CN213631193U - Moisture absorption device is prevented to cellulose ether transportation process - Google Patents
Moisture absorption device is prevented to cellulose ether transportation process Download PDFInfo
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- CN213631193U CN213631193U CN202022766781.9U CN202022766781U CN213631193U CN 213631193 U CN213631193 U CN 213631193U CN 202022766781 U CN202022766781 U CN 202022766781U CN 213631193 U CN213631193 U CN 213631193U
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Abstract
The utility model belongs to the technical field of meticulous chemical production equipment and specifically relates to an effectively avoid cellulose ether to absorb moisture in transportation process, the lower cellulose ether transportation process of equipment simple, required energy consumption prevents moisture absorption device simultaneously, include and the air intake between the material collecting device through the pipeline intercommunication, including feeder, pipeline between material collecting device and the air intake and feeder's discharge gate intercommunication are provided with air heating device on the pipeline of air intake department. In the whole process, the air that the material contacted all is the air of low water content, consequently, also great reduction the material because absorb moisture in the air and lead to the product water content to exceed the specified value, lead to the unqualified condition of product. The device is particularly suitable for conveying non-heat-sensitive powder materials represented by cellulose ether.
Description
Technical Field
The utility model belongs to the technical field of meticulous chemical production equipment and specifically relates to a moisture absorption device is prevented to cellulose ether transportation process.
Background
Cellulose ether is a generic name of a series of cellulose derivatives generated by the reaction of cellulose and an etherifying agent under certain conditions, and is a product in which hydroxyl groups on cellulose molecules are partially or completely substituted by ether groups. The cellulose ether is a cellulose derivative with wide application field, large production capacity and high research value, and the application of the cellulose ether relates to the fields of industry, agriculture, daily chemical industry, environmental protection, aerospace and national defense.
The cellulose ether production process generally comprises the working procedures of fine cotton crushing, etherification reaction, refining and purification, crushing, packaging and the like. The product crushing and conveying process generally uses air as a conveying carrier to carry out dilute phase conveying. Cellulose ether is prone to absorb moisture in air, and the moisture content of the product can exceed a specified value due to moisture absorption in the air during crushing and conveying of the product, so that the product is unqualified, particularly in humid and stuffy environments. The common moisture absorption prevention technology in the cellulose ether production process is to perform constant temperature and humidity control on air for conveying or the whole production workshop, namely, the central air conditioner is used for adjusting the temperature and the humidity of the air for conveying or the ambient air of the production workshop and reducing the relative humidity of the air to a lower level, thereby preventing the cellulose ether from absorbing moisture in the production and conveying processes. The method can effectively avoid the moisture absorption of the cellulose ether, but the energy consumption for refrigeration and dehumidification of the central air conditioner is higher in seasons with higher air temperature and humidity due to the large air quantity required in the cellulose conveying process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a cellulose ether is effectively avoided absorbing moisture in transportation process is provided, and the moisture absorption device is prevented to the lower cellulose ether transportation process of equipment simple, required energy consumption simultaneously.
The utility model provides a technical scheme that its technical problem adopted is: moisture absorption device is prevented to cellulose ether transportation process includes and the air intake between the material collecting device through the pipeline intercommunication, including feeder, pipeline and feeder's discharge gate intercommunication between material collecting device and the air intake is provided with air heating device on the pipeline of air intake department.
Further, the temperature detection device is included, one end of the temperature detection device is connected with the air heating device, and the other end of the temperature detection device is connected with an air outlet of the air heating device.
Further, the temperature detection device is a thermometer.
Further, an air filter is arranged between the air inlet and the air heating device.
Further, the air filter is a primary air filter with porous filter material.
Further, a feeding air shutter is arranged at the discharge port of the feeding device.
Further, a discharging air shutter is arranged at the discharging port of the material receiving device.
Further, including the draught fan, the draught fan communicates with the material collecting device.
Further, the air heating device is a finned steam heater or an electric heater.
Further, the feeding device is a crusher or a sieving machine.
The utility model has the advantages that: the utility model discloses an improve cellulose ether material transportation process and carry the air temperature, reduce its relative humidity to avoid the moisture in the cellulose ether absorbed air and the condition of moisture superelevation appears. The specific process is as follows: the air that the air intake was inputed at first heats through air heating device to greatly reduced water content in the air, afterwards, the air mixes and carries to save in the material collecting device with the material of feed device's discharge gate output. Because in the whole process, the air that the material contacted all is the air of low water content, consequently, also great reduction the material because absorb moisture in the air and lead to the product water content to exceed the specified value, lead to the unqualified condition of product. The device is particularly suitable for conveying non-heat-sensitive powder materials represented by cellulose ether.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Labeled as: the air filter comprises an air filter 1, an air inlet 11, an air conveying direction 12, an air heating device 2, a temperature detection device 3, a feeding device 4, a feeding air-lock valve 5, a material receiving device 6, a discharging air-lock valve 7 and an induced draft fan 8.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The cellulose ether conveying process moisture absorption preventing device shown in fig. 1 comprises a material receiving device 6 communicated with an air inlet 11 through a pipeline, and comprises a feeding device 4, the pipeline between the material receiving device 6 and the air inlet 11 is communicated with a discharge hole of the feeding device 4, and an air heating device 2 is arranged on the pipeline at the air inlet 11.
In order to detect the temperature of the heated air in real time, thereby timely controlling the air heating device 2 and better ensuring the temperature, the air conditioner preferably comprises a temperature detection device 3, one end of the temperature detection device 3 is connected with the air heating device 2, and the other end is connected with the air outlet of the air heating device 2. The temperature detection device 3 detects the temperature output by the air outlet of the air heating device 2 in time, so that the temperature detection device 3 is adjusted, and the running stability is ensured. It is generally preferred that the temperature detection means 3 is a thermometer. The temperature value measured by the thermometer 3 is a key value for determining whether the material can effectively prevent moisture absorption and is also a basis for adjusting the heating quantity of the air heater 2, so that the thermometer 3 is suitable for using two independent thermometers, an average value is taken as an output value, and meanwhile, when the deviation of the temperature values measured by the two independent thermometers exceeds the normal error range of the thermometer measurement, the system should give an alarm and the thermometer needs to be checked or replaced for use.
In order to filter out impurities in the input air, an air filter 1 is preferably arranged between the air inlet 11 and the air heating device 2. In practical use, the type of the air filter and the selection of the filtering parameters can be determined according to the requirements of the production process, and in the production of cellulose ether, a primary air filter of porous filtering material is usually selected, so that dust particles with the particle size of more than or equal to 5 mu m can be removed, and the primary resistance is less than or equal to 50 Pa.
In order to control the opening and closing of the discharge port of the feeding device 4, a feeding air-lock valve 5 is preferably arranged at the discharge port of the feeding device 4. The feeding air-lock valve 5 is used for stably conveying the materials in the feeding device 4 into the device, and simultaneously preventing the feeding source 4 and air outside the device from entering the device, and the frequency of the air-lock valve 5 can be preferably adjusted.
Similarly, preferably, a discharging air-lock valve 7 is arranged at the discharging port of the material receiving device 6. The material receiving device 6 is used for collecting materials and separating the materials from gas, can be a storage bin or an air flow mixer, the bottom of the material receiving device is preferably provided with a space for storing the materials, the upper part of the material receiving device is preferably provided with a filtering device for separating the materials from the air, the filtering device is preferably provided with a bag-type dust collector in the production process of cellulose ether, the aperture of the bag-type dust collector is selected according to the particle size of the materials, and the air permeability of the bag-type dust collector is determined by the air volume of. The materials conveyed into the device from the feeding device 4 are conveyed to the material receiving device 6 along the pipeline, the materials are settled at the bottom of the material receiving device 6, and the gas is filtered by the filtering device at the upper part of the material receiving device 6 and then enters the induced draft fan 8 to be discharged. The function of the discharging air shutter 7 is to uniformly and stably convey the materials in the material receiving device 6 out, and the materials usually enter a mixer or a packaging machine.
Preferably including draught fan 8, draught fan 8 is entire system's power supply with 6 intercommunication draught fan 8 of material collecting device, drives the material and carries out the dilute phase and carry when carrying air.
The general working steps of the device are as follows: 1. starting an induced draft fan 8, enabling air to enter the device from an air inlet through an air filter 1, pass through an air heating device 2 and a material receiving device 6 along a pipeline, then reach the induced draft fan 8, and be discharged from an air outlet; 2. the air heating device 2 is started to heat the air entering the device to be warmedThe value of the meter reaches T0The next operation can be performed. The air heating means 2 is preferably a finned steam heater. In order to improve the reliability, the thermometer uses two independent thermometers, the average value is taken as an output value, and meanwhile, when the deviation of the temperature values measured by the two independent thermometers exceeds 1%, the system needs to give an alarm and needs to check or replace the thermometers for use; 3. starting a feeding and air-stopping machine 5, conveying the materials in the feeding device 4 into the device, and adjusting the frequency of the feeding and air-stopping machine 5 to stably convey the materials; 4. the material gets into material collecting device 6, and the material subsides in material collecting device 6 bottoms, and gaseous filter equipment through 6 upper portions of material collecting device gets into draught fan 8 and discharges after filtering. The filtering device at the upper part of the material receiving device 6 is preferably a pulse ash removal type dust removal filter bag, the material of the filter bag is conductive to static electricity, and the heat-resistant temperature is more than 150 ℃ after long-term work; 5. and (3) shutdown sequence after material conveying is finished: the feeding and air-shutting machine 5 is closed, the air heater 2 is closed, and the induced draft fan 8 is closed after the temperature value of the thermometer is lower than 40 ℃; 6. when the material receiving device 6 needs to discharge, the discharging and air-closing machine 7 is started; 7. and closing the discharging air-lock valve 7 after the discharging of the material receiving device 6 is finished.
Examples
In the production of hydroxypropyl methyl cellulose ether (hereinafter referred to as HPMC), the water content of the crushed HPMC product is 3-3.5%, the water content of the HPMC is increased to 6-7% after being conveyed to a mixer, and the water content specified by related standards is lower than 5%.
The specific operation steps are as follows:
1. starting an induced draft fan 8, enabling air to enter the device from an air inlet through an air filter 1, pass through an air heating device 2 and a material receiving device 6 along a pipeline, then reach the induced draft fan 8, and be discharged from an air outlet;
2. the air heating device 2 is started to heat the air entering the device until the value of the thermometer reaches T0The next operation can be performed. The air heating means 2 is preferably a finned steam heater. T is0The temperature was set to 70 ℃. In order to improve the reliability, the thermometer uses two independent thermometers, the average value is taken as an output value, and meanwhile, when the deviation of the temperature values measured by the two independent thermometers exceeds 1 percentWhen the thermometer is used, the system needs to give an alarm and needs to check or replace the thermometer. When the system is in stable operation, the temperature of the system, namely the measured value of the thermometer is controlled at 68-72 ℃;
3. starting a feeding and air-shutting machine 5, conveying the HPMC product in the feeding device 4 into the device, and adjusting the frequency of the air-shutting machine 5 to stably convey the material, wherein the frequency of the air-shutting machine is preferably 10 HZ;
4. the material gets into material collecting device 6 and is the air current blendor, and the material subsides in air current blendor bottom, and gaseous pulse deashing formula dust bag through upper portion filters the back and gets into draught fan 8 and discharge. The material of the pulse ash removal type dust removal filter bag is conductive to static electricity, and the heat-resistant temperature is more than 150 ℃ after long-term work;
5. and (3) shutdown sequence after material conveying is finished: and (3) closing the feeding and air-closing fan 5, closing the air heating device 2, and closing the induced draft fan 8 after the temperature value of the thermometer is less than 40 ℃.
6. The material receiving device 6, namely the air flow mixer, is used for starting the discharging air-lock valve 7 when discharging;
7. and after the discharging is finished, the discharging air-lock valve 7 is closed.
Adopt the utility model discloses carry the back, HPMC product water content keeps at 2.9% -3.7%, and the water content accords with relevant standard specified value.
Claims (10)
1. Moisture absorption device is prevented to cellulose ether transportation process includes and material collecting device (6) through the pipeline intercommunication between air intake (11), its characterized in that: the device comprises a feeding device (4), a pipeline between a material receiving device (6) and an air inlet (11) is communicated with a discharge hole of the feeding device (4), and an air heating device (2) is arranged on the pipeline at the air inlet (11).
2. The cellulose ether transfer process moisture absorption preventing device as set forth in claim 1, wherein: the temperature detection device comprises a temperature detection device (3), one end of the temperature detection device (3) is connected with an air heating device (2), and the other end of the temperature detection device is connected with an air outlet of the air heating device (2).
3. The cellulose ether transfer process moisture absorption preventing device as set forth in claim 2, wherein: the temperature detection device (3) is a thermometer.
4. A cellulose ether transfer process moisture absorption preventing device as set forth in claim 1, 2 or 3, characterized in that: an air filter (1) is arranged between the air inlet (11) and the air heating device (2).
5. The cellulose ether transfer process moisture absorption preventing device as set forth in claim 4, wherein: the air filter (1) is a primary air filter of porous filter material.
6. A cellulose ether transfer process moisture absorption preventing device as set forth in claim 1, 2 or 3, characterized in that: and a feeding air shutter (5) is arranged at the discharge port of the feeding device (4).
7. A cellulose ether transfer process moisture absorption preventing device as set forth in claim 1, 2 or 3, characterized in that: and a discharging air shutter (7) is arranged at the discharging opening of the material receiving device (6).
8. A cellulose ether transfer process moisture absorption preventing device as set forth in claim 1, 2 or 3, characterized in that: the device comprises an induced draft fan (8), wherein the induced draft fan (8) is communicated with a material receiving device (6).
9. A cellulose ether transfer process moisture absorption preventing device as set forth in claim 1, 2 or 3, characterized in that: the air heating device (2) is a finned steam heater or an electric heater.
10. A cellulose ether transfer process moisture absorption preventing device as set forth in claim 1, 2 or 3, characterized in that: the feeding device (4) is a crusher or a sieving machine.
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| CN202022766781.9U CN213631193U (en) | 2020-11-25 | 2020-11-25 | Moisture absorption device is prevented to cellulose ether transportation process |
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| CN202022766781.9U CN213631193U (en) | 2020-11-25 | 2020-11-25 | Moisture absorption device is prevented to cellulose ether transportation process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113908965A (en) * | 2021-11-16 | 2022-01-11 | 泸州北方纤维素有限公司 | Ethyl cellulose crushing and drying method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113908965A (en) * | 2021-11-16 | 2022-01-11 | 泸州北方纤维素有限公司 | Ethyl cellulose crushing and drying method and system |
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