CN2423491Y

CN2423491Y - Bouderizing waste liquor roasting drying furnace

Info

Publication number: CN2423491Y
Application number: CN 00220467
Authority: CN
Inventors: 丁建业
Original assignee: Changzhou City No2 Drying Equipment Factory
Current assignee: Changzhou City No2 Drying Equipment Factory
Priority date: 2000-05-26
Filing date: 2000-05-26
Publication date: 2001-03-14
Anticipated expiration: 2010-05-26

Abstract

The utility model relates to a phosphatization waste liquor roasting drying furnace, which comprises a drying tower, a roasting furnace, a hot air furnace, a cyclone separator, a double stage gravity hammer discharging device, a discharging device, a water bath cooler and a steam separator. The utility model not only solves the problem of the discharging of phosphatization (passivation) waste liquor, but also accords with the requirement of environmental protection, and simultaneously, recovered materials can be utilized renewedly.

Description

Etching waste liquor roasting drying oven

The utility model relates to the environment protection equipment field, particularly relates to the roasting drying oven of a kind of processing phosphatization (passivation) waste liquid.

Development along with electronics industry and steel and iron industry, use amount for the phosphatization liquid of the passivating solution of the cathode shield of electronics, computer circuitry plate, computer, picture tube and high-carbon high-quality steel increases day by day, and the discharging of the phosphatization after the use (passivation) waste liquid will cause great environmental pollution.China then adopts the method in precipitation seepage method or replacing phosphatization pond to handle to the processing of phosphatization (passivation) waste liquid at present, and the processing method of this passiveness is not only brought pollution to underground water source, and its residue pollutant still exists simultaneously.

To be that design is a kind of can handle effectively that phosphatization (passivation) waste liquid makes it compliance with environmental protection requirements and to handling the etching waste liquor roasting drying oven that afterproduct utilizes again to the purpose of this utility model.

Technical solutions of the utility model are as follows: etching waste liquor roasting drying oven, has a drying tower, the drying tower bottom is provided with roaster, equidistantly on the sidewall of roasting furnace be provided with at least three pressure-air spray guns, roasting furnace connects with the hot-blast stove that has burner by hot-air inlet pipe, the drying tower top connects cyclone separator by induced duct, cyclone separator connects discharger by twin-stage twin-stage gravity drop hammer discharger, cyclone separator connects aerial cooler by the induced duct on top, the aerial cooler lower end connects with the water-bath cooler, and a side of water-bath cooler connects with steam-water separator.

On the basis of such scheme, for improving separative efficiency, described cyclone separator has two, what connect with drying tower is primary cyclone, primary cyclone connects with secondary cyclone by induced duct, and secondary cyclone connects with aerial cooler by induced duct, corresponding, twin-stage gravity drop hammer discharger is provided with two and connects with two cyclone separators respectively, and its lower end outlet is all stretched in the discharger.

By aforementioned schemes, aerial cooler has at least three group air heat exchangers and the blower fan of air is provided.

The water-bath cooler that connects with aerial cooler comprises a water-bath Venturi tube and the wet dust collector that connects with it, and water-bath Venturi tube top has at least two water pistols, and wet dust collector connects with aforesaid steam-water separator by the Fang Jing pipe.

Be the ejection efficiency of performance pressure-air spray gun, described pressure-air spray gun on the roasting tower side wall be arranged as with roasting tower axis angle be 45-60 °, be preferably 50 °.

By aforesaid etching waste liquor roasting drying oven, for ease of observing material, be provided with level detector in the lower sidewalls of wet dust collector and steam-water separator.

By aforesaid etching waste liquor roasting drying oven, for ease of repairing, be provided with in the lower sidewalls of top, wet dust collector and the steam-water separator of drying tower and repair import and export.

Contain composition 45-55% such as iron oxide, ferric trichloride and nickel in phosphatization (passivation) waste liquid, contain concentration simultaneously and be about 30% heavy corrosion material hydrochloric acid 20%, by the roasting drying, make the water evaporates in the waste liquid, through pyroreaction, make the compositions such as iron oxide, ferric trichloride and nickel that contain in the waste liquid become powder, reclaim, make aforementioned granular material can be used for fine chemical material through cyclonic separation, dedusting; In the roasting dry run, the hydrochloric acid atomizing in the waste liquid through the air cooling, makes the acid mist condensation, and hydrochloric acid that again will be purer is recycled.The utility model has not only solved the emission problem of phosphatization (passivation) waste liquid and has made it compliance with environmental protection requirements after implementing, and the material of recovery is utilized again, has good social benefit and economic benefit.

Below in conjunction with accompanying drawing in detail embodiment of the present utility model is described in detail:

Fig. 1 is the structural representation of embodiment;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is Fig. 1 mesohigh air gun location drawing;

Fig. 4 is a cyclone separator cutting air intake schematic diagram among Fig. 1;

Fig. 5 is a twin-stage gravity drop hammer sealing schematic diagram among Fig. 1;

Fig. 6 is an air heat exchanger schematic diagram among Fig. 1;

Fig. 7 is the connection layout of water-bath cooler among Fig. 1;

Drying tower 1 bottom connects roaster 2, equidistantly on the sidewall of roasting furnace 2 is provided with the pressure-air spray gun 21 that three injection airs are used, and pressure-air spray gun 21 is 50 ° with roasting tower 2 axis angles.Roasting furnace 2 connects with the hot-blast stove 3 that has burner 31 by hot-air inlet pipe 22, drying tower 1 top connects primary cyclone 51 by induced duct 4, primary cyclone 51 connects with secondary cyclone 52 by induced duct 4, two cyclone separators have respectively one with main body pipe oblique tangent and the cutting blast pipe 511, the cutting blast pipe 521 that communicate, also have a discharge pipe that connects with the back segment induced duct 512 and a discharge pipe 522 respectively.Two cyclone separators are connected with a twin-stage gravity drop hammer discharger 6 separately, twin-stage gravity drop hammer discharger 6 has an one-level discharging opening 61 that connects with the cyclone separator bottom above it, have the activity closure plate and seal the one-level gravity drop hammer 62 of one-level discharging opening 61, twin-stage gravity drop hammer discharger 6 bottoms are stretched into the secondary discharge port 63 in the discharger 7 and are had the one-level gravity drop hammer 64 that the activity closure plate is sealed secondary discharge port 63, the lower end of two twin-stage gravity drop hammer dischargers 6 connects and stretches in the discharger 7, secondary cyclone 52 connects aerial cooler 8 by the induced duct 4 on top, and aerial cooler 8 has three groups of air heat exchangers 81 and provides the blower fan 82 of exchange of air for it.Aerial cooler 8 lower ends connect with wet dust collector 92 with water-bath Venturi tube 91 water-bath Venturi tubes 91 lower ends of water-bath cooler 9, and the top of water-bath Venturi tube 91 is provided with two water pistols 911.One side of water-bath cooler 92 connects with steam-water separator 10 by Fang Jing pipe 101.For ease of observing material, be provided with level detector 20 at the bottom sidewall of wet dust collector 92 and steam-water separator 10.For ease of repairing, on the top of drying tower 1, the bottom sidewall of wet dust collector 92 and steam-water separator 10 is provided with to repair and imports and exports 30.

For ease of understanding present embodiment, the course of work below in conjunction with the description of drawings present embodiment: earlier phosphatization (passivation) waste liquid is placed in the roaster 2, hot-air inlet pipe 22 will be fed in the roaster 2 by the high-temperature hot air in the burner 31 burning back hot-blast stoves 3, three pressure-air spray guns 21 are with in the pressure-air directive roaster 2 simultaneously, make roaster 2 interior waste liquids be in the high-boiling state, make water evaporates, hydrochloric acid atomizes and is combined into vaporific HCL gas with water vapour, and make iron oxide contained in the waste liquid, ferric trichlorides etc. become solid powder particles and drive and steam because of hot-air, vaporific HCL gas is by drying tower 1, induced duct 4, manage into primary cyclone 51 with swirling eddy through cutting blast pipe 511, in the air-flow rotary course, solid powder particles fall and the one-level discharging opening 61 that is deposited in twin-stage gravity drop hammer discharger 6 to reaching constant weight, under one-level gravity drop hammer 62 drives, open closure plate and fall to secondary discharge port place 63, open closure plate through secondary gravity drop hammer 64 again and fall to discharger 7 dischargings, promptly be recovered to the powdery iron oxide, fine chemical materials such as ferric trichloride.It is up and carry out solid and gas at secondary cyclone 52 again through discharge pipe 512, induced duct 4 and separate with heat that the swirling eddy band remaining material, and the solid, powdery thing is by discharger 7 dischargings.From the air-flow that secondary cyclone 52 comes out, contain air, water vapour, vaporific HCL gas, small amount of solid dust this moment, enter aerial cooler 8 by induced duct 4 again, this moment, vaporific HCL gas began condensation, again when water-bath cooler 9, the current that two water pistols 911 on water-bath Venturi tube 91 tops eject bring to the bottom of wet dust collector 92 with the solid dust in the gaseous mixture, form sub-fraction hydrochloric acid simultaneously and also are sink to wet dust collector 92 bottoms.Remaining air-flow classical prescription is directly managed 101 and is entered steam-water separator 10, and at this, air, water vapour are discharged from steam-water separator 10 tops, and water and vaporific HCL gas formation hydrochloric acid are deposited on its bottom, and this part hydrochloric acid can be recycled.

Claims

1, etching waste liquor roasting drying oven, has a drying tower, the drying tower bottom is provided with roaster, roasting furnace connects with the hot-blast stove that has burner by hot-air inlet pipe, it is characterized in that: equidistantly on the sidewall of roasting furnace be provided with at least three pressure-air spray guns, the drying tower top connects cyclone separator by induced duct, cyclone separator connects discharger by twin-stage twin-stage gravity drop hammer discharger, cyclone separator connects aerial cooler by the induced duct on top, the aerial cooler lower end connects with the water-bath cooler, and a side of water-bath cooler connects with steam-water separator.

2, etching waste liquor roasting drying oven according to claim 1, it is characterized in that: described cyclone separator has two, what connect with drying tower is primary cyclone, primary cyclone connects with secondary cyclone by induced duct, secondary cyclone connects with aerial cooler by induced duct, two cyclone separators have respectively one with the oblique tangent and cutting blast pipe that communicates of main body pipe, the cutting blast pipe, also have a discharge pipe and a discharge pipe that connects with the back segment induced duct respectively, corresponding, twin-stage gravity drop hammer discharger is provided with two and connects with two cyclone separators respectively, twin-stage gravity drop hammer discharger has an one-level discharging opening that connects with the cyclone separator bottom above it, have the activity closure plate and seal the one-level gravity drop hammer of one-level discharging opening, twin-stage gravity drop hammer discharger bottom is stretched into the secondary discharge port in the discharger and is had the one-level gravity drop hammer that the activity closure plate is sealed secondary discharge port, the lower end of two twin-stage gravity drop hammer dischargers connects and stretches in the discharger, and its lower end outlet is all stretched in the discharger.

3, etching waste liquor roasting drying oven according to claim 1 and 2, it is characterized in that: described pressure-air spray gun on the roasting tower side wall be arranged as with roasting tower axis angle be 45-60 °, be preferably 50 °, described aerial cooler has at least three group air heat exchangers and the blower fan of air is provided.

4, etching waste liquor roasting drying oven according to claim 1 and 2, it is characterized in that: the water-bath cooler that connects with aerial cooler comprises a water-bath Venturi tube and the wet dust collector that connects with it, water-bath Venturi tube top has at least two water pistols, and wet dust collector connects with aforesaid steam-water separator by the Fang Jing pipe.

5, etching waste liquor roasting drying oven according to claim 4, it is characterized in that: the lower sidewalls at wet dust collector and steam-water separator is provided with level detector, is provided with to repair in the lower sidewalls of top, wet dust collector and the steam-water separator of drying tower and imports and exports.