Nitrogen oxide tail gas treatment system

Abstract

The utility model relates to the field of waste gas treatment, in particular to a nitrogen oxide tail gas treatment system. The utility model provides a nitrogen oxide tail gas treatment system which comprises a condenser, a first-stage hydrogen peroxide bubbling absorption tank connected with a gas outlet of the condenser 4, and a second-stage hydrogen peroxide bubbling absorption tank connected with a gas outlet of the first-stage hydrogen peroxide bubbling absorption tank, according to the nitrogen oxide tail gas treatment device, up-to-standard emission is achieved, the nitrogen oxide tail gas absorption efficiency is effectively improved, and resource utilization of waste gas and waste water is achieved. The whole process system has reliability, practicability and economical efficiency, nitrogen oxide in the tail gas is recycled, the nitrogen oxide is changed into recyclable nitric acid, and resource utilization of waste gas and waste water is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of waste gas treatment, and specifically relates to a nitrogen oxide tail gas treatment system. BACKGROUND

[0002] In the production process of manganese oxide, nitric acid is generally used to dissolve manganese metal, and a large amount of nitric oxide is generated in the dissolution process. A large amount of high-concentration nitrogen dioxide is generated when manganese nitrate is calcined. The methods for treating nitrogen oxides mainly include catalytic reduction, catalytic decomposition, plasma treatment, biological treatment, staged combustion, adsorption, and liquid absorption methods. At present, liquid absorption method is commonly used to treat nitrogen oxide tail gas, and the treatment device is mainly urea injection vacuum unit. However, the urea injection vacuum unit has the problems of low reaction efficiency, high reagent cost, and difficulty in recycling the absorption liquid. With the development of the times, a more green and environmentally friendly treatment process with higher economic benefit is needed to treat high-concentration nitrogen oxide tail gas. SUMMARY

[0003] Therefore, the utility model provides a nitrogen oxide tail gas treatment system, which can effectively improve the nitrogen oxide tail gas absorption efficiency and realize the resource utilization of waste gas and wastewater. The whole process system has reliability, practicality, and economy, greatly reducing the production cost and treatment cost.

[0004] The utility model provides a nitrogen oxide tail gas treatment system, which comprises:

[0005] A condenser 4;

[0006] A first-stage hydrogen peroxide bubble absorption tank 601 connected with the gas outlet of the condenser 4;

[0007] A second-stage hydrogen peroxide bubble absorption tank 602 connected with the gas outlet of the first-stage hydrogen peroxide bubble absorption tank 601;

[0008] A first-stage water jet tower 701 connected with the gas outlet of the second-stage hydrogen peroxide bubble absorption tank 602;

[0009] A second-stage water jet tower 702 connected with the gas outlet of the first-stage water jet tower 701;

[0010] A third-stage water jet tower 703 connected with the gas outlet of the second-stage water jet tower 702;

[0011] A third-stage hydrogen peroxide bubble absorption tank 603 connected with the gas outlet of the third-stage water jet tower 703;

[0012] A fourth-stage water jet tower 704 connected with the gas outlet of the third-stage hydrogen peroxide bubble absorption tank 603;

[0013] a fifth stage water jet tower 705 connected with the air outlet of the fourth stage water jet tower 704;

[0014] a sixth stage water jet tower 706 connected with the air outlet of the fifth stage water jet tower 705;

[0015] a seventh stage water jet tower 707 connected with the air outlet of the sixth stage water jet tower 706;

[0016] a lye spraying tower 8 connected with the air outlet of the seventh stage water jet tower 707.

[0017] In the production process of manganese oxide, nitric acid is generally used to dissolve manganese metal in a dissolving kettle, and a large amount of nitric oxide is generated in the dissolving process and discharged through the air outlet of the dissolving kettle; and a large amount of high-concentration nitrogen dioxide is generated in the calcination of manganese nitrate in a calcining kettle, and discharged through the air outlet of the calcining kettle. The nitrogen oxide tail gas treatment system provided by the utility model is connected with the air outlets of the dissolving kettle 3 and the calcining kettle 2 in the production process of manganese oxide, and can treat the nitrogen oxide tail gas.

[0018] The nitrogen oxide tail gas treatment system comprises a condenser 4; specifically, the condenser 4 is a two-stage condenser, and the condenser 4 is connected with the air outlets of the dissolving kettle 3 and the calcining kettle 2 in the production process of manganese oxide. The nitrogen oxide tail gas treatment system further comprises a demister, the demister is connected before the condenser 4, and the condenser 4 is connected with the air outlet of the demister. Further, the dissolving kettle 3 and the calcining kettle 2 in the production process of manganese oxide are both provided with a demister, the demister of the air outlet of the dissolving kettle 3 is a wire mesh demister, and the demister of the air outlet of the calcining kettle 2 is a cyclone vane demister; the nitrogen oxide tail gas discharged from the air outlets of the dissolving kettle 3 and the calcining kettle 2 is first subjected to demisting by the demisters and then cooled by the condenser 4. The demister and the two-stage condenser used in the utility model can slightly reduce the concentration of nitrogen oxides at the tail gas outlet, reduce the content of solution and particulate matter entrained by the tail gas, reduce the loss of reactant materials, and avoid the entry of materials into the bubbling absorption tank, thereby causing the invalid decomposition of hydrogen peroxide.

[0019] The nitrogen oxide tail gas treatment system disclosed by the utility model includes three-stage hydrogen peroxide bubble absorption tanks and seven-stage water jet towers, and the first-stage hydrogen peroxide bubble absorption tank 601, the second-stage hydrogen peroxide bubble absorption tank 602, the first-stage water jet tower 701, the second-stage water jet tower 702, the third-stage water jet tower 703, the third-stage hydrogen peroxide bubble absorption tank 603, the fourth-stage water jet tower 704, the fifth-stage water jet tower 705, the sixth-stage water jet tower 706 and the seventh-stage water jet tower 707 are sequentially connected with each other through gas outlets.

[0020] The nitrogen oxide tail gas treatment system disclosed by the utility model includes an alkali liquor spray tower 8, which is connected after the seventh-stage water jet tower 707, and is connected with the gas outlet of the seventh-stage water jet tower 707.

[0021] The first-stage hydrogen peroxide bubble absorption tank 601, the second-stage hydrogen peroxide bubble absorption tank 602 and the third-stage hydrogen peroxide bubble absorption tank 603 are provided with absorption liquid flow pipelines; centrifugal pumps 12 are arranged on the absorption liquid flow pipelines, and the centrifugal pumps 12 pump the absorption liquid in the hydrogen peroxide bubble absorption tank in the later stage to the hydrogen peroxide bubble absorption tank in the former stage. Specifically, the first-stage hydrogen peroxide bubble absorption tank 601 and the second-stage hydrogen peroxide bubble absorption tank 602 are provided with an absorption liquid flow pipeline, a centrifugal pump 12 is arranged on the absorption liquid flow pipeline, and the centrifugal pump 12 pumps the absorption liquid in the second-stage hydrogen peroxide bubble absorption tank 602 to the first-stage hydrogen peroxide bubble absorption tank 601; the second-stage hydrogen peroxide bubble absorption tank 602 and the third-stage hydrogen peroxide bubble absorption tank 603 are provided with an absorption liquid flow pipeline, a centrifugal pump 12 is arranged on the absorption liquid flow pipeline, and the centrifugal pump 12 pumps the absorption liquid in the third-stage hydrogen peroxide bubble absorption tank 603 to the second-stage hydrogen peroxide bubble absorption tank 602.

[0022] The utility model discloses a first stage water jet tower 701, second stage water jet tower 702, third stage water jet tower 703, fourth stage water jet tower 704, fifth stage water jet tower 705, sixth stage water jet tower 706 and seventh stage water jet tower 707 between being provided with absorption liquid flow pipe channel, be provided with centrifugal pump 12 on absorption liquid flow pipe channel, and centrifugal pump 12 makes the absorption liquid pump of later stage water jet tower to the former stage water jet tower, specifically, first stage water jet tower 701 and second stage water jet tower 702 between being provided with absorption liquid flow pipe channel, be provided with centrifugal pump 12 on absorption liquid flow pipe channel, and centrifugal pump 12 makes the absorption liquid pump of second stage water jet tower 702 to first stage water jet tower 701, second stage water jet tower 702 and third stage water jet tower 703 between being provided with absorption liquid flow pipe channel, be provided with centrifugal pump 12 on absorption liquid flow pipe channel, and centrifugal pump 12 makes the absorption liquid pump of third stage water jet tower 703 to second stage water jet tower 702, third stage water jet tower 703 and fourth stage water jet tower 704 between being provided with absorption liquid flow pipe channel, be provided with centrifugal pump 12 on absorption liquid flow pipe channel, and centrifugal pump 12 makes the absorption liquid pump of fourth stage water jet tower 704 to third stage water jet tower 703, fourth stage water jet tower 704 and fifth stage water jet tower 705 between being provided with absorption liquid flow pipe channel, be provided with centrifugal pump 12 on absorption liquid flow pipe channel, and centrifugal pump 12 makes the absorption liquid pump of fifth stage water jet tower 705 to fourth stage water jet tower 704, fifth stage water jet tower 705 and sixth stage water jet tower 706 between being provided with absorption liquid flow pipe channel, be provided with centrifugal pump 12 on absorption liquid flow pipe channel, and centrifugal pump 12 makes the absorption liquid pump of sixth stage water jet tower 706 to fifth stage water jet tower 705, sixth stage water jet tower 706 and seventh stage water jet tower 707 between being provided with absorption liquid flow pipe channel, be provided with centrifugal pump 12 on absorption liquid flow pipe channel, and centrifugal pump 12 makes the absorption liquid pump of seventh stage water jet tower 707 to sixth stage water jet tower 706.

[0023] The utility model discloses a special pipeline and centrifugal pump 12 of the next stage tank body absorption liquid pump to the upper stage tank body are arranged to all levels said hydrogen peroxide bubble absorption tank and all levels said water jet tower, because nitrogen oxide absorption process, concentration is gradually reduced, the next stage tank body solution pump to the upper stage tank body, it is favorable to improve the nitric acid concentration in the absorption liquid, accelerate the reuse of nitric acid, improve the economy of whole production line. The design as the part of said nitrogen oxide tail gas treatment system, play the role of recovery absorption liquid simultaneously, convert most of nitrogen dioxide into nitric acid, and the treatment effect is good, and the nitric acid concentration produced can be 40%~50%, can be all reused to the production line, and the economic benefit is high, and there is no secondary pollution. In addition, because the design sets up the special pipeline and centrifugal pump 12 of the next stage tank body solution pump to the upper stage tank body, therefore only need to detect the absorption liquid of first stage hydrogen peroxide bubble absorption tank 601 and first stage water jet tower 701, discharge nitric acid in first stage bubble absorption tank 601 and first stage water jet tower 701, supplement new absorption liquid in third stage bubble absorption tank 603 and seventh stage water jet tower 707, reduce the detection frequency, the automation, standardization, standardization management of production are convenient, and the management cost, detection cost and personnel investment are reduced.

[0024] Further, the spacing between the first stage hydrogen peroxide bubble absorption tank 601 and the second stage hydrogen peroxide bubble absorption tank 602, the spacing between the second stage hydrogen peroxide bubble absorption tank 602 and the first stage water jet tower 701, the spacing between the first stage water jet tower 701 and the second stage water jet tower 702, the spacing between the second stage water jet tower 702 and the third stage water jet tower 703, the spacing between the third stage water jet tower 703 and the third stage hydrogen peroxide bubble absorption tank 603, the spacing between the third stage hydrogen peroxide bubble absorption tank 603 and the fourth stage water jet tower 704 are independently 1.0-1.2 m, preferably 1.0 m; the spacing between the fourth stage water jet tower 704 and the fifth stage water jet tower 705 is 1.0-3.0 m, preferably 3 m; the spacing between the fifth stage water jet tower 705 and the sixth stage water jet tower 706 is 3.0-6.0 m, preferably 5 m; the spacing between the sixth stage water jet tower 706 and the seventh stage water jet tower 707 is 7.0-9.0 m, preferably 8 m; the spacing between the seventh stage water jet tower 707 and the lye spray tower 8 is 50-70 m, preferably 60 m. In the treatment process of nitrogen oxide tail gas, as NO reacts with O2, the concentration of NO gradually decreases, the reaction rate gradually decreases, and the time for the oxidation of NO to form NO2 gradually increases. After the concentration of NO is calculated to be below a certain value, the oxidation rate requires a long time. By controlling the adjacent spacing between each absorption equipment and the adjacent next stage absorption equipment, the residence time of the nitrogen oxide tail gas passing through is controlled, solving the problem of exceeding the standard due to the gradual difficulty in treating the nitrogen oxide tail gas with too low NO concentration in the nitrogen oxide tail gas treatment process.

[0025] Further, the hydrogen peroxide bubble absorption tank is provided with an aeration system, the aeration system is a microporous aeration disc, the aperture of the near-center area of the microporous aeration disc is 50 μm-100 μm, and the aperture of the far-center area of the microporous aeration disc is 100 μm-200 μm.

[0026] Further, the water jet tower is provided with a balance pipe, the pressure of each stage of the water jet tower is balanced, sudden change of the pressure is avoided, the absorption liquid of the upper stage of the water jet tower is prevented from being sucked into the lower stage of the water jet tower under negative pressure, the liquid level of each stage of the water jet tower is kept stable, and the absorption liquid between the water jet towers is prevented from affecting each other.

[0027] Further, the hydrogen peroxide bubble absorption tank and the water jet tower are provided with a gas-liquid monitoring port, the tail gas concentration and the tank absorption liquid acidity of each hydrogen peroxide bubble absorption tank and each water jet tower can be automatically monitored in real time, the system operation condition can be understood in time, and the absorption liquid can be replaced in time.

[0028] Further, the hydrogen peroxide bubble absorption tank and the water jet tower are provided with a cooling coil, so that the absorption liquid temperature of each hydrogen peroxide bubble absorption tank and each water jet tower is kept in a constant range.

[0029] Further, the hydrogen peroxide bubble absorption tank and the water jet tower are provided with a pressure gauge, a densimeter and a thermometer, so that the physical parameters and the operation condition of the tail gas treatment system can be understood in real time.

[0030] Further, the nitrogen oxide tail gas treatment system is provided with a cooling unit and a temperature control system, specifically, the cooling unit and the temperature control system are arranged on the condenser 4, the hydrogen peroxide bubble absorption tank and the water jet tower, the flow, the water temperature and other parameters of the cooling water can be automatically changed according to the temperature of the condenser 4, the hydrogen peroxide bubble absorption tank and the water jet tower, the environmental temperature of the system is stabilized, and the system stability is improved. The cooling system is also added to the hydrogen peroxide bubble absorption tank, the environmental temperature of the hydrogen peroxide is reduced, the invalid loss of the hydrogen peroxide caused by the reaction heat release and the self-decomposition heat release is avoided, meanwhile, the solubility of the nitrogen oxide in the hydrogen peroxide is increased, the tail gas removal efficiency can be obviously improved, and the system operation cost is reduced.

[0031] The nitrogen oxide tail gas treatment system provided by the utility model can reduce the concentration of nitrogen oxide in tail gas to ≤100 mg / m3 after the high-concentration nitrogen oxide (15.78 g / s, 105918 mg / m3, mainly in the form of nitrogen dioxide) generated by metal dissolution and calcination is treated by mist condensation, two-stage hydrogen peroxide oxidation, three-stage pure water absorption, one-stage hydrogen peroxide oxidation, four-stage pure water absorption and alkali liquor spraying, and realizes standard discharge. The biggest feature of the process system is that the nitrogen oxide tail gas absorption efficiency is effectively improved, and the resource utilization of waste gas and waste water is realized. The whole process system has reliability, practicality and economy, greatly reduces the production cost and treatment cost. In addition, the nitrogen oxide tail gas treatment system provided by the utility model also includes the design of recycling the absorption liquid, compared with the process system in which the absorption liquid is urea, not only the reagent input is reduced, but also the nitrogen oxide in the tail gas is recycled during the treatment process, so that the nitrogen oxide becomes recyclable nitric acid, realizes the resource utilization of waste gas and waste water, is more green and environmentally friendly, and has higher economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 The nitrogen oxide tail gas treatment system is shown in the structure diagram. DETAILED DESCRIPTION

[0033] The utility model discloses a kind of nitrogen oxide tail gas treatment systems. The person skilled in the art can learn from the content of this paper, and realizes appropriately improved process parameters. It is particularly necessary to point out that all similar substitutions and changes are obvious to the person skilled in the art, and they are all regarded as including in the utility model. The system of the utility model has been described by preferred embodiment, and relevant personnel can obviously change or appropriately change and combine the method and application of this paper without departing from the content, spirit and scope of the utility model, to realize and apply the utility model technology.

[0034] As Figure 1 Indicated, Figure 1This is a structural diagram of the nitrogen oxide tail gas treatment system of this utility model, wherein 101 is a cold water inlet, 102 is a cold water outlet, 2 is a calcining furnace, 3 is a dissolving kettle, 4 is a condenser, 5 is a first acid mixing tank, 11 is a second acid mixing tank, 12 is a centrifugal pump, 601 is a first-stage hydrogen peroxide bubbling absorption tank, 602 is a second-stage hydrogen peroxide bubbling absorption tank, 603 is a third-stage hydrogen peroxide bubbling absorption tank, 701 is a first-stage water jet tower, 702 is a second-stage water jet tower, 703 is a third-stage water jet tower, 704 is a fourth-stage water jet tower, 705 is a fifth-stage water jet tower, 706 is a sixth-stage water jet tower, 707 is a seventh-stage water jet tower, 8 is an alkaline spray tower, 9 is a centrifugal fan, and 10 is a chimney. The distances between the first-stage hydrogen peroxide bubbling absorption tank 601 and the second-stage hydrogen peroxide bubbling absorption tank 602, the distances between the hydrogen peroxide bubbling absorption tank 602 and the first-stage water jet tower 701, the distances between the first-stage water jet tower 701 and the second-stage water jet tower 702, the distances between the second-stage water jet tower 702 and the third-stage water jet tower 703, the distances between the third-stage water jet tower 703 and the third-stage hydrogen peroxide bubbling absorption tank 603 are all 1 m. The distance between the third-stage hydrogen peroxide bubbling absorption tank 603 and the fourth-stage water jet tower 704 is 1 m. The distances between the fourth-stage water jet tower 704 and the fifth-stage water jet tower 705 are all 3 m. The distance between the fifth-stage water jet tower 705 and the sixth-stage water jet tower 706 is 5 m. The distance between the sixth-stage water jet tower 706 and the seventh-stage water jet tower 707 is 8 m. The distance between the seventh-stage water jet tower 707 and the alkaline spray tower 8 is 60 m.

[0035] The present invention will be further described below with reference to the embodiments:

[0036] Example 1

[0037] The nitrogen oxide tail gas to be treated mainly consists of NO produced during the dissolution of manganese metal, with an amount of 5.97 g / s, and the reaction equation is: 3Mn + 8HNO3 = 3Mn(NO3)2 + 2NO + 4H2O; and NO2 produced during the calcination of manganese nitrate, with an amount of 9.81 g / s, and the reaction equation is: Mn(NO3)2 = MnO2 + 2NO2; NO x The total amount was 15.78 g / s, the air volume was 500 m³ / h, and the NO content was... x The content was 105918 mg / m³, NO x The content exhibits a peak value. The nitrogen oxide exhaust gas treatment system provided by this utility model treats the above-mentioned exhaust gas through the following steps:

[0038] (1) The nitrogen oxide tail gas of the manganese nitrate dissolving kettle 3 is first passed through a wire mesh demister and a condenser 4 which is a plate heat exchanger, and the nitrogen oxide tail gas of the calcining furnace 2 is first passed through a cyclone vane demister and a condenser 4 which is a plate heat exchanger, to recover the entrained liquid, metal dust and acid liquid and return them to the production kettle, and the tail gas is cooled to a temperature of 30°C;

[0039] (2) After step (1), the nitrogen oxide tail gas is reacted with hydrogen peroxide in a two-stage hydrogen peroxide bubble absorption tank, the hydrogen peroxide concentration in the bubble tank is 50 wt%, the liquid level height is 30%, and the ambient temperature is 30°C, to oxidize most of the nitrogen oxides in the tail gas into nitric acid, and the reaction equation is: 2NO + 3H2O2 = 2HNO3 + 2H2O, 2NO2 + H2O2 = 2HNO3;

[0040] (3) The tail gas after step (2) is passed into a three-stage water jet tower for pure water absorption, the liquid level height of the water jet tower medicine box is 80%, and the ambient temperature is 30°C, to generate nitric acid and nitric oxide by the reaction of nitrogen dioxide and pure water, and the reaction equation is: 4NO + 3O2 + 2H2O = 4HNO3, 3NO2 + H2O = 2HNO3 + NO, NO2 + 2H2O + O2 = 4HNO3;

[0041] (4) The tail gas after step (3) is passed into a one-stage hydrogen peroxide bubble absorption tank, the hydrogen peroxide concentration in the bubble tank is 50 wt%, the liquid level height is 30%, and the ambient temperature is 30°C, to again perform an oxidation reaction with hydrogen peroxide;

[0042] (5) The tail gas after step (4) is passed into a four-stage water jet tower group, the liquid level height of the water jet tower medicine box is 80%, and the ambient temperature is 30°C, to again perform pure water absorption;

[0043] (6) The tail gas after step (5) is passed into an alkali liquid spray tower 8, the alkali liquid concentration of the alkali liquid spray tower 8 is 20 wt% sodium hydroxide, and the residual nitric oxide and nitrogen dioxide in the residual tail gas are reacted with oxygen in the air and the sodium hydroxide absorption liquid to generate sodium nitrate and sodium nitrite, and the reaction equation is: 2NO2 + 2NaOH = NaNO3 + NaNO2 + H2O, 4NO + 3O2 + 4NaOH = 4NaNO3 + 2H2O;

[0044] (7) The tail gas after step (6) is discharged through a chimney 10 by a centrifugal fan 9.

[0045] After the nitrogen oxide tail gas is treated in this embodiment, the content of NO x is ≤100 mg / m³, achieving standard discharge, and the specific data are shown in Table 1:

[0046] Table 1

[0047]

[0048] After the four batches of nitrogen oxide tail gas treatment, the hydrogen peroxide concentration of the first-stage hydrogen peroxide bubble absorption tank 601 is reduced from 50% to 1%, and the nitric acid concentration is 42 wt%; the hydrogen peroxide concentration of the second-stage hydrogen peroxide bubble absorption tank 602 is reduced from 50% to 35%, and the nitric acid concentration is 24 wt%. The absorption liquid of the first-stage hydrogen peroxide bubble absorption tank 601 is discharged from the bottom valve and pumped into the first acid mixing tank 5, and after acid mixing, it is returned to the dissolving kettle 3 in the form of production material; the absorption liquid of the second-stage hydrogen peroxide bubble absorption tank 602 is pumped into the first-stage hydrogen peroxide bubble absorption tank 601, and the absorption liquid of the third-stage hydrogen peroxide bubble absorption tank 603 is pumped into the second-stage hydrogen peroxide bubble absorption tank 602, and new absorption liquid is supplemented in the third-stage hydrogen peroxide bubble absorption tank 603, which can accelerate the increase of the nitric acid concentration of the hydrogen peroxide bubble absorption tank, and the efficiency is improved by about 15-20%.

[0049] After the 10 batches of nitrogen oxide tail gas treatment, the nitric acid concentration of the first-stage water jet tower 701 is 40 wt%, the nitric acid concentration of the second-stage water jet tower 702 is 33 wt%, and the nitric acid concentration of the third-stage water jet tower 703 is 21 wt%; the absorption liquid of the first-stage water jet tower 701 is discharged from the bottom valve and pumped into the second acid mixing tank 11, and after acid mixing, it is returned to the dissolving kettle 3 in the form of production material; the absorption liquid of the second-stage water jet tower 702 is pumped into the first-stage water jet tower 701, and the absorption liquid of the third-stage water jet tower 703 is pumped into the second-stage water jet tower 702, and so on, and the absorption liquid of all the lower-stage water jet towers is pumped into the upper-stage water jet tower, and new pure water is pumped into the seventh-stage water jet tower 707 as absorption liquid. This operation can accelerate the nitric acid concentration of all the water jet towers, and the efficiency is improved by about 20-30%. The treated exhaust gas meets the national emission standard and is discharged to the chimney 10 by the centrifugal fan 9.

[0050] The above merely describes the preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent substitutions or changes to the technical scheme and concept of the present application within the technical range disclosed by the present application, and all of them should be covered within the protection scope of the present application.

Claims

1. A nitrogen oxide tail gas treatment system, characterized by, Comprise: a condenser (4); a first stage hydrogen peroxide bubble absorption tank (601) connected with the air outlet of the condenser (4); a second stage hydrogen peroxide bubble absorption tank (602) connected with the air outlet of the first stage hydrogen peroxide bubble absorption tank (601); a first stage water jet tower (701) connected with the air outlet of the second stage hydrogen peroxide bubble absorption tank (602); a second stage water jet tower (702) connected with the air outlet of the first stage water jet tower (701); a third stage water jet tower (703) connected with the air outlet of the second stage water jet tower (702); a third stage hydrogen peroxide bubble absorption tank (603) connected with the air outlet of the third stage water jet tower (703); a fourth stage water jet tower (704) connected with the air outlet of the third stage hydrogen peroxide bubble absorption tank (603); a fifth stage water jet tower (705) connected with the air outlet of the fourth stage water jet tower (704); a sixth stage water jet tower (706) connected with the air outlet of the fifth stage water jet tower (705); a seventh stage water jet tower (707) connected with the air outlet of the sixth stage water jet tower (706); a lye spray tower (8) connected with the air outlet of the seventh stage water jet tower (707).

2. The nitrogen oxide exhaust gas treatment system of claim 1, wherein, An absorption liquid flow pipe is arranged between the first stage hydrogen peroxide bubble absorption tank (601), the second stage hydrogen peroxide bubble absorption tank (602) and the third stage hydrogen peroxide bubble absorption tank (603); A centrifugal pump (12) is arranged on the absorption liquid flow pipe.

3. The nitrogen oxide exhaust gas treatment system of claim 2, wherein, An absorption liquid flow pipe is arranged between the first stage hydrogen peroxide bubble absorption tank (601) and the second stage hydrogen peroxide bubble absorption tank (602); An absorption liquid flow pipe is arranged between the second stage hydrogen peroxide bubble absorption tank (602) and the third stage hydrogen peroxide bubble absorption tank (603).

4. The nitrogen oxide exhaust gas treatment system of claim 1, wherein, An absorption liquid flow pipe is arranged between the first stage water jet tower (701), the second stage water jet tower (702), the third stage water jet tower (703), the fourth stage water jet tower (704), the fifth stage water jet tower (705), the sixth stage water jet tower (706) and the seventh stage water jet tower (707); A centrifugal pump (12) is arranged on the absorption liquid flow pipe.

5. The nitrogen oxide exhaust gas treatment system of claim 4, wherein, An absorption liquid flow pipe is arranged between the first stage water jet tower (701) and the second stage water jet tower (702); An absorption liquid flow pipe is arranged between the second stage water jet tower (702) and the third stage water jet tower (703); An absorption liquid flow pipe is arranged between the third stage water jet tower (703) and the fourth stage water jet tower (704); An absorption liquid flow pipe is arranged between the fourth stage water jet tower (704) and the fifth stage water jet tower (705); An absorption liquid flow pipe is arranged between the fifth stage water jet tower (705) and the sixth stage water jet tower (706); An absorbing liquid flow pipe is arranged between the sixth water jet tower (706) and the seventh water jet tower (707).

6. The nitrogen oxide exhaust gas treatment system of claim 1, wherein, The distance between the first hydrogen peroxide bubble absorption tank (601) and the second hydrogen peroxide bubble absorption tank (602), the distance between the second hydrogen peroxide bubble absorption tank (602) and the first water jet tower (701), the distance between the first water jet tower (701) and the second water jet tower (702), the distance between the second water jet tower (702) and the third water jet tower (703), the distance between the third water jet tower (703) and the third hydrogen peroxide bubble absorption tank (603), and the distance between the third hydrogen peroxide bubble absorption tank (603) and the fourth water jet tower (704) are independently 1.0-1.2 m. The distance between the fourth water jet tower (704) and the fifth water jet tower (705) is 1.0-3.0 m. The distance between the fifth water jet tower (705) and the sixth water jet tower (706) is 3.0-6.0 m. The distance between the sixth water jet tower (706) and the seventh water jet tower (707) is 7.0-9.0 m. The distance between the seventh water jet tower (707) and the lye spraying tower (8) is 50-70 m.

7. The nitrogen oxide exhaust gas treatment system of claim 1, wherein, A demister is further connected before the condenser (4). The condenser (4) is connected with the gas outlet of the demister.

8. The nitrogen oxide exhaust gas treatment system of claim 1, wherein, Each hydrogen peroxide bubble absorption tank is provided with an aeration system, which is a microporous aeration disc.

9. The nitrogen oxide exhaust gas treatment system of claim 1, wherein, Each water jet tower is provided with a balance air pipe. Each hydrogen peroxide bubble absorption tank and each water jet tower is provided with a cooling coil.

10. The nitrogen oxide exhaust gas treatment system of any one of claims 1-9, wherein, It further comprises a cooling unit and a temperature control system, which are arranged on the condenser (4), each hydrogen peroxide bubble absorption tank and each water jet tower.

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