CN206705690U - A kind of production system of calcium carbide - Google Patents
A kind of production system of calcium carbide Download PDFInfo
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- CN206705690U CN206705690U CN201621353448.2U CN201621353448U CN206705690U CN 206705690 U CN206705690 U CN 206705690U CN 201621353448 U CN201621353448 U CN 201621353448U CN 206705690 U CN206705690 U CN 206705690U
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Abstract
It the utility model is related to a kind of production system of calcium carbide.The system includes feed coal crushing system, the vertical pyrolysis oven of down-flow fluidized bed using ECT, lime fragmentation cell, CaC2Reactor and tail gas heat exchange unit, feed coal crushing system includes feed coal entrance and coal export, the vertical pyrolysis oven of down-flow fluidized bed using ECT includes coal entrance, high-temperature oil gas extraction mouth and high-temperature semi-coke outlet, lime fragmentation cell includes lime inlet, upper sieve material outlet and lower sieve material outlet, tail gas heat exchange unit includes sieving material outlet, CaC on sieve material entrance, calcium carbide stove exhaust entrance and heating lime on lime2Reactor includes carbide raw material entrance, calcium carbide discharging opening and calcium carbide stove exhaust outlet, and calcium carbide product is synthesized for smelting；Calcium carbide stove exhaust outlet is connected with the calcium carbide stove exhaust entrance of tail gas heat exchange unit.The production system of calcium carbide described in the utility model, powder material can be selected, while be effectively utilized high-temperature tail gas sensible heat caused by calcium carbide production process, reduce the cost of raw material, greatly save the energy expenditure of calcium carbide smelting.
Description
Technical field
The utility model relates generally to the production field of calcium carbide, and in particular to a kind of production system of calcium carbide.
Background technology
Calcium carbide, mainly for the production of acetylene and ethynylation chemical product, was once described as a kind of important industrial chemicals
" mother of organic synthesis industry ".Consider from National energy distribution, " rich coal, oil-poor, few gas " is the typical case of China's energy resource structure
Feature, coal are the main energy sources in China, account for the 70% of primary energy, and therefore, calcium carbide production is anticipated for Industrial Economic Development
Justice is great.
Traditional calcium carbide production mainly uses electrothermal way, i.e., using lump lime and block coke as raw material, in furnace of calcium carbide
By electric arc heated to more than 2000 degrees Celsius, by equation CaO+3C=CaC2+ CO reaction principle carries out pyrolytic semlting production electricity
Stone.Consider from the requirement to carbon raw, traditional calcium carbide production technology is primarily present following defect：(1) carbon materials is required
Granularity is in 5-30mm, fixed carbon content>84%th, ash content<15%, it disclosure satisfy that only coke, semicoke, the petroleum coke of these requirements
And some high-quality anthracites, and these raw material reserves are extremely limited, it is expensive；(2) can be with raw material shattering process
15-20% raw material goes out of use because granularity is less than 5mm, causes the serious waste of resource；(3) mainly used in calcium carbide production
Block carbon raw material and lime, mass transfer and heat transfer efficiency are low, and reaction rate is relatively low, and it is only 50% left that calcium carbide, which smelts furnace thermal efficiency,
The right side, power consumption are up to 3250kWh/t calcium carbides or so.It can be seen that the quality of carbon raw directly affects the Yield and quality of calcium carbide, electric power
The economic indicator such as unit consumption and cost.
Consider from the property of raw coal, ash, sulphur and other a small amount of mineral matters are contained in raw coal.Most of former pit ash is all high
In the ash requirements upper limit of carbide raw material, raw coal need to be carried out to sort deliming processing.It can be divided into wet method by the difference of separating medium
Sorting and the major class of dry separation two, coal fully contacts with water during wet split, increase coal selecting product moisture and follow-up carbon
The dehydration energy of raw material；And conventional dry separation is added using normal temperature air as separating medium, the surface moisture of raw coal
Contact sticking probability between particle, actual separating effect is caused to be deteriorated.In addition, in recent years, journey is adopted as Coal Mechanical melts
The raising of degree, fine coal content of the raw coal in recovery process account for 40-60%, and it is left that the poor low-order coal of hardness even accounts for 70%
The right side, this granularity obviously with traditional calcium carbide manufacturing technique requirent carbon raw are runed counter to more than 5mm.
And there is substantial amounts of waste heat to produce during calcium carbide is generated, if having wasted energy without being used
Amount.
To solve the shortcomings of traditional calcium carbide production technology is to ingredient requirement harshness, highly energy-consuming, high pollution, poor benefit, widen
The scope of the carbon-based raw material of calcium carbide, calcium carbide production technology are further improved.
Therefore, in view of the above-mentioned problems, being necessary to provide the production system and method for a kind of calcium carbide, can solve traditional calcium carbide life
The problems such as production. art is to ingredient requirement harshness, highly energy-consuming, high pollution, poor benefit, and the waste gas in calcium carbide production process is carried out
Recycle.
Utility model content
In view of the above-mentioned problems, the utility model aims to provide the production system and method for a kind of calcium carbide, the system and method
Purpose be solve the problems, such as waste heat in calcium carbide production technology waste, highly energy-consuming.Meanwhile the utility model will solve calcium carbide life
High request problem of the production. art to raw material.
The production system of calcium carbide provided by the utility model includes：The vertical pyrolysis oven of feed coal crushing system, down-flow fluidized bed using ECT, stone
Grey fragmentation cell, CaC2Reactor and tail gas heat exchange unit, wherein, the feed coal crushing system includes feed coal entrance and coal
Outlet, for the broken of feed coal；The vertical pyrolysis oven of down-flow fluidized bed using ECT includes coal entrance, high-temperature oil gas extraction mouth and high-temperature semi-coke
Outlet, the pyrolysis for coal；The coal entrance is connected with the coal export of the feed coal crushing system；The lime fragmentation cell
Including lime inlet, upper sieve material outlet and lower sieve material outlet, the broken and screening for lime；The tail gas heat exchange unit includes
Sieve material outlet on sieve material entrance, calcium carbide stove exhaust entrance and heating lime, sieve material and calcium carbide stove exhaust on lime on lime
Heat exchange；Sieve material entrance is connected with the upper sieve material outlet of the lime fragmentation cell on the lime；The CaC2Reactor bag
Carbide raw material entrance, calcium carbide discharging opening and calcium carbide stove exhaust outlet are included, calcium carbide product is synthesized for smelting；The carbide raw material enters
The high-temperature semi-coke outlet with the vertical pyrolysis oven of the down-flow fluidized bed using ECT, the lower sieve material of the lime fragmentation cell export, are described mouth respectively
The outlet of sieve material is connected on the heating lime of tail gas heat exchange unit；The calcium carbide stove exhaust outlet and the electricity of the tail gas heat exchange unit
Stone furnace exhaust gas entrance is connected.
Further, tail gas heat exchange unit described in said system includes raw material cabin, heat exchanger, sack cleaner；It is described
The entrance of raw material cabin is connected with sieve material outlet on the lime；The outlet of the raw material cabin and the solid material of the heat exchanger
Entrance is connected；The solid matter outlet of the heat exchanger and the CaC2The carbide raw material entrance of reactor is connected；It is described
The gas access of heat exchanger and the CaC2The calcium carbide stove exhaust outlet of reactor is connected；The gas vent of the heat exchanger with
The gas access of the sack cleaner is connected.
Above-mentioned system, the system also include water-oil separating unit, it include high-temperature oil gas entrance, pyrolysis gas outlet and
Profit exports；The high-temperature oil gas entrance is connected with the high-temperature oil gas extraction mouth of the vertical pyrolysis oven of the down-flow fluidized bed using ECT.
Above-mentioned system, the system may also include blending bunker, and it is located at the CaC2Before reactor, including under lime
Sieve material entrance, high-temperature semi-coke entrance, heat sieve material entrance and mixed material outlet on lime；Sieve material entrance and institute under the lime
The lower sieve material outlet for stating lime fragmentation cell is connected, the high temperature half of the high-temperature semi-coke entrance and the vertical pyrolysis oven of the down-flow fluidized bed using ECT
Jiao outlet is connected, and sieve material entrance is connected with sieve material outlet on the heating lime of the tail gas heat exchange unit on the heating lime,
The mixed material outlet and the CaC2The carbide raw material entrance of reactor is connected.
According to above-mentioned technical proposal of the present utility model, can solve traditional calcium carbide production technology it is harsh to ingredient requirement,
The problems such as highly energy-consuming, high pollution, poor benefit, and the high-temperature tail gas sensible heat in calcium carbide production process is recycled, reduce
The energy consumption of calcium carbide production process.
Brief description of the drawings
Fig. 1 is the production system flow chart of the calcium carbide of the utility model embodiment.
Embodiment
Below in conjunction with drawings and examples, specific embodiment of the present utility model is described in more details, with
Just the advantages of better understood when scheme and various aspects of the present utility model.However, specific implementations described below side
Formula and embodiment are for illustrative purposes only, rather than to limitation of the present utility model.
Fig. 1 is the production system flow chart of calcium carbide provided by the utility model.
The system mainly includes feed coal crushing system, the vertical pyrolysis oven of down-flow fluidized bed using ECT, lime fragmentation cell, CaC2Reactor
With tail gas heat exchange unit, the vertical pyrolysis oven of down-flow fluidized bed using ECT is re-fed into after feed coal is crushed using feed coal crushing system and is pyrolyzed, profit
After lime raw material is crushed with lime fragmentation cell, then coal dust is mixed with pulverized limestone and is sent into CaC2Reactor smelts synthesis electricity
Stone.It is of the present utility model to focus on having broken conventional each unit and CaC2The technique framework of reactor isolated operation, is realized
The coupling of energy in production process, caused heat in production pilot process is recycled, reduces CaC2Synthesis is anti-
The energy consumption answered, improve the efficiency of system.
Specifically, feed coal crushing system includes feed coal entrance and coal export, for the broken of feed coal.
The vertical pyrolysis oven of down-flow fluidized bed using ECT includes coal entrance and high-temperature semi-coke exports, the pyrolysis for coal；The coal entrance
It is connected with the coal export of the feed coal crushing system.
The lime fragmentation cell includes lime inlet, upper sieve material outlet and lower sieve material outlet, for the broken of lime with
Screening.
It should be noted that upper sieve material herein refers to lime particle or lime block, lower sieve material refers to pulverized limestone.
The tail gas heat exchange unit, which includes sieving on sieve material entrance, calcium carbide stove exhaust entrance and heating lime on lime, expects
Mouthful, the heat exchange of sieve material and calcium carbide stove exhaust on lime；Sieve material entrance and the lime fragmentation cell is upper on the lime
The outlet of sieve material is connected.
Specifically, the tail gas heat exchange unit includes raw material cabin, heat exchanger, sack cleaner；The entrance of the raw material cabin
It is connected with sieve material outlet on the lime；The outlet of the raw material cabin is connected with the solid material inlet of the heat exchanger；
The solid matter outlet of the heat exchanger and the CaC2The carbide raw material entrance of reactor is connected；The gas of the heat exchanger
Entrance and the CaC2The calcium carbide stove exhaust outlet of reactor is connected；The gas vent of the heat exchanger and the bag-type dust
The gas access of device is connected.
The CaC2Reactor includes carbide raw material entrance, calcium carbide discharging opening and calcium carbide stove exhaust outlet, is closed for smelting
Into calcium carbide product；The carbide raw material entrance exports with the high-temperature semi-coke of the vertical pyrolysis oven of the down-flow fluidized bed using ECT respectively, the lime
The outlet of sieve material is connected in the lower sieve material outlet of fragmentation cell, the heating lime of the tail gas heat exchange unit；The calcium carbide stove exhaust
Outlet is connected with the calcium carbide stove exhaust entrance of the tail gas heat exchange unit.
In order to recycle oil gas caused by pyrolysis, system may also include water-oil separating unit, and it includes high-temperature oil gas and entered
Mouth, pyrolysis gas outlet and profit outlet；The high-temperature oil gas of the high-temperature oil gas entrance and the vertical pyrolysis oven of the down-flow fluidized bed using ECT produces
Mouth is connected.
On the coal and lime after pyrolysis material feeding CaC is sieved under sieve material and lime2Before reactor, after realizing pyrolysis
The sensible heat utilization of solid material is, it is necessary to mix several materials, thus above-mentioned system may also include blending bunker, it is located at
The CaC2Before reactor, including sieve expects entrance, high-temperature semi-coke entrance, heats sieve material entrance and mixture on lime under lime
Material outlet；Sieve material entrance is connected with the lower sieve material outlet of the lime fragmentation cell under the lime, the high-temperature semi-coke entrance
It is connected with the high-temperature semi-coke outlet of the vertical pyrolysis oven of the down-flow fluidized bed using ECT, sieve material entrance exchanges heat with the tail gas on the heating lime
The outlet of sieve material is connected on the heating lime of unit, the mixed material outlet and the CaC2The carbide raw material entrance phase of reactor
Even.
The concrete operation step of the production method of calcium carbide provided by the utility model is as follows：
The vertical pyrolysis oven of down-flow fluidized bed using ECT is sent into after feed coal is crushed into ＜ 3mm, is allowed to that fast pyrogenation occurs at 800-900 DEG C
Reaction, high temperature raw coke oven gas and more than 800 DEG C of high-temperature semi-coke being generated, high temperature raw coke oven gas separates by the cooling of water-oil separating unit,
Obtain pyrolysis gas and coal tar.
For lime after lime fragmentation cell crushing and screening, ＜ 1mm powdered lime can be directly entered CaC2Reactor, 1mm-
3mm block lime enters tail gas heat exchange unit, is exchanged heat with high-temperature tail gas.After reclaiming calcium carbide stove exhaust sensible heat, 1mm-3mm block
The high-temperature semi-coke powder of more than 800 DEG C of the acquisition of shape lime and ＜ 1mm pulverized limestone and the vertical pyrolysis oven of down-flow fluidized bed using ECT, mixing are latter together
Into CaC2Reactor, chemical reaction generation CaC occurs more than 1800 DEG C2With 600-1000 DEG C of the furnace of calcium carbide based on CO
Tail gas.600-1000 DEG C of calcium carbide stove exhaust enters tail gas heat exchange unit with obtaining low temperature furnace of calcium carbide tail after the heat exchange of cold lime block
Gas.
From such scheme, the production system and method for calcium carbide provided by the utility model, pass through block lime and tail
Gas exchanges heat, and can reclaim calcium carbide stove exhaust sensible heat, and solving traditional calcium carbide and smelting furnace exhaust gas does not have a waste heat recovery, but direct water
Cold cooling, furnace of calcium carbide water consume is big, and heat loss is big, and efficiency is low.
The utility model can also make pyrolysis unit and CaC2Generator carries out energy coupling, that is, realizes solid material after pyrolysis
Sensible heat utilization, reduce CaC2The energy consumption of synthetic reaction, the efficiency of system is improved, broken traditional calcium carbide smelting process, heat
Solve unit and calcium carbide smelting unit is relatively independent, two units do not have the technique framework of energy coupling, and it is big to solve system energy consumption
The problem of.
Meanwhile the system can carry out the production of calcium carbide using powder material, overcome traditional calcium carbide production technology to raw material
It is required that the shortcomings of harshness, highly energy-consuming, high pollution, poor benefit.
Illustrate the technical solution of the utility model with reference to specific embodiment.
Institute's taking technique condition value is exemplary in following embodiments, and its desirable number range is as indicated above in book
It is shown.
Embodiment 1
The vertical pyrolysis oven of down-flow fluidized bed using ECT is sent into after feed coal is crushed into ＜ 3mm, is allowed to that fast pyrogenation occurs at 800 DEG C or so
Reaction, high temperature raw coke oven gas and more than 800 DEG C of high-temperature semi-coke being generated, high temperature raw coke oven gas separates by the cooling of water-oil separating unit,
Obtain pyrolysis gas and coal tar.
For lime after lime fragmentation cell crushing and screening, ＜ 1mm powdered lime can be directly entered CaC2Reactor, 1mm-
3mm block lime enters tail gas heat exchange unit, is exchanged heat with high-temperature tail gas.After reclaiming calcium carbide stove exhaust sensible heat, 1mm-3mm block
The high-temperature semi-coke powder of more than 800 DEG C of the acquisition of shape lime and ＜ 1mm pulverized limestone and the vertical pyrolysis oven of down-flow fluidized bed using ECT, mixing are latter together
Into CaC2Reactor, chemical reaction generation CaC occurs more than 1800 DEG C2With 600 DEG C or so of the furnace of calcium carbide tail based on CO
Gas.Calcium carbide stove exhaust enters tail gas heat exchange unit with obtaining low temperature calcium carbide stove exhaust after the heat exchange of cold lime block.
Embodiment 2
The vertical pyrolysis oven of down-flow fluidized bed using ECT is sent into after feed coal is crushed into ＜ 3mm, is allowed to that fast pyrogenation occurs at 850 DEG C or so
Reaction, high temperature raw coke oven gas and more than 800 DEG C of high-temperature semi-coke being generated, high temperature raw coke oven gas separates by the cooling of water-oil separating unit,
Obtain pyrolysis gas and coal tar.
For lime after lime fragmentation cell crushing and screening, ＜ 1mm powdered lime can be directly entered CaC2Reactor, 1mm-
3mm block lime enters tail gas heat exchange unit, is exchanged heat with high-temperature tail gas.After reclaiming calcium carbide stove exhaust sensible heat, 1mm-3mm block
The high-temperature semi-coke powder of more than 800 DEG C of the acquisition of shape lime and ＜ 1mm pulverized limestone and the vertical pyrolysis oven of down-flow fluidized bed using ECT, mixing are latter together
Into CaC2Reactor, chemical reaction generation CaC occurs more than 1800 DEG C2With 800 DEG C or so of the furnace of calcium carbide tail based on CO
Gas.Calcium carbide stove exhaust enters tail gas heat exchange unit with obtaining low temperature calcium carbide stove exhaust after the heat exchange of cold lime block.
Embodiment 3
The vertical pyrolysis oven of down-flow fluidized bed using ECT is sent into after feed coal is crushed into ＜ 3mm, is allowed to that fast pyrogenation occurs at 900 DEG C or so
Reaction, high temperature raw coke oven gas and more than 800 DEG C of high-temperature semi-coke being generated, high temperature raw coke oven gas separates by the cooling of water-oil separating unit,
Obtain pyrolysis gas and coal tar.
For lime after lime fragmentation cell crushing and screening, ＜ 1mm powdered lime can be directly entered CaC2Reactor, 1mm-
3mm block lime enters tail gas heat exchange unit, is exchanged heat with high-temperature tail gas.After reclaiming calcium carbide stove exhaust sensible heat, 1mm-3mm block
The high-temperature semi-coke powder of more than 800 DEG C of the acquisition of shape lime and ＜ 1mm pulverized limestone and the vertical pyrolysis oven of down-flow fluidized bed using ECT, mixing are latter together
Into CaC2Reactor, chemical reaction generation CaC occurs more than 1800 DEG C2With 1000 DEG C or so of the furnace of calcium carbide based on CO
Tail gas.Calcium carbide stove exhaust enters tail gas heat exchange unit with obtaining low temperature calcium carbide stove exhaust after the heat exchange of cold lime block.
As seen from the above-described embodiment, the technical solution of the utility model can effectively utilize the sensible heat for being pyrolyzed high-temp solid, and
High temperature calcium carbide stove exhaust part sensible heat, producing calcium carbide by using powder raw materials through can be used, towards resource and the maximized direction of energy utilization
Development, positive effect is suffered to whole calcium carbide production industry and social environment.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And the restriction not to embodiment.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.And thus
Among the obvious changes or variations amplified out is still in the scope of protection of the utility model.
Claims (4)
1. a kind of production system of calcium carbide, the system includes feed coal crushing system, the vertical pyrolysis oven of down-flow fluidized bed using ECT, lime and crushed
Unit, CaC2Reactor and tail gas heat exchange unit, wherein,
The feed coal crushing system includes feed coal entrance and coal export, for the broken of feed coal；
The vertical pyrolysis oven of down-flow fluidized bed using ECT includes coal entrance, high-temperature oil gas extraction mouth and high-temperature semi-coke outlet, the pyrolysis for coal；
The coal entrance is connected with the coal export of the feed coal crushing system；
The lime fragmentation cell includes lime inlet, upper sieve material outlet and lower sieve material outlet, the broken and screening for lime；
The tail gas heat exchange unit includes sieve material outlet on sieve material entrance, calcium carbide stove exhaust entrance and heating lime on lime, uses
In the heat exchange of sieve material and calcium carbide stove exhaust on lime；The upper sieve of sieve material entrance and the lime fragmentation cell expects on the lime
Mouth is connected；
The CaC2Reactor includes carbide raw material entrance, calcium carbide discharging opening and calcium carbide stove exhaust outlet, and calcium carbide is synthesized for smelting
Product；The high-temperature semi-coke outlet with the vertical pyrolysis oven of the down-flow fluidized bed using ECT, the lime are broken single respectively for the carbide raw material entrance
The outlet of sieve material is connected in the lower sieve material outlet of member, the heating lime of the tail gas heat exchange unit；Calcium carbide stove exhaust outlet with
The calcium carbide stove exhaust entrance of the tail gas heat exchange unit is connected.
2. system according to claim 1, it is characterised in that the tail gas heat exchange unit includes raw material cabin, heat exchanger, cloth
Bag dust collector；The entrance of the raw material cabin is connected with sieve material outlet on the lime；The outlet of the raw material cabin is changed with described
The solid material inlet of hot device is connected；The solid matter outlet of the heat exchanger and the CaC2The carbide raw material of reactor enters
Mouth is connected；The gas access of the heat exchanger and the CaC2The calcium carbide stove exhaust outlet of reactor is connected；The heat exchange
The gas vent of device is connected with the gas access of the sack cleaner.
3. system according to claim 1, it is characterised in that the system also includes water-oil separating unit, and it includes height
Warm oil gas entrance, pyrolysis gas outlet and profit outlet；The high temperature of the high-temperature oil gas entrance and the vertical pyrolysis oven of the down-flow fluidized bed using ECT
Oil gas extraction mouth is connected.
4. system according to claim 1, it is characterised in that the system also includes blending bunker, and it is located at the CaC2Instead
Before answering device, including sieve expects entrance, high-temperature semi-coke entrance, heats sieve material entrance and mixed material outlet on lime under lime；Institute
State under lime sieve material entrance and exported with the lower sieve material of the lime fragmentation cell and is connected, the high-temperature semi-coke entrance with it is described descending
The high-temperature semi-coke outlet of bed vertical pyrolysis oven is connected, the heating of sieve material entrance and the tail gas heat exchange unit on the heating lime
The outlet of sieve material is connected on lime, the mixed material outlet and the CaC2The carbide raw material entrance of reactor is connected.
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| CN201621353448.2U CN206705690U (en) | 2016-12-09 | 2016-12-09 | A kind of production system of calcium carbide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430202A (en) * | 2016-12-09 | 2017-02-22 | 神雾环保技术股份有限公司 | Calcium carbide production system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430202A (en) * | 2016-12-09 | 2017-02-22 | 神雾环保技术股份有限公司 | Calcium carbide production system and method |
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