CN2261876Y

CN2261876Y - Venturi water film dust remover

Info

Publication number: CN2261876Y
Application number: CN 95224127
Authority: CN
Inventors: 高元松
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-11-09
Filing date: 1995-11-09
Publication date: 1997-09-10
Anticipated expiration: 2005-11-09

Abstract

The utility model relates to a venturi water film dust remover, which is a wet dust removal apparatus used for matching with an industrial boiler or a kiln. The utility model is composed of an inverted cone-shaped cylindrical body, a venturi, a jet tube apparatus having a reflecting screen, an annular water gathering system and an ash discharge drain system. The ash discharge drain system is provided with an ash punching pipe. Compared with the existing venturi water film dust remover, the utility model has the advantages of high efficiency of dust removal, easy ash discharge, convenient processing and maintenance, etc.

Description

Venturi water film deduster

The utility model belongs to the boiler exhaust gas treatment technology, is the wet dust removal device that is used for Industrial Boiler or kiln.

The venturi wet type water film dust removal device of present domestic use as shown in Figure 1, it mainly is made up of gas approach (1), exhanst gas outlet (2), cylindrical shell (3), overflow launder (4), Venturi tube (5), jet pipe (6), peep hole (7), ash overflow port (8).The circular staving that cylindrical shell (3) is made for granite, Venturi tube (5) is made of reducing pipe, trunnion and increaser, at the convergent pipeline section stent-type jet pipe (6) being housed sprays water to the trunnion position, this dust arrester adopts the overflow-type collecting system, promptly have overflow launder (4) on the top of cylindrical shell (3), form top-down moisture film by overflow launder trickle in cylindrical shell, this structure processing difficulties, cost height.The operation principle of venturi water film dust arrester is: boiler is discharged when containing flue gas and entering the throat of Venturi tube by import (1), with the grit that the pressure water smoke by jet pipe (6) ejection contacts, coalescence becomes band water, enter in the cylindrical shell with the lower tangential of flue gas then by cylindrical shell (3), and rotation is risen under action of centrifugal force, water droplet in the flue gas gets rid of to cylinder inboard wall with grit and separates with flue gas, flow to the bottom ash bucket together in company with the moisture film that flows downward, flue gas after being purified is discharged from cylindrical shell (3) top exhanst gas outlet (2).This deduster has following shortcoming: 1. because Venturi tube throat water spray adopts the stent-type jet pipe, and not only atomizing effect is bad, influences efficiency of dust collection, and resistance is big, maintenance is also inconvenient.2. cylindrical shell is a vertical garden tube, and the easy drift of top-down moisture film on the barrel causes moisture film and gets rid of that grit to barrel contacts, the chance of coalescence is few, thereby influences efficiency of dust collection.3. collecting system adopts overflow-type, processing difficulties, cost height.4. ash dropping hopper and ash discharging hole are easily stopped up by grit, and influence is operation normally.

The purpose of this utility model provide a kind of efficiency of dust collection height, ash discharge unobstructed, be easy to the venturi water film deduster processing and keep in repair, thereby overcome the deficiency of existing venturi water film dust arrester.

The structure of venturi water film deduster as shown in Figure 3.It mainly is made up of the Effuser device (6,13,14,15,16,17) of gas approach (1), exhanst gas outlet (2), cylindrical shell (3), Venturi tube (5), band radiation shield, upright core pipe (9), annular collecting system (10,11,12), ash discharge drainage system (8,18,19).Cylindrical shell (3) is made by granite, barrel is a back taper, because cylindrical shell has this tapering, make that the moisture film of spray is difficult for leaving barrel and drift from top to bottom, promoted fully to contact cohesion from top to bottom along between the spiralling ash-laden gas of barrel and the moisture film, thereby increased efficiency of dust collection, the diameter of cylindrical shell (3) and height can be decided according to the exhaust gas volumn size that boiler is handled.Venturi tube (5) is located in the bottom of cylindrical shell (3), be the snail formula with cylindrical shell and be connected (as shown in Figure 4), Venturi tube is made by granite, it is by reducing pipe, trunnion and increaser are formed, gas approach (1) is arranged on the end face of reducing pipe, also be provided with Effuser device in convergent pipeline section both sides, this device as shown in Figure 7, ring flange (13) is used for jet pipe (6) is fixed on the Venturi tube, nozzle (15) is connected with jet pipe (6), nozzle inlet (14) is a disc-shape, the center has bolt (16) to be used for fixing radiation shield (17), several holes is arranged by press water on the dish, its pore size and number are decided according to the size of deduster, radiation shield (17) is arranged on outside nozzle, water with certain pressure is by the aperture of jet pipe (6) by nozzle inlet (14), during again through nozzle outlet ejection, be subjected to the reflection of radiation shield (17), make water smoke big and even at throat's spray area of Venturi tube, impel water smoke fully to mix like this with the ash-laden gas that enters Venturi tube, enter cylindrical shell (3) after the cohesion, grit flows into water shutoff groove (19) with moisture film, increased efficiency of dust collection, jet pipe and nozzle are all made of stainless steel, and it is little that this Effuser device has a resistance, advantage easy to maintenance.Peep hole (7) is arranged on the converging transition of Venturi tube, in order to observe the injection situation of jet pipe.Upright core pipe (9) is installed in the centre of cylindrical shell (3), its lower end is that 90 ° of bend pipes stretch out outside the cylindrical shell, this pipe is made by granite, have some apertures in the top 100～300mm of pipe, the aperture is 5～15mm, be used for spray water mist, make ash-laden gas in the cylindrical shell (3) have that more opportunity is mixed with water smoke, coalescence, thus the increase efficiency of dust collection.The structure of annular collecting system as shown in Figure 5, it is used to replace the overflow launder (4) on the existing venturi water film deduster, annular collector pipe (10) is positioned at cylindrical shell (3) periphery, top, the inwall of pipe has some apertures, the aperture is greatly in 10～50mm scope, use same quantity, the short tube (12) of same diameter is connected on the cylindrical shell (3), on each short tube, all be provided with the nozzle (11) that stainless steel is made, the arrangement of short tube can be perpendicular to cylindrical shell (3), also can be along arranging (showing) as Fig. 6 with cylindrical shell (3) tangential direction, can make of the inwall rotation decline of the water smoke of ejection thus like this along cylindrical shell (3), reach with cylindrical shell in the well-mixed purpose of ash-laden gas that rises of rotation, that section short tube near cylindrical shell (3) is made of stainless steel, and another section is made of common steel tube, connects with loose joint between two sections.Ash discharge drainage system such as Figure 10, the hawk (8) that overflows among the figure is positioned at bottom one side of cylindrical shell (3), apart from about the about 50mm of cylindrical shell, its height is decided according to the size of deduster, but need be higher than about the 30mm of cylindrical shell bottom, thickness is about 100mm, material is a granite, water shutoff groove (19) is positioned at the bottom of cylindrical shell (3), and tube for removing ash (18) is installed on the position of the about 150mm in cylindrical shell bottom, generally establishes 2, diameter is 25～30mm, made by stainless steel, this deduster makes dust be difficult for accumulating in the water shutoff groove and stops up owing to set up tube for removing ash.

This device operation principle is: the ash-laden gas of being discharged by boiler enters Venturi tube (5) with certain speed by gas approach (1), mix with the water smoke of jet pipe (6) ejection in its throat, snail is to entering cylindrical shell (3) then, under centrifugal action, ash-laden gas rises in the shape of a spiral, and with spray the even moisture film that gets off by collector pipe (10) with upright core pipe (9) top and contact, grit is condensed once more, capture, the press water that contains grey moisture film and tube for removing ash (18) that flows downward meets, make grit be difficult for deposition in water shutoff groove (19), successfully discharge through the hawk (8) that overflows, flue gas after being purified enters chimney by spiral case outlet (2).

Description of drawings:

Fig. 1 is existing venturi water film deduster structure chart;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is a venturi water film deduster structure chart described in the utility model;

Fig. 4 is the A-A cutaway view of Fig. 3;

Fig. 5 is annular captation schematic diagram;

Fig. 6 is the C-C cutaway view of Fig. 5;

Fig. 7 is the Effuser device schematic diagram of band radiation shield;

Fig. 8 is the schematic diagram of ring flange among Fig. 7;

Fig. 9 is the schematic diagram of radiation shield among Fig. 7;

Figure 10 is an ash discharge water discharging part schematic diagram;

Figure 11 is the D-D cutaway view of Figure 10.

Embodiment.The granite venturi water film deduster of joining the 10T/H hot-water boiler.The total height of cylindrical shell (3) is 9490mm, internal diameter is 1700mm, wall thickness is 200mm, inner tube wall is a back taper, Venturi tube (5) is connected with cylindrical shell (3) at 1660mm place, distance cylindrical shell bottom, internal diameter at this position upper shell (3) is 1400mm, both connected modes are snail formula (as shown in Figure 4), Venturi tube length overall 4000mm, wall thickness is 220mm, throat diameter is 480mm, smoke inlet (1) is the end face of Venturi tube converging transition, is of a size of 1200mm, is provided with 6 Effuser devices (showing as Fig. 7) that have radiation shield (17) in the converging transition both sides at distance gas approach (1) 90mm place, annular collector pipe (10) is positioned at the periphery of cylindrical shell (3), near cylindrical shell top, caliber is 50mm, and 12 holes are arranged on the inwall of pipe, and the aperture is 15mm, and be connected to there being 12 short tubes (12) to be tangentially with cylindrical shell (3), on the every short tube nozzle (11) that stainless steel is made is housed.Upright core pipe (9) is positioned at the center of cylindrical shell (3), diameter is 30mm, wall thickness is 40mm, have 10 apertures in the top 150mm of pipe, the aperture is 10mm, and the lower end of pipe is that 90 ° of bend pipes stretch out outside the cylindrical shell, behind this pipe charged pressure water, can make the interior flue dust of water smoke and cylindrical shell fully mix, condense from aperture spray water mist in cylindrical shell.Tube for removing ash (18) is positioned at the bottom of cylindrical shell (3), apart from bottom 150mm place, establishes 2 altogether, and caliber is 20mm, adopts stainless steel, and the height of the hawk (8) that overflows is 450mm, and thickness is 100mm.This deduster after tested, efficiency of dust collection is 96%.

The HCWS type venturi water film deduster efficiency of dust collection that the utility model provides can reach 95%～97.5%, and original venturi water film deduster efficient is below 95%, and visible efficiency of dust collection is greatly improved.In addition, adopt annular collecting system to replace the spilling water groove, avoided processing difficulties, also reduced cost; Adopt the jet pipe dress of band radiation shield

Claims

1. venturi water film deduster, comprise gas approach (1), exhanst gas outlet (2), cylindrical shell (3), overflow launder (4), Venturi tube (5), jet pipe (6), peep hole (7), hawk (8) overflows, it is characterized in that cylindrical shell (3) is a back taper, the structure of overflow launder (4) is annular collecting system (10,11,12), annular collector pipe (10) is arranged on the top of cylindrical shell (3), be looped around the cylindrical shell periphery, the inwall of pipe has several holes, the aperture is in 10～50mm scope, and the short tube (12) of being furnished with same quantity and diameter is connected on the cylindrical shell (3), and stainless steel nozzle (11) is housed on each short tube.

2. according to the described venturi water film deduster of claim 1, it is characterized in that jet pipe (6) adopts the Effuser device of band radiation shield (17), this device is arranged on the converging transition of Venturi tube (5), ring flange (13) is in order to be fixed on venturi tube wall both sides with jet pipe (6), nozzle inlet (14) is on the end face of jet pipe (6), be a disc-shape, the center has bolt (16) that radiation shield (17) is fixed on the exit of nozzle (15), and several holes is arranged on the disk.

3. according to the described venturi water film deduster of claim 1, it is characterized in that having set up upright core pipe (9) in the centre of cylindrical shell (3), this pipe is made by granite, and the lower end of pipe is that 90 ° of bend pipes stretch out outside the cylindrical shell, have some apertures in the top 100～300mm of pipe, the aperture is 5～15mm.

4. according to the described venturi water film deduster of claim 1, it is characterized in that in distance cylindrical shell (3) bottom be in 100～300mm scope, two tube for removing ash (8) are installed on barrel, this tube for removing ash adopts stainless steel, and caliber is in 10～50mm scope.