CN111268889A - Low-temperature vacuum dehydration drying method - Google Patents
Low-temperature vacuum dehydration drying method Download PDFInfo
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- CN111268889A CN111268889A CN202010130673.4A CN202010130673A CN111268889A CN 111268889 A CN111268889 A CN 111268889A CN 202010130673 A CN202010130673 A CN 202010130673A CN 111268889 A CN111268889 A CN 111268889A
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- filtering
- filter
- sludge
- plate
- heating
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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
-
- 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
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to the technical field of solid-liquid separation, in particular to a low-temperature vacuum dehydration drying method which is provided with a sludge conditioning system, a filtering system and a discharging system and comprises the following steps: conditioning sludge, filtering the sludge into a filter cake, heating a heating plate, vacuumizing to enable a filter chamber to be in negative pressure, dehydrating the filter cake, draining water and discharging; through setting up the good graphite alkene layer of heat conductivity at the hot plate, realize the purpose of heating to the straining chamber fast, ensure the homothermal state of straining chamber simultaneously, the setting up of evacuation subassembly makes and is in the negative pressure state in the straining chamber, reduces the boiling point of water, reaches the purpose that the filter cake further dewaters.
Description
Technical Field
The invention relates to the technical field of solid-liquid separation, in particular to a low-temperature vacuum dehydration drying method.
Background
The sludge treatment usually comprises primary filtration, diaphragm filter pressing and vacuum heat drying to remove water in the sludge, and aims to reduce the sludge amount to the maximum extent and facilitate subsequent processing and recovery of a dried filter cake.
Disclosure of Invention
In order to solve the problems of incomplete moisture removal and long moisture removal time in the sludge filtering and drying process in the prior art, the invention aims to provide a low-temperature vacuum dehydration drying method, which improves the dehydration rate of sludge, shortens the sludge filtering and drying time and improves the production efficiency.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a low-temperature vacuum dehydration drying method is provided with a sludge conditioning system, a filtering system and a discharging system, wherein the filtering system comprises at least one filtering plate and a heating plate, a filtering chamber is arranged between the filtering plate and the heating plate, a first feeding hole, a first water outlet and a first air suction opening are arranged on the filtering plate, a second feeding hole, a second water outlet and a second air suction opening are arranged on the heating plate, the first feeding hole and the second feeding hole are communicated with the filtering chamber, the first water outlet and the second water outlet are communicated with the filtering chamber, and the first air suction opening and the second air suction opening are communicated with the filtering chamber;
the filter system also comprises a filter pressing assembly, and the filter pressing assembly is connected with the filter plate;
the filtering system further comprises a vacuumizing assembly, and the vacuumizing assembly is connected with the first air suction opening and the second air suction opening;
the heating plate comprises a graphene layer and a first circulating heating element arranged on the graphene layer;
the method comprises the following steps:
step 1): inputting sludge to be treated into a sludge conditioning system;
step 2): the sludge conditioned by the sludge conditioning system enters the filter chamber from the first feeding hole and the second feeding hole;
step 3): starting the filter pressing assembly, and pressing sludge entering the filter chamber into a filter cake;
step 4): introducing an external heating medium into the first circulating heating element to heat the heating plate;
step 5): starting the vacuumizing assembly to keep negative pressure in the filter chamber;
step 6): discharging the filtrate generated in the step 5 through a first water outlet and a second water outlet;
step 7): stopping the vacuumizing assembly, refluxing the heat medium and discharging.
Further, the temperature in the filter chamber in the step 4 is kept between 70 and 80 degrees.
Further, the heating plate is provided with an inner ring piece and an outer ring piece, and the graphene layer is arranged on the inner ring piece.
Further, the filter plate is provided with a second circulation heating assembly.
The invention has the beneficial effects that: through setting up the good graphite alkene layer of heat conductivity at the hot plate, realize the purpose of heating to the straining chamber fast, ensure the homothermal state of straining chamber simultaneously, the setting up of evacuation subassembly makes and is in the negative pressure state in the straining chamber, reduces the boiling point of water, reaches the purpose that the filter cake further dewaters.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention;
FIG. 2 is a schematic diagram of the filter system of the present invention in a disassembled configuration;
FIG. 3 is a schematic diagram of a heating plate structure according to the present invention;
fig. 4 is a schematic cross-sectional view of a filtration system of the present invention.
The reference numerals include:
1-11-111-first feed inlet of filtration system-filter plate
112-first water outlet 113-first air suction opening 114-second circulation heating assembly
12-heating plate 1201-assembly two 1202-assembly three
121-second inlet 122-second outlet 123-second suction inlet
124-graphene layer 125-first circulation heating element
13-filter chamber 14-evacuation subassembly.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1 to 4, a low-temperature vacuum dehydration drying method of the present invention includes the following steps: the sludge conditioning system, the filtering system 1 and the discharging system, wherein the filtering system 1 comprises at least one filtering plate 11 and one heating plate 12, the filtering plate 11 is hinged to the heating plate 12, a filtering chamber 13 is formed after the filtering plate 11 and the heating plate 12 are attached, a first feeding hole 111, a first water outlet 112 and a first air suction opening 113 are arranged on the filtering plate 11, the heating plate 12 is provided with a second feeding hole 121, a second water outlet 122 and a second air suction opening 123, the first feeding hole 11 and the second feeding hole 121 are communicated with the filtering chamber 13, the first water outlet 112 and the second water outlet 122 are communicated with the filtering chamber 13, and the first air suction opening 113 and the second air suction opening 123 are communicated with the filtering chamber 13;
the filter system 2 further comprises a filter pressing assembly connected with the filter plate 21;
the filtering system 2 further comprises a vacuum pumping assembly 14, wherein the vacuum pumping assembly 14 is connected with the filtering chamber 13 through the first air pumping opening 113 and the second air pumping opening 123 and is communicated with the filtering chamber;
the heating plate 12 comprises a graphene layer 124 and a first circulation heating element 125 arranged on the graphene layer 124;
the processing steps are as follows:
the sludge material to be treated is sent into a sludge conditioning system, different flocculating agents are added according to the property of the sludge to be treated, the sludge to be treated and the flocculating agents are uniformly mixed through the sludge conditioning system, then the uniformly mixed sludge enters the filter chamber 13 through the first feed port 111 and the second feed port 121, the filter plate 11 comprises a substrate, a diaphragm and filter cloth, a diaphragm inner cavity is formed in the substrate, external compressed air enters the diaphragm inner cavity through a filter pressing component, the diaphragm is expanded to filter and dewater the sludge material, moisture in the sludge is discharged through the first water outlet 112 and the second water outlet 122, more sludge material is filter-pressed by the filter pressing component to form a compact filter cake, heating media such as hot water, hot oil and hot gas are introduced into the first circulating heating component 125, the heating plate 12 is heated, the graphene layer 124 is arranged, and the heating plate 12 has quick heat conduction, The heat preservation characteristic is that through heat transfer, the temperature in the filtering chamber 13 rises, the temperature of the filter cake rises, the vacuumizing assembly 14 is started at the same time, the vacuumizing assembly 14 is communicated with the first air suction opening 113 and the second air suction opening 123, so that the filtering chamber 13 is in a negative pressure state, the boiling point of water is reduced, the water and cell water in the filter cake are boiled and gasified after wall breaking, the water and the cell water are discharged from the first water outlet 112 and the second water outlet 122 and are periodically discharged into a sewage treatment system, tail gas is discharged after purification treatment, filter pressing and drying of the filter cake are further completed, and the water content of the filter cake is reduced.
Through setting up the graphite alkene layer 124 that the thermal conductivity is good at hot plate 12, realize the purpose of heating to filter chamber 13 fast, ensure filter chamber 13 homothermal state simultaneously, the setting of evacuation subassembly 14 makes and is in the negative pressure state in filter chamber 13, reduces the boiling point of water, reaches the purpose that the filter cake further dewaters.
Preferably, the temperature in the filter chamber is kept at 70 degrees to 80 degrees, the heating plate 12 is provided with an inner ring member 1201 and an outer ring member 1204, the inner ring member 1201 is made of an aluminum alloy plate, a graphene layer 124 is processed in the aluminum alloy plate, meanwhile, a first circulating heating member 125 is processed on the graphene layer 124, a heating medium is introduced into the first circulating heating member 125 to heat the heating plate 12, the graphene layer 124 has the characteristic of fast heat conduction, heat is rapidly transferred into the filter chamber through heat transfer, a filter cake is controlled within the range of 70 degrees to 80 degrees, meanwhile, the filter chamber is enabled to be at negative pressure through vacuumizing, the boiling point of water is reduced, and the purpose of dehydration is further achieved.
The filter plate 11 is provided with a second heating circulation assembly 114, and different heating media such as hot water, hot oil and hot gas are introduced according to actual production requirements, so that the filter chamber 13 is further ensured to be in a constant temperature state, the moisture in the filter cake is further removed, and the production efficiency is improved.
The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.
Claims (4)
1. A low-temperature vacuum dehydration drying method is characterized in that: the sludge conditioning system, the filtering system (1) and the discharging system are configured, the filtering system (1) comprises at least one filtering plate (11) and one heating plate (12), a filtering chamber (13) is arranged between the filtering plate (11) and the heating plate (12), a first feeding hole (111), a first water outlet (112) and a first air suction opening (113) are arranged on the filtering plate (11), the heating plate (12) is provided with a second feeding hole (121), a second water outlet (122) and a second air suction opening (123), the first feeding hole (111) and the second feeding hole (121) are communicated with the filtering chamber (13), the first water outlet (112) and the second water outlet (122) are communicated with the filtering chamber (13), and the first air suction opening (113) and the second air suction opening (123) are communicated with the filtering chamber (13);
the filter system (1) further comprises a filter pressing assembly, and the filter pressing assembly is connected with the filter plate (11);
the filtering system (1) further comprises a vacuum-pumping assembly (14), wherein the vacuum-pumping assembly (14) is connected with the first air-pumping opening (113) and the second air-pumping opening (123);
the heating plate (12) comprises a graphene layer (124) and a first circulating heating element (125) arranged on the graphene layer (124);
the method comprises the following steps:
1): inputting sludge to be treated into a sludge conditioning system;
2): the sludge conditioned by the sludge conditioning system enters the filter chamber (13) from the first feeding hole (111) and the second feeding hole (121);
3): starting the filter pressing assembly, and pressing sludge entering the filter chamber (13) into a filter cake;
4): introducing an external heating medium into the first circulating heating element (125) to heat the heating plate (12);
5): starting the vacuum-pumping assembly (14) to maintain negative pressure in the filtering chamber (13);
6): discharging the filtrate generated in the step 5 through a first water outlet (112) and a second water outlet (122);
7): and stopping the vacuum-pumping assembly (14), refluxing the heat medium, and discharging the filter cake.
2. The low-temperature vacuum dehydration drying method according to claim 1, characterized in that: the temperature in the filtering chamber (13) in the step 4 is kept between 70 and 80 degrees.
3. The low-temperature vacuum dehydration drying method according to claim 1, characterized in that: the heating plate (12) is provided with an inner ring piece (1201) and an outer ring piece (1202), and the graphene layer (124) is arranged on the inner ring piece (1201).
4. The low-temperature vacuum dehydration drying method according to claim 1, characterized in that: the filter plate (11) is provided with a second circulation heating assembly (114).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010130673.4A CN111268889A (en) | 2020-02-28 | 2020-02-28 | Low-temperature vacuum dehydration drying method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010130673.4A CN111268889A (en) | 2020-02-28 | 2020-02-28 | Low-temperature vacuum dehydration drying method |
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| Publication Number | Publication Date |
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| CN111268889A true CN111268889A (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010130673.4A Pending CN111268889A (en) | 2020-02-28 | 2020-02-28 | Low-temperature vacuum dehydration drying method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477706A (en) * | 2022-01-25 | 2022-05-13 | 青岛尚禹环保设备科技有限公司 | Flash evaporation mechanical filter pressing coupling vacuum sludge drying system and method |
| CN115806377A (en) * | 2023-02-07 | 2023-03-17 | 惠州市精田机械制造有限公司 | Efficient and environment-friendly sludge deep dehydration production line |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19843028A1 (en) * | 1998-08-26 | 2000-03-02 | Lenser Filtration Gmbh & Co | Drying system for accumulated filter cakes in a filter press has heat applied directly to the side of the filter cake away from the membrane to form a vapor layer to press out retained fluid under vacuum |
| CN103285637A (en) * | 2012-02-27 | 2013-09-11 | 上海复洁环保科技有限公司 | Low-temperature vacuum dehydration and drying equipment as well as process thereof |
| CN109179962A (en) * | 2018-11-01 | 2019-01-11 | 宁夏神耀科技有限责任公司 | The processing method and its system and device of coal gasification filter cake depth dehydration |
| CN109287013A (en) * | 2018-11-02 | 2019-01-29 | 张林利 | A kind of graphene heating plate |
-
2020
- 2020-02-28 CN CN202010130673.4A patent/CN111268889A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19843028A1 (en) * | 1998-08-26 | 2000-03-02 | Lenser Filtration Gmbh & Co | Drying system for accumulated filter cakes in a filter press has heat applied directly to the side of the filter cake away from the membrane to form a vapor layer to press out retained fluid under vacuum |
| CN103285637A (en) * | 2012-02-27 | 2013-09-11 | 上海复洁环保科技有限公司 | Low-temperature vacuum dehydration and drying equipment as well as process thereof |
| CN109179962A (en) * | 2018-11-01 | 2019-01-11 | 宁夏神耀科技有限责任公司 | The processing method and its system and device of coal gasification filter cake depth dehydration |
| CN109287013A (en) * | 2018-11-02 | 2019-01-29 | 张林利 | A kind of graphene heating plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114477706A (en) * | 2022-01-25 | 2022-05-13 | 青岛尚禹环保设备科技有限公司 | Flash evaporation mechanical filter pressing coupling vacuum sludge drying system and method |
| CN115806377A (en) * | 2023-02-07 | 2023-03-17 | 惠州市精田机械制造有限公司 | Efficient and environment-friendly sludge deep dehydration production line |
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Application publication date: 20200612 |