CN103406011B - A kind of equipment of pesticides packaging castoff burning vent gas treatment - Google Patents

Abstract

The invention discloses the equipment of a kind of pesticides packaging castoff burning vent gas treatment, it includes atomizer, Venturi tube mixer, cylinder and vertebral body, described Venturi tube mixer is vertically arranged, the upper inlet port end of Venturi tube mixer is connected with flue gas pipeline, flue gas pipeline center before the described atomizer of fogged lye is installed on Venturi tube mixer upper inlet port, the bottom of described Venturi tube mixer is arranged in described cylinder and is positioned at the center of cylinder, described cylinder upper end closed, the top of cylinder is provided with gas outlet, the lower end of cylinder is connected with described vertebral body.

Description

A kind of equipment of pesticides packaging castoff burning vent gas treatment

Technical field

The invention belongs to fume treatment field of environment protection equipment, be specifically related to fume treatment after a kind of pesticides packaging castoff burning Equipment, is mainly used in the removal of the flue gas containing sour gas that pesticides packaging castoff burning processing procedure produces, can be used for Existing burning facility transformation and the fume treatment of newly-built burning facility.

Background technology

A large amount of pesticides packaging garbages in current domestic generation need to carry out harmless treatment, and wherein burning disposal is more to have The processing method of effect, for burning HCl, SO in the flue gas produced₂、NO_X、P₂O₅Need effectively to go Deng pollutant Remove, it is to avoid the secondary pollution that tail gas causes, after current domestic existing technology is not specifically designed for pesticides packaging castoff burning The purification equipment of flue gas.In the deacidification of flue gas and mainly there are wet method and semidry method two ways, wherein wet method deacidification technique technology Exploitation early, is widely used, and technology is the most ripe, main by alkali liquor spray washing flue gas, but wet method deacidification existence generates Sewage after spray needs the secondary pollution problems such as process again, unsatisfactory in the minimizing of pollutant.The most half-dried Method deacidification technique gradually rises, i.e. by by after alkali liquor atomization, spraying in high-temperature flue gas, the sour gas in neutralizing flue gas While, the moisture in alkali liquor is evaporated by flue gas, produces inorganic salt crystallization, then separate removal after reaction, the party Method solves wet method deacidification can produce the problem that sewage needs after-treatment.But, current domestic semidry method extracting tower is mostly adopted By the mode of Direct spraying in tower, alkali liquor is little with the contact area of flue gas, and mixed effect is poor, and deacidifying flue gas is inefficient, and Packing bag for agricultural chemical burns containing substantial amounts of sour gas, complicated component in the flue gas produced, and hazardness is big, needs a kind of special Gas cleaning deacidification equipment targetedly.

Summary of the invention

The purpose of the present invention is to propose to a kind of semidry method neutralizing tower, develop cigarette that is a kind of efficient and don't that produce secondary pollution Gas deacidification equipment, the special purified treatment problem solving pesticides packaging waste incineration flue gas.

The purpose of the present invention can be reached by following measures:

The equipment of a kind of pesticides packaging castoff burning vent gas treatment, it includes atomizer, Venturi tube mixer, cylinder And vertebral body, described Venturi tube mixer is vertically arranged, and the upper inlet port end of Venturi tube mixer is connected with flue gas pipeline, Flue gas pipeline center before the described atomizer of fogged lye is installed on Venturi tube mixer upper inlet port, The bottom of described Venturi tube mixer is arranged in described cylinder and is positioned at the center of cylinder, end seal on described cylinder Closing, the top of cylinder is provided with gas outlet, and the lower end of cylinder is connected with described vertebral body.

This equipment can be divided into air inlet mixing section and cyclonic separation section, and wherein atomizer and Venturi tube mixer belong to air inlet and mix Closing section, cylinder and vertebral body belong to cyclonic separation section.Between air inlet mixing section and cyclonic separation section use flange, welding or other Mode connects.

The atomizer of air inlet mixing section can be connected by flange is fixing with flue gas pipeline or Venturi tube mixer.Atomizer For dual-medium nozzle, its entrance carries pipe with atomizing medium pipe and alkali liquor respectively and is connected.Atomizer is with compressed air or high pressure Steam is atomizing medium, (by flow of flue gas direction) before alkali liquor nozzle is arranged on Venturi tube by Flange joint, through spray The alkali liquor of mouth atomization sprays into Venturi tube at a high speed, provides partial power for the gas-liquid mixed in Venturi tube, greatly reduces flue gas The pressure loss, alkali liquor nozzle material can use 316L rustless steel.

The blast tube diameter D of atomizer (1)_y(mm) it is calculated as follows:

$D_z=18.8\×\sqrt{\frac{Q_z}{{\mathrm{\ρ}}_z{v}_z}}---\left(\mathrm{III}\right)$

Q_z-flux of alkaline liquor, kg/h,

Ρ_zThe density of-alkali liquor；

v_z-alkali liquor flow velocity；

The atomization radius r(mm that atomizer (1) sprays) it is calculated as follows:

$r=\frac{0.209}{\mathrm{\ρ\Δi}}\×{10}^6---\left(\mathrm{IV}\right)$

Propellant density when ρ-expansion ends, m³/kg；

Before and after Δ i-expands eventually, propellant ratio can land, Δ i=i₁-i₂, KJ/kg.

Venturi tube mixer is placed in above cylinder, and flue gas is vigorously mixed in Venturi tube mixer with fogged lye, flue gas In sour gas and alkali liquor occur to neutralize reaction and generate inorganic salt, the moisture in alkali liquor is gasified totally by high-temperature flue gas heating, Inorganic salt crystallization forms salt fines and jointly flows with air-flow, and Venturi tube mixer material is 316 rustless steels.

The caliber Dy(mm of Venturi tube mixer (2)) it is calculated as follows:

$D_y=18.8\×\sqrt{\frac{Q_y}{v}}---\left(I\right)$

Qy-flue gas and the atomization gas actual flow by pipeline section, m³/ h,

V-flue gas and the atomization gas flow velocity by pipeline section, m/s；

The resistance Py(Pa of described Venturi tube mixer (2)) it is calculated as follows:

Py=0.6×10^-4v_r ²L (II)

v_r-flue gas and the atomization gas flow velocity by trunnion, m/s,

L-liquid air volume ratio, l/m³。

Cylinder is cylindrical structure, and its interior diameter is more than the diameter of described Venturi tube mixer lower surface.Vertebral body is upper end Face area is more than the hollow cone platform structure of lower surface area.It is provided with bracing frame in the outside of described cylinder and/or vertebral body.Rotation Wind segregation section uses 316 rustless steels to make, and is mainly made up of cylinder, vertebral body, gas outlet, bracing frame.Containing inorganic salt Air-flow enters cylinder from tangential inlet, and air-flow is rotated down along outer wall and moves, and rotates up after arriving bottom vertebral body, after warp Discharge pipe flows out, and after inorganic salt fines shifts to outer wall under the influence of centrifugal force, falls along wall, enters flue-dust retainer.

The flow velocity vi (m/s) of cylinder (4) import is calculated as follows:

$\mathrm{vi}=\sqrt{2\mathrm{\Δp}}/\sqrt{\mathrm{\ϵ\ρ}}---\left(V\right)$

Δ p-allowable pressure drop, Pa,

ρ-smoke density, kg/m^3,

ε-resistance coefficient,

Cylinder (4) import sectional area A (m²) it is calculated as follows:

A=Qy/3600vi (VI)

Barrel diameter D(m) it is calculated as follows:

$D=2.22\sqrt{A}---\left(\mathrm{VII}\right).$

The present invention merges high-efficient atomizing dual-medium nozzle, Venturi tube mixer, cyclone separator technology, develops half Dry method neutralizing tower.The operation principle of this equipment is: first, utilizes efficient atomizer, with compressed air or high steam For power, spray into Venturi tube mixer, flue gas and mist by nozzle by after fine droplet that alkali liquor atomization is 5～50 μm Alkali liquor after change is vigorously mixed in Venturi tube, and takes full advantage of the power of high velocity jet alkali liquor, the sour gas in flue gas Occurring to neutralize reaction with alkali liquor and generate inorganic salt, the moisture in alkali liquor is simultaneously by high-temperature flue gas heating evaporation, the nothing that reaction generates Machine salt-pepper noise is separated out and is separated with flue gas by cyclone separator, thus realizes not only removing acid gas in flue gas but also do not produce dirt The purpose of water.

Beneficial effects of the present invention: the present invention fully uses Venturi tube mixing wastewater with air principle, reaches the height mixing of air water, Utilizing again compressed air as the power of fogged lye, solve the shortcoming that venturi scrubber flue gas loss in head is big, ratio is often The Venturi tube loss in head of rule reduces more than 50%, greatly reduces the energy consumption of flue gas blower fan；On the other hand, alkali liquor warp The fine droplet formed after compressed air atomization is big with the contact area of flue gas, the alkaline matter in alkali liquor and the acidity in flue gas Gas is sufficiently reacted, and evaporates rapidly in alkali liquor after moisture heat absorption, prevents moisture from evaporating incompletely formed sewage, has concurrently The high advantage produced without sewage with dry method dust of wet dedusting efficiency, simultaneously as moisture evaporation can reduce flue-gas temperature, The temperature of fume emission can be controlled by controlling the concentration of alkali liquor and flux of alkaline liquor, be a kind of efficiently, energy-saving and environmental protection, The equipment that the incineration tail gas of automatization processes.

Accompanying drawing explanation

Fig. 1 is the structural representation of present device.

In figure, 1-atomizer；2-Venturi tube mixer；3-gas outlet；4-cylinder；5-vertebral body；6-supports Frame.

Detailed description of the invention

Below in conjunction with drawings and Examples, present disclosure is described further.

As it is shown in figure 1, the equipment of this pesticides packaging castoff burning vent gas treatment includes that atomizer 1, Venturi tube mix Device 2, cylinder 4, vertebral body 5 and bracing frame 6.Wherein atomizer 1 and Venturi tube mixer 2 are air inlet mixing section, Cylinder 4, gas outlet 3, vertebral body 5 and bracing frame 6 are cyclonic separation section.

Venturi tube mixer 2 is vertically arranged, and the upper inlet port end of Venturi tube mixer is connected with flue gas pipeline, is used for The atomizer 1 of fogged lye is installed on the flue gas pipeline center before Venturi tube mixer upper inlet port, and it passes through Flange joint is on flue gas pipeline, and atomizer 1 connects compressed air and alkali liquor, and nozzle is detachable, has regulation valve before nozzle, Adjustable nozzles flow.

In the bottom of Venturi tube mixer 2 is arranged at cylinder 4 and be positioned at the center of cylinder, end seal on described cylinder 4 Closing, the top of cylinder 4 is provided with gas outlet 3, and the lower end of cylinder is connected with described vertebral body 5.Cylinder 4 is cylindrical structure, Its interior diameter is more than the diameter of described Venturi tube mixer lower surface.Vertebral body 5 is more than lower surface area for upper surface area Hollow cone platform structure.It is provided with bracing frame 6 in the outside of described cylinder and/or vertebral body.

This equipment is mainly high temperature resistant and anticorrosion to material requirements；Alkali liquor nozzle is to machining accuracy and assembly precision requirement Also the highest.According to requirements above, in terms of selection: atomizer, Venturi tube mixer, cylinder, vertebral body etc. is adopted Use 316 rustless steels.In terms of machining, alkali liquor nozzle uses machining accuracy higher and reliable numerically controlled processing equipment enters Row processing；Remainder uses the assembling of common cold welding；In terms of equipment assembling, knack assembler is selected to assemble

The use process of this equipment is as follows: alkali liquor nozzle uses dual-medium nozzle, is situated between with compressed air or high steam for atomization Matter, at a high speed sprays into Venturi tube through the alkali liquor of nozzle atomization, provides partial power, flue gas for the gas-liquid mixed in Venturi tube Being vigorously mixed in Venturi tube mixer with fogged lye, the sour gas in flue gas and alkali liquor occur to neutralize reaction and generate nothing Machine salt, the moisture in alkali liquor is gasified totally by high-temperature flue gas heating, and inorganic salt crystallization forms salt fines and jointly flows with air-flow. Air-flow containing inorganic salt enters cylinder from tangential inlet, and air-flow is rotated down along outer wall and moves, and arrives on backward bottom vertebral body Rotate, after flow out through discharge pipe, after inorganic salt fines shifts to outer wall under the influence of centrifugal force, fall along wall, enter Flue-dust retainer under vertebral body.

Claims (7)

1. the equipment of a pesticides packaging castoff burning vent gas treatment, it is characterised in that it includes atomizer (1), literary composition Venturi blender (2), cylinder (4) and vertebral body (5), described Venturi tube mixer (2) is vertically arranged, venturi The upper inlet port end of pipe blender (2) is connected with flue gas pipeline, and the described atomizer (1) for fogged lye is installed Flue gas pipeline center before Venturi tube mixer (2) upper inlet port, described Venturi tube mixer (2) Bottom is arranged in described cylinder (4) and is positioned at the center of cylinder (4), described cylinder (4) upper end closed, cylinder The top of body (4) is provided with gas outlet, and the lower end of cylinder (4) is connected with described vertebral body (5)；Described cylinder (4) is circle Tube structure, its interior diameter is more than the diameter of described Venturi tube mixer (2) lower surface；Wherein said cylinder (4) The flow velocity vi m/s of import is calculated as follows:

$\mathrm{vi}=\sqrt{2\mathrm{\Δp}}/\sqrt{\mathrm{\ϵ\ρ}}---\left(V\right)$

Δ p-allowable pressure drop, Pa,

ρ-smoke density, kg/m^3,

ε-resistance coefficient,

Cylinder (4) import sectional area A m²It is calculated as follows:

A=Q_y/3600vi (VI)

Q_y-flue gas and the atomization gas actual flow by pipeline section, m³/ h,

Barrel diameter D m is calculated as follows:

$D=2.22\sqrt{A}---\left(\mathrm{VII}\right).$

The equipment of pesticides packaging castoff burning vent gas treatment the most according to claim 1, it is characterised in that described mist Change nozzle (1) to be connected by flange is fixing with flue gas pipeline or Venturi tube mixer (2).

The equipment of pesticides packaging castoff burning vent gas treatment the most according to claim 1, it is characterised in that described mist Changing nozzle (1) is dual-medium nozzle, and its entrance carries pipe with atomizing medium pipe and alkali liquor respectively and is connected.

The equipment of pesticides packaging castoff burning vent gas treatment the most according to claim 1, it is characterised in that described vertebra Body (5) is the upper surface area hollow cone platform structure more than lower surface area.

The equipment of pesticides packaging castoff burning vent gas treatment the most according to claim 1, it is characterised in that described The outside of cylinder (4) and/or vertebral body (5) is provided with bracing frame (6).

The equipment of pesticides packaging castoff burning vent gas treatment the most according to claim 1, it is characterised in that described literary composition The caliber D of venturi blender (2)_yMm is calculated as follows:

$D_y=18.8\×\sqrt{\frac{Q_y}{v}}---\left(I\right)$

Q_y-flue gas and the atomization gas actual flow by pipeline section, m³/ h,

V-flue gas and the atomization gas flow velocity by pipeline section, m/s；

The resistance Py Pa of described Venturi tube mixer (2) is calculated as follows:

Py=0.6 × 10^-4v_r ²L (II)

v_r-flue gas and the atomization gas flow velocity by trunnion, m/s,

L-liquid air volume ratio, L/m³。

The equipment of pesticides packaging castoff burning vent gas treatment the most according to claim 1, it is characterised in that described mist Change the blast tube diameter D of nozzle (1)_zMm is calculated as follows:

Q_z-flux of alkaline liquor, kg/h,

ρ_zThe density of-alkali liquor；

v_z-alkali liquor flow velocity；

The atomization radius r mm that atomizer (1) sprays is calculated as follows:

$r=\frac{0.209}{\mathrm{\ρ\Δi}}\×{10}^6---\left(\mathrm{IV}\right)$

Propellant density when ρ-expansion ends, m³/kg；

Before and after Δ i-expands eventually, propellant ratio can land, Δ i=i₁-i₂, kJ/kg.