CN208124329U - A kind of zero overflow system of thermal power plant's slag removing system pulp water - Google Patents
A kind of zero overflow system of thermal power plant's slag removing system pulp water Download PDFInfo
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- CN208124329U CN208124329U CN201820620271.0U CN201820620271U CN208124329U CN 208124329 U CN208124329 U CN 208124329U CN 201820620271 U CN201820620271 U CN 201820620271U CN 208124329 U CN208124329 U CN 208124329U
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Abstract
The utility model discloses a kind of zero overflow systems of thermal power plant's slag removing system pulp water,Each slag water cooler is respectively positioned in submerged slag conveyor shell,The water outlet of cooling water pump is connected through cooler water inlet main pipe with the entrance of each slag water cooler,The outlet of each slag water cooler is connected with cooler return water main pipe,High water level liquidometer is provided in submerged slag conveyor shell,Low water level liquidometer and thermometer,Wherein,The output end of high water level liquidometer and the output end of low water level liquidometer are connected with the input terminal of tank level control system,The output end of tank level control system is connected with the control terminal of small pump,The water outlet of small pump is connected with the water supplement port of submerged slag conveyor shell,The output end of thermometer is connected with the input terminal of temperature control system,The output end of temperature control system is connected with the control terminal of cooling water pump,The system can be realized zero overflow of slag removing system,The rate of water make-up of thermal power plant's slag removing system is significantly reduced simultaneously.
Description
Technical field
The utility model belongs to waste water of heat-engine plant process field, is related to a kind of zero overflow system of thermal power plant's slag removing system pulp water
System.
Background technique
Thermoelectricity station-service, displacement are big, and pollutant load is high in waste discharge.In recent years,《Water prevention and cure of pollution action plan》,
The environmental protection policies such as Pollutant Discharge Permit System, method are gradually implemented, it is desirable that Thermal Power Enterprises must carry out that full factory is water-saving and waste water is comprehensive
It administers, slag removing system is important link therein.Currently, most of thermal power plant uses wet slag removing system, bottom slag is fished out by scraper plate
Slag machine is pulled out, and entrucking is transported outward after being delivered to drainage bin dehydration.To make pulp water maintain 60 DEG C of design temperature hereinafter, slag removing system removes
Outside supplement evaporation and the water for dragging slag to lose, also need additionally to supplement a large amount of water at low temperature, leading to slag removing system, there are a large amount of overflow waters.
Pulp water water quality is complicated, it is difficult to handle, if direct emission has very big environmentally friendly risk.Therefore, not outlet is recycled after should handling.
Current portions thermal power plant realized by the way of " dragveyer → concentration basin → buffering sump " pulp water natural sedimentation and
It cools, then recycles.The method takes up a large area, and rotating machinery is more, and maintenance workload is big, and operating cost is high, and
It still needs to supplement more water at low temperature in actual motion case.Part thermal power plant slag removing system uses external slag water cooler, the skill
Power plant's application is more early at home for art, and it is also more that there are problems, mainly has：Pump easily breaks down, and valve, pipe wear are serious；Slag
There are leakage situations for water；Running environment is poor around equipment；Rate of water make-up is big, supplements the salinity that water and clinker are brought into and is not easy to balance；Slag
Water walks cooler tube side, and the easy fouling of heat transfer tube wall causes cooling effect decline even heat exchange blockage, it is necessary to carry out at antiscale
Reason and regular pickling；Pulp water sends out dragveyer and enters cooler, needs the power-equipments such as pump, energy consumption is high, and film-cooled heat is big, once
Property investment it is high.
Therefore, it is necessary to utility model a kind of novel slag water treatment system and method, the realization slag removing systems of economical and efficient
Zero overflow.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of thermal power plant's slag removing system slag
Zero overflow system of water, which can be realized zero overflow of slag removing system, while significantly reduce the rate of water make-up of thermal power plant's slag removing system,
And occupied area is small, at low cost.
In order to achieve the above objectives, zero overflow system of thermal power plant's slag removing system pulp water described in the utility model includes scraper plate fishing
Slag casing body, cooling water pump, cooler water inlet main pipe, cooler return water main pipe, tank level control system, small pump, temperature control
System, cooling water pump and several slag water coolers；
Each slag water cooler is respectively positioned in submerged slag conveyor shell, the water outlet of cooling water pump through cooler water inlet main pipe with
The entrance of each slag water cooler is connected, and the outlet of each slag water cooler is connected with cooler return water main pipe, submerged slag conveyor
High water level liquidometer, low water level liquidometer and thermometer are disposed in shell from top to bottom, wherein high water level liquidometer
The output end of output end and low water level liquidometer is connected with the input terminal of tank level control system, the output of tank level control system
End is connected with the control terminal of small pump, and the water outlet of small pump is connected with the water supplement port of submerged slag conveyor shell, thermometer
Output end be connected with the input terminal of temperature control system, the control terminal phase of the output end and cooling water pump of temperature control system
Connection.
The outlet of small pump is connected through water compensating valve with the water supplement port of submerged slag conveyor shell.
The outside of each slag water cooler is provided with shield.
The entrance of slag water cooler and outlet are in diagonal distribution.
The entrance of slag water cooler and exit are provided with the flange for connecting external pipeline.
The thermal coefficient of each slag water cooler (2) material therefor is 8~10 times of common iron.
Each slag water cooler is arranged in parallel way, and the entrance of each slag water cooler and exit are provided with cut-off
Valve.
Each slag water cooler is located at the intracorporal two sides of submerged slag conveyor shell.
The utility model has the advantages that：
Zero overflow system of thermal power plant's slag removing system pulp water described in the utility model is when specific operation, in submerged slag conveyor
Several slag water coolers of installation in shell, and each slag water cooler is connected with cooler water inlet main pipe and cooler return water main pipe
It is logical, heat extra in pulp water in submerged slag conveyor shell is taken away by built-in slag water cooler, to reduce evaporation capacity, simultaneously
It is cooperated by high water level liquidometer, low water level liquidometer and tank level control system, makes the intracorporal pulp water of submerged slag conveyor shell
It maintains within the scope of scheduled liquid level, really realizes zero overflow of slag removing system, to thoroughly release pulp water leakage, asking of leaking
Topic avoids the easy failure of external slag water cooler bring water pump, valve and the serious problem of pipe wear, slag removing system water damage
Lose smaller, the easy balance of the salt amount that supplement water and clinker are brought into, without dirty removing processing.In addition, by the way that slag water cooler is arranged
In in submerged slag conveyor shell, occupied area is small, and cost is relatively low, and environmental protection benefit is more obvious.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1 it is submerged slag conveyor shell, 2 be slag water cooler, 3 be temperature control system, 4 be cooling water pump, 5 is
Cooler water inlet main pipe, 6 be cooler return water main pipe, 7 be high water level liquidometer, 8 be low water level liquidometer, 9 be Liquid level
System, 10 be small pump, 11 be water compensating valve, 12 be thermometer.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing：
With reference to Fig. 1, zero overflow system of thermal power plant's slag removing system pulp water described in the utility model includes submerged slag conveyor shell
Body 1, cooling water pump 4, cooler water inlet main pipe 5, cooler return water main pipe 6, tank level control system 9, small pump 10, temperature control
System 3, cooling water pump 4 and several slag water coolers 2；Each slag water cooler 2 is respectively positioned in submerged slag conveyor shell 1, cooling water
The water outlet of pump 4 is connected through cooler water inlet main pipe 5 with the entrance of each slag water cooler 2, the outlet of each slag water cooler 2 and
Cooler return water main pipe 6 is connected, and is disposed with high water level liquidometer 7, low water level in submerged slag conveyor shell 1 from top to bottom
Liquidometer 8 and thermometer 12, wherein the output end of the output end of high water level liquidometer 7 and low water level liquidometer 8 with liquid level control
The input terminal of system 9 processed is connected, and the output end of tank level control system 9 is connected with the control terminal of small pump 10, small pump 10
Water outlet be connected with the water supplement port of submerged slag conveyor shell 1, the input of the output end of thermometer 12 and temperature control system 3
End is connected, and the output end of temperature control system 3 is connected with the control terminal of cooling water pump 4, in addition, 2 institute of each slag water cooler
With 8~10 times that the thermal coefficient of material is common iron.
The outlet of small pump 10 is connected through water compensating valve 11 with the water supplement port of submerged slag conveyor shell 1；Each slag water cooler 2
Outside be provided with shield；The entrance of slag water cooler 2 and outlet are in diagonal distribution；The entrance of slag water cooler 2 and go out
The flange for connecting external pipeline is provided at mouthful；Each slag water cooler 2 is arranged in parallel way, and each slag water cooler
2 entrance and exit are provided with shut-off valve；Each slag water cooler 2 is located at the two sides in submerged slag conveyor shell 1.
The number of units of slag water cooler 2 is according to the heat exchange area demand of Heat balance calculation and submerged slag conveyor shell 1
Length, width and height are determined, and each slag water cooler 2 is by the way of in parallel, when one of slag water cooler 2 damages
When, then corresponding shut-off valve is closed, to block the slag water cooler 2.
In addition, the specific work process of the utility model is：
Tank level control system 9 passes through 7 real-time detection submerged slag conveyor shell 1 of low water level liquidometer 8 and high water level liquidometer
The liquid level information of interior water, when the liquid level in submerged slag conveyor shell 1 is lower than low water level liquidometer 8, tank level control system 9 is controlled
Small pump 10 is started to work, when the liquid level in submerged slag conveyor shell 1 is greater than or equal to high water level liquidometer 7, Liquid level
System 9 controls small pump 10 and stops working, it is ensured that the rate of water make-up of submerged slag conveyor shell 1 and evaporation and drags slag etc. and loses water phase
Matching keeps water balance, realizes zero overflow of pulp water.In addition, temperature control system 3 is fished out by 12 real-time detection scraper plate of thermometer
The temperature of water in slag casing body 1, when the temperature of water in submerged slag conveyor shell 1 is more than or equal to preset temperature, temperature control system
3 control cooling water pump 4 of system works, and cooling water pump 4 drives the cooling water in cooler water inlet main pipe 5 to enter each slag water cooler
It in 2, and exchanges heat in slag water cooler 2 with the pulp water in submerged slag conveyor shell 1, to reduce submerged slag conveyor shell 1
The temperature of interior pulp water, the cooling water after exchanging heat enter in cooler return water main pipe 6.
Embodiment one
The slag removing system of certain 2 × 300MW coal unit uses the utility model, and slag removing system original uses dragveyer-slag
Storehouse treatment process, it is 6t/h that single unit, which produces the quantity of slag,.
Specific implementation method and step：
1, Heat balance calculation
1) Unit Weight (ton) warm sludge distributes the calculating of heat
(850 DEG C -60 DEG C) × 0.97kJ/ (kg DEG C) × 1000kg=766300kJ.
Wherein, slag temperature is based on 850 DEG C, and dragveyer furnace bottom seals coolant-temperature gage based on 60 DEG C, and clinker specific heat capacity is pressed
(kg DEG C) of 0.97kJ/ meter.
2) pulp water vaporizes the heat Calculation taken away
Unit volume (1m3) the heat that is absorbed when being increased to 100 DEG C by 30 DEG C of water be 1m3×1000kg/m3×
4.20kJ/ (kg DEG C) × (100 DEG C -30 DEG C)=285600kJ
Unit volume (1m3) water to become heat that 100 DEG C of vapor are absorbed from 100 DEG C of liquid be 1m3×1000kg/
m3× 2258.40kJ/kg=2258400kJ
Unit volume (1m3) temperature is vapor that 30 DEG C of water is transformed into 100 DEG C, the heat absorbed adds up to
2544000kJ
Wherein, for dragveyer moisturizing temperature based on 30 DEG C, the specific heat capacity of water presses 4.20 × 103(kg DEG C) of J/ meter, 100 DEG C of water
Heat of vaporization be 2258.40kJ/kg meter.
Vaporization water is about 0.15m caused by Unit Weight (ton) warm sludge3, the heat thus taken away is 381600kJ.
3) slag shrinkage water takes away the calculating of heat
Under normal conditions, the warm sludge of Unit Weight (ton) takes away 0.30m3Water.
Slag Cang Shui takes away heat：1000kg/m3×0.30m3× 4.20kJ/ (kg DEG C) × 60 DEG C=75600kJ
4) calculating of Unit Weight (ton) warm sludge after-heat
1 ton of warm sludge after-heat is：766300kJ-381600kJ-75600kJ=309100kJ
5) calculating of cooling water inflow needed for Unit Weight (ton) warm sludge
The waste heat that warm sludge generates need to be taken away by cooling water, just be able to maintain slag water temperature no more than 60 DEG C；Cooling hydromining
With recirculated water, initial water temperature is 30 DEG C, and water temperature is 40 DEG C after heat exchange, then has：
The heat that 1 ton of cooling water is absorbed when being increased to 40 DEG C by 30 DEG C：1m3×1000kg/m3×4.20kJ/(kg·
DEG C) × (40 DEG C -30 DEG C)=42000kJ.
It is computed, the after-heat 309100kJ that 1 ton of warm sludge generates needs about 7.4 tons of cooling waters to carry out heat exchange.Consider
Situations such as increasing suddenly to quantity of slag such as boiler soot-blowings, there are enough surpluses when design, 1t warm sludge is calculated by 10t cooling water.
6) calculating of the heat exchanger into return water main pipe caliber
Based on the practical production quantity of slag 6t/h of every unit, heat exchanger is into return water main pipe caliber
7) calculating of heat exchange area and cooler number of units
Based on the practical production quantity of slag 6t/h of every unit, heat exchange area A=24 × 6m2=144m2, need slag water cooler 2
Quantity N=6 × 6=36 group, is respectively arranged at the inside of submerged slag conveyor shell 1.
2, the calculating of water balance
The practical production quantity of slag of every 300MW unit is 6t/h, is about by vaporization water caused by Unit Weight (ton) warm sludge
0.15m3, slag is dragged to take away 0.30m3Water meter, then separate unit dragveyer loss water amounts to 2.7m3/ h, then separate unit dragveyer rate of water make-up be
2.7m3Water balance can be realized when/h.
It is as follows according to the practical production quantity of slag of the power plant and surplus heat, specific embodiment：
The heat exchange area according to needed for Heat balance calculation, the feelings such as length, width and the height of submerged slag conveyor shell 1
36 sets of slag water coolers 2 can be arranged inside submerged slag conveyor shell 1, be distributed in inside submerged slag conveyor shell 1 for condition, the factory
Two sides.Cooler is arranged in the outside of submerged slag conveyor shell 1 to intake main pipe 5 and cooler return water main pipe 6, and respectively with
Each slag water cooler 2 is connected.
To prevent from falling into impact of the 1 inside slag of submerged slag conveyor shell to slag water cooler 2 from boiler, each pulp water is cooling
Device 2 is respectively provided with the shield of stainless steel material.
Claims (8)
1. a kind of zero overflow system of thermal power plant's slag removing system pulp water, which is characterized in that including submerged slag conveyor shell (1), cooling
Water pump (4), cooler water inlet main pipe (5), cooler return water main pipe (6), tank level control system (9), small pump (10), temperature control
System (3), cooling water pump (4) and several slag water coolers (2) processed；
Each slag water cooler (2) is respectively positioned in submerged slag conveyor shell (1), and the water outlet of cooling water pump (4) is intake through cooler
Main pipe (5) is connected with the entrance of each slag water cooler (2), the outlet and cooler return water main pipe (6) of each slag water cooler (2)
Be connected, be disposed in submerged slag conveyor shell (1) from top to bottom high water level liquidometer (7), low water level liquidometer (8) and
Thermometer (12), wherein the output end of the output end of high water level liquidometer (7) and low water level liquidometer (8) is and Liquid level
The input terminal of system (9) is connected, and the output end of tank level control system (9) is connected with the control terminal of small pump (10), moisturizing
The water outlet of pump (10) is connected with the water supplement port of submerged slag conveyor shell (1), and the output end and temperature of thermometer (12) control
The input terminal of system (3) is connected, and the output end of temperature control system (3) is connected with the control terminal of cooling water pump (4).
2. zero overflow system of thermal power plant's slag removing system pulp water according to claim 1, which is characterized in that small pump (10)
Outlet is connected through water compensating valve (11) with the water supplement port of submerged slag conveyor shell (1).
3. zero overflow system of thermal power plant's slag removing system pulp water according to claim 1, which is characterized in that each slag water cooler
(2) outside is provided with shield.
4. zero overflow system of thermal power plant's slag removing system pulp water according to claim 1, which is characterized in that each slag water cooler
(2) thermal coefficient of material therefor is 8~10 times of common iron.
5. zero overflow system of thermal power plant's slag removing system pulp water according to claim 1, which is characterized in that slag water cooler
(2) entrance and outlet is distributed in diagonal.
6. zero overflow system of thermal power plant's slag removing system pulp water according to claim 1, which is characterized in that slag water cooler
(2) entrance and exit is provided with the flange for connecting external pipeline.
7. zero overflow system of thermal power plant's slag removing system pulp water according to claim 1, which is characterized in that each slag water cooler
(2) it is arranged in parallel way, and the entrance of each slag water cooler (2) and exit are provided with shut-off valve.
8. zero overflow system of thermal power plant's slag removing system pulp water according to claim 1, which is characterized in that each slag water cooler
(2) it is located at the two sides in submerged slag conveyor shell (1).
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| CN201820620271.0U CN208124329U (en) | 2018-04-27 | 2018-04-27 | A kind of zero overflow system of thermal power plant's slag removing system pulp water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488816A (en) * | 2018-04-27 | 2018-09-04 | 西安西热水务环保有限公司 | A kind of zero overflow system of thermal power plant's slag removing system pulp water |
| CN110360583A (en) * | 2019-07-11 | 2019-10-22 | 神华（福建）能源有限责任公司 | Water immersion type scraping board slag conveyor |
-
2018
- 2018-04-27 CN CN201820620271.0U patent/CN208124329U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488816A (en) * | 2018-04-27 | 2018-09-04 | 西安西热水务环保有限公司 | A kind of zero overflow system of thermal power plant's slag removing system pulp water |
| CN110360583A (en) * | 2019-07-11 | 2019-10-22 | 神华（福建）能源有限责任公司 | Water immersion type scraping board slag conveyor |
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