CN202543016U - Quick heat drying treatment device for sludge - Google Patents
Quick heat drying treatment device for sludge Download PDFInfo
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- CN202543016U CN202543016U CN2011205625082U CN201120562508U CN202543016U CN 202543016 U CN202543016 U CN 202543016U CN 2011205625082 U CN2011205625082 U CN 2011205625082U CN 201120562508 U CN201120562508 U CN 201120562508U CN 202543016 U CN202543016 U CN 202543016U
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Abstract
The utility model relates to a quick heat drying treatment device for sludge. The quick heat drying treatment device consists of a controllable explosion burner, a sludge conveying mechanism and a post-dryer, wherein the controllable explosion burner consists of a burning chamber, an igniter, an air inlet pipeline, a fuel inlet pipeline, a tail pipe and a jacket, wherein the burning chamber is fixed in the jacket; the air inlet pipeline, the fuel inlet pipeline and the igniter are fixed on the burning chamber; the tail pipe is fixed in the jacket; one end of the tail pipe is communicated with the burning chamber; the other end of the tail pipe extends out of the jacket and is communicated with the post-dryer; the sludge conveying mechanism is fixed above the outer side of the jacket; and the tail end of the sludge conveying mechanism extends into the jacket and is communicated with the tail pipe. The quick heat drying treatment device for sludge has the advantages of simple structure, quick drying, low drying energy consumption, uniform sizes of sludge particles, difficulty in wall sticking of particles and the like; and a heat drying treatment method has the advantages of simple process, easiness for realization and good effect; and therefore, the quick heat drying treatment device is high in innovativeness.
Description
Technical field
The utility model belongs to sludge treatment and recycling apparatus field, particularly a kind of mud Rapid Thermal drying and other treatment device.
Background technology
Mud is the solid waste that municipal wastewater handle to produce, and contains a large amount of organism and malignant bacteria crowd, as deals with improperly and easy urban environment and residents ' health are had a negative impact.By the end of the year 2009,3134 of the total urban wastewater treatment firms in the whole nation, throughput 11160 cubic meters per day are when 2,124 ten thousand tons/year in the mud of contracts water ratio 80%.China's city sludge amount in 2015 is estimated to reach 3,143 ten thousand tons/year.Therefore, municipal sludge is carried out safety, standardization processing disposes, realize sludge reduction, innoxious and resource utilization, be the significant challenge that faces of China's urban development it
It is agricultural that the present both at home and abroad mode of handling mud mainly contains landfill, heat drying, burning, row sea and compost; But in developed country and area; The mud heat drying can realize sludge reduction, innoxious on a large scale; Have simultaneously that floor space is little, centralized equipment, computer-aided traffic control degree are higher, to advantages such as environmental influence are little, just obtaining increasing practical application.But the mud landfill after the mummification, make agricultural fertilizer, gardens and building materials utilization or directly burn.At present, commercial applications mud heat drying mode can reduce drying processes such as belt, rotating disc type, oar blade type, drum-type, fluidized-bed, spraying both at home and abroad, and different heat drying technologies respectively have relative merits.
Spraying drying is through mechanical effect; To need the exsiccant material, and be dispersed into very thin particulate (increase the moisture evaporation area, quicken drying process) and contact with warm air as mist; In moment most of moisture is removed, make the solid matter in the material be dried to powder.At present, using the spraying drying mode, to handle mud technology actually rare.Chinese patent document CN2871525Y describes a kind of mud slurry spray drying treatment technology.Build a spraying drying tube by laying bricks or stones at incinerator flue rear, mud is starched by pump delivery, in nozzle sprays into the spraying drying tube, contacts and drying with hot flue gases.The heat energy sludge-drying that this method mainly utilizes waste incineration to produce.Chinese patent document CN101117261A has described a kind of mud spraying drying burning disposal technology.Mud by pump delivery, sprays into spray-drying tower inner drying dehydration through nozzle through after adding the water making beating; Dewatered sludge gets in the rotary incinerator and burns, and the flue gas of generation is introduced into and is used for dry wet mud in the spray-drying tower.Above-mentioned mud drying process with atomizing all adopts machinery or Pneumatic type nozzle, and nozzle atomization at present relatively is fit to handle LV liquid material such as water, milk and solution, and is difficult to handle HV cream pasty state municipal sludge.Therefore, in aforementioned drying process with atomizing, mud need add the water processing of pulling an oar, process the mud slurry after, carry out spraying drying through pump delivery to nozzle.But mud adds water to be processed mud slurry and will significantly increase moisture content in the mud, has improved the drying sludge energy consumption.For the low value municipal sludge, reduce its heat drying energy consumption is one of this area research focus always.In addition, applicating nozzle is to mud when atomizing slurry, and the fierceness friction between mud slurry and the nozzle will cause nozzle wear, need often to change nozzle, causes to stop work and reduce production efficiency.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of prior art, and the mud Rapid Thermal drying and other treatment device of direct atomizing of a kind of high temperature and high speed oscillatory surge air-flow that utilizes controlled explosive combustion device to produce and rapid drying mud is provided.
The utility model solves its technical problem and realizes through following technical scheme:
A kind of mud Rapid Thermal drying and other treatment device; It is characterized in that: be made up of controlled explosive combustion device, mud transfer mechanism, after drying device, controlled explosive combustion device is made up of combustion chamber, lighter for ignition, air inlet pipeline, gas inlet pipe road, tail pipe, chuck, and the combustion chamber is packed in the chuck; Be fixed with air inlet pipeline, gas inlet pipe road and lighter for ignition on the combustion chamber; Tail pipe is packed in the chuck, and tail pipe one end is connected with the combustion chamber, and the tail pipe the other end stretches out outside the chuck and is connected with the after drying device; The mud transfer mechanism is packed in top, chuck outside, and mud transfer mechanism end stretches in the chuck and is communicated with tail pipe.
And; Said mud transfer mechanism is made up of feed bin, helical screw feeder, buncher, material grid distributor; Helical screw feeder is packed on the chuck, and helical screw feeder is terminal to be connected with the interior tail pipe of chuck, and feed bin is packed in the helical screw feeder feed inlet end; The material grid distributor is packed in the helical screw feeder discharge port end, and buncher and helical screw feeder are in transmission connection.
And, be shaped on 6-15 millimeter mudhole 20-40 on the said material grid distributor.
And; Said after drying device upper part is a round shape; Lower part is conical, on first half barrel, is shaped on the tail gas import tangent with inwall, and the tail pipe the other end stretches out chuck and is connected to this tail gas import outward; After drying device top is shaped on the tail gas outlet, and after drying device bottom is shaped on the drying sludge particle outlet.
And the air admission passage becomes 90 ° of directions to arrange with the gas inlet pipe road on the combustion chamber, and lighter for ignition becomes 45 ° of directions to arrange with the gas inlet pipe road, and lighter for ignition becomes 135 ° of directions to arrange with the air inlet pipeline.
And said tail pipe is oval tubular, and the tail pipe diameter is 40-50mm, and tail pipe length is 1000mm to 3500mm.
And, on chuck, be shaped on air inlet, there is hot air duct to be communicated with between chuck and the after drying device.
And, on the said air inlet pipeline air flow controller being housed, said gas inlet pipe is equipped with the gas flow unit on the road.
And, at air inlet pipeline and gas inlet pipe Lu Shangjun the SV of controllable frequency is installed, the rotary valve by the driven by motor of controllable rotating speed perhaps is installed, supply with frequency and fuel gas supply frequency with control air.
Advantage of the utility model and beneficial effect are:
1. the utility model mud Rapid Thermal drying and other treatment device; The mud atomization drying need not add the water making beating; Save equipment such as hollander and pump on the one hand, save mud on the other hand and add energy consumption for drying and the pulping process machinery energy consumption that water increases, therefore; The utility model single unit system is simple in structure, and the sludge drying energy consumption is low.
2. the utility model mud Rapid Thermal drying and other treatment device; Owing to be that the tail gas stream of in controlled explosive combustion device tail pipe, being vibrated by HTHP atomizes to mud; Increased mud and air-flow contact area, on the other hand, because the high temperature (can reach 800 ℃) of tail gas stream and vibration are to the frictional belt role of tear of mud granule surface heat transmission; Tail gas stream and mud granule caloic transmission speed are fast, thereby can realize mud rapid drying.
3. the utility model mud Rapid Thermal drying and other treatment device, mud get into the shearing action that receives even impact air-flow behind the controlled explosive combustion device tail pipe, and it is centrifugal more even with pressure nozzle mud granule size to compare tradition.
4. the utility model mud Rapid Thermal drying and other treatment device, in the atomization drying process, because rapid drying, mud granule surface-moisture flash evapn, dried particle surface make mud granule be difficult for being stained with wall to mud granule in the burner tail pipe; In addition, because impact air-flow has the cleaning effect to the wall particle of being stained with on a small quantity of inner wall of liner, thereby it is very clean and tidy that inner wall of liner seems, avoided the common wall phenomenon of being stained with of spraying drying.
5. the utility model mud Rapid Thermal drying and other treatment device does not need nozzle, thus avoided other spraying dryings normal take place shut down phenomenon because of spray nozzle clogging and loss, improved production efficiency.
The utility model mud Rapid Thermal drying and other treatment device have simple in structure, dry fast, the mummification energy consumption is low, mud granule is big or small evenly, particle is difficult for being stained with advantages such as wall; And; It is simple that the heat drying treatment process has technology; Be easy to realize that effective advantage is a kind of mud Rapid Thermal drying and other treatment device that has than high innovation character.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the material distributing plate structure synoptic diagram of the utility model.
1-air inlet, 2-air inlet pipeline, 3-air flow controller, 4-lighter for ignition, 5-combustion chamber, 6-material grid distributor, 7-helical screw feeder, 8-feed bin, 9-buncher, 10-chuck, 11-tail pipe, the outlet of 12-hot air duct 13-tail gas, 14-after drying device, the outlet of 15-dried particles, 16-gas inlet pipe road, 17-gas flow unit, 18-mudhole.
Embodiment
Through specific embodiment the utility model is done further to detail below, following examples are descriptive, are not determinate, can not limit the protection domain of the utility model with this.
A kind of mud Rapid Thermal drying and other treatment device, it is made up of controlled explosive combustion device, mud transfer mechanism, after drying device 14, and controlled explosive combustion device is made up of combustion chamber 5, lighter for ignition 4, air inlet pipeline 2, gas inlet pipe road 16, tail pipe 11, chuck 10; The combustion chamber is packed in the chuck; Be fixed with gas inlet pipe road, air inlet pipeline and lighter for ignition on the combustion chamber, tail pipe is packed in the chuck, and an end is connected with the combustion chamber; One end stretches out outside the chuck and is connected with the after drying device; The mud transfer mechanism is packed in top, chuck outside, and mud transfer mechanism end stretches in the chuck and is communicated with tail pipe, and the after drying device is packed in the chuck outside; After drying device top is communicated with tail pipe, has hot air duct 12 to be communicated with between chuck and the after drying device.
The mud transfer mechanism is made up of feed bin 8, helical screw feeder 7, buncher 9, material grid distributor 6; Helical screw feeder is packed on the chuck; Helical screw feeder is terminal to be connected with the interior tail pipe of chuck; Feed bin is packed in the helical screw feeder feed inlet end, and the material grid distributor is packed in the helical screw feeder discharge port end, and buncher and helical screw feeder are in transmission connection.
Be shaped on 6-15 millimeter mudhole 18 (20-40) on the material grid distributor.
After drying device upper part is a round shape, and lower part is conical, on first half barrel, is shaped on the tail gas import tangent with inwall, and the top is shaped on tail gas outlet 13, and the bottom is shaped on drying sludge particle outlet 15.
The combustion chamber is the short cylinder shape, and in the side, combustion chamber, the air inlet pipeline becomes 90 ° of directions to arrange with the gas inlet pipe road, and lighter for ignition becomes 45 ° of directions to arrange with the gas inlet pipe road, and lighter for ignition becomes 135 ° of directions to arrange with the air inlet pipeline.
On the air inlet pipeline air flow controller is housed.The gas flow unit is housed on the gas inlet pipe road.At air inlet pipeline and gas inlet pipe Lu Shangjun the SV of controllable frequency is installed, the rotary valve by the driven by motor of controllable rotating speed perhaps is installed, supply with frequency and fuel gas supply frequency with control air.
Tail pipe is oval tubular, and the tail pipe diameter is 40-50mm, and tail pipe length is 1000mm to 3500mm, the tail pipe adjustable length, when tail pipe length not simultaneously, controlled combustion device running frequency is different.
Lighter for ignition adopts sparking plug or calrod form, and lighter for ignition is used for initial ignition, closes the air-breathing steady running of controlled explosive combustion device self-excitation after lighting a fire successfully.
Chuck, outer wall is handled through insulation, is shaped on air inlet on the chuck, has hot air duct to be communicated with between chuck and the after drying device.
The method that adopts this mud Rapid Thermal desiccation apparatus to carry out sludge treatment is:
(1) with the mud material feed bin of packing into, adopt spiral feed appliance to carry the mud material, through the material grid distributor mud is extruded into strip, this strip mud is delivered in the tail pipe of controlled explosive combustion device;
(2) gaseous fuel and air get into the combustion chamber mixing by air inlet pipeline and gas inlet pipe road off and on according to certain frequency; After lighting by lighter for ignition (igniting) first or from the high-temperature fuel gas that tail pipe refluxes; Explosive combustion also produces the tail gas stream of high temperature and high speed vibration; The strip sludge crushing is become fine particle, and the high temperature that utilizes blast to produce makes fine particle slough part moisture; The supply frequency of gaseous fuel is 40-100Hz.The supply frequency of air is 40-100Hz.Geseous fuel is consistent with air supply frequency.
(3) adopt the after drying device to utilize the waste heat of cyclone drying and controlled explosive combustion device that the fine particle of sloughing part moisture is dehydrated once more.
The acoustic resonance frequency of burner is a definite value, and size depends primarily on burner structure and size, and its calculation formula does.
F: the acoustic resonance frequency of burner
C: the velocity of sound under the chamber gas temperature (m/s),
A: tail pipe sectional area (m
2),
L: tail pipe length (m),
V: combustion chamber volume (m
3)
In the burner actual moving process,, make the burner running frequency equal the acoustic resonance frequency through accurate adjustment air and fuel feed frequency.At this moment, the burner interior flow field produces resonance, sound wave energy is maximum, and rate of combustion is accelerated to arrive deflagration state, and burner each item operating index is undergone mutation, and the burner that only is operated under this state just can be described as controlled explosive combustion device.When the burner running frequency is not equal to the acoustic resonance frequency, be common pulsation charge combustion device, general burning takes place in the combustion chamber, each item serviceability index is general.The burner that the utility model adopted is controlled explosive combustion device, and its running frequency, air and fuel feed frequency equal burner acoustic resonance frequency.Dimensional structure according to combustion chamber and tail pipe can budget go out the acoustic resonance frequency of burner, thereby provides the supply frequency of gaseous fuel and air.Also owing to the explosive combustion that this moment, the combustion chamber took place, the frequency of periodically exploding also equals burner acoustic resonance frequency.
The supply frequency of gaseous fuel and air can be through controllable frequency the switching of solenoid control vacuum breaker realize that also the folding of the driven by motor rotary valve through controllable rotating speed realizes.
In the present embodiment; Controlled explosive combustion device is interior according to certain acoustic resonance structure design; Adopt periodically explosive combustion mode; Compare with traditional stable state combustion device, have that intensity of combustion is big, efficiency of combustion is high (more than 98%), excess air factor is little, the combustion tail gas oxygen content is low, the heat transfer efficiency advantages of higher.Controlled pulsating combusting device power is 25 kilowatts, and testing fuel used is LPG liquefied petroleum gas (LPG), and when tail pipe length was 3.5 meters, controlled combustion device running frequency was 49.6 hertz.During running light, recording chamber gas temperature is that 1150 degree, tail pipe Outlet Gas Temperature are 650 degree.Other operational conditions during actual motion are following: 80% initial wet content sludge inlet amount is per hour 24 kilograms; The sewage sludge feed position is apart from terminal 0.5 meter, combustion chamber; When material grid distributor aperture is 6 millimeters; Record mud granule Suo Te diameter in the tail pipe exit and be respectively 1.39 millimeters, the mud granule moisture content is 55-57%.The residence time of mud granule in controlled explosive combustion device tail pipe is about 0.5 second, promptly in half second time, sloughs mud granule 25% moisture.Mud granule further is dried to moisture content about 17% in the after drying device, accomplish second at 7-10 whole time of drying.
The principle of work of the utility model mud Rapid Thermal drying and other treatment device is:
During the work of the utility model mud Rapid Thermal drying and other treatment device; Gaseous fuel and air get into the combustion chamber by air inlet pipeline and gas inlet pipe road off and on according to certain frequency; Gas flow and air flow quantity are respectively by the gas flow unit and the air flow controller control that is contained on the air inlet pipeline that are contained on the gas inlet pipe road; Get into combustion gas and air short mix in the combustion chamber; After gas mixture is lighted by lighter for ignition (igniting) first or from the high-temperature fuel gas that tail pipe refluxes, explosive combustion and produce high temperature, at a high speed, the impact tail gas stream of vibration.The high speed impact tail gas stream is discharged the combustion chamber through tail pipe.Buncher drives helical screw feeder the mud in the feed bin is carried, and is extruded into fine strip shape entering tail pipe through the material grid distributor of helical screw feeder exit end.In tail pipe, the high speed impact tail gas stream becomes tiny wet granular with the fine strip shape sludge crushing, and simultaneously, tiny wet granular and high-temperature tail gas stream contacts and sloughs part moisture.Dried fine particle gets into the after drying device with tail gas stream.(got into by air that gas can be air in the chuck, perhaps the gas mixture of air and part recycled offgas is mainly used in the heat that absorption burner wall distributes to get into air and part recycled offgas in the chuck by air.Waste gas with the part cyclonic separator is discharged after air mixed, gets into chuck from ingress.The purpose of introducing tail gas is to utilize the part using waste heat from tail gas) gas mixture, absorb controlled explosive combustion device and heat up through the heat that the high temperature outer wall distributes, warm air gets into the after drying device through hot air duct.The after drying device utilizes cyclone drying and through the warm air that hot air duct gets into the fine particle of sloughing part moisture that gets into tail gas is dehydrated once more.Through dehydrating of certain hour, tail gas outlet discharge gets into exhaust treatment system to tail gas from top, and the dried particles outlet gets into collecting device to the sludge-drying particle from the bottom.
The ultimate principle of the utility model mud Rapid Thermal drying and other treatment device is:
With the mud material feed bin of packing into, adopt spiral feed appliance to carry the mud material, through the material grid distributor mud is extruded into strip, this strip mud is delivered in the tail pipe of controlled explosive combustion device, and strip mud is convenient to impact into fine particle by the high speed tail gas stream.Gaseous fuel and air get into the combustion chamber by air inlet pipeline and gas inlet pipe road off and on according to certain frequency to be mixed; After lighting by lighter for ignition (igniting) first or from the high-temperature fuel gas that tail pipe refluxes; Explosive combustion also produces the tail gas stream of high temperature and high speed vibration, and tail gas stream becomes fine particle with the strip sludge crushing, and the high temperature that utilizes blast to produce makes fine particle moment slough part moisture to lose viscosity; Avoided particle to glue wall and inter-adhesive, be convenient to carry and the redrying dehydration.Adopt the after drying device to utilize the waste heat of cyclone drying and controlled explosive combustion device that the fine particle of sloughing part moisture is dehydrated once more; Tiny mud granule is under the blowing of high temperature gas flow; Fast rotational in the after drying device; Particle is the drying and the entering dried particles collecting device that progressively sinks more and more, and tail gas outlet discharge gets into exhaust treatment system to tail gas from top.
Claims (9)
1. mud Rapid Thermal drying and other treatment device; It is characterized in that: be made up of controlled explosive combustion device, mud transfer mechanism, after drying device, controlled explosive combustion device is made up of combustion chamber, lighter for ignition, air inlet pipeline, gas inlet pipe road, tail pipe, chuck, and the combustion chamber is packed in the chuck; Be fixed with air inlet pipeline, gas inlet pipe road and lighter for ignition on the combustion chamber; Tail pipe is packed in the chuck, and tail pipe one end is connected with the combustion chamber, and the tail pipe the other end stretches out outside the chuck and is connected with the after drying device; The mud transfer mechanism is packed in top, chuck outside, and mud transfer mechanism end stretches in the chuck and is communicated with tail pipe.
2. mud Rapid Thermal drying and other treatment device according to claim 1; It is characterized in that: said mud transfer mechanism is made up of feed bin, helical screw feeder, buncher, material grid distributor; Helical screw feeder is packed on the chuck, and helical screw feeder is terminal to be connected with the interior tail pipe of chuck, and feed bin is packed in the helical screw feeder feed inlet end; The material grid distributor is packed in the helical screw feeder discharge port end, and buncher and helical screw feeder are in transmission connection.
3. mud Rapid Thermal drying and other treatment device according to claim 2 is characterized in that: be shaped on 6-15 millimeter mudhole 20-40 on the said material grid distributor.
4. mud Rapid Thermal drying and other treatment device according to claim 1; It is characterized in that: said after drying device upper part is a round shape; Lower part is conical, on first half barrel, is shaped on the tail gas import tangent with inwall, and the tail pipe the other end stretches out chuck and is connected to this tail gas import outward; After drying device top is shaped on the tail gas outlet, and after drying device bottom is shaped on the drying sludge particle outlet.
5. mud Rapid Thermal drying and other treatment device according to claim 1; It is characterized in that: the air admission passage becomes 90 ° of directions to arrange with the gas inlet pipe road on the combustion chamber; Lighter for ignition becomes 45 ° of directions to arrange with the gas inlet pipe road, lighter for ignition becomes 135 ° of directions to arrange with the air inlet pipeline.
6. mud Rapid Thermal drying and other treatment device according to claim 1, it is characterized in that: said tail pipe is oval tubular, and the tail pipe diameter is 40-50mm, and tail pipe length is 1000mm to 3500mm.
7. mud Rapid Thermal drying and other treatment device according to claim 1 is characterized in that: on chuck, be shaped on air inlet, have hot air duct to be communicated with between chuck and the after drying device.
8. mud Rapid Thermal drying and other treatment device according to claim 1 is characterized in that: on the said air inlet pipeline air flow controller is housed, said gas inlet pipe is equipped with the gas flow unit on the road.
9. mud Rapid Thermal drying and other treatment device according to claim 1; It is characterized in that: the SV that controllable frequency is installed at air inlet pipeline and gas inlet pipe Lu Shangjun; Rotary valve by the driven by motor of controllable rotating speed perhaps is installed, supplies with frequency and fuel gas supply frequency with control air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205625082U CN202543016U (en) | 2011-12-29 | 2011-12-29 | Quick heat drying treatment device for sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205625082U CN202543016U (en) | 2011-12-29 | 2011-12-29 | Quick heat drying treatment device for sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202543016U true CN202543016U (en) | 2012-11-21 |
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ID=47163682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205625082U Expired - Fee Related CN202543016U (en) | 2011-12-29 | 2011-12-29 | Quick heat drying treatment device for sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202543016U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531323A (en) * | 2011-12-29 | 2012-07-04 | 天津科技大学 | Sludge fast heat drying treating device and sludge fast heat drying treating method |
| CN103420558A (en) * | 2013-08-12 | 2013-12-04 | 江苏大学 | Fast efficient sludge drying treatment system |
| CN103601354A (en) * | 2013-08-07 | 2014-02-26 | 徐炳荣 | Chain plate natural gas heating sludge drying device and sludge drying processing method |
-
2011
- 2011-12-29 CN CN2011205625082U patent/CN202543016U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531323A (en) * | 2011-12-29 | 2012-07-04 | 天津科技大学 | Sludge fast heat drying treating device and sludge fast heat drying treating method |
| CN103601354A (en) * | 2013-08-07 | 2014-02-26 | 徐炳荣 | Chain plate natural gas heating sludge drying device and sludge drying processing method |
| CN103601354B (en) * | 2013-08-07 | 2015-04-01 | 徐炳荣 | Chain plate natural gas heating sludge drying device and sludge drying processing method |
| CN103420558A (en) * | 2013-08-12 | 2013-12-04 | 江苏大学 | Fast efficient sludge drying treatment system |
| CN103420558B (en) * | 2013-08-12 | 2015-02-04 | 江苏大学 | Fast efficient sludge drying treatment system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20141229 |
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| EXPY | Termination of patent right or utility model |