CN111121049A - System and method for cooperatively treating sludge in cement plant - Google Patents
System and method for cooperatively treating sludge in cement plant Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims abstract description 122
- 239000004568 cement Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 62
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 18
- 239000007921 spray Substances 0.000 claims abstract description 15
- 238000007599 discharging Methods 0.000 claims abstract 4
- 238000003756 stirring Methods 0.000 claims description 36
- 239000010813 municipal solid waste Substances 0.000 claims description 18
- 238000003825 pressing Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000011278 co-treatment Methods 0.000 claims description 6
- 238000005056 compaction Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract 2
- 239000000126 substance Substances 0.000 description 20
- 238000004537 pulping Methods 0.000 description 11
- 238000001354 calcination Methods 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 6
- 238000003837 high-temperature calcination Methods 0.000 description 6
- 239000002912 waste gas Substances 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 4
- 239000013067 intermediate product Substances 0.000 description 4
- 239000002910 solid waste Substances 0.000 description 4
- 239000002341 toxic gas Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000009924 canning Methods 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000003895 groundwater pollution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 244000052769 pathogen Species 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/50—Control or safety arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/80—Shredding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a cooperative sludge treatment system for a cement plant and a method for treating sludge, wherein the sludge treatment system comprises a homogenizing silo, a prepressing screw feeder, a double-cylinder cone valve type plunger pump, a furnace-entering spray gun, a hydraulic oil pump, a pushing cylinder piston and a hydraulic station, wherein the top of the homogenizing silo is provided with a hydraulic opening door, the bottom of the homogenizing silo is provided with a hydraulic sliding frame and a discharge pipe for conveying materials in the homogenizing silo to a feeding port of the prepressing screw feeder, a discharging port of the prepressing screw feeder is communicated with a double-cylinder cone valve type plunger pump feeding port, the discharging port of the double-cylinder cone valve type plunger pump is connected with a pipeline connected with the furnace-entering spray gun, the hydraulic oil pump is connected with one end of the pushing cylinder piston through a hydraulic link rod, the other end of the pushing cylinder piston is connected with the double-cylinder cone valve type plunger pump, the hydraulic station is controlled to, the slurry is directly discharged into the below-ground slurry homogenizing chamber by opening the door through hydraulic pressure.
Description
Technical Field
The invention relates to the field of sludge treatment systems, in particular to a sludge co-treatment system and a sludge co-treatment method for a cement plant.
Background
The sludge treatment aims at realizing reduction, harmlessness and recycling of sludge and avoiding pollution caused by improper treatment, the existing sludge treatment is low in stabilization and harmlessness degree, no effective technical route and equipment exist, a lot of sludge is simply concentrated and dehydrated, the sludge treatment is mainly direct landfill, groundwater pollution or heavy metal pollution is caused, and human health is directly influenced; sludge incinerators are built in part of areas, so that fly ash generated by incineration still needs to be transported and treated, and pollutants generated by sludge incineration can be discharged into the atmosphere to cause secondary pollution; the sludge is treated by the cooperation of the cement kiln, so that the damage to the environment and resources can be reduced, the pollution to the natural environment is reduced, and the secondary pollution to the environment caused by treatment modes such as landfill and incineration and the like is avoided; cement kilns are the best existing way to dispose of sludge, which is beneficial for resource reuse and sustainable economic development.
Chinese utility model patent 201720175083.7 a municipal administration sludge treatment system, utility model patent 201220091092.5 storage and stirring integral type sludge treatment pond, invention patent 201110383531.X sludge conditioning dehydration handles system and method, discloses a device, system and method for sludge treatment, but its technical scheme is too loaded down with trivial details, is not convenient for use.
Disclosure of Invention
The invention provides a cooperative sludge treatment system for a cement plant, which is designed according to a combustible substance combustion theory, a waste incineration harmless treatment theory and an acid gas and alkaline substance chemical reaction theory, depends on the existing cement production facilities, utilizes kiln tail waste heat flue gas, directly uses residual substances after sludge incineration as raw material components, and uses the residual substances after high-temperature calcination as clinker components to realize effective utilization of sludge, the method has no adverse effect on the quality index of the cement clinker, can (1) have stronger adaptability of the kiln tail (decomposing furnace) to the sludge, has high capacity of the kiln tail (decomposing furnace), and does not influence the quality parameters of the cement clinker and the normal operation of the kiln tail (decomposing furnace) due to the incineration of the sludge;
(2) the flow field in the kiln tail (decomposing furnace) is favorable for dispersing sludge, ensures that high-temperature flue gas is fully contacted with the sludge, is favorable for complete combustion of garbage, avoids generating toxic gas, and effectively inhibits the discharge of acidic substances as an intermediate product CaO of cement calcination is uniformly distributed in the kiln tail (decomposing furnace) in a suspended state;
(3) the residual substances after the sludge incineration are directly used as raw material components and then are used as clinker components after high-temperature calcination, so that solid wastes which need secondary treatment are not generated;
(4) compared with a newly-built special incineration plant, the sludge co-processed by the cement plant only needs to be added with a garbage pretreatment system, and a cement production system is properly modified, so that the total emission amount of atmospheric pollutants is reduced, the investment is low, the cost is low, and the defects caused by the prior art are overcome.
The invention also provides a method for treating sludge by adopting the system for cooperatively treating sludge in the cement plant.
In order to solve the technical problems, the invention provides the following technical scheme:
the first aspect is that the system for cooperatively treating sludge in the cement plant comprises a homogenizing silo, a prepressing screw feeder, a double-cylinder cone valve type plunger pump, a furnace entering spray gun, a hydraulic oil pump, a pushing cylinder piston and a hydraulic station, wherein a hydraulic opening door is installed at the top of the homogenizing silo, a hydraulic sliding frame and a discharge pipe for conveying materials in the homogenizing silo to a feeding port of the prepressing screw feeder are installed at the bottom of the homogenizing silo, a discharge port of the prepressing screw feeder is communicated with a feeding port of the double-cylinder cone valve type plunger pump, the feeding port of the double-cylinder cone valve type plunger pump is connected with a pipeline connected with the furnace entering spray gun, the hydraulic oil pump is connected with one end of the pushing cylinder piston through a hydraulic link rod, the other end of the pushing cylinder piston is connected with the double-cylinder cone valve type plunger pump, and the hydraulic station is in control connection with the, The hydraulic carriage.
The hydraulic sliding frame can play a role in arch breaking and feeding, so that the materials are prevented from bridging, and the materials smoothly enter the pre-pressing screw feeder below the homogenizing chamber.
The above-mentioned cement plant coprocessing mud system, wherein, the internally mounted of homogenate storehouse has the material level detector.
The above-mentioned cement plant coprocessing sludge system, wherein, the internally mounted of homogenate storehouse has 2 at least (mixing) shafts, can carry out the homogeneous mixing stirring with multiple material.
The above cooperative sludge treatment system for cement plants is characterized in that the number of the stirring shafts is three.
The above cooperative sludge treatment system for the cement plant, wherein a stirring knife is installed inside the homogenizing silo.
The above-mentioned cement plant coprocessing sludge system, wherein, the maintenance valve is installed to the top of pre-compaction screw feeder feed inlet.
The system for cooperatively treating the sludge in the cement plant is characterized in that the pre-pressing screw feeder is a double-helix pre-pressing screw feeder, the sludge can be extruded and pressed into the hopper chamber of the double-cylinder cone valve type plunger pump in a positive pressure mode, the double-cylinder cone valve type plunger pump is of a cone valve structure, a material cylinder piston can be pushed through a hydraulic link rod under the action of the Lishi swash plate variable hydraulic oil pump, the material is pushed into a pipeline, the sludge in the pipeline moves forward at the speed of 0.1-0.3 m/s, and the sludge is finally scattered through a furnace-entering spray gun and sprayed into a kiln tail (a decomposing furnace) for incineration.
The above-mentioned cement plant coprocessing sludge system, wherein, the maintenance valve is the slide valve.
In a second aspect, a method for treating sludge by using a cement plant co-treatment sludge system comprises the following steps:
step 1: the method comprises the following steps that transported sludge and garbage are discharged into a homogenizing cabin below the ground through a hydraulic opening door, the pulping cabin has the comprehensive function of sludge crushing, pulping and stirring, the homogenizing cabin is functionally divided into two areas, namely a crushing and pulping area and a stirring area, the stirring area is arranged at one end of a discharge port of the homogenizing cabin, the crushing and pulping area is arranged at the other end of the homogenizing cabin, the crushing and pulping area and the stirring area are not in strict limits, and a control terminal is respectively in control connection with a hydraulic station, a hydraulic oil pump, a stirring shaft and a stirring knife;
step 2: the sludge and the garbage are stirred and crushed by a stirring shaft and/or a stirring knife in the homogenizing silo, so that the sludge and the garbage in the homogenizing silo are further mixed and discharged smoothly;
and step 3: the movable hydraulic sliding frame is controlled to prevent the sludge from arching, and the whole working site is sealed by a sealed color steel structure room;
and 4, step 4: after stirring is finished, controlling the hydraulic sliding frame to convey the materials in the homogenizing silo to the prepressing screw feeder;
and 5: the material in the pre-pressing spiral feeder is input into a double-cylinder cone valve type plunger pump, a hydraulic oil pump is controlled to drive and push a material cylinder piston to convey the material in the double-cylinder cone valve type plunger pump to a furnace entering spray gun to be sprayed into the kiln tail for high-temperature incineration, and an impurity remover is arranged on a pipeline in order to reduce the influence of the material on a sludge treatment system.
The method for treating the sludge by adopting the sludge co-treatment system of the cement plant comprises the following steps in the step 1: the material level detector automatically detects the material capacity in the homogenizing silo in real time and transmits the material capacity to the control terminal, and an alarm is given when the control terminal realizes the empty material capacity and the full material capacity. The material capacity can be reflected through the material level signal, and the material level detector transmits the material level signal to the control terminal, and the control terminal gives an alarm when realizing empty material level and full material level. The control terminal can be a computer, a mobile phone and other terminal equipment.
According to the characteristics of sludge, the materials suitable for the sludge treatment system mainly comprise the following types: the system carries out compatibility experiments on substances with different properties, adjusts the substances to a certain heat value, water content and viscosity according to a certain proportion, uniformly stirs the substances in a homogenizing silo, and continuously sends the substances to a kiln tail for incineration through a high-pressure pipeline by adopting a hydraulic oil pump.
Whole processing mud system adopts the totally enclosed form, the mud transportation adopts special closed canning transportation, income stove mud adopts pipeline seal transport to kiln tail (dore furnace), organic matter in the mud, pathogenic organism decomposes at the high temperature calcination process, a small amount of system waste gas that the storehouse produced is stored to mud is carried to the suitable position of kiln tail by the fan and is retrieved, the processing place of project has carried out the shagginess and has handled, all operations of project after the operation are gone on in the factory building, the influence to the environment has been reduced, the harmful waste gas that can produce in the project operation simultaneously, install exhaust system additional, discharge the waste gas that will produce and discharge kiln tail (dore furnace) lower part of high temperature and handle, the system does not have outer foul smell of arranging, system tail gas discharges up to standard after removing dust.
According to the technical scheme provided by the system and the method for cooperatively treating the sludge in the cement plant, the invention has the following technical effects:
(1) the kiln tail (decomposing furnace) has stronger adaptability to the sludge, the kiln tail (decomposing furnace) has high capacity, the incineration of the sludge does not influence various quality parameters of cement clinker, and the normal operation of the kiln tail (decomposing furnace) is not influenced;
(2) the flow field in the kiln tail (decomposing furnace) is favorable for dispersing sludge, ensures that high-temperature flue gas is fully contacted with the sludge, is favorable for complete combustion of garbage, avoids generating toxic gas, and effectively inhibits the discharge of acidic substances as an intermediate product CaO of cement calcination is uniformly distributed in the kiln tail (decomposing furnace) in a suspended state;
(3) the residual substances after the sludge incineration are directly used as raw material components and then are used as clinker components after high-temperature calcination, so that solid wastes which need secondary treatment are not generated;
(4) compared with a newly-built special incineration plant, the sludge co-processed by the cement plant only needs to be added with a garbage pretreatment system and a cement production system is properly modified, so that the total emission amount of atmospheric pollutants is reduced, the investment is low, and the cost is low.
This application and chinese utility model patent 201720175083.7 a municipal sludge treatment system's main difference is as follows:
1: the homogenizing silo is divided into a crushing pulping area and a stirring area, a stirring knife is arranged in the homogenizing silo to stir and crush the sludge and the garbage, and various materials are uniformly mixed and stirred, so that the blanking is smooth;
2. a material level detector is arranged in the homogenizing silo to automatically detect the material capacity in the homogenizing silo in real time;
3. a gate valve convenient for strip maintenance is arranged;
4. scattering and spraying the materials into a decomposing furnace for incineration by using a furnace-entering spray gun;
5. the whole sludge treatment system adopts a fully-sealed form;
6. a prepressing screw feeder is adopted for feeding, so that the problem of accumulation of a material conveying channel is solved;
the main difference of this application and utility model patent 201220091092.5 storage and stirring integral type sludge treatment pond is as follows:
1. the sludge and garbage crushing is completed in the homogenizing silo, so that the sludge has better fluidity, the investment of auxiliary equipment is less, and the maintenance is convenient;
2. the plunger pump is arranged at a low position, so that sludge conveying is facilitated; and a gate valve is arranged between the conveyor and the plunger pump, so that the belt material is convenient to overhaul.
The main differences between the treatment system and the treatment method for conditioning and dehydrating the X sludge in the application and the invention patent 201110383531 are as follows:
1. the wet sludge is directly fed into the decomposing furnace for calcination, the treatment method is simple, sludge conveying is facilitated on one hand, and secondary treatment of wastewater separated from the plate-and-frame dehydrator is avoided on the other hand;
2. the whole system of handling sludge of this application adopts the totally enclosed form, and the processing place of project has carried out the canopy and has handled, and all operations of project after the operation are all gone on in the factory building, have reduced the influence to the environment.
Drawings
FIG. 1 is a schematic structural diagram of a system for co-processing sludge in a cement plant.
Wherein the reference numbers are as follows:
the device comprises a pulp homogenizing bin 101, a prepressing screw feeder 102, a double-cylinder cone valve type plunger pump 103, a furnace entering spray gun 104, a hydraulic oil pump 105, a material cylinder pushing piston 106, a hydraulic station 107, a hydraulic opening door 108, a hydraulic sliding frame 109, a pipeline 110, a hydraulic link rod 111, a kiln tail 112 and an inspection valve 113.
Detailed Description
In order to make the technical means, the characteristics, the purposes and the functions of the invention easy to understand, the invention is further described with reference to the specific drawings.
The first embodiment of the invention provides a sludge cooperative treatment system and a sludge cooperative treatment method for a cement plant, aiming at facilitating sludge dispersion in a flow field in a kiln tail (decomposing furnace), ensuring full contact between high-temperature flue gas and sludge, facilitating complete combustion of garbage, avoiding generation of toxic gas, and effectively inhibiting discharge of acidic substances as an intermediate product CaO of cement calcination is uniformly distributed in the kiln tail (decomposing furnace) in a suspension state; the residual substances after the sludge incineration are directly used as raw material components and then are used as clinker components after high-temperature calcination, so that solid wastes which need secondary treatment are not generated; compared with a newly-built special incineration plant, the sludge co-processed by the cement plant only needs to be added with a garbage pretreatment system and a cement production system is properly modified, so that the total emission amount of atmospheric pollutants is reduced, the investment is low, and the cost is low.
As shown in FIG. 1, in a first aspect, a first embodiment is a sludge cooperative treatment system for a cement plant, which comprises a homogenate bin 101, a prepressing screw feeder 102, a two-cylinder cone valve type plunger pump 103, a furnace entering spray gun 104, a hydraulic oil pump 105, a pushing cylinder piston 106 and a hydraulic station 107, wherein a hydraulic opening door 108 is installed at the top of the homogenate bin 101, a hydraulic carriage 109 and a discharge pipe for conveying materials in the homogenate bin 101 to a feeding port of the prepressing screw feeder 102 are installed at the bottom of the homogenate bin 101, a discharge port of the prepressing screw feeder 102 is communicated with the feeding port of the two-cylinder cone valve type plunger pump 103, a discharge port of the two-cylinder cone valve type plunger pump 103 is connected with a pipeline 110 connected with the furnace entering spray gun 104, the hydraulic oil pump 105 is connected with one end of the pushing cylinder piston 106 through a hydraulic link rod 111, the other end of the pushing cylinder piston 106 is connected with the two-cylinder cone valve type plunger pump, The hydraulic sliding frame 109 directly discharges the external vehicle-carried sludge into the below-ground type homogenizing chamber 101 through the hydraulic opening door 108, and the whole sludge treatment system is arranged below the ground.
The hydraulic sliding frame 109 can play a role in arch breaking and feeding, and preventing materials from bridging, so that the materials can smoothly enter the pre-pressing screw feeder 102 below the homogenizing silo 101.
Wherein, a material level detector is arranged inside the homogenate bin 101.
Wherein, the inside of homogenate storehouse 101 is installed at least 2 (mixing) shafts, preferably three (mixing) shafts, can carry out the homogeneous mixing stirring with multiple material.
Wherein, the inside of the homogenate bin 101 is provided with a stirring knife.
Wherein, an overhaul valve 113 is arranged above the feeding hole of the prepressing screw feeder 102.
The prepressing screw feeder 102 is a double-helix prepressing screw feeder 102, sludge can be compacted and pressed into a hopper chamber of a double-cylinder cone valve type plunger pump 103 in a positive pressure mode, the double-cylinder cone valve type plunger pump 103 is of a cone valve structure, a material cylinder piston 106 can be pushed through a hydraulic link rod 111 under the action of a Lishi swash plate variable hydraulic oil pump 105, materials are pushed into a pipeline 110, the sludge in the pipeline 110 moves forward at the speed of 0.1-0.3 m/s, and the sludge is finally scattered and sprayed into a kiln tail 112 (decomposing furnace) through a furnace-entering spray gun 104 to be incinerated.
Wherein, the maintenance valve 113 is a gate valve.
Second aspect, second embodiment: a method for treating sludge by adopting a sludge co-treatment system of a cement plant comprises the following steps:
step 1: the method comprises the following steps that transported sludge and garbage are discharged into a homogenizing silo 101 below the ground through a hydraulic opening door 108, the pulping silo has the comprehensive function of sludge crushing, pulping and stirring, the homogenizing silo 101 is functionally divided into a crushing pulping area and a stirring area, the stirring area is arranged at one end of a discharge port of the homogenizing silo 101, the crushing pulping area is arranged at the other end of the homogenizing silo, the crushing pulping area and the stirring area are not in strict limits, a material level detector automatically detects the material capacity in the homogenizing silo 101 in real time and transmits the material capacity to a control terminal, the control terminal is respectively connected with a hydraulic station 107, a hydraulic oil pump 105, a stirring shaft and a stirring knife in a control mode, the material level detector transmits material level signals to the control terminal, and an alarm is given when the control terminal achieves an; the control terminal can be a computer, a mobile phone and other terminal equipment;
step 2: the sludge and the garbage are stirred and crushed by a stirring shaft and/or a stirring knife in the homogenizing silo 101, so that the sludge and the garbage in the homogenizing silo 101 are further mixed and discharged smoothly;
and step 3: the movable hydraulic sliding frame 109 is controlled to prevent the sludge from arching, and the whole working site is sealed by a sealed color steel structure room;
and 4, step 4: after stirring is finished, controlling a hydraulic sliding frame 109 to convey the material in the homogenizing silo 101 to the prepressing screw feeder 102;
and 5: the material in the pre-pressing screw feeder 102 is input into a double-cylinder cone valve type plunger pump 103, a hydraulic oil pump 105 is controlled to drive and push a material cylinder piston 106 to convey the material in the double-cylinder cone valve type plunger pump 103 to a furnace entering spray gun 104 to be sprayed into a kiln tail 112 for high-temperature burning, and an impurity remover is arranged on a pipeline 110 in order to reduce the influence of the material on a sludge treatment system.
According to the characteristics of sludge, the materials suitable for the sludge treatment system mainly comprise the following types: the system carries out compatibility experiments on substances with different properties, adjusts the substances to a certain heat value, water content and viscosity according to a certain proportion, uniformly stirs the substances in the homogenizing chamber 101, and continuously sends the substances to the kiln tail 112 for incineration through the high-pressure pipeline 110 by adopting the hydraulic oil pump 105.
The whole sludge treatment system adopts a fully-sealed form, the sludge is transported by adopting special sealed canning, the sludge entering the furnace is transported to the kiln tail 112 (decomposing furnace) by adopting a pipeline 110 in a sealed manner, organic matters in the sludge and pathogenic microorganisms are decomposed in the high-temperature calcining process, a small amount of system waste gas generated by a sludge storage bin is transported to a proper position of the kiln tail 112 by a fan to be recovered, the treatment place of a project is subjected to shed treatment, all operations of the operated project are carried out in a factory building, the influence on the environment is reduced, meanwhile, harmful waste gas which can be generated in the operation of the project is additionally provided with an exhaust system, the generated waste gas is discharged to the lower part of the kiln tail 112 (decomposing furnace) with high temperature to be treated, no odor is discharged outside, and the system tail gas is discharged.
In conclusion, the system and the method for cooperatively treating the sludge in the cement plant can (1) have stronger adaptability of the kiln tail (decomposing furnace) to the sludge, the productivity of the kiln tail (decomposing furnace) is high, and the incineration of the sludge does not influence various quality parameters of cement clinker nor the normal operation of the kiln tail (decomposing furnace);
(2) the flow field in the kiln tail (decomposing furnace) is favorable for dispersing sludge, ensures that high-temperature flue gas is fully contacted with the sludge, is favorable for complete combustion of garbage, avoids generating toxic gas, and effectively inhibits the discharge of acidic substances as an intermediate product CaO of cement calcination is uniformly distributed in the kiln tail (decomposing furnace) in a suspended state;
(3) the residual substances after the sludge incineration are directly used as raw material components and then are used as clinker components after high-temperature calcination, so that solid wastes which need secondary treatment are not generated;
(4) compared with a newly-built special incineration plant, the sludge co-processed by the cement plant only needs to be added with a garbage pretreatment system and a cement production system is properly modified, so that the total emission amount of atmospheric pollutants is reduced, the investment is low, and the cost is low. .
Specific embodiments of the invention have been described above. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; various changes or modifications may be made by one skilled in the art within the scope of the claims without departing from the spirit of the invention, and without affecting the spirit of the invention.
Claims (10)
1. The cooperative sludge treatment system for the cement plant is characterized by comprising a homogenizing silo, a prepressing screw feeder, a double-cylinder cone valve type plunger pump, a furnace entering spray gun, a hydraulic oil pump, a pushing cylinder piston and a hydraulic station, wherein a hydraulic opening door is installed at the top of the homogenizing silo, a hydraulic sliding frame and a discharging pipe for conveying materials in the homogenizing silo to a feeding port of the prepressing screw feeder are installed at the bottom of the homogenizing silo, a discharging port of the prepressing screw feeder is communicated with a feeding port of the double-cylinder cone valve type plunger pump, the feeding port of the double-cylinder cone valve type plunger pump is connected with a pipeline connected with the furnace entering spray gun, the hydraulic oil pump is connected with one end of the pushing cylinder piston through a hydraulic link rod, the other end of the pushing cylinder piston is connected with the double-cylinder cone valve type plunger pump, and the hydraulic station is in control connection with the hydraulic opening, The hydraulic carriage.
2. The system for sludge cooperative processing in a cement plant as claimed in claim 1, wherein a material level detector is installed inside the homogenizing silo.
3. The system for the cooperative treatment of sludge in cement plant as claimed in claim 2, wherein at least 2 stirring shafts are installed inside said homogenizing silo.
4. The system for sludge co-processing in cement plant as claimed in claim 3, wherein there are three stirring shafts.
5. The system for the cooperative treatment of sludge in the cement plant as claimed in claim 2, 3 or 4, wherein the stirring knife is installed inside the homogenizing silo.
6. The system for the cooperative treatment of sludge in the cement plant as claimed in claim 1, wherein a service valve is installed above the feeding port of the pre-pressing screw feeder.
7. The cement plant coprocessing sludge system of claim 6 wherein the pre-compaction screw feeder is a double helix pre-compaction screw feeder.
8. The system for the cooperative treatment of sludge in the cement plant according to claim 6 or 7, wherein the service valve is a gate valve.
9. A method for treating sludge by using the cement plant co-treatment sludge system according to any one of claims 1 to 8, comprising the steps of:
step 1: the transported sludge and garbage are discharged into a homogenizing chamber below the ground through a hydraulic opening door;
step 2: the sludge and the garbage are stirred and crushed by a stirring shaft and/or a stirring knife in the homogenizing silo;
and step 3: controlling the movable hydraulic sliding frame to prevent the sludge from arching;
and 4, step 4: after stirring is finished, controlling the hydraulic sliding frame to convey the materials in the homogenizing silo to the prepressing screw feeder;
and 5: and (3) inputting the materials in the pre-pressing spiral feeder into a double-cylinder cone valve type plunger pump, controlling a hydraulic oil pump to drive and push a material cylinder piston to convey the materials in the double-cylinder cone valve type plunger pump to a furnace-entering spray gun and spraying the materials into the kiln tail for high-temperature incineration.
10. The method for treating sludge by using the cement plant co-processing sludge system as claimed in claim 9, wherein the step 1 further comprises the following steps: the material level detector automatically detects the material capacity in the homogenizing silo in real time and transmits the material capacity to the control terminal, and the control terminal gives an alarm when the empty material capacity and the full material capacity are realized.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324251A (en) * | 2021-04-26 | 2021-08-31 | 河源市金杰环保建材有限公司 | Hazardous waste kiln co-treatment process |
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