CN209302439U - A kind of calcining furnace exhaust dust-removing system - Google Patents

Abstract

The utility model relates to a kind of calcining furnace exhaust dust-removing systems comprising cyclone dust collectors, cyclone dust collectors shell are insulating layer.Cyclone dust collectors one end connects the exhaust outlet of calcining furnace, and the other end connects sediment box；The gas outlet of sediment box connects blower by piping connection eluting column, eluting column air outlet.Using the utility model structure, gas its 90% or more the raw material dust taken out of being discharged out of furnace is captured in cyclone dust collectors, and the dust of remaining part material dusty gas is successively deposited device and collects.Gas keeps high temperature not will form condensed water in the cyclone dust collectors of this system, and the dust of collection is dry powder, can directly recycle calcining again and utilize, and will not generate paste in collector, will not block gas piping, reduce and avoid the blowing out of equipment to clear up.Further, since the Dust Capacity collected in the settler at rear portion is less, calcining furnace normal use will not be influenced for a long time by not clearing up.

Description

A kind of calcining furnace exhaust dust-removing system

Technical field

The utility model relates to a kind of calcining furnace exhaust dust-removing systems.

Background technique

It is heated by the ammonium paratungstate raw material powder of rotary calcining furnace boiler tube after decompositing ammonia and water after calcining and obtains oxygen Change tungsten product, is up to the ammonia of 28kg per hour in calcining and water generates in a gaseous form, need quantitative discharge boiler tube, with The reaction atmosphere in furnace is maintained, simultaneously because sodium paratungstate and tungsten oxide are all the solid powders of micron particle size, discharge is a large amount of Powder can be taken together out of boiler tube when gas, this just needs cleaner to separate powder and gas, collected powder Calcining utilizes again at end, and the oxidation tungsten product calcined out again by the collected powder of cleaner is made a price reduction usually as substandard products It sells.

Patent name: patent publication No. CN101347698 recycles tungsten oxide powder dust from flue gas of calcining ammonium paratungstate Method and recyclable device, content are as follows: as shown in Figure 1 calcining furnace 11, pulsed jet cloth filter 13, between air-introduced machine 14 with taking out Air hose concatenation extracts the gas that generates in calcining furnace by air-introduced machine, bag filter resistant to high temperature by gas and dust separation, The Hand-operated butterfly valve 12 concatenated between pulsed jet cloth filter and calcining furnace is for adjusting sucking rate size.

The compressed air blowback vibration that this exhaust dust-removing mode needs to consume about upper hectostere per hour is fallen on filter cloth The compressed air of dust, blowback consumption has fully entered in the gas exhaust piping of stove, general compressed air gas source pressure 0.4MPa, And operating pressure only has several hundred pas in calcining furnace, pressure is much higher than furnace pressure when due to compressed air blowback, and compressed air will Flow backward into boiler tube, primary compressed air pulsating back-blowing makes ammonia, vapour pressure and concentration in boiler tube always within every tens seconds In fluctuation, should the oven cavity atmosphere of negative-pressure reduction atmosphere positive pressure oxidizing atmosphere is in compressed air blowback, this will certainly The quality of product is impacted, while the compressed air moment of blowback, to pour in the raw material that can be raised in boiler tube in calcining furnace thin Powder, the fine powder raised can enter bag filter with exhausting, caused by gather dust and expect more, the casting yield of product is lower than 98%.

Due to the gas flow generated in furnace be not it is constant, pulsed jet cloth filter due to dust accumulation generate to exhausting Resistance be also gradually increased, so cause the unstable of sucking rate, also will affect the stabilization of calcining furnace pressure, to product Quality impacts.

The gas that this kind of dedusting method extracts reduces the temperature of the vapor extracted out in furnace due to being mixed into for cold compression air Degree, forms condensed water inside pulsed jet cloth filter and on air draft pipe, powder and condensed water are mixed into the stifled of paste deposition Plug thing, this needs the blocking powder in often cleaning pipeline and bag filter, the agglomerating dress of paste powder drying cleaned out, Utilization can just be calcined again by being broken into after powder.

Industry 21 exhaust duster of calcining furnace that there are also a kind of such as Fig. 2 structure type at present, using jet pump 22 from furnace The exhaust outlet of son forms tiny structure, drives furnace gas to isolate part dust to sediment box 27, a small amount of dust is by jet pump 22 It is deposited on after elution in water tank 26.The negative pressure that jet pump 22 is formed depends on the size of 25 water supply flow of water pump, by adjusting water The by-passing valve 24 and the adjustable water pump water supply flow of throttle valve 23 of 25 outlet of pump.

This mode the problem is that after long-play water pump leaked due to caused by mechanical wear, furnace gas it is miscellaneous Matter causes the reasons such as density, the viscosity change of water influence flow non-constant after being dissolved in water, therefore the negative pressure that jet pump is formed is unstable It is fixed, once calcination atmosphere will change in the larger furnace of pressure deviation, cause the product quality of calcining unqualified, this needs people Work often adjusts the outlet pressure of water pump.

This dedusting method extracts the mixed gas containing higher concentration vapor, when passing through sediment box, due to sediment box Body is larger, and gas flow velocity in sediment box can be cooled into condensed water more slowly, and a large amount of powders and condensed water under depositing are mixed into Paste, this also needs often to clean out powder paste and dry agglomerating dress, can just calcine again after being broken into powder It utilizes.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of calcining furnace exhaust dust-removing systems, for recycling powder End, the material that gathers dust can directly calcine utilization without being dried again.Another purpose of the utility model is to ensure calcining Stable gas pressure in furnace maintains reaction in furnace atmosphere to stablize, and improves the quality of product, reduces the material that gathers dust generated in calcining, mentions High product casting yield；

The utility model is in order to solve the above technical problems, its technical solution is described below: it includes cyclone dust collectors；Whirlwind Deduster one end connects the exhaust outlet of calcining furnace, and the other end connects sediment box；The gas outlet of sediment box is eluted by piping connection Tower, eluting column air outlet connect blower；The cyclone dust collectors shell is insulating layer.

Above-mentioned calcining furnace exhaust dust-removing system, cyclone dust collectors, sediment box, eluting column, eluting column form furnace by pipeline The export channel of interior gas；The air-extraction function of blower makes to form negative pressure in calcining furnace, drives furnace gas to pass sequentially through exhaust and removes The pipeline and equipment of dirt system.Its 90% or more raw material dust taken out of of the gas being discharged out of furnace is caught in cyclone dust collectors Collection, remaining part material dusty gas is due to Diffusion of gas stream when by sediment box, and flow velocity in sediment box slowly and under depositing Come, remaining micro dusty gas passes through the water elution dedusting of eluting column again.This system is protected since the shell of cyclone dust collectors is arranged Warm layer such as lays thermal insulation material, or shell is arranged to the insulating layer of sandwich, and due to the gas stream in cyclone dust collectors Fast very fast, gas keeps high temperature not will form condensed water in cyclone dust collectors, and the dust of collection is dry powder, can directly recycle Calcining utilizes again, and paste will not be generated in collector, will not block gas piping, reduce and avoid stopping for equipment Furnace cleaning.Further, since its 90% or more raw material dust of the gas being discharged out of furnace is captured in cyclone dust collectors, thus The Dust Capacity collected in the settler at rear portion is less, and calcining furnace normal use will not be influenced for a long time by not clearing up.

A further improvement is that sedimentation basin is arranged in the eluting column lower part, and it moreover further include circulating pump, circulation It pumps one end and connects sedimentation basin, the other end connects the water inlet of eluting column.Above structure is conducive to collect the micronic dust in eluting column, special It is not the recycling and reusing for realizing shower water, energy conservation and environmental protection.

The calcining furnace exhaust dust-removing system, further includes pressure sensor, PID controller, regulating valve；The pressure passes Sensor is arranged in furnace, and the regulating valve is arranged on the pipeline between the gas outlet of sediment box and eluting column, pressure sensor It is electrically connected PID controller, PID controller is electrically connected regulating valve.Negative pressure in calcining furnace depends on inlet chamber flow and furnace The size of the gas flow generated when interior calcining can adjust the flow of exhaust outlet by above structure in time, facilitate in control furnace Pressure.Pressure sensor, which detects the variation of the pressure in furnace and generates electric signal, feeds back to PID controller, and PID controller is pressed According to P, I, D value processing pressure electric signal of adjusting, then the aperture that analog quantity continuously adjusts regulating valve is exported, when furnace pressure is higher than After the operation pressure of PID setting, the aperture of PID control regulating valve increases, and increases the capacity in calcining furnace；Work as furnace pressure After operation pressure lower than PID setting, the aperture of PID control regulating valve reduces, and reduces the capacity of calcining furnace, calcines in this way The available effective control of pressure and adjusting in furnace, reaction in furnace atmosphere maintain continuous-stable, generate in reduction calcining Gather dust material, improves product casting yield.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the prior art 1；

Fig. 2 is the structural schematic diagram of the prior art 2；

Fig. 3 is the structural schematic diagram of the utility model embodiment.

Specific embodiment

The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical It is novel, it is not intended to limit the scope of the utility model.

1 exhaust dust-removing system of calcining furnace as shown in Fig. 3 comprising cyclone dust collectors 3, eluting column 6, sink at sediment box 4 Shallow lake pond 9, circulating pump 8, blower 7, pressure sensor 2, regulating valve 5, PID controller；Pressure sensor is arranged in calcining furnace, adjusts Section valve is arranged on the pipeline between the gas outlet of sediment box and eluting column, and pressure sensor is electrically connected PID controller, PID control Device processed is electrically connected regulating valve；The shell of cyclone dust collectors is set as the insulating layer of sandwich, and the connection of cyclone dust collectors one end is forged The exhaust outlet of furnace is burnt, the other end connects sediment box；The gas outlet of sediment box is connected by piping connection eluting column, eluting column air outlet It gives a dinner for a visitor from afar machine one end, the blower other end is connect with ammonia exhaust system is sent.The leakage fluid dram of eluting column passes through the precipitating of piping connection lower part Pond, the water in sedimentation basin are again fed to eluting column elution by circulating pump after precipitating clarification and are recycled.

The utility model embodiment has the advantages that

1. the utility model continuously adjusts furnace pressure, final furnace pressure using pressure-PI- flow closed-loop control system Undulated control preferably maintains the stabilization of reaction in furnace atmosphere within the scope of ± 50Pa, realizes the matter of product in calcining furnace Amount is controllable, and product first-time qualification rate has been increased to 98% from traditional 95%.

2. the gas flow excluded in the control calcining furnace for the gas exhaust inspecting mode continuously smooth that the utility model uses, therefore The gas flow being discharged in furnace is uniform, avoids rotary calcining furnace manual flow and adjusts or press empty blowback bring flow to increase suddenly Big and take away more powder, therefore to be vented the Dust Capacity taken out of less for the powder in calcining furnace, product casting yield is from 98% It has been increased to 99.26%.

90% or more for capturing and being escaped in calcining furnace 3. the utility model is gathered dust using cyclone dust collectors as the first order Dust, cyclone dust collectors shell heat preservation and by gas flow rate therein it is very fast, not will form condensed water, the dust of collection is Dry powder can directly calcine utilization again, reduce to gather dust and expect processing cost without being dried.

The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model Within the scope of shield.

Claims (5)

1. a kind of calcining furnace exhaust dust-removing system, it is characterised in that: further include cyclone dust collectors, cyclone dust collectors shell is provided with Insulating layer；Cyclone dust collectors one end connects the exhaust outlet of calcining furnace, and the other end connects sediment box；The gas outlet of sediment box passes through pipe Road connects eluting column, and eluting column air outlet connects blower；The exhaust outlet of the calcining furnace connects cyclone dust collectors；Cyclone dust collectors Outlet pipe connect sediment box, the gas outlet of sediment box connects blower by piping connection eluting column, eluting column air outlet.

2. calcining furnace exhaust dust-removing system according to claim 1, it is characterised in that: the cyclone dust collectors shell is folder Layer insulating layer.

3. calcining furnace exhaust dust-removing system according to claim 1 or 2, it is characterised in that: the eluting column lower part setting Sedimentation basin.

4. calcining furnace exhaust dust-removing system according to claim 3, it is characterised in that: further include circulating pump, circulating pump one End connection sedimentation basin, the other end connect the water inlet of eluting column.

5. calcining furnace exhaust dust-removing system according to claim 1, it is characterised in that: further include pressure sensor, PID control Device processed, regulating valve；The pressure sensor is arranged in furnace, the regulating valve be arranged in sediment box gas outlet and eluting column it Between pipeline on, pressure sensor be electrically connected PID controller, PID controller be electrically connected regulating valve.