CN109734278A - A kind of sludge at low temperature drying process and sludge at low temperature drying machine - Google Patents
A kind of sludge at low temperature drying process and sludge at low temperature drying machine Download PDFInfo
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- CN109734278A CN109734278A CN201811210036.7A CN201811210036A CN109734278A CN 109734278 A CN109734278 A CN 109734278A CN 201811210036 A CN201811210036 A CN 201811210036A CN 109734278 A CN109734278 A CN 109734278A
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- 239000010802 sludge Substances 0.000 title claims abstract description 91
- 238000001035 drying Methods 0.000 title claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 63
- 238000009423 ventilation Methods 0.000 claims description 12
- 230000003993 interaction Effects 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 230000003447 ipsilateral effect Effects 0.000 claims description 3
- 239000005439 thermosphere Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 19
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002361 compost Substances 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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- Drying Of Solid Materials (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention belongs to environmental technology fields, more particularly to a kind of sludge at low temperature drying process and sludge at low temperature drying machine, technique includes: that at least one section is arranged, and is provided with heating device and wind circulator in section, is provided with critical-temperature and maximum heating temperature in heating device；Sludge is placed in section, heating device and wind circulator are started, the sludge in section is heated；When the temperature in section reaches critical-temperature, the temperature of heating devices heat gradually goes up within a certain period of time, until the heating temperature of heating device reaches maximum heating temperature；When the temperature in section reaches maximum heating temperature, heater stop drives hot-air to be further dried until the temperature in section reaches room temperature by wind circulator.Technique of the present invention highly effective drying sludge, set drying machine can be equipped with multiple sections while saving the energy, can dry multiclass sludge simultaneously, drying efficiency is high, applied widely.
Description
Technical field
The invention belongs to environmental technology fields, and in particular to a kind of sludge at low temperature drying process and sludge at low temperature drying machine.
Background technique
There are many disposal options of waste material, and main mode has burning and compost, but whether burning or compost are all
The lower waste material of water content is needed, therefore needs to handle waste material before use.The dry major way of waste material is at present
It is heating and drying, i.e., waste material is placed in a space and is heated, then taken out.The type of waste material has very much, wherein living
The dry of sludge needs to carry out under low-temperature heat.Existing low temperature drying mode is mostly that sludge is placed at one, setting
The temperature of setting is heated rapidly to after temperature, to realize the low temperature drying of sludge.But such method has many drawbacks, first is that
For the temperature of low-temperature heat, there are certain section (common temperature are substantially between 52 DEG C -62 DEG C), if temperature is set
It sets at 52 DEG C, having partial moisture and being attached to Sludge Surface in the drying process can not be removed, so as to cause the dirt after drying
Mud water content is unable to reach index；If another is by temperature setting at 62 DEG C, sludge heating drying quickly can be removed into water
Point, but the toxic chemical substance contained in sludge is easy to cause to be inconjunction with moisture evaporation in this process, handle such chemistry
Substance can improve the process costs of the process.
In addition, the chemical raw material contained by different types of sludge is different, the sludge of heterogeneity will lead to the sludge and need
Otherwise with temperature and different time heated and air-dried.Being currently used for the dry equipment of sludge at low temperature can only be to one
Kind waste material is dried, if the waste material that processing is different, that is, need to carry out multiple drying process, it is also necessary to repeatedly setting, it is time-consuming
Arduously, low efficiency.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, so that it is dry to provide a kind of sludge at low temperature
Technique and sludge at low temperature drying machine.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of sludge at low temperature drying process, which is characterized in that steps are as follows:
1) at least one is set for placing the section of sludge, temperature sensor, heating device and wind circulation are provided in section
Device is provided with critical-temperature and maximum heating temperature in heating device；
2) dry sludge will be needed to be placed in section, starts heating device and wind circulator, the sludge in section is added
Heat, the temperature setting of heating device is in critical-temperature at this time；
3) when temperature sensor, which monitors the temperature in section, reaches critical-temperature, the temperature of heating devices heat is in a timing
It is interior gradually to go up, until the heating temperature of heating device reaches maximum heating temperature；
4) when temperature sensor, which monitors the temperature in section, reaches maximum heating temperature, heater stop is followed by wind
Loop device drives hot-air to be further dried；
5) it after temperature sensor, which monitors the temperature in section, is reduced to room temperature, takes out and completes dry sludge.
In the above method, the range of critical-temperature described in step 1 is 52 DEG C -60 DEG C, and maximum heating temperature is 62 DEG C.
In the above method, certain time described in step 3 preset according to sludge.
Further, condensing unit is provided in wind circulator, condensing unit can will pass through the moisture in hot-air
Condensation discharge.
A kind of sludge at low temperature drying process, including fuselage, fuselage is interior to be equipped with hothouse, and fuselage side is equipped with entrance,
It is characterized in that: being equipped with the connecting plate being located among hothouse in hothouse, ventilation shaft is provided in connecting plate, and connecting plate two sides are solid
Surely there are wind circulator and several demarcation plates being placed equidistant with, the demarcation plate other end is fixed with inboard, is provided on demarcation plate
Automatic venthole；Demarcation plate separates hothouse, forms section between ipsilateral and adjacent demarcation plate, is provided in section
Temperature sensor.
Further, the air-supply fixed with fuselage and be located at the same end with connecting plate and fuselage bearing is provided on fuselage
Case is provided with air outlet on wind pushing box, and air outlet is connect with ventilation shaft；Integrally formed air duct, each section are equipped in fuselage
Position corresponding with connecting plate is equipped with air inlet, having heaters is arranged on the inside of air inlet, air inlet is connect with ventilation shaft；Often
One section position corresponding with fuselage is equipped with air outlet, and air outlet is connect with air duct；Be provided with exhaust outlet on fuselage, exhaust outlet with
Air duct connects, and is provided with filter device in exhaust outlet.
Further, fuselage outer side be equipped with temperature sensor, wind pushing box, air inlet and outlet, automatic venthole and
The human-computer interaction interface of heater connection.It can be realized the control to wind pushing box air output, to heating by human-computer interaction interface
Critical-temperature, maximum heating temperature and the heating time of device be configured, heater is controlled according to the signal of temperature sensor,
The open and close of heater, the open and close of air inlet and air outlet, automatic venthole it is on and off.
Further, the demarcation plate is equipped with the unilateral gate hinged with demarcation plate.It can be realized by unilateral gate to area
Between sealing, reduce adjacent interval between temperature interference, also facilitate the disengaging of operator.
Further, the demarcation plate two sides are provided with thermal insulation layer.Set thermal insulation layer can prevent between adjacent interval
Temperature interference is generated, the work accuracy of the drying machine is improved.
Further, the hermatic door hinged with fuselage is provided on the entrance.
Further, condenser is equipped in air duct, the condenser is located at filter device side.Set condenser can
The condensate moisture discharge in the hot-air of condenser will be passed through.
Compared to the prior art the present invention, has the following advantages that and effect: by the way that sludge is heated to critical-temperature, then will
Temperature is slowly increased to highest, can dry sludge and be attached to the moisture of Sludge Surface, can prevent from leading because being rapidly heated
It causes the harmful components in sludge largely to volatilize, can also prevent because moisture drying caused by drying temperature is too low is incomplete；In addition,
After heating temperature reaches highest, heating device is closed, by the dry sludge of hot air circulation until heat is lost completely, further
It is used for drying sludge using the energy, sludge is air-dried by hot wind, guarantees that the water content of sludge reaches qualified while saving the energy
Index；The sludge at low temperature drying machine is equipped with multiple sections for drying, can carry out simultaneously to the sludge of multiple and different types
It dries, dries the high-efficient of sludge, applicable range is wide.
Detailed description of the invention
Fig. 1 is the flow diagram of sludge at low temperature drying process of the present invention.
Fig. 2 is the structural schematic diagram of the embodiment of the present invention.
Fig. 3 is the front view of the embodiment of the present invention.
Fig. 4 is the cross-sectional view of the embodiment of the present invention.
Fig. 5 is the schematic diagram of wind circulator.
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.
Specific embodiment
It is understandable in order to enable the above objects, features and advantages of the present invention to become apparent, with reference to the accompanying drawing to this hair
Bright specific embodiment is described in detail.
A kind of sludge at low temperature drying process, which is characterized in that steps are as follows:
1) at least one is set for placing the section 31 of sludge, is provided with temperature sensor, heating device and wind in section 31
Circulator 5 is provided with critical-temperature and maximum heating temperature in heating device.
2) dry sludge will be needed to be placed in section 31, starts heating device and wind circulator 5, in section 31
Sludge heating, the temperature setting of heating device is in critical-temperature at this time.
3) when temperature sensor, which monitors the temperature in section 31, reaches critical-temperature, the temperature of heating devices heat exists
Gradually go up in certain time, until the heating temperature of heating device reaches maximum heating temperature.
4) when temperature sensor, which monitors the temperature in section 31, reaches maximum heating temperature, heater stop is led to
Crossing wind circulator 5 drives hot-air to be further dried.
5) it after temperature sensor, which monitors the temperature in section 31, is reduced to room temperature, takes out and completes dry sludge.
In the above method, the range of critical-temperature described in step 1 is 52 DEG C -60 DEG C, and maximum heating temperature is 62 DEG C,
The sludge that specific critical-temperature can dry as needed is configured, for example, critical-temperature for 54 DEG C sludge can directly by
Critical-temperature is arranged at 54 DEG C, and the critical-temperature that sludge is arranged in heating temperature directly can be made sludge fast vaporizing moisture,
The quick volatilization of unclean ingredient in sludge is avoided while saving the energy.When sludge reaches critical-temperature rear portion moisture vapour
Change, another part moisture can be attached on sludge, hereafter slowly improve the temperature of heating, can make the moisture adhered on sludge by
Step vaporization, while not interfering with sludge itself.After the temperature of sludge reaches 62 DEG C, the moisture of attachment vaporizes substantially, stops at this time
It only heats, drives the hot-air in section 31 to flow by wind circulator 5, to carry out using heat remaining in section 31
Hot air drying.After the temperature in section is reduced to room temperature (heat has been lost), the dry of sludge is completed.
In the above method, certain time described in step 3 is arranged accordingly according to the type and cost of sludge, no
Easy drying or the higher sludge of moisture content can realize drying by the way that longer heating time is arranged.
In this method, condensing unit is provided in wind circulator 5, condensing unit can will pass through the moisture in hot-air
Condensation discharge, further increases the drying effect of hot-air.
The technique is used for low temperature drying sludge, by the way that sludge is heated to critical-temperature, then temperature is slowly increased to most
Height can dry sludge and be attached to the moisture of Sludge Surface.Existing low temperature drying sludge method is compared, this technique can
Prevent from causing the harmful components in sludge largely to be volatilized because being rapidly heated, can also prevent because drying temperature it is too low caused by moisture
It is dry incomplete.After heating temperature reaches highest, heating device is closed, by the dry sludge of hot air circulation until heat is complete
It is lost.The step can further utilize the energy for drying sludge, air-dry sludge by hot wind, guarantee while saving the energy
The water content of sludge reaches qualified index, dries the more efficient of sludge.
Embodiment.
As shown in Figure 2-5, the present embodiment includes fuselage 1, and hothouse 11 is equipped in fuselage 1, and 1 side of fuselage is equipped with entrance
12, entrance 12 is provided with the hermatic door 13 hinged with fuselage 1 outside, can pass in and out hothouse 11 by opening hermatic door 13, together
Sealing of the Shi Shixian to hothouse 11.
Connecting plate 2 is equipped in hothouse 11, connecting plate 2 is located among hothouse 11 and in one end of connecting plate 2 and fuselage 1
Side is fixed.2 two sides of connecting plate are equipped with wind circulator 5 and several perpendicular to connecting plate 2 and the demarcation plate 3 of equidistant arrangement, point
3 one end of partition and connecting plate 2 are fixed, fixed on the inside of the other end and fuselage 1, are provided with automatic venthole 30 on each demarcation plate 3.Position
Section 31 is formed between ipsilateral and adjacent demarcation plate 3, is provided with temperature sensor, set temperature sensor in section 31
For monitoring the temperature in the section 31 in real time.In the present embodiment, 3 quantity of demarcation plate of every side is three, i.e. demarcation plate 3 will be done
Dry room 11 is separated out the section 31 of four same spaces, and each section 31, which can be used for placing, needs dry waste material.Specifically, working as
After automatic through-hole hole 30 is opened, starts wind circulator 5, make the air circulation flow in hothouse 11, sludge can be made into one
The air-dried drying of step.
Wind pushing box 4 is provided on fuselage 1, wind pushing box 4 and fuselage 1 are fixed, the fixation of wind pushing box 4 and connecting plate 2 and fuselage 1
Place is located at the same end.It is provided with air outlet 41 on wind pushing box 4, ventilation shaft 21, air outlet 41 and ventilation shaft are provided in connecting plate 2
The connection of 21 one end, coupling part pass through the bottom of fuselage 1.In addition, being equipped with integrally formed air duct 14, each section in fuselage 1
31 positions corresponding with connecting plate 2 are equipped with air inlet 32, and having heaters 33, air inlet 32 and ventilation are arranged on the inside of air inlet 32
Pipeline 21 connects；Each section 31 position corresponding with fuselage 1 is equipped with air outlet 34, and air outlet 34 is connect with air duct 14.Machine
Exhaust outlet 15 is also provided on body 1, exhaust outlet 15 is located at the other end of opposite wind pushing box 4, and exhaust outlet 15 is connect with air duct 14, air draft
Filter device 42 is additionally provided in mouth 15, set filter device 42 can filter the air being discharged from exhaust outlet 15, remove it
In harmful substance.Specifically, wind pushing box 4 sucks air from outside, then air is discharged into ventilation shaft 21 by air outlet 41
Interior, air is entered in section 31 by air inlet 32, and air can be by heater 33, to keep air fast before entering section 31
Speed is heated to assigned temperature, and the hot-air into section 31 is entered in air duct 14 by air outlet 34 again, finally by 15 row of exhaust outlet
Out.In addition, being additionally provided with condenser 6 in air duct 14, set condenser 6 is located at 42 side of filter device, and condenser 6 can will lead to
The condensate moisture discharge in the hot-air of condenser 6 is crossed, the moisture content reduced in hot-air can be improved dry effect.
On the outside of fuselage 1 be equipped with temperature sensor, wind pushing box 4, air inlet 32, air outlet 34, automatic venthole 30 and
The human-computer interaction interface 7 that heater 33 connects.It can be realized the control to 4 air output of wind pushing box, right by human-computer interaction interface 7
Critical-temperature, maximum heating temperature and the heating time of heater 33 are configured, are controlled according to the signal of temperature sensor
Heater 33, the open and close of heater 33, the open and close of air inlet 32 and air outlet 34, automatic venthole 30 are beaten
Push And Release closes.
In addition, being additionally provided with the unilateral gate 35 hinged with demarcation plate 3 on each demarcation plate 3.It can be realized by unilateral gate 35
Sealing to section 31 reduces the temperature interference between adjacent interval 31, also facilitates the disengaging of operator.3 two sides of demarcation plate are also
It is provided with thermal insulation layer.Set thermal insulation layer can prevent from generating temperature interference between adjacent interval 31, improve the work of the drying machine
Make accuracy.
The workflow of the sludge at low temperature drying process are as follows: dry waste material will be needed to be individually positioned in section 31, led to
Critical-temperature and maximum heating temperature that human-computer interaction interface 7 sets each section 31 are crossed, wind pushing box 4 is started；Wind pushing box 4 from
Outside sucking air, then air is discharged into ventilation shaft 21 by air outlet 41, then air inlet 32 is passed through by ventilation shaft 21
It is sent into each section 31；Air can be by corresponding heater 33, so that air be made quickly to add before entering the section 31
Heat arrives preset critical-temperature, and the hot-air into section 31 is entered in air duct 14 by air outlet 34, finally by exhaust outlet
15 discharges；Hot-air can pass through filter device 42 and condenser 6 in discharge process, and set filter device 42 can the row of filtering out
The waste granules carried secretly in air out, set condenser 6 can condense steam contained in air；When the temperature in a certain section 31
After sensor monitors the section 31 arrival critical-temperature, heater 33 starts to improve temperature until reaching maximum heating temperature
(time needed for the process is preset by human-computer interaction interface 7), the temperature in the section 31 add after reaching maximum heating temperature
Hot device 33 stops；After temperature when each section 31 reaches maximum heating temperature, wind pushing box 4 stops, all 32 Hes of air inlet
Air outlet 34 is closed, and all automatic ventholes 30 are opened, and wind circulator 5 starts, and the air in hothouse 11 is recycled in wind and filled
It sets and is recycled under 5 driving around connecting plate 2, realize that hot air circulation air-dries；At a temperature of temperature sensor monitors hothouse
Human-computer interaction interface 7 issues signal after dropping to room temperature, and drying sludge is completed.
The sludge at low temperature drying process scientific structure passes through set area equipped with multiple sections 31 for drying sludge
Between 31 the sludge of different dry demands (different critical-temperatures and different heating times) can be dried, Mei Gegan
The temperature and time of heating can be separately provided in dry section 31, and comparing existing low-temperature drying equipment, its is more efficient, be applicable in model
It encloses wide.
Above content is only illustrations made for the present invention described in this specification.Technology belonging to the present invention
The technical staff in field can make various modifications or additions to the described embodiments or by a similar method
Substitution, content without departing from description of the invention or beyond the scope defined by this claim should belong to this
The protection scope of invention.
Claims (8)
1. a kind of sludge at low temperature drying process, which is characterized in that steps are as follows:
At least one is set for placing the section of sludge, temperature sensor, heating device and wind circulation dress are provided in section
It sets, critical-temperature and maximum heating temperature is provided in heating device；
Dry sludge will be needed to be placed in section, start heating device and wind circulator, the sludge in section is heated,
The temperature setting of heating device is in critical-temperature at this time；
When temperature sensor, which monitors the temperature in section, reaches critical-temperature, the temperature of heating devices heat is in certain time
Inside gradually go up, until the heating temperature of heating device reaches maximum heating temperature；
When temperature sensor, which monitors the temperature in section, reaches maximum heating temperature, heater stop is recycled by wind
Device drives hot-air to be further dried；
After temperature sensor, which monitors the temperature in section, is reduced to room temperature, takes out and complete dry sludge；
Wherein, the range of critical-temperature described in step 1 is 52 DEG C -60 DEG C, and maximum heating temperature is 62 DEG C.
2. sludge at low temperature drying process according to claim 1, it is characterised in that: certain time root described in step 3
Preset according to sludge.
3. sludge at low temperature drying process according to claim 1, it is characterised in that: be provided with condensation dress in wind circulator
It sets, condensing unit can will be discharged by the condensate moisture in hot-air.
4. a kind of sludge at low temperature drying machine, including fuselage, fuselage is interior to be equipped with hothouse, and fuselage side is equipped with entrance, feature
It is: is equipped with the connecting plate being located among hothouse in hothouse, is provided with ventilation shaft in connecting plate, connecting plate two sides are fixed with
Wind circulator and several demarcation plates being placed equidistant with, the demarcation plate other end are fixed with inboard, are provided on demarcation plate automatic
Venthole；Demarcation plate separates hothouse, forms section between ipsilateral and adjacent demarcation plate, is provided with temperature in section
Sensor；
It is provided with the wind pushing box fixed with fuselage and be located at the same end with connecting plate and fuselage bearing on fuselage, is opened on wind pushing box
There is air outlet, air outlet is connect with ventilation shaft；Integrally formed air duct is equipped in fuselage, each section is corresponding with connecting plate
Position is equipped with air inlet, having heaters is arranged on the inside of air inlet, air inlet is connect with ventilation shaft；Each section and fuselage pair
The position answered is equipped with air outlet, and air outlet is connect with air duct；Exhaust outlet is provided on fuselage, exhaust outlet is connect with air duct, air draft
Filter device is provided in mouthful；
Fuselage outer side is equipped with and connect with temperature sensor, wind pushing box, air inlet and outlet, automatic venthole and heater
Human-computer interaction interface.
5. sludge at low temperature drying machine according to claim 1, it is characterised in that: the demarcation plate is equipped with to be cut with scissors with demarcation plate
The unilateral gate connect.
6. sludge at low temperature drying machine according to claim 1, it is characterised in that: be provided on the entrance and cut with scissors with fuselage
The hermatic door connect.
7. sludge at low temperature drying machine according to claim 1 or 2, it is characterised in that: the demarcation plate two sides be provided with every
Thermosphere.
8. sludge at low temperature drying machine according to claim 1, it is characterised in that: be equipped with condenser, the condensation in air duct
Device is located at filter device side.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811210036.7A CN109734278B (en) | 2018-10-17 | 2018-10-17 | Sludge low-temperature drying process and sludge low-temperature dryer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811210036.7A CN109734278B (en) | 2018-10-17 | 2018-10-17 | Sludge low-temperature drying process and sludge low-temperature dryer |
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| CN109734278A true CN109734278A (en) | 2019-05-10 |
| CN109734278B CN109734278B (en) | 2022-03-11 |
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Cited By (3)
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| CN110732149A (en) * | 2019-11-18 | 2020-01-31 | 好空气科技发展有限公司 | liquid phase separation purification device |
| CN111218413A (en) * | 2019-10-12 | 2020-06-02 | 陕西恒田生物农业有限公司 | Preparation and application of bacillus methylotrophicus LW-6 microbial inoculum for biological control of root-knot nematodes |
| CN112429933A (en) * | 2020-11-02 | 2021-03-02 | 江苏苏讯新材料科技有限公司 | Low-temperature sludge drying treatment process |
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| Publication number | Publication date |
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| CN109734278B (en) | 2022-03-11 |
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Denomination of invention: Sludge low-temperature drying process and sludge low-temperature dryer Effective date of registration: 20220415 Granted publication date: 20220311 Pledgee: Zhejiang Tonglu Hengfeng village bank Limited by Share Ltd. Pledgor: HANGZHOU CHUAN EN ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2022330000530 |
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Date of cancellation: 20230517 Granted publication date: 20220311 Pledgee: Zhejiang Tonglu Hengfeng village bank Limited by Share Ltd. Pledgor: HANGZHOU CHUAN EN ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2022330000530 |
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Denomination of invention: A Low Temperature Drying Process for Sludge and a Low Temperature Drying Machine for Sludge Effective date of registration: 20230531 Granted publication date: 20220311 Pledgee: Zhejiang Tonglu Hengfeng village bank Limited by Share Ltd. Pledgor: HANGZHOU CHUAN EN ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Registration number: Y2023330001024 |