CN203653258U - System for preparing active cokes - Google Patents

System for preparing active cokes Download PDF

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Publication number
CN203653258U
CN203653258U CN201320825347.0U CN201320825347U CN203653258U CN 203653258 U CN203653258 U CN 203653258U CN 201320825347 U CN201320825347 U CN 201320825347U CN 203653258 U CN203653258 U CN 203653258U
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China
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pyrolysis
outlet
gas
coke
furnace
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CN201320825347.0U
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Inventor
杨小彦
郑化安
张生军
赵奕程
徐婕
张栋博
李鑫
侯文杰
谭晓婷
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Shaanxi Coal and Chemical Technology Institute Co Ltd
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Shaanxi Coal and Chemical Technology Institute Co Ltd
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Abstract

The utility model discloses a system for preparing active cokes. The system comprises a pyrolysis furnace, wherein a pyrolysis coke outlet of the pyrolysis furnace is connected with an inlet of a dry coke quenching furnace; a cooled pyrolysis coke outlet of the dry coke quenching furnace is connected with a crushing machine; an outlet of the crushing machine is connected with a dry-method sorting machine; a pyrolysis coke outlet of the dry-method sorting machine is connected with a screening machine; a large granular material outlet of the screening machine is communicated with a feed port of an activation furnace; a small granular material outlet of the screening machine is connected with a forming machine; a discharge port of the forming machine is communicated with the feed port of the activation furnace. The system disclosed by the utility model is used for forming and activating the pyrolysis coke which is generated through pyrolysis of powdered coal and is crushed so as to prepare the active cokes; compared with the conventional process, the carbonization process which is high in energy consumption and extremely high in pollution is not needed, treatment processes are simplified, the production cost is reduced, and the problems that the existing active cake preparation system and process are complex in treatment process, long in time consumption, high in energy consumption, high in cost, serious in pollution and the like are solved.

Description

A kind of activated coke preparation system
Technical field
The utility model belongs to and coal chemical technology, is specifically related to a kind of activated coke preparation system.
Background technology
Gac is a kind of good porous adsorbing material, has unique pore structure and absorption property, be widely used in the processes such as purification of water quality, off gas treatment and Catalyst Production, but gac is expensive, physical strength is low.
Compared with gac, activated coke has overcome that gac price is high, physical strength is low, the shortcoming of easy pulverizing, there is good absorption and catalytic performance, stable chemical performance, and can regenerate, can reuse, in ambient water, gas Pollution abatement field, replace gac by activated coke, there is actual meaning.The preparation method of traditional activated coke is take raw coal as matrix, and raw coal, through the treatment process such as coal blending or alkali cleaning, mixes with binding agent coal tar, forms through processes such as extrusion molding, charing, activation and modifications.Preparation process length consuming time, energy consumption is large, cost is high, and charing simultaneously and reactivation process can cause larger pollution.
Utility model content
The utility model object is to overcome prior art defect, and a kind of activated coke preparation system is provided, and solves traditional activated coke preparation method's process length consuming time, energy consumption is large, cost is high and pollute large problem.
For achieving the above object, the utility model adopts following scheme:
A kind of activated coke preparation system, comprise pyrolysis oven, the burnt outlet of pyrolysis of pyrolysis oven is connected with coke dry quenching furnace entrance, the burnt outlet of cooling pyrolysis of coke dry quenching furnace is connected with crusher, crusher outlet is connected with dry method cull eliminator, and the burnt outlet of pyrolysis of dry method cull eliminator is connected with sieve apparatus, and the large granular materials outlet of sieve apparatus is communicated with activation furnace opening for feed, the small particles material outlet of sieve apparatus is connected with forming machine, and forming machine discharge port is communicated with activation furnace opening for feed.
The pneumatic outlet of described coke dry quenching furnace is connected with fly-ash separator, fly-ash separator pneumatic outlet is connected with threeway through interchanger, threeway two exports respectively and is communicated with coke dry quenching furnace cooling gas inlet and activation furnace activated gas entrance, interchanger vapour outlet is communicated with activation furnace steam-in, and the outlet of fly-ash separator dust is communicated with dry method cull eliminator feed(raw material)inlet.
Described pyrolysis oven pyrolysis oil gas vent is connected with gas-liquid separator, and gas-liquid separator liquid exit is connected with tar separator.
Described gas-liquid separator pneumatic outlet is communicated with desulfurization and denitrification reaction device, and the activated coke outlet of activation furnace is communicated with the catalyst inlet of desulfurization and denitrification reaction device.
Described activation furnace pneumatic outlet is connected with condenser.
After the burnt fragmentation of pyrolysis that the utility model produces pulverized coal pyrolysis, can make activated coke through moulding, activation, compare traditional technology saved energy consumption large, produce and pollute great carbonization process, treatment process is simplified, reduce production cost, solved existing activated coke preparation system and art breading complex procedures, length consuming time, energy consumption is large, cost is high and the problem such as seriously polluted.
The utility model has following beneficial effect compared to existing technology:
(1) take pyrolysis Jiao after pyrolysis of coal as raw material, obtain qualified activated coke raw materials, the burnt resource of high-ash pyrolysis is fully used;
(2) be provided with sieve apparatus, by the burnt branch of the pyrolysis of different-grain diameter processing treatment, save tooling cost, can obtain the activated coke product of different size simultaneously;
Further, also have the following advantages:
(1) quenching process and the coupling of activated coke preparation process, the steam that quenching produces mixes the activator of preparing as activated coke with rare gas element, not only accomplished heat energy recycle, and greatly reduced activated coke preparation cost;
(2) the burnt moulding process of pyrolysis adds CaO and Fe 2o 3deng additive, by-product hydrogen in the time that activated coke activates, the activated coke making is as the catalyzer of pyrolysis gas desulphurization denitration, and gained activated coke has the H of removing 2s, NH 3activity, remove the H in pyrolysis gas 2s, NH 3be purified pyrolysis gas.
Accompanying drawing explanation
Fig. 1 is activated coke preparation technology schematic flow sheet;
Fig. 2 is the activated coke preparation technology's schematic flow sheet after improving;
Figure: 1 - pyrolysis furnace 2 - CDQ furnace 3 - Dust 4 - Crusher 5 - dry sorting machine 6 - screening machine 7 - molding machine 8 - exchanger 9 - activation furnace 10 - tee 11 - gas-liquid separator 12 - tar separator 13 - desulfurization and denitrification reactor 14 - condenser 20 - pulverized 21 - petroleum products 22 - pyrolysis temperatures coke 23 - supplemental inert gas 24 - mixed inert gas 25 - coke quenching gas 26 - cooling pyrolysis coke 27 - dust coke quenching gas 28 - pyrolysis coke dust 29 - broken pyrolysis coke 30 - mixed pyrolysis coke 31 - circulating water 32 - coke quenching gas cooling 33 - circulating inert gas 34 - activation of inert gas 35 - vapor 36 - ash 37 - low ash pyrolysis coke 38 - large particle pyrolysis coke (2-13mm) 39 - late pyrolysis coke (<2mm) 40 - forming pyrolysis coke 41 - mixed pyrolysis coke particles 42 - gas mixture 43 - activated coke 44 - pyrolysis 45 - crude tar 46 - water 47 - tar 48 - sale of activated coke 49 - partially activated coke 50 - purifying pyrolysis 51 - gaseous products (rich in H2, CO, etc.) 52 - pyrolysis condensate system A-B-C-quenching system sorting system activated coke preparation system D-E-F-gas purification systems for gas separation system .
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail:
As shown in Figure 1, activated coke preparation system of the present utility model comprises 4 systems, and A is pyrolysis system, and B is quench system, and C is separation system, and D is activated coke preparation system.Pyrolysis system A comprises pyrolysis oven 1, gas-liquid separator 11, tar separator 12; Quench system B comprises coke dry quenching furnace 2, fly-ash separator 3, interchanger 8 and threeway 10; Separation system C comprises crusher 4, dry method cull eliminator 5 and sieve apparatus 6; Activated coke preparation system D comprises forming machine 7 and activation furnace 9.
In pyrolysis system A, pyrolysis oven 1 has two outlets, and wherein 21 outlets of oil gas product are connected with gas-liquid separator 11 entrances, burnt 22 outlets of pyrolysis that another outlet is high temperature; Gas-liquid separator 11 has two outlets, and one of them exports for pyrolysis gas 44, and another crude tar oil 45 outlets are connected with tar separator 12 entrances, and tar separator 12 top exits are that pyrolysis waste water 46 exports, and outlet at bottom is that coal tar 47 exports.In quench system B, coke dry quenching furnace 2 has two outlets, and wherein 25 outlets of top quenching gas are connected with fly-ash separator 3 entrances, and burnt 26 outlets of bottom coohng pyrolysis are connected with crusher 4 entrances; Fly-ash separator 3 has two outlets, and 27 outlets of top dedusting quenching gas are connected with interchanger 8 entrances, and bottom is that 28 outlets of pyrolysis coke powder dirt are connected with dry method cull eliminator 5 entrances; Interchanger 8 has two outlets, and wherein cooling quenching gas 32 outlets are connected with threeway 10 entrances, and another outlet is connected with activation furnace 9 steam-ins for water vapour 35 exports; After circulated inert gas 33 outlets of threeway 10 mix with topping up 23, enter in coke dry quenching furnace 2, another outlet exports for activating rare gas element 34.In separation system C, crusher 4 outlets are connected with dry method cull eliminator 5 entrances; Dry method cull eliminator 5 has two outlets, wherein directly outer row of a part of lime-ash 36, and burnt 37 outlets of another low ash content pyrolysis are connected with sieve apparatus 6 entrances.In activated coke preparation system D, forming machine 7 outlets are connected with activation furnace 9 entrances, and activation furnace 9 has two outlets, produces respectively gaseous mixture 42 and activated coke 43.
In pyrolysis system A, burnt 22 outlets of the pyrolysis of pyrolysis oven bottom high temperature are connected with the burnt entrance of coke dry quenching furnace 2 pyrolysis in quench system B; Burnt 26 outlets of cooling pyrolysis of quench system B are connected with crusher 4 entrances of separation system C, and 28 outlets of pyrolysis coke powder dirt and the crusher 4 of separation system C of the fly-ash separator 3 of quench system B exports after broken pyrolysis burnt 29 mixes and be connected with dry method cull eliminator 5 entrances; The large particle diameter pyrolysis burnt 38 that separation system C sieve apparatus 6 exports and moulding pyrolysis Jiao 40 of activated coke preparation system D are mixed into the burnt particle 41 of mixed pyrolysis, in activated coke preparation system D, there are three entrances, one of them entrance is connected with activation rare gas element 34 outlets of quench system B interchanger 8, and 7 outlets are connected another entrance with forming machine with the burnt outlet of sieve apparatus 6 macrobead pyrolysis respectively.
Based on the activated coke preparation method of above system, its technical process is as follows:
Fine coal 20 is sent in pyrolysis oven 1 after the middle low temperature pyrogenation of 500-800 ℃, oil gas product 21 is sent into gas-liquid separator 11 by outlet at bottom, obtain pyrolysis gas 44 and crude tar oil 45 through gas-liquid separation, crude tar oil enters the rear separation of tar separator 12 and obtains water 46 and product coal tar 47; Pyrolysis Jiao 22 of the solid product high temperature after pyrolysis sends into coke dry quenching furnace 2, after rare gas element is cooling, the quenching gas 25 of discharging from coke dry quenching furnace 2 tops enters fly-ash separator 3, quenching gas 2 after dedusting is sent into interchanger 8, carry out after abundant heat exchange with recirculated water 31, after gas cooling through threeway 10, a part is sent into the activation furnace of activated coke preparation system D, another part returns to mix with topping up 23 sends into coke dry quenching furnace 2 recycles, and recirculated water is converted into water vapour 35 and enters the activation furnace of activated coke preparation system D after heat exchange heats up; The pyrolysis of cooling pyrolysis Jiao 26 of coke dry quenching furnace 2 outlet at bottoms after crusher 4 fragmentations is burnt is mixed into dry method cull eliminator 5 with the pyrolysis coke powder dirt 28 of fly-ash separator 3 bottoms, remove high-ash part through sorting, low ash content pyrolysis Jiao 37 sieves through sieve apparatus 6, wherein the pyrolysis breeze 39 of <2mm enters activation furnace 9 with large particle diameter pyrolysis Jiao 38 of 2-13mm after forming machine 7 moulding, after activation 30-90min by water vapour 35 and rare gas element in activation furnace, obtain qualified Product Activity burnt 43 and portion gas mixture 42.
Above activated coke preparation system and processing method can realize take pulverized coal pyrolysis product pyrolysis Jiao as raw material prepares activated coke, but still there is the problems such as material and energy utilization be not high, innovative approach is proposed in following system and technique: 1., in activated coke preparation process, add Fe for these problems 2o 3after CaO, can make activated coke by-product hydrogen in activation, and gained activated coke has the H of removing 2s and NH 3function; 2. utilize the sorbent material that portioned product pyrolysis Jiaozhuo is pyrolysis system pyrolysis gas desulphurization denitration, reduce pyrolysis gas and purify cost; 3. obtain hydrogen-rich gaseous product from activation furnace expellant gas product through condensation separation water, can be used as derived product processing and utilization, improve the utility value of byproduct.
As shown in Figure 2, the system after improvement adds gas treating system E after pyrolysis system A, and after activated coke preparation system, D adds gas separation system F.The pyrolysis gas 44 of gas-liquid separator 11 top exits in pyrolysis system A is connected with desulfurization and denitrification reaction device 13 entrances of gas treating system E, in activated coke preparation system D, burnt 43 outlets of the Product Activity of activation furnace 9 outlet at bottoms are connected with the desulfurization and denitrification reaction device 13 of gas treating system E, gaseous mixture 42 outlets of activation furnace 9 top exits are connected with condenser 14 entrances, be hydrogen-rich gaseous product 51 through cooler condenser 14 top exits, bottom is water of condensation 52.
Technical process after improvement is as follows:
Fine coal 20 is sent in pyrolysis oven 1 after the middle low temperature pyrogenation of 500-800 ℃, oil gas product 21 is sent into gas-liquid separator 11 by outlet at bottom, obtain pyrolysis gas 44 and crude tar oil 45 through gas-liquid separation, crude tar oil enters the rear separation of tar separator 12 and obtains water 46 and product coal tar 47; Pyrolysis Jiao 22 of the solid product high temperature after pyrolysis sends into coke dry quenching furnace 2, after rare gas element is cooling, the quenching gas 25 of discharging from coke dry quenching furnace 2 tops enters fly-ash separator 3, quenching gas 2 after dedusting is sent into interchanger 8, carry out after abundant heat exchange with recirculated water 31, after gas cooling through threeway 10, a part is sent into the activation furnace of activated coke preparation system D, another part returns to mix with topping up 23 and sends into coke dry quenching furnace 2 and recycle, and recirculated water is converted into water vapour 35 and enters the activation furnace of activated coke preparation system D after heat exchange heats up; The pyrolysis of cooling pyrolysis Jiao 26 of coke dry quenching furnace 2 outlet at bottoms after crusher 4 fragmentations is burnt is mixed into dry method cull eliminator 5 with the pyrolysis coke powder dirt 28 of fly-ash separator 3 bottoms, remove high-ash part through sorting, low ash content pyrolysis Jiao 37 sieves through sieve apparatus 6, and wherein to add mass ratio be CaO and the Fe of 1-10% to the pyrolysis breeze 39 of <2mm 2o 3deng after additive after forming machine 7 moulding, with large particle diameter pyrolysis Jiao 38 of 2-13mm in batches or together with enter activation furnace 9, in activation furnace, by after water vapour 35 and rare gas element activation 30-90min, obtain qualified Product Activity burnt 43 and portion gas mixture 42; Most of activated coke is as commodity selling, and part activated coke can be used as the catalyzer that in the pyrolysis system A in the utility model, pyrolysis gas purifies, and in desulfurization and denitrification reaction device 13, removes H 2s, NH 3be purified pyrolysis gas Deng gas, the hydrogen of enrichment volume ratio 50-80% in the gaseous mixture of activation furnace outlet, be admitted in condenser 14 and obtain purer hydrogen-rich gas through condensation except anhydrating, can be mixed for derived product processing with purifying pyrolysis gas, or carry out separately derived product processing.
By specific embodiment, the utility model method is described below:
Embodiment 1: particle diameter <100mm fine coal is in pyrolysis oven, after the temperature pyrolysis of 500-800 ℃, oil gas product is sent into gas-liquid separator separates and is obtained pyrolysis gas and crude tar oil, and crude tar oil enters tar separator separation and obtains water and product coal tar; After pyrolysis, pyrolysis Jiao sends into coke dry quenching furnace, be cooled to 150-350 ℃ through rare gas element, the quenching gas at coke dry quenching furnace top enters fly-ash separator, after dedusting, send into interchanger, carry out after abundant heat exchange with recirculated water, after gas cooling, through threeway, a part is sent into activation furnace, another part returns to mix with topping up sends into coke dry quenching furnace recycle, and recirculated water is converted into the water vapour of 300-450 ℃ and enters activation furnace after heat exchange heats up; The burnt mix dust of pyrolysis after pyrolysis Jiao and the dedusting of cooling pyrolysis Jiao of coke dry quenching furnace bottom outlet after crusher in crushing is removed high-ash part through sorting, obtain ash content <10%(mass ratio) pyrolysis Jiao through screening, wherein after the pyrolysis breeze moulding of <2mm, enter activation furnace with large particle diameter pyrolysis Jiao of 2-13mm, in activation furnace, activate after 30-90min by water vapour and rare gas element, obtain median size and be respectively 9mm, 6mm, specific surface area is 400-600m -1product Activity Jiao.
Embodiment 2: particle diameter <100mm fine coal is in pyrolysis oven, after the temperature pyrolysis of 500-800 ℃, oil gas product is sent into gas-liquid separator separates and is obtained pyrolysis gas and crude tar oil, and crude tar oil enters tar separator separation and obtains water and product coal tar; After pyrolysis, pyrolysis Jiao sends into coke dry quenching furnace, be cooled to 150-350 ℃ through rare gas element, the quenching gas at coke dry quenching furnace top enters fly-ash separator, after dedusting, send into interchanger, carry out after abundant heat exchange with recirculated water, after gas cooling, through threeway, a part is sent into activation furnace, another part returns to mix with topping up sends into coke dry quenching furnace recycle, and recirculated water is converted into the water vapour of 300-450 ℃ and enters activation furnace after heat exchange heats up; Cooling pyrolysis Jiao of coke dry quenching furnace bottom outlet after crusher in crushing with dedusting after the burnt mix dust of pyrolysis remove high-ash part through sorting, obtain ash content <10%(mass ratio) pyrolysis Jiao through screening, wherein large particle diameter pyrolysis Jiao of 2-13mm enters activation furnace, in activation furnace, activate by water vapour and rare gas element, activation temperature 700-900 ℃, soak time 30-90min, obtain median size and be respectively 9mm, 6mm, specific surface area is 400-600m -1product Activity Jiao.It is CaO and the Fe of 1-10% that the pyrolysis breeze of <2mm adds mass ratio 2o 3aftershaping, sends into after activation furnace after above-mentioned reaction, obtains median size 6mm, 3mm, and specific surface area is 500-700m -1product Activity Jiao, select the part activated coke cleaning catalyst as pyrolysis system pyrolysis gas, under 300-600 ℃ of condition, the H in pyrolysis gas 2decreasing ratio>=80% of S, NH 3decreasing ratio>=60%.In the time of the activated coke of preparation small particle size, in activation furnace, the gaseous product of by-product enrichment hydrogen dewaters and can obtain hydrogen volume than the gaseous product that accounts for 50-80% through condenser simultaneously, mixes as Downstream processing unstripped gas with purification pyrolysis gas.

Claims (5)

1. an activated coke preparation system, it is characterized in that: comprise pyrolysis oven (1), the burnt outlet of pyrolysis of pyrolysis oven (1) is connected with coke dry quenching furnace (2) entrance, the burnt outlet of cooling pyrolysis of coke dry quenching furnace (2) is connected with crusher (4), crusher (4) outlet is connected with dry method cull eliminator (5), the burnt outlet of pyrolysis of dry method cull eliminator (5) is connected with sieve apparatus (6), the large granular materials outlet of sieve apparatus (6) is communicated with activation furnace (9) opening for feed, the small particles material outlet of sieve apparatus (6) is connected with forming machine (7), forming machine (7) discharge port is communicated with activation furnace (9) opening for feed.
2. activated coke preparation system according to claim 1, it is characterized in that: the pneumatic outlet of described coke dry quenching furnace (2) is connected with fly-ash separator (3), fly-ash separator (3) pneumatic outlet is connected with threeway (10) through interchanger (8), threeway (10) two outlets are communicated with coke dry quenching furnace (2) cooling gas inlet and activation furnace (9) activated gas entrance respectively, interchanger (8) vapour outlet is communicated with activation furnace (9) steam-in, and the outlet of fly-ash separator (3) dust is communicated with dry method cull eliminator (5) feed(raw material)inlet.
3. activated coke preparation system according to claim 1 and 2, is characterized in that: described pyrolysis oven (1) pyrolysis oil gas vent is connected with gas-liquid separator (11), and gas-liquid separator (11) liquid exit is connected with tar separator (12).
4. activated coke preparation system according to claim 3, it is characterized in that: described gas-liquid separator (11) pneumatic outlet is communicated with desulfurization and denitrification reaction device (13), the activated coke outlet of activation furnace (9) is communicated with the catalyst inlet of desulfurization and denitrification reaction device (13).
5. activated coke preparation system according to claim 3, is characterized in that: described activation furnace (9) pneumatic outlet is connected with condenser (14).
CN201320825347.0U 2013-12-13 2013-12-13 System for preparing active cokes Withdrawn - After Issue CN203653258U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103723727A (en) * 2013-12-13 2014-04-16 陕西煤业化工技术研究院有限责任公司 Active coke preparation system and method
CN104312605A (en) * 2014-09-23 2015-01-28 赵建勋 Method for preparing combustible gas and active coke powder through pyrolysis
CN108654633A (en) * 2017-03-29 2018-10-16 鞍钢股份有限公司 A kind of low-temperature denitration catalyst and preparation method thereof and application method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103723727A (en) * 2013-12-13 2014-04-16 陕西煤业化工技术研究院有限责任公司 Active coke preparation system and method
CN103723727B (en) * 2013-12-13 2016-05-11 陕西煤业化工技术研究院有限责任公司 A kind of activated coke preparation system and method
CN104312605A (en) * 2014-09-23 2015-01-28 赵建勋 Method for preparing combustible gas and active coke powder through pyrolysis
CN108654633A (en) * 2017-03-29 2018-10-16 鞍钢股份有限公司 A kind of low-temperature denitration catalyst and preparation method thereof and application method
CN108654633B (en) * 2017-03-29 2021-04-02 鞍钢股份有限公司 Low-temperature denitration catalyst and preparation method and use method thereof

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