CN111792814A - Fly ash municipal sludge treatment method and system - Google Patents
Fly ash municipal sludge treatment method and system Download PDFInfo
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- CN111792814A CN111792814A CN202010801106.7A CN202010801106A CN111792814A CN 111792814 A CN111792814 A CN 111792814A CN 202010801106 A CN202010801106 A CN 202010801106A CN 111792814 A CN111792814 A CN 111792814A
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- 239000010881 fly ash Substances 0.000 title claims abstract description 162
- 239000010802 sludge Substances 0.000 title claims abstract description 161
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000003337 fertilizer Substances 0.000 claims abstract description 33
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 239000010865 sewage Substances 0.000 claims abstract description 19
- 230000001954 sterilising effect Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000010883 coal ash Substances 0.000 claims description 11
- 239000002956 ash Substances 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 230000003750 conditioning effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 239000002361 compost Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 13
- 239000002245 particle Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 244000052769 pathogen Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000000149 chemical water pollutant Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/008—Sludge treatment by fixation or solidification
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a fly ash municipal sludge treatment method, which comprises the following steps: collecting fly ash generated by a coal-fired boiler; collecting and dehydrating municipal sludge generated by a sewage treatment plant; stirring and mixing the fly ash and the municipal sludge, further solidifying and sterilizing after releasing heat to form the mixed fertilizer. The fly ash and the municipal sludge are mixed and stirred, and the mixture is further solidified and sterilized after heat release to form a mixed fertilizer, so that the fly ash is effectively utilized to solve the problem of the municipal sludge, the harmless treatment is realized, and the treatment cost is reduced. The invention also discloses a system applying the method.
Description
Technical Field
The invention relates to the field of fly ash treatment, in particular to a fly ash municipal sludge treatment method. In addition, the invention also relates to a system applying the method.
Background
The fly ash is essentially solid particle waste which is generated in the coal-fired power plant in the process of burning coal for power generation and cannot be burned any more. It contains silicon oxide, aluminum oxide, iron oxide, calcium oxide and small amount of other oxides and alkaline substances. As the fly ash particles are fine and easy to fly away with the wind, the fly ash particles fall in nearby living areas, and great harm is caused to the living environment of people. The traditional method for treating fly ash is a wet-discharging method, wherein fly ash and water are mixed according to a certain proportion and are settled in a natural settling manner. However, the wet-discharging method is difficult to implement or has high implementation cost, large floor area, large land occupation and risk of environmental pollution caused by leakage.
Meanwhile, with the acceleration of the urbanization process, the yield of the domestic sewage is increased sharply. Sludge is the most common end product produced by municipal sewage treatment systems. Contains a large amount of bacteria and pathogens, and has great pollution to human bodies and urban environment. In addition, the sludge has high organic matter content, is easy to rot and smell, has small particles and small specific gravity, is formed into colloidal liquid, but the landfill leachate has great pollution risk to the underground water environment.
Therefore, how to provide a stable, efficient and safe fly ash municipal sludge treatment method and system is a technical problem to be solved by the technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a fly ash municipal sludge treatment method, which is characterized in that fly ash and municipal sludge are mixed and stirred, heat is released, and then the mixture is further solidified and sterilized to form a mixed fertilizer, so that the fly ash is effectively utilized to solve the problem of municipal sludge and realize harmless treatment. It is another object of the present invention to provide a system for applying the above method.
In order to solve the technical problem, the invention provides a fly ash municipal sludge treatment method, which comprises the following steps:
collecting fly ash generated by a coal-fired boiler;
collecting and dehydrating municipal sludge generated by a sewage treatment plant;
and stirring and mixing the fly ash and the municipal sludge, releasing heat, and further curing and sterilizing to form the mixed fertilizer.
Preferably, the collecting fly ash produced by the coal-fired boiler comprises the steps of:
cooling the fly ash produced by the coal-fired boiler;
conveying the fly ash to an ash storage yard;
and conveying the fly ash to a fly ash storage bin from the fly ash storage yard through a pneumatic conveyor.
Preferably, a dust collector is arranged above the fly ash storage bin and used for collecting the flying dust in the conveying process.
Preferably, the collecting and dewatering municipal sludge produced by a sewage treatment plant comprises the steps of:
chemically conditioning the municipal sludge produced by the sewage treatment plant and dehydrating the sludge by a vacuum filter press to form a sludge cake;
and conveying the mud cakes to a sludge storage bin through a transport dump truck.
Preferably, the stirring and mixing of the fly ash and the municipal sludge comprises the following steps:
conveying the fly ash to a main control room from the fly ash storage bin through an air conveying system;
conveying the fly ash to a main stirrer from the main control room through a main impeller;
transporting the mud cake from the sludge storage bin to a main sludge hopper by a loader;
conveying the municipal sludge from the main sludge charging hopper to the main mixer through a main screw pump;
conveying the fly ash and the municipal sludge to the main stirrer simultaneously for stirring and mixing to form the mixed fertilizer;
and conveying the mixed fertilizer to a mixed product storage bin.
Preferably, the conveying speed is controlled by the main impeller and the main screw pump, so that the mixing ratio of the fly ash and the municipal sludge is in a range of 1:2 to 4: 1.
preferably, the method comprises the following steps after the mixed fertilizer is formed:
transporting the compost to an open place for storage by a conveyor belt;
and moving the mixed fertilizer to a transport dump truck through a loader and transporting the mixed fertilizer to various places.
Preferably, the stirring and mixing the fly ash and the municipal sludge further comprises the steps of:
conveying the fly ash to a secondary regulation room from the fly ash storage bin through an air conveying system;
conveying the fly ash to a secondary stirrer from the secondary regulation and control room through a secondary impeller;
transporting the mud cake from the sludge storage bin to a secondary sludge hopper by a loader;
conveying the municipal sludge from the secondary sludge charging hopper to the secondary mixer by a secondary screw pump;
conveying the fly ash and the municipal sludge to the secondary stirrer simultaneously for stirring and mixing, and adding water to the secondary stirrer to form humidity-regulating fly ash;
and conveying the humidity-adjusting fly ash to a humidity-adjusting finished product storage bin.
The invention provides a fly ash municipal sludge treatment system, which comprises:
the coal ash storage bin is used for storing coal ash powder generated by the coal-fired boiler;
the main control room is connected with the fly ash storage bin through an air conveying system and used for temporarily storing the fly ash and stabilizing unstable fluctuating airflow in the pneumatic conveying process;
the sludge storage bin is used for storing municipal sludge generated by a sewage treatment plant;
the main sludge charging hopper is used for temporarily storing the municipal sludge;
the main stirrer is communicated with the main control room through a main impeller, communicated with the main sludge charging hopper through a main screw pump and used for mixing and stirring the fly ash and the municipal sludge;
and the mixed product storage bin is used for storing the formed mixed fertilizer.
Preferably, the method further comprises the following steps:
the secondary regulation room is connected with the fly ash storage bin through an air conveying system and is used for temporarily storing the fly ash and stabilizing unstable fluctuating airflow in the pneumatic conveying process;
the secondary sludge charging hopper is used for temporarily storing the municipal sludge;
the secondary stirrer is communicated with the secondary regulation and control room through a secondary impeller, communicated with the secondary sludge charging hopper through a secondary screw pump and used for mixing and stirring the fly ash and the municipal sludge;
the water tank is communicated with the secondary stirrer and is used for adding water into the secondary stirrer;
and the humidity-adjusting finished product storage bin is used for storing the formed humidity-adjusting fly ash.
The invention provides a fly ash municipal sludge treatment method, which comprises the following steps: collecting fly ash generated by a coal-fired boiler; collecting and dehydrating municipal sludge generated by a sewage treatment plant; stirring and mixing the fly ash and the municipal sludge, further solidifying and sterilizing after releasing heat to form the mixed fertilizer.
The invention also provides a system applying the method, which comprises the following steps: the coal ash storage bin is used for storing coal ash powder generated by the coal-fired boiler; the main control room is connected with the fly ash storage bin through an air conveying system and used for temporarily storing the fly ash and stabilizing unstable fluctuating airflow in the pneumatic conveying process; the sludge storage bin is used for storing municipal sludge generated by a sewage treatment plant; the main sludge charging hopper is used for temporarily storing the municipal sludge; the main stirrer is communicated with the main control room through a main impeller, communicated with the main sludge charging hopper through a main screw pump and used for mixing and stirring the fly ash and the municipal sludge; and the mixed product storage bin is used for storing the formed mixed fertilizer.
The fly ash and the municipal sludge are mixed and stirred, and the mixture is further solidified and sterilized after heat release to form a mixed fertilizer, so that the fly ash is effectively utilized to solve the problem of the municipal sludge, the harmless treatment is realized, and the treatment cost is reduced.
Drawings
FIG. 1 is a flow chart of a specific embodiment of the fly ash municipal sludge treatment method provided by the invention.
Detailed Description
The core of the invention is to provide a fly ash municipal sludge treatment method, which comprises the steps of mixing and stirring fly ash and municipal sludge, further solidifying and sterilizing after releasing heat to form a mixed fertilizer, effectively utilizing the fly ash to solve the problem of municipal sludge and realizing harmless treatment. Another core of the present invention is to provide a system applying the above method.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a flow chart of a fly ash municipal sludge treatment method according to an embodiment of the present invention.
The specific embodiment of the invention provides a fly ash municipal sludge treatment method, which comprises the following steps: collecting fly ash generated by a coal-fired boiler; collecting and dehydrating municipal sludge generated by a sewage treatment plant; stirring and mixing the fly ash and the municipal sludge, further solidifying and sterilizing after releasing heat to form the mixed fertilizer.
The fly ash and the municipal sludge are mixed and stirred, and the mixture is further solidified and sterilized after heat release to form a mixed fertilizer, so that the fly ash is effectively utilized to solve the problem of the municipal sludge, the harmless treatment is realized, and the treatment cost is reduced.
Specifically, collecting fly ash produced by a coal-fired boiler comprises the steps of: cooling the fly ash generated by the coal-fired boiler; conveying the fly ash to an ash storage yard; the fly ash is conveyed to a fly ash storage bin from an ash storage yard through a pneumatic conveyor.
The coal ash generated by the coal-fired boiler is cooled and then conveyed to an adjacent ash storage field, and the coal ash is conveyed to a coal ash storage bin from the ash storage field by a pneumatic conveyor in a pneumatic ash conveying mode. The dust collector is arranged above the fly ash storage bin, and is used for collecting flying dust in the pneumatic ash conveying process, so that the environment pollution caused by the overflow of the flying dust is avoided.
The method for collecting and dewatering municipal sludge generated by a sewage treatment plant comprises the following steps: carrying out chemical conditioning on municipal sludge generated by a sewage treatment plant and dehydrating the sludge by using a vacuum filter press to form a sludge cake; and the mud cakes are conveyed to a sludge storage bin through a transport dump truck.
The sewage treatment plant carries out chemical conditioning on the municipal sludge and dehydrates the municipal sludge through a vacuum filter press, and the dehydrated mud cake is transported to a sludge storage bin through a sludge transport dump truck.
The transportation means in the transportation process can be adjusted according to the situation, such as a conveyor belt and the like, and the method is within the protection scope of the invention.
The stirring and mixing of the fly ash and the municipal sludge comprises the following steps: conveying the fly ash to a main control room from a fly ash storage bin through an air conveying system; conveying the fly ash to a main stirrer from a main control room through a main impeller; the mud cake is conveyed to a main sludge charging hopper from a sludge storage bin through a loader; conveying the municipal sludge from a main sludge charging hopper to a main stirrer through a main screw pump; conveying the fly ash and the municipal sludge to a main stirrer simultaneously for stirring and mixing to form a mixed fertilizer; and conveying the mixed fertilizer to a mixed product storage bin.
The loader conveys sludge from the sludge storage bin to the main sludge charging hopper, the sludge is conveyed to the main stirrer through the main screw pump, the fly ash is conveyed from the fly ash storage bin to the main control room by the air conveying system, and the bottom of the main control room is provided with the main impeller. The main control room is mainly used for preventing the fly ash from generating unstable fluctuating airflow in the pneumatic conveying process, so that the fly ash can smoothly enter the main stirrer from the pipeline.
The fly ash and the municipal sludge are simultaneously conveyed to the main stirrer to be mixed, and because the fly ash contains a large amount of calcium oxide, the water content of the dewatered mud cake is about 80-90%, and the calcium oxide and water react after mixing to generate a large amount of heat, so that the mud cake is further solidified. Meanwhile, the heat generated by the exothermic reaction is huge, so that various bacteria and pathogens in the sludge can be effectively eliminated, and the nutritional ingredients of the sludge are well reserved.
Further, the conveying speed is controlled by a main impeller and a main screw pump, so that the mixing ratio of the fly ash and the municipal sludge is 1: 2-4: 1, and the proportion can be adjusted according to the situation, and the invention is in the protection scope. The final mixture can not contain too much fly ash to cause dust emission, and can not contain too much sludge, otherwise, the environment-friendly requirement is difficult to meet.
After the mixed fertilizer is formed, conveying the mixed fertilizer to an empty place through a conveyor belt for storage; and moving the mixed fertilizer to a transport dump truck through a loader and transporting the mixed fertilizer to various places.
On the basis of the fly ash municipal sludge treatment method provided by each specific embodiment, the step of stirring and mixing the fly ash and the municipal sludge further comprises the following steps: conveying the fly ash to a secondary regulation room from a fly ash storage bin through an air conveying system; conveying the fly ash to a secondary stirrer from a secondary regulation room through a secondary impeller; the mud cake is conveyed to a secondary sludge charging hopper from a sludge storage bin through a loader; conveying the municipal sludge from a secondary sludge charging hopper to a secondary stirrer through a secondary screw pump; conveying the fly ash and the municipal sludge to a secondary stirrer simultaneously for stirring and mixing, and adding water into the secondary stirrer to form humidity-adjusting fly ash; and conveying the humidity-adjusting fly ash to a humidity-adjusting finished product storage bin.
When the yield of the fly ash is excessive, the fly ash can be conveyed to a secondary stirrer to be mixed with water, the water is mixed through a water tank to form the humidity-adjusting fly ash with the water content of 10%, and the humidity-adjusting fly ash can be stored as a backup. When the demand of the fly ash is increased sharply, the primary stirrer and the secondary stirrer can be started simultaneously, and the production capacity is increased by working simultaneously.
The specific working process is as follows: cooling the fly ash generated by the coal-fired boiler; conveying the fly ash to an ash storage yard; then transporting the fly ash to a fly ash storage bin.
Carrying out chemical conditioning on municipal sludge generated by a sewage treatment plant and dehydrating the sludge by using a vacuum filter press to form a sludge cake; then the sludge is conveyed to a sludge storage bin.
Conveying the fly ash to a main control room; transporting the fly ash to a main mixer through a main impeller;
conveying the mud cake to a main sludge charging hopper; conveying the municipal sludge to a main stirrer through a main screw pump;
conveying the fly ash and the municipal sludge to a main stirrer simultaneously for stirring and mixing to form a mixed fertilizer; and conveying the mixed fertilizer to a mixed product storage bin.
And (5) moving the mixed fertilizer to a transport dump truck and transporting the mixed fertilizer to various places.
When the produced fly ash is excessive or the capacity needs to be increased, the fly ash is conveyed to a secondary regulation room at the same time; then conveying the fly ash to a secondary stirrer;
conveying the mud cakes to a secondary sludge charging hopper; then conveying the municipal sludge to a secondary stirrer;
conveying the fly ash and the municipal sludge to a secondary stirrer simultaneously for stirring and mixing, and adding water into the secondary stirrer to form humidity-adjusting fly ash;
the humidity-adjusting fly ash is conveyed to a humidity-adjusting finished product storage bin, and then the humidity-adjusting fly ash can be conveyed to a mixed product storage bin from the humidity-adjusting finished product storage bin for unified treatment.
The specific embodiment of the invention also provides a fly ash municipal sludge treatment system applying the method, which comprises the following steps: the coal ash storage bin is used for storing coal ash powder generated by the coal-fired boiler; the main control room is connected with the fly ash storage bin through an air conveying system and used for temporarily storing the fly ash and stabilizing unstable fluctuating airflow in the pneumatic conveying process; the sludge storage bin is used for storing municipal sludge generated by a sewage treatment plant; the main sludge charging hopper is used for temporarily storing the municipal sludge; the main stirrer is communicated with the main control room through a main impeller, communicated with the main sludge charging hopper through a main screw pump and used for mixing and stirring the fly ash and the municipal sludge; and the mixed product storage bin is used for storing the formed mixed fertilizer.
The secondary regulation and control room is connected with the fly ash storage bin through an air conveying system and used for temporarily storing the fly ash and stabilizing unstable fluctuating airflow in the pneumatic conveying process; the secondary sludge charging hopper is used for temporarily storing the municipal sludge; the secondary stirrer is communicated with the secondary regulation and control room through a secondary impeller, and communicated with the secondary sludge charging hopper through a secondary screw pump, and is used for mixing and stirring the fly ash and the municipal sludge; the water tank is communicated with the secondary stirrer and is used for adding water into the secondary stirrer; and the humidity-adjusting finished product storage bin is used for storing the formed humidity-adjusting fly ash.
The fly ash municipal sludge treatment method and system provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A fly ash municipal sludge treatment method is characterized by comprising the following steps:
collecting fly ash generated by a coal-fired boiler;
collecting and dehydrating municipal sludge generated by a sewage treatment plant;
and stirring and mixing the fly ash and the municipal sludge, releasing heat, and further curing and sterilizing to form the mixed fertilizer.
2. The fly ash municipal sludge treatment method according to claim 1, wherein said collecting fly ash produced by a coal-fired boiler comprises the steps of:
cooling the fly ash produced by the coal-fired boiler;
conveying the fly ash to an ash storage yard;
and conveying the fly ash to a fly ash storage bin from the fly ash storage yard through a pneumatic conveyor.
3. The fly ash municipal sludge treatment method according to claim 2, wherein a dust collector is installed above the fly ash storage bin for collecting the fly ash during transportation.
4. The fly ash municipal sludge treatment method according to claim 3, wherein said collecting and dewatering of municipal sludge produced by a sewage treatment plant comprises the steps of:
chemically conditioning the municipal sludge produced by the sewage treatment plant and dehydrating the sludge by a vacuum filter press to form a sludge cake;
and conveying the mud cakes to a sludge storage bin through a transport dump truck.
5. The fly ash municipal sludge treatment method according to claim 4, wherein said stirring and mixing said fly ash and said municipal sludge comprises the steps of:
conveying the fly ash to a main control room from the fly ash storage bin through an air conveying system;
conveying the fly ash to a main stirrer from the main control room through a main impeller;
transporting the mud cake from the sludge storage bin to a main sludge hopper by a loader;
conveying the municipal sludge from the main sludge charging hopper to the main mixer through a main screw pump;
conveying the fly ash and the municipal sludge to the main stirrer simultaneously for stirring and mixing to form the mixed fertilizer;
and conveying the mixed fertilizer to a mixed product storage bin.
6. The fly ash municipal sludge treatment method according to claim 5, wherein the conveying speed is controlled by said main impeller and said main screw pump so that the mixing ratio of said fly ash and said municipal sludge by weight is in the range of 1:2 to 4: 1.
7. the fly ash municipal sludge treatment method according to claim 6, characterized by comprising the steps of, after forming said compost:
transporting the compost to an open place for storage by a conveyor belt;
and moving the mixed fertilizer to a transport dump truck through a loader and transporting the mixed fertilizer to various places.
8. The fly ash municipal sludge treatment method according to any one of claims 5 to 7, wherein said stirring and mixing said fly ash and said municipal sludge further comprises the steps of:
conveying the fly ash to a secondary regulation room from the fly ash storage bin through an air conveying system;
conveying the fly ash to a secondary stirrer from the secondary regulation and control room through a secondary impeller;
transporting the mud cake from the sludge storage bin to a secondary sludge hopper by a loader;
conveying the municipal sludge from the secondary sludge charging hopper to the secondary mixer by a secondary screw pump;
conveying the fly ash and the municipal sludge to the secondary stirrer simultaneously for stirring and mixing, and adding water to the secondary stirrer to form humidity-regulating fly ash;
and conveying the humidity-adjusting fly ash to a humidity-adjusting finished product storage bin.
9. A fly ash municipal sludge treatment system is characterized by comprising:
the coal ash storage bin is used for storing coal ash powder generated by the coal-fired boiler;
the main control room is connected with the fly ash storage bin through an air conveying system and used for temporarily storing the fly ash and stabilizing unstable fluctuating airflow in the pneumatic conveying process;
the sludge storage bin is used for storing municipal sludge generated by a sewage treatment plant;
the main sludge charging hopper is used for temporarily storing the municipal sludge;
the main stirrer is communicated with the main control room through a main impeller, communicated with the main sludge charging hopper through a main screw pump and used for mixing and stirring the fly ash and the municipal sludge;
and the mixed product storage bin is used for storing the formed mixed fertilizer.
10. The fly ash municipal sludge treatment system according to claim 9, further comprising:
the secondary regulation room is connected with the fly ash storage bin through an air conveying system and is used for temporarily storing the fly ash and stabilizing unstable fluctuating airflow in the pneumatic conveying process;
the secondary sludge charging hopper is used for temporarily storing the municipal sludge;
the secondary stirrer is communicated with the secondary regulation and control room through a secondary impeller, communicated with the secondary sludge charging hopper through a secondary screw pump and used for mixing and stirring the fly ash and the municipal sludge;
the water tank is communicated with the secondary stirrer and is used for adding water into the secondary stirrer;
and the humidity-adjusting finished product storage bin is used for storing the formed humidity-adjusting fly ash.
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