CN109851199B - Kiln cooperative harmless treatment system and technology for platy domestic sludge - Google Patents
Kiln cooperative harmless treatment system and technology for platy domestic sludge Download PDFInfo
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- CN109851199B CN109851199B CN201910075626.1A CN201910075626A CN109851199B CN 109851199 B CN109851199 B CN 109851199B CN 201910075626 A CN201910075626 A CN 201910075626A CN 109851199 B CN109851199 B CN 109851199B
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- 239000010802 sludge Substances 0.000 title claims abstract description 170
- 241000276425 Xiphophorus maculatus Species 0.000 title claims abstract description 36
- 238000005516 engineering process Methods 0.000 title abstract description 6
- 239000007789 gas Substances 0.000 claims description 112
- 239000000843 powder Substances 0.000 claims description 76
- 239000000428 dust Substances 0.000 claims description 57
- 238000010298 pulverizing process Methods 0.000 claims description 48
- 239000002245 particle Substances 0.000 claims description 43
- 238000001035 drying Methods 0.000 claims description 42
- 238000000926 separation method Methods 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 32
- 238000000034 method Methods 0.000 claims description 32
- 239000007787 solid Substances 0.000 claims description 32
- 210000002445 nipple Anatomy 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 26
- 238000007599 discharging Methods 0.000 claims description 25
- 239000002912 waste gas Substances 0.000 claims description 17
- 206010006223 Breast discharge Diseases 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 238000004332 deodorization Methods 0.000 claims description 9
- 238000000354 decomposition reaction Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 238000005979 thermal decomposition reaction Methods 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 description 11
- 230000009467 reduction Effects 0.000 description 5
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Treatment Of Sludge (AREA)
Abstract
The invention discloses a kiln cooperative harmless treatment system and technology for platy domestic sludge, which have compact structural layout and small occupied area, solve the problem of cooperative treatment and conveying of platy sludge kilns, save cost and are convenient to operate.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a kiln cooperation harmless treatment system and technology for platy domestic sludge.
Background
At present, along with the gradual increase of daily water consumption, the daily sewage treatment capacity of a sewage treatment plant is also gradually increased, a large amount of sludge is correspondingly generated in the sewage treatment process, and in the sludge treatment process, the sludge is randomly piled up, so that the environment is attractive, and the environment pollution is caused. Accordingly, there is a need to provide an efficient sludge treatment apparatus and method.
The main technology for cooperatively disposing living organic sludge in the cement kiln at present in China is to directly pump sludge with the water content of 80% into the kiln tail of the rotary kiln by a sludge pump for incineration disposal. However, as the cost of sludge disposal increases, sludge reduction is carried out in a sewage treatment plant, and the yield of plate-shaped sludge dehydrated to 60% is increased. However, the sludge pump is not suitable for conveying plate-shaped sludge, and water is added to increase the water content of the sludge to more than 80% for conveying, so that energy waste is caused, and the cost is increased. The sludge treatment method at the present stage is mainly realized by sludge reduction delivery, but the treatment mode of the reduction delivery can cause the rising of sludge treatment cost and the increase of cost, so that the popularization and development of sludge reduction are severely limited. In addition, the existing sludge treatment system and device are complex in structure, large in occupied area, complex in operation process, difficult to control and unfavorable for popularization and use.
Therefore, the kiln cooperation harmless treatment system and the technology for plate-shaped domestic sludge, which have the advantages of simple structure, small occupied area and low treatment cost, are the problems to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the invention provides a kiln cooperation harmless treatment system and a kiln cooperation harmless treatment process for plate-shaped domestic sludge, which have compact structural layout and small occupied area, solve the problem of cooperative treatment and conveying of the plate-shaped sludge kiln, save cost and are convenient to operate.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The kiln cooperation harmless treatment system for the platy domestic sludge is characterized by comprising a crushing system, a first conveying system, a gas drying and pulverizing machine, a gas-solid separation system, a storage bin, a second conveying system and a rotary kiln;
the crushing system comprises a feeding device and a crusher, wherein the downstream of the feeding device is communicated with the crusher, and a discharge hole of the crusher is communicated with the first conveying system;
The first conveying system is communicated with the crusher discharge port at the upstream and communicated with the gas drying and pulverizing machine at the downstream;
the gas drying and pulverizing machine comprises a wet sludge particle inlet, a hot air inlet and a material gas outlet; the wet sludge particle inlet is communicated with the downstream of the screw conveyor, the hot air inlet is used for introducing hot air, and the material gas outlet is communicated with the gas-solid separation system;
The gas-solid separation system comprises a cyclone collector and a cloth bag dust collector; the cyclone collector comprises a material gas inlet, a first sludge dry powder outlet and a dust-containing gas outlet, wherein the material gas inlet is communicated with the material gas outlet, the first sludge dry powder outlet is communicated with the storage bin, and the dust-containing gas outlet is communicated with the bag dust collector; the cloth bag dust collector comprises a dust-containing gas inlet, a second sludge dry powder outlet and an exhaust gas outlet, wherein the dust-containing gas inlet is communicated with the dust-containing gas outlet, the second sludge dry powder outlet is communicated with the storage bin, and the exhaust gas outlet is communicated with the rotary kiln;
the storage bin comprises a sludge dry powder inlet and a sludge dry powder outlet, the sludge dry powder inlet is communicated with the first sludge dry powder outlet and the second sludge dry powder outlet, and the sludge dry powder outlet is communicated with the second conveying system;
the second conveying system is communicated with the sludge dry powder outlet at the upstream, and is communicated with the rotary kiln at the downstream.
The beneficial effects of the above preferable technical scheme are as follows: according to the invention, the kiln cooperation harmless treatment of the platy domestic sludge can be realized through the mutual coordination of the crushing system, the first conveying system, the gas drying and pulverizing machine, the gas-solid separation system, the storage bin, the second conveying system and the rotary kiln, and the requirements of different sludge treatment capacities can be met. The treatment system disclosed by the invention has the characteristics of intelligence, simplicity in operation, small occupied area and cost saving, can realize pretreatment of the platy sludge with the water content of about 60%, and can solve the problem of cooperative treatment and transportation of the platy sludge kiln.
Preferably, the feeding device is a grab bucket, and the crusher is a fine crusher.
The beneficial effects of the above preferable technical scheme are as follows: the grab bucket is used as the feeding device, so that the feeding purpose can be conveniently realized, the occupied area of the equipment is small, the automatic control is convenient, and the coordination with other devices can be conveniently realized; the invention adopts the fine crushing machine to realize the purpose of crushing efficiently and rapidly.
Preferably, the first conveying system comprises a belt conveyor and a screw conveyor, wherein the upstream of the belt conveyor is communicated with the outlet of the crusher, the downstream of the belt conveyor is communicated with the feeding port of the screw conveyor, and the downstream of the screw conveyor is communicated with the gas drying and pulverizing machine.
The beneficial effects of the above preferable technical scheme are as follows: according to the invention, the belt conveyor and the screw conveyor are matched with each other, so that the materials can be conveyed from the crusher outlet to the gas drying and pulverizing machine, and the devices are matched with each other, so that the automatic control can be realized.
Preferably, the second conveying system comprises a scraper conveyor, a bucket elevator and a screw conveyor, wherein the upper stream of the scraper conveyor is communicated with the sludge dry powder outlet, the lower stream of the scraper conveyor is communicated with the bucket elevator, the lower stream of the bucket elevator is communicated with the screw conveyor, and the lower stream of the screw conveyor is communicated with the rotary kiln.
The beneficial effects of the above preferable technical scheme are as follows: according to the invention, the scraper conveyor, the bucket elevator and the screw conveyor are mutually matched, so that the material can be conveyed from the sludge dry powder outlet to the rotary kiln, and the kiln cooperative harmless treatment process of the platy domestic sludge is realized.
Preferably, the cloth bag dust collector is an anti-sticking cloth bag dust collector.
The beneficial effects of the above preferable technical scheme are as follows: the anti-sticking cloth bag dust collector can prevent dust from adhering in the cloth bag dust collector, so that the treatment effect is affected, the loss of the device is increased, and the service life of the device is reduced.
Preferably, the device further comprises a negative pressure deodorization system, wherein the negative pressure deodorization system is matched with the crushing system, the first conveying system, the gas drying and pulverizing machine, the gas-solid separation system, the storage bin, the second conveying system and the rotary kiln.
The beneficial effects of the above preferable technical scheme are as follows: the invention can treat the polluted gas generated by each part through the negative pressure deodorization system, prevent the diffusion of odor and harmful gas, treat the odor and the harmful gas, and treat the waste gas from the bag dust collector when the rotary kiln is stopped.
Preferably, the gas drying and pulverizing machine comprises a wet sludge particle inlet, a hot air inlet, a material gas outlet, a feeding nipple cylinder, a middle nipple cylinder, a discharging nipple cylinder, a lining plate assembly, a feeding pipe, an air inlet pipe, a discharging pipe, a main shaft, a shaft sleeve, large blades, small blades, discharging blades, a shaft sleeve and a wear-resistant partition ring;
The feeding nipple cylinder body, the middle nipple cylinder body and the discharging nipple cylinder body are sequentially connected through flanges, the flanges are installed in a matched mode with the sealing gasket, sealing glue is smeared on the flanges and the sealing gasket, and lining plate assemblies are arranged inside the feeding nipple cylinder body and the middle nipple cylinder body;
The feeding pipe and the air inlet pipe are welded on the feeding short joint cylinder, the feeding pipe is communicated with the wet sludge particle inlet, and the air inlet pipe is communicated with the hot air inlet;
The discharging pipe is welded on the side wall of the discharging short section cylinder body and is perpendicular to the central axis of the discharging short section cylinder body, and the discharging pipe is communicated with the material gas outlet;
The main shaft penetrates through the central axes of the feeding nipple barrel, the middle nipple barrel and the discharging nipple barrel, and the main shaft, the feeding nipple barrel and the discharging nipple barrel are respectively connected with the sealing device;
A pair of angle contact ball bearing devices are assembled at two ends of the main shaft, the main shaft is in power connection with the secondary motor through the bearing devices, the shaft sleeve is sleeved on the main shaft, the key is mounted on the shaft sleeve in a matched mode, the big blade, the small blade and the discharging blade are mounted on the key, the big blade and the small blade are sequentially and alternately arranged, and the discharging blade and the discharging pipe are located on the same plane;
the wear-resistant spacer ring is arranged on the lining plate assembly and is concentrically arranged with the small blades.
A wind and material channel is formed between the big blade and the blade assembly, a wind and material channel is formed between the small blade and the wear-resistant partition ring, the main shaft is driven by the secondary motor to rotate at a high speed, and the dried sludge powder is carried out by the discharge blade rotating at the high speed and the wind.
The kiln cooperation harmless treatment process of the platy domestic sludge adopts the kiln cooperation harmless treatment system of platy domestic sludge, and specifically comprises the following steps of:
(1) Firstly, crushing the plate-shaped sludge by adopting a fine crusher to obtain sludge particles;
(2) Conveying the crushed sludge particles to a gas drying and pulverizing machine, and introducing hot air to carry out drying and further pulverization treatment to obtain a mixture gas consisting of sludge powder and gas;
(3) Introducing the mixture gas into a gas-solid separation system for gas-solid separation to obtain waste gas and sludge dry powder respectively;
(4) And conveying the dry sludge powder to a rotary kiln for burning after passing through a storage bin, and directly introducing waste gas into the rotary kiln for thermal decomposition.
The beneficial effects of the above preferable technical scheme are as follows: the treatment process disclosed by the invention relies on the kiln cooperation harmless treatment system of the platy domestic sludge for treatment, has the advantages of simple process flow, high treatment efficiency, high automation degree of the whole process, manpower and material resources saving, and can effectively avoid releasing harmful gas to the external environment, thereby meeting the environmental protection requirement.
Preferably, in the step (1), the powder is crushed to a particle size of less than 20mm.
Preferably, in the step (1), the particles are crushed to a particle size of 3-15 mm.
The beneficial effects of the above preferable technical scheme are as follows: the invention is favorable for drying and pulverizing treatment by pulverizing the platy sludge to the particle size smaller than 20mm through the fine pulverizing crusher, and the pulverization to the particle size of 3-10 mm can ensure the speed of accelerating pulverization and drying, reduce the workload of pulverizing by adopting the fine pulverizing crusher and save the cost.
Preferably, the main shaft rotating speed of the gas drying and pulverizing machine is set to 1500r/min-3000r/min in the step (2), and the temperature of the hot air is 55-70 ℃; the grain diameter of the sludge powder obtained in the step (2) is 50-300 mu m, and the water content of the sludge powder is less than 25%.
The beneficial effects of the above preferable technical scheme are as follows: the invention can realize quick and efficient drying and pulverization processes by setting reasonable pulverizing blade rotation speed and hot air temperature, and quicken working efficiency. The temperature is lower than the temperature required by the synthesis of the dioxin (the synthesis temperature of the dioxin is 200-450 ℃) during the sludge drying, and the dried sludge is also burnt at high temperature in a rotary kiln and provided with a certain heat value, so that harmless recycling treatment can be realized.
Preferably, in the step (3), the mixture gas is firstly introduced into a cyclone collector for gas-solid separation to obtain dry sludge powder and dust-containing gas respectively, and the dust-containing gas is continuously introduced into a bag dust collector for gas-solid separation to obtain dry waste gas and dry sludge powder respectively.
The beneficial effects of the above preferable technical scheme are as follows: according to the invention, the cyclone collector is utilized to perform preliminary separation to obtain the dry sludge powder and the dust-containing gas, and then the dust-containing gas is subjected to gas-solid separation through the bag dust collector to obtain the dry waste gas and the dry sludge powder respectively, so that the separation of the gas and the solid sludge powder can be fully realized, and the treatment effect is improved.
Preferably, the decomposition temperature in the step (4) is greater than 850 DEG C
The above preferable technical scheme has the beneficial effects that the decomposition temperature is set to be higher than 850 ℃, so that the sludge dry powder can be ensured to be fully decomposed.
Compared with the prior art, the invention discloses a kiln collaborative harmless treatment system and a kiln collaborative harmless treatment process for platy domestic sludge, and the process method adopts highly integrated intelligent control, is simple and convenient to operate, and has compact structural layout and small occupied area compared with other conveying modes of pipeline conveying into a kiln. The gas drying and pulverizing machine and the integrated equipment thereof can achieve the aim of pretreatment of the platy sludge with the water content of 60 percent, solve the problem of cooperative treatment and transportation of the platy sludge kiln and save the cost. The gas enters the rotary kiln for high-temperature incineration, the temperature is lower than the temperature required by the synthesis of the dioxin (the synthesis temperature of the dioxin is 200-450 ℃) when the sludge is dried, and the dried sludge also enters the rotary kiln for high-temperature incineration, so that harmless treatment can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a kiln co-innocent treatment system for platy domestic sludge, which is provided by the invention;
fig. 2 is a schematic structural diagram of a gas drying and pulverizing machine provided by the invention;
fig. 3 is a schematic diagram showing a structure of a gas drying and pulverizing machine according to the present invention.
In the figure: 1 is a crusher, 2 is a belt conveyor, 3 is a screw conveyor, 4 is a gas drying and pulverizing machine, 5 is a cyclone collector, 6 is a bag dust collector, 7 is a storage bin, 8 is a scraper conveyor, 9 is a bucket elevator, 10 is a screw conveyor, 41 is a wet sludge particle inlet, 42 is a hot air inlet 43 is a material gas outlet, 44 is a feeding nipple cylinder, 45 is a middle nipple cylinder, 46 is a discharging nipple cylinder, 47 is a lining plate assembly, 48 is a feeding pipe, 49 is an air inlet pipe, 410 is a discharging pipe, 411 is a main shaft, 412 is a shaft sleeve, 413 is a big blade, 414 is a small blade, 415 is a discharging blade, 416 is a key, 417 is a wear-resisting spacer ring, 51 is a material gas inlet, 52 is a first sludge dry powder outlet, 53 is a dust gas outlet, 61 is a dust gas inlet, 62 is a second sludge dry powder outlet, and 63 is an exhaust gas outlet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The kiln cooperation harmless treatment system for the platy domestic sludge comprises a crushing system, a first conveying system, a gas drying and pulverizing machine 4, a gas-solid separation system, a storage bin 7, a second conveying system and a rotary kiln;
the crushing system comprises a feeding device and a crusher 1, wherein the downstream of the feeding device is communicated with the crusher 1, and a discharge hole of the crusher 1 is communicated with the first conveying system;
the upstream of the first conveying system is communicated with a discharge port of the crusher 1, and the downstream of the first conveying system is communicated with the gas drying and pulverizing machine 4;
The gas drying and pulverizing machine 4 comprises a wet sludge particle inlet 41, a hot air inlet 42 and a material gas outlet 43; the wet sludge particle inlet 41 is communicated with the downstream of the screw conveyor 3, the hot air inlet 42 is used for introducing hot air, and the material gas outlet 43 is communicated with the gas-solid separation system;
The gas-solid separation system comprises a cyclone collector 5 and a bag dust collector 6; the cyclone collector 5 comprises a material gas inlet 51, a first sludge dry powder outlet 52 and a dust-containing gas outlet 53, wherein the material gas inlet 51 is communicated with the material gas outlet 43, the first sludge dry powder outlet 52 is communicated with the storage bin 7, and the dust-containing gas outlet 53 is communicated with the bag dust collector 6; the bag dust collector 6 comprises a dust-containing gas inlet 61, a second sludge dry powder outlet 62 and an exhaust gas outlet 63, wherein the dust-containing gas inlet 61 is communicated with the dust-containing gas outlet 53, the second sludge dry powder outlet 62 is communicated with the storage bin 7, and the exhaust gas outlet 63 is communicated with the rotary kiln;
The storage bin 7 comprises a sludge dry powder inlet and a sludge dry powder outlet, wherein the sludge dry powder inlet is communicated with the first sludge dry powder outlet 52 and the second sludge dry powder outlet 62, and the sludge dry powder outlet is communicated with the second conveying system;
The upstream of the second conveying system is communicated with the sludge dry powder outlet, and the downstream of the second conveying system is communicated with the rotary kiln.
The cyclone collector 5 consists of an outer cylinder with a conical bottom, an air inlet pipe, an exhaust pipe, a storage tank and an ash discharge valve. The tail gas of the sludge powder and the hot air are mixed and enter the outer cylinder tangentially along the outer cylinder at a higher speed by the air inlet of the cyclone collector 5 to form rotary motion, the air flow is forced to do spiral linear rotary motion from top to bottom due to the limitation of the inner cylinder, the outer cylinder and the top cover, great centrifugal force is generated in the rotary motion process, the inertia force of the sludge powder is much greater than that of the air, the sludge powder is thrown and gradually separated, a particle concentration area is formed at the lower part of the outer cylinder wall, and the sludge powder enters the ash storage box through the ash discharge port. Finally enters a sludge dry powder storage bin 7 through a chute. The rotating airflow enters the exhaust pipe range attachment, is forced to start to rise rotationally due to the lower sealing condition, and finally exits the cyclone collector 5 through the exhaust pipe into the bag collector 6.
The bag dust collector 6 body consists of an upper box body, a middle box body, a filter bag, an ash bucket, an ash cleaning system, an ash discharging mechanism and the like. When the dust-containing gas discharged from the cyclone collector 5 enters the dust hopper through the air inlet pipeline at the lower part of the bag dust collector 6 and enters the dust hopper through the guide plate, coarse dust in the dust-containing gas falls into the dust hopper due to the collision of the guide plate, the reduction of the gas speed and the like and is conveyed to the sludge dry powder storage bin 7 through the chute. The rest fine dust enters a filter bag chamber along with the gas, is filtered by the filter bag and is blocked in the filter bag, and the purified waste gas is discharged out of the cloth bag dust collector 6 and enters a rotary kiln decomposing furnace through a pipeline to be burnt. The deposited dust on the filter bag is removed by adopting a method of blowing pulse air flow, and the removed sludge dust falls into a dust hopper and is conveyed into a sludge dry powder storage bin 7 through a chute. The process is a second gas-solid separation.
In order to further optimize the technical scheme, the loading device is a grab bucket, and the crusher 1 is a fine crushing crusher 1.
In order to further optimize the technical scheme, the first conveying system comprises a belt conveyor 2 and a screw conveyor 3, wherein the upstream of the belt conveyor 2 is communicated with the outlet of the crusher 1, the downstream of the belt conveyor 2 is communicated with the feeding port of the screw conveyor 3, and the downstream of the screw conveyor 3 is communicated with the gas drying and pulverizing machine 4.
In order to further optimize the technical scheme, the second conveying system comprises a scraper conveyor 8, a bucket elevator 9 and a screw conveyor 10, wherein the upstream of the scraper conveyor 8 is communicated with a sludge dry powder outlet, the downstream of the scraper conveyor 8 is communicated with the bucket elevator 9, the downstream of the bucket elevator 9 is communicated with the screw conveyor 10, and the downstream of the screw conveyor 10 is communicated with a rotary kiln.
For further optimization of the technical scheme, the cloth bag dust collector 6 is an anti-sticking cloth bag dust collector 6.
In order to further optimize the technical scheme, the device further comprises a negative pressure deodorization system, wherein the negative pressure deodorization system is matched with the crushing system, the first conveying system, the gas drying and pulverizing machine 4, the gas-solid separation system, the storage bin 7, the second conveying system and the rotary kiln.
The negative pressure deodorization system comprises an active carbon adsorption tower, a fan, an exhaust chimney, an indoor collection air pipe and an outdoor air pipe, and the active carbon adsorption tower, the fan, the exhaust chimney, the indoor collection air pipe and the outdoor air pipe are mutually matched to realize the deodorization effect.
As shown in fig. 2-3, for further optimization, the gas drying and pulverizing machine 4 comprises a wet sludge particle inlet 41, a hot air inlet 42, a material gas outlet 43, a feeding nipple cylinder 44, an intermediate nipple cylinder 45, a discharging nipple cylinder 46, a lining plate assembly 47, a feeding pipe 48, an air inlet pipe 49, a discharging pipe 410, a main shaft 411, a shaft sleeve 412, a large blade 413, a small blade 414, a discharging blade 415, a shaft sleeve 416 and a wear-resistant partition ring 417;
The feeding nipple cylinder 44, the middle nipple cylinder 45 and the discharging nipple cylinder 46 are sequentially connected through flanges, the flanges are matched with the sealing gasket for installation, sealing glue is smeared on the flanges and the sealing gasket, and a lining plate assembly 47 is arranged inside the feeding nipple cylinder 44 and the middle nipple cylinder 45;
A feed pipe 48 and an air inlet pipe 49 are welded on the feed nipple cylinder 44, the feed pipe 48 is communicated with the wet sludge particle inlet 41, and the air inlet pipe 49 is communicated with the hot air inlet 42;
The discharging pipe 48 is welded on the side wall of the discharging nipple cylinder 46 and is perpendicular to the central axis of the discharging nipple cylinder 46, and the discharging pipe 410 is communicated with the material gas outlet 43;
The main shaft 411 penetrates through the central axes of the feeding nipple cylinder 44, the middle nipple cylinder 45 and the discharging nipple cylinder 46, and the main shaft 411, the feeding nipple cylinder 44 and the discharging nipple cylinder 46 are respectively connected with a sealing device;
a pair of angle contact ball bearing devices are assembled at two ends of the main shaft 411, the main shaft 411 is in power connection with a secondary motor through the bearing devices, a shaft sleeve 412 is sleeved on the main shaft 411, a large blade 413, a small blade 414 and a discharge blade 415 are mounted on the shaft sleeve 412 in a matched manner, the large blade 413 and the small blade 414 are arranged at intervals, and the discharge blade 415 and the discharge pipe are located on the same plane;
The wear resistant spacer ring 417 is mounted on the liner plate assembly 47 and is mounted concentric with the vanelets 414.
The large blades 413 and the blade assembly 47 form a wind and material channel, the small blades 414 and the wear-resistant partition ring 417 form a wind and material channel, the main shaft is driven by the secondary motor to rotate at a high speed, and the dried sludge powder is carried out by the discharge blades 415 rotating at the high speed and the wind.
Example 2
The kiln cooperation harmless treatment process of the platy domestic sludge adopts the kiln cooperation harmless treatment system of the platy domestic sludge in the embodiment 1, and specifically comprises the following steps of:
(1) Firstly, crushing plate-shaped sludge by adopting a fine crusher until the particle size is smaller than 20mm to obtain sludge particles;
(2) Conveying the crushed sludge particles to a gas drying and pulverizing machine, setting the rotating speed of a main shaft blade to be 1500r/min-3000r/min, and introducing hot air at 55-70 ℃ for drying and further pulverizing to obtain mixed gas with the particle size of 50-300 mu m and the water content of less than 25%;
(3) Introducing the mixture gas into a gas-solid separation system for gas-solid separation to obtain waste gas and sludge dry powder respectively;
(4) The dry sludge powder is conveyed to a rotary kiln for burning after passing through a storage bin, and the waste gas is directly conveyed into the rotary kiln for thermal decomposition, wherein the decomposition temperature is higher than 850 ℃.
In order to further optimize the technical scheme, the particles in the step (1) are crushed to be 3-15 mm in particle size.
Example 3
The kiln cooperation harmless treatment process of the platy domestic sludge adopts the kiln cooperation harmless treatment system of the platy domestic sludge in the embodiment 1, and specifically comprises the following steps of:
(1) Firstly, crushing plate-shaped sludge by adopting a fine crusher until the particle size is smaller than 3mm to obtain sludge particles;
(2) Conveying the crushed sludge particles to a gas drying and pulverizing machine, setting the rotating speed of a main shaft to be 3000r/min, and introducing hot air at 70 ℃ for drying and further pulverizing to obtain mixed gas with the particle size of 50-95 mu m and the water content of less than 25%;
(3) Introducing the mixture gas into a gas-solid separation system for gas-solid separation to obtain waste gas and sludge dry powder respectively;
(4) The dry sludge powder is conveyed to a rotary kiln for burning after passing through a storage bin, and the waste gas is directly conveyed into the rotary kiln for thermal decomposition, wherein the decomposition temperature is 900 ℃.
Example 4
The kiln cooperation harmless treatment process of the platy domestic sludge adopts the kiln cooperation harmless treatment system of the platy domestic sludge in the embodiment 1, and specifically comprises the following steps of:
(1) Firstly, crushing plate-shaped sludge by adopting a fine crusher until the particle size is smaller than 10mm to obtain sludge particles;
(2) Conveying the crushed sludge particles to a gas drying and pulverizing machine, setting the rotating speed of a main shaft to be 2000r/min, and introducing hot air at 60 ℃ for drying and further pulverizing to obtain mixed gas with the particle size of 100-160 mu m and the water content of less than 25%;
(3) Introducing the mixture gas into a gas-solid separation system for gas-solid separation to obtain waste gas and sludge dry powder respectively;
(4) The dry sludge powder is conveyed to a rotary kiln for burning after passing through a storage bin, and the waste gas is directly conveyed into the rotary kiln for thermal decomposition, wherein the decomposition temperature is 1000 ℃.
Example 5
The kiln cooperation harmless treatment process of the platy domestic sludge adopts the kiln cooperation harmless treatment system of the platy domestic sludge in the embodiment 1, and specifically comprises the following steps of:
(1) Firstly, crushing plate-shaped sludge by adopting a fine crusher until the particle size is smaller than 15mm to obtain sludge particles;
(2) Conveying the crushed sludge particles to a gas drying and pulverizing machine, setting the rotating speed of a main shaft to be 1500r/min, and introducing hot air at 55 ℃ for drying and further pulverizing to obtain mixed gas with the particle size of 200-280 mu m and the water content of less than 25%;
(3) Introducing the mixture gas into a gas-solid separation system for gas-solid separation to obtain waste gas and sludge dry powder respectively;
(4) The dry sludge powder is conveyed to a rotary kiln for burning after passing through a storage bin, and the waste gas is directly conveyed into the rotary kiln for thermal decomposition at the decomposition temperature of 950 ℃.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The kiln cooperation harmless treatment process of the platy domestic sludge is characterized by comprising the following steps of:
(1) Firstly, crushing the plate-shaped sludge by adopting a fine crusher to obtain sludge particles;
(2) Conveying the crushed sludge particles to a gas drying and pulverizing machine, and introducing hot air to carry out drying and further pulverization treatment to obtain a mixture gas consisting of sludge powder and gas;
(3) Introducing the mixture gas into a gas-solid separation system for gas-solid separation to obtain waste gas and sludge dry powder respectively;
(4) And conveying the dry sludge powder to a rotary kiln for burning after passing through a storage bin, and directly introducing waste gas into the rotary kiln for thermal decomposition.
The kiln collaborative harmless treatment system adopting the platy domestic sludge comprises a crushing system, a first conveying system, a gas drying and pulverizing machine, a gas-solid separation system, a storage bin, a second conveying system and a rotary kiln;
the crushing system comprises a feeding device and a crusher, wherein the downstream of the feeding device is communicated with the crusher, and a discharge hole of the crusher is communicated with the first conveying system;
The first conveying system is communicated with the crusher discharge port at the upstream and communicated with the gas drying and pulverizing machine at the downstream;
the gas drying and pulverizing machine comprises a wet sludge particle inlet, a hot air inlet and a material gas outlet; the wet sludge particle inlet is communicated with the downstream of the screw conveyor, the hot air inlet is used for introducing hot air, and the material gas outlet is communicated with the gas-solid separation system;
The gas-solid separation system comprises a cyclone collector and a cloth bag dust collector; the cyclone collector comprises a material gas inlet, a first sludge dry powder outlet and a dust-containing gas outlet, wherein the material gas inlet is communicated with the material gas outlet, the first sludge dry powder outlet is communicated with the storage bin, and the dust-containing gas outlet is communicated with the bag dust collector; the cloth bag dust collector comprises a dust-containing gas inlet, a second sludge dry powder outlet and an exhaust gas outlet, wherein the dust-containing gas inlet is communicated with the dust-containing gas outlet, the second sludge dry powder outlet is communicated with the storage bin, and the exhaust gas outlet is communicated with the rotary kiln;
the storage bin comprises a sludge dry powder inlet and a sludge dry powder outlet, the sludge dry powder inlet is communicated with the first sludge dry powder outlet and the second sludge dry powder outlet, and the sludge dry powder outlet is communicated with the second conveying system;
the second conveying system is communicated with the sludge dry powder outlet at the upstream and communicated with the rotary kiln at the downstream;
the gas drying and pulverizing machine comprises a wet sludge particle inlet, a hot air inlet, a material gas outlet, a feeding nipple barrel, a middle nipple barrel, a discharging nipple barrel, a lining plate assembly, a feeding pipe, an air inlet pipe, a discharging pipe, a main shaft, a shaft sleeve, large blades, small blades, discharging blades, a shaft sleeve and a wear-resistant partition ring;
The feeding nipple cylinder body, the middle nipple cylinder body and the discharging nipple cylinder body are sequentially connected through flanges, the flanges are installed in a matched mode with the sealing gasket, sealing glue is smeared on the flanges and the sealing gasket, and lining plate assemblies are arranged inside the feeding nipple cylinder body and the middle nipple cylinder body;
The feeding pipe and the air inlet pipe are welded on the feeding short joint cylinder, the feeding pipe is communicated with the wet sludge particle inlet, and the air inlet pipe is communicated with the hot air inlet;
The discharging pipe is welded on the side wall of the discharging short section cylinder body and is perpendicular to the central axis of the discharging short section cylinder body, and the discharging pipe is communicated with the material gas outlet;
The main shaft penetrates through the central axes of the feeding nipple barrel, the middle nipple barrel and the discharging nipple barrel, and the main shaft, the feeding nipple barrel and the discharging nipple barrel are respectively connected with the sealing device;
A pair of angle contact ball bearing devices are assembled at two ends of the main shaft, the main shaft is in power connection with the secondary motor through the bearing devices, the shaft sleeve is sleeved on the main shaft, the key is mounted on the shaft sleeve in a matched mode, the big blade, the small blade and the discharging blade are mounted on the key, the big blade and the small blade are sequentially and alternately arranged, and the discharging blade and the discharging pipe are located on the same plane;
the wear-resistant spacer ring is arranged on the lining plate assembly and is concentrically arranged with the small blades;
A wind and material channel is formed between the big blade and the blade assembly, a wind and material channel is formed between the small blade and the wear-resistant partition ring, the main shaft is driven by the secondary motor to rotate at a high speed, and the dried sludge powder is carried out by the discharge blade rotating at the high speed and the wind;
The rotating speed of the combined type pulverizing blade in the gas drying and pulverizing machine in the step (2) is 1500r/min-3000r/min, and the temperature of the hot air is 55-70 ℃; the grain diameter of the sludge powder obtained in the step (2) is 50-300 mu m, and the water content of the sludge powder is less than 25%.
2. The kiln co-innocent treatment process for platy domestic sludge according to claim 1, wherein the first conveying system comprises a belt conveyor and a screw conveyor, wherein the upstream of the belt conveyor is communicated with the outlet of the crusher, the downstream of the belt conveyor is communicated with the feed inlet of the screw conveyor, and the downstream of the screw conveyor is communicated with the gas drying and pulverizing machine.
3. The kiln co-innocent treatment process for platy domestic sludge according to claim 1, wherein the second conveying system comprises a scraper conveyor, a bucket elevator and a screw conveyor, wherein the scraper conveyor is communicated with the sludge dry powder outlet at the upstream, the bucket elevator is communicated with the scraper conveyor at the downstream, the screw conveyor is communicated with the bucket elevator at the downstream, and the screw conveyor is communicated with the rotary kiln at the downstream.
4. A kiln co-innocent treatment process for platy domestic sludge according to any one of claims 1 to 3, and further comprising a negative pressure deodorization system, wherein the negative pressure deodorization system is installed in cooperation with the crushing system, the first conveying system, the gas drying and pulverizing machine, the gas-solid separation system, the storage bin, the second conveying system and the rotary kiln.
5. The kiln co-harmless treatment process of platy domestic sludge according to claim 1, wherein the step (1) is performed with crushing until the particle size is smaller than 20mm.
6. The kiln co-innocent treatment process for platy domestic sludge according to claim 5, wherein the step (1) is performed by crushing until the particle size is 3-15 mm.
7. The kiln co-harmless treatment process of platy domestic sludge according to claim 1, wherein in the step (3), the mixture gas is firstly introduced into a cyclone collector for gas-solid separation to obtain sludge dry powder and dust-containing gas respectively, and the dust-containing gas is continuously introduced into a bag dust collector for gas-solid separation to obtain waste gas and sludge dry powder respectively.
8. The kiln co-innocent treatment process for platy domestic sludge according to claim 1, wherein the decomposition temperature in the step (4) is higher than 850 ℃.
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