Pneumatic drying device for cellulose ether intermediate material
The airflow drying device, consisting of a cyclone separator, a bag filter, and a gas heater, solves the problem of long residence time of cellulose ether intermediate materials during transportation, achieving simultaneous drying and transportation, and improving production efficiency and equipment stability.
Patent Information
- Application Number
- CN202423301151.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing technologies, the intermediate cellulose ether materials have a long residence time during shaftless screw conveying and drying, resulting in low production efficiency.
The airflow drying device, consisting of a cyclone separator, a bag filter, and a gas heater, uses a high-temperature airflow to carry materials for simultaneous drying. It also utilizes a negative pressure fan and an expansion joint for stable conveying, and combines a temperature sensor to control the steam flow, thus achieving simultaneous drying and conveying.
The drying process is completed simultaneously during the conveying process, which improves the production efficiency of cellulose ethers, ensures the long-term normal operation of the equipment, and improves product quality.
Smart Images
Figure CN223678186U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of chemical industry especially relates to a cellulose ether intermediate material's airflow drying device. BACKGROUND
[0002] At present, the chemical enterprise utilizes the refined cotton as raw material, after the smashing, alkalescence, etherification, obtains the wet material through the filtration, the wet material is through centrifugal, pre -drying, obtains cellulose ether intermediate material, and the intermediate material is transported to the drying process through the shaftless screw again, and after being dried fully, it is sent to the intermediate bin for packing and obtains cellulose ether product.
[0003] This cellulose ether intermediate material needs to use the shaftless screw conveyor, and stays in the drying process and is dried, which causes the residence time of the intermediate material to be longer, and is not conducive to improving the production efficiency of the enterprise.
[0004] Therefore, how to design a device for improving the drying efficiency of cellulose ether intermediate material is a problem to be solved by those skilled in the art. SUMMARY
[0005] The utility model discloses a cellulose ether intermediate material's airflow drying device, and its simple structure, convenient maintenance, realizes the drying purpose in the process of conveying cellulose ether intermediate material, and effectively improves the production efficiency of cellulose ether.
[0006] The technical scheme of the utility model is: a cellulose ether intermediate material's airflow drying device, including cyclone separator, cloth bag dust collector, gas heater and negative pressure fan, the feed inlet of cyclone separator is connected with the downstream end of gas heater through the feed pipe line, the upstream end of gas heater is communicated with the atmosphere, the gas phase export of cyclone separator is connected with the feed inlet of cloth bag dust collector through the pipe line, and the discharge port of cyclone separator is connected with the intermediate bin through cyclone feeder and first pipe line, the exhaust cavity of cloth bag dust collector is connected with negative pressure fan, and the dust hopper bottom of cloth bag dust collector is provided with spiral feeder, the feed pipe line is provided with feed inlet, and is connected with cellulose ether intermediate material source through second pipe line.
[0007] The gas heater is a steam heater, the upstream end of the gas heater is provided with a gas filter, the heating medium passage inlet of the steam heater is connected with a low-pressure steam source, and a third valve is arranged, and the outlet of the heating medium passage is connected with a condensate collection pipe.
[0008] The cyclone feeder is connected with an instrument air source through a fourth pipe line, and a first valve is arranged.
[0009] The exhaust cavity of the cloth bag dust collector is connected with an instrument air source through a fifth pipe line, and a second valve is arranged.
[0010] The expansion joint is provided with a temperature sensor, and the temperature sensor is electrically connected with the third valve through the central control room.
[0011] The above technical scheme has the following beneficial effects:
[0012] 1. The air flow drying device for cellulose ether intermediate material comprises a cyclone separator, a bag dust collector, a gas heater, and a negative pressure fan. A feed inlet of the cyclone separator is connected with a downstream end of the gas heater through a feed pipeline, and an upstream end of the gas heater is communicated with the atmosphere, that is, the feed inlet of the cyclone separator is communicated with the atmosphere through the gas heater, and the air flow flowing into the cyclone separator is heated and warmed by the gas heater to form a high-temperature air flow. A gas phase outlet of the cyclone separator is connected with a feed inlet of the bag dust collector through a pipeline, and a discharge outlet of the cyclone separator supplies material to an intermediate bin through a cyclone feeder and a first pipeline. The material carried by the high-temperature air flow is fully dried in the conveying process, the dried material is intercepted in the cyclone separator, and is discharged to the intermediate bin through the cyclone feeder and the first pipeline. The moisture in the material forms water vapor, and is mixed with the crushed material powder in the high-temperature air flow and enters the bag dust collector. The water vapor and the material powder are intercepted by the bag dust collector. An exhaust cavity of the bag dust collector is connected with the negative pressure fan, and a screw feeder is arranged at the bottom of a dust hopper of the bag dust collector. A negative pressure air flow is formed by the negative pressure fan, so that the high-temperature air flow is discharged out of the cyclone separator, the bag dust collector, and the negative pressure fan. A feed inlet is arranged on the feed pipeline, and is connected with a cellulose ether intermediate material source through a second pipeline. The pre-dried cellulose ether intermediate material enters the feed pipeline through the second pipeline and the feed inlet, and is dispersed in the high-temperature air flow. In the flowing process, the moisture in the pre-dried cellulose ether intermediate material is evaporated to form water vapor, and the high-temperature air flow is gradually cooled. These mixtures (including the dried cellulose ether, the water vapor, and the gradually cooled high-temperature air flow) first enter the cyclone separator, the intercepted dried cellulose ether is sent to the intermediate bin through the cyclone feeder and the first pipeline, and is temporarily stored in the intermediate bin for packaging to obtain cellulose ether products. The drying process is completed synchronously in the conveying process, and the production efficiency of the cellulose ether can be effectively improved. The water vapor, the gradually cooled high-temperature air flow, and a small amount of cellulose ether powder passing through the cyclone separator enter the bag dust collector. The water vapor is cooled, combined with the cellulose ether powder to form droplets, and is intercepted by the bag dust collector. Finally, the water vapor is discharged through the screw feeder for recycling. The cooled air flow is discharged through the bag dust collector and the negative pressure fan. Since the humidity is low, corrosion of the negative pressure fan can be effectively avoided, and the negative pressure fan can work normally for a long time.
[0013] 2. The gas heater is a steam heater, and a gas filter is arranged at the upstream end of the gas heater to ensure the cleanliness of the high-temperature air flow, and further ensure the quality of the cellulose ether.
[0014] 3, cyclone feeder is connected with instrument air source through the fourth pipeline, and is provided with a first valve, which can be opened according to the need to import instrument air into the cyclone feeder, to ensure smooth feeding. The exhaust cavity of the bag-type dust collector is connected with the instrument air source through the fifth pipeline, and is provided with a second valve, which can be opened according to the need to import instrument air into the exhaust cavity of the bag-type dust collector, to blow the mixture (water + cellulose ether dust) attached to the surface of the bag of the exhaust cavity into the dust hopper of the bag-type dust collector through the screw feeder, and ensure the long-term normal work of the bag-type dust collector.
[0015] 4, the expansion joint is provided on the feed pipeline, the temperature sensor is arranged in the expansion joint, and the third valve is electrically connected with the central control room. The mixture entering the expansion joint is buffered and stabilized in the expansion joint, the working stability of the downstream cyclone separator is improved, the temperature sensor detects stable data, the opening of the third valve can be controlled according to the data, and the flow of low-pressure steam can be controlled.
[0016] The application will be further described below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a connection diagram of the utility model.
[0018] In the drawings, 1 is a cyclone separator, 2 is a bag-type dust collector, 3 is a gas heater, 4 is a negative pressure fan, 5 is a feed pipeline, 6 is a cyclone feeder, 7 is a first pipeline, 8 is a screw feeder, 9 is a feed inlet, 10 is a second pipeline, 11 is a gas filter, 12 is a fourth pipeline, 13 is a fifth pipeline, 14 is an expansion joint, 15 is a temperature sensor, a is a first valve, b is a second valve, and c is a third valve. DETAILED DESCRIPTION
[0019] In the utility model, all the instruments used are conventional instruments in the chemical field, and are installed or arranged according to the manufacturer's regulations.
[0020] Referring to Figure 1Embodiment of a kind of cellulose ether intermediate material's air flow drying device. Cellulose ether intermediate material's air flow drying device includes cyclone 1, cloth bag dust collector 2, gas heater 3 and negative pressure fan 4. The feed inlet of the cyclone 1 is connected with the downstream end of the gas heater 3 through the feed pipeline 5, and the upstream end of the gas heater 3 is communicated with the atmosphere. In the embodiment, the gas heater 3 is a steam heater, the upstream end of the gas heater 3 is provided with a gas filter 11, the inlet of the heating medium channel of the steam heater is connected with a low-pressure steam source, and a third valve c is arranged. The outlet of the heating medium channel is connected with a condensate collecting pipe. Specifically, the heating medium channel has multiple channels, one of which uses condensate as a heating medium to utilize the waste heat of the condensate. The third valve is an electromagnetic regulating valve. An expansion joint 14 is arranged on the feed pipeline, and a temperature sensor 15 is arranged in the expansion joint 14. The temperature sensor is electrically connected with the third valve through a central control room. According to the temperature data collected by the temperature sensor, the opening of the third valve is controlled. The gas phase outlet of the cyclone 1 is connected with the feed inlet of the cloth bag dust collector 2 through a pipeline, and the discharge port of the cyclone 1 is connected with the intermediate bin through a cyclone feeder 6 and a first pipeline 7. In the embodiment, the cyclone feeder 6 is connected with an instrument air source through a fourth pipeline 12, and a first valve a is arranged. The exhaust cavity of the cloth bag dust collector 2 is connected with the negative pressure fan 4. A screw feeder 8 is arranged at the bottom of the dust hopper of the cloth bag dust collector 2. In the embodiment, the exhaust cavity of the cloth bag dust collector 2 is connected with an instrument air source through a fifth pipeline 13, and a second valve b is arranged. A feed inlet 9 is arranged on the feed pipeline 5, and is connected with a cellulose ether intermediate material source through a second pipeline 10.
[0021] The working principle of the utility model is as follows: the negative pressure fan is started, low-pressure steam is introduced, and the flow of the low-pressure steam is adjusted according to the requirement, so that the high-temperature gas flowing in the system reaches the specified temperature range. The cellulose ether intermediate material pre-dried through the second pipeline and the feed inlet enters the feed pipeline, and is dispersed in the high-temperature gas flow. In the flowing process, the moisture in the pre-dried cellulose ether intermediate material is evaporated to form water vapor, and the high-temperature gas flow gradually cools down. These mixtures (including dried cellulose ether, water vapor, and high-temperature gas flow gradually cooling down) first enter the cyclone separator, the intercepted dried cellulose ether is sent to the intermediate bin through the cyclone feeder and the first pipeline, and the drying process is completed synchronously in the conveying process. The water vapor and the high-temperature gas flow gradually cooling down passing through the cyclone separator, and a small amount of cellulose ether powder enter the cloth bag dust collector. The water vapor therein is cooled down, combines with the cellulose ether powder to form droplets, and is intercepted by the cloth bag dust collector. Finally, it is discharged through the screw feeder for recycling, and the cooled gas flow is discharged through the cloth bag dust collector and the negative pressure fan.
Claims
1. An apparatus for pneumatic drying of a cellulose ether intermediate material, characterized in that: It comprises a cyclone separator (1), a bag filter (2), a gas heater (3), and a negative pressure fan (4), The feed inlet of the cyclone separator (1) is connected with the downstream end of the gas heater (3) through a feed pipeline (5), and the upstream end of the gas heater (3) is communicated with the atmosphere, The gas phase outlet of the cyclone separator (1) is connected with the feed inlet of the bag filter (2) through a pipeline, and the discharge port of the cyclone separator (1) supplies the intermediate bin through a cyclone feeder (6) and a first pipeline (7), The exhaust cavity of the bag filter (2) is connected with the negative pressure fan (4), and a screw feeder (8) is arranged at the bottom of the dust hopper of the bag filter (2), A feed inlet (9) is arranged on the feed pipeline (5), and the feed inlet (9) is connected with a cellulose ether intermediate material source through a second pipeline (10).
2. The apparatus for pneumatic drying of intermediate cellulosic ether material according to claim 1, characterized in that: The gas heater (3) is a steam heater, a gas filter (11) is arranged at the upstream end of the gas heater (3), the inlet of the heating medium channel of the steam heater is connected with a low-pressure steam source, a third valve (c) is arranged, and the outlet of the heating medium channel is connected with a condensate collecting pipe.
3. The apparatus for pneumatic drying of intermediate cellulosic ether material according to claim 1, characterized in that: The cyclone feeder (6) is connected with an instrument air source through a fourth pipeline (12), and a first valve (a) is arranged.
4. The apparatus for pneumatic drying of intermediate cellulosic ether material according to claim 1, characterized in that: The exhaust cavity of the bag filter (2) is connected with an instrument air source through a fifth pipeline (13), and a second valve (b) is arranged.
5. The apparatus for pneumatic drying of intermediate cellulosic ether material according to claim 2, characterized in that: An expansion joint (14) is arranged on the feed pipeline (5), a temperature sensor (15) is arranged in the expansion joint (14), and the temperature sensor (15) is electrically connected with the third valve (c) through a central control room.