CN208414289U - A kind of processing dry method carbide slag realizes the device of acetylene gas recycling - Google Patents
A kind of processing dry method carbide slag realizes the device of acetylene gas recycling Download PDFInfo
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- CN208414289U CN208414289U CN201820888853.7U CN201820888853U CN208414289U CN 208414289 U CN208414289 U CN 208414289U CN 201820888853 U CN201820888853 U CN 201820888853U CN 208414289 U CN208414289 U CN 208414289U
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- fixed bed
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- acetylene
- carbide slag
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Abstract
The utility model discloses the device that a kind of processing dry method carbide slag realizes acetylene gas recycling, including fixed bed reactors, the top of fixed bed reactors is provided with guide chamber, and lower part is provided with gas distributor, and gas distributor is connected to CO2The gas source of exhaust gas；Discharging device is arranged in the bottom of fixed bed reactors, and fixed bed reactors are also communicated with acetylene separation equipment, and guide chamber includes up big and down small cone barrel, and the bottom of guide chamber offers the channel that powder enters fixed bed reactors lower part；CO2Exhaust gas flows from the bottom up, and the powder for reacting needs from the bottom up, sufficiently reacts in fixed bed reactors, improves the efficiency of acetylene gas recycling, CO is utilized2Exhaust gas, while converting the granulated carbide slag easily to disperse for calcium carbonate granule in the device of the utility model, it is discharged by discharging device, convenient for storage transhipment, the acetylene gas of recycling also avoids VOCs discharge.
Description
Technical field
The utility model belongs to acetylene gas recycling field, and in particular to a kind of processing dry method carbide slag realization acetylene gas time
The device of receipts.
Background technique
Corvic (PVC) is one of big resins for universal use in the world five, in social life with its cost performance outstanding
It is widely used.Calcium carbide (CaC2) through acetylene gas (C2H2) production PVC carbide acetylene route because rich coal resources,
Simple process is mature, is the main technical schemes of current China PVC production, and the PVC yield of domestic calcium carbide route in 2016 is more than
10000000 tons, account for 70% of total output or more.Acetylene is the target product of the intermediate product that PVC is produced and calcium carbide hydrolysis,
Economic value is high, and production cost is at 7000 yuan/ton or more.Carbide slag is then the waste residue of calcium carbide hydrolysis, and main component is hydrogen-oxygen
Change calcium, economic value is low, now mainly as the calcareous raw material in cement plant.The 80% of PVC production cost is the cost of material of acetylene,
Therefore the various losses of acetylene should be reduced in production process to the greatest extent.
Drying acetylene production technology water saving advantage is obvious, is west area acetylene industrial expansion trend.1t calcium carbide adds water
About 300 kilograms of acetylene gas is produced, while generating the butt carbide slag of 1.2t.The carbide slag of early stage wet process acetylene technology discharges
For moisture content 90% or so, correspondence can generate the industrial wastes of 10t or so, be commonly called as carbide slag slurries.Most of producers are by carbide slag
Slurry is further dehydrated after gravitational settling, but the moisture content of filter cake still reaches 40%-50%, is in starchiness, in transit easily
Leakage pollution road surface, long-term accumulation not only occupies a large amount of soils, and has serious corrosion function to soil.With national energy-saving
The continuous reinforcement of emission reduction and environmental requirement, the environmental pollution that wet process acetylene generates are increasingly subject to the attention of country and manufacturer,
Forbid ratifying wet process acetylene project in some areas." drying acetylene generation technique " is that work occurs for the acetylene of calcium carbide hydrolysis in recent years
One Important Techmical Progress of skill, process are that the little particle calcium carbide of 3-5mm enters generator by screw(-type) feeder.Occur
The water mist that device top showerhead generates is reacted with calcium carbide generates acetylene, carries a large amount of heat, dust and foreign gas in acetylene gas,
Washed cooling tower removes dust and heat, then removes impurity by peace and quiet tower, is finally sent to VCM synthesis procedure.The electricity of generation
Rock ballast is discharged from generator lower part, enters dry residue chamber by FU conveyer, bucket elevator.The carbide slag moisture content of dry acetylene generation process
Only 5% or so, transport and stockpiling cost can be greatly reduced.It is computed a set of 500,000 tons/year of PVC device, drying acetylene
Technique can water-saving about 400,000 tons/a than wet process acetylene technique.Therefore drying acetylene technology was included in from 2007 by State Environmental Protection Administration
" the advanced prevention and cure of pollution exemplary teachings item of country " and " the environmental protection register that country encourages development ", the country start to increase research and development
And it is promoted.
Though drying acetylene technology is promoted in recent years, place need to be improved there are also some, wherein more main be exactly
Reduce acetylene number of dropouts.
Although the technique of dissolved acetylene is lost in drying acetylene deslagging fewer than Wetting acetylene and overflow, discharge
It is adsorbed with acetylene in " dry slag " and entrainment discharge acetylene (therefore needs overall process closed, and use nitrogen between particle packing gap
Micro-positive pressure protection).There is Research Literature to show that carbide slag adsorbs so that Wetting is compared in the acetylene gas loss in dry acetylene generation process
Technique is lost more, points out that the acetylene amount adsorbed in carbide slag is 80% or so of total number of dropouts in individual documents.At present
There are no the acetylene gas recovery technology and equipment developed for dry method carbide slag, enterprise is usually taken to reduce production cost
Direct emission mode not only causes acetylene resource and greatly wastes, while the direct emission of acetylene gas will will lead to atmosphere
Middle VOCs increases, and in turn results in the pollution and destruction of environment.Therefore, in order to reduce enterprise's production cost, resource utilization is improved,
It reduces environmental pollution, there is an urgent need to develop a kind of devices of extensive resource utilization of dry method carbide slag.
Utility model content
In order to solve problems of the prior art, the utility model discloses a kind of realizations of processing dry method carbide slag
The device of acetylene gas recycling carries out inexpensive recycling and reusing to acetylene, improves resource utilization, reduce environmental pollution.
To achieve the goals above, the technical solution adopted in the utility model is a kind of processing dry method carbide slag realization second
The device of alkynes gas recycling, including fixed bed reactors open up feed inlet at the top of fixed bed reactors, fixed bed reactors it is upper
Portion is provided with guide chamber, and lower part is provided with gas distributor, and guide chamber is connected to feed inlet, and gas distributor is connected to CO2Exhaust gas
Gas source；Discharging device is arranged in the bottom of fixed bed reactors, and fixed bed reactors are also communicated with acetylene separation equipment, guide chamber packet
Up big and down small cone barrel is included, the bottom of guide chamber offers the channel that powder enters fixed bed reactors lower part.
The side wall of fixed bed reactors is additionally provided with gas collection outlet chamber, and acetylene separation equipment passes through gas collection outlet
Chamber is connected to fixed bed reactors.
The side wall of fixed bed reactors is additionally provided with Sidewall Height direction of the gas collection outlet chamber along fixed bed reactors
It is provided with multiple.
Gas distributor includes ventilation pipe, and several stomatas are offered on pipeline, further includes the support for fixed -piping
Device, gas distributor are fixedly connected by the support device with fixed bed reactors.
Venthole it is opening down, air vent aperture becomes larger along gas flow.
The hole passed through for powder is provided on gas distributor.
Gas distributor is arranged at the 1/3~1/2 of fixed bed reactors height, and distributor is along fixed bed reactors height
Direction is provided with multilayer；The 1/2~1/3 of fixed bed reactors height is arranged in guide chamber.
It is additionally provided with the baffle for preventing powder from flying upward above guide chamber, offers stomata on baffle.
Guide chamber bottom offers several mesh.
Compared with prior art, the utility model at least has the advantages that the lower part setting of fixed bed reactors
Guide chamber is arranged in gas distributor, the top of fixed bed reactors, and gas distributor is connected to CO2The gas source of exhaust gas, guide chamber
Bottom offers the channel that powder enters fixed bed reactors lower part, so that CO2Exhaust gas flows from the bottom up, reacts the powder of needs
Material from the bottom up, sufficiently reacts in fixed bed reactors, improves CO2Exhaust-gas treatment dry method carbide slag realizes acetylene gas recycling
Efficiency, the desorption that the heat released and the water vapour of generation can then further speed up acetylene gas in carbide slag reaction process are precipitated
Process, while converting the granulated carbide slag easily to disperse for calcium carbonate granule in the device of the utility model, by discharging
Device discharge, convenient for storage transhipment, the acetylene gas of recycling also avoids VOCs discharge, has biggish environment protection significance.
Further, multiple gas collection outlet chambers are arranged along height side in the side wall of fixed bed reactors, by different parts
Acetylene gas be all collected, and be discharged.
Further, gas distributor includes ventilation pipe, and several stomatas are offered on pipeline and promote CO2Exhaust gas is uniform
It is delivered in powder and is sufficiently reacted with powder.
Further, the opening down of venthole prevents powder from blocking venthole, and air vent aperture gradually becomes along gas flow
Greatly, further promote CO2Exhaust gas is more uniform to be delivered in fixed bed reactors.
Further, gas distributor is arranged at the 1/3~1/2 of fixed bed reactors height, and distributor is along height side
To being provided with multilayer；The 1/2~1/3 of fixed bed reactors height is arranged in guide chamber, is conducive to gas and powder in opposite fortune
It is sufficiently reacted in dynamic.
Further, baffle is arranged in the top of guide chamber, offers stomata on baffle, can effectively prevent powder and fly upward, and
And acetylene can be smoothly discharged.
Further, guide chamber bottom opens up the top that several mesh reach gas distributor for powder lot dispersing.
Detailed description of the invention
Fig. 1 is using power plant and cement plant CO2The flow diagram of vent gas treatment dry method carbide slag recycling acetylene；
In attached drawing, 1- fixed bed reactors, 2- carbide slag charging gear, 3- guide chamber, 4- gas distributor, 5- discharging dress
It sets, 6- gas discharging chamber, 7- acetylene separation equipment, 8-CO2Gas access.
Specific embodiment
With reference to the accompanying drawing and the utility model is described in detail in embodiment.
CO2Exhaust-gas treatment dry method carbide slag realizes the recycling of acetylene gas using fixed bed reactors, as shown in Figure 1,
A kind of processing dry method carbide slag realizes the device of acetylene gas recycling, including fixed bed reactors 1, fixed bed reactors
1 top opens up feed inlet, and the top of fixed bed reactors 1 is provided with guide chamber 3, and guide chamber 3 is connected to feed inlet, and lower part is set
It is equipped with gas distributor 4, gas distributor 4 is connected to CO2The gas source of exhaust gas；Discharging device is arranged in the bottom of fixed bed reactors 1
5, fixed bed reactors 1 are also communicated with acetylene separation equipment 7, and guide chamber 3 includes up big and down small cone barrel, the bottom of guide chamber 3
Portion offers the channel that powder enters 1 lower part of fixed bed reactors；The side wall of fixed bed reactors 1 is additionally provided with outside gas collection
Chamber 6 is arranged, acetylene separation equipment 7 is connected to by gas collection outlet chamber 6 with fixed bed reactors 1；The side wall of fixed bed reactors 1
It is additionally provided with gas collection outlet chamber 6 and is provided with multiple, the packet of gas distributor 4 along the Sidewall Height direction of fixed bed reactors 1
Ventilation pipe is included, several stomatas are offered on pipeline, further includes the support device for fixed -piping, gas distributor 4 passes through
The support device is fixedly connected with fixed bed reactors 1；The hole passed through for powder, gas are provided on gas distributor 4
Distributor 4 is arranged at the 1/3~1/2 of fixed bed reactors height, and distributor 4 is provided with along fixed bed reactors short transverse
Multilayer；The 1/2~1/3 of fixed bed reactors height is arranged in guide chamber 3, and the top of guide chamber 3 is additionally provided with for preventing powder
Expect the baffle flown upward, offers stomata on baffle.
Venthole it is opening down, air vent aperture becomes larger along gas flow.
3 bottom of guide chamber offers several mesh.
To improve the acetylene rate of recovery, gas distributor 4 and guide chamber 3 are set in fixed bed reactors 1.Fixed bed reactors
1 can both redesign manufacture, can also be transformed by existing carbide slag warehouse to realize.According to production needs to guide chamber
3 structure and position optimize and adjust and the structure to gas distributor 4, position and quantity are optimized and adjusted.
The purpose of acetylene separation equipment is that the remaining CO carried secretly in gas will be recycled2It is removed with vapor, convenient for recycling gas and thick acetylene
Enter subsequent purification workshop section after gas mixing and realizes recycling.
The big end of cone cylinder is fixedly connected with fixed bed reactors 1, and the upper end diameter of cone cylinder is greater than lower end diameter, cone cylinder and its
The side wall of the fixed bed reactors 1 of top surrounds guide chamber 3, and gas discharging chamber 6 collects the gas of fixed bed reactors 1, fixed
Gas in the gas 1 of bed reactor 1 converges in gas discharging chamber 6, then goes to be passed through acetylene separation equipment 7；Gas distribution
Device 4 includes the pipeline of several connections, offers several stomatas on pipeline.
Carbide slag charging gear 2 is gone back in the connection of fixed bed reactors 1, by carbide slag charging gear 2 to fixed bed reactors 1
Convey dry method carbide slag.
A kind of method of acetylene gas recycling is realized using CO2 exhaust-gas treatment dry method carbide slag by the utility model, specifically
The following steps are included:
Step 1, the dry method carbide slag that workshop section occurs for acetylene is added into fixed bed reactors 1, dry method carbide slag is through guide
Chamber 3 is piled into taper material heap after being distributed in reactor；After calcium carbide slag material layer floods gas distributor 4, CO is opened2Gas
Gas source and preheat CO2Gas, the CO2The ingredient of gas and source do not require, including from periphery power plant or cement plant
CO2Exhaust gas.
Step 2, when carbide slag thickness of feed layer is more than 3 lower edge of guide chamber, formation Stabilizing Materials are honored as a queen, and gas distributor 4 is passed through
Preheated CO is imported into calcium carbide slag material layer2Gas, preheated CO2Gas from CO2Gas access enters gas distributor 4；
CO2Gas temperature section be room temperature to 200 DEG C, CO2Gas imports the calcium carbide slag material layer under guide chamber 3 with dispersity；CO2
Flow according in reactor carbide slag stabilization inlet amount adjust, generally require CO2Tolerance is the 10% of theoretical reacting dose, is
Prevent the air-hole blockage on gas distributor, it is desirable that CO2Ejection gas velocity maintain 3m/s or more, pressure is adjusted accordingly
Section.
Step 3, CO2After gas reacts 1h-2h with carbide slag material heap, discharging device 5 is opened, acetylene is realized into fully reacting
Fixed bed reactors 1 are discharged in the calcium carbonate powder of desorption, are delivered to the raw materials for production of surge bunker or cement plant as cement；Out
The feeding speed of the discharging speed and 1 upper belt of fixed bed reactors of expecting device 5 is coordinated, it is ensured that the material of fixed bed reactors 1
The stabilization of layer moves down；Or carry out intermittent discharge in batches.
Step 4, remaining CO will be reacted in fixed bed reactors 12Gas, the vapor of generation and de- with calcium carbonate powder
Attached acetylene gas passes to acetylene separation equipment 7；Remnants CO is removed using quick lime bed in acetylene separation equipment 72And vapor
And recycle acetylene, or realize using conventional acetylene cleaning process sodium-hypochlorite process or sulfuric acid process, with specific reference to field condition and
Process requirement selection.
Step 5, mixed gas described in step 4 obtains acetylene recycling gas product after the separation of acetylene separation equipment 7, through second
The acetylene recycling gas obtained after the processing of alkynes separation equipment is product, is made after can mixing with the thick acetylene obtained in acetylene generator
For the raw material of subsequent production.
Embodiment 1
Carbide slag from dry acetylene generators is filled in 2 centimetres of radius, in 8 centimetres of glass tube of height, and light
Tapping glass tube wall keeps the carbide slag powder in pipe closely knit, and the loadings of carbide slag powder are 75g.The lower part of glass tube is set
Stock supporting plate is equipped with gas distribution grid, 100 DEG C of CO2Gas in the flow access tube of 0.5L/min with carbide slag to contact instead
It answers, the throughput and composition transfer of synchronous detection glass tube upper end.Reaction was completed after ventilation 2h, and dismantles glass tube detection glass
Solid component in managing, discovery part carbide slag are converted into calcium carbonate, the main component of glass tube upper end gas be water vapour with
Carbon dioxide, the thick acetylene tolerance being collected into is about 0.07g.
Embodiment 2
The dry method carbide slag with example 1 with batch is selected, is filled in 2 centimetres of radius, the glass tube of 8 centimetres of height
It is interior, and gently tapping glass tube wall keeps the carbide slag powder in pipe closely knit, the loadings of carbide slag powder are still 75g, by 100
DEG C CO2Gas imports calcium carbide slag material layer by gas distribution grid with the flow of 0.75L/min and is in contact with it reaction, after the 1h that ventilates
Reaction was completed, and measuring the thick acetylene tolerance being collected into is about 0.055g.
Embodiment 3
Fixed bed reactors 1 are made according to Fig. 1 shown device, a diameter of 0.3m is highly 0.5 meter, and inside filling is dry
The method calcium carbide quantity of slag is 30 kilograms, and the bottom of fixed bed reactors 1 is provided with gas distributor 4, would be heated to 120 DEG C of CO2Gas
Body imports in carbide slag material heap from the gas distributor 4 of fixed bed reactors 1, and throughput is controlled in 0.1Nm3/ min, reaction
After 60min from reactor upper collection to the thick acetylene gas scale of construction be about 50g.
The protection scope of the utility model is not limited to the above embodiments, and those skilled in the art are in this patent meaning
Determine the simple technique index done in range transformation and material replacement is included within the protection scope of this patent.
Claims (9)
1. the device that a kind of processing dry method carbide slag realizes acetylene gas recycling, which is characterized in that including fixed bed reactors (1),
Feed inlet is opened up at the top of fixed bed reactors (1), the top of fixed bed reactors (1) is provided with guide chamber (3), lower part setting
Have gas distributor (4), guide chamber (3) is connected to feed inlet, and gas distributor (4) is connected to CO2The gas source of exhaust gas；Fixed bed reaction
Discharging device (5) are arranged in the bottom of device (1), and fixed bed reactors (1) are also communicated with acetylene separation equipment (7), guide chamber (3) packet
Up big and down small cone barrel is included, the bottom of guide chamber (3) offers the channel that powder enters fixed bed reactors (1) lower part.
2. the device that a kind of processing dry method carbide slag according to claim 1 realizes acetylene gas recycling, which is characterized in that Gu
The side wall of fixed bed reactor (1) is additionally provided with gas collection outlet chamber (6), and acetylene separation equipment (7) passes through gas collection outlet
Chamber (6) is connected to fixed bed reactors (1).
3. the device that a kind of processing dry method carbide slag according to claim 2 realizes acetylene gas recycling, which is characterized in that Gu
The side wall of fixed bed reactor (1) is additionally provided with gas collection outlet chamber (6) and sets along the Sidewall Height direction of fixed bed reactors (1)
It is equipped with multiple.
4. the device that a kind of processing dry method carbide slag according to claim 1 realizes acetylene gas recycling, which is characterized in that gas
Body distributor (4) includes ventilation pipe, and several stomatas are offered on pipeline, further includes the support device for fixed -piping, gas
Body distributor (4) is fixedly connected by the support device with fixed bed reactors (1).
5. the device that a kind of processing dry method carbide slag according to claim 4 realizes acetylene gas recycling, which is characterized in that logical
Stomata it is opening down, air vent aperture becomes larger along gas flow.
6. the device that a kind of processing dry method carbide slag according to claim 4 realizes acetylene gas recycling, which is characterized in that gas
Body distributor is provided with the hole passed through for powder on (4).
7. the device that a kind of processing dry method carbide slag according to claim 1 realizes acetylene gas recycling, which is characterized in that gas
Body distributor (4) is arranged at the 1/3~1/2 of fixed bed reactors height, and distributor (4) is along fixed bed reactors short transverse
It is provided with multilayer；Guide chamber (3) is arranged in the 1/2~1/3 of fixed bed reactors height.
8. the device that a kind of processing dry method carbide slag according to claim 1 realizes acetylene gas recycling, which is characterized in that lead
It is additionally provided with the baffle for preventing powder from flying upward above material chamber (3), offers stomata on baffle.
9. the device that a kind of processing dry method carbide slag according to claim 1 realizes acetylene gas recycling, which is characterized in that lead
Material chamber (3) bottom offers several mesh.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820888853.7U CN208414289U (en) | 2018-06-08 | 2018-06-08 | A kind of processing dry method carbide slag realizes the device of acetylene gas recycling |
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| CN201820888853.7U CN208414289U (en) | 2018-06-08 | 2018-06-08 | A kind of processing dry method carbide slag realizes the device of acetylene gas recycling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108530252A (en) * | 2018-06-08 | 2018-09-14 | 陕西煤业化工技术研究院有限责任公司 | A kind of processing dry method carbide slag realizes the device and technique of acetylene gas recycling |
| CN111912936A (en) * | 2020-06-22 | 2020-11-10 | 中国科学院过程工程研究所 | Emergency nitrogen charging-forced ventilation combined explosion-proof system and method based on acetylene gas real-time monitoring in high-dust environment |
-
2018
- 2018-06-08 CN CN201820888853.7U patent/CN208414289U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108530252A (en) * | 2018-06-08 | 2018-09-14 | 陕西煤业化工技术研究院有限责任公司 | A kind of processing dry method carbide slag realizes the device and technique of acetylene gas recycling |
| CN108530252B (en) * | 2018-06-08 | 2024-01-23 | 陕西煤业化工技术研究院有限责任公司 | Device and process for realizing acetylene gas recovery by treating dry-method carbide slag |
| CN111912936A (en) * | 2020-06-22 | 2020-11-10 | 中国科学院过程工程研究所 | Emergency nitrogen charging-forced ventilation combined explosion-proof system and method based on acetylene gas real-time monitoring in high-dust environment |
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