CN107400527A - A kind of pre- hot coal stacking coke production technique - Google Patents

A kind of pre- hot coal stacking coke production technique Download PDF

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Publication number
CN107400527A
CN107400527A CN201710608272.3A CN201710608272A CN107400527A CN 107400527 A CN107400527 A CN 107400527A CN 201710608272 A CN201710608272 A CN 201710608272A CN 107400527 A CN107400527 A CN 107400527A
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coal
coke
stacking
hot
production technique
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姚润生
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Shanxi Bojiahui Technology Co., Ltd.
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姚润生
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B53/00Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
    • C10B53/04Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10BDESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00Other processes not covered before; Features of destructive distillation processes in general

Abstract

The present invention relates to a kind of pre- hot coal stacking coke production technique, comprise the following steps:Pretreatment:It after blends preheating and crushing, will be weighed according to coal property by blending ratio and crush coal charge addition accordingly or be mixed to get feed coal after not adding binding agent;Shaping:Moulded coal is obtained by feed coal is hot-forming;Stacking:Moulded coal stacking is attached to vertical coke oven into coal wall and side;Coking:The destructive distillation in vertical coke oven;Quenching:Coke is pushed into coke quenching cart, sieves, store after quenching, coal-gas recovering caused by destructive distillation is handled.Technical scheme effectively improves the viscosity of coal by coal preheating so that the dosage of weak caking coal can bring up to more than 45%, and improve its density using thermoforming technology, and coking time can be greatly shortened;Destructive distillation initial temperature is effectively improved to the pre- heat energy of as-fired coal progress, reduction coking chemical waste water generates and improves gas quality;By being reclaimed to caused gas heat, the effect of energy-saving and environmental protection is realized.

Description

A kind of pre- hot coal stacking coke production technique
Technical field
The invention belongs to coal coking technical field, and in particular to a kind of pre- hot coal stacking coke production technique.
Background technology
Coke be in bituminous coal under conditions of air is completely cut off, certain temperature is heated to, by drying, pyrolysis, melting, viscous What the stages such as knot, solidification, contraction were finally made, this process is high-temperature coking (high-temperature retorting).Jiao obtained by high-temperature coking Charcoal can be used for blast furnace process, casting and gasification.Coke-stove gas in process of coking after caused recovered, purification is both high heating value Fuel, be the important organic synthesis raw material of industry again.Coke is mainly used in blast furnace ironmaking and for copper, lead, zinc, titanium, antimony, mercury Deng the blast furnace smelting of non-ferrous metal, reducing agent, exothermic mixture and stock column skeleton function are played.
Coal resources in China is very abundant, but passes through geological prospecting, and the reserves of coking coal only account for gross reserves 36.78%, wherein can the coking coal reserves of independent coking there was only 6.21%.In addition, coal source and coal are distributed not in national each province , some particularly southern regional coal reserves of some provinces and regions are seldom, and mainly mill coal.Therefore how significantly to expand non- The utilization of coking coal, it is the important topic of current China's coking industry development.In addition to blast furnace ironmaking needs a large amount of coke, other Coke required for industry is quite a few, and such as Foundry Coke, gasification is burnt, electric Jiao etc..Cupola coke is the main of furnace cupola molten iron Fuel, for melting batch, and overheats molten iron, also plays support stock column, keeps good gas permeability and for the effect such as charcoal.
China Coke industry is grown along with steel industry Growth Development, and its coal utilization technology and coking technique technology can be rated as It is world-class.Existing coke production technique is there is resource restriction, environmental pollution, the problems such as especially operating environment is severe, The exploitation of 21 century coke production technique has two great development directions, is concentrated mainly on the effective of weakly caking coal and utilizes and enhancement of environment, drop In terms of low energy consumption.Correspondingly, many New Coke-making Technologies are developed, " the jumbo Coking reaction of such as European coking worker exploitation SCOPE21 techniques that the single hole coking system of device one ", Japan develop etc..It is world's coking to develop new coke production technology The problem that industry faces.
To expand coking coal as raw material, by specifically preheating coal blending process, hot extrusion molding, certain size is fabricated with Coke is made by charing with the shaped coal of intensity, is an important method for expanding coking coal source.Both can use jet coal, The coal cokings such as anthracite, not cohesive, weakly caking coal chlorine adding ratio can also be expanded.Existing coke production technique, usually using money Source some strong caking coals in short supply, production efficiency is relatively low, the thermal efficiency is poor.Meanwhile also gas leak pollution environment etc. is asked Topic.Therefore, new coking process is developed thoroughly to innovate current technology.
Publication No. CN1923956A patent application discloses a kind of pretreatment technology of coking mixing coal, and specifically discloses Step:A certain amount of anthracitic coking mixing coal will be incorporated to be mixed evenly with water, another side heating is while be stirred to Predetermined moisture content, that is, coking mixing coal is subjected to bubble, boiling, drying process, make the coking coal and nothing in coking mixing coal Bituminous coal merges into an organic whole;The coking mixing coal after bubble, boiling, drying process is entered into stove coking again, high-quality Jiao can be produced.But Moisture of the above-mentioned technical proposal after bubble, boiling step in coal largely raises, and step is also additionally dried, and wastes energy Source and improve cost.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of new pre- hot coal stacking coke production work Skill, can be by improving the viscosity of coal and density, coking time, degree can be greatly shortened, reduce coking chemical waste water and generate and improve Gas quality, there is the advantages of energy-conserving and environment-protective.
The technical scheme that uses to achieve the above object of the present invention is:A kind of pre- hot coal stacking coke production technique, including Following steps:
1) pre-process:Corresponding crushing coal charge addition after blends preheating and crushing, will be weighed according to coal property or do not added Feed coal is mixed to get after adding additives;
2) it is molded:Moulded coal is obtained by feed coal is hot-forming;
3) stacking:Moulded coal stacking is attached to vertical coke oven into coal wall and side;
4) coking:The destructive distillation in vertical coke oven;
5) quenching:Coke is pushed into coke quenching cart, sieves, store after quenching, coal-gas recovering caused by destructive distillation is handled;
Further, the grain diameter for coal charge being crushed in step 1) is less than 2mm;
Further, the temperature of blends preheating is more than 200 DEG C in step 1);
Further, compression ratio hot-forming in step 2) is more than 2:1, briquetting pressure is more than 20MPa;
Further, moulded coal density >=1.25 ton/m hot-forming in step 2)3
Further, moulded coal stacking is put into the dragging on coal plate of charging car into coal wall in step 3), and side is by dragging coal Baffle, by dragging coal plate and dragging the motion of coal baffle plate to be loaded into stacking coal wall is preheated in the furnace chamber of vertical coke oven;
Further, pyrolysis temperature is 750-1250 DEG C in step 4);
Further, retorting time is 14-24h in step 4);
Further, it is pushed into coke quenching cart through coke guide by ripe coke is refined with ram in step 5);Quenching uses Cooled coal gas, nitrogen or vapor quenching, then sieve, store;
Further, coal gas caused by destructive distillation is anxious with cyclic ammonia water after heat exchange is cooled to 600 DEG C -850 DEG C in step 5) It is cooled to 85 DEG C, then chemical products recovery workshop working process is sent to through gas gathering system;
Further, the gas composition obtained is as follows:Methane 25%-34%, nitrogen content 2%-3%, carbon monoxide 7%-10%, hydrogen 50%-55%, CnHm2%-4%, calorific value 17-19MJ/m2
In summary, by adopting the above-described technical solution, the beneficial effects of the invention are as follows:
Technical scheme effectively improves the viscosity of coal by coal preheating so that the dosage of weak caking coal can carry It is high to improve its density to more than 45%, and using thermoforming technology, coking time can be greatly shortened;As-fired coal is preheated Destructive distillation initial temperature can be effectively improved, reduction coking chemical waste water generates and improves gas quality;By being returned to caused gas heat Receive, realize the effect of energy-saving and environmental protection.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
A kind of pre- hot coal stacking coke production technique, comprises the following steps:
1) pre-process:According to coal property by after blends preheating and crushing, weigh the corresponding coal charge that crushes by blending ratio and add Add or be mixed to get feed coal after not adding binding agent;
2) it is molded:Moulded coal is obtained by feed coal is hot-forming;
3) stacking:Coal stacking is attached to vertical coke oven into coal wall and side;
4) coking:The destructive distillation in vertical coke oven;
5) quenching:Coke is pushed into coke quenching cart, sieves, store after quenching, coal-gas recovering caused by destructive distillation is handled;
Preferably, the grain diameter that coal charge is crushed in step 1) is less than 2mm;
Preferably, the temperature of blends preheating is more than 200 DEG C in step 1);
Preferably, compression ratio hot-forming in step 2) is more than 2:1, briquetting pressure is more than 20MPa;
Preferably, moulded coal density >=1.25 ton/m hot-forming in step 2)3
Preferably, moulded coal stacking is put into the dragging on coal plate of charging car into coal wall in step 3), and side is by dragging coal Baffle, by dragging coal plate and dragging the motion of coal baffle plate to be loaded into stacking coal wall is preheated in the furnace chamber of vertical coke oven;
Preferably, pyrolysis temperature is 750-1250 DEG C in step 4);
Preferably, retorting time is 14-24h in step 4);
Preferably, it is pushed into coke quenching cart through coke guide by ripe coke is refined with ram in step 5);Quenching uses Cooled coal gas, nitrogen or vapor quenching, then sieve, store;
Preferably, coal gas caused by destructive distillation is anxious with cyclic ammonia water after heat exchange is cooled to 600 DEG C -850 DEG C in step 5) It is cooled to 85 DEG C, then chemical products recovery workshop working process is sent to through gas gathering system.
Obtained gas composition is as follows:Methane 25%-34%, nitrogen content 2%-3%, carbon monoxide 7%-10%, hydrogen Gas 50%-55%, CnHm2%-4%, calorific value calorific value 17-19MJ/m2
Embodiment 1
A kind of pre- hot coal stacking coke production technique, comprises the following steps:
1) pre-process:Coal charge is preheated respectively, binding coal is preheating to 200-300 DEG C, weak caking coal is preheating to 250-380 DEG C, after above-mentioned coal charge is crushed, weighed accordingly by the blending ratio of binding coal, each 50% weight of weak caking coal Crush after coal charge does not add binding agent and be mixed to get feed coal, the grain diameter for crushing coal charge is less than 2mm;
2) it is molded:Moulded coal is obtained by feed coal is hot-forming, and hot-forming compression ratio is more than 2:1, briquetting pressure is more than 20MPa, obtained hot-forming moulded coal density >=1.25 ton/m3
3) stacking:Moulded coal stacking is put into the dragging on coal plate of charging car into coal wall, and side is led to by dragging coal baffle Cross and drag coal plate and drag the motion of coal baffle plate to be loaded into stacking coal wall is preheated in the furnace chamber of vertical coke oven;
4) coking:The destructive distillation in vertical coke oven, pyrolysis temperature are 750 DEG C, retorting time 14h;
5) quenching:With ram coke quenching cart is pushed into by ripe coke is refined through coke guide;Quenching uses cooled coal gas quenching, Then sieve, store;Coal gas caused by destructive distillation is chilled to 85 DEG C after heat exchange is cooled to 600 DEG C with cyclic ammonia water, then through gas collection System is sent to chemical products recovery workshop working process.
Obtained gas composition is as follows:Methane 34%, nitrogen content 3%, carbon monoxide 7%, hydrogen 50%, CnHm2%, Calorific value 18.9MJ/m2
Embodiment 2
A kind of pre- hot coal stacking coke production technique, comprises the following steps:
1) pre-process:Coal charge is preheated respectively, binding coal is preheating to 200-300 DEG C, weak caking coal is preheating to 250-380 DEG C, after above-mentioned coal charge is crushed, weighed accordingly by the blending ratio of binding coal, each 50% weight of weak caking coal Feed coal is mixed to get after crushing coal charge addition binding agent, the grain diameter for crushing coal charge is less than 2mm;
2) it is molded:Moulded coal is obtained by feed coal is hot-forming, and hot-forming compression ratio is more than 2:1, briquetting pressure is more than 20MPa, obtained hot-forming moulded coal density >=1.25 ton/m3
3) stacking:Moulded coal stacking is put into the dragging on coal plate of charging car into coal wall, and side is led to by dragging coal baffle Cross and drag coal plate and drag the motion of coal baffle plate to be loaded into stacking coal wall is preheated in the furnace chamber of vertical coke oven;
4) coking:The destructive distillation in vertical coke oven, pyrolysis temperature are 1250 DEG C, retorting time 14h;
5) quenching:With ram coke quenching cart is pushed into by ripe coke is refined through coke guide;Quenching uses cooled coal gas quenching, Then sieve, store;Coal gas caused by destructive distillation is chilled to 85 DEG C after heat exchange is cooled to 850 DEG C with cyclic ammonia water, then through gas collection System is sent to chemical products recovery workshop working process.
Obtained gas composition is as follows:Methane 33%, nitrogen content 2%, carbon monoxide 7%, hydrogen 55%, CnHm4%, Calorific value 17.8MJ/m2
Embodiment 3
Exemplified by existing 5.5 meters of tamping coke furnaces, transformed, 200,000 tons of yield of target year increase:
1) briquette shaper is preheated to calculate
Forming machine is the key equipment of production, has considerable influence to the production efficiency and quality of product.According to this work The requirement of skill is, it is necessary to production capacity is big, hot-press forming device.
Dress moulded coal 60 hole, every hole need 1330 pieces of moulded coal daily for the design requirement, and the daily working time is 21 hours, i.e., every Hour needs the moulded coal to be:
N0=(60 × 1330) ÷ 21=3800 parts
Press model SKM600-6B, rated pressure 31.5MPa, the average 7s of single device is selected to produce 1 piece of moulded coal, i.e., Every can produce moulded coal per hour
N=3600 ÷ 7=514 parts
Need press
N=1900 ÷ 514=7.38 platforms, round numbers 8
If 1 standby, therefore selected forming machine number of units is N=9 platforms
2) moulded coal stacking station calculates
Palletizing mechanical is the key equipment of production, has considerable influence to the production efficiency of product.Working time is divided into moulded coal Palletization times and loading time.
Palletization times
T1=20min
Loading time
T2=3.5min
Assuming that calculating cycle has 20% error, then K=1.2
Total operating time
T=K (T1+T2)=1.2 × (20+3.5)=28.2min
Therefore T0=50.4min>T=28.2min, requirement is met using 1 set of stacking station.
Above-described embodiment is in the art the purpose is to be to allow simply to illustrate that the technical concepts and features of the present invention Those of ordinary skill can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all It is the equivalent change or modification according to made by the essence of present invention, should all covers within the scope of the present invention.

Claims (10)

1. a kind of pre- hot coal stacking coke production technique, it is characterised in that comprise the following steps:
1) pre-process:Corresponding crushing coal charge addition after blends preheating and crushing, will be weighed according to coal property or do not added viscous Feed coal is mixed to get after knot agent;
2) it is molded:Moulded coal is obtained by feed coal is hot-forming;
3) stacking:Moulded coal stacking is attached to vertical coke oven into coal wall and side;
4) coking:The destructive distillation in vertical coke oven;
5) quenching:Coke is pushed into coke quenching cart, sieves, store after quenching, coal-gas recovering caused by destructive distillation is handled.
2. a kind of pre- hot coal stacking coke production technique as claimed in claim 1, it is characterised in that coal charge is crushed in step 1) Grain diameter be less than 2mm.
A kind of 3. pre- hot coal stacking coke production technique as claimed in claim 1, it is characterised in that blends preheating in step 1) Temperature be more than 200 DEG C.
4. a kind of pre- hot coal stacking coke production technique as claimed in claim 1, it is characterised in that hot-forming in step 2) Compression ratio be more than 2:1, briquetting pressure is more than 20MPa.
5. a kind of pre- hot coal stacking coke production technique as claimed in claim 2, it is characterised in that hot-forming in step 2) Moulded coal density >=1.25 ton/m3
6. a kind of pre- hot coal stacking coke production technique as claimed in claim 1, it is characterised in that by moulded coal code in step 3) Pile is put into the dragging on coal plate of charging car into coal wall, and side passes through the fortune dragged coal plate He drag coal baffle plate by dragging coal baffle It is dynamic that preheating stacking coal wall is loaded into the furnace chamber of vertical coke oven.
A kind of 7. pre- hot coal stacking coke production technique as claimed in claim 1, it is characterised in that pyrolysis temperature in step 4) For 750-1250 DEG C.
A kind of 8. pre- hot coal stacking coke production technique as claimed in claim 1, it is characterised in that retorting time in step 4) For 14-24h.
9. a kind of pre- hot coal stacking coke production technique as claimed in claim 1, it is characterised in that ram is used in step 5) Ripe coke will be refined and be pushed into coke quenching cart through coke guide;Quenching uses cooled coal gas, nitrogen or vapor quenching, then sieve, Storage.
10. a kind of pre- hot coal stacking coke production technique as claimed in claim 1, it is characterised in that destructive distillation is produced in step 5) Raw coal gas is chilled to 85 DEG C, then be sent to chemical production through gas gathering system after heat exchange is cooled to 600 DEG C -850 DEG C with cyclic ammonia water Product recovery workshop working process.
CN201710608272.3A 2017-07-24 2017-07-24 A kind of pre- hot coal stacking coke production technique Pending CN107400527A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109097071A (en) * 2018-09-29 2018-12-28 山西沁新能源集团股份有限公司 A kind of heating means producing formed coke
CN111187634A (en) * 2019-11-24 2020-05-22 石晶 Intelligent forming, stacking and coking production method

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109097071A (en) * 2018-09-29 2018-12-28 山西沁新能源集团股份有限公司 A kind of heating means producing formed coke
CN109097071B (en) * 2018-09-29 2021-01-01 山西沁新能源集团股份有限公司 Heating method for producing formed coke
CN111187634A (en) * 2019-11-24 2020-05-22 石晶 Intelligent forming, stacking and coking production method

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