CN113776318A - Green energy-saving gas direct-fired drying system - Google Patents
Green energy-saving gas direct-fired drying system Download PDFInfo
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- CN113776318A CN113776318A CN202111078365.2A CN202111078365A CN113776318A CN 113776318 A CN113776318 A CN 113776318A CN 202111078365 A CN202111078365 A CN 202111078365A CN 113776318 A CN113776318 A CN 113776318A
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- drying device
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- direct
- fired
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- 238000001035 drying Methods 0.000 title claims abstract description 98
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000006200 vaporizer Substances 0.000 claims abstract description 24
- 238000002485 combustion reaction Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000007789 gas Substances 0.000 claims description 38
- 239000000428 dust Substances 0.000 claims description 24
- 239000003949 liquefied natural gas Substances 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000741 silica gel Substances 0.000 abstract description 3
- 229910002027 silica gel Inorganic materials 0.000 abstract description 3
- 230000008016 vaporization Effects 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000002309 gasification Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B20/00—Combinations of machines or apparatus covered by two or more of groups F26B9/00 - F26B19/00
-
- 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
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/02—Heating arrangements using combustion heating
-
- 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
- F26B25/005—Treatment of dryer exhaust gases
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to the field of silica gel drying, in particular to a green energy-saving gas direct-fired drying system which comprises a primary drying device and a secondary drying device, wherein the primary drying device is provided with a material inlet, the secondary drying device is provided with a material outlet, and materials are continuously transferred to the secondary drying device from the primary drying device; the direct combustion equipment is communicated with the secondary drying device, hot air generated by the direct combustion equipment sequentially passes through the secondary drying device and the primary drying device, then passes through the primary drying device in an indirect contact mode after passing through the hot and humid air circulating device as hot and humid air, and then is communicated with the hot and humid air heat exchange device for heating fresh air, and the fresh air is communicated with the direct combustion equipment. The invention adopts the mode of combining two or more drying devices to sequentially dry the materials, thereby improving the heat utilization rate and the drying efficiency; by modifying the air-temperature vaporizer and adding the water bath circulating vaporizer, cold air and cold water generated in the LNG vaporizing process are utilized to replace an air conditioner and a refrigerator.
Description
Technical Field
The invention relates to the field of silica gel drying, in particular to a green energy-saving gas direct-fired drying system.
Background
At present, basically all users adopt single drying modes, the whole drying process from high-moisture-content materials to low-moisture-content finished products is carried out in a drying device, each material has a unique drying curve, and the single drying mode inevitably causes the problems of low heat utilization rate, long drying time, incapability of meeting the requirements on material quality and the like. A large amount of waste gas, waste heat and dust generated in the material drying process are directly discharged into the atmosphere, so that the atmospheric environment is polluted, and the energy waste is also caused; meanwhile, the existing liquefied natural gas is gasified by adopting an air-temperature gasifier, the gasification function is realized by relying on self sensible heat and absorbing the heat of the external atmospheric environment, and the cold energy is completely wasted.
Disclosure of Invention
The invention aims to solve the problems and provides a green energy-saving gas direct-fired drying system which adopts the following technical scheme:
a green energy-saving gas direct-fired drying system comprises a primary drying device and a secondary drying device, wherein the primary drying device is provided with a material inlet, the secondary drying device is provided with a material outlet, and materials are continuously transferred to the secondary drying device from the primary drying device; the direct combustion equipment is communicated with the secondary drying device, hot air generated by the direct combustion equipment sequentially passes through the secondary drying device and the primary drying device, then passes through the primary drying device in an indirect contact mode after passing through the hot and humid air circulating device as hot and humid air, and then is communicated with the hot and humid air heat exchange device for heating fresh air, and the fresh air is communicated with the direct combustion equipment.
On the basis of the scheme, the hot and wet gas heat exchange device comprises a heat exchanger and a spray tower, wherein hot and wet gas penetrates through the heat exchanger and the spray tower in sequence, fresh air is heated by the heat exchanger and then is branched into two paths, one path of fresh air is input into direct combustion equipment, the other path of fresh air is input into a secondary drying device after passing through a material outlet, and condensed water generated by the hot and wet gas through the heat exchanger is converged into process water; and the external water supply exchanges heat with the hot and humid air through the spray tower to form process water, and the hot and humid air is discharged as non-condensable air after exchanging heat.
On the basis of the scheme, hot moisture passing through the primary drying device passes through the gas-liquid separator and then is introduced into the hot moisture heat exchange device, and condensed water generated by the hot moisture at the gas-liquid separator is gathered into process water.
Preferably, the direct combustion equipment is connected with a cold energy utilization device at the upstream, the cold energy utilization device comprises a fan and an air temperature vaporizer, Liquefied Natural Gas (LNG) is communicated with the air temperature vaporizer, and normal temperature air is cooled through the air temperature vaporizer under the action of the fan.
On the basis of the scheme, the direct-fired equipment further comprises a water bath vaporizer, and the water bath vaporizer is arranged between the air temperature vaporizer and the direct-fired equipment.
Preferably, the hot humid air circulation device comprises a dust removing device and a compressing device which are arranged in sequence.
On the basis of the scheme, the dust removal device comprises a plurality of dust removers for removing dust with different particle sizes.
Preferably, the compression device comprises a plurality of compressors for regulating different temperatures.
Preferably, the primary drying device and/or the secondary drying device are a plurality of dryers connected in sequence.
Preferably, the direct-fired device uses centralized heating or distributed heating.
The invention has the beneficial effects that:
1. the material is dried in sequence by adopting a mode of combining two or more drying devices, the flow direction and the circulation path of hot air are adjusted according to different drying environments, the heat utilization rate and the drying efficiency are improved, and the cost is reduced;
2. the hot moisture generated in the drying process is recycled for secondary drying, dust in the hot moisture is recycled in the recycling process and used as a product with a high added value, heat contained in the hot moisture after secondary drying is used for exchanging heat with fresh air, and moisture in the hot moisture is converted into process water for recycling, so that the production cost is reduced, and the environment is protected;
3. by modifying the air-temperature vaporizer and adding the water bath circulating vaporizer, cold air and cold water generated in the LNG gasification process are utilized to replace an air conditioner and a refrigerator, the power consumption of refrigeration equipment is reduced, and the production cost is reduced; meanwhile, the LNG gasification efficiency and speed are enhanced, the stability of gas supply of gas using equipment is ensured, the gas supply temperature is increased, and the combustion efficiency is improved.
Drawings
FIG. 1: the invention is a work flow chart.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1, a green energy-conserving gas direct combustion drying system, including one-level drying device and second grade drying device, one-level drying device sets up the material import, second grade drying device sets up the material export, the material is dried by one-level drying device after transmitting to second grade drying device continuously and is continued to be dried, one-level drying device compares with second grade drying device, the lower while humidity of stoving ambient temperature is higher, thereby can use for the steam of drying to input and carry out the stoving back from second grade drying device, still can satisfy one-level drying device's drying condition, further transmit to one-level drying device and dry. Through above-mentioned structure can accomplish the secondary stoving of material, improve oven-dry mass and stoving speed, improve hot-blast utilization ratio, reduce energy consumption simultaneously. Preferably, the primary drying device and/or the secondary drying device are a plurality of dryers connected in sequence, so that the materials are dried for a plurality of times by the plurality of dryers in sequence, and the number of the dryers can be adjusted according to the drying processing requirements. The direct combustion equipment and the material outlet are communicated with the drier connected with the tail end. Such dryers include, but are not limited to, box dryers, vertical dryers, tunnel dryers, paddle dryers, mesh belt dryers, ebullating beds, double cone rotary vacuum dryers, conduction dryers, rake dryers, tray dryers, drum dryers, pneumatic dryers, flash dryers, spray dryers, vibratory fluidized beds, microwave dryers, infrared dryers, and the like.
The direct-fired equipment is communicated with the secondary drying device, and the direct-fired equipment adopts centralized heat supply or distributed heat supply. The hot-blast back that produces of direct combustion equipment becomes hot moisture through secondary drying device, primary drying device in proper order, discharges into hot moisture circulating device, and hot moisture circulating device is including the dust collector and the compression device that set gradually, and dust collector is arranged in retrieving hot moisture's dust, on the one hand with dust recycle, on the other hand prevents that the dust from causing the damage to the compressor. The dust removing device includes a plurality of dust collectors for removing dust of different particle sizes, including but not limited to the following kinds: the cyclone dust collector, the filter cartridge dust collector, the bag-type dust collector, the electrostatic dust collector and the water film dust collector are selected according to the actual processing requirements. The above-mentioned compression apparatus is used for heating hot humid gas, and the compression apparatus includes a plurality of compressors for adjusting different temperatures, and the compressors include but are not limited to the following kinds: screw compressor, roots compressor, centrifugal compressor, scroll compressor, piston compressor. The compressors can be connected in series in one stage or multiple stages in parallel, the adjustable temperature section comprises the temperature below 80 ℃, 80-100 ℃, 100 ℃ and 120 ℃, 120 ℃ and 140 ℃ and above, and the type and the number of the compressors are selected according to the heating requirement.
After passing through the hot and humid air circulating device, the hot and humid air passes through the primary drying device in an indirect contact mode, on one hand, heat exchange is carried out between the heat of the hot and humid air and materials in the primary drying device, secondary utilization is carried out on the heat, and on the other hand, moisture in the hot and humid air is prevented from entering the materials. Specifically, the heat exchange tube and other structures can be adopted to enable hot and humid air to pass through the material for heat exchange, and the direct contact between the hot and humid air and the material is avoided.
The hot wet gas passes through the primary drying device and then is communicated with a hot wet gas heat exchange device for heating fresh air, and the fresh air is communicated with the direct-fired equipment. The hot and wet gas heat exchange device comprises a heat exchanger and a spray tower, wherein hot and wet gas penetrates through the heat exchanger and the spray tower in sequence, fresh air is heated by heat of the hot and wet gas through the heat exchanger, then the fresh air is branched into two paths, one path of the fresh air is input into direct combustion equipment to be combusted, the other path of the fresh air is input into a secondary drying device to be used as supplementary fresh air after passing through a material outlet and exchanging heat with a material to be heated and dried, and condensed water generated by the hot and wet gas through the heat exchanger is converged into process water; external water supply is subjected to heat exchange with hot and humid air through the spray tower to form process water, residual heat in the hot and humid air is reused, and gas after heat exchange of the hot and humid air is discharged as clean and normal-temperature noncondensable gas, so that dust pollution and thermal pollution to the atmosphere are avoided. Meanwhile, hot wet gas passing through the primary drying device passes through the gas-liquid separator and then is introduced into the hot wet gas heat exchange device, and condensed water generated by the hot wet gas at the gas-liquid separator is converged into process water, so that the full recycling of the moisture in the hot wet gas is completed.
The cold energy utilization device is connected to direct combustion equipment upper reaches, and it includes fan and air temperature vaporizer, and Liquefied Natural Gas (LNG) and air temperature vaporizer intercommunication, normal atmospheric temperature air generate cold air through the air temperature vaporizer cooling down under the fan effect, input workshop and be used for the workshop cooling, utilize the cold energy of LNG and replace the air conditioner, save the cost. Further, the direct combustion equipment also comprises a water bath vaporizer, the water bath vaporizer is arranged between the air temperature vaporizer and the direct combustion equipment, normal temperature water is conveyed into the water bath vaporizer through a water pump and is subjected to further heat exchange with LNG output by the air temperature vaporizer, cold energy released in the LNG gasification process is further utilized to cool the normal temperature water, and the normal temperature water is used as cooling water for a workshop, so that the structure and energy cost for additionally processing the cooling water is saved. The liquefied natural gas can be replaced by combustible substances such as liquefied petroleum gas, pipeline natural gas and the like.
The direct-fired drying system can be also suitable for drying other materials outside the field of silica gel production, and also shall be covered by the protection scope of the invention.
The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.
Claims (10)
1. A green energy-saving gas direct-fired drying system is characterized by comprising a primary drying device and a secondary drying device, wherein the primary drying device is provided with a material inlet, the secondary drying device is provided with a material outlet, and materials are continuously transferred to the secondary drying device from the primary drying device; the direct combustion equipment is communicated with the secondary drying device, hot air generated by the direct combustion equipment sequentially passes through the secondary drying device and the primary drying device, then passes through the primary drying device in an indirect contact mode after passing through the hot and humid air circulating device as hot and humid air, and then is communicated with the hot and humid air heat exchange device for heating fresh air, and the fresh air is communicated with the direct combustion equipment.
2. The green energy-saving gas direct-fired drying system of claim 1, wherein the hot and humid gas heat exchange device comprises a heat exchanger and a spray tower through which hot and humid gas sequentially passes, fresh air is heated by the heat exchanger and then branched into two paths, one path is input into the direct-fired equipment, the other path is input into the secondary drying device after passing through a material outlet, and condensed water generated by the hot and humid gas passing through the heat exchanger is converged into process water; and the external water supply exchanges heat with the hot and humid air through the spray tower to form process water, and the hot and humid air is discharged as non-condensable air after exchanging heat.
3. The green energy-saving gas direct-fired drying system of claim 2, wherein the hot moisture passing through the primary drying device passes through a gas-liquid separator and then is introduced into a hot moisture heat exchange device, and condensed water generated by the hot moisture at the gas-liquid separator is gathered into process water.
4. The green energy-saving gas direct-fired drying system as claimed in claim 1, wherein a cold energy utilization device is connected to the upstream of the direct-fired equipment, the cold energy utilization device comprises a fan and an air-temperature vaporizer, Liquefied Natural Gas (LNG) is communicated with the air-temperature vaporizer, and normal temperature air is cooled by the fan through the air-temperature vaporizer.
5. The green energy-saving gas direct-fired drying system according to claim 4, wherein the direct-fired device further comprises a water bath vaporizer, and the water bath vaporizer is arranged between the air temperature vaporizer and the direct-fired device.
6. The green energy-saving gas direct-fired drying system according to claim 1, wherein the hot wet gas circulating device comprises a dust removing device and a compressing device which are arranged in sequence.
7. The green energy-saving gas direct-fired drying system according to claim 6, wherein the dust removing device comprises a plurality of dust collectors for removing dust with different particle sizes.
8. The green energy-saving gas direct-fired drying system according to claim 6, wherein the compressing device comprises a plurality of compressors for adjusting different temperatures.
9. The green energy-saving gas direct-fired drying system of claim 1, wherein the primary drying device and/or the secondary drying device are a plurality of dryers connected in sequence.
10. The green energy-saving gas direct-fired drying system according to claim 1, wherein the direct-fired equipment adopts centralized heating or distributed heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111078365.2A CN113776318A (en) | 2021-09-15 | 2021-09-15 | Green energy-saving gas direct-fired drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111078365.2A CN113776318A (en) | 2021-09-15 | 2021-09-15 | Green energy-saving gas direct-fired drying system |
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| Publication Number | Publication Date |
|---|---|
| CN113776318A true CN113776318A (en) | 2021-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111078365.2A Pending CN113776318A (en) | 2021-09-15 | 2021-09-15 | Green energy-saving gas direct-fired drying system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114906621A (en) * | 2022-06-30 | 2022-08-16 | 苏州娄城新材料科技有限公司 | Modified fly ash pressure conveying and mixing system and process |
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| CN103991890A (en) * | 2014-05-30 | 2014-08-20 | 泰州市三联助剂有限公司 | Heating device for aluminum hydroxide |
| CN104033726A (en) * | 2014-07-03 | 2014-09-10 | 深圳城市节能环保科技有限公司 | Self-pressurization automatic control LNG skid-mounted station |
| CN207471960U (en) * | 2017-05-15 | 2018-06-08 | 成都赋阳技术开发有限公司 | A kind of environment-friendly and energy-efficient drying machine |
| EP3351385A1 (en) * | 2017-01-19 | 2018-07-25 | Nanjing Suote Packaging Products Co., Ltd. | Hot air circulating system for printing press |
| CN111023791A (en) * | 2019-12-23 | 2020-04-17 | 青岛创客智造机械设备有限公司 | Drying waste heat recycling integrated device |
| US20200173096A1 (en) * | 2018-11-29 | 2020-06-04 | Williams Boot & Glove Dryers Inc. | Forced air drying locker |
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2021
- 2021-09-15 CN CN202111078365.2A patent/CN113776318A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103991890A (en) * | 2014-05-30 | 2014-08-20 | 泰州市三联助剂有限公司 | Heating device for aluminum hydroxide |
| CN104033726A (en) * | 2014-07-03 | 2014-09-10 | 深圳城市节能环保科技有限公司 | Self-pressurization automatic control LNG skid-mounted station |
| EP3351385A1 (en) * | 2017-01-19 | 2018-07-25 | Nanjing Suote Packaging Products Co., Ltd. | Hot air circulating system for printing press |
| CN207471960U (en) * | 2017-05-15 | 2018-06-08 | 成都赋阳技术开发有限公司 | A kind of environment-friendly and energy-efficient drying machine |
| US20200173096A1 (en) * | 2018-11-29 | 2020-06-04 | Williams Boot & Glove Dryers Inc. | Forced air drying locker |
| CN111023791A (en) * | 2019-12-23 | 2020-04-17 | 青岛创客智造机械设备有限公司 | Drying waste heat recycling integrated device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114906621A (en) * | 2022-06-30 | 2022-08-16 | 苏州娄城新材料科技有限公司 | Modified fly ash pressure conveying and mixing system and process |
| CN114906621B (en) * | 2022-06-30 | 2023-12-19 | 苏州娄城新材料科技有限公司 | Modified fly ash pressure conveying mixing system and process |
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Application publication date: 20211210 |