CN111237777A - Device and method for mixed sludge burning of medium-speed coal mill - Google Patents

Device and method for mixed sludge burning of medium-speed coal mill Download PDF

Info

Publication number
CN111237777A
CN111237777A CN202010027581.3A CN202010027581A CN111237777A CN 111237777 A CN111237777 A CN 111237777A CN 202010027581 A CN202010027581 A CN 202010027581A CN 111237777 A CN111237777 A CN 111237777A
Authority
CN
China
Prior art keywords
sludge
coal
pipe
medium
coal mill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010027581.3A
Other languages
Chinese (zh)
Inventor
项群扬
吴业成
裘立春
张海丹
杨威
黄华俊
刘凯锐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Energy Group Research Institute Co Ltd
Original Assignee
Zhejiang Energy Group Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Energy Group Research Institute Co Ltd filed Critical Zhejiang Energy Group Research Institute Co Ltd
Priority to CN202010027581.3A priority Critical patent/CN111237777A/en
Publication of CN111237777A publication Critical patent/CN111237777A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/18Adding fluid, other than for crushing or disintegrating by fluid energy
    • B02C23/24Passing gas through crushing or disintegrating zone
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/13Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/033Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • F23G5/442Waste feed arrangements
    • F23G5/444Waste feed arrangements for solid waste
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • F23G5/46Recuperation of heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00Pretreatment
    • F23G2201/80Shredding
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00Waste heat recuperation
    • F23G2206/20Waste heat recuperation using the heat in association with another installation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Disintegrating Or Milling (AREA)

Abstract

The invention relates to a device for mixed combustion of sludge by a medium-speed coal mill, which comprises: the device comprises a sludge pool, a filter screen, a plunger pump, a coal mill sludge electric isolation valve, a medium-speed coal mill, a coal feeder outlet electric valve, a coal dropping pipe inner sleeving pipe, a related connecting pipeline and a circular sleeve. The invention has the beneficial effects that: the core problem that the blockage of a pulverizing system is easily caused by directly mixing and burning sludge in the pulverizing system is technically solved by combining the structural characteristics of a coal dropping pipe on a medium-speed coal mill; the problem of odor overflow in the sludge conveying and drying process is solved; the coal mill is also used as sludge drying equipment, so that special sludge drying equipment is not required to be added, and the investment is saved; the sludge blending combustion method of the invention fully utilizes the original process of the boiler, fully utilizes the residual heat of the flue gas and the heat value of the sludge, does not need to newly add a heat source and equipment for drying the sludge, and has the advantages of investment saving, strong practicability, low operation cost, no secondary pollution and the like.

Description

Device and method for mixed sludge burning of medium-speed coal mill
Technical Field
The invention relates to a method for harmless treatment and resource utilization of sludge, in particular to a device and a method for mixed burning of sludge by a medium-speed coal mill.
Background
Sludge is an unavoidable by-product of the sewage treatment process. Generally contains pathogenic microorganisms, parasitic ova, harmful heavy metals, a large amount of refractory substances and the like, and must be effectively disposed of so as to minimize the influence on the environment. In addition, the sludge has higher heat value, can be used as fuel after drying treatment, and can be used as building materials because the chemical components of the sludge after combustion treatment are similar to those of the clay, so that the sludge can be reasonably utilized, and the waste can be changed into valuable, thereby becoming a resource.
At present, the coal-fired sludge coupling incineration mainly adopts a circulating fluidized bed boiler, the boiler accounts for a small amount of boiler equipment which is put into operation in China, the newly-built boiler has large investment and high operation cost, and the sludge treatment cost is greatly reduced by the nearby mixed combustion treatment of the sludge.
The utilization of sludge as fuel is a better sludge resource utilization method, and related patents and practices exist. The patent 'sludge treatment method for drying sludge and generating power by using a power plant coal mill', with application number 200910155710.0, sludge is conveyed to the upper part of the coal mill through a metering pump, sludge is introduced into the coal mill through a sludge feeder, the patent describes in detail a conical flow guide powder return device below a separator of the coal mill, and the sludge is mixed with raw coal in the device and then enters a grinding bowl of the coal mill to be ground. In the patent 'method for directly co-firing sludge in environment-friendly pulverized coal furnace' with application number 201810431066.4, a coal mill is adopted to directly dry sludge, but a specific method for feeding sludge into the coal mill is not given. The patent 200820085305.7 entitled sludge treatment system for pulverized coal boiler in power station adopts a spiral sludge drying and forming machine and high-temperature steam to dry sludge, and then the sludge is fed into a coal mill together with coal for grinding. The key technologies of the patents relate to solving the problem of high water content of sludge, and the sludge treatment method for drying the sludge by using a coal mill in a power plant and using the sludge for power generation easily causes coal blockage of a coal dropping pipe due to high water content of the sludge, low temperature of raw coal, uneven mixing and the like, and influences safe and stable operation of powder preparation; the method for directly mixing and burning the sludge in the environment-friendly pulverized coal furnace describes a system for directly drying the sludge by using a coal mill, and does not solve the core problem that the coal mill directly mixes and burns the sludge with high water content and is easy to block coal. The sludge treatment system utilizing the pulverized coal boiler of the power station adopts high-temperature steam to dry sludge, and has certain limitation in application as a mixed combustion treatment method. The sludge is dried and then sent into a pulverizing system through a coal conveying belt, and the main purpose is to prevent wet sludge containing a large amount of external moisture from blocking the pulverizing system, so that the safe and stable operation of the pulverizing system and even a boiler is endangered. The conventional drying methods comprise high-temperature steam drying and high-temperature flue gas drying, and the high-temperature steam or flue gas drying needs special drying equipment, so that the investment is large, and the operation and maintenance cost is high. Therefore, the method for drying and incinerating the sludge by fully utilizing the existing equipment and system without adding new sludge drying equipment and tail gas purification equipment or endangering the safe and stable operation of the existing equipment and system is developed, the sludge treatment cost is reduced, and the resource utilization of the sludge in a large boiler is promoted.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a device and a method for sludge mixed combustion of a medium-speed coal mill.
The device for mixing and burning the sludge of the medium speed coal mill is characterized by comprising the following components: the device comprises a sludge pool, a filter screen, a plunger pump, a coal mill sludge electric isolation valve, a medium-speed coal mill, a coal feeder outlet electric valve, a coal dropping pipe inner sleeving pipe, a relevant connecting pipeline and a circular sleeve;
the inlet of the plunger pump is connected with a sludge tank, the inlet of the plunger pump is provided with a filter screen, and the outlet of the plunger pump is directly connected with one end of the circular sleeve;
the other end of the round sleeve is provided with a coal mill sludge electric isolation valve; the coal mill sludge electric isolation valve is connected with a sludge small pipe in a coal dropping pipe inner sleeve pipe and a related connecting pipeline;
the inlet of the coal feeder outlet electric valve is connected with the outlet of the coal feeder, and the outlet of the coal feeder outlet electric valve is connected with a coal dropping pipe in the coal dropping pipe inner sleeve pipe and a coal dropping pipe in a related connecting pipeline;
the sludge small pipe is arranged in a coal dropping pipe at the lower part of an electric valve at the outlet of the coal feeder, and the outlet of the sludge small pipe is flush with the outlet of the coal dropping pipe; preventing wet sludge from blocking the coal dropping pipe;
and the sludge small pipe and the coal dropping pipe are connected to a medium-speed coal mill.
Preferably, the pipe diameter of the sludge small pipe is smaller than 1/10 of the pipe diameter of the coal dropping pipe, the original coal dropping pipe is not required to be replaced, and the normal use of the original coal dropping pipe is not influenced.
The use method of the sludge mixing and burning device of the medium speed coal mill comprises the following steps:
1) filtering sludge with the water content of 70-90% in the sludge pool by a filter screen, and directly pumping the sludge into a medium-speed coal mill by a plunger pump from a small sludge pipe arranged in a coal dropping pipe at the lower part of an electric valve at the outlet of the coal feeder;
2) heating part cold primary air of boiler flue gas becomes hot air, and the hot air and cold air are mixed and supplied at an inlet of a medium-speed coal mill; mixing, crushing and drying the sludge pumped into the medium-speed coal mill and the fire coal supplied to the medium-speed coal mill by the coal feeder;
3) and (3) spraying the sludge powder and the coal powder into the boiler in the step 2) for combustion by the mixed cold air and hot air.
Preferably, the sludge doped into the fire coal in the step 1 is 2-10% of the fire coal.
Preferably, the outlet of a sludge tubule in the coal dropping pipe arranged at the lower part of the electric valve at the outlet of the coal feeder is flush with the outlet of the coal dropping pipe, so that the wet sludge is prevented from blocking the coal dropping pipe; the pipe diameter of the sludge small pipe is smaller than 1/10 of the pipe diameter of the coal dropping pipe, the original coal dropping pipe is not required to be replaced, and the normal use of the original coal dropping pipe is not influenced.
Preferably, when sludge is doped into the fire coal in the step 1, the medium-speed coal mill stably operates above the lowest load of safe operation of the coal mill.
Preferably, the medium speed coal mill in the step 1 is provided with a cold air adjusting baffle and a hot air adjusting baffle, and the hot air adjusting baffle has an adjusting allowance.
Preferably, the sludge passes through a coal mill sludge electric isolating valve before entering the medium-speed coal mill, and the coal mill sludge electric isolating valve is used for isolating the sludge when the system is shut down, so that the sludge is prevented from entering the shut-down coal mill.
The invention has the beneficial effects that: the core problem that the blockage of a pulverizing system is easily caused by directly mixing and burning sludge in the pulverizing system is technically solved by combining the structural characteristics of a coal dropping pipe on a medium-speed coal mill; the problem of odor overflow in the sludge conveying and drying process is solved; the coal mill is also used as sludge drying equipment, so that special sludge drying equipment is not required to be added, and the investment is saved; the sludge is dried by hot air of the coal mill, so that the hot primary air rate is increased, and the waste heat of the flue gas is fully utilized; the sludge blending combustion method of the invention fully utilizes the original process of the boiler, fully utilizes the residual heat of the flue gas and the heat value of the sludge, does not need to newly add a heat source and equipment for drying the sludge, and has the advantages of investment saving, strong practicability, low operation cost, no secondary pollution and the like.
Drawings
FIG. 1 is a process flow diagram of a sludge blending combustion method for a medium speed coal mill;
FIG. 2 is a view showing a structure of a medium speed coal mill (HP type) for drying sludge;
FIG. 3 is a diagram of a method and an apparatus for direct sludge blending combustion of a medium speed coal mill.
The device comprises a sludge pool 1, a filter screen 2, a plunger pump 3, a coal mill sludge electric isolation valve 4, a medium-speed coal mill 5, a coal feeder 6, a coal feeder outlet electric valve 7, a coal dropping pipe inner sleeve pipe and a related connecting pipeline 8.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for a person skilled in the art, several modifications can be made to the invention without departing from the principle of the invention, and these modifications and modifications also fall within the protection scope of the claims of the present invention.
A method and a device for sludge mixed burning of a medium speed coal mill comprise the following steps: the device comprises a sludge pool 1, a filter screen 2, a plunger pump 3, a coal mill sludge electric isolation valve 4, a medium-speed coal mill 5, a coal feeder 6, a coal feeder outlet electric valve 7, a coal dropping pipe inner sleeve pipe, a related connecting pipeline 8 and a circular sleeve 9; the sludge tank is used for storing sludge.
An inlet of the plunger pump 3 is connected with a sludge tank 1, an inlet of the plunger pump 3 is provided with a filter screen 2, and an outlet of the plunger pump 3 is directly connected with one end of a circular sleeve 9; the other end of the round sleeve 9 is provided with a coal mill sludge electric isolation valve 4; the coal mill sludge electric isolation valve 4 is connected with a sludge small pipe in a coal dropping pipe inner sleeve pipe and a related connecting pipeline 8; the inlet of the coal feeder outlet electric valve 7 is connected with the outlet of the coal feeder 6, and the outlet of the coal feeder outlet electric valve 7 is connected with a coal dropping pipe in a coal dropping pipe inner sleeve pipe and a coal dropping pipe in a related connecting pipeline 8; the sludge tubule is arranged in the coal dropping pipe at the lower part of the electric valve 7 at the outlet of the coal feeder, and the outlet of the sludge tubule is flush with the outlet of the coal dropping pipe, so that wet sludge is prevented from blocking the coal dropping pipe; the sludge small pipe and the coal dropping pipe are connected to a medium-speed coal mill 5; the pipe diameter of the sludge small pipe is smaller than 1/10 of the pipe diameter of the coal dropping pipe, the original coal dropping pipe is not required to be replaced, and the normal use of the original coal dropping pipe is not influenced.
The filter screen 2 at the inlet of the plunger pump 3 is used for filtering substances which have large volume or large particle size and are difficult to be conveyed by the plunger pump 3. The plunger pump 3 is used for conveying the sludge and increasing the pressure of the sludge. The electronic isolating valve 4 of coal pulverizer mud is used for the isolation of system, closes manual isolating valve when the system overhauls, prevents that plunger pump 3 from starting suddenly and sending into medium speed coal pulverizer 5 with mud. The coal dropping pipe is sleeved with the pipe and is used for directly conveying wet sludge to a 5-bowl grinding machine of a medium-speed coal mill, so that the coal blockage of a coal pulverizing system caused by the wet sludge is prevented. The position of the sludge small pipe connected into the coal dropping pipe is arranged at the lower part of the electric valve 7 at the outlet of the coal feeder, otherwise, the opening and closing of the valve are influenced.
The use method of the sludge mixing and burning device of the medium speed coal mill comprises the following steps:
1) after sludge with the water content of 70-90% in the sludge pool 1 is filtered by a filter screen 2, the sludge is directly pumped into a medium-speed coal mill 5 by a plunger pump 3 from a sludge tubule in a coal dropping pipe arranged at the lower part of an electric valve 7 at the outlet of the coal feeder;
2) heating part cold primary air of boiler flue gas becomes hot air, and the hot air and cold air are mixed and supplied at an inlet of a medium-speed coal mill 5; mixing, crushing and drying the sludge pumped into the medium-speed coal mill 5 and the fire coal supplied to the medium-speed coal mill 5 by the coal feeder 6;
3) and (3) spraying the sludge powder and the coal powder into the boiler in the step 2) for combustion by the mixed cold air and hot air.
And (2) the proportion of sludge doped into the fire coal in the step 1 is 2-10% of that of the fire coal.
When sludge is doped into the fire coal in the step 1, the medium-speed coal mill 5 stably operates above the lowest load of safe operation of the coal mill.
And step 1, the medium-speed coal mill 5 is provided with a cold air adjusting baffle and a hot air adjusting baffle, and the hot air adjusting baffle has an adjusting allowance.
Before entering a medium-speed coal mill 5, the sludge passes through a coal mill sludge electric isolating valve 4, and the coal mill sludge electric isolating valve 4 is used for isolating the sludge when the system is stopped, so that the sludge is prevented from entering the stopped coal mill.
Example (b):
the installed capacity is 1000MW power plant, when the unit load is 1000MW, 5 coal mills operate, 1 stand-by, the biggest continuous output of single coal mill is 80t/h. Therefore, the following assumptions are made:
1) the coal amount of a single coal mill is 60t/h, and the sludge amount is 10%.
2) Assuming that the water content of the sludge is 85%, according to a sludge water content-density relation graph, the corresponding theoretical density d of the sludge is 1.1017 g/ml.
3) An S-shaped pendulum plunger pump produced by a certain company is selected. Maximum conveying capacity of 10m3H is used as the reference value. The pumping amount can be adjusted steplessly according to requirements, and the pumping amount is assumed to be D-6 t/h (slightly less than 6 m)3/h)
4) The conveying speed v is 0.5 m/s.
According to pi r2=D÷v÷3600
R.apprxeq. 32.57mm, i.e. a tube diameter of 65mm, can be calculated.
As shown in FIG. 2, the diameter of the coal dropping pipe on the coal mill is 771 mm. According to the calculation result, a circular pipeline with the pipe diameter of 65mm is arranged in the upper coal dropping pipe, the pipe diameter is less than 1/10 of the pipe diameter of the original coal dropping pipe, the sectional area of the pipeline is less than 1/100 of the coal dropping pipe, and the influence on the original coal dropping pipe can be ignored.
The coal amount of a single coal mill is 60t/h, 5 coal mills are operated, 1 coal mill is reserved, and the boiler can be used for mixing and burning 6 multiplied by 5 multiplied by 24 which is 720 tons of wet sludge every day. Therefore, the invention has stronger practicability and can effectively improve the sludge mixed combustion capacity of the large-scale boiler.

Claims (8)

1. The utility model provides a device that is used for medium speed coal pulverizer to mix burning mud which characterized in that includes: the device comprises a sludge pool (1), a filter screen (2), a plunger pump (3), a coal mill sludge electric isolation valve (4), a medium-speed coal mill (5), a coal feeder (6), a coal feeder outlet electric valve (7), a coal dropping pipe inner sleeved pipe, a related connecting pipeline (8) and a circular sleeve (9);
an inlet of the plunger pump (3) is connected with the sludge tank (1), a filter screen (2) is arranged at the inlet of the plunger pump (3), and an outlet of the plunger pump (3) is directly connected with one end of the circular sleeve (9);
the other end of the round sleeve (9) is provided with a coal mill sludge electric isolation valve (4); the coal mill sludge electric isolation valve (4) is connected with a sludge small pipe in a coal dropping pipe inner sleeve pipe and a related connecting pipeline (8);
an inlet of the coal feeder outlet electric valve (7) is connected with an outlet of the coal feeder (6), and an outlet of the coal feeder outlet electric valve (7) is connected with a coal dropping pipe in a coal dropping pipe inner sleeve pipe and a coal dropping pipe in a related connecting pipeline (8);
the sludge small pipe is arranged in a coal dropping pipe at the lower part of an electric valve (7) at the outlet of the coal feeder, and the outlet of the sludge small pipe is flush with the outlet of the coal dropping pipe;
the sludge small pipe and the coal dropping pipe are connected to a medium-speed coal mill (5).
2. The device for mixed sludge burning of the medium speed coal mill according to claim 1, is characterized in that: the pipe diameter of the sludge small pipe is smaller than 1/10 of the pipe diameter of the coal dropping pipe.
3. The use method of the sludge mixing and burning device of the medium speed coal mill according to claim 1 is characterized by comprising the following steps:
1) after sludge with the water content of 70-90% in the sludge pool (1) is filtered by a filter screen (2), the sludge is directly pumped into a medium-speed coal mill (5) by a plunger pump (3) from a small sludge pipe arranged in a coal dropping pipe at the lower part of an electric valve (7) at the outlet of the coal feeder;
2) partial cold primary air heated by boiler flue gas is changed into hot air, and the hot air and cold air are mixed and supplied at an inlet of a medium-speed coal mill (5); mixing, crushing and drying the sludge pumped into the medium-speed coal mill (5) and the fire coal supplied to the medium-speed coal mill (5) by the coal feeder (6);
3) and (3) spraying the sludge powder and the coal powder into the boiler in the step 2) for combustion by the mixed cold air and hot air.
4. The use method of the sludge mixing and burning device of the medium speed coal mill according to claim 3, wherein the sludge mixing proportion in the fire coal in the step 1 is 2-10% of the fire coal.
5. The use method of the sludge mixing and burning device of the medium speed coal mill according to claim 3 is characterized in that: the outlet of a sludge small pipe in the coal dropping pipe arranged at the lower part of the electric valve (7) at the outlet of the coal feeder is flush with the outlet of the coal dropping pipe, and the pipe diameter of the sludge small pipe is smaller than 1/10 of the pipe diameter of the coal dropping pipe.
6. The use method of the sludge mixing and burning device of the medium speed coal mill according to claim 3 is characterized in that: when sludge is doped into the fire coal in the step 1, the medium-speed coal mill (5) stably operates above the lowest load of safe operation of the coal mill.
7. The use method of the sludge mixing and burning device of the medium speed coal mill according to claim 3 is characterized in that: the medium-speed coal mill (5) in the step 1 is provided with a cold air adjusting baffle and a hot air adjusting baffle, and the hot air adjusting baffle has an adjusting allowance.
8. The use method of the sludge mixing and burning device of the medium speed coal mill according to claim 3 is characterized in that: before entering a medium-speed coal mill (5), the sludge passes through a coal mill sludge electric isolating valve (4), and the coal mill sludge electric isolating valve (4) is used for isolating the sludge when the system is stopped.
CN202010027581.3A 2020-01-10 2020-01-10 Device and method for mixed sludge burning of medium-speed coal mill Pending CN111237777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010027581.3A CN111237777A (en) 2020-01-10 2020-01-10 Device and method for mixed sludge burning of medium-speed coal mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010027581.3A CN111237777A (en) 2020-01-10 2020-01-10 Device and method for mixed sludge burning of medium-speed coal mill

Publications (1)

Publication Number Publication Date
CN111237777A true CN111237777A (en) 2020-06-05

Family

ID=70864112

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010027581.3A Pending CN111237777A (en) 2020-01-10 2020-01-10 Device and method for mixed sludge burning of medium-speed coal mill

Country Status (1)

Country Link
CN (1) CN111237777A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112178671A (en) * 2020-09-30 2021-01-05 西安热工研究院有限公司 Method and system suitable for increasing direct blending combustion proportion of wet coal slime for pulverized coal fired boiler
CN113048491A (en) * 2021-04-29 2021-06-29 西安热工研究院有限公司 Sludge direct-doping coupling coal-fired boiler power generation system and method
CN113790456A (en) * 2021-08-31 2021-12-14 国网浙江省电力有限公司电力科学研究院 Method and system for calculating maximum sludge blending combustion amount of coal-fired boiler

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101723570A (en) * 2009-12-18 2010-06-09 浙江大学 Sludge treatment method for drying sludge by using coal grinding machine and using sludge for electricity generation
CN204100275U (en) * 2014-09-30 2015-01-14 上海援梦电力能源科技咨询中心 The pulverized coal preparation system that Ball Mill and fan mill combine
CN107238101A (en) * 2017-07-24 2017-10-10 西安热工研究院有限公司 A kind of wind powder mixing temperature and flow velocity secondary regulation system
CN108395072A (en) * 2018-05-08 2018-08-14 北京中矿环保科技股份有限公司 The method of the coal-powder boiler direct blending combustion sludge of environmental protection
CN209763129U (en) * 2019-03-19 2019-12-10 中国电力工程顾问集团华北电力设计院有限公司 System structure for coupling dried sludge into pulverizing system in whole-course closed mode to generate power
CN211694927U (en) * 2020-01-10 2020-10-16 浙江浙能技术研究院有限公司 Device for mixed burning of sludge by medium-speed coal mill

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101723570A (en) * 2009-12-18 2010-06-09 浙江大学 Sludge treatment method for drying sludge by using coal grinding machine and using sludge for electricity generation
CN204100275U (en) * 2014-09-30 2015-01-14 上海援梦电力能源科技咨询中心 The pulverized coal preparation system that Ball Mill and fan mill combine
CN107238101A (en) * 2017-07-24 2017-10-10 西安热工研究院有限公司 A kind of wind powder mixing temperature and flow velocity secondary regulation system
CN108395072A (en) * 2018-05-08 2018-08-14 北京中矿环保科技股份有限公司 The method of the coal-powder boiler direct blending combustion sludge of environmental protection
CN209763129U (en) * 2019-03-19 2019-12-10 中国电力工程顾问集团华北电力设计院有限公司 System structure for coupling dried sludge into pulverizing system in whole-course closed mode to generate power
CN211694927U (en) * 2020-01-10 2020-10-16 浙江浙能技术研究院有限公司 Device for mixed burning of sludge by medium-speed coal mill

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112178671A (en) * 2020-09-30 2021-01-05 西安热工研究院有限公司 Method and system suitable for increasing direct blending combustion proportion of wet coal slime for pulverized coal fired boiler
CN113048491A (en) * 2021-04-29 2021-06-29 西安热工研究院有限公司 Sludge direct-doping coupling coal-fired boiler power generation system and method
CN113790456A (en) * 2021-08-31 2021-12-14 国网浙江省电力有限公司电力科学研究院 Method and system for calculating maximum sludge blending combustion amount of coal-fired boiler
CN113790456B (en) * 2021-08-31 2023-08-15 国网浙江省电力有限公司电力科学研究院 Method and system for calculating maximum sludge blending combustion amount of coal-fired boiler

Similar Documents

Publication Publication Date Title
CN111237777A (en) Device and method for mixed sludge burning of medium-speed coal mill
CN101570388B (en) Harmless recycling treatment process for urban sludge
CN101551108B (en) Incineration treatment method of municipal sludge and device thereof
CN207659297U (en) Sludge drying couples coal generating system
CN201289091Y (en) Methane system for recovering and utilizing anaerobic sewerage station methane
CN104250060A (en) Biochemical sludge processing method
CN211694927U (en) Device for mixed burning of sludge by medium-speed coal mill
CN112050243A (en) Process for generating power by coupling sludge drying and incineration through middle storage type pulverizing system
CN107504492B (en) Industrial sludge, waste emulsion residue and metallurgical ash combined treatment system and power generation process thereof
CN109990296B (en) Flue gas circulation type coal and garbage coupling combustion system
CN213207855U (en) Composite fluidized bed sludge incineration treatment system
CN111320352B (en) Sludge treatment equipment
CN113048491A (en) Sludge direct-doping coupling coal-fired boiler power generation system and method
CN201059860Y (en) Three spraying environment-friendly type decompose stove
CN217342804U (en) System for preparing mineral wool by utilizing waste incineration high-temperature slag and high-temperature fly ash
CN213272635U (en) Sludge water-coal slurry blending combustion system of coal-fired boiler
CN212339254U (en) Ultrahigh-temperature thermal cyclone type household garbage treatment equipment
CN103265980A (en) Adjusting system and adjusting method for calorific value of synthetic gas of IGCC power station
CN103528054B (en) The organic working medium boiler of municipal sludge-water-coal-slurry multifuel combustion
CN113566230A (en) Method and system for realizing direct blending combustion and gasification of fine slag in pulverized coal fired boiler
CN105753274A (en) Sludge disposal system and sludge disposal technology
CN111520730A (en) Sludge-water-coal-slurry co-combustion system for coal-fired boiler and working method thereof
CN105570908A (en) Method and system for recycling and treating waste
CN205447766U (en) Burner of carbomorphism mud
CN205480943U (en) Power economized boiler

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination