feeder 3, the sludge outlet side wind shield 5 and the left side wind shield 14 are used for realizing hot air guidance in the drying room 17, the diversion baffle plate assembly 9 is used for controlling the flow rate of air between the sludge treatment equipment, and the air outlet 12 and the air outlet pipeline 13 are used for connecting the drying room 17 and;
sludge treatment equipment is including advancing mud mouth 10, conveying chain belt 8, chain belt side shield 7, play mud mouth baffle 6, sludge treatment equipment is used for carrying mud, make mud and hot-air fully contact, realize drying, conveying chain belt 8 sets up at baking house 17 middle part, it is a spring baffle to go out mud mouth baffle 6, chain belt side shield 7 cooperatees with conveying chain belt 8, conveying chain belt 8 is provided with two-layerly, left side deep bead 14 sets up by 8 discharge ends of upper strata conveying company, left side deep bead 14 is when playing the hot-air guide effect, still play the effect that mud led when transferring to lower floor conveying company by 8 by upper strata conveying company, mud outlet side 5 sets up in 8 discharge ends of lower floor conveying company, it is by 6 to go out mud mouth baffle, mud outlet side 5 is when playing the hot-air guide effect, still play mud discharge guide effect, water conservancy diversion baffle subassembly 9 sets up between two-layer conveying company, including many pairs of slope baffles that are symmetry "eight" style of calligraphy in water conservancy diversion baffle subassembly 9, link to adjacent two pairs of slope baffles through horizontal baffle, slope baffle bottom 11 hinges at ~ 60 and baking house angle.
Referring to fig. 1, hot air at the outlet of a condenser in a heat pump system 1 is conveyed to a drying room 17 from the right upper side through a blower 3 driven by a motor 4 and is restrained by a left wind shield 14 and a sludge outlet side wind shield 5, the hot air is intensively blown to sludge on a conveying chain belt 8 from the bottom, so that moisture in the sludge is separated out through pores inside the sludge and is wrapped by the hot air and flows to the heat pump system 1 through an air outlet pipeline 13, an evaporator in the heat pump system 1 condenses and dehumidifies wet air, and condensed water is collected into a water tank 16 from a condensed water pipe 15.
The sludge treatment equipment is characterized in that sludge is guided in from a sludge inlet 10 and is conveyed by a conveying chain belt 8, internal water is diffused and evaporated into hot air, the water content gradually drops along the sludge conveying direction, and finally the sludge is conveyed to a sludge outlet baffle 6 to realize the recovery of dried sludge.
Considering that the required time of mud stoving is longer, conveying chain belt 8 divides two-layer down for mud is dried gradually and satisfies the recovery requirement, simultaneously, considering the flexibility of mud itself, easily falls to ground, causes the damage to the equipment of arranging subaerially, for conveying chain belt 8 cooperation chain belt side shield 7, effectively avoids mud to spill over through conveying chain belt 8 side.
A diversion baffle plate assembly 9 is arranged between the upper and lower conveying chain belts 8 in the air circulation system, as shown in figure 2, the baffles in the diversion baffle plate assembly 9 are in a symmetrical splayed shape, the length of the inclined baffle plate is 2L, the length of the horizontal baffle plate is L, and the diversion baffle plate assembly 9 is arranged to improve the speed of the upper drying air, so that the mass transfer amount of the upper high-water-content sludge is increased, namely the water analysis output amount, and the sludge drying efficiency is obviously improved.
Considering the drying condition change caused by the difference of the water content of the supplied sludge, the inclination angle of the partition plate is designed to be 45 degrees and ~ 60 degrees which can be adjusted, when the water content of the supplied sludge is lower, the inclination angle of the partition plate is correspondingly increased, the airflow resistance is reduced, when the water content of the supplied sludge is higher, the inclination angle of the partition plate is correspondingly reduced, the air speed of the drying airflow of the upper-layer sludge is further improved, and the mass transfer effect of the upper-layer sludge with high water content is enhanced.
In conclusion, the air circulation system is closed, and the sludge outlet baffle 6 is designed into a spring type, so that the air flow of the drying room 17 is effectively prevented from leaking, and the pollution of harmful gas in the drying room 17 to the environment is avoided; a chain belt side baffle 7 is arranged for the conveying chain belt 8, so that equipment damage caused by sludge overflowing from the side surface of the conveying chain belt 8 is effectively avoided; aiming at the difference of the water content of the sludge at the upper layer and the lower layer of the conveying chain belt 8, the diversion baffle plate component 9 is designed according to the step air supply concept, the air speed of the upper-layer sludge drying air flow is improved, the mass transfer effect of the upper-layer sludge with high water content is enhanced, and the sludge drying efficiency is obviously improved.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (10)
1. A sludge heat pump drying airflow optimization system is characterized by comprising a condensed 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;
the air supply equipment 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, receiving wet air generated by the drying room (17) and condensing the wet air, and realizing 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 diversion baffle plate assembly (9), a left side wind shield (14), an air outlet (12) and an air outlet pipeline (13), 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 and an air feeder (3) of the heat pump system (1), 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 diversion baffle plate assembly (9) is used for controlling the flow rate of air between sludge treatment devices, and the air outlet (12) and the air outlet pipeline (13) are used for connecting the drying room (17) and an air inlet of the;
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 can be fully contacted with hot air to realize drying, and the conveying chain belt (8) is arranged in the middle of a drying room (17).
2. The sludge heat pump drying airflow optimization system of claim 1, wherein: the conveying chain belt (8) is provided with two layers.
3. The sludge heat pump drying airflow optimization system of claim 2, wherein: left side deep bead (14) set up by upper conveying is taken (8) discharge end, and left side deep bead (14) when playing the hot-air guide effect, still play the effect that mud shifts to lower floor's conveying and is taken (8) by upper conveying is taken (8) and the effect of direction, mud outlet side deep bead (5) set up in lower floor's conveying is taken (8) discharge end below, other mud outlet baffle (6), and mud outlet side deep bead (5) when playing the hot-air guide effect, still play the mud discharge guide effect.
4. The sludge heat pump drying airflow optimization system of claim 2, wherein: the diversion baffle plate assembly (9) is arranged between two layers of conveying chain belts (8).
5. The sludge heat pump drying airflow optimization system according to claim 4, wherein: the flow guide partition plate assembly (9) comprises a plurality of pairs of inclined partition plates which are symmetrical in a splayed shape, and every two adjacent pairs of inclined partition plates are connected through a horizontal partition plate.
6. The system for optimizing the drying airflow of the sludge heat pump according to claim 5, wherein 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 degrees ~ 60 degrees.
7. The sludge heat pump drying airflow optimization system of claim 5, wherein: the length of the inclined partition is twice that of the horizontal partition.
8. The sludge heat pump drying airflow optimization system of claim 1, wherein: the air outlet of the air feeder (3) faces to the right upper side.
9. The sludge heat pump drying airflow optimization system of claim 1, wherein: the mud outlet baffle (6) is a spring baffle.
10. The sludge heat pump drying airflow optimization system of claim 1, wherein: the chain belt side baffle (7) is matched with the conveying chain belt (8).
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| CN201911117571.2A CN110668672A (en) | 2019-11-15 | 2019-11-15 | Sludge heat pump drying airflow optimization system |
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| CN201911117571.2A CN110668672A (en) | 2019-11-15 | 2019-11-15 | Sludge heat pump drying airflow optimization system |
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Cited By (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 | Sludge drying machine |
| CN115420066A (en) * | 2022-08-12 | 2022-12-02 | 农业农村部南京农业机械化研究所 | Double-layer vibration fluidized 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111453969A (en) * | 2020-05-13 | 2020-07-28 | 南京中盛宏信环保工程有限公司 | Sludge drying machine |
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