CN212315613U

CN212315613U - Reduce desulfurization waste water concentrate processing apparatus that shower nozzle blockked up

Info

Publication number: CN212315613U
Application number: CN202020307192.1U
Authority: CN
Inventors: 李钦武; 罗佳; 郑政杰; 张淼; 陆英伟; 郑贤明; 黄豪
Original assignee: Zhejiang Hope Environmental Protection Engineering Co ltd
Current assignee: Zhejiang Hope Environmental Protection Engineering Co ltd
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2021-01-08
Anticipated expiration: 2030-03-12

Abstract

The utility model discloses a reduce desulfurization waste water concentrate processing apparatus of shower nozzle jam belongs to the environmental protection device field, including two fluid spray guns, two fluid spray guns' shower nozzle is located the evaporation to dryness flue, jet pump and gas-water mixer are connected respectively to two imports of two fluid spray guns, the jet pump links to each other with desulfurization waste water concentrate accumulator, the one end and the compressed air storage tank of gas-water mixer link to each other, still are equipped with fine atomizing nozzle in the gas-water mixer, fine atomizing nozzle links to each other with the humidification water pump, through the humidification water pump can carry out the humidification to compressed air to increase the moisture content of shower nozzle department desulfurization waste water concentrate, thereby slow down the time of moisture evaporation to dryness, avoid the particulate matter to separate out at the excessive speed and lead to the shower nozzle jam, solved the easy problem that blocks up of shower nozzle among the prior art.

Description

Reduce desulfurization waste water concentrate processing apparatus that shower nozzle blockked up

Technical Field

The utility model relates to an environmental protection device especially relates to a reduce desulfurization waste water concentrate processing apparatus that shower nozzle blockked up.

Background

A limestone-gypsum method is largely adopted in the desulfurization process of thermoelectric units in China, and a certain amount of desulfurization wastewater can be generated by the process. At present, effective treatment methods include chemical methods of neutralization, flocculation and precipitation and zero-discharge methods of concentrated and evaporated wastewater according to the characteristics of the desulfurization wastewater. The concentrated wastewater in the wastewater zero discharge method has the characteristics of high salinity and containing large-age fine gypsum particle suspended matters, is atomized by using a double-fluid spray gun and then is sprayed into a drying flue, and in the process, the water in the atomized mixture is quickly dried by high-temperature flue gas at the outlet of a nozzle, so that the nozzle is easy to scale, the atomization effect of the spray gun is reduced, a large amount of wet blocks are formed in the drying flue and a downstream electric precipitator, the blockage and the corrosion are caused, and the operation of a unit is seriously influenced.

For example, the "desulfurization wastewater treatment system" disclosed in the chinese patent literature, which is published under the publication number CN206645857U, includes a fine atomizing nozzle and a steam drying tower, and has a disadvantage that when the desulfurization wastewater leaves from the fine atomizing nozzle, water is rapidly evaporated to dryness, resulting in rapid precipitation of particles in the desulfurization wastewater, thereby resulting in a nozzle structure, reducing the atomizing effect of a spray gun, resulting in formation of a large amount of wet lumps in a steam drying flue and a downstream electric precipitator, causing blockage and corrosion, and seriously affecting the operation of a unit.

Disclosure of Invention

The invention aims to solve the problem that a spray head is easy to block in the process of spraying desulfurization wastewater in the prior art, and provides a desulfurization wastewater concentrated solution atomization device which can avoid the spray head from being blocked by slowing down the speed of evaporating water at the spray head.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model discloses, a reduce desulfurization waste water concentrate processing apparatus of shower nozzle jam, including two fluid spray guns, two fluid spray guns's shower nozzle is located the evaporation to dryness flue, jet pump and gas-water mixer are connected respectively to two imports of two fluid spray guns, the jet pump links to each other with desulfurization waste water concentrate accumulator, the one end of gas-water mixer links to each other with the compressed air storage tank, still is equipped with fine atomizing nozzle in the gas-water mixer, fine atomizing nozzle links to each other with the humidification water pump.

The temperature in the evaporation flue is between about 100 ℃ and 140 ℃, the content of water in the desulfurization waste water concentrated solution is very low, when the desulfurization waste water concentrated solution is sprayed out from a spray head of a spray gun, the particle size of atomized water is very small, the water contained in the atomized water can be evaporated to dryness quickly, particle suspended matters in the concentrated solution are directly separated out at the spray head, and the spray head is blocked; the fine atomizing nozzle in the gas-water mixer can make the humidified water uniformly dispersed in the compressed air.

Preferably, the two-fluid spray gun comprises a spray head and a gun body, a main channel and a gas channel are arranged in the gun body, the main channel is connected with the gas channel through a connecting channel, an impeller is arranged in the main channel, a plurality of blades are arranged on the impeller, and the connecting channel faces the blades of the impeller; the desulfurization waste water concentrated solution is introduced from the main channel, the gas-water mixture formed by the compressed air and the humidifying water is introduced from the gas channel, when the gas-water mixture enters the main channel from the connecting channel, the blades of the impeller in the connecting channel can be blown, so that the impeller rotates, and in the rotating process of the impeller, the desulfurization waste water concentrated solution and the gas-water mixture in the main channel can be mixed, so that the humidifying water is uniformly dispersed into the desulfurization waste water concentrated solution, and partial particles are prevented from being separated out at the spray head due to the fact that the concentration of the desulfurization waste water concentrated solution is not uniform.

Preferably, the impeller comprises a forward rotation impeller and a reverse rotation impeller, and the forward rotation impeller and the reverse rotation impeller are arranged in the main channel at intervals; the rotation directions of the forward rotation impeller and the reverse rotation impeller are opposite, so that the movement direction of the desulfurization wastewater concentrated solution in the main channel is continuously changed, and the disorder degree of particle movement is increased, so that the mixing of the desulfurization wastewater concentrated solution and a gas-water mixture is accelerated, the humidifying water is uniformly dispersed into the desulfurization wastewater concentrated solution, and partial particles are prevented from being separated out at the spray head due to the fact that the concentration of the desulfurization wastewater concentrated solution is not uniform.

Preferably, the included angle between the blades of the impeller and the axial direction of the impeller is 10-40 degrees, the plane where the blades are located is not coincident with the axial direction of the impeller but has a certain angle, so that the desulfurization waste water concentrated solution in the main channel can be pushed forwards like a fan in the rotating process of the impeller, the desulfurization waste water concentrated solution can be accelerated continuously in the main channel, and the problem that the spraying speed of the desulfurization waste water concentrated solution at a spray head is insufficient due to the fact that a gun body is too long is solved; too small an angle will result in insufficient force to accelerate the desulfurization wastewater concentrate, and too large an angle will result in insufficient force to push the impeller to rotate when the gas-water mixture enters the main channel.

Preferably, the spray head is provided with an atomization hole, the evaporated flue gas flows to the dust remover from the air preheater, and the atomization hole is positioned on one side of the spray head, which faces the dust remover; the atomization holes are not opposite to the direction of the movement of the gas in the evaporation flue but opposite to the air preheater, so that the phenomenon that the evaporation speed of the desulfurization wastewater concentrated solution at the spray head is too high due to the fact that high-temperature gas in the evaporation flue is directly blown to the spray head can be avoided.

Preferably, a horn-shaped spray head protective sleeve is arranged outside the spray head; the spray head sheath can prevent the high-temperature gas in the evaporated flue from fully contacting with the concentrated desulfurization wastewater at the spray head to cause the water in the concentrated desulfurization wastewater to be quickly evaporated; the nozzle sheath is horn-shaped, so that the blockage of the opening of the nozzle sheath by particles separated out from the desulfurization wastewater concentrated solution can be avoided.

Preferably, a check valve is connected between the humidifying water pump and the fine atomizing nozzle, compressed air is introduced into the air-water mixer, so that the internal pressure is high, and when the pressure at the humidifying water pump is insufficient, the check valve can prevent the compressed air in the air-water mixer from flowing backwards.

Therefore, the utility model discloses following beneficial effect has: (1) the water content of the desulfurization wastewater concentrated solution is increased when the desulfurization wastewater concentrated solution is sprayed out, the evaporation speed is reduced, and the spray head is not easy to be blocked due to rapid evaporation at the spray head; (2) the desulfurization waste water concentrated solution and the gas-water mixture are mixed more uniformly, so that the concentration of the desulfurization waste water concentrated solution is ensured to be more uniform; (3) when the impeller rotates, the concentrated solution of the desulfurization wastewater can be pushed forward, so that the over-slow injection speed at the spray head is avoided; (4) the atomized desulfurization wastewater concentrated solution sprayed from the spray head can not directly and fully contact with the high-temperature gas in the evaporation flue, so that the evaporation is slowed down.

Drawings

Fig. 1 is an overall layout of the present invention.

FIG. 2 is a schematic view of one construction of the dual fluid spray gun of the present invention.

FIG. 3 is a cross-sectional view of the two-fluid spray gun of the present invention taken along the section line of FIG. 2A-A.

FIG. 4 is a cross-sectional view of the two-fluid spray gun of the present invention taken along the section line of FIG. 2B-B.

In the figure: 1. the device comprises a humidifying water pump 2, a regulating valve 3, a pressure gauge 4, a flowmeter 5, a check valve 6, a compressed air storage tank 7, a micro-fine atomizing nozzle 8, a gas-water mixer 9, a two-fluid spray gun 91, a spray head 92, a gun body 93, a main channel 94, a gas channel 95, an impeller 96, blades 97, a connecting channel 98, atomizing holes 99, a spray head sheath 10, a desulfurization waste water concentrated solution storage tank 11, a jet pump 12 and a drying flue.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1-4, a desulfurization waste water concentrate atomization anti-blocking device comprises a two-fluid spray gun 9, wherein a spray head of the two-fluid spray gun is positioned in a evaporation flue 12, two inlets of the two-fluid spray gun are respectively connected with a jet pump 11 and a gas-water mixer 8, the jet pump is connected with a desulfurization waste water concentrate storage tank 10, the gas-water mixer is connected with a compressed air storage tank 6 and a humidifying water pump 1, a regulating valve 2, a pressure gauge 3, a flowmeter 4, a check valve 5 and a fine atomization nozzle 7 are sequentially connected between the humidifying water pump and the gas-water mixer, and the fine atomization nozzle is positioned in the gas-water mixer; the double-fluid spray gun comprises a spray head 91 and a gun body 92, wherein a main channel 93 and a gas channel 94 are arranged in the gun body; the main channel is a circular channel and is positioned in the middle of the gun body; the gas channel is an annular channel and is positioned on the outer side of the main channel; the main channel is connected with the gas channel through a connecting channel 97, an impeller 95 is arranged in the main channel, the axial direction of the impeller is consistent with the direction of the main channel, a plurality of blades 96 are arranged on the impeller, and the connecting channel faces to the blades of the impeller; the impeller comprises a forward rotation impeller and a reverse rotation impeller, the forward rotation impeller and the reverse rotation impeller are arranged in the main channel at intervals, the direction of a connecting channel corresponding to the forward rotation impeller is opposite to that of a connecting channel corresponding to the reverse rotation impeller, and air-water mixtures blown from the forward rotation impeller and the reverse rotation impeller can blow the blades from different directions, so that the impeller has different directions; the included angle between the blades of the impeller and the axial direction of the impeller is 10-40 degrees, preferably 30 degrees, and the installation directions of the forward rotation impeller and the reverse rotation impeller are opposite, so that the desulfurization wastewater concentrated solution can be pushed to accelerate towards the same direction when the two impellers rotate; the spray head is provided with atomizing holes 98, the evaporated flue gas flows to the dust remover from the air preheater, the atomizing holes are positioned on one side of the spray head, which faces the dust remover, the spray head is spherical in shape, so that different orientations of the atomizing holes can be ensured, and the sprayed atomized desulfurization wastewater concentrated solution is prevented from being excessively concentrated to form liquid drops, which causes difficulty in evaporation; the nozzle is externally provided with a horn-shaped nozzle sheath 99 which is connected with the nozzle through threads, so that the nozzle sheath can be conveniently detached and can be replaced once the nozzle sheath is seriously corroded.

When the device is used, the compressed air storage tank introduces compressed air into the gas-water mixer, the humidifying water pump sprays water mist into the gas-water mixer so as to form a gas-water mixture and introduce the gas mixture into a gas channel of the two-fluid spray gun, and the desulfurization waste water concentrated solution in the desulfurization waste water concentrated solution storage tank is introduced into a main channel of the two-fluid spray gun through the jet pump; the gas-water mixture enters the main channel from the gas channel through the connecting channel, and blows blades in the main channel when entering the main channel to rotate the impeller, wherein the forward rotation impeller and the reverse rotation impeller which are arranged at intervals rotate in different directions; the impeller stirs the desulfurization wastewater concentrated solution and the gas-water mixture in the main channel in the rotating process, so that the mixing of the desulfurization wastewater concentrated solution and the gas-water mixture is accelerated, and the mixing is more uniform; meanwhile, due to the inclined angle of the blades, the rotation of the impeller can drive the desulfurization wastewater concentrated solution to flow forwards, so that the desulfurization wastewater concentrated solution is accelerated, and the over-slow flow rate of the desulfurization wastewater concentrated solution at the spray head is avoided; when the atomized desulfurization wastewater concentrated solution is sprayed out from the spray head, the atomized desulfurization wastewater concentrated solution is sprayed out from different directions, so that the atomized concentrated solution is prevented from forming liquid drops in a concentrated manner; moreover, as the spray head is opposite to the air preheater, the concentrated solution just sprayed out cannot be immediately and fully contacted with high-temperature gas for drying by distillation, and the spray head sheath can also slow down the drying time of the concentrated solution at the spray head; the temperature change of the gas at the front and rear positions of the spray head can be known by measuring the temperature difference of the gas in the evaporation flue before and after passing through the spray head, and the water quantity flowing out of the humidification water pump can be controlled by the regulating valve and the flow meter, so that the temperature reduction of the gas in the evaporation flue is prevented from being too obvious; the check valve can prevent the compressed air from flowing backwards when the pressure at the humidifying water pump is lower.

Claims

1. The utility model provides a reduce desulfurization waste water concentrate processing apparatus that shower nozzle blockked up, characterized by, includes the two-fluid spray gun, the shower nozzle of two-fluid spray gun is located the evaporation to dryness flue, jet pump and gas-water mixer are connected respectively to two imports of two-fluid spray gun, the jet pump links to each other with desulfurization waste water concentrate accumulator, the one end and the compressed air storage tank of gas-water mixer link to each other, still are equipped with fine atomizing nozzle in the gas-water mixer, fine atomizing nozzle links to each other with the humidification water pump.

2. The desulfurization waste water concentrate treatment device for reducing nozzle clogging according to claim 1, wherein the two-fluid spray gun comprises a nozzle and a gun body, a main passage and a gas passage are arranged in the gun body, the main passage and the gas passage are connected through a connecting passage, an impeller is arranged in the main passage, a plurality of blades are arranged on the impeller, and the connecting passage faces the blades of the impeller.

3. The desulfurization waste water concentrate treatment device for reducing the blockage of the spray head as recited in claim 2, wherein the impeller comprises a forward rotation impeller and a reverse rotation impeller, and the forward rotation impeller and the reverse rotation impeller are arranged at intervals in the main channel.

4. The desulfurization waste water concentrate treatment device for reducing the blockage of the spray head according to claim 2 or 3, wherein the included angle between the blades of the impeller and the axial direction of the impeller is 10-40 degrees.

5. The apparatus as claimed in claim 2, wherein the nozzle has an atomization hole, the evaporated flue gas flows from the air preheater to the dust remover, and the atomization hole is located on a side of the nozzle facing the dust remover.

6. The desulfurization waste water concentrate treatment device for reducing the clogging of the spray head as claimed in claim 5, wherein a horn-shaped spray head sheath is installed outside the spray head.

7. The desulfurization waste water concentrate treatment device for reducing the clogging of the spray head as claimed in claim 1, wherein a check valve is connected between the humidifying water pump and the fine atomizing nozzle.