CN105236145A - Feed system for dried sludge - Google Patents
Feed system for dried sludge Download PDFInfo
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- CN105236145A CN105236145A CN201510647349.9A CN201510647349A CN105236145A CN 105236145 A CN105236145 A CN 105236145A CN 201510647349 A CN201510647349 A CN 201510647349A CN 105236145 A CN105236145 A CN 105236145A
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- eductor
- ejector
- feed bin
- dewatered sludge
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Abstract
The invention relates to a feed system for dried sludge. A discharge outlet of a stock bin is connected with an inlet of a rotation feeder. An outlet of the rotation feeder is connected with a feed inlet of an ejector. An air inlet of the ejector is connected with a Roots blower through an air pipeline, so that when air is ejected out through a nozzle in the ejector at a high speed, negative pressure is formed in the inner space of the ejector. The inner negative pressure space of the ejector is connected with the upper space of the stock bin through an exhaust gas pipeline, so that pumping action is generated to the upper space of the stock bin, and accordingly exhaust gas containing dust in the upper space of the stock bin flows into the ejector. High-speed air ejected flow is mixed with the dried sludge and the exhaust gas containing the dust in the ejector, is decelerated and pressurized to the pressure needed by pneumatic conveying through a diffuser pipe in the ejector, and then flows out of an outlet of the ejector. The outlet of the ejector is connected with a boiler through a feed pipeline. According to the feed system, the feed need for sludge incineration of the boiler in a power station can be met. The feed system has the advantages of being good in air impermeability, simple and reliable in work. The dust and a bad smell can be effectively prevented from being leaked to the surroundings in the feed process of the dried sludge.
Description
Technical field
The present invention relates to a kind of waste treatment system, particularly relate to a kind of dewatered sludge conveying disposal system.
Background technology
Urban wastewater treatment firm is the main source of mud, and along with Chinese society expanding economy, sewage load and sludge yield are all increasing.According to Environmental Protection Department statistics, national urban wastewater treatment facility overall design processing capacity 1.71 billion cubic meters/day in 2014, the average day process water yield 1.35 billion cubic meter.The height of sludge yield and sewage treatment process and standard has relation, accounts for 0.3% ~ 0.5%(of the process water yield in water ratio 97%).Produce about 1 ton of dewatered sludge amount conversion by every ten thousand stere sewage, the sludge quantity that national every day in 2014 produces has reached 1.35 ten thousand tons of absolutely dry mud, amounts to the mud of about 6.75 ten thousand tons of water ratio 80%.
The flock that mud is made up of moisture, organic granular and inorganic particle etc., wherein containing plurality of heavy metal, pathogen and difficult degradation toxic organic compound, also can emitting offensive odor.If not to mud in addition actv. treatment and disposal, can serious environment pollution, affect the healthy of people.The process of mud and recycling, one of major fields becoming environmental protection.
The pretreatment of mud has the technology such as conditioning, concentrated, dehydration, stabilization and mummification, the final disposal of mud mainly contains the modes such as landfill, Land_use change, building materials utilization, biological treatment and burning, and the emerging technologies such as pyrolysis, gasification and pyrohydrolysis are also among research and development.
Mummification-incineration technology extensively adopts power plant's low pressure steam and other heating medium dewatered sludge higher to the water ratio from sewage treatment plant to heat, make moisture in mud evaporate further and obtain the dewatered sludge that water ratio is lower, calorific value is higher, then send in boiler through dewatered sludge feeding system and burn; Burn the high-temperature flue gas produced to discharge after heat recuperation and purifying treatment, thus realize reducing sludge volume, decrement and innoxious.This technology has that process load is large, processing speed is fast, the innoxious advantage such as relatively thorough, and development in recent years is rapid, obtains widespread use at home.In the partial sludge mummification-burning engineering of having gone into operation, distant between sludge drying workshop and boiler, needs the coal yard first dewatered sludge being transported to power plant to store up, and then adopts Belt Conveying mode to send into pulverized coal preparation system, or directly sends into burning in stove.Because the mud after mummification has airborne dust in stacking and course of conveying and foul smell distributes, and the sealing property of belt conveyor system is poor, so easily cause foul smell in plant area and near zone diffusion, cause work under bad environment, have a strong impact on the enthusiasm of power plant's burning sludge.Therefore for the needs of power plant's burning sludge, exploitation air-tightness is good, composition is simple, dewatered sludge feeding system that is reliable operation is very necessary.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of dewatered sludge feeding system that can meet station boiler burning sludge needs; this system Absorbable organic halogens ground conveying dewatered sludge; and effectively prevent dewatered sludge foul smell and dust recycling; overcome the deficiency of dewatered sludge delivery system in existing sludge incineration engineering, the working environment of protection plant area.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of dewatered sludge feeding system, comprise roots blower, control cock, feed bin, push-pull valve, revolution feeder, eductor, described feed bin discharge hole connects the import of revolution feeder, the outlet of revolution feeder is connected to the inlet point of eductor, and the dewatered sludge in feed bin quantitatively sends into eductor by revolution feeder; Described eductor admission port connects roots blower by air duct, when the nozzle at high speeds of air in eductor is sprayed, injector interior space forms negative pressure, injector interior negative pressure space connects feed bin upper space by blast pipe road, swabbing action is produced to the upper space of feed bin, makes the weary gas of the dust-laden of feed bin upper space flow into eductor; High-velocity jets mixes in eductor with dewatered sludge, the weary gas of dust-laden, and outflow jet outlet after the pressure that the diffuser pipe deceleration in eductor boosts to needed for Geldart-D particle, eductor outlet is connected to boiler by charging line.
Be connected with push-pull valve between described feed bin discharge hole and the import of revolution feeder, cut off the connection between feed bin and revolution feeder by push-pull valve, be convenient to overhaul of the equipments.
Control cock is serially connected with, by the vacuum magnitude in governor valve control feed bin in described blast pipe road.
The invention has the beneficial effects as follows: adopt technique scheme, when the nozzle at high speeds of roots blower outlet air in eductor sprays, injector interior space is made to form negative pressure, through blast pipe road one, blast pipe road two aspirates the weary gas of dust-laden of feed bin upper space, maintain feed bin negative pressure, prevent foul smell and dust in feed bin to be outwards leaked in environment; Injector interior space forms negative pressure, can also promote that Air Entrainment enters the dewatered sludge of eductor through revolution feeder, air and dewatered sludge are mixed, and prevents foul smell and dust from revealing through revolution feeder seal clearance; Compound outflow jet outlet after the pressure that the diffuser pipe deceleration in eductor boosts to needed for Geldart-D particle of dewatered sludge and air, the charging line through seal and pressure bearing is transported to boiler, avoids foul smell and dust to reveal.
Therefore, the novel dewatered sludge feeding system based on Geldart-D particle that the present invention proposes, the feed needs of station boiler burning sludge can be met, have that air-tightness is good, system be simple, the advantage of reliable operation, can effectively prevent dust and foul smell in dewatered sludge feeding process to be leaked in surrounding environment.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 1, at dewatered sludge feeding system of the present invention, comprise roots blower 1, blast pipe road 22, control cock 3, blast pipe road 1, feed bin 5, push-pull valve 6, revolution feeder 7, boiler 8, charging line 9, eductor 10, air duct 11.
The discharging opening of feed bin 5 is connected to push-pull valve 6, and push-pull valve 6 is connected to revolution feeder 7, and revolution feeder 7 is connected to the inlet point of eductor 10; Roots blower 1 is connected to air duct 11, and air duct 11 is connected to the air intake of eductor 10, and the outlet of eductor 10 is connected to charging line 9, and charging line 9 is connected to boiler 8; The exhausr port of feed bin 5 is connected to blast pipe road 1, and blast pipe road 1 is connected to control cock 3, and control cock 3 is connected to blast pipe road 22, and blast pipe road 22 is connected to the weary gas import of eductor 10.
The principle of work of this dewatered sludge feeding system is:
Dewatered sludge in feed bin 5, by push-pull valve 6, quantitatively sends into eductor 10 through revolution feeder 7; Roots blower 1 sucks ambient air, air after supercharging enters eductor 10 through air duct 11, when the nozzle at high speeds of air in eductor 10 sprays, eductor 10 inner space is made to form negative pressure, through blast pipe road 22, the upper space of control cock 3, the one 4 pairs of feed bins 5 in blast pipe road produces swabbing action, makes the weary gas of the dust-laden of feed bin 5 upper space flow into eductor 10; High-velocity jets mixes in eductor 10 with dewatered sludge, the weary gas of dust-laden, and after the pressure that the diffuser pipe deceleration in eductor 10 boosts to needed for Geldart-D particle, outflow jet 10 exports, and sends into boiler 8 through charging line 9.The connection between feed bin and revolution feeder 7 can be cut off by push-pull valve 6, be convenient to overhaul of the equipments.The vacuum magnitude in feed bin 5 can be controlled by control cock 3.
Native system has following characteristics:
(1) utilize the negative pressure produced in eductor 10, the weary gas of suction feed bin 5 top dust-laden, can maintain feed bin negative pressure, prevent foul smell and dust in feed bin 5 to be outwards leaked in environment;
(2) utilizing the negative pressure produced in eductor 10, foul smell and the seal clearance of dust through turning round feeder 7 can also being prevented to be leaked in environment;
(3) good airproof performance of dewatered sludge delivery duct, also can avoid foul smell and dust to reveal.
Therefore, this dewatered sludge feeding system patent achieves function that is stable, closed conveying dewatered sludge, can meet the feed needs of station boiler burning and drying mud, and is conducive to preventing foul smell and dust recycling, protection plant environment.
Claims (3)
1. a dewatered sludge feeding system, comprise roots blower (1), control cock (3), feed bin (5), push-pull valve (6), revolution feeder (7), eductor (10), it is characterized in that: described feed bin (5) discharging opening connects revolution feeder (7) import, the outlet of revolution feeder (7) is connected to the inlet point of eductor (10), and the dewatered sludge in feed bin (5) quantitatively sends into eductor (10) by revolution feeder (7); Described eductor (10) admission port connects roots blower (1) by air duct (11), when the nozzle at high speeds of air in eductor (10) is sprayed, eductor (10) inner space forms negative pressure, eductor (10) internal negative pressure space connects feed bin (5) upper space by blast pipe road, swabbing action is produced to the upper space of feed bin (5), makes the weary gas of the dust-laden of feed bin (5) upper space flow into eductor (10); High-velocity jets mixes in eductor (10) with dewatered sludge, the weary gas of dust-laden, and outflow jet (10) outlet after the pressure that the diffuser pipe deceleration in eductor (10) boosts to needed for Geldart-D particle, eductor (10) outlet is connected to boiler (8) by charging line (9).
2. dewatered sludge feeding system according to claim 1, it is characterized in that: between described feed bin (5) discharging opening and revolution feeder (7) import, be connected with push-pull valve (6), cut off the connection between feed bin (5) and revolution feeder (7) by push-pull valve (6), be convenient to overhaul of the equipments.
3. dewatered sludge feeding system according to claim 1, is characterized in that: be serially connected with control cock (3) in described blast pipe road, controls the vacuum magnitude in feed bin (5) by control cock (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510647349.9A CN105236145A (en) | 2015-10-09 | 2015-10-09 | Feed system for dried sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510647349.9A CN105236145A (en) | 2015-10-09 | 2015-10-09 | Feed system for dried sludge |
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| CN105236145A true CN105236145A (en) | 2016-01-13 |
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| CN201510647349.9A Pending CN105236145A (en) | 2015-10-09 | 2015-10-09 | Feed system for dried sludge |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106168439A (en) * | 2016-08-11 | 2016-11-30 | 爱森（中国）絮凝剂有限公司 | A kind of powder is dried induction system |
| CN106185336A (en) * | 2016-07-18 | 2016-12-07 | 上海城投污水处理有限公司 | Pneumatic ash conveying plant in a kind of sludge incineration technique and control method thereof |
| CN110294327A (en) * | 2019-07-09 | 2019-10-01 | 扬州安泰威合金硬面科技有限公司 | A kind of device for transporting objects for the processing of Co-based alloy powder coating |
| CN110793041A (en) * | 2019-09-17 | 2020-02-14 | 中国能源建设集团广东省电力设计研究院有限公司 | Sludge blending combustion system |
| CN114046518A (en) * | 2021-09-28 | 2022-02-15 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Low-calorific-value garbage smoldering treatment system and method based on coal-fired unit |
| CN115164211A (en) * | 2022-07-05 | 2022-10-11 | 安徽盛博冶金环保科技有限公司 | Energy-saving sludge drying and incinerating process and system thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106185336A (en) * | 2016-07-18 | 2016-12-07 | 上海城投污水处理有限公司 | Pneumatic ash conveying plant in a kind of sludge incineration technique and control method thereof |
| CN106185336B (en) * | 2016-07-18 | 2018-07-27 | 上海城投污水处理有限公司 | A kind of pneumatic ash conveying plant in sludge incineration technique and its control method |
| CN106168439A (en) * | 2016-08-11 | 2016-11-30 | 爱森（中国）絮凝剂有限公司 | A kind of powder is dried induction system |
| CN110294327A (en) * | 2019-07-09 | 2019-10-01 | 扬州安泰威合金硬面科技有限公司 | A kind of device for transporting objects for the processing of Co-based alloy powder coating |
| CN110793041A (en) * | 2019-09-17 | 2020-02-14 | 中国能源建设集团广东省电力设计研究院有限公司 | Sludge blending combustion system |
| CN114046518A (en) * | 2021-09-28 | 2022-02-15 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Low-calorific-value garbage smoldering treatment system and method based on coal-fired unit |
| CN115164211A (en) * | 2022-07-05 | 2022-10-11 | 安徽盛博冶金环保科技有限公司 | Energy-saving sludge drying and incinerating process and system thereof |
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Application publication date: 20160113 |
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