CN204996307U - Ozone Oxidation and Ammonia Spray Combined Desulfurization and Denitrification Device for Industrial Flue Gas - Google Patents

Abstract

The utility model relates to the control of air pollution, and provides a combined desulfurization and denitrification device for ozone oxidation and ammonia spraying of industrial flue gas, which uses ozone and ammonia water to form a two-stage circulating spray in the spray tower to simultaneously remove the pollutants from the flue gas. of nitrogen-sulfur compounds. In the device of the present utility model, the strong oxidizing property of ozone is used to convert the nitric oxide in the flue gas into nitrogen dioxide, and then the spray tower is divided into two stages and the ammonia water is used to spray it circularly. The utilization rate is very high, and the desulfurization and denitrification actions can be realized simultaneously, and the efficiency is relatively high. The concentration of the carried solution in the flue gas is very low, and no white smoke will be produced. It can fully meet the national emission standards, and the structure of the device is relatively simple. , less floor space and lower investment costs.

Description

Ozone Oxidation and Ammonia Spray Combined Desulfurization and Denitrification Device for Industrial Flue Gas

technical field

The utility model relates to the field of air pollution control, in particular to a combined desulfurization and denitrification device for ozone oxidation and ammonia spraying of industrial flue gas.

Background technique

Industrial flue gas usually contains a variety of pollutants, such as sulfur dioxide, nitrogen oxides, dust and heavy metals adhering to the dust, dioxins and other substances, and the moisture in the flue gas will also carry some soluble inorganic salts. The existing flue gas treatment system mainly deals with single pollutants. For such complex flue gas characteristics, the flue gas treatment system is also very complicated, and has the disadvantage of being difficult to respond to load changes in time.

For the removal of sulfur dioxide, the limestone-gypsum method or the ammonia-ammonium sulfate method are commonly used in engineering, but both systems are difficult to deal with nitrogen oxides, and there is a serious phenomenon of alkaline droplets in the outlet flue gas, causing environmental damage Secondary pollution. For the removal of nitrogen oxides, the traditional methods mainly include selective catalytic reduction and selective non-catalytic reduction. Although the former has high efficiency, it has problems such as catalyst poisoning and ammonia leakage, and the latter has low efficiency. , which is suitable for problems with high temperature and narrow temperature window range.

When there are sulfur dioxide and nitrogen oxides in the flue gas at the same time, there are a series of problems such as the mutual influence of the two processes, high energy consumption and operating costs, large floor space, and high equipment investment for the separate treatment of sulfur dioxide and nitrogen oxides.

In order to solve the above problems, the Chinese Utility Model Patent Specification with the notification number CN101934191 proposes a "Method for Simultaneous Desulfurization and Denitrification of Ammonia Flue Gas", which uses ammonium sulfite and ammonium bisulfite as reducing agents to reduce nitrogen oxides to Nitrogen, but this method has limited reducing ability, slow reaction speed, low removal efficiency, and cannot solve the droplet carrying problem of the wet removal system.

Utility model content

The purpose of the utility model is to provide a combined desulfurization and denitrification device for ozone oxidation and ammonia spraying of industrial flue gas, which aims to solve the problem of low efficiency of the existing flue gas desulfurization and denitrification devices.

The utility model is achieved in that:

The utility model provides a combined desulfurization and denitrification device for ozone oxidation and ammonia spraying of industrial flue gas, which includes a spray tower for introducing undesulfurized and denitrified flue gas and a cooling tower for discharging flue gas after desulfurization and denitrification. The flue gas outlet of the spray tower communicates with the flue gas inlet of the cooling tower, the cooling tower is provided with a water eliminator for removing the solution contained in the flue gas, and the spray tower includes vertically arranged The spray spaces on the two floors are separated by a demister, the spray spaces below and above the spray spaces are respectively provided with a first spout for spraying ammonia water and a The second spout, the bottom of the spray space below is provided with a first storage chamber for collecting the reacted mixed solution, between the first storage chamber and the first spout is provided with a The mixed solution in the room is led to the first conduit at the first nozzle; the spray space above is provided below the second nozzle for collecting the mixed solution generated after spraying and can be unidirectionally conducted from bottom to top An air distribution plate, a second conduit for guiding the mixed solution on the air distribution plate to the second nozzle is provided between the air distribution plate and the second nozzle; the spray tower is below An air inlet for introducing oxidized flue gas is opened in the spraying space, and the air inlet is located below the first nozzle.

The utility model has the following beneficial effects:

In the device of the utility model, the strong oxidizing property of ozone is used to convert the nitric oxide in the flue gas into nitrogen dioxide, and then the flue gas is sprayed circularly with ammonia water in the spray tower, so that the desulfurization and denitrification actions can be realized synchronously. At the same time, the spray tower is divided into two stages of spraying to gradually remove nitrogen and sulfur in the flue gas. The two-layer spraying space is an independent cycle spraying mode, which makes the concentration of the solution carried in the flue gas very low, which not only alleviates the wet process The white smoke phenomenon of the desulfurization system also reduces equipment corrosion. The desulfurization efficiency and denitrification efficiency can reach more than 95%, and the droplet removal rate can reach more than 70%. The flue gas treated by this device fully meets the national emission standards, and the The device not only occupies a small area, but also has a relatively simple overall structure. The solution generated during the process has less corrosion on the device, which is conducive to the diffusion of smoke.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a combined desulfurization and denitrification device for ozone oxidation of industrial flue gas and ammonia spraying provided by an embodiment of the utility model.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Fig. 1, the embodiment of the utility model provides a combined desulfurization and denitrification method of industrial flue gas by ozone oxidation and ammonia spraying, mainly using the spray tower 1 to remove nitrogen and sulfur in the flue gas by spraying , for the spray tower 1, it can be divided into two spray spaces 11 in the vertical direction, and the two spray spaces 11 are separated by a demister 3, and the demister 3 can realize gas-liquid separation function, the specific process steps are as follows:

Collect flue gas. The flue gas here mainly refers to industrial flue gas, which contains a large amount of sulfur dioxide and nitrogen oxides (especially nitric oxide) that are harmful to the human body. Inject process water and ozone into the flue gas, and the process water can It plays the role of humidifying flue gas, while ozone has strong oxidizing properties, and can oxidize nitric oxide in flue gas to form nitrogen dioxide. The molar ratio between nitric oxide and ozone ranges from 0.8 to 1.5 , can be specifically 1.1, so that a higher oxidation efficiency can be formed. Generally, ozone is generated by an ozone generator 144, and the temperature of the collected flue gas is between 100-250°C. When the ozone is mixed with the flue gas, the flue gas The temperature of the air is also between 110-240°C;

The oxidized flue gas is continuously introduced into the spray space 11 located below the spray tower 1, and ammonia water is used to spray the flue gas in the vertical direction. Since the flue gas has a relatively high temperature, it moves from bottom to top, In this regard, the flue gas inlet of the spray tower 1 should be located below the ammonia water spraying position, so that there is sufficient contact between the flue gas and the ammonia water. At the same time, ammonia water also reacts with sulfur dioxide and nitrogen dioxide in the flue gas to generate ammonium nitrate solution and ammonium sulfate solution, and the mixed solution of the two solutions and part of ammonia water is collected in the spray At the bottom of the space 11, the water pump 4 etc. can be used to extract the mixed solution to the spraying place of the spraying space 11 for spraying again, so that a circular spraying is formed in the spraying space 11 below, which can greatly improve the spraying effect. The utilization rate of ammonia water in the process and the desulfurization and denitrification efficiency of flue gas;

Due to the movement of the flue gas from bottom to top, in the above-mentioned desulfurization and denitrification process, the flue gas gradually passes through the demister 3 between the two spray spaces 11, of course, there are still some nitrogen dioxide and nitrogen dioxide in the flue gas. There is no chemical reaction of sulfur dioxide, that is, the flue gas needs to be desulfurized and denitrified again, and in the process of passing through the mist eliminator 3, the water vapor in the spray space 11 below is difficult to absorb due to the separation effect of the mist eliminator 3 into the upper spray space 11, and ammonia water is also used in the upper spray space 11 to spray the flue gas entering the spray space 11, and the mixed solution produced after spraying is collected in the spray space 11, and at the same time The mixture collected by the water pump 4 etc. is easy to spray again at the spraying place of the spraying space 11, so that it circulates successively, and a circulating spraying is also formed in the spraying space 11 above, which can greatly improve the ammonia water in the spraying process. The utilization rate and the desulfurization and denitrification efficiency of flue gas;

When the flue gas continues to rise along the upper spray space 11, the flue gas can be guided from the spray tower 1 to the cooling tower 2, and after being cooled by the cooling tower 2, the flue gas is finally removed by the water eliminator 21 in the cooling tower 2 The liquid droplets contained in the flue gas are discharged to the outside. Of course, when the flue gas is guided from the spray tower 1 to the cooling tower 2, another demister 3 can be installed between the two, that is, it is located in the upper spray space. When the flue gas in 11 floats away, the mist eliminator 3 can also play the role of isolating water vapor, while the water eliminator 21 can remove the liquid droplets contained in the flue gas itself.

In the above process, it can play the role of synchronous desulfurization and denitrification, and at the same time, the dust and dioxins contained in the flue gas can be removed through the spraying action, and the whole process is basically completed in the spray tower 1, which simplifies the process process, reduce floor space, reduce operating costs and equipment investment, and the project is simple to implement, and can be used for new projects and existing project renovations; the other two spray spaces 11 are independent of each other, thus forming a two-stage desulfurization of flue gas Denitrification, which removes sulfur dioxide in the flue gas step by step, improves the removal efficiency of sulfur dioxide, and at the same time reduces the concentration of droplets carried by the flue gas through the demister 3, so that the discharged flue gas basically does not contain sulfate; and In the above process, ozone is used to oxidize nitrogen monoxide in the flue gas to nitrogen dioxide, and ammonia water is used to absorb nitrogen dioxide, which significantly improves the removal efficiency of nitrogen oxides in the original wet desulfurization system; further, due to the two The spraying space 11 of each layer is sprayed in the way of independent circulation, which makes the concentration of droplets carried in the flue gas very low, which not only alleviates the white smoke phenomenon of the wet desulfurization system, but also reduces equipment corrosion and reduces the equipment investment.

For the method of collecting the mixed solution in the spray space 11 above, an air distribution plate 111 can be installed horizontally in the spray space 11. The air distribution plate 111 is a one-way valve, and the smoke can flow along the bottom-up The direction passes through the air distribution plate 111, and when the mixture is easy to fall on the air distribution plate 111 under the action of gravity, the mixed solution cannot penetrate the air distribution plate 111, thereby forming the one-way conduction function of the air distribution plate 111. Of course, when mixing When the solution is accumulated on the air distribution plate 111, the water pump 4 etc. is used to pump it to the ammonia water spraying place for circular spraying. Specifically, an accommodation space can be set outside the spray space 11, so that the water on the air distribution plate 111 All the mixed solutions are pumped into the accommodation space for storage, so as to prevent the accumulation of too much mixed solution on the air distribution plate 111 and prevent the smoke from passing through the air distribution plate 111 .

To optimize the above embodiment, the cooling method for the flue gas in the cooling tower 2 can also be provided with at least one spray layer 22 along the vertical direction in the cooling tower 2, and the flue gas enters the cooling tower from a slightly lower position of the cooling tower 2 2, so that the flue gas passes through each spray layer 22 sequentially from bottom to top. Of course, the water eliminator 21 in the cooling tower 2 is set above each spray layer 22, that is, the flue gas passes through each spray layer 22 first. After the spraying layer 22 is sprayed, it is dehydrated and discharged to the outside by the water eliminator 21. Through the action of each spraying layer 22 of the cooling tower 2, not only the solution contained in the flue gas can be reduced, but also the smoke can be effectively reduced by this flushing and spraying. air temperature. Usually the top of the cooling tower 2 is a chimney 23, the flue gas is discharged to the outside from the chimney 23, and the water eliminator 21 is placed horizontally in the chimney 23, and the flue gas can only be discharged to the outside after the dehydration of the water eliminator 21 , and when the flue gas enters the water eliminator 21, the water eliminator 21 makes the flue gas rotate, and the moisture or solution contained in the flue gas can be directly thrown out under the action of centrifugal force.

Continuing to optimize the above embodiment, the mixed solution formed after passing through the spray layers 22 is also collected at the bottom of the cooling tower 2, and then the collected mixed solution is pumped to each spray layer 22 by water pump 4 etc. for circulating spraying. In this embodiment, the effect of circulating spray is also formed in the cooling tower 2, so that the cooling efficiency of the 2 degree flue gas of the cooling tower can be effectively improved. In addition, the mixed solution collected at the bottom of the cooling tower 2 can also be cooled first, and then the cooled mixed solution is extracted to each spray layer 22 for circulating spraying, that is, the mixed solution is cooled first, and the mixed solution that reduces the temperature can The flue gas has a better cooling effect. For the way of cooling treatment, the mixed solution can also be extracted to a chamber first, and then the air flow in the chamber is accelerated by using a fan 251 etc. in the chamber to realize the cooling effect of the mixed solution, usually mixed in the cooling tower 2 The temperature of the solution is 45-55°C, and after cooling, it is between 38-45°C.

Further, in the process of spraying, it is necessary to detect the density of the mixed solution collected in the upper spray space 11 and the density of the mixed solution collected in the cooling tower 2, and when the mixed solution collected in the upper spray space 11 When the density of the mixed solution collected in the cooling tower 2 is not less than 1.20×10 ³ kg/m ³ , it needs to be pumped to the bottom of the spray space 11 below. Similarly, when the density of the mixed solution collected in the cooling tower 2 is not less than 1.10×10 ³ kg/m ³ , and pump it to the bottom of the lower spray space 11, that is, to collect the mixed solution that meets the above requirements, and when it is detected that the density of the mixed solution collected in the lower spray space 11 is not less than 1.35×10 ³ kg/m ³ When the mixed solution is extracted and crystallized, the ammonium nitrate and ammonium sulfate crystals in the mixed solution can be obtained, which can be used to produce pesticides and fertilizers.

The embodiment of the utility model provides a combined desulfurization and denitrification device for ozone oxidation and ammonia spraying of industrial flue gas, which can be applied to the above-mentioned desulfurization and denitrification process, including a spray tower 1 and a cooling tower 2. The flue gas is introduced into the spray tower 1 for desulfurization and denitrification process, and then the desulfurized and denitrified flue gas is introduced into the cooling tower 2 for cooling treatment, and then discharged to the outside by the cooling tower 2. For this, the flue gas from the spray tower 1 needs to be The gas outlet is connected to the flue gas inlet of the cooling tower 2. Usually, when the flue gas is discharged to the outside, the solution contained in the flue gas needs to be removed. Therefore, a water eliminator 21 is provided in the cooling tower 2. Device 21 removes the solution contained in the flue gas. Of course, when the flue gas enters the cooling tower 2 from the spray tower 1, a demister 3 can also be arranged in the connecting channel between the two, so that the spray tower 1 It is difficult for the mist generated in the upper spraying space 11 to enter the cooling tower 2 , that is, the spraying tower 1 will not interfere with the cooling tower 2 . Specifically refine the spray tower 1, the spray tower 1 includes two layers of spray spaces 11, the two layers of spray spaces 11 are arranged in the vertical direction, and a demister 3 is used to separate the two. The lower spraying space 11 and the upper spraying space 11 are respectively provided with a first spout 112 and a second spout 113, both spouts can spray ammonia water downwards, and further set at the bottom of the lower spraying space 11 There is a first storage chamber 12, which can collect the mixed solution generated after spraying ammonia water to the flue gas in the spray space 11 by itself, and connect the first storage chamber 12 and the first nozzle 112 through a first conduit 121. Connected, the first conduit 121 can guide the mixed solution collected in the first storage chamber 12 to the first nozzle 112, and then form a circular spray at the first nozzle 112, and it is also useful to set it in the upper spray space 11. The air distribution plate 111 that collects the mixed solution generated after the second nozzle 113 sprays the flue gas, the air distribution plate 111 is located below the second nozzle 113, and conducts in a one-way direction from bottom to top, specifically the one-way conduction of flue gas , similar to the one-way valve structure, the mixed solution collected in the upper spray space 11 all falls on the air distribution plate 111, and will not penetrate the air distribution plate 111, while the smoke can pass through the air distribution plate 111 to the top of the air distribution plate 111, the second conduit 131 connected to the second nozzle 113 is also provided at the air distribution plate 111, and the mixed solution at the air distribution plate 111 can be guided to the second nozzle 113 through the second conduit 131 Circular spraying. Generally, the spray tower 1 is provided with an air inlet at the lower spray space 11, and the flue gas oxidized by ozone can enter the lower spray space 11 through the air inlet. Of course, the air inlet should be located at the first The bottom of the first nozzle 112, so that the ammonia water sprayed at the first nozzle 112 can fully contact the nitrogen dioxide and sulfur dioxide in the flue gas.

In this embodiment, the temperature of the flue gas oxidized by ozone is between 110-240°C, which belongs to hot air. For this, the flue gas moves vertically upward under normal conditions. When it is strongly oxidized, it will generate nitrogen dioxide After the flue gas is guided into the spray space 11 below along the air inlet, ammonia water is sprayed at the first nozzle 112. The ammonia water can not only wash away the dust and dioxins contained in the flue gas, but also can Nitrogen dioxide and sulfur dioxide in the flue gas react chemically to form ammonium nitrate and ammonium sulfate solutions, thereby achieving desulfurization and denitrification effects on the flue gas. At the same time, the first conduit 121 draws the mixed solution generated after spraying to the first nozzle 112 Circular spraying, so that the solution sprayed from the first nozzle 112 can have sufficient contact with the flue gas in the spraying space 11, which not only helps to improve the utilization rate of ammonia water, but also greatly improves the desulfurization and denitrification of flue gas Efficiency, of course, due to the upward movement of the flue gas, during the spraying process of the first nozzle 112, the flue gas gradually continues to pass through the demister 3 at the two-layer spray space 11 and rises into the upper spray space 11, while At this time, the demister 3 can isolate the water vapor in the spray space 11 below, so that the solution mist in the spray space 11 below is difficult to enter the spray space 11 above, when the smoke enters the spray space 11 above , because the lower spray space 11 is impossible to achieve complete desulfurization and denitrification of the flue gas, that is, when the flue gas enters the upper spray space 11, there is still a small amount of nitrogen and sulfur compounds mixed in it, and in this embodiment it is located at the upper The second nozzle 113 in the spray space 11 can form a circular spray on the flue gas again, so as to further strengthen the desulfurization and denitrification effect on the flue gas. Independent circulating spraying is carried out through the two-layer spraying space 11 in this embodiment to form a two-stage desulfurization and denitrification process, which not only improves the work efficiency, but also reduces the carryover concentration of the solution in the flue gas, that is, after being treated by the desulfurization and denitrification device The nitrogen and sulfur content of the flue gas is very low, which meets the emission requirements. On the whole, the structure of the device is relatively simple, and the occupied area is small, so that the investment cost thereof can be greatly reduced.

Further, a section of air guide pipe 14 extends outwards from the air inlet of spray tower 1, and a first inlet pipe 141, a second inlet pipe 142, and a first inlet pipe 141, a second inlet pipe 142, and The third inlet pipe 143, for the first inlet pipe 141, can be used to introduce flue gas into the air duct 14, while the second inlet pipe 142 can be used to inject process water, and the third inlet pipe 143 is used to introduce ozone into the air duct 14 , and the opening of the first inlet pipe 141 is facing the opening of the third inlet pipe 143, and is opposite to the opening of the second inlet pipe 142. Of course, the opening of the first inlet pipe 141, the opening of the second inlet pipe 142 and Openings of the third inlet pipe 143 are located in the air duct 14 . In this embodiment, the flue gas is filled into the air guide pipe 14 through the opening of the first inlet pipe 141, and the process water is injected into the air guide pipe 14 through the opening of the second inlet pipe 142, and then can be passed through the opening of the third inlet pipe 143. The ozone produced by the ozone generator 144 is introduced into the air duct 14. In the air duct 14, the process water can play the role of humidifying the flue gas, while the ozone is still in the air duct 14 and the nitric oxide in the flue Oxidation reaction occurs, so that nitrogen monoxide in the flue gas generates nitrogen dioxide in the air guide pipe 14, and after the reaction is complete, it enters the spray space 11 below through the air inlet of the spray tower 1. Generally, the flue gas is a dry gas when it is introduced into the air duct 14, and its moving speed is relatively fast. For this, the opening of the first inlet pipe 141 is opposite to the opening of the second inlet pipe 142, so that the flue gas and process water enter the air duct 14 The direction inside is just the opposite, and the flue gas has sufficient contact with the process water, so that the nitric oxide and ozone in the flue gas can fully react.

Optimize the collection structure of the upper spray space 11 in the spray tower 1. The spray tower 1 also has a second storage room 13. When the mixed solution generated after spraying falls on the air distribution plate 111, the mixed solution can flow automatically. In the second storage chamber 13, the second storage chamber 13 is connected in series with the second conduit 131, and the mixed solution collected in the second storage chamber 13 can be drawn to the second spout 113 through the second conduit 131 Circular spraying. In this embodiment, a second storage chamber 13 is added to pre-store the mixed solution collected on the air distribution plate 111. After the solution falls on the air distribution plate 111, it directly flows into the second storage chamber 13, so that the air distribution plate 111 There will be no accumulation of too much mixed solution, thereby preventing the mixed solution from blocking the smoke entering the upper spray space 11 from the lower spray space 11, that is, ensuring that the smoke can pass through the air distribution plate 111 smoothly from bottom to top .

To further optimize the structure in the cooling tower 2, for the cooling method of the cooling tower 2 to the flue gas, at least one spray layer 22 can be arranged in the vertical direction in the cooling tower 2, and the flue gas inlet of the cooling tower 2 is located at each Below the spray layer 22, while the flue gas outlet of the cooling tower 2 is located above each spray layer 22, the water eliminator 21 is arranged near the flue gas outlet of the cooling tower 2, the flue gas outlet is usually a chimney 23, The water eliminator 21 is horizontally embedded in the chimney 23, and the flue gas passes through the water eliminator 21 before being discharged to the outside. In this embodiment, a multi-layer spray structure is also added in the cooling tower 2. When the flue gas after desulfurization and denitrification enters the cooling tower 2, each spray layer 22 sprays cooling water in a vertical downward direction, and the flue gas After the gas is sprayed with cooling water, the temperature can be lowered, and at the same time, the small amount of solution contained in the flue gas can be washed away, that is, the multi-layer spraying in the cooling tower 2 can further play the role of decontamination.

Continue to optimize the structure of the cooling tower 2, the bottom of the cooling tower 2 is provided with a third storage chamber 24, the mixed solution formed after each spray layer 22 can be collected by the third storage chamber 24, and simultaneously in the third storage chamber A third conduit 241 is connected in series between 24 and each spray layer 22, and the third conduit 241 can guide the mixed solution collected in the third storage chamber 24 to each spray layer 22 for circulating spraying. Through the matching structure of the third storage chamber 24 and the third conduit 241, the cooling tower 2 forms a structure similar to the circulating spraying in the two-layer spraying space 11 of the spraying tower 1, which not only improves the level of spraying in the cooling tower 2 Water utilization rate, but also can play a better decontamination effect. Usually, a cooling chamber 25 is also connected in series between the third storage chamber 24 and the third conduit 241, that is, the mixed solution collected in the third storage chamber 24 can be led to the cooling chamber 25, and the mixed solution is carried out through the cooling chamber 25. The temperature is lowered, and the mixed solution after cooling is extracted to each spray layer 22 for circulating spraying. When the spray water of each spray layer 22 contacts the flue gas, the temperature of the flue gas decreases, and the temperature of the mixed solution produced at the same time is higher than the temperature of the spray water. The temperature of the sprayed mixed solution is low, so the collected mixed solution is first cooled. For the cooling structure in the cooling chamber 25, a fan 251 is generally arranged on the top of the cooling chamber 25, and the rotation speed of the fan 251 is accelerated. The airflow in the cooling chamber 25 further reduces the temperature of the mixed solution in the cooling chamber 25, and then extracts the cooled mixed solution to each spray layer 22. Usually, the temperature of the mixed solution in the cooling tower 2 is 45-55°C , and after cooling, it is between 38-45°C.

Further, since the flue gas needs to be sprayed through each spray layer 22 in the cooling tower 2, another device for blocking water vapor is also provided between the water eliminator 21 and the uppermost spray layer 22. Demister 3. When each spray layer 22 sprays the flue gas, the cooling tower 2 will be filled with a certain degree of mist, and the mist in the cooling tower 2 can be prevented from entering the water eliminator 21 through the mist eliminator 3, and the mist eliminator 3 It is only necessary to remove part of the liquid droplets carried by the flue gas to ensure that the flue gas discharged from the chimney 23 meets the emission requirements.

In the above structure, the mixed solution in the first storage chamber 12 is extracted to the first nozzle 112, the mixed solution in the second storage chamber 13 is extracted to the second nozzle 113, and the mixed solution in the third storage chamber 24 is extracted to each outlet. The power components of the spraying layer 22 can all adopt water pump 4 etc., can adopt independent mode for the arrangement mode of water pump 4, promptly each pumping action all adopts a water pump 4 to form the structural form of parallel connection, convenient control, certainly also can adopt a Water pump 4 extracts.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (6)

1. the ozone oxidation of an industrial smoke and ammonia process spray combined desulfurization and denitration device, comprise spray column for importing non-desulphurization denitration flue gas and the cooling tower for discharging flue gas after desulphurization denitration, the exhanst gas outlet of described spray column is communicated with the gas approach of described cooling tower, the dehydrater for removing containing solution in flue gas is provided with in described cooling tower, it is characterized in that: described spray column comprises the two-layer described spray space vertically arranged, demister is adopted to separate between two-layer described spray space, the first spout for spraying ammoniacal liquor and the second spout is respectively arranged with in described spray space, below and described spray space, top, the bottom in described spray space, below is provided with the first reception room for collecting reacted mixed solution, be provided with for mixed solution in described first reception room is directed at the first conduit of described first nozzle between described first reception room and described first spout, described spray space, top is provided with for generating mixed solution after collecting spray and along the air distribution plate of direction one-way conduction from the bottom to top, can being provided with the second conduit for mixed solution on described air distribution plate being directed at described second nozzle between described air distribution plate and described second spout in the below of described second spout, in below, described spray space place offers the air inlet for importing the rear flue gas of oxidation to described spray column, and described air inlet is positioned at below described first spout.

2. the ozone oxidation of industrial smoke as claimed in claim 1 and ammonia process spray combined desulfurization and denitration device, it is characterized in that: be outward extended with wireway by described air inlet, described wireway is interval with the first inlet pipe for importing flue gas along the direction near described spray column, for the second inlet pipe of introducing technology water and the 3rd inlet pipe for importing ozone, the opening of described first inlet pipe towards with the opening of described 3rd inlet pipe towards identical and towards the opposite with the opening of described second inlet pipe, the opening of described first inlet pipe, the opening of described second inlet pipe and the opening of described 3rd inlet pipe are all positioned at described wireway.

3. the ozone oxidation of industrial smoke as claimed in claim 1 and ammonia process spray combined desulfurization and denitration device, it is characterized in that: also comprise for depositing the second reception room described air distribution plate being collected mixed solution, described second reception room is serially connected with on described second conduit.

4. the ozone oxidation of the industrial smoke as described in any one of claim 1-3 and ammonia process spray combined desulfurization and denitration device, it is characterized in that: in described cooling tower, be vertically provided with at least one deck spraying layer, the gas approach of described cooling tower is positioned at the below of each described spraying layer, and the exhanst gas outlet of described cooling tower is positioned at the top of each described spraying layer.

5. the ozone oxidation of industrial smoke as claimed in claim 4 and ammonia process spray combined desulfurization and denitration device, it is characterized in that: being provided with the 3rd reception room for collecting the rear mixed solution formed of spray in the bottom of described cooling tower, being provided with between described 3rd reception room and each described spraying layer for mixed solution in described 3rd reception room is directed at the 3rd conduit at each described spraying layer place.

6. the ozone oxidation of industrial smoke as claimed in claim 5 and ammonia process spray combined desulfurization and denitration device, it is characterized in that: be serially connected with the cooling chamber for cooling and mixing solution between described 3rd conduit and described 3rd reception room.