High-efficiency desulfurization waste liquid is carried salt retracting device
The present invention relates to a kind of waste liquid purification retracting device, especially relates to high-efficiency desulfurization waste liquid and carries salt retracting device.
In coke-oven plant taking ammonia as alkali source, adopt in the desulfurization of binuclear cobalt phthalocyanine ammonium sulfonate (PDS) catalyst, in its doctor solution, salt content can progressively increase, when salt content reaches 250g/L when above, desulfuration efficiency can reduce. Therefore in sweetening process, must outwards discharge part doctor solution (desulfurization waste liquor), supplement again in addition the new ammoniacal liquor of part, salt content in doctor solution is controlled in regulation requirement, thereby guarantee desulfurized effect. And contain ammonium thiocyanate, ATS (Ammonium thiosulphate), ammonium sulfate etc. in the desulfurization waste liquor of discharge, and if material had both been wasted in the not treated directly externally discharge of desulfurization waste liquor, again can serious environment pollution. Therefore in prior art, all can process desulfurization waste liquor, the one, can from desulfurization waste liquor, reclaim the important industrial chemicals such as ammoniacal liquor, ammonium hydrogen sulfate, ammonium thiocyanate, can eliminate again the pollution of desulfurization waste liquor to environment. Also can make the salt content in desulfurization waste liquor reduce simultaneously, make desulfurization waste liquor become new ammoniacal liquor doctor solution and reenter in desulphurization system and utilize, reduce new ammoniacal liquor and supplement, reduce processing cost, turn waste into wealth, both can improve Business Economic Benefit, can reduce again environmental pollution.
At present, the method and system of desulfurization waste liquor processing is also more, as vacuum evaporating crystalization is put forward salt system, burned acid making system, preparing sulfuric acid by oxidizing ammonium system etc. In the above system, desulfurization waste liquor generally will pass through all multiple operation such as double-stage filtering, activated carbon decolorizing, vacuum evaporation, and its double-stage filtering is an important operating procedure, and what the quality of filter effect directly affected desulfurization waste liquor puies forward salt and ammoniacal liquor organic efficiency. And the filtration of existing desulfurization waste liquor is mainly with coke and micropore ceramic tube double-stage filtering, the subject matter that this two-stage filtering device exists is: one-level coke filtering device was processed after a period of time, after the indissoluble degradation product of coke in adsorption desulfurize waste liquid, easily be deposited on coke surface and inner formation passivation, block filtering micropore, thereby reduce suction-operated and filter effect, coke filtering device cannot carry out backwash regeneration, must regularly carry out coke replacing, increase processing cost; Because of coke filtration exist equipment huge, take up an area that space is large, maintenance difficulty, thereby can not backwash and make the usefulness performance of short, shortcoming seriously the restricted whole desalination system such as treatment effect is not good enough of the cycle of operation. Secondary micropore ceramic tube filter is a kind of Novel high-efficiency filtering technique, at present also many for the micropore ceramic tube filter of industrial wastes, but existing micropore ceramic tube filter is mostly waste liquid to be introduced in earthenware, in managing, to pipe, ooze out again, the disadvantage of this mode is that a large amount of difficult degradation things is gathered in pipe, easily results in blockage, and pipe inside and outside differential pressure is large, the filtration that causes screen pipe explosion to have a strong impact on separation of flow waste liquid is oozed out, and reduces filter effect. Next is that existing micropore pottery filter is mostly upper and lower two-way fixing, complicated structure, and processing, installation and maintenance inconvenience, cost is higher.
Summary of the invention
For existing problem in above-mentioned prior art, the invention provides one simple structure compactness is housed, to manufacture convenient for installation and maintenancely, the desulfurization waste liquor of the better micropore ceramic filtering apparatus of filter effect is carried salt retracting device.
The technical scheme that the technical problem to be solved in the present invention is taked is, described high-efficiency desulfurization waste liquid is carried salt retracting device and is comprised two-stage filtering device, described two-stage filtering device is interconnected and is formed by two micropore ceramic filtering apparatus, described micropore ceramic filtering apparatus comprises tank body and end socket, tank body lower part is provided with inlet and sewage draining exit, tank body top is provided with liquid outlet and exhaust outlet, tank body top is provided with the backwash mouth being communicated with liquid outlet, in tank body, be provided with supporting disk, on supporting disk, be arranged at intervals with fluid hole, the supporting disk bottom surface interval relative at fluid hole is fixedly installed stop collar, stop collar and micropore ceramic tube upper end external diameter are closely matchedly connected, micropore ceramic tube lower end is connected with sealing gasket by convex-concave structure, sealing gasket is arranged on pressing plate, micropore ceramic tube upper end communicates with tank inner chamber by fluid hole, on supporting disk corresponding to micropore ceramic tube upper end, be provided with the fixed mount of riding, described ride to be provided with between frame and pressing plate micropore ceramic tube can be to hanging like interval and be fixed on the pull bar on supporting disk.
Innovation one of the present invention is existing desulfurization waste liquor to be carried to the two-stage filtering device being made up of coke and earthenware in salt retracting device be designed to the two-stage filtering device being mutually in series by two cover micropore ceramics block filtering devices, both can reduce and take up room, simplify filter plant, extend the cycle of operation, save construction cost, can improve again desulfurization waste liquor filter effect; The 2nd, further microporous ceramic filter is carried out to significant improvement, fixedly changing former micropore ceramic tube two ends into upper end supporting disk by gripper shoe fixes, makes micropore ceramic tube lower end to be hanging like with the frame of riding, both can prevent that indissoluble degradation product was gathered in pipe, and be conducive to the filtration of doctor solution and be convenient to backwash.
The present invention compared with prior art has the following advantages:
1, specific filtration resistance surface area increases, and separate unit filtration treatment amount improves, and has reduced processing cost,
2, desulfurization waste liquor goes out in entering outward, and pipe inside and outside differential pressure is little, and screen pipe bears pressure and increases, applied widely,
3, pollution discharge capability is strong, and backwashing time is short and the backwash water yield is few,
4, compact conformation, take up room littlely, processing, installation and maintenance are convenient,
5, durability is strong, long service life.
Brief description of the drawings
Fig. 1 is the sectional structure schematic diagram of the first ceramic filtering device of the present invention,
Fig. 2 is the sectional structure schematic diagram of the second ceramic filtering device of the present invention,
Fig. 3 is the A-A sectional structure schematic diagram of Fig. 2,
Fig. 4 be the B of Fig. 3 to structural representation,
Fig. 5 is the C-C sectional structure schematic diagram of Fig. 2.
End socket 2, supporting disk 3, support ring 4, micropore ceramic tube 5, tank body 6, inlet 7, sewage draining exit 8, liquid outlet 9, backwash mouth 10, exhaust outlet 11, stop collar 12, supporting plate 13, pressing plate 14, sealing gasket 15, pull bar 16, diagonal brace 17, pressure pad 18, the fixed mount 19 of riding, fluid hole 20, cover plate 21, fluid-through tube 22, dirty discharge orifice 23, blow-off pipe 24, separating plate 25, fluid-through port 26, substrate 27, filter chamber in the drawings, 1.
Detailed description of the invention
Embodiment 1, described high-efficiency desulfurization waste liquid is carried salt retracting device by extracting, evaporation, insulation, cooling, the treating apparatus such as crystallization and filtration combines by certain technological process, comprising two-stage filtering device (thick level is filtered and essence level is filtered), described two-stage filtering device is interconnected and is formed by two micropore ceramic filtering apparatus, as Fig. 1, the micro-also ceramic filtering device of the first shown in Fig. 3 and Fig. 4, described micropore ceramic filtering apparatus comprises tank body 5 and the end socket 1 made with stainless steel, tank body lower part is provided with inlet 6 and the sewage draining exit 7 of desulfurization waste liquor, tank body top is provided with liquid outlet 8, on cover, be provided with backwash mouth 9 and exhaust outlet 10, backwash mouth communicates with liquid outlet, in support ring 3 in tank body, be fixedly installed the supporting disk 2 of stainless steel, on supporting disk, be arranged at intervals with fluid hole 19, on the relative supporting disk bottom surface of fluid hole, interval is fixed (welding or alternate manner) and is provided with stop collar 11, stop collar and micropore ceramic tube 4 upper end external diameters are closely matchedly connected, micropore ceramic tube is circular and is crisscross arranged, fluid hole size is identical with micropore ceramics pipe orifice, micropore ceramic tube lower end is connected with sealing gasket 14 by convex-concave structure (ladder disk), sealing gasket is arranged on pressing plate 13, micropore ceramic tube upper end is connected with tank inner chamber by fluid hole, on supporting disk corresponding to micropore ceramic tube upper end, be fixedly installed the fixed mount 18 of riding, micropore size is 5～80 μ m, ride fixed mount across on micropore ceramic tube, neither affect the overflowing of doctor solution after earthenware filters in tank, can be used for again the fixed platform of micropore ceramic tube upper end, described ride to be provided with between fixed mount and pressing plate micropore ceramic tube can be to hanging like interval and be fixed on the pull bar 15 in gripper shoe, between pressing plate and pull bar, be preferably provided with supporting plate 12, pull bar lower end is fixedly linked by supporting plate and nut and pressing plate, pull bar upper end is through micropore ceramic tube, supporting disk and the fixed mount of riding, be fixed on and ride on fixed mount with nut and pressure pad 17, ride in fixed mount and be symmetrically arranged with diagonal brace 16, to improve intensity and the rigidity of the fixed mount of riding. desulfurization waste liquor enters in tank body from inlet, enters inside pipe wall simultaneously, then oozes out and enter in pipe from inwall, then enter in tank body and discharge from liquid outlet from fluid hole under action of hydraulic force from micropore ceramics outer surface. this filtration can form the inside and outside large pressure reduction of micropore earthen-ware pipe.
Embodiment 2, micropore ceramic filtering apparatus is except the micropore ceramic filtering apparatus of structure as shown in Figure 2 and Figure 5 and the first structure is different described in embodiment 2, and other structure is identical with embodiment 1. remove totallyer for making to enter particulate foreign material in the desulfurization waste liquor in microporous filter, guarantee that micropore ceramic tube is difficult for stopping up, improve the filter effect of micropore ceramic tube, extend the filter cycle of micropore ceramic tube, improve filter efficiency, carrying out first carrying out pre-filtering processing before micropore ceramic filter processing, be provided with the substrate 26 of making by stainless steel in micropore ceramic tube bottom, cover plate 20, fluid-through tube 21, the filter chamber 27 with fluid-through port 25 that blow-off pipe 23 and separating plate 24 form, substrate is fixed on bottom in tank body, substrate pars intermedia is connected with separating plate sealing, substrate periphery portion is grid hole (not marking in figure), be that substrate is except filter chamber part, other part can make tank body communicate up and down, desulfurization waste liquor is introduced into filter chamber and carries out pre-filtering, after pre-filtering, enter again in micropore ceramics device and filter. described filter chamber is involute shape, described separating plate lower end is connected with substrate, separating plate upper end is connected with cover plate, fluid-through tube one end by the pump housing be connected with desulfurization waste liquor, the other end extend into filter chamber center through separating plate bottom, the left side, separating plate top is provided with dirty discharge orifice 22 on the right, dirty discharge orifice is connected with blow-off pipe 23, the desulfurization waste liquor filtering through filter chamber flows out and enters in tank body from fluid-through port 25, then flows into liquid outlet and discharge the ammonia circulation system that enters through fluid hole after micropore ceramics device filters. described desulfurization waste liquor is introduced into filter chamber center after pump housing pressurization, desulfurization waste liquor forms eddy current in rapid flow in the filter chamber of involute shape, due to the effect of vortex centrifugal power, particulate foreign material in desulfurization waste liquor in filter chamber by separating floating progressively at desulfurization waste liquor upper surface, and floating thing is by discharging in dirty discharge orifice and blow-off pipe.