CN2142536Y

CN2142536Y - Dust-removing, desulfation and energy-saving device for boiler

Info

Publication number: CN2142536Y
Application number: CN 91202974
Authority: CN
Inventors: 王之顺
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-03-02
Filing date: 1991-03-02
Publication date: 1993-09-22
Anticipated expiration: 2001-03-02
Also published as: CN2121619U; CN2136394Y

Abstract

The utility model relates to a dust remover for the boiler, comprising a smoke box, an aeration tank and an aerator pipe. The smoke box is arranged on the top of the aeration tank and is connected with the smoke guide pipeline of the draft fan. After the smoke gas carries out the dry process and the dust removal, the smoke gas is led out by the draft fan, and enters aeration tank with the fixed alkaline water through the aerator pipe when the smoke gas is carried with the speed reduction and the pressure increase through the smoke box. The smoke gas carries out the wet dust removal and the chemical desulphurization in the aeration tank. The vaporized water vapor is exhausted into the air in low altitude through the exhaust opening and the discharging devices. Small quantity of water vapor is used as the primary air and the secondary air of the boiler. According to the actual measurement, after the smoke gas is purified by a plurality of times, the purification efficiency of the powder dust reaches to 97%, the discharge concentration is 31 mg/Nm<3>, the desulfurization efficiency reaches to 93%, and the discharge concentration of the SO2 is 5 mg/Nm<3>, and the thermal efficiency of the boiler improves about 8% to 10%.

Description

Dust-removing, desulfation and energy-saving device for boiler

The utility model belongs to dust-removing device for boiler.

The flue gas of present most of boiler enters atmosphere by chimney after dedusting, though big grain dust is removed, a large amount of micronic dusts and pernicious gas have still entered atmosphere, thoroughly do not solve atmosphere polluting problem.

The purpose of this utility model is passing through wet dedusting and chemical desulfurization again through the flue gas behind the dry method dust (as cyclone dust collector or heat exchange deduster), low latitude discharge water steam then, can solve the pollution of micronic dust and pernicious gas like this to atmosphere, utilize the temperature and the temperature of wind of raising and secondary wind to improve boiler thermal output simultaneously, realize energy-conservation.

The utility model is achieved in that

Boiler smoke is at first removed big grain dust by cyclone dust collectors or heat exchange deduster; draw by air-introduced machine then; send into a device that fills a certain amount of alkaline aqueous solution; utilize pressure and heat aeration in device of flue gas; pernicious gas and alkaline aqueous solution in the flue gas are fully reacted; neutralization; realize chemical desulfurization; micronic dust in the flue gas is also thoroughly cleaned; the steam major part of evaporation enters atmosphere by the exhaust apparatus low latitude; a small amount of water vapor is as wind of boiler and secondary wind, so both solved that micronic dust and pernicious gas can improve boiler thermal output again to the pollution of atmosphere in the flue gas.

Describe in detail below in conjunction with accompanying drawing:

Structure of the present utility model as shown in drawings, it is by aeration tank 15, aeration tube 28 and smoke box 14 are formed, aeration tank be with sheet metal be welded into cylindrical, the bottom is the jug of taper, in adorn a certain amount of alkaline aqueous solution, the inner tank wall anticorrosion lining of diabase flour sticking brick, tank wall is equipped with water level meter 30 and overflow mechanism 29, a spherical blowdown water valve 31 is adorned at the jar end, the tank body upside has a water vapour exhaust outlet 32, it is connected with vapor emission device, aeration tube is many earthenwares that are contained in the tank body top, the quantity of pipe, cross-sectional area and underwater penetration are decided on the boiler tonnage, and underwater penetration 70～230mm is for well.The aeration tank volume, the volume of the aqueous solution and the volume in waterborne space are all decided on the boiler tonnage in jar, also can calculate according to exhaust gas volumn and Coal-fired capacity, to guarantee that the flue gas and the aqueous solution have the time of enough reaction time and water circulation is principle, smoke box is the one section very short diffusion cross section flue that is contained in above the aeration tank, it with air inducing power traction smoke pipe road and expose to the sun the institute jar between be connected with the enamel dish, the smoke box inwall is pasted the diabase flour anticorrosive coat, flue gas is in this section deceleration supercharging, for next step aeration is prepared, the annular porous spray filling pipe 27 of one stainless steel is installed in the smoke box, enter the aeration tank aeration by aeration tube after the flue gas process smoke box deceleration supercharging, the water vapour of evaporation enters atmosphere by exhaust outlet through the steam discharging device low latitude, a small amount of water vapor from tapping equipment introduce boiler once with the secondary air channel road, sewage enters cesspool from spherical blowoff valve, purify the water source of back as moisturizing, when water is higher than the requirement water level in the aeration tank, automatically flow into cesspool from overflow mechanism, can be manual for the miniature boiler plumbing, can send water high-pressure pump and spherical blowoff valve with single board computer control for large-sized boiler, realize the plumbing automatic control.Can utilize boiler blowdown water and plant area's waste water as the water source.

The utility model is by the means of wet dedusting and chemical desulfurization flue gas to be done purified treatment, obtained good result, measured result after SHL10-13 and the enforcement of KZL4-13 boiler is shown, aeration tank to the arresting efficiency of flue dust about 95%, adsorption rate to pernicious gas can reach about 90～93%, after the process steam discharging device purified again, dust purification efficient reached 97%, and concentration of emission has only 31mg/Nm ³, desulfuration efficiency reaches 93%, SO ₂Concentration of emission have only 5mg/Nm ³Illustrated that the gas to airborne release purifies substantially, can utilize the water level of aeration tank to adjust burner hearth blast and flue gas flow rate in addition, the temperature and humidity of wind of boiler and secondary has also improved, these measures have all improved the thermal efficiency of boiler, by the actual measurement to above two kinds of model boilers, boiler thermal output improves about 8～10%, has reached energy-conservation purpose.

Description of drawings:

Figure is a structure chart of the present utility model.

14 is smoke boxes among the figure, the 15th, and aeration tank, the 27th, annular porous spray filling pipe, the 28th, aeration tube, the 29th, overflow mechanism, the 30th, water level meter, the 31st, spherical blowdown water valve, the 32nd, water vapour exhaust outlet.

Embodiment:

The apparatus structure size of implementing on KZL4-13 type boiler: the high 2500mm of aeration tank, diameter are 2000mm, 110 of aeration tubes, long 850mm, external diameter 80mm, wall thickness 10mm.

Claims

1, a kind of boiler dusting desulphurization energy-saving device is made up of smoke box, aeration tank and aeration tube, it is characterized in that:

A, described smoke box are the one section very short diffusion cross section flues that is contained in above the aeration tank, it with air inducing power traction smoke pipe road and aeration tank between be connected with the enamel dish, the smoke box inwall is pasted the diabase flour anticorrosive coat, adorns the annular porous filling pipe of a stainless steel in the case;

B, described aeration tank are to hold the jug of taper with cylindrical, bottom that sheet metal is welded into, the inwall anticorrosion lining of diabase flour sticking brick, an exhaust outlet that connects vapor emission device is arranged on the upper portion side wall, sidewall is equipped with water level meter and sewage overflow device, and a spherical sewer valve is adorned at a jar end;

C, described aeration tube are the earthenwares that is contained in the aeration tank top, the quantity of pipe, cross-sectional area and go deep into the degree of depth 70～230mm (deciding on the boiler tonnage) of alkaline aqueous solution in the aeration tank.

2, the described dust-removing device for boiler of claim 1 is characterized in that the volume of described aeration tank is decided on the boiler tonnage.