CN219603423U - Vapour mud mixing arrangement - Google Patents
Vapour mud mixing arrangement Download PDFInfo
- Publication number
- CN219603423U CN219603423U CN202320584037.8U CN202320584037U CN219603423U CN 219603423 U CN219603423 U CN 219603423U CN 202320584037 U CN202320584037 U CN 202320584037U CN 219603423 U CN219603423 U CN 219603423U
- Authority
- CN
- China
- Prior art keywords
- mud
- sludge
- rotating shaft
- steam
- rollers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a steam-mud mixing device, which comprises a shell, a left rotating shaft and a right rotating shaft which are positioned in the same horizontal plane in the shell and are parallel to each other, wherein round table-shaped mud rollers are arranged on the left rotating shaft and the right rotating shaft, the two round table-shaped mud rollers face opposite directions and are provided with gaps H1 for mud to fall down, corresponding long strip steam nozzles are arranged above the two round table-shaped mud rollers, long strip steam nozzles face to the gap areas, a driving device drives the round table-shaped mud rollers on the driving device to rotate clockwise through the left rotating shaft, the left rotating shaft drives the right rotating shaft through a transmission pair to enable the round table-shaped mud rollers on the right rotating shaft to rotate anticlockwise, a mud inlet is arranged in the middle position of the upper part of the shell, and a mud outlet is arranged in the middle position of the lower part of the shell. The steam-mud mixing device has the advantages of good heat transfer effect, uniform heating of the mud, small steam consumption, short heating time and good continuous operation stability, can greatly improve the dehydration performance of biological mud, and expands the application range of anaerobic digestion.
Description
Technical Field
The utility model relates to the field of sludge thermal hydrolysis, in particular to a steam-sludge mixing device for a continuous sludge thermal hydrolysis system.
Background
Thermal hydrolysis of sludge is one of the emerging technologies for treating sludge that have emerged in China for more than ten years. The technology can improve the dehydration performance of the sludge and the anaerobic digestion efficiency of the sludge. The working principle of the sludge thermal hydrolysis technology is that dehydrated sludge with the water content of about 80% and saturated steam with the temperature of 150-260 ℃ and the pressure of 1.4-2.6 MPa are put into a closed reaction kettle, the sludge is heated by the steam, the floc structure of the sludge is destroyed, and intracellular organic matters are released, so that the solid organic matters can be hydrolyzed, and the improvement of the anaerobic digestion performance of the subsequent sludge and the deep mechanical dehydration of the sludge without adding a medicament are possible to reach about 35%.
The existing sludge thermal hydrolysis system mainly comprises an intermittent thermal hydrolysis system (such as CAMBI (Kang Bi) product), a continuous vertical baffle thermal hydrolysis system (such as Weily Exelys product) and a hot oil pipe type heating system (such as Ovivo waterLysoTherm product), wherein the intermittent thermal hydrolysis system represented by CAMBI is most widely applied.
a. Taking CAMBI product as an example, the intermittent thermal hydrolysis system comprises a preheating slurrying tank, a thermal hydrolysis reaction kettle and a pressure relief flash tank, wherein the main process comprises the steps of pumping dehydrated sludge with the dry solid content of 16-20% into the preheating slurrying tank to preheat to about 95 ℃, pumping the dehydrated sludge into the thermal hydrolysis reaction kettle to heat to about 160 ℃, reacting for 20-30 minutes at the temperature, sending the sludge into the pressure relief flash tank to cool to 100 ℃ after the reaction is completed, and continuing cooling to the temperature required by anaerobic digestion. However, such thermal hydrolysis systems and processes suffer from the following disadvantages: the steam is introduced into a large-volume preheating slurrying tank for preheating, and the solid content of the dehydrated sludge is up to 16-20%, so that the sludge is poor in heating uniformity and low in heat transfer efficiency in the heating process, thereby the heating time is long and the steam consumption is high; the continuous operation of the CAMBI product can be realized only by adopting a plurality of thermal hydrolysis reaction kettles, and the thermal hydrolysis reaction kettle has the advantages of complex process control and high equipment investment cost.
b. The continuous vertical baffle thermal hydrolysis system represented by Weily Exelys products mainly realizes the circulating flow of sludge in a vertical thermal hydrolysis reactor through arranging baffles in the vertical thermal hydrolysis reactor and realizing the required reaction time (about 20 min) through the steam lifting effect, and the technology has low heat transfer efficiency, poor heating uniformity, high steam consumption and poor continuous operation stability when treating high-solid-content sludge due to poor fluidity and miscibility of the high-solid-content sludge. If the solid content of the sludge is reduced, the sludge treatment capacity and the treatment energy consumption are obviously increased, and the treatment cost is higher.
c. The use of a hot oil pipe heater for heating the sludge, such as the Ovivo water LysoTherm product, also results in lower heat transfer efficiency due to the high viscosity and poor flowability of the high solids sludge, thereby increasing the manufacturing and operating costs of the apparatus.
It follows that the following problems are common in the treatment of high solids sludge with the equipment employed in the prior art high temperature thermal hydrolysis: poor heat transfer effect, uneven heating of materials, large steam consumption, long heating time and poor continuous operation stability, and thus the problems of high equipment investment cost, high treatment cost, poor treatment effect and the like are caused.
The patent application of the utility model with application number 201480058794.5 discloses a method and a device for continuous thermal hydrolysis with recycling of recovery steam, the device comprising at least one primary dynamic injector-mixer, at least one secondary dynamic injector-mixer, each having a chamber and a bladed rotor, by means of which the injection of recovery steam into the sludge and the mixing of the sludge with the recovery steam are carried out simultaneously to obtain a primary homogeneous mixture of preheated sludge; the primary homogeneous mixture is conveyed to a secondary dynamic injector-mixer having a chamber and a bladed rotor, and injection of live steam into the primary homogeneous mixture and mixing of the primary homogeneous mixture with the live steam are carried out simultaneously to obtain a secondary homogeneous mixture of sludge heated to a desired thermal hydrolysis temperature. According to the technical scheme, recycling continuous thermal hydrolysis can be performed by utilizing the recovered steam, the steam consumption is reduced to a certain extent, and energy is saved, but as the primary dynamic injector-mixer and the secondary dynamic injector-mixer are used for mixing the recovered steam and the sludge in the primary chamber by utilizing the rotor with the blades, the defects of poor heat transfer effect, uneven material heating, large steam consumption and the like still exist, so that the secondary dynamic injector-mixer has to be additionally arranged, and fresh steam and the sludge are mixed in the secondary chamber, so that the sludge heated to the desired thermal hydrolysis temperature is obtained.
How to effectively solve the problems, a steam-mud mixing device which utilizes recovered steam and has good heat transfer effect, good material heating uniformity, small steam consumption, short heating time and good continuous operation stability is obtained, and has important significance for improving the harmless, stable, reduction and recycling application range of biological sludge treatment.
Disclosure of Invention
The utility model aims to provide a steam-mud mixing device which has the advantages of good heat transfer effect, uniform mud heating, small steam consumption, short heating time and good continuous operation stability, can greatly improve the biological mud dehydration performance, and expands the application range of anaerobic digestion.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a vapour mud mixing arrangement, includes the casing, is located the left pivot and the right pivot of same horizontal plane and mutual parallel in the casing all be equipped with round platform shape mud roller in left pivot and the right pivot, two round platform shape mud roller orientation is opposite and have the clearance H1 that makes mud whereabouts between the two, and the top of two round platform shape mud rollers all is equipped with corresponding rectangular steam nozzle, rectangular steam nozzle's long and thin spout orientation the clearance region, drive arrangement is through the clockwise rotation of round platform shape mud roller on the left pivot drive, left pivot drive right pivot so that the anticlockwise rotation of right pivot round platform shape mud roller is equipped with the mud import through the drive pair, casing upper portion intermediate position, casing lower part intermediate position is equipped with the mud export.
The driving device comprises a motor and a speed reducer; the transmission pair is a gear set transmission pair; each round platform-shaped mud roller is provided with a right-handed spiral mud scraping plate.
Compared with the prior art, the utility model has the beneficial effects that: due to the adoption of the technical scheme, the circular truncated cone-shaped mud rollers are arranged on the left rotating shaft and the right rotating shaft which are parallel to each other, the directions of the two circular truncated cone-shaped mud rollers are opposite and the directions of the two circular truncated cone-shaped mud rollers are opposite, the corresponding long steam nozzles are arranged above the two circular truncated cone-shaped mud rollers, and the long and thin nozzles of the two long steam nozzles face the gap area between the two circular truncated cone-shaped mud rollers, so that when the sludge falls from the sludge inlet, the two circular truncated cone-shaped mud rollers with upper parts rotating towards the gap direction are pushed to fall towards the central area of the inner cavity of the shell under the action of gravity and centrifugal force because the rotation linear speed of the big end of the circular truncated cone-shaped mud rollers is higher than the rotation linear speed of the small end of the circular truncated cone-shaped mud rollers; meanwhile, two streams of steam are alternately sprayed to the gap H1 area from left and right long steam nozzles, only the sludge in the gap H1 area of the circular truncated cone-shaped mud roller is fully mixed and heated, the heat transfer effect is good, the uniformity of heating the sludge is good, the steam consumption is small, the heating time is short, the continuous operation stability is good, the steam energy consumption used for thermal hydrolysis of the sludge is known as the main factor influencing the operation cost, the steam-mud mixing device can improve the heat efficiency by about 10% in a smaller space, the sludge preheating temperature reaches 120-140 ℃, the consumption of steam generated by a heat source is greatly reduced, the subsequent sludge dewatering performance is improved, the application range of anaerobic digestion is expanded, and the major technological breakthrough in the field is realized; in the heating process, steam also washes sludge on the circular truncated cone-shaped mud roller to roll to the gap H1 clockwise (counter) and further promotes heated sludge to fall from a sludge outlet at the middle position of the lower part of the shell smoothly to enter a high Wen Shu mud pump, and under the combined action that the circular truncated cone-shaped mud roller pushes sludge to the middle part and the left and right long steam nozzles are used for cross spraying to the gap H1 area, the sludge accumulation on the cavity wall of the shell is not increased, and the technical guarantee is provided for continuously and stably outputting the heated sludge. Compared with the prior various modes of recovering steam and preheating sludge, different preheating methods such as a preheating slurrying tank and the like all adopt a tank (kettle) mode, and the tank has the advantages of large structural volume, high manufacturing cost and poor thermal efficiency. The technical scheme has the remarkable characteristics and beneficial effects of miniaturization of the structure, continuous operation, large heat efficiency gain and low manufacturing cost under the condition of the sludge thermal hydrolysis process.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a left side cross-sectional view of FIG. 1;
FIG. 3 is a top view of the two cone-shaped mud rollers of FIG. 2;
FIG. 4 is a schematic view of the relationship between the circular truncated cone shaped mud roll and the corresponding elongated steam nozzle above the circular truncated cone shaped mud roll in FIGS. 1 and 2;
FIG. 5 is a schematic view of the construction of the elongated steam nozzle of FIG. 4;
FIG. 6 is a view in the direction A of FIG. 5;
FIG. 7 is a B-B cross-sectional view of FIG. 5;
FIG. 8 is a schematic diagram of a connection structure of a sludge thermal hydrolysis system using the present utility model.
The technical features represented by the reference numerals in the figures are as follows:
the device comprises an organic sludge source 1, a preheater 2, a spiral cone steam-mud mixing device 3, a left rotating shaft 301, a right rotating shaft 302, a sludge inlet 31, a sludge outlet 311, a shell 32, a speed reducer 33, a long steam nozzle 34, a recovery steam pipeline 341, a long nozzle 342, a circular truncated cone-shaped mud roller 35, a spiral mud scraper 351, a gap H1, a high Wen Shu mud pump 4, a thermal hydrolysis reaction system 5, a steam recovery device 6, a pyrolytic sludge cooling system 7, a sludge anaerobic digestion system 8, a sludge deep dehydration system 9, a reclaimed water source 10 and a heat source 11.
Detailed Description
In order to make the technical scheme of the present utility model clearer, the present utility model will be described in detail with reference to fig. 1 to 8. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
The utility model relates to a steam-mud mixing device, which comprises a shell 32, a left rotating shaft 301 and a right rotating shaft 302 which are positioned in the same horizontal plane in the shell 32 and are parallel to each other, wherein round platform-shaped mud rollers 35 are arranged on the left rotating shaft 301 and the right rotating shaft 302, gaps H1 for enabling mud to fall down are formed between the two round platform-shaped mud rollers 35, corresponding long strip steam nozzles 34 are arranged above the two round platform-shaped mud rollers 35, long strip steam nozzles 342 face the gap areas, a driving device drives the round platform-shaped mud rollers 35 on the long strip steam nozzles 34 to rotate clockwise through the left rotating shaft 301, the left rotating shaft 301 drives the right rotating shaft 302 through a transmission pair to enable the round platform-shaped mud rollers 35 on the right rotating shaft 302 to rotate anticlockwise, a mud inlet 31 is formed in the middle of the upper part of the shell 32, and a mud outlet 311 is formed in the middle of the lower part of the shell 32.
Preferably, the driving device comprises a motor and a speed reducer 33; the transmission pair is a gear set transmission pair, and the transmission ratio between the left rotating shaft 301 and the right rotating shaft 302 is 1: (0.75-1.25); each circular truncated cone-shaped mud roller 35 is provided with a right-handed spiral mud scraping plate 351.
As further optimization, three spiral mud scraping plates 351 are uniformly distributed on each circular truncated cone-shaped mud roller 35, the pitch of each spiral mud scraping plate 351 is 18-22 mm, the height is 0.5-0.75 pitch, the cross section of each spiral mud scraping plate 351 is trapezoid or rectangular, and the unfolded longitudinal section is rectangular or zigzag. The included angle between the recovered steam pipeline GA341 extending into the shell 32 and the horizontal plane is 45 degrees, the middle position of the upper part of the shell 32 is provided with a sludge inlet 31, and the middle position of the lower part of the shell 32 is provided with a sludge outlet 311. The cone angle of the round table shaped mud roller 35 is 10-20 degrees, preferably 16 degrees, the outer diameter of the big head is GH pipeline inner diameter D, the round table height H is D+50mm, D is more than or equal to 80mm and less than or equal to 200mm, and the gap H1 is 20-40 mm, preferably 30mm.
Example 2
The steam-mud mixing device for the continuous thermal hydrolysis system comprises a shell 32, a left rotating shaft 301 and a right rotating shaft 302 which are positioned in the same horizontal plane in the shell 32 and are parallel to each other, wherein the left rotating shaft 301 and the right rotating shaft 302 are respectively provided with a round platform-shaped mud roller 35, two round platform-shaped mud rollers 35 are opposite in orientation and have a gap H1 between the two round platform-shaped mud rollers for enabling mud to fall, each round platform-shaped mud roller 35 is provided with a right-handed spiral mud scraping plate 351, corresponding long-strip steam nozzles 34 are arranged above the two round platform-shaped mud rollers 35, long-strip steam nozzles 342 face the gap area, a driving device drives the round platform-shaped mud rollers 35 on the long-strip steam nozzles 34 to rotate clockwise through the left rotating shaft 301, the left rotating shaft 301 drives the right rotating shaft 302 through a transmission pair (for example, a gear set) to enable the round platform-shaped mud rollers 35 on the right rotating shaft 302 to rotate anticlockwise, an air inlet of the long-strip steam nozzles 34 is connected with a recovery steam outlet of a steam recovery steam pipeline GA341, preferably, the recovery steam pipeline GA extending into the shell 32 forms an included angle of 45 degrees with the horizontal plane, the middle position of the shell 32 is provided with a mud outlet 311, and the middle position of the shell 32 is provided with a sludge outlet 311 is arranged below the middle position.
The cone angle of the round table shaped mud roller 35 is 10-20 degrees, preferably 16 degrees, the outer diameter of the big head is GH pipeline inner diameter D, the round table height H is D+50mm, D is more than or equal to 80mm and less than or equal to 200mm, and the gap H1 is 20-40 mm, preferably 30mm.
The number of the spiral mud scraping plates 351 uniformly distributed on each circular truncated cone-shaped mud roller 35 is three, the pitch of the spiral mud scraping plates 351 is 18-22 mm, and the height is 0.5-0.75 pitch.
The spiral mud scraping plate 351 has a trapezoid or rectangle cross section, and the unfolded longitudinal section is rectangular or zigzag.
The driving device comprises a motor and a speed reducer 33, and the transmission ratio between the left rotating shaft 301 and the right rotating shaft 302 is 1: (0.75-1.25).
The sludge inlet 31 of the spiral cone steam-sludge mixing device 3 is connected with the organic sludge source 1 through a pipeline GH, a preheater 2 is arranged on the pipeline GH, a sludge outlet 311 is connected with a sludge inlet of a high Wen Shu sludge pump 4, a sludge outlet of the high Wen Shu sludge pump 4 is connected with a sludge inlet of a continuous thermal hydrolysis reaction system 5 through a pipeline GB, a sludge outlet of the continuous thermal hydrolysis reaction system 5 is connected with a sludge inlet of a steam recovery device 6 through a pipeline GC, a sludge outlet of the steam recovery device 6 is connected with a sludge inlet of a pyrolysis sludge cooling system 7 through a pipeline GD, a thermal mass outlet of the pyrolysis sludge cooling system 7 is connected with a thermal mass inlet of the preheater 2 through a recovered heat energy pipeline GE, a sludge outlet of the pyrolysis sludge cooling system 7 is connected with a sludge anaerobic digestion system 8 or a sludge deep dehydration system 9 through a pipeline GF, and a reclaimed water source 10 is connected with a water inlet of the pyrolysis sludge cooling system 7 through a pipeline GG.
The hot steam required for the continuous thermal hydrolysis reaction system 5 is supplied from a heat source 11 through a pipe GI.
The technical scheme of the utility model is further innovation and improvement of the inventor's prior utility model patent ZL201911177744.X ' a method for thermal hydrolysis of sludge '. Compared with the prior art, the beneficial effects are as follows: by adopting the technical scheme, the left rotating shaft and the right rotating shaft which are parallel to each other are respectively provided with the round platform-shaped mud rollers, the directions of the two round platform-shaped mud rollers are opposite and the directions of the two round platform-shaped mud rollers are opposite, the upper parts of the two round platform-shaped mud rollers are respectively provided with the corresponding long strip steam nozzles, and the long strip nozzles of the two long strip steam nozzles face the gap area between the two round platform-shaped mud rollers. Meanwhile, two streams of steam from a steam recovery device are alternately sprayed in a gap H1 area from left and right long steam nozzles, only the sludge in the gap H1 area of a circular truncated cone-shaped mud roller is fully mixed and heated, the heat transfer effect is good, the heating uniformity of the sludge is good, the steam consumption is small, the heating time is short, the continuous operation stability is good, the steam energy consumption used for thermal hydrolysis of the sludge is known as the main factor influencing the operation cost, according to the size (sludge conveying amount) of a sludge pipeline GB, the spiral cone steam-mud mixing device for recycling the heat energy of the continuous hot water of the sludge can improve the heat efficiency by about 10 percent in a smaller space by only utilizing the waste heat of the thermal hydrolysis reaction of the sludge, the sludge preheating temperature reaches 120-140 ℃, the consumption of steam generated by a heat source is greatly reduced, the subsequent sludge dewatering performance is improved, the application range of anaerobic digestion is expanded, and the important technological breakthrough in the field is realized; in the heating process, steam also washes sludge on the circular truncated cone-shaped mud roller to roll to the gap H1 clockwise (counter) and further promotes heated sludge to fall from a sludge outlet at the middle position of the lower part of the shell smoothly to enter a high Wen Shu mud pump, and under the combined action that the circular truncated cone-shaped mud roller pushes sludge to the middle part and the left and right long steam nozzles are used for cross spraying to the gap H1 area, the sludge accumulation on the cavity wall of the shell is not increased, and the technical guarantee is provided for continuously and stably outputting the heated sludge. Compared with the prior various modes of recovering steam and preheating sludge, different preheating methods such as a preheating slurrying tank and the like all adopt a tank (kettle) mode, and the tank has the advantages of large structural volume, high manufacturing cost and poor thermal efficiency. The technical scheme has the remarkable characteristics and beneficial effects of miniaturization of the structure, continuous operation, large heat efficiency gain and low manufacturing cost under the condition of the sludge thermal hydrolysis process.
Claims (2)
1. The utility model provides a vapour mud mixing arrangement, includes casing (32), is located the same horizontal plane in casing (32) and left pivot (301) and right pivot (302) that are parallel to each other, its characterized in that: the left rotary shaft (301) and the right rotary shaft (302) are respectively provided with a circular truncated cone-shaped mud roller (35), two circular truncated cone-shaped mud rollers (35) face opposite directions and are provided with gaps (H1) for enabling mud to fall down, corresponding long steam nozzles (34) are arranged above the two circular truncated cone-shaped mud rollers (35), long nozzles (342) of the long steam nozzles (34) face the gap areas, the driving device drives the circular truncated cone-shaped mud rollers (35) on the driving device to rotate clockwise through the left rotary shaft (301), the left rotary shaft (301) drives the right rotary shaft (302) to enable the circular truncated cone-shaped mud rollers (35) on the right rotary shaft (302) to rotate anticlockwise through a transmission pair, a mud inlet (31) is formed in the middle position of the upper portion of a shell (32), and a mud outlet (311) is formed in the middle position of the lower portion of the shell (32).
2. The soda ash mixing device of claim 1, wherein: the driving device comprises a motor and a speed reducer (33); the transmission pair is a gear set transmission pair; each round platform-shaped mud roller (35) is provided with a right-handed spiral mud scraping plate (351).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320584037.8U CN219603423U (en) | 2023-03-23 | 2023-03-23 | Vapour mud mixing arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320584037.8U CN219603423U (en) | 2023-03-23 | 2023-03-23 | Vapour mud mixing arrangement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219603423U true CN219603423U (en) | 2023-08-29 |
Family
ID=87756304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320584037.8U Active CN219603423U (en) | 2023-03-23 | 2023-03-23 | Vapour mud mixing arrangement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219603423U (en) |
-
2023
- 2023-03-23 CN CN202320584037.8U patent/CN219603423U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111547975B (en) | Method for separating active sludge biomass by high-speed mechanical cyclone | |
| CN103072985B (en) | Continuous alkali activation device and method for preparing activated carbon with high specific surface area | |
| CN101549945B (en) | Set treatment device of sludge drying | |
| CN103591781B (en) | The continuous drying system of slurry or powder | |
| CN107746168B (en) | Sludge low-cost innocent treatment device | |
| CN202492442U (en) | Reversely inclined and staggered mutual cleaning turntable type sludge dryer | |
| CN201795667U (en) | Novel energy-saving pomace drying device | |
| CN111558611B (en) | Negative pressure thermal desorption treatment system for mercury contaminated soil | |
| CN109382040A (en) | A kind of biomass ingredient granulator | |
| CN106582422B (en) | Quicklime digestion equipment and method for desulfurization of coke oven flue gas | |
| CN219603423U (en) | Vapour mud mixing arrangement | |
| CN201923936U (en) | Rotary disk type high-viscosity sludge drying equipment | |
| CN203657414U (en) | Film drying machine | |
| CN103913049A (en) | Slurry or powder continuous drying system | |
| CN116425394A (en) | Spiral cone steam-mud mixing device for continuous thermal hydrolysis system of sludge | |
| CN104976873A (en) | Continuous drying system of slurry or powder and working method of continuous drying system | |
| CN204224558U (en) | High-concentration coal-water slurry preparation system | |
| CN207537320U (en) | A kind of efficient municipal sludge drying breaking means | |
| CN204470272U (en) | For changing food waste heating hydrolysis equipment | |
| CN211367364U (en) | Deep dehydration system for oily sludge | |
| CN207192802U (en) | A kind of system for producing calcium carbide | |
| CN201386056Y (en) | Complete set of treatment device for sludge drying | |
| CN108362118A (en) | A kind of drying equipment and its drying means of aluminium polychloride class series salt | |
| CN201326001Y (en) | Closed desulphurization and dissociation reaction vessel and system thereof | |
| CN212924774U (en) | Sludge treatment system is with integrative desiccator between straightening |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |