CN110793272A - Polyacrylamide drying system - Google Patents
Polyacrylamide drying system Download PDFInfo
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- CN110793272A CN110793272A CN201911124132.4A CN201911124132A CN110793272A CN 110793272 A CN110793272 A CN 110793272A CN 201911124132 A CN201911124132 A CN 201911124132A CN 110793272 A CN110793272 A CN 110793272A
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- fluidized drying
- drying bed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
- F26B3/08—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed
- F26B3/084—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried so as to loosen them, e.g. to form a fluidised bed with heat exchange taking place in the fluidised bed, e.g. combined direct and indirect heat exchange
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
- B01J2/20—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by expressing the material, e.g. through sieves and fragmenting the extruded length
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/08—Humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/22—Controlling the drying process in dependence on liquid content of solid materials or objects
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a polyacrylamide drying system, and relates to the technical field of polyacrylamide drying. The method comprises the following steps: a feeding port (201) of the extrusion granulator (2) is positioned under a discharge port (102) of the colloid bin (1), and the tail end of a grain discharge port (202) of the extrusion granulator (2) is sequentially connected with a plurality of fluidized drying beds; the bottom of the inner cavity of the fluidized drying bed is provided with a hot air box (7), and a ventilation plate (801) is arranged between the hot air box (7) and the fluidized drying bed; a plurality of baffles (803) with different heights are arranged at intervals in the left-right direction in the fluidized drying bed; a recycle line (805) is welded over the exterior of the fluidized drying bed. The beneficial technical effects are as follows: the small fluidized drying beds are used for drying in a grading manner, and the humidity value is set for each grade, so that the fluctuation range of the water content of the polyacrylamide material is greatly reduced; the baffle plate (803) is partitioned inside each fluidized drying bed, so that uniform and sufficient drying is facilitated; the circulating pipeline (805) can save the occupied area of equipment and ensure the drying effect.
Description
Technical Field
The invention relates to the technical field of polyacrylamide drying, in particular to a polyacrylamide drying system.
Background
Polyacrylamide is used as a lubricant, a suspending agent, a clay stabilizer, an oil displacement agent and a thickening agent, is widely applied to well drilling, acidification, fracturing, water plugging, well cementation, secondary oil recovery and tertiary oil recovery, and is an extremely important oilfield chemical.
Polyacrylamide is a linear high molecular polymer, and the product mainly comprises two forms of dry powder and colloid. Wherein, the production process of the polyacrylamide dry powder is approximately acrylamide + water (initiator/polymerization) → polyacrylamide gel block → granulation → drying → pulverization → polyacrylamide product. The synthesized polyacrylamide is colloidal, and after the polyacrylamide gel block is added into an extruder for extrusion granulation, the obtained polyacrylamide granules have high water content, generally over 75 percent, and need to be dried, and the water content of the polyacrylamide granules needs to be controlled within 10 percent.
At present, newly processed polyacrylamide granules are directly put into a large fluidized drying bed, hot air is introduced, and the polyacrylamide granules flow along with the hot air to be dried, so that the process of conveying and drying is realized, the fluctuation of the water content of the polyacrylamide granules at each section of the fluidized bed is large, the polyacrylamide granules are not easy to be sufficiently dried, and the drying effect of materials cannot be ensured.
Disclosure of Invention
The invention provides a polyacrylamide drying system, which solves the technical problems.
The concrete technical scheme is that a polyacrylamide drying system is characterized in that a feeding port of an extrusion granulator is positioned under a discharging port of a colloid bin for storing polyacrylamide gel blocks, and a plurality of fluidized drying beds are sequentially connected to the tail end of a grain discharging port of the extrusion granulator;
the interior of each fluidized drying bed is a hollow inner cavity for flowing the polyacrylamide granules and hot air, a hot air box for providing hot air is arranged at the bottom of the inner cavity, and a ventilation plate for circulating the hot air is arranged between the hot air box and the fluidized drying bed; a plurality of baffles are arranged in the fluidized drying bed at intervals in the left-right direction, the baffles are sequentially heightened from left to right, the bottoms of the baffles are clamped on a ventilating plate to divide the ventilating plate into a plurality of partitions, triangular-prism-shaped bevel blocks with right-angled triangle sections are respectively welded at the left lower corner of the first partition and the right lower corner of the last partition, and two surfaces of two right-angled sides on the section of each bevel block are respectively attached to two adjacent inner walls of the fluidized drying bed; the upper end of the fluidized drying bed is provided with a vent; a circulating pipeline is welded above the outside of the fluidized drying bed, and two ends of the circulating pipeline are respectively communicated with the hollow inner cavity of the fluidized drying bed to form a circulating passage; only when the water content of the material is reduced to a certain range, the material is blown high to cross the baffle plate, and the water content of the dried material in each partition area is in a small range; the material is avoided remaining in the corner department in the setting of bevel block.
A material regulating valve is arranged on the discharge hole; the blanking speed and whether blanking of the polyacrylamide rubber block can be controlled.
A humidity sensor is arranged in the middle of the last partition of each fluidized drying bed; valves are respectively arranged at two ends of each circulating pipeline, and the positions of the valves are close to the fluidized drying bed; a particle placing valve is arranged between two adjacent fluidized drying beds.
Further, a first fluidized drying bed, a second fluidized drying bed, a third fluidized drying bed and a fourth fluidized drying bed are sequentially connected to the tail end of the pellet discharge port of the extrusion granulator;
the inverted conical feed inlet is fixed above the first fluidized drying bed, the wind shielding inclined plate is positioned in the first fluidized drying bed, the wind shielding inclined plate connected with the right side wall of the feed inlet is inclined towards the lower left side, and a gap is reserved between the wind shielding inclined plate and the left inner wall of the first fluidized drying bed;
a first humidity sensor is arranged in the first fluidized drying bed, a second humidity sensor is arranged in the second fluidized drying bed, a third humidity sensor is arranged in the third fluidized drying bed, and a fourth humidity sensor is arranged in the fourth fluidized drying bed;
the first valve and the second valve are arranged on a circulating pipeline outside the first fluidized drying bed; the third valve and the fourth valve are arranged on a circulating pipeline outside the second fluidized drying bed; the fifth valve and the sixth valve are arranged on a circulating pipeline outside the third fluidized drying bed; the seventh valve and the eighth valve are arranged on a circulating pipeline outside the fourth fluidized drying bed;
the first fluidized drying bed is communicated with the second fluidized drying bed through a first conveying pipeline, and a first grain discharging valve is arranged on the first conveying pipeline;
the second fluidized drying bed is communicated with the third fluidized drying bed through a second conveying pipeline, and a second grain discharging valve is arranged on the second conveying pipeline;
the third fluidized drying bed is communicated with the fourth fluidized drying bed through a third conveying pipeline, and a third grain discharging valve is installed on the third conveying pipeline;
a fourth conveying pipeline communicated with the hollow inner cavity of the fourth fluidized drying bed is arranged on the right side of the fourth fluidized drying bed, and a fourth grain discharging valve is arranged on the fourth conveying pipeline.
The material regulating valve is opened, the polyacrylamide rubber block falls into the extrusion granulator from the rubber material bin, the granules enter the first fluidized drying bed from the granule discharge port through the feed inlet, hot air is blown from bottom to top, the materials fall from top to bottom when being blocked by the wind shielding inclined plate, and the hot air cannot be blown from bottom to top at the position, so that the material back blowing is avoided. After the materials are dried by hot air in the first fluidized drying bed, the materials are blown by the hot air to be higher than the baffle plate, flow from left to right and flow to the last partition in the first fluidized drying bed, the first humidity sensor detects the humidity of the materials, the humidity is lower than a set value, the first pellet discharge valve can be opened, and the materials enter the second fluidized drying bed; if the detected humidity of the material is higher than a set value, closing the material regulating valve and the first pellet releasing valve, opening the first valve and the second valve, feeding the material into a circulation pipeline outside the first fluidized drying bed under the blowing of hot air, and performing hot air drying on the first fluidized drying bed again until the water content is lower than the set value, so that the material can not enter the second fluidized drying bed, and opening the material regulating valve to continue to extrude and granulate when all the material in the first fluidized drying bed enters the second fluidized drying bed; the material leaving the first fluidized drying bed is subjected to a hot air drying process in the first fluidized drying bed again in the second fluidized drying bed, the third fluidized drying bed and the fourth fluidized drying bed, with the difference that the set values for the humidity in the first fluidized drying bed, the second fluidized drying bed, the third fluidized drying bed and the fourth fluidized drying bed are successively lowered; and when the humidity of the material is lower than the set value in the fourth fluidized drying bed, opening a fourth grain discharging valve, and hermetically packaging the material.
When the humidity of the material detected for the first time in each fluidized drying bed is higher than a set value, the material adjusting valve can be adjusted to be small during subsequent operation, so that the material amount entering the first fluidized drying bed each time is reduced, and the drying speed and the drying effect are improved; when the material humidity detected for the first time in each fluidized drying bed is lower than a set value, the material adjusting valve is enlarged, and the hot air drying utilization rate is improved.
The arrangement of the circulating pipeline is equivalent to the extension of a drying path, so that the occupied area of equipment can be saved, and the drying effect is ensured. For the drying of the same batch of materials, when a circulation pipeline is used for 1-2 times in each fluidized drying bed, the drying effect and the quality of polyacrylamide are improved.
The invention has the beneficial technical effects that: a plurality of small fluidized drying beds are arranged for carrying out stage drying, the humidity value of each stage is set, and the next fluidized drying bed can be entered only when the humidity value is lower than the set value of the previous fluidized drying bed, so that the fluctuation range of the water content of the polyacrylamide material is greatly reduced, and the drying effect is favorably controlled; the arrangement of the baffle plate is divided into zones in each fluidized drying bed, so that uniform and sufficient drying is realized; the arrangement of the circulating pipeline can save the occupied area of equipment and ensure the drying effect.
Drawings
FIG. 1 is a schematic illustration of the present invention in one embodiment;
FIG. 2 is a schematic illustration of a first fluidized dryer bed in one embodiment;
FIG. 3 is a schematic view of a second fluidized dryer bed in one embodiment.
Description of reference numerals:
1. the device comprises a colloid bin, 2, an extrusion granulator, 3, a first fluidized drying bed, 4, a second fluidized drying bed, 5, a third fluidized drying bed, 6, a fourth fluidized drying bed, 7 and a hot air box;
101. a material regulating valve 102 and a discharge hole;
201. a feed inlet, 202, a grain discharge port;
301. the device comprises a first humidity sensor 302, a first conveying pipeline 303, a first grain discharging valve 304, a first valve 305, a second valve 306, a feeding hole 307 and a wind shielding inclined plate;
401. a second humidity sensor 402, a second conveying pipeline 403, a second pellet discharging valve 404, a third valve 405 and a fourth valve;
501. a third humidity sensor 502, a third conveying pipeline 503, a third grain discharging valve 504, a fifth valve 505 and a sixth valve;
601. a fourth humidity sensor 602, a fourth conveying pipeline 603, a fourth pellet discharging valve 604, a seventh valve 605 and an eighth valve;
801. ventilation board, 802, ventilation opening, 803, baffle, 804, bevel block, 805, circulation pipeline.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings and examples:
it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and all modifications of the structures, changes in the proportions and adjustments of the sizes and other dimensions which are within the scope of the disclosure should be understood and encompassed by the present disclosure without affecting the efficacy and attainment of the same.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example (b):
referring to fig. 1-3, in a polyacrylamide drying system, a feed port 201 of an extrusion granulator 2 is positioned right below a discharge port 102 of a colloid bunker 1 for storing polyacrylamide gel blocks, and a first fluidized drying bed 3, a second fluidized drying bed 4, a third fluidized drying bed 5 and a fourth fluidized drying bed 6 are sequentially connected to the tail end of a discharge port 202 of the extrusion granulator 2; the third fluidized drying bed 5 and the fourth fluidized drying bed 6 are identical in structure to the second fluidized drying bed 4.
A first humidity sensor 301 is installed in the first fluidized drying bed 3, an inverted conical feed inlet 306 is fixed above the first fluidized drying bed 3, a wind shielding inclined plate 307 is positioned in the first fluidized drying bed 3, the wind shielding inclined plate 307 connected with the right side wall of the feed inlet 306 at the upper part inclines towards the lower left, and a gap is reserved between the wind shielding inclined plate 307 and the left inner wall of the first fluidized drying bed 3; the material outlet 102 is provided with a material regulating valve 101.
A second humidity sensor 401 is arranged in the second fluidized drying bed 4, a third humidity sensor 501 is arranged in the third fluidized drying bed 5, and a fourth humidity sensor 601 is arranged in the fourth fluidized drying bed 6;
the first valve 304 and the second valve 305 are installed on the circulation line 805 outside the first fluidized drying bed 3; the third valve 404 and the fourth valve 405 are installed on the circulation line 805 outside the second fluidized drying bed 4; the fifth valve 504 and the sixth valve 505 are installed on the circulation line 805 outside the third fluidized drying bed 5; the seventh valve 604 and the eighth valve 605 are installed on the circulation line 805 outside the fourth fluidized drying bed 6;
the first fluidized drying bed 3 and the second fluidized drying bed 4 are communicated by a first conveying pipeline 302, and a first grain discharging valve 303 is arranged on the first conveying pipeline 302;
the second fluidized drying bed 4 and the third fluidized drying bed 5 are communicated by a second conveying pipeline 402, and a second grain discharging valve 403 is arranged on the second conveying pipeline 402;
the third fluidized drying bed 5 and the fourth fluidized drying bed 6 are communicated by a third conveying pipeline 502, and a third grain discharging valve 503 is arranged on the third conveying pipeline 502;
a fourth conveying pipeline 602 communicated with the hollow cavity of the fourth fluidized drying bed 6 is arranged at the right side of the fourth fluidized drying bed 6, and a fourth grain discharging valve 603 is arranged on the fourth conveying pipeline 602.
The interior of each fluidized drying bed is a hollow inner cavity for allowing the polyacrylamide granules and hot air to flow, a hot air box 7 for providing hot air is arranged at the bottom of the inner cavity, and a ventilation plate 801 for hot air circulation is arranged between the hot air box 7 and the fluidized drying bed; three baffles 803 are arranged in the fluidized drying bed, the baffles 803 are sequentially heightened from left to right, the bottoms of the baffles 803 are clamped on the ventilating plate 801 to divide the ventilating plate 801 into a plurality of partitions, triangular-prism-shaped bevel blocks 804 with right-angled triangular sections are respectively welded at the left lower corner of the first partition and the right lower corner of the last partition, and two surfaces of two right-angled sides on the section of each bevel block 804 are respectively attached to two adjacent inner walls of the fluidized drying bed; the upper end of the fluidized drying bed is provided with a vent 802; and a circulating pipeline 805 is welded above the outside of the fluidized drying bed, and two ends of the circulating pipeline 805 are respectively communicated with the hollow inner cavity of the fluidized drying bed to form a circulating passage.
The material regulating valve 101 is opened, the polyacrylamide rubber block falls into the extrusion granulator 2 from the rubber material bin 1, the granules enter the first fluidized drying bed 3 from the granule discharge port 202 through the feed port 306, hot air blows from bottom to top and is blocked when meeting the wind blocking plate 307, the materials fall from top to bottom, and the hot air does not blow from bottom to top at the position, so that the material blowback is avoided. After the entering materials are dried by hot air in the first fluidized drying bed 3, the entering materials are blown by the hot air to be higher than the baffle 803, flow from left to right, and flow to the last partition in the first fluidized drying bed 3, the first humidity sensor 301 detects the humidity of the materials, when the humidity is lower than a set value, the first pellet discharge valve 303 can be opened, and the materials enter the second fluidized drying bed 4; if the detected humidity of the material is higher than the set value, closing the material regulating valve 101 and the first pellet releasing valve 303, opening the first valve 304 and the second valve 305, feeding the material onto a circulating pipeline 805 outside the first fluidized drying bed 3 under the blowing of hot air, and performing hot air drying on the first fluidized drying bed 3 again until the water content is lower than the set value, so that the material can not enter the second fluidized drying bed 4, and when all the material in the first fluidized drying bed 3 enters the second fluidized drying bed 4, opening the material regulating valve 101 to continue extrusion and granulation; the material leaving the first fluidized drying bed 3 is subjected to the hot air drying process in the first fluidized drying bed 3 again in the second fluidized drying bed 4, the third fluidized drying bed 5 and the fourth fluidized drying bed 6, with the difference that the set values for the humidity in the first fluidized drying bed 3, the second fluidized drying bed 4, the third fluidized drying bed 5 and the fourth fluidized drying bed 6 are successively lower; when the moisture content of the material is lower than the set value in the fourth fluidized drying bed 6, the fourth pellet discharge valve 603 is opened and sealed and packaged.
The polyacrylamide granules from the extrusion granulator 2 have large water content, generally over 75 percent, and are easy to dry at the beginning, so that the water content is reduced quickly; when the water content of the polyacrylamide granules is reduced, the drying is not easy to carry out, and the reduction range of the water content is slowed. That is, a humidity value of 50% may be set at the first fluidized drying bed 3, a humidity value of 30% may be set at the second fluidized drying bed 4, a humidity value of 20% may be set at the third fluidized drying bed 5, and a humidity value of 10% may be set at the fourth fluidized drying bed 6.
The arrangement of the circulating pipeline 805 is equivalent to prolonging the drying path, so that the occupied area of equipment can be saved, and the drying effect is ensured. For the drying of the same batch, the use of the circulation pipeline 805 for 1-2 times in each fluidized drying bed is beneficial to the improvement of the drying effect and the quality of the polyacrylamide.
When the humidity of the material detected for the first time in each fluidized drying bed is higher than the set value, the material adjusting valve 101 can be adjusted to be small during the subsequent operation, so that the material amount entering the first fluidized drying bed 3 every time is reduced, and the drying speed and the drying effect are improved; when the material humidity detected for the first time in each fluidized drying bed is lower than the set value, the material adjusting valve 101 is enlarged, and the hot air drying utilization rate is improved.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (2)
1. A polyacrylamide drying system is characterized in that,
a feeding port (201) of the extrusion granulator (2) is positioned under a discharging port (102) of a colloid storage bin (1) for storing polyacrylamide gel blocks, and the tail end of a particle discharging port (202) of the extrusion granulator (2) is sequentially connected with a plurality of fluidized drying beds;
the interior of each fluidized drying bed is a hollow inner cavity for allowing the polyacrylamide granules and hot air to flow, a hot air box (7) for providing hot air is arranged at the bottom of the inner cavity, and a ventilation plate (801) for circulating the hot air is arranged between the hot air box (7) and the fluidized drying bed; a plurality of baffles (803) are arranged in the fluidized drying bed at intervals in the left-right direction, the baffles (803) are sequentially heightened from left to right, the bottoms of the baffles (803) are clamped on a ventilating plate (801) to divide the ventilating plate (801) into a plurality of partitions, triangular-prism-shaped bevel blocks (804) with right-angled triangle sections are respectively welded at the left lower corner of the first partition and the right lower corner of the last partition, and two surfaces of two right-angled sides on the section of each bevel block (804) are respectively attached to two adjacent inner walls of the fluidized drying bed; the upper end of the fluidized drying bed is provided with a vent (802); a circulating pipeline (805) is welded above the outside of the fluidized drying bed, and two ends of the circulating pipeline (805) are respectively communicated with the hollow inner cavity of the fluidized drying bed to form a circulating passage;
a material regulating valve (101) is arranged on the discharge hole (102);
a humidity sensor is arranged in the middle of the last partition of each fluidized drying bed; valves are respectively arranged at two ends of each circulating pipeline (805), and the positions of the valves are close to the fluidized drying bed; a particle placing valve is arranged between two adjacent fluidized drying beds.
2. The polyacrylamide drying system according to claim 1,
the tail end of a grain discharging port (202) of the extrusion granulator (2) is sequentially connected with a first fluidized drying bed (3), a second fluidized drying bed (4), a third fluidized drying bed (5) and a fourth fluidized drying bed (6);
the inverted conical feed inlet (306) is fixed above the first fluidized drying bed (3), the wind shielding inclined plate (307) is positioned in the first fluidized drying bed (3), the wind shielding inclined plate (307) which is connected with the right side wall of the feed inlet (306) at the upper part inclines towards the lower left, and a gap is reserved between the wind shielding inclined plate (307) and the left inner wall of the first fluidized drying bed (3);
a first humidity sensor (301) is arranged in the first fluidized drying bed (3), a second humidity sensor (401) is arranged in the second fluidized drying bed (4), a third humidity sensor (501) is arranged in the third fluidized drying bed (5), and a fourth humidity sensor (601) is arranged in the fourth fluidized drying bed (6);
the first valve (304) and the second valve (305) are arranged on a circulating pipeline (805) outside the first fluidized drying bed (3); the third valve (404) and the fourth valve (405) are arranged on a circulating pipeline (805) outside the second fluidized drying bed (4); a fifth valve (504) and a sixth valve (505) are arranged on a circulating pipeline (805) outside the third fluidized drying bed (5); a seventh valve (604) and an eighth valve (605) are installed on the circulation line (805) outside the fourth fluidized drying bed (6);
the first fluidized drying bed (3) is communicated with the second fluidized drying bed (4) through a first conveying pipeline (302), and a first grain discharging valve (303) is arranged on the first conveying pipeline (302);
the second fluidized drying bed (4) is communicated with the third fluidized drying bed (5) through a second conveying pipeline (402), and a second grain discharging valve (403) is installed on the second conveying pipeline (402);
the third fluidized drying bed (5) is communicated with the fourth fluidized drying bed (6) through a third conveying pipeline (502), and a third grain discharging valve (503) is installed on the third conveying pipeline (502);
a fourth conveying pipeline (602) communicated with the hollow cavity of the fourth fluidized drying bed (6) is arranged on the right side of the fourth fluidized drying bed, and a fourth pellet discharge valve (603) is arranged on the fourth conveying pipeline (602).
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|---|---|---|---|
| CN201911124132.4A CN110793272A (en) | 2019-11-18 | 2019-11-18 | Polyacrylamide drying system |
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| CN201911124132.4A CN110793272A (en) | 2019-11-18 | 2019-11-18 | Polyacrylamide drying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111780496A (en) * | 2020-05-29 | 2020-10-16 | 浙江工业大学 | Vitamin D3Spray granulation drying combined device in microcapsule production |
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| CN204678804U (en) * | 2015-06-08 | 2015-09-30 | 宁波大学 | A kind of dry materials fluidized bed plant of waste heat recovery |
| CN204854164U (en) * | 2015-07-10 | 2015-12-09 | 无锡商业职业技术学院 | Novel multiport ebullated bed desicator |
| JP2017058036A (en) * | 2015-09-14 | 2017-03-23 | 株式会社Ihi | Dehydration system |
| CN205820898U (en) * | 2016-05-20 | 2016-12-21 | 广汉雅和化工有限公司 | The exsiccator produced for LITHIUM BATTERY ammonium dihydrogen phosphate |
| JP2018069201A (en) * | 2016-11-04 | 2018-05-10 | 株式会社Ihi | Fluid bed system |
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| CN111780496A (en) * | 2020-05-29 | 2020-10-16 | 浙江工业大学 | Vitamin D3Spray granulation drying combined device in microcapsule production |
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