CN1110539C - Powder coal hot press forming technology heated by double waste gas circulating vertical pipes - Google Patents
Powder coal hot press forming technology heated by double waste gas circulating vertical pipes Download PDFInfo
- Publication number
- CN1110539C CN1110539C CN 00110793 CN00110793A CN1110539C CN 1110539 C CN1110539 C CN 1110539C CN 00110793 CN00110793 CN 00110793 CN 00110793 A CN00110793 A CN 00110793A CN 1110539 C CN1110539 C CN 1110539C
- Authority
- CN
- China
- Prior art keywords
- coal
- waste gas
- gas
- heating
- preheating
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The present invention discloses hot briquetting technology heated by double waste gas circulation and vertical pipes for powdered coal. The technology is characterized in that powdered coal drying pipes and heating pipes of four vertical pipes are connected in series into an independent powdered coal heating system with waste gas circulation; first preheating pipes and secondary preheating pipes are connected in series into the other independent powdered coal heating system with waste gas circulation. Compared with the powdered coal heating technology with single waste gas circulation, the powdered coal heating technology with double waste gas circulation can discharge waste gas without pollution, has low systemic resistance and reduces construction investment.
Description
What the present invention relates to technical field of coal chemical industry a kind ofly then ties up the hot press forming technology that temperature, moulding are produced moulded coal or formed coke, the hot-press shaping technology for powdered coal of promptly two waste gas circulation uprises heating with gas thermophore rapid heating coal dust.
Gas thermophore heating hot-press shaping technology for powdered coal is to have certain close-burning coal charge, be heated rapidly to a certain temperature section of the plasticity temperature range of this coal charge as thermophore with hot waste gas, then through the warm some minutes of dimension, the fine coal Rapid Thermal is decomposed the similar bitum plastic mass of generation and is plastic state, the hot-forming immediately moulded coal that makes.If CARBONIZATION OF BRIQUETTES is promptly got formed coke.The hot-press shaping technology for powdered coal of developing this class has, the Russia of USSR (Union of Soviet Socialist Republics), Ukraine and China, and developed into and can apply to industrial level.
Developed this class technology all is the technology that adopts single waste gas circulation uprise heating coal dust in the past.
The IGI hot-press shaping technology for powdered coal of the last exploitation of USSR (Union of Soviet Socialist Republics) is the gas thermophore rapid heating hot-press shaping technology for powdered coal that adopts four uprises of series connection.This technology be with track type tie up warm shaper will heat the back coal dust suppress moulded coal.Moulded coal becomes formed coke through the external heated shaft furnace charing.
Since nineteen fifty-seven, the exploitation course of the hot press forming technology of the gas thermophore rapid heating coal dust of China has been done specially on the hot briquetting process bar topic of " the metallurgical encyclopedia of China " coking chemical fascicle P338-342 and has been stated, at Chinese patent ZL98114008.4, " hot-press shaping technology for powdered coal " made detailed description in the hot press forming technology of four uprise rapid heating coal dusts of two and two strings.
In the technology of the uprise rapid heating coal dust of this class single loop waste gas, contain CO, the H that the coal mild heat decomposites in the unnecessary waste gas that needs to discharge
2, CH
4And other hydrocarbon gas and a small amount of vaporific tar, NH
3Deng.The calorific value of this contaminated unnecessary waste gas is very low, and with the fugitive constituent of coal charge and to add the temperature eventually of hot coal relevant, its value is 200～400kcal/Nm
3(hygrometric state) is aphlogistic, directly discharges then atmosphere pollution.This is the essential key issue that solves.
The solution of USSR (Union of Soviet Socialist Republics) is to adopt catalyticcombustion technology, needs supply coal gas and air that the combustiblematerials in the unnecessary waste gas is burnt in addition, makes it to reach emission standard.Therefore, the waste-gas cleaning workshop be need establish in addition and investment, energy consumption, process cost and production cost increased.
The hot press forming technology of the gas thermophore heating coal dust of China's exploitation, unresolved so far this difficult problem, it hampers the popularization and the development of this novel technique.
The hot press forming technology that the purpose of this invention is to provide the uprise rapid heating coal dust of a kind of pair of waste gas circulation, form the unnecessary waste gas of two portions, wherein a part of not contaminated waste gas can directly discharge, and the waste gas that another part is mixed with coal pyrolysis gas becomes fuel gas with low heat value.
Technology contents of the present invention is described in down:
The hot-press shaping technology for powdered coal of two waste gas circulation uprise heating, it is that coal dust is through coal bunker, screw feeder, drying tube, cyclonic separator, 1 grade of preheating tube, cyclonic separator, 2 grades of preheating tubes, cyclonic separator, the rapid heating pipe, cyclonic separator, temperature-keeping machine, pair roller ball press compacting moulded coal, through stewing jar of stewing hot press forming technology of heat of heat, it is characterized in that: with coal dust drying tube and the heating tube in four uprises, be connected into the fine coal heating system of an independent waste gas circulation, 1 grade of preheating tube and 2 grades of preheating tubes are connected into the fine coal heating system of another independent waste gas circulation.
It is compared with the technology of in the past single waste gas circulation uprise heating coal dust, in the identical hot coal amount that adds with similarly under the ature of coal condition, discharges unnecessary waste gas total amount and is more or less the same.Different is that this technology is that the unnecessary waste gas that need are discharged is divided into two portions: the waste gas (account for 40～50%) of first part for being polluted by the pyrolysis of coal thing, the waste gas (accounting for 60～50%) that another part pollutes for no pyrolysis of coal thing.Obviously, the pyrolyzate of coal is enriched in the unnecessary waste gas of first part, thus its calorific value corresponding double many.Contain a large amount of water vapors in this part 100～130 ℃ of unnecessary waste gas, again through be cooled to indirectly 40～45 ℃ with waste gas in the supersaturation water vapor condensation discharge, make unnecessary exhaust gas volume reduce 40%, thereby make its calorific value improve 50～60% again.In this technology, the coal charge of use should meet the ature of coal requirement of caking index G 〉=20 or thickness of colloidal matter layer y 〉=5mm.The high heating value gas that mixes the stewing process acquisition of Wei Wen and pattern of fever coal heat in unnecessary waste gas makes it to become low-heat value gas and discharges as the combustion gas use or for the burning back.
In addition, the fine coal heating process of two waste gas circulation is compared with the fine coal heating process of single waste gas circulation, and systemic resistance is little also to be an advantage, can reduce construction investment.
Fig. 1 is the hot-press shaping technology for powdered coal schema of two waste gas circulation uprise heating.
Be described in detail embodiment below in conjunction with process flow sheet.
As shown in Figure 1, technology of the present invention is that coal dust is suppressed moulded coals, boiled in a covered pot over a slow fire jar stewing hot press forming technologies of 19 heat through heat through coal bunker 13, screw feeder 14, drying tube 1,5,1 grade of preheating tube 2 of cyclonic separator, 6,2 grades of preheating tubes 3 of cyclonic separator, cyclonic separator 7, rapid heating pipe 4, cyclonic separator 8, temperature-keeping machine 15, pair roller ball press 16.With coal dust drying tube 1 in four uprises and heating tube 4, be connected into the fine coal heating system of an independent waste gas circulation, 1 grade of preheating tube 2 and 2 grades of preheating tubes 3 are connected into the fine coal heating system of another independent waste gas circulation.
In 1 grade of preheating tube 2 and 2 grades of preheating tube 3 heating systems, the thermal source of preheating coal dust is a coal gas.Coal gas is sent into roasting kiln 17 with air and is burnt into high-temp waste gas, be transferred to 550～650 ℃ through intrasystem cycle gas, waste gas enters 2 grades of preheating tubes 3 as the gas thermophore, the coal dust of sending in the pipe by after 1 grade of preheating tube preheating is carried out the preheating of secondary current-carrying, and pre-hot coal temperature control is hanged down 20～40 ℃ at the softening temperature than coal charge.This part not the pre-hot coal of pyrolytic after cyclonic separator 7 separates,, send into heating tube 4 by grid lock gas feeding machine 9.The hot waste gas of cyclonic separator 7 outlets enters 1 grade of preheating tube 2, with send into the pipe in coal dust through preheating tube 2 after cyclonic separator 6, separate and send into 2 grades of preheating tubes 3 by the pre-hot coal of grid lock gas feeding machine 9, the fine breeze that the waste gas of its outlet is taken out of separates through cyclonic separator 10, and also enters coal dust heating tube 4 through grid lock gas feeding machine 9.After the waste gas of cyclonic separator 10 outlet enters indirect cooler 12 and is cooled to 100～150 ℃, suction waste gas circulation blower fan 20, most of waste gas is sent into roasting kiln 17 through pipe a and is removed heatrejection; Another part is intrasystem unnecessary waste gas, because of the thermal decomposition material that does not wherein have coal is sent into smoke stack emission through pipe A.
In coal dust drying tube 1 and heating tube 4 systems, the thermal source of heating and dry coal dust also is a coal gas.Coal gas is sent into roasting kiln 18 with air and is burnt into high-temp waste gas, be transferred to 550～600 ℃ waste gas through intrasystem cycle gas, enter heating tube 4 as the gas thermophore, with the pre-hot coal current-carrying heating of sending in the pipe, coal dust temperature after the rapid heating is 430～460 ℃, and the thermolysis of existing coal goes out first tar gas and inflammable gas is sneaked in the hot waste gas.The coal dust that is heated to whole temperature separates by grid lock gas discharge machine 9 at cyclonic separator 8 sends into temperature-keeping machine 15, enter pair roller ball press 16 after 1～4 minute and be pressed into moulded coal and send into stewing jar 19 of heat continuously through tieing up temperature, stewing 2～4 hours of heat, after the discharge, cooling promptly get moulded coal.Send into the charring furnace charing as moulded coal and promptly get formed coke.The hot waste gas of cyclonic separator 8 outlets is then sent into coal dust drying tube 1 as thermal source, and the wet coal rapid drying with screw-type coal distributor 14 is sent into separates moisture-free coal through cyclonic separator 5 and 11, sends into 1 grade of preheating tube 2 through grid lock gas discharge machine 9.The waste gas suction waste gas circulation blower fan 22 that cyclonic separator 11 comes out, major part is gone into roasting kiln 18 temperature adjustments as cycle gas through the b pipe and is finished waste gas circulation.The unnecessary waste gas of another part is sent through water cooler 21 and B pipe.
Because coal dust heating tube 4 is that coal dust is heated to the plasticity temperature range, be higher than its softening temperature, coal dust has begun fierce thermolysis, there are a considerable amount of pyrolysis coal gas and first tar gas to sneak in the waste gas, in coal dust drying tube 1 because the spent air temperture rapid drawdown, just the tar gas tar fog major part of congealing into is captured and removes by coal dust and coal dust, makes the coal-tar middle oil mist content of cycle gas drop to the degree that the operation of system is not caused harm.But the CH that contains inflammable gas in the waste gas by pipe B discharge
4, H
2, CO, NH
3Pollutents such as hydrocarbon gas and a small amount of tar fog can not directly discharge.
Under the ature of coal of the using coal condition identical with quantity, with regard to unnecessary exhausted air quantity in the technological process, the fine coal heating process of the promptly two waste gas circulation of the fine coal heating process of single waste gas circulation and this technology is suitable basically, different is: the unnecessary exhausted air quantity of the fine coal heating process of single waste gas circulation is all contaminated and calorific value is low, and the processing costs that reach the mark discharging is quite big.This technology then is divided into two portions with unnecessary waste gas total amount: the pollution of a part of essentially no pyrolysis of coal product, and the unnecessary exhausted air quantity enrichment of another part (＜50%) pyrolysis product of coal in wherein, its calorific value is exceeded more than one times, that just is easy to handle.
The technical measures of the unnecessary waste gas of this art breading are: will be entered 100～130 ℃ of unnecessary waste gas of pipeline B by blower fan 22, be cooled to 40～45 ℃ through indirect cooler 21, make the supersaturation water vapor condensation Cheng Shui in the waste gas, and make exhausted air quantity reduce 35～40%, make the calorific value of waste gas improve about 60% again.Still do not reach combustion requirements as after treatment waste gas calorific value, then will tie up warm coal gas (5500～6000kcal/Nm by the high heating value that pipeline C derives
3) or the dimension temperature coal gas after purifying mix wherein, improve its calorific value and make and become low-heat value gas.
Claims (3)
1. the hot-press shaping technology for powdered coal of two waste gas circulation uprise heating, it is that coal dust is through coal bunker (13), screw feeder (14), drying tube (1), cyclonic separator (5), 1 grade of preheating tube (2), cyclonic separator (6), 2 grades of preheating tubes (3), cyclonic separator (7), rapid heating pipe (4), cyclonic separator (8), temperature-keeping machine (15), pair roller ball press (16) compacting moulded coal, the hot press forming technology of heat stewing jar (19), it is characterized in that: with coal dust drying tube (1) in four uprises and heating tube (4), be connected into the fine coal heating system of an independent waste gas circulation, 1 grade of preheating tube (2) and 2 grades of preheating tubes (3) are connected into the fine coal heating system of another independent waste gas circulation.
2. the hot-press shaping technology for powdered coal of according to claim 1 pair of waste gas circulation uprise heating, it is characterized in that: in 1 grade of preheating tube (2) and 2 grades of preheating tubes (3) heating system, the thermal source of preheating coal dust is a coal gas; Coal gas is sent into roasting kiln (17) with air and is burnt into high-temp waste gas, be transferred to 550～650 ℃ through intrasystem cycle gas, waste gas enters 2 grades of preheating tubes (3) as the gas thermophore, the coal dust of sending in the pipe by after 1 grade of preheating tube (2) preheating is carried out the preheating of secondary current-carrying, and pre-hot coal temperature control is hanged down 20～40 ℃ at the softening temperature than coal charge; This part not the pre-hot coal of pyrolytic after cyclonic separator (7) separates,, send into heating tube (4) by grid lock gas feeding machine (9); The hot waste gas of cyclonic separator (7) outlet enters 1 grade of preheating tube (2), with send into the pipe in coal dust through preheating tube (2) after cyclonic separator (6), separate and send into 2 grades of preheating tubes (3) by the pre-hot coal of grid lock gas feeding machine (9), the fine breeze that the waste gas of its outlet is taken out of separates through cyclonic separator (10), and also enter coal dust heating tube (4) through grid lock gas feeding machine (9), the waste gas of cyclonic separator (10) outlet enters indirect cooler (12), after being cooled to 100～150 ℃, suction waste gas circulation blower fan (20), most of waste gas is sent into roasting kiln (17) through pipe a and is removed heatrejection; Another part is intrasystem unnecessary waste gas, because of the thermal decomposition material that does not wherein have coal is sent into smoke stack emission through pipe A.
3. the hot-press shaping technology for powdered coal of according to claim 1 pair of waste gas circulation uprise heating is characterized in that: in coal dust drying tube (1) and heating tube (4) system, the thermal source of heating and dry coal dust also is a coal gas; Coal gas is sent into roasting kiln (18) with air and is burnt into high-temp waste gas, be transferred to 550～600 ℃ waste gas through intrasystem cycle gas, enter heating tube (4) as the gas thermophore, with the pre-hot coal current-carrying heating of sending in the pipe, coal dust temperature after the rapid heating is 430～460 ℃, and the thermolysis of existing coal goes out first tar gas and inflammable gas is sneaked in the hot waste gas; The coal dust that is heated to whole temperature separates by grid lock gas discharge machine (9) at cyclonic separator (8) sends into temperature-keeping machine (15), enter pair roller ball press (16) after 1～4 minute and be pressed into moulded coal and send into heat stewing jar (19) continuously through tieing up temperature, stewing 2～4 hours of heat, after the discharge, cooling promptly get moulded coal; The hot waste gas of cyclonic separator (8) outlet is then sent into coal dust drying tube (1) as thermal source, the wet coal rapid drying that screw-type coal distributor (14) is sent into, through cyclonic separator (5) and (11) moisture-free coal is separated, send into 1 grade of preheating tube (2) through grid lock gas discharge machine (9); The waste gas suction waste gas circulation blower fan (22) that cyclonic separator (11) comes out, major part is gone into roasting kiln (18) temperature adjustment as cycle gas through the b pipe and is finished waste gas circulation; The unnecessary waste gas of another part is sent through water cooler (21) and B pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110793 CN1110539C (en) | 2000-08-18 | 2000-08-18 | Powder coal hot press forming technology heated by double waste gas circulating vertical pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00110793 CN1110539C (en) | 2000-08-18 | 2000-08-18 | Powder coal hot press forming technology heated by double waste gas circulating vertical pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1339555A CN1339555A (en) | 2002-03-13 |
| CN1110539C true CN1110539C (en) | 2003-06-04 |
Family
ID=4580761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00110793 Expired - Fee Related CN1110539C (en) | 2000-08-18 | 2000-08-18 | Powder coal hot press forming technology heated by double waste gas circulating vertical pipes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1110539C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102229831B (en) * | 2011-04-21 | 2014-04-02 | 李功民 | Pulverized lignite thermal forming method and device |
| CN113201360B (en) * | 2021-04-16 | 2022-05-17 | 王利斌 | System and method for co-production oil extraction of pulverized coal hot-pressing blocks |
-
2000
- 2000-08-18 CN CN 00110793 patent/CN1110539C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1339555A (en) | 2002-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104560071B (en) | Pyrolysis system and method for pyrolysis | |
| CN204265698U (en) | A kind of biomass charing device | |
| WO2012022059A1 (en) | Apparatus for pyrolysis of coal substance | |
| CN104560072B (en) | Thermal decomposition of organic wastes system and method for pyrolysis | |
| CN101880540A (en) | Low-coalification degree pulverized coal pyrolysis method and product prepared through the same | |
| CN101100607B (en) | Coking technique using coal external burning to replace gas fuel burning | |
| CN102732274A (en) | Brown coal dry-distillation method using coal hot air furnace to supply heat | |
| CN101289621B (en) | Process for preparing carbocoal, coke tar and coal gas by treating bovey coal by suspending pyrogenation device | |
| WO2012022061A1 (en) | Vertical pyrolysis equipment for coal substance | |
| WO2012022058A1 (en) | Decomposition equipment with single burner for coal substance | |
| CN101289622B (en) | Process for upgrading of bovey coal by solid thermal-loading suspending pyrogenation device of bovey coal | |
| CN108675588A (en) | Sludge high-drying charing process system | |
| CN205328941U (en) | Pyrolysis equipment | |
| CN105713629A (en) | Powdered coal pyrolysis method adopting steam thermal coupling | |
| CN208667448U (en) | Sludge high-drying charing process system | |
| CN102964884B (en) | Hot cracking method process for preparing carbon black by using co-production of tail gas | |
| CN105199757B (en) | Pyrolysis system and method based on high-moisture organic waste | |
| CN101712882A (en) | Heat exchange structure used for coal drying treatment | |
| CN203212526U (en) | Heat accumulating type combined heat-carrying biomass charcoal gas-oil co-production pyrolysis system | |
| CN1110539C (en) | Powder coal hot press forming technology heated by double waste gas circulating vertical pipes | |
| CN102492445A (en) | Multi-pipe revolving low-temperature dry distillation technology of fine coal | |
| CN102504850B (en) | Oil sand solid hot carrier low-temperature dry distillation process | |
| CN204644266U (en) | The full circulation carbonization furnace that a kind of destructive distillation is lower-grade metamorphic bituminous | |
| CN204897829U (en) | Cogeneration system of coal gas, tar and active carbon | |
| CN201520746U (en) | External-combustion internal-heating-type coal dry distillation furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |