CN203672164U - Purified ash returning combustion system of calcium carbide furnace - Google Patents

Abstract

A purified ash returning combustion system of a calcium carbide furnace comprises a sealed purified ash collecting bin, a pneumatic conveying sender, a sealed blanking bin, a conveying air source and a flow mixing chamber. Nitrogen is respectively filled into the sealed purified ash collecting bin and the pneumatic conveying sender which are communicated, a pneumatic conveying pipe is connected with the sealed blanking bin and the pneumatic conveying sender, nitrogen is filled into the pneumatic conveying pipe, and the conveying air source is a pressure source provided by a terminal. The purified ash returning combustion system can directly performs field conveying recovery on the purified ash from calcium carbide production devices, solves the problem of difficult purified ash recovery and conveying due to high-temperature, flammable, combustible, sticking characteristics and the like and achieves smooth and unblocked field conveying. The sealed blanking bin can ensure stable purified ash conveying amount in a combustion furnace. The transportation cost for purified ash recycle can be saved, the output value can be improved, and profits and earnings can be increased. In addition, energy-saving benefit is further obtained, and the purpose of pollutant discharge reduction is achieved.

Description

Furnace of calcium carbide purifies ash and returns stove combustion system

Technical field

The utility model relates to a kind of recycling system of dust state flue gas, and specifically a kind of furnace of calcium carbide purifies ash and returns stove combustion system.

Background technology

Closed calcium carbide furnace exhaust temperature is high, and tolerance fluctuation is large, tail gas complicated, in tail gas, dust granules footpath is tiny, viscosity is stronger, exhaust temperature is at 650 to 1200 ℃, dust concentration 100 to 250g/Nm ³, the CO that contains 75% left and right and a small amount of coal tar composition, the therefore aobvious viscosity of inflammable, explosive, the dust of closed calcium carbide furnace tail gas, meanwhile, dust granules specific area is large, light specific gravity, be insoluble in water.The tail gas composition of closed calcium carbide furnace is specifically as table one: (by mass)

As can be seen from the above table, in tail gas, the content of CO is very high, can be used as fuel or the raw material of industry after purification.In dust, the content of loss on ignition and CaO is the highest, and they come from respectively coke, blue charcoal and lime, and through the seizure of deduster, the dust of collecting is all the superfine particle of granularity, gives transportation arrival certain difficulty.

Existing calcium carbide stove exhaust (containing gaseous state tail gas and dust-like solid particle tail gas) cleaning and recovering process is more, and what effect was more satisfactory mainly contains following three kinds:

(1) wet cleaning utilization, the method is fast to tail gas cooling, and it is high that tertiary effluent is washed efficiency, but have tar to separate out, the tar so wall easily bonds, need to often clean, and causes secondary pollution;

(2) directly utilize rear dedusting, by the tail gas of closed calcium carbide furnace without dedusting, but directly make fuel, because dust has a very strong absorption affinity, heat exchange area at boiler easily bonds, and thickly when serious reaches 5 to 10mm, even if adopt ash blowing and cleaning technology to be also difficult to thoroughly remove, necessary blowing out deashing, has reduced operating efficiency;

(3) after dry method dust, recycle, this kind of method is divided into again two kinds, one is calcium carbide stove exhaust to be entered after aerial cooler to settling dust remover, after two-stage dedusting, enter subordinate, it greatly reduces the temperature of tail gas, but dust removing effects is not good, the dust not eliminating uses and makes troubles to subordinate, the dedusting of often need to stopping, benefit is reduced, in addition, the method passes into calcium carbide stove exhaust to recycle bag-type dust after air blast cooling device and deliver to limekiln, equipment simple operations is convenient, although main frame need to be selected resisting blower, cost is relatively high, but the fan operation time is long, without abnormal accident and general dust stratification not, after purifying, gained dust can be able to smooth dispatch to unloading grey unit, but sack cleaner is easily burnt, another kind is first to deliver to settling dust remover through calcium carbide stove exhaust through thick gas blower fan, remove the big dust particle in tail gas in the mode of gravity, take away a part of heat simultaneously, then pass through cooling cyclone, the cyclone of jacket type makes tail gas rotate into device, remove the dust of remaining larger particles, take away most heats, as chopped-off head cooling cyclone fails to remove dust completely or temperature drop does not reach the receptible temperature of sack cleaner, control system can start even three grades of cooling cyclone running dedusting coolings of secondary automatically, until dedusting is thorough, temperature drop reaches requirement, finally cleaning of off-gas is sent into limekiln, the dust stratification (claiming to purify ash) that all dedusters of this cleaning system are collected is carried to collect by chain scraper machine and is unloaded ash can, owing to purifying grey temperature high (between 170 to 180 ℃), be powdery and easily adhesion, inflammable, explosive, so in the time being transported to the user of subordinate, need to be after corresponding PROCESS FOR TREATMENT, use extraordinary transport vehicle and be transported to the user of subordinate.

From above-mentioned several calcium carbide stove exhaust cleaning and recovering process, in " recycling after dry method dust " technique, when the tail gas recycle after purifying is utilized, also the dust in tail gas (claiming to purify ash) is carried out to effective collection.But in prior art, to collected purification ash, or deal with as common dregs, cause the occupied and contaminated of soil; After respective handling, adopt Special type transportation vehicle to be transported to user place, this kind uses purifying grey recovery, and not only transportation inconvenience purifies but also increased the cost that ash is recycled.

Utility model content

The purpose of this utility model is to provide a kind of and can directly carries the purification ash from calcium carbide production equipment, remove the existing process treatment process and the special purpose vehicle transportation that exist when ash reclaims of purifying from, the furnace of calcium carbide of directly realizing the recovery of furnace of calcium carbide purification ash purifies ash and returns stove combustion system, can reduce and purify the cost that ash is recycled, and the recycling to calcium carbide stove exhaust is more thorough, reach object energy-conservation, that reduce discharging.

The technical scheme in the invention for solving the technical problem is: a kind of furnace of calcium carbide purifies ash and returns stove combustion system, comprise the grey collecting bin of sealed purification of back taper, be used for powdery material strength carry transmitter, sealed blanking bin and be packed in star-like discharging device and the cyclone dust collectors on sealed blanking bin top, and carry source of the gas, mixed flow chamber; The grey collecting bin of described sealed purification is one or more; The discharging opening of the grey collecting bin of described each sealed purification bottom is connected with the entrance point that is positioned at described strength conveying transmitter top by a discharge nozzle one, airlock separately separately successively; On the grey collecting bin of described each sealed purification, be equipped with the air inlet being communicated with the grey collecting bin inner chamber of sealed purification in discharging opening upper end position place, each air inlet is connected with respectively a nitrogen carrier pipe two; Carry between transmitter upper end and establish respectively connecting pipeline in the upper end of the grey collecting bin of each sealed purification and described strength, described each connecting pipeline is communicated with the inner chamber of the grey collecting bin of each sealed purification respectively with the inner chamber of described strength conveying transmitter; Also include nitrogen carrier pipe one, described nitrogen carrier pipe one comprises the A of branch pipe in parallel and the B of branch pipe; Separate three pipelines in parallel by the described A of the branch pipe port of export, top, middle part and bottom that they are communicated to respectively described strength carries transmitter; The lower end outlet that described strength is carried transmitter to the left or right lateral bending extended in parallel certain overhang, and the described strength of the correspondence being separated by the described A of branch pipe carry transmitter bottom a parallel pipeline axially carry the axial consistent also corresponding of transmitter lower end outlet with strength; Described star-like discharging device and cyclone dust collectors are communicated with respectively the inner chamber of described sealed blanking bin, and described strength is carried between the outlet of transmitter lower end and the input port of described star-like discharging device and is connected by pneumatic carrier; The port of export of the described B of branch pipe is connected to one end place of the close described strength conveying transmitter of described pneumatic carrier; Described mixed flow chamber comprises left port, right output port and upper port; The lower end discharging opening of described sealed blanking bin is connected to the upper port of described mixed flow chamber by mass transport pipeline, and is also connected with mass flow regulon between mass transport pipeline and the upper port of mixed flow chamber; Described conveying source of the gas comprises top port and exhaust outlet, and the tube chamber of top port and the tube chamber of exhaust outlet mutually vertical; Between the blast pipe of described cyclone dust collectors upper end and the top port of described conveying source of the gas, be connected by return-air duct, the air-out form of described cyclone dust collectors is top air-out; The exhaust outlet of described conveying source of the gas connects the left port of described mixed flow chamber by gas pipeline, the right output port of described mixed flow chamber connects the charging aperture of discharge nozzle two, generally the discharge end of discharge nozzle two can be connected to combustion furnace; The left port of the exhaust outlet of described conveying source of the gas, described mixed flow chamber and right output port are connected to a horizontal linear.

Further, described sealed blanking bin comprises cylindrical section and the inverted conical body section that is positioned at this cylindrical section below, and the lower end reducing of cone section is discharging opening.

Further, also comprise control module; On the described A of branch pipe and the B of branch pipe, be respectively equipped with magnetic valve group A unit and magnetic valve group B unit, described control module is connected with described magnetic valve group A unit and magnetic valve group B unit respectively.

Further, the inner cavity surface of the cylindrical section of described sealed blanking bin and cone section is the helicoid being rotated down.

Further, the air inlet on the grey collecting bin of described sealed purification is the axial downward-sloping through hole uniform along periphery.

Further, described cyclone dust collectors comprise Whirlwind barrel, flue-dust retainer and spiral case; The Whirlwind barrel diameter of described cyclone dust collectors is not less than 55mm; The import of described cyclone dust collectors is scroll casing shape; The Whirlwind barrel of described cyclone dust collectors comprises cylindrical section and is positioned at the cone section on cylindrical section top, and the semi-cone angle of described cone section is positioned at the scope of 13 ° to 15 °.

Further, between described mass flow regulon and described mixed flow chamber upper port, be provided with air cavity; Described mass flow regulon lower end jet blower is Circular Plate, and its inner edge has crimping downwards; On described air cavity inner bottom surface, inner cone is set, the conical internal cavity of described inner cone be arranged vertically and flared end upwards; The center of described jet blower is corresponding with the center of described inner cone; The end of described crimping extends in described air cavity; The bore of described jet blower is not more than the bore of described inner cone flared end; The necking end of described inner cone is communicated with the upper port of described mixed flow chamber; On the sidewall of described air cavity, be provided with admission line, and admission line is corresponding to the upper end of described inner cone.

Further, be provided with circular jetting perforation on described inner cone, the axis of described spray-hole oliquely downward tilts.

Further, described inner cone inside is provided with separating device; On the inwall of described mixed flow chamber upper port, be provided with crash device.

The beneficial effects of the utility model are: the related furnace of calcium carbide of the utility model purifies ash and returns stove combustion system, can directly carry out site transport recovery to the purification ash from calcium carbide production equipment, overcome and purified the recovery that ash brings because of characteristics such as tool high temperature, inflammable and explosive, adhesions and carry difficult problem, realize site transport smooth and easy, without stopping up; The setting of sealed blanking bin can guarantee to feed the stable of purification in combustion furnace ash conveying capacity, guarantees the normal continuous operation of combustion furnace; In the time being combined with calcium carbide stove exhaust cleaning system, purify ash and directly pass into the combustion furnace in calcium carbide production by the utility model, no longer need to transport, purify thereby removed from the freight that ash is recycled, and purify the grey by-product such as calcified material, burning magnesium that is obtained having high added value after fully burning, improve the productivity effect of calcium carbide factory, improve the output value, increase profit income, obtained in addition energy-saving benefit, and realized the object of pollution reduction.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structure for amplifying schematic diagram of the grey collecting bin of sealed purification lower end nitrogen air inlet parts in the utility model;

Fig. 3 carries out the schematic diagram after structure optimization to mass flow regulon in the utility model and mixed flow chamber two parts;

In figure: the grey collecting bin of 1 sealed purification, 2 airlocks, 1-2 discharge nozzle one, 3 strengths are carried transmitter, 1-3 connecting pipeline, 4 nitrogen carrier pipes one, 41 A of branch pipes, 411 magnetic valve group A unit, 42 B of branch pipes, 421 magnetic valve group B unit, 5 nitrogen carrier pipes two, 6 control modules, 7 sealed blanking bins, 3-7 pneumatic carrier, 71 star-like discharging devices, 72 cyclone dust collectors, 8 carry source of the gas, 81 top port, 7-8 return-air duct, 9 mixed flow chambers, 8-9 gas pipeline, 91 crash devices, 9c discharge nozzle two, 10 mass flow regulons, 102 jet blowers, 102 air cavitys, 103 inner cones, 1031 jet blowers, 104 separating devices.

The specific embodiment

For ease of understanding technology contents of the present utility model, below in conjunction with accompanying drawing, it is described further.

In description of the present utility model, it should be noted that, term " on ", orientation or the position relationship of the indication such as D score, " left side ", " right side ", " top ", " end " " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than indicate or imply that the device of indication or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as restriction of the present utility model.

In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.

As shown in Figure 1, a kind of furnace of calcium carbide purifies ash and returns stove combustion system, comprise the grey collecting bin 1 of sealed purification of back taper, be used for powdery material strength carry transmitter 3, sealed blanking bin 7 and be packed in the star-like discharging device 71 and cyclone dust collectors 72 on sealed blanking bin 7 tops, and carry source of the gas 8, mixed flow chamber 9.

The grey collecting bin 1 of described sealed purification can be one or more.When use, the upper end charging aperture of the grey collecting bin 1 of each sealed purification respectively with calcium carbide stove exhaust purification recovery device in the purification ash outlet that unloads ash can (be loaded with purify ash) or independently purify grey collecting tank be tightly connected.Because each unloads ash can is intermittent delivery to the grey process of the grey collecting bin 1 supply purification of sealed purification, so mostly be being arranged in parallel of 3 to 6 grey collecting bins 1 of sealed purification in practical application, collect purifying grey multiple spot to realize, guarantee to purify the continuous non-interruptible supply of ash.

The discharging opening of the grey collecting bin of described each sealed purification 1 bottom is connected with the entrance point that is positioned at described strength conveying transmitter 3 tops separately by discharge nozzle one 1-2, airlock 2 separately successively.Described airlock 2 is called again rotary discharge valve or star-like discharging device, it rotates in circular casing by the rotor with several blades, (furnace of calcium carbide purifies ash to the material that will fall into from top hopper (being discharge nozzle one 1-2 the utility model), be referred to as below and purify ash), fill in interlobate space, along with blade rotary draws off to lower position.In strength is carried, airlock 2 can evenly and continuously be discharged the powder under pressure state or granular material, plays again sealing function, and in the separation of system, it can bring into play again the function of discharging.

On the grey collecting bin 1 of described each sealed purification, be equipped with the air inlet being communicated with grey collecting bin 1 inner chamber of sealed purification in discharging opening upper end position place, each air inlet is connected with respectively a nitrogen carrier pipe 25.Lower end by the grey collecting bin 1 of described sealed purification passes into nitrogen, is to consider to purify ash for high temperature (between 170 to 180 ℃), adhesion state and inflammable, explosive powdered form, is not easy to carry.And nitrogen not only can play the left and right to purifying ash cooling, but also play the effect of separation purifying ash and air, not only can slow down adhesion state, play the effect of protection gas simultaneously.

In order to strengthen purify that ash carries to strength that transmitter 3 carries by the grey collecting bin 1 of sealed purification smooth and easy, continuously and avoid stopping up, as shown in Figure 2, the air inlet on grey described sealed purification collecting bin 1 is made as to and axial downward-sloping manhole uniform along periphery.

As shown in Figure 1, carry between transmitter 3 upper ends and establish respectively connecting pipeline 1-3 in the upper end of the grey collecting bin 1 of each sealed purification and described strength, described each connecting pipeline 1-3 carries the inner chamber of transmitter 3 to be communicated with respectively the inner chamber of the grey collecting bin 1 of each sealed purification and described strength, guarantee chamber pressure balance, realize stable conveying, avoid refluxing.

The utility model also includes nitrogen carrier pipe 1, and described nitrogen carrier pipe 1 comprises the A of branch pipe 41 in parallel and the B of branch pipe 42.The port of export by the described A of branch pipe 41 separates three pipelines in parallel, top, middle part and bottom that they are communicated to respectively described strength carries transmitter 3.Carry top, the middle part of transmitter 3 to pass into nitrogen in described strength, further to realize cooling and buffer action, supercharging, raising purify grey transportation performance.

Described strength carries the lower end of transmitter 3 to be inverted taper, and the inner chamber of this section is also inverted conical internal cavity, and conical internal cavity lower end outlet (for convergent mouth structure) the bending and parallel certain length that extends to the right to the right.Separated by the described A of branch pipe 41, the axial and strength of a corresponding parallel pipeline carrying transmitter lower end in described strength is carried the axial consistent and corresponding of transmitter 3 outlet dextrad extensions, lower end.Described strength is carried between transmitter 3 lower end outlets and the input port of described star-like discharging device 71 and is connected by pneumatic carrier 3-7.The parallel pipeline that what the described A of branch pipe 41 separated be positioned at bottom axially carry transmitter 3 outlet dextrad extensions, lower ends with strengths axial consistent also corresponding be smooth and easy in order to ensure strength conveying transmitter 3 delivery port places, and form certain thrust, making can be with certain with the mixed purification ash of nitrogen, and fair speed enters described pneumatic carrier 3-7.

The port of export of the described B of branch pipe 42 is connected to one end place of the close described strength conveying transmitter 3 of described pneumatic carrier 3-7, increases discharge pressure.

The utility model also includes control module 6.And manage on 42 and be respectively equipped with magnetic valve group A unit 411 and magnetic valve group B unit 421 with the B of branch at the described A of branch pipe 41, described control module 6 is connected with described magnetic valve group A unit 411 and magnetic valve group B unit 421 respectively, realizes automatically and controlling.It will be appreciated that, as shown in Figure 1, manage 42 with the B of branch except the described A of branch pipe 41, on other all pipelines, be also provided with control valve or magnetic valve, certainly, also magnetic valve is set on other pipeline time, the magnetic valve at this place also should be able to be connected with control module 6, realizes automatically and controlling, and is the conventional means measure as the art, in to description of the present utility model, do not relate to, but it can not form restriction of the present utility model.

Described star-like discharging device 71 and cyclone dust collectors 72 are communicated with respectively the inner chamber of described sealed blanking bin 7.Described star-like discharging device 71 rotates in circular casing by the rotor with several blades, by the material of sending into from pneumatic carrier 3-7 (furnace of calcium carbide mixing with nitrogen purifies ash), fill in interlobate space, along with blade rotary is transported to delivery outlet position, its underpart and draws off.Powder under pressure state or granular material evenly and continuously can be discharged at star-like discharging device 71 described in strength conveying, play again sealing function, in the separation of system, bring into play the function of discharging.

Selected cyclone dust collectors 72 are made up of Whirlwind barrel, flue-dust retainer and spiral case (or collection blast cap) three parts, and air-out form is top air-out.Operation principle: cyclone dust collectors 72 are the difference to grit and gas (nitrogen) the centrifugal inertial force size that produces according to monotubular cyclonic air flow, and grit is separated with gas.Dust-contained airflow approximately enters Whirlwind barrel with 12 to 25m/s speed by air inlet pipe place, for the helical movement downwards between its outer cylinder and central blast pipe.Produce centrifugal inertial force walking back and forth in turning over journey, grit one direction is subject to the impact of air motion, and rotation therein declines; Other direction is subject to the effect of centrifugal force, approaches barrel gradually to external diffusion, and inwall final and outer cylinder is collided, and slides along inwall rotation, is collected in the ash discharging hole of central bottom, and discharges thus.Gas is little because of quality, is subject to centrifugal action very micro-, turns to the center of deduster with the contraction of conical cavity, and is subject to base drag effect, then rises, and forms one rising eddy flow, discharges from blast pipe upper end, realizes dustproof function.

Generally, the Whirlwind barrel diameter of cyclone dust collectors 72 is less, and the suffered centrifugal force of dust granules is larger, and the efficiency of dust collection of cyclone dust collectors 72 is also just higher.But too small barrel diameter can cause larger diameter particle likely to rebound and be pulled away to central gas stream, efficiency of dust collection is reduced.In addition, cylindrical shell is too little easily causes obstruction (and purification ash has certain viscosity) for viscous material.Therefore, the efficiency of dust collection and the mixed nitrogen that consider cyclone dust collectors 72 purify grey viscosity, the Whirlwind barrel diameter of cyclone dust collectors 72 are set as being not less than in the scope of 55mm in the utility model.If adopt the form that is arranged in parallel of 3 to 6 grey collecting bins 1 of sealed purification, consider multi-feedly, purify the increase of grey conveying capacity, easily the Whirlwind barrel diameter of cyclone dust collectors 72 is set in the scope of 60mm to 70mm.

The Whirlwind barrel part of described cyclone dust collectors 72 is divided into cylindrical section and is positioned at the cone section on cylindrical section top, the effect of cyclone dust collectors 72 cone sections (inner chamber is also taper) is that the dust particle of having separated is concentrated on to cyclone dust collector center, is stored up in ash bucket to arrange people.Certain when cone height, and cone angle is when larger, because air-flow eddy flow radius diminishes very soon, is easy to cause core air-flow and wall to clash into, make along the rotation of cone wall and under grit taken away by inward eddy, affect efficiency of dust collection.So the semi-cone angle of cone section is selected in the scope of 13 ° to 15 °

The import of described cyclone dust collectors 72 is scroll casing shape (being involute shape); The air-flow width that is entered people's Whirlwind barrel by involute (scroll casing shape) import narrows gradually, can reduce shock and the interference of air-flow to air-flow in cylindrical shell, the distance that particle moves to wall is reduced, and strengthen the distance of inlet gas and blast pipe, reduce the short circuit chance of air-flow, thereby improve efficiency of dust collection.This import formal layout is large-minded, and the pressure loss is little.

Described mixed flow chamber 9 comprises left port, right output port and upper port.

Described sealed blanking bin 7 comprises cylindrical section and the inverted conical body section that is positioned at this cylindrical section below, and the lower end reducing of cone section is discharging opening.The lower end discharging opening of described sealed blanking bin 7 is connected to the upper port of described mixed flow chamber 9 by mass transport pipeline, and between mass transport pipeline and the upper port of mixed flow chamber 9, be also connected with mass flow regulon 10, be used for controlling the mixed nitrogen of carrying and purify grey flow.For strengthening the feeding performance of sealed blanking bin 7, avoid occurring stopping up, easily the inner cavity surface of the cylindrical section of described sealed blanking bin 7 and cone section is all made as to the helicoid being rotated down.

Described conveying source of the gas 8 comprises top port 81 and exhaust outlet, and the tube chamber of top port 81 and the tube chamber of exhaust outlet mutually vertical.Mixed nitrogen purifies ash and is admitted to after described sealed blanking bin 7, be the dynamic-form of mixed flow air-flow, and sealed blanking bin has certain pressure in 7 storehouses, for balanced seal formula blanking bin 7 storehouse internal pressures, make pressure control within the specific limits, just need to be to a large amount of nitrogen that constantly pass into (because nitrogen not only plays cooling effect in whole system, also as the use of conveying gas, so intake is very large) control discharge, the setting of described cyclone dust collectors 72 is to realize this object, realize the control of nitrogen and discharge, guarantee voltage stabilizing in storehouse.In addition, be to recycle the nitrogen of discharging, make to be connected by return-air duct 7-8 between the blast pipe of described cyclone dust collectors 72 upper ends and the top port 81 of described conveying source of the gas 8.

Carry the discharge pressure supplier that source of the gas 8 is terminal.The exhaust outlet of described conveying source of the gas 8 connects the left port of described mixed flow chamber 9 by gas pipeline 8-9, the right output port of described mixed flow chamber 9 connects discharge nozzle two 9c.The left port of the exhaust outlet of described conveying source of the gas 8, described mixed flow chamber 9 and right output port are connected to a horizontal linear, the high-pressure that described like this conveying source of the gas 8 acts on just can farthest act on and enter the interior mixed nitrogen purification ash in mixed flow chamber 9 above, makes mixed nitrogen purify at a high speed grey and be transferred away by pneumatic carrier 3-7 glibly.When use, the gas outlet of described discharge nozzle two 9c can be communicated with the combustion bin that calcium carbide is produced, and the purification ash of recovery is made to fuel and use (purifying the loss on ignition of ash containing 30% left and right of having an appointment).Because purifying ash includes 40% the CaO(of having an appointment and is trickle granular) and approximately 9% MgO(be trickle granular), after purifications ash being passed into combustion furnace and burning, can obtain the high value-added product such as calcium and burning magnesium.Process so the purification ash obtaining in calcium carbide production process is directly returned to stove burning, not only can remove the industrial application cost that purifies ash transportation and process from, but also can bring the byproduct with high added value.By use of the present utility model, not only make calcium carbide produce energy-conserving and environment-protective more (purification ash can serve as approximately 40% left and right, the crude fuel normally using in calcium carbide is produced), and greatly improved the economic benefit that calcium carbide is produced.

Grey sealed purification collecting bin 1 is sent into described strength and carry the purification ash of transmitter 3 first to send in sealed blanking bin 7, then sending into combustion furnace recovery burning, rather than directly carry transmitter 3 to send into combustion furnace by strength and reclaim burning.Be because the grey collecting bin 1 of sealed purification carries the interior conveying of transmitter 3 to purify the digital process that grey process is an intermittence to strength, and the burning of combustion furnace to keep continous-stable, can not be subject to the unsettled impact of fuel feed.The effect that is sealed blanking bin 7 is voltage stabilizing stable, the supply continuously of guaranteeing to purify ash.

It will be appreciated that, the discharge end of described discharge nozzle two 9c is not to be only defined as a discharging opening, and the discharge end of described discharge nozzle two 9c can be 2 above multiple discharging openings, and each discharging opening is be arranged in parallel and be communicated with respectively different combustion furnaces.According to the different of the number of the discharging opening of described discharge nozzle two 9c or change, by described mass flow regulon 10, realize and carried mixed nitrogen to purify the adjusting of grey flow by described sealed blanking bin 7 to described mixed flow chamber 9, with the balance that keeps supplying with, stable.

As shown in Figure 3, between described mass flow regulon 10 and described mixed flow chamber 9 upper port, be provided with air cavity 102.The jet blower 101 of mass flow regulon 10 lower ends is Circular Plate, and jet blower 101 inner edges have crimping downwards, and crimping can guarantee that mixed nitrogen purifies flowing out completely and smoothly of ash.On described air cavity 102 inner bottom surfaces, inner cone 103 is set, the conical internal cavity of described inner cone 103 be arranged vertically and flared end upwards.Described jet blower 101 center is corresponding with described inner cone 103 center, and the end of described crimping extends in described gas 102, and the bore of described jet blower 101 is not more than the bore of described inner cone 103 flared end.The necking end of described inner cone 103 is communicated with the upper port of described mixed flow chamber 9.On the sidewall of described air cavity 102, be provided with admission line, and admission line is corresponding to the upper end of described inner cone 103, preferably guarantees that the axle center of admission line is positioned at inner cone 103 upper port belows.Fuel gas by admission line to what pass in described air cavity 102, object is to increase to purify grey combustion characteristics, and can utilize the grey temperature of purification to the fuel gas preheating passing into, increase the combustion characteristics of fuel gas, be that fuel gas mutually promotes to increase flammability separately with purification ash, guarantee fully to be burnt respectively separately, use so further improved the environmental benefit, the energy-saving benefit that after the utility model, bring.

Purify grey mixing uniformity for further increasing the fuel gas and the air-flow state that pass into, to strengthen combustibility separately, on described inner cone 103, be provided with circular spray-hole 1031, and the axis in described injection 1031 holes oliquely downward tilts.

After mixed nitrogen purification ash flows to air cavity 102, the combustible gas being passed into by the admission line on air cavity 102 right sides is known from experience the mixed nitrogen of side contacts from inner cone 103 and is purified ash, simultaneously, also have part fuel gas to enter in inner cone 103 from spray-hole 1031, now, the fuel gas of coming in has and dispels mixed nitrogen and purify grey effect, and can make mixed nitrogen purify ash can contact with fuel gas more fully.

Further again, described inner cone 103 inside are provided with separating device 104; On the inwall of described mixed flow chamber 9 upper port, be provided with crash device 91.When mixed nitrogen purify ash enter inner cone 103 interior after, can run into separating device 104.Separating device 104 can purify ash ring the mixed nitrogen flowing and be separated into several parts, can better allow so mixed nitrogen purify ash and contact with fuel gas.When feed liquid enters behind mixed flow chamber 9 by inner cone 103, also can run into crash device 91 crash devices 91 and have spring, so can beat along with mixed nitrogen purifies grey impact, mixed nitrogen can be purified to ash partly pops up again, make it again to contact with fuel gas, further disperse nitrogen to purify ash, thereby increased contact area, strengthen microturbulence, improved mixed effect.Separating device 104 and crash device 91 jointly play and disperse to purify ash, increase fuel gas contact-making surface, microturbulence effect between strengthened purification ash and fuel gas, the mutual collision that promotes to purify between ash and fuel gas disperses, and then improves the mixing efficiency of the two.It will be appreciated that, in the time that air cavity 102, inner cone 103 and separating device 104 are not set, crash device 91 still can be set on described mixed flow chamber 9, object is to strengthen mixed nitrogen to purify grey turbulent flow, and further disperse, the mixed nitrogen of refinement purifies grey particle, improves flammability.

The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.

Claims (10)

1. furnace of calcium carbide purifies ash and returns a stove combustion system, it is characterized in that:

Comprise the grey collecting bin of sealed purification of back taper, be used for the strength of powdery material to carry transmitter, sealed blanking bin and be packed in star-like discharging device and the cyclone dust collectors on sealed blanking bin top, and carry source of the gas, mixed flow chamber;

The grey collecting bin of described sealed purification is one or more;

The discharging opening of the grey collecting bin of described each sealed purification bottom is connected with the entrance point that is positioned at described strength conveying transmitter top by a discharge nozzle one, airlock separately separately successively;

On the grey collecting bin of described each sealed purification, be equipped with the air inlet being communicated with the grey collecting bin inner chamber of sealed purification in discharging opening upper end position place, each air inlet is connected with respectively a nitrogen carrier pipe two;

Carry between transmitter upper end and establish respectively connecting pipeline in the upper end of the grey collecting bin of each sealed purification and described strength, described each connecting pipeline is communicated with the inner chamber of the grey collecting bin of each sealed purification respectively with the inner chamber of described strength conveying transmitter;

Also include nitrogen carrier pipe one;

Described nitrogen carrier pipe one comprises the A of branch pipe in parallel and the B of branch pipe;

Separate three pipelines in parallel by the described A of the branch pipe port of export, top, middle part and bottom that they are communicated to respectively described strength carries transmitter;

The lower end outlet that described strength is carried transmitter to the left or right lateral bending horizontal-extending have certain overhang, and

Separated by the described A of branch pipe, a corresponding parallel pipeline carrying transmitter bottom in described strength axially, carry the axial consistent also corresponding of transmitter lower end outlet with described strength;

Described star-like discharging device and cyclone dust collectors are communicated with respectively the inner chamber of described sealed blanking bin;

Described strength is carried between the outlet of transmitter lower end and the input port of described star-like discharging device and is connected by pneumatic carrier;

The port of export of the described B of branch pipe is connected to described pneumatic carrier, carries one end place of transmitter near described strength;

Described mixed flow chamber comprises left port, right output port and upper port;

The lower end discharging opening of described sealed blanking bin is connected to the upper port of described mixed flow chamber by mass transport pipeline, and is also connected with mass flow regulon between mass transport pipeline and the upper port of mixed flow chamber;

Described conveying source of the gas comprises top port and exhaust outlet, and the tube chamber of top port and the tube chamber of exhaust outlet mutually vertical;

Between the blast pipe of described cyclone dust collectors upper end and the top port of described conveying source of the gas, be connected by return-air duct;

The exhaust outlet of described conveying source of the gas connects the left port of described mixed flow chamber by gas pipeline, the right output port of described mixed flow chamber connects the charging aperture of discharge nozzle two;

The left port of the exhaust outlet of described conveying source of the gas, described mixed flow chamber and right output port are connected to a horizontal linear.

2. furnace of calcium carbide according to claim 1 purifies ash and returns stove combustion system, it is characterized in that: described sealed blanking bin comprises cylindrical section and the inverted conical body section that is positioned at this cylindrical section below, and the lower end reducing of cone section is discharging opening.

3. furnace of calcium carbide according to claim 1 and 2 purifies ash and returns stove combustion system, it is characterized in that: also comprise control module; On the described A of branch pipe and the B of branch pipe, be respectively equipped with magnetic valve group A unit and magnetic valve group B unit, described control module is connected with described magnetic valve group A unit and magnetic valve group B unit respectively.

4. furnace of calcium carbide according to claim 2 purifies ash and returns stove combustion system, it is characterized in that: the inner cavity surface of the cylindrical section of described sealed blanking bin and cone section is the helicoid being rotated down.

5. furnace of calcium carbide according to claim 1 purifies ash and returns stove combustion system, it is characterized in that: the air inlet on the grey collecting bin of described sealed purification is the axial downward-sloping through hole uniform along periphery.

6. furnace of calcium carbide according to claim 1 purifies ash and returns stove combustion system, it is characterized in that:

Described cyclone dust collectors comprise Whirlwind barrel, flue-dust retainer and spiral case, and air-out form is top air-out;

The Whirlwind barrel diameter of described cyclone dust collectors is not less than 55mm; The import of described cyclone dust collectors is scroll casing shape;

The Whirlwind barrel of described cyclone dust collectors comprises cylindrical section and is positioned at the cone section on cylindrical section top, and the semi-cone angle of described cone section is 13 ° to 15 °.

7. purify ash according to the furnace of calcium carbide described in claim 1 or 2 or 4 or 5 or 6 and return stove combustion system, it is characterized in that:

Between described mass flow regulon and described mixed flow chamber upper port, be provided with air cavity;

The jet blower of mass flow regulon lower end is Circular Plate, and its inner edge has crimping downwards;

On described air cavity inner bottom surface, inner cone is set, the conical internal cavity of described inner cone be arranged vertically and flared end upwards;

The center of described jet blower is corresponding with the center of described inner cone;

The end of described crimping extends in described air cavity;

The bore of described jet blower is not more than the bore of described inner cone flared end;

The necking end of described inner cone is communicated with the upper port of described mixed flow chamber;

On the sidewall of described air cavity, be provided with admission line, and admission line is corresponding to the upper end of described inner cone.

8. furnace of calcium carbide according to claim 7 purifies ash and returns stove combustion system, it is characterized in that: on described inner cone, be provided with circular jetting perforation, the axis of described spray-hole oliquely downward tilts.

9. furnace of calcium carbide according to claim 7 purifies ash and returns stove combustion system, it is characterized in that: described inner cone inside is provided with separating device; On the inwall of described mixed flow chamber upper port, be provided with crash device.

10. furnace of calcium carbide according to claim 7 purifies ash and returns stove combustion system, it is characterized in that: also comprise control module; On the described A of branch pipe and the B of branch pipe, be respectively equipped with magnetic valve group A unit and magnetic valve group B unit, described control module is connected with described magnetic valve group A unit and magnetic valve group B unit respectively.

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