CN1147674C - Method of treating dangerous waste by utilizing cement rotary kiln - Google Patents
Method of treating dangerous waste by utilizing cement rotary kilnInfo
- Publication number
- CN1147674C CN1147674C CNB001116401A CN00111640A CN1147674C CN 1147674 C CN1147674 C CN 1147674C CN B001116401 A CNB001116401 A CN B001116401A CN 00111640 A CN00111640 A CN 00111640A CN 1147674 C CN1147674 C CN 1147674C
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- kiln
- dangerous waste
- waste
- solid
- cement
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Abstract
The present invention provides a simple and reasonable method by using a rotary cement kiln to process liquid dangerous waste materials, solid dangerous waste materials and semi-solid dangerous waste objects. The liquid dangerous waste objects are mainly conveyed by a pump, and are sprayed into a cement kiln for incineration from a kiln head. The solid dangerous waste materials are respectively used as raw materials and fuel according to the sizes of heat value, and are sent to the cement kiln for incineration from a kiln tail and the kiln head. The semi-solid dangerous waste materials are packaged in a container, and are sprayed to the predetermined zone in the cement kiln for incineration by a special waste material conveying device. A dangerous waste material processing system can possibly simple and reasonable under the precondition of ensuring safety by using the method of the present invention.
Description
Technical field
The present invention relates to utilize cement rotary kiln to handle the method for hazardous waste.
Background technology
So-called hazardous waste is meant the rules according to the same regulation of country, differentiate assert have character such as toxicity, inflammability, explosion hazard, corrosivity, carrying out property of chemical reaction, can cause dangerous refuse to health and environment.
The reasonable processing of hazardous waste is to protecting environment, preventing to pollute and promote the well-being of mankind to be extremely important.In China, the main methods to hazardous waste has at present:
1. as the fuel of township enterprise's firing brick-and tile etc.
2. send into the incinerator burning disposal, these incinerators are small-sized mostly, and have backward in technique, the poor management and the high phenomenon of charging.
3. locate on-site incineration or landfill at seabeach, wilderness etc.
Above-mentioned various processing modes not only can not be accomplished the hazardous waste processing requirements of " minimizing, resource, innoxious ", and tend to environment is caused secondary pollution.
External industrialized country begins to adopt cement rotary kiln to handle industrial dangerous waste from the seventies.Utilize cement rotary kiln burning disposal hazardous waste to have following advantage:
1) incineration temperature height in the kiln, the maximum temperature of clinkering zone can reach 1600-1700 ℃, thereby guarantees that the refuse rate of destroying by fire reaches more than 99.99%;
2) material is long at kiln residence time, and the sufficient burning time is arranged;
3) disorderly degree height in the kiln, oxygen supply is abundant, thereby most hazardous waste can thoroughly be degraded in kiln;
4) burning the ashes that produced will discharge with cement products, can accomplish zero emission; And
5) in burning process, the contained calorific value of refuse will be fully utilized alternative partial fuel coal, energy savings.
The hazardous waste that can utilize cement rotary kiln to handle derives from all trades and professions such as chemical industry, pharmacy, automobile, machinery, can be divided into liquid state, solid-state and semisolid by physical aspect.Liquid waste comprises organic solution, non-halogenated solvent etc.; Solid waste comprises mud, dyestuff, glass, pottery etc.; The semisolid refuse comprises mineral waste oil, resin or viscose thing etc.Hazardous waste to different shape has different processing methods.
When carrying, liquid waste can be carried with pump, and solid waste can be carried with traditional solid material conveying machinery (as elevator, conveyer belt, stuff-spraying pipe etc.).The semisolid refuse then can not be carried with above way.Because double solid waste lacks special conveying equipment, thereby can not effectively handle this type of refuse in cement rotary kiln.
In addition, utilize cement rotary kiln to handle the technology of hazardous waste in the past and equipment is often comparatively complicated, and do not utilize the equipment on the original cement producing line well.
Summary of the invention
In view of above shortcoming, the objective of the invention is to, respectively at solid-state, liquid and semi-solid hazardous waste, simple, the reasonable method of utilizing cement rotary kiln to handle are proposed.
For achieving the above object, a first aspect of the present invention is, a kind of method of utilizing cement rotary kiln to handle liquid hazardous waste is provided, and this method comprises the steps: a) liquid hazardous waste to be sent into lautertuns; B) with first pumping installations waste liquid being sent into the surge-tank that agitating device is housed allocates; C) with second pumping installations deployed waste liquid being sent into storage tank stores to certain amount; And d) with the 3rd pumping installations waste liquid is pressurizeed, make it after the atomizing nozzle atomizing, to send into cement rotary kiln from kiln hood and burn.
Preferably, described first, second pumping installations is a centrifugal pump, and described the 3rd pumping installations is a displacement pump.
Preferably, described atomizing nozzle is arranged in the coal powder injection pipe of cement producing line.
By method of the present invention, can liquid state, solid-state and semi-solid hazardous waste be sent into cement rotary kiln and handle with safety, simple, rational technological process.Various hazardous wastes are thoroughly degraded, and burn the ashes that produced and to discharge with cement products, can accomplish zero emission.In addition, the contained calorific value of refuse can be fully utilized, thereby plays the effect of energy savings.
Therefore, adopt method of the present invention, utilize cement rotary kiln to handle hazardous waste, can reach the hazardous waste processing requirements of " minimizing, resource, innoxious " basically.
Description of drawings
Purpose of the present invention, advantage and feature will become clearer by the preferred embodiment of describing below in conjunction with accompanying drawing.In the accompanying drawing:
Fig. 1 is the schematic diagram of liquid hazardous waste processing technological flow;
Fig. 2 is the schematic diagram of an embodiment of solid-state hazardous waste processing technological flow;
Fig. 3 is the schematic diagram of another embodiment of solid-state hazardous waste processing technological flow; And
Fig. 4 one is particularly suitable for handling the schematic diagram of the conveying device of semisolid hazardous waste.
The specific embodiment
The processing technological flow of liquid hazardous waste is described below in conjunction with Fig. 1.In general, Ye Tai hazardous waste can alternative fuel burning in cement kiln.
As shown in Figure 1, utilize safe tank car 1 that liquid hazardous waste is transported to suitable place, be discharged into lautertuns 2.With centrifugal pump 3 waste liquid is sent into the surge-tank 4 that agitating device is housed, the waste liquid of different cultivars is allocated.
Above-mentioned adaptation step liquid towards, solid-state and semi-solid refuse all are necessary.This handles hazardous waste because of cement kiln is to carry out in cement production process, thereby the refuse that the water inlet stall is handled is selectively, and not all refuse can both be handled in cement kiln.The refuse that the stall of intaking is handled must satisfy following requirement: the ordinary production that 1) can not influence cement kiln; 2) can not influence the quality of cement products; 3) can not cause damage to production equipment; 4) in processing procedure, can not work the mischief and influence plant environment operator's health.
Under present condition, through test, the applicant has proposed following requirement to the waste material (comprising liquid state, solid-state and semisolid) that enters factory: 1) "dead"; 2) no severe corrosive; 3) content of beary metal＜3000ppm; 4) moisture＜20%; 5) chlorinty＜3%; 6) calorific value that acts as a fuel 〉=4000 kcal/kg.Can do suitable adjustment according to what and physical aspect of refuse amount different at back 3 in the above condition.After possessing better allotment and preliminary treatment facility, can revise these three indexs according to the refuse situation of originating.
After allotment, with centrifugal pump 5 deployed waste liquid is sent into storage tank 6 and store.After a certain amount of, with the waste liquid pressurization, after atomizing nozzle 8 atomizings, send into cement rotary kiln 9 from kiln hood and burn with displacement pump 7.Though not expression among the figure, in this embodiment, jet pipe 8 is installed in the coal powder injection pipe of former cement producing line.Waste liquid jet pipe hydrojet and the coal powder injection of coal powder injection pipe can be carried out simultaneously.
Adopt above-mentioned technological process, test with a kind of fluorine-containing isopropyl alcohol waste liquid, the result is as follows:
| Use before the waste liquid | Use after the waste liquid | |
| Kiln output (ton/hour) | 43.7 | 43.7 |
| Kiln speed (rpm) | 2.3 | 2.3 |
| The waste liquid straying quatity (ton/hour) | 0 | 1 |
| Subtract coal amount (ton/hour) | 0 | 1.2 |
From last table, can see, utilize cement rotary kiln that fluorine-containing isopropyl alcohol waste liquid is handled, not only manufacture of cement be had no effect, and can reduce firing rate.In addition, according to detection, after mixing the fluorine-containing isopropyl alcohol waste liquid of burning, the pernicious gas of cement rotary kiln is (as ∑ F, Cl
2, H
2S, NO
2And HCl) discharge capacity does not rise counter falling, and does not have the secondary pollution problem to atmosphere.Moreover, mix burn fluorine-containing isopropyl alcohol waste liquid to cement quality also without any influence, can make its 28 days compression strength improve 5-6Mpa on the contrary.
An embodiment of solid-state hazardous waste processing technological flow is described below in conjunction with Fig. 2.In this embodiment, solid-state hazardous waste (as useless calcirm-fluoride, useless oil-containing diatomite) is handled in cement rotary kiln as raw material supplying, the calorific value of these refuses is lower, is difficult to or the burning that at all can not act as a fuel.
As shown in Figure 2, truck 11 is delivered to suitable place with solid-state hazardous waste, sends into raw mill 13 through belt conveyer 12.Solid waste mixes with raw material (main component is lime stone, iron powder etc.) in grinding machine, under the acting in conjunction of advancing to grind hot blast (t=380 ℃) and grinding machine, with drying materials and levigate.Subsequently, powder concentrator 14 utilizes and selects the powder principle, granularity is met the requirements of qualified fine powder select.Then, utilize cyclone separator 15 to carry out gas one solid separation.The material of separating is sent into homogenizing storehouse 18 by air conveyer flume 16 and bucket elevator 17 and is carried out matter homogenizing.Material after the homogenizing enters the pre-heating system of being made up of four cyclone preheaters 19 by the induction system of being made up of skewed slot and elevator and carries out preheating, enters cement rotary kiln 9 from the kiln tail at last and burns.
Another embodiment of solid-state hazardous waste processing technological flow is described below in conjunction with Fig. 3.In this embodiment, solid-state hazardous waste acted as a fuel to supply in the cement rotary kiln handle, the calorific value of these solid wastes is higher, can replace the fuel of cement kiln.
As shown in Figure 3, truck 11 is transported to suitable place with solid waste, is discharged into melt pit 22.By grab bucket 23 refuse delivered to refuse storehouse 24, take out with fire coal through quantitative lock feeding device (or claiming rotary pocket feeder) 25 and mix.With high-pressure blast mixed material is sent into grinding machine 26 and carry out grinding.Material after levigate enters feed bin 28 with air-flow and carries out gas one solid separation.Material enters measuring chute 29 through lock wind lattice wheel 27 and measures, and mixes with the high-pressure blast of being sent here by high pressure positive blower 32 through conveying worm 30, lock wind lattice wheel 31 then, after stuff-spraying pipe 33 sprays into cement rotary kiln 9 from kiln hood burns.
Adopt the method for this embodiment, test with useless styrene-butadiene latex and oil-containing diatomite.The result shows that they can partly replace fire coal, and to the not influence of operation of kiln, exhaust emissions is lower than required standard, and to cement quality also not influence.
To can not the invention provides a kind of special conveying device with the semisolid hazardous waste of liquid conveying machinery conveying again with solid conveying machinery.Below in conjunction with Fig. 4 this structure and the operation principle that is particularly suitable for handling the conveying device of semisolid hazardous waste described.
As shown in Figure 4, the profile of this hazardous waste conveying device 50 and function class are similar to the artillery on the battlefield, because it is to be specifically designed to hazardous waste is launched into the cement rotary kiln, for simplicity, we will be referred to as " kiln big gun " hereinafter, and its each building block is also represented with corresponding title.
Kiln big gun 50 comprises: barrel 41 is used to store Compressed Gas; One is connected in the gun tube 46 of barrel 41 by flash device 42, is formed with bore 44 in this gun tube, also is provided with a charging door 49 and that is used to load hazardous waste and is used to breechblock (cylinder) 45 that charging door is opened or closed on gun tube; One is used to support the gun carriage 47 of described barrel and gun tube; An and control device 48 of forming by several ecp elements.
When needs are handled semi-solid hazardous waste, waste material is packaged into " shell " with container (for example plastic bottle or woven bag) earlier.With the kilneye of kiln big gun 50 aligning cement rotary kilns, by control device 48 compressed air is sent into barrel 41, make charging door 49 open and close and finish the action that shell loads by electropneumatic breechblock 45.During emission, by solenoid directional control valve, flash device 42 is jerked, the compressed air that is stored in the barrel 41 erupted in moment, after current-collecting device 43 lines, entered bore 44.Compressed-air actuated compression can be converted into the kinetic energy of shell, makes shell fly away from gun tube 46 with very big initial velocity, flies to the setting regions (from kilneye 15-20 rice) in the cement rotary kiln, and is burned there.
The content of above-mentioned relevant " kiln big gun " has proposed the application of utility model patent in addition to Patent Office of the People's Republic of China, this application is entitled as " hazardous waste conveying device ", and the applying date is on January 31st, 2000, and its content can be quoted at this for your guidance.
Adopt this method, test with semi-solid xylene distillation residue.The result shows, adopts above-mentioned kiln big gun 50, can exactly waste material be transmitted into the zone from kilneye 15-20 rice.Because this zone belongs to the clinkering zone of cement rotary kiln, its temperature the highest (can reach more than 1500 ℃), thereby can make the rate of destroying by fire of refuse reach 99.99%.Test shows, in cement kiln this semisolid refuse is not handled and can any influence be arranged to Cement Production, quality, also can not increase the discharging of harmful tail gas, and can reduce firing rate.
Certainly, if desired, also can handle solid-state and hazardous waste liquid state with kiln big gun 50.If form is suitable, even do not need container, can directly hazardous waste be sent as shell.
Though above invention has been described in conjunction with several preferred embodiments, should be appreciated that, those skilled in the art that still can make the conversion of all equivalences on the basis of not departing from essence of the present invention.For example, the waste material of various forms can be simultaneously, in cement kiln, handled abreast.Therefore, protection scope of the present invention should be limited by appended claims.
Claims (3)
1. a method of utilizing cement rotary kiln to handle liquid hazardous waste is characterized in that, this method comprises the steps:
A) liquid hazardous waste is sent into lautertuns (2);
B) with one first pumping installations (3) waste liquid being sent into the surge-tank (4) that agitating device is housed allocates;
C) with one second pumping installations (5) deployed waste liquid being sent into storage tank (6) stores to certain amount; And
D) with one the 3rd pumping installations (7) waste liquid is pressurizeed, make it after atomizing nozzle (8) atomizing, to send into a cement rotary kiln (9) from kiln hood and burn.
2. the method for claim 1 is characterized in that, described first, second pumping installations (3,5) is a centrifugal pump, and described the 3rd pumping installations (7) is a displacement pump.
3. the method for claim 1 is characterized in that, described atomizing nozzle (8) is arranged in the coal powder injection pipe of cement producing line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001116401A CN1147674C (en) | 2000-01-31 | 2000-01-31 | Method of treating dangerous waste by utilizing cement rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001116401A CN1147674C (en) | 2000-01-31 | 2000-01-31 | Method of treating dangerous waste by utilizing cement rotary kiln |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031434797A Division CN1194193C (en) | 2000-01-31 | 2000-01-31 | Method for treating dangerous wastes by utilizing cement rotary kiln |
| CNB031272339A Division CN1194192C (en) | 2000-01-31 | 2000-01-31 | Method for treating dangerous wastes by using cement rotary kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1259638A CN1259638A (en) | 2000-07-12 |
| CN1147674C true CN1147674C (en) | 2004-04-28 |
Family
ID=4581548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001116401A Expired - Fee Related CN1147674C (en) | 2000-01-31 | 2000-01-31 | Method of treating dangerous waste by utilizing cement rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1147674C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328186C (en) * | 2005-07-28 | 2007-07-25 | 北京红树林环保技术工程有限责任公司 | New processing method for indusrial toxic harmful waste liquid |
| CN102718422B (en) * | 2012-06-09 | 2014-01-08 | 安徽海螺建材设计研究院 | Chemical waste liquid disposal system |
| CN103265190B (en) * | 2013-05-04 | 2016-03-23 | 滕州市东郭水泥有限公司 | Utilize cement mill JT kiln process waste water and waste liquid Processes and apparatus |
| CN105478451A (en) * | 2016-01-15 | 2016-04-13 | 浙江环立环保科技有限公司 | Industrial dangerous waste treating system and method |
| CN107030090A (en) * | 2017-04-20 | 2017-08-11 | 金圆水泥股份有限公司 | A kind of hazardous waste compatibility and its method of disposal suitable for cement kiln synergic processing |
| CN111847717A (en) * | 2020-07-22 | 2020-10-30 | 长沙紫宸科技开发有限公司 | Method for cooperatively treating organic hazardous waste liquid by using cement kiln |
| CN111908812B (en) * | 2020-08-28 | 2022-04-22 | 重庆立洋环保科技发展有限公司 | Pretreatment method of semi-solid hazardous waste |
| CN112923369B (en) * | 2021-02-04 | 2024-03-12 | 上海电气集团股份有限公司 | Method and device for cooperatively disposing dangerous waste by cement kiln |
-
2000
- 2000-01-31 CN CNB001116401A patent/CN1147674C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1259638A (en) | 2000-07-12 |
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