FLUE GAS MULTIPLE POLLUTANTS COMMON TREATMENT PROCESS METHOD AND APPARATUS

Abstract

A flue gas multipollutant co-treatment process method and apparatus includes: injection of ammonia gas into the original flue gas; mixing of ammonia gas with the original flue gas; passing the mixed gas consisting of ammonia gas and original flue gas through a desulfurization and adsorption process apparatus (1) to perform the deep desulfurization of the original flue gas; passing the flue gas through an SCR denitration process apparatus (2) to perform the denitration of the flue gas after desulfurization; and passing the flue gas through a CO catalytic oxidation process apparatus (3) to perform the CO removal of the flue gas after denitration.Before flue gas denitrification, it undergoes a deep desulfurization process to prevent sulfur dioxide from poisoning an SCR catalyst, improve desulfurization and denitrification efficiency, reduce production costs for a manufacturing plant, and improve product quality.

Description

FLUE GAS MULTIPLE POLLUTANTS COMMON TREATMENT PROCESS METHOD AND ITS APPARATUS The present application, which is included here purely by reference, is the Chinese National The intellectual property rights application, filed with the Intellectual Property Administration on November 5, 2019, concerns "CHIMNEY GAS". "MULTIPLE POLLUTANTS COMMON TREATMENT PROCESS METHOD AND APPARATUS" Claim of priority based on Chinese Patent Application No. 201911073483.7, titled [Title of Patent Application]. is doing. TECHNICAL FIELD The present invention relates to a method for the treatment of flue gas and, in particular, This relates to the technical field of sintering devices, where flue gas contains multiple pollutants. It relates to a process for purifying flue gas in some way. The present invention also deals with multiple It relates to a device for treating pollutants in conjunction with other processes. PREVIOUS TECHNIQUE Industrial flue gas, especially from sintering machines in the iron and steel industry. For flue gas, flue gas denitrification technology, multiple nitrous oxide or sulfur Nitrogen oxide production is a flue gas treatment technique applied in the chemical industry. Oxides and sulfur oxides are among the main air pollutants. Simultaneous flue gas emissions... Desulfurization and denitrification technology is currently mostly research and development. It is in the industrial demonstration phase. In particular, the continuous development of NOx control standards. both desulfurization and denitrification in a range of systems through tightening Since it can be implemented, simultaneous desulfurization and denitrification technology It is influenced by various countries. Sintering technology is widely used in the mineral smelting production process. 138761.03 It is implemented. In the current technology, flue gas produced by sintering is sintered. The flue gas emissions roughly meet the standard, but studies have shown that... Low concentration of sulfur dioxide and high concentration of sulfur dioxide during the sintering process. a flue gas containing high concentrations of nitrogen oxides and carbon monoxide It has been found that in the desulfurization process, the flue to be subjected to denitrification Desulfurization is necessary to ensure that the gas contains a certain amount of sulfur dioxide. It is not completed. Sulfur dioxide in the flue gas is removed during the denitrification process. deactivating the SCR catalyst, leading to the consumption of a large amount of SCR catalyst. It can release sulfur dioxide, significantly reducing denitrification efficiency. by affecting and increasing the production cost of the business, SCR catalyst clogging and It causes poisoning. Therefore, deep desulfurization of sulfur oxides from sintering flue gas is necessary. capable of performing, thus enabling the use of SCR catalyst during denitrification. reducing flue gas containing multiple pollutants, thus lowering production costs for businesses. how to provide a process for joint purification by experts in the field This is an urgent technical problem that needs to be solved. A BRIEF DESCRIPTION OF THE INVENTION Given the shortcomings of the existing technology described above, the present invention... One purpose is desulfurization, which prevents sulfur dioxide from poisoning the SCR catalyst. and improves the efficiency of denitrification, reduces production costs for businesses, and Desulfurization before flue gas denitrification improves product quality. The goal is to thoroughly desulfurize flue gas through the adsorption process. The present invention describes a method for the simultaneous treatment of flue gas with multiple pollutants. The process involves the following steps: 1) ammonia gas spraying into the raw flue gas and mixing ammonia gas with the raw flue gas; 2) to carry out the deep desulfurization process of raw flue gas and ammonia gas and raw materials are used to obtain thoroughly desulfurized flue gas. 238761.03 The mixed gas resulting from flue gas undergoes desulfurization and adsorption processes. 3) the flue gas that has been thoroughly desulfurized in step 2), the flue gas To perform the denitrification process, it undergoes SCR denitrification. 4) holding; and 4) the step to carry out the process of removing CO from the flue gas. 3) The flue gas, which is denitrified in step 3, passes through a CO catalytic oxidation treatment device. The passage of ammonia gas is very high compared to the sulfur dioxide content in the flue gas. a large amount of ammonia gas is sprayed, along with a small amount of sulfur. It is able to remove dioxide and has a deep desulfurization and removal effect. It can provide this. Also, the chimney before entering the SCR process system... to ensure that the sulfur dioxide content in the gas is very low, and thus the chimney to ensure denitration efficiency of the gas, sulfur dioxide and ammonia in the flue gas removing the product (ammonium sulfate or ammonium bisulfate) from the gas reaction An adsorption layer is used for this purpose. According to a first application of the present invention, flue gas mixed with multiple pollutants A process is provided to purify it in some way. It is a process for treating flue gas with multiple pollutants simultaneously, This includes the following steps: 1) Spraying ammonia gas into the raw flue gas and the ammonia gas being drawn into the raw flue gas mixing with gas; 2) to carry out the deep desulfurization process of raw flue gas and ammonia gas and raw materials are used to obtain thoroughly desulfurized flue gas. The mixed gas resulting from flue gas undergoes desulfurization and adsorption processes. eclipse; 3) To perform the denitrification process of the flue gas, go to step 2). SCR denitrification process of thoroughly desulfurized flue gas being held; and 4) To perform the CO removal process from the flue gas, denitrify as in step 3). 338761.03 The resulting flue gas is passed through a CO2 catalytic oxidation process device. Ideally, the process should also include the following: 5) Deep denitrification of flue gas to obtain clean flue gas To achieve this, after the CO removal process in step 4, the chimney... The gas is subjected to a second SCR denitrification process. Preferably, raw flue gas less than 100 mg / m3, preferably less than 80 mg / m3, and even more preferably... It contains less than 50 mg / m3 of sulfur oxides; and the depth in step 2). After the desulfurization process, the flue gas, which is thoroughly desulfurized, less than mg / m3, preferably less than 8 mg / m3, even more preferably less than 5 mg / m3 It contains sulfur oxides. Ideally, the raw flue gas is obtained by desulfurizing a sintering flue gas. It is a flue gas that is processed and the raw flue gas is heated to a temperature lower than 320°C, preferably. A temperature lower than 300°C, and preferably lower than 280°C. It has a temperature. Preferably, in step 1), ammonia gas, sulfur oxides and nitrogen oxides are removed from the raw flue. 1-2 times the total amount of ammonia gas needed to remove it from the gas in quantity, preferably 1.05-1.5 times and even more preferably 1.1-1.2 times It is being sprayed. Ideally, the ammonia gas spraying in step l) should be specifically as follows: This is accomplished by: mixing ammonia gas with a hot environment and the mixed gas is sprayed into the raw flue gas, followed by ammonia gas and hot Mixing the resulting mixed gas from the environment with raw flue gas. Ideally, the warm medium is hot air or clean flue gas obtained in step 5). Ideally, a raw flue gas transmission pipeline and a clean flue gas transmission pipeline. It has a heat exchanger; raw flue gas is heat exchanged and its temperature increased. It passes through the heat exchanger and is then processed in step l) and the clean flue gas 438761.03 It passes through a heat exchanger to reduce its temperature and then is discharged. It is either processed or mixed with ammonia gas. Ideally, the heat exchanger is a GGH heat exchanger. Ideally, the process should also include the following: 6) Sulfur in raw flue gas, represented as sulfur oxides in %. Measurement of oxide concentrations; represented as % in the form of CaZot oxides. Measurement of the concentration of nitrogen oxides in the raw flue gas; in percentage. Ammonia in the discharged clean flue gas is represented as escaping ammonia. Measurement of the gas concentration; raw flue gas, represented as Qflue gas. Measurement of the gas flow rate; where in step l), ammonia gas in an amount of Qnh3 is being sprayed, ammonia that escaped); X (Sulfur oxides + ^Nitrous oxides - QnH3 — Qflue gas Here, 'a' is the amount of ammonia gas consumed by sulfur dioxide in the flue gas, which is 0.4-1.5. preferably a reaction coefficient of 0.5-1.2 and even more preferably 0.6-1; and b, 0.5-2% of ammonia gas consumed by nitrogen oxides in flue gas, preferably It is a reaction coefficient of 0.6-1.5 and preferably 0.7-1.2. According to a second application of the present invention, flue gas mixed with multiple pollutants A device is provided to purify it in some way. The apparatus for treating flue gas with multiple pollutants simultaneously is a desulfurizer. denitrifying and adsorbing process device, an SCR denitrifying process device, a CO It includes a catalytic oxidation process device and an ammonia gas injection device. and here is a raw flue gas transmission pipeline desulfurizing and adsorbing The processing device is connected to a gas inlet; desulfurizing and adsorbing. The processing device has a gas outlet and the SCR denitrifier processing device has a gas inlet. 538761.03 via a deeply desulfurized flue gas transmission pipeline It is connected; a gas outlet of the SCR denitrifying process device is CO catalytic. Denitrified flue gas is transmitted from a gas inlet to a gas inlet of the oxidation process device. It is connected via pipeline; an ammonia gas injection device is used in the raw flue. the gas is located inside the transmission pipeline; and ammonia gas ammonia gas Ammonia gas is supplied to the spraying device via a transmission pipeline. Ideally, the apparatus should also include a second SCR denitrifying process device, Here, a CO2 catalytic oxidation process device has an exhaust port, and the second SCR is located here. The denitrifying process device inlet contains CO2-removed flue gas. It is connected via a transmission pipeline and the second SCR denitrifying process One of the appliance's exhaust vents is connected to a clean flue gas delivery pipeline. Ideally, the apparatus also includes an ammonia gas mixer, where a ammonia gas transmission pipeline and a hot environment transmission pipeline for ammonia gas The mixer is connected to a gas inlet; and ammonia gas is connected to a gas inlet of the mixer. an outlet for conveying a mixed gas consisting of ammonia gas and a hot environment The ammonia gas is connected to the injection device via a pipeline. Ideally, the apparatus includes a heat exchanger, where the heat exchanger successively transfers raw materials. It is connected to the flue gas transmission pipeline and the clean flue gas transmission pipeline. and the connection point of the heat exchanger with the raw flue gas transmission pipeline ammonia The gas is upstream of the injection device. Preferably, the clean flue gas transmission pipeline is upstream of the hot medium transmission pipeline. It is connected in the flow. Preferably, a desulfurizer inside the desulfurizing and adsorbing process device. There is an adsorbing and an adsorbing layer or a molecular sieve, desulfurized adsorbent and absorbing layer or molecular sieve, calcium oxide and / or active It is carbon. Ideally, the heat exchanger is a GGH heat exchanger. 638761.03 Ideally, the raw flue gas transmission pipeline should be equipped with a flue gas flow rate monitoring sensor, sulfur oxide concentration monitoring sensor, and a nitrogen oxide concentration monitor. It has a sensor; the ammonia gas transmission pipeline monitors the ammonia gas flow rate. It has a sensor; and a clean flue gas transmission pipeline of ammonia gas. It has a concentration measuring device; here, a flue gas flow rate monitoring sensor. The flow rate of raw flue gas, as measured, is represented as QflueGas; Sulfur oxide concentration in raw flue gas measured by a monitoring sensor. Sulfur oxide concentration is represented as % in the form of Csulfur oxides; Nitrogen in raw flue gas as measured by a nitrogen oxide concentration monitoring sensor. Oxide concentration is represented as % in the form of Cazote oxides; and The discharged clean ammonia gas concentration is measured by an ammonia gas concentration measuring device. The concentration of ammonia gas in flue gas is expressed as % in the form of Cease of ammonia. is represented; The calculation is as follows: QnH3 = Qflue gas X (Csulfur oxides + / Cnitrogen oxides “ Cescaped ammonia) 5 Here, 'a' is the amount of ammonia gas consumed by sulfur dioxide in the flue gas, which is 0.4-1.5. preferably a reaction coefficient of 0.5-1.2 and even more preferably 0.6-1; and b, 0.5-2% of ammonia gas consumed by nitrogen oxides in flue gas, preferably It is a reaction coefficient of 0.6-1.5 and more preferably 0.7-1.2; and here The ammonia gas flow rate monitoring sensor is checked at a Qnh3 reading. In the inventor's investigation of the present application, sulfur oxides in flue gas (for example) the removal of nitrogen oxides (such as sulfur dioxide) from flue gas They have found that it has a significant impact. In current technology, some processes produce Flue gas contains sulfur oxides in relatively low amounts, while flue gas contains them in relatively high amounts. It contains a significant amount of nitrogen oxides. The sulfur oxide content in such flue gases is, meeting emission standards and complying with flue gas emission standards It only needs to undergo the denitrification process. However, the inventor, 738761.03 In engineering applications, this type of flue gas has a low denitrification efficiency. He found that it possesses... In his research, the inventor discovered that flue gas... Denitrification efficiency depends primarily on the presence of sulfur oxides in the flue gas. that it was affected and that sulfur oxides removed nitrogen oxides from the flue gas. They found that it had a negative impact. Ammonia gas and sulfur dioxide react via the following reaction equation: It reacts: 2NH3 + SO2 + 2H2O = (NH4)2SO3. According to the technical solution of the present invention, low sulfur oxide is used for flue gas. a mixture of multiple pollutants that have a high nitrogen oxide content A process is carried out to purify it. Excessive amounts of raw flue gas are added to it. Ammonia gas is being injected (compared to the sulfur oxide content in the flue gas) and then to greatly reduce the sulfur oxide content in the flue gas It undergoes a deep desulfurization process in the form of adsorption, and then It is subjected to denitrification. Technical solution of the current application. According to this, since the sulfur oxide content in the raw flue gas itself is low, the chimney low concentrations of sulfur oxides in the gas, high concentrations of ammonia large amount of ammonia gas to be removed by the gas It is sprayed, and then the flue gas adheres to the sulfur oxide adsorption layer. to adsorb in the form of ammonium bisulfate or ammonium sulfate It is treated with a desulfurization and adsorption layer, thus deepening the flue gas. desulfurization and sulfur in the thoroughly desulfurized flue gas By further reducing the oxide content, the denitrification efficiency of the flue gas is increased. is provided. It should be noted that the required amount of ammonia gas (^^3) is as follows: QnH3 — Qflue gas X (ofCsulfur oxides + / 'Cazot oxides " Cessing ammonia), 838761.03 Excess ammonia is detected by measuring the values ​​of Qbaca gas, Csulfur oxides, Cnitrogen oxides, and Cease escaping ammonia. The required amount of ammonia gas (^1^3) is calculated using the equation above. It can be calculated. Additionally, the technical solution of the current application involves a high amount of raw flue gas. If it contains sulfur oxide, spraying large amounts of ammonia gas is only This will not only cause a large amount of ammonia gas to escape, but also over time will affect its own desulfurization efficiency and also the subsequent This will also affect denitrification efficiency. Therefore, the technical aspects of the current application... The solution should have a particularly low sulfur oxide content (e.g., less than 100 mg / m3, (preferably less than 80 mg / m3 and even more preferably less than 50 mg / m3) and high nitric oxide for flue gas with a content (typically between 100 mg / m3 and 1000 mg / m3) It is suitable. According to the technical solution of the current application, the chimney has a low sulfur oxide content. For the gas, a large amount of ammonia gas is first injected into the raw flue gas, and then subjected to deep desulfurization process via adsorption layer is retained and then the temperature is greatly reduced for the denitrification process. and subjected to denitrification treatment which increases the efficiency of the denitrification process is being held. By adopting the technical solution that is the subject of the current application, The denitrification process is carried out at a temperature of 150-220°C and The nitrogen oxide content in denitrified flue gas is less than 30 mg / m3. In addition, studies have shown that even small amounts of sulfur oxides can catalyze CO2. high sulfur content in flue gas can quickly deactivate the oxidizer. The oxide content negatively affects the removal of CO from the flue gas. It has been found that it will have an effect. According to the technical solution of the current invention, in the flue gas By thoroughly processing sulfur oxides, the sulfur oxides in the flue gas are reduced. content less than 10 mg / m3 (preferably less than 8 mg / m3 and more preferably 5 It can be controlled to be less than mg / m3, which means that in the flue gas 938761.03 It eliminates the effect of sulfur oxides on the CO catalytic oxidizer. The present invention removes sulfur throughout the entire denitrification and decarbonization process. eliminating the effect of oxides and thus preventing denitrification from flue gas. by ensuring the efficiency of decarbonization, reducing the pollutant content in exhaust gas. reducing and lowering flue gas processing costs by first deep-sea processing the flue gas. It adopts the technical solution of subjecting the flue gas to desulfurization. The presence of sulfur dioxide significantly reduces the denitrification efficiency of the flue gas. Research has shown that it is affected in this way: the sulfur dioxide content in flue gas. The higher the value, the lower the SCR denitrification rate becomes, and the SCR The risk of catalyst poisoning is so high. Conversely, in the flue gas... The lower the sulfur dioxide content, the higher the SCR denitrification rate. The SCR catalyst is so stable. Flue gas contains high amounts of sulfur dioxide. If it contains sulfur dioxide, the flue gas is converted into ammonia during the denitrification process. will react with the gas and produce large amounts of ammonium sulfate or ammonium This will produce bisulfates, which will block the reaction channels in the SCR catalyst. It is very prone to sulfur buildup. Therefore, before SCR denitrification, the sulfur in the flue gas must be removed. The dioxide content should be reduced as much as possible, which will then lead to denitrification. This will greatly benefit the process. Furthermore, research has shown that CO2 catalytic oxidizer is a more sensitive catalyst and small amounts of sulfur dioxide cause the CO catalyst to deactivate quickly. Experiments have shown that this can be the reason. In experiments, the sulfur dioxide content in the flue gas was 10 When it exceeds mg / m3, the CO catalytic oxidizer will be significantly affected. It has been found. In the present invention, the processing of flue gas by the adsorption layer via this, the sulfur dioxide content in the flue gas before entering the SCR reactor is 10 It is controlled to be below mg / m3, thus reducing the CO2 catalytic oxidizer concentration. Safety and also the decarbonization effect of flue gas are guaranteed. The flue gas processed by the technical solution of the present invention has a relatively low sulfur content. Because of its oxide content, the sulfur oxides in the flue gas are deep. 1038761.03 a very large amount of ammonia gas to carry out the desulfurization process (compared to the sulfur oxide content in the flue gas) according to process requirements It can be sprayed. Preferably, the sprayed ammonia gas is mixed with the raw flue gas. to improve the reaction efficiency with sulfur oxides in the gas and to remove sulfur from the flue gas To achieve the oxide removal effect, first with a hot environment It can be mixed and then further combined with raw flue gas. Ideally, after the entire process, the clean flue gas is adopted as the hot medium, and heat in clean flue gas to achieve comprehensive use of resources It is used. In the present invention, in order to fully utilize the heat in denitrified flue gas... a raw flue gas transmission pipeline and a clean flue gas transmission pipeline a heat It is equipped with a heat exchanger. The denitrification reaction is an exothermic reaction. Therefore, denitrified flue gas has a high temperature and this heat... This part is used to increase the temperature of the flue gas before denitrification, thus also deep desulfurization and denitrification of flue gas Efficiency is achieved. In the present invention, flue gas from which CO has been removed is further processed to remove nitrogen oxides from the flue gas. It is subjected to another SCR denitrification process to remove it, so that Flue gas is thoroughly denitrified to obtain clean flue gas. The present invention aims to accurately determine the concentration of sulfur oxides in raw flue gas. by measuring the nitrogen oxide concentration in the raw flue gas, by measuring the ammonia gas concentration in the discharged clean flue gas and by measuring the flow rate of raw flue gas, deep desulfurization and To ensure the effectiveness of the denitrification process and to reduce the escape of ammonia gas, sprayed into raw flue gas to prevent accident risks and reduce environmental pollution The amount of ammonia gas can be precisely controlled. In a second application of the current proposal, a desulfurizer and an adsorbent 1138761.03 the processing equipment includes an SCR denitrification process device and a CO catalytic oxidation device. The processing devices are connected in sequence; ammonia gas spraying device, ammonia gas and raw flue gas mixture to obtain a gas from the raw flue gas transmission pipeline It sprays ammonia gas; and then from the ammonia gas and raw flue gas The resulting mixed gas is processed from raw flue gas to perform a deep desulfurization process. gas from the transmission pipeline to the desulfurizing and adsorbing process device It is delivered to the inlet. Deeply desulfurized flue gas, denitrification To perform this process, it enters the SCR denitrification processing machine and Deeply denitrified flue gas to perform CO removal process The current application involves a CO2 catalytic oxidation process device. to treat flue gas supplied by a company with multiple pollutants in a common manner Through the apparatus, sulfur oxides, nitrogen oxides and carbon oxides are sintered in the flue. can be removed from the gas in stages and low concentrations of sulfur oxides to process, ensure complete removal of sulfur oxides and SCR excessive amount of ammonia gas to prevent catalyst poisoning This apparatus is used for desulfurization, denitrification and decarbonization. It effectively increases efficiency and reduces the company's production costs. In the second application of the present invention, a CO catalytic oxidation process device. The flue gas processed by this unit is sent to the second SCR denitrification treatment device. The second SCR denitrification process device removes residual nitrogen from the flue gas. in processing oxides and finally, increasing denitrification efficiency in the present invention. The clean flue gas is discharged via a transmission pipeline. In the second application of the present invention, by an ammonia gas spraying device The sprayed gas containing ammonia comes from an ammonia gas mixer. The ammonia gas mixer mixes ammonia gas and a hot ambient gas. It mixes high-purity ammonia gas into a hot environment to produce it (hot The environment is preferably warm air), and the ammonia gas mixer mixes ammonia gas and warm air. ammonia gas to be conveyed via pipeline to transport the mixed gas from the environment 1238761.03 It is connected to the spraying device. Ammonia gas in a mixed gas consisting of ammonia gas and a hot environment a concentration that can effectively prevent an ammonia gas explosion It should be stated that it is safe in this way. By mixing, ammonia gas and heat The temperature of the mixed gas in the environment suddenly increases when ammonia gas reaches a high temperature. which can prevent it from entering the environment and exploding, or the sintering flue gas is cooler sintered chimney that can prevent condensation when it comes into contact with ammonia gas. It becomes almost identical to that of the gas. Sintering of flue gas Its condensation will produce a highly acidic sulfur liquid that will corrode the flue gas pipeline. In the second application of the present invention, the heat exchanger is an SCR denitrification process device. clean flue gas inside the transmission pipeline to reuse the heat produced within it. It transfers the heat of the gas to the raw flue gas transmission pipeline. In the second application of the present invention, clean flue gas from the transmission pipeline the gas is then transferred to a hot medium transmission pipeline to be mixed with ammonia gas. This process reduces the energy consumed in gas production. In the second application of the present invention, a desulfurizing and adsorbing process is performed. inside the device, it is capable of effectively removing elemental sulfur from flue gas. Calcium oxide or activated carbon is provided. In the second application of the present invention, the flow rate of raw flue gas and sulfur oxides By measuring the content of nitrogen oxides, the amount of ammonia gas sprayed can be accurately determined. It can be controlled in this way. In the present invention, dust particles in flue gas are adsorbed by providing an adsorption layer. It can also be removed. In other words, the adsorption layer can also remove dust. It also functions as a dust removal device. The adsorption layer removes dust from the flue gas. further reducing its content, so that the powder is suitable for SCR catalyst and CO catalytic oxidizer. To avoid its effect on the powder, the SCR catalyst and CO catalytic oxidizer to prevent clogging and also to ensure the denitrification of flue gas and 1338761.03 This is provided to guarantee the effectiveness of decarbonization. In the present invention, the height of the desulfurizing and adsorbing process device is 1-50 m, preferably 2-30 m and even more preferably 3-20 m. In the present invention, the height of the SCR denitrifying process device is 1-50 m, preferably. It is 2-30 m and preferably 3-20 m. In the present invention, the height of the CO catalytic oxidation process device is 1-50 m, preferably. It is 2-30 m and preferably 3-20 m. In the present invention, the ammonia gas spraying device is an ammonia gas atomizer. Compared to the previous technique, the present invention has the following beneficial effects. 1. The technical solutions provided by this application involve the desulfurization of sintering flue gas. It can increase the ratio, prevent the SCR catalyst from deactivating, and It can significantly reduce production costs for businesses. 2. The technical solutions provided by this application are for deep denitrification. It is able to achieve this, and improve the rate of denitrification and decarbonization. and can reduce operating costs. BRIEF DESCRIPTION OF THE FIGURES Figure 1 shows an example of the present invention: deep desulfurization by ammonia gas spray. It is a schematic flowchart of the process; Figure 2 shows an example of the present invention where flue gas contains numerous pollutants in common. It is a schematic flowchart showing the general flow of the process for purification in this way; Figure 3 shows an example of the present invention where flue gas contains a mixture of numerous pollutants. It is a schematic structural diagram showing the connection of the apparatus for purification in this way; Figure 4 shows a second SCR denitrifying process device in an example of the present invention. 1438761.03 It is a schematic structural diagram of the apparatus it possesses; Figure 5 shows a schematic of an apparatus containing a heat exchanger in an example of the present invention. It is a structural diagram; Figure 6 shows a second SCR denitrifying process in an example of the present invention. This is a schematic diagram of the apparatus, which has a heating element and a heat exchanger. The reference numbers in the attached figures are given below: 1 desulfurizing and adsorbing process device, 2 SCR denitrification process devices, 3 CO catalytic oxidation process devices, 4 ammonia gas spraying devices, 5 second The SCR denitrification process unit consists of 6 ammonia gas mixers and 7 heat exchangers; LI raw flue gas transmission pipeline, L4 ammonia gas transmission pipeline, L5 CO flue gas transmission pipeline; L6 clean flue gas transmission pipeline, L7 hot medium transmission pipeline line and L8 hot medium gas mixture transmission pipeline; Q1 is a flue gas flow rate monitoring sensor, and C1 is a sulfur oxide concentration monitoring sensor. sensor, C2 nitrogen oxide concentration monitoring sensor, Q3 ammonia gas flow rate sensor Monitoring sensor and C3 ammonia gas concentration measuring device. DETAILED DESCRIPTION OF THE INVENTION According to a first application of the present invention, flue gas mixed with multiple pollutants A process is provided to purify it in some way. It is a process for treating flue gas with multiple pollutants simultaneously, This includes the following steps: 1) Spraying ammonia gas into the raw flue gas and the ammonia gas being drawn into the raw flue gas mixing with gas; 2) to carry out the deep desulfurization process of raw flue gas and ammonia gas and raw materials are used to obtain thoroughly desulfurized flue gas. The mixed gas from the flue gas is subjected to desulfurization and adsorption processes. abandonment; 1538761.03 3) To perform the denitrification process of the flue gas, go to step 2). The deeply desulfurized flue gas is subjected to SCR denitrification process. being held; and 4) To perform the CO removal process from the flue gas, denitrify as in step 3). The resulting flue gas is passed through a CO2 catalytic oxidation process device. Ideally, the process should also include the following: 5) Deep denitrification of flue gas to obtain clean flue gas To achieve this, after the CO removal process in step 4, the chimney... The gas is subjected to a second SCR denitrification process. Preferably raw flue gas with less than 100 mg / m3, preferably less than 80 mg / m3, and even more preferably... It contains sulfur oxides in amounts less than 50 mg / m3. Deep in Step 2). After the desulfurization process, the thoroughly desulfurized flue gas has a purity level of less than 10 mg / m3. small amounts of sulfur oxides, preferably less than 8 mg / m3, even more preferably less than 5 mg / m3. It includes. Ideally, the raw flue gas is obtained by desulfurizing a sintering flue gas. It is a flue gas that is processed and the raw flue gas is heated to a temperature lower than 320°C, preferably. A temperature lower than 300°C, and preferably lower than 280°C. It has a temperature. Preferably, in step 1), ammonia gas, sulfur oxides and nitrogen oxides are removed from the raw flue. 1-2 times the total amount of ammonia gas needed to remove it from the gas in quantity, preferably 1.05-1.5 times and even more preferably 1.1-1.2 times It is being sprayed. Ideally, the ammonia gas spraying in step l) should be specifically as follows: This is accomplished by: mixing ammonia gas with a hot environment and the mixed gas is sprayed into the raw flue gas, followed by ammonia gas and hot Mixing the resulting mixed gas from the environment with raw flue gas. 1638761.03 Ideally, the warm medium is hot air or clean flue gas obtained in step 5). Ideally, a raw flue gas transmission pipeline and a clean flue gas transmission pipeline. It has a heat exchanger; raw flue gas is heat exchanged and its temperature increased. It passes through the heat exchanger and is then processed in step l) and the clean flue gas It passes through a heat exchanger to reduce its temperature and then is discharged. It is either processed or mixed with ammonia gas. Ideally, the heat exchanger is a GGH heat exchanger. Ideally, the process should also include the following: 6) Sulfur in raw flue gas, represented as sulfur oxides in %. Measurement of oxide concentrations; represented as percentages in the form of nitrogen oxides. Measurement of the concentration of nitrogen oxides in the raw flue gas; in percentage. Ammonia in the discharged clean flue gas is represented as escaping ammonia. Measurement of the gas concentration; raw flue gas, represented as Qflue gas. Measurement of the gas flow rate; where in step l), ammonia gas in an amount of Qnh3 is being sprayed, QnH3 = Qflue gas X (hCsulfur oxides + / ^Canitrogen oxides _ Cescaped ammonia); Here, 'a' is the amount of ammonia gas consumed by sulfur dioxide in the flue gas, 0.4-1.5. preferably a reaction coefficient of 0.5-1.2 and even more preferably 0.6-1; and h, 0.5-2% of ammonia gas consumed by nitrogen oxides in flue gas, preferably It is a reaction coefficient of 0.6-1.5 and preferably 0.7-1.2. According to the second application of the present invention, flue gas containing multiple pollutants can be mixed together. A device is provided for purifying it in this way. The apparatus for treating flue gas with multiple pollutants simultaneously is a desulfurizer. denitrifying and adsorbing process device (1), an SCR denitrifying process device (2), a CO catalytic oxidation process device (3) and an ammonia gas spraying device (4) It includes a raw flue gas transmission pipeline (Ll) desulfurizer and 1738761.03 The adsorbing process device (1) is connected to a gas inlet; desulfurizing and adsorbing a gas outlet of the denitrifying process device (1) of the SCR denitrifying process device (2) a deep-seated desulfurized flue gas transmission pipeline to the gas inlet It is connected via a gas outlet of the SCR denitrifying process device (2). A denitrified CO2 catalytic oxidation process device (3) has a gas inlet. It is connected via a flue gas transmission pipeline; an ammonia gas spray The device (4) is located inside the raw flue gas transmission pipeline (Ll); and ammonia gas to the ammonia gas spraying device (4) an ammonia gas transmission pipe It is fed via line (L4). Preferably, the apparatus also includes a second SCR denitrifying process device (5) here is the exhaust port of the CO catalytic oxidation process device (3) second SCR A denitrifying process device (5) has a CO removed flue to a gas inlet. The gas is connected via the transmission pipeline (L5) and the second SCR denitrifier The process device (5) has an exhaust vent to a clean flue gas transmission pipeline (L6) It is connected. Preferably, the apparatus also includes an ammonia gas mixer (6), wherein one ammonia gas transmission pipeline (L4) and a hot medium transmission pipeline (L7) The gas is connected to a gas inlet of the mixer (6); and the ammonia gas of the mixer (6) for conveying a mixed gas consisting of ammonia gas and hot environment from a gas outlet to an ammonia gas spraying device (4) via a pipeline (L8) It is connected. Preferably, the apparatus includes a heat exchanger (7), where the heat exchanger (7) is respectively raw flue gas transmission pipeline (L1) and clean flue gas transmission pipeline (L6) is connected, and the heat exchanger(7) is connected to the raw flue gas transmission pipeline (Ll). The connection location is upstream of the ammonia gas spray device (4). Preferably, the clean flue gas transmission pipeline (L6) is connected to the hot medium transmission pipeline (L7) It is connected upstream. 1838761.03 Preferably, a desulfurizer inside the desulfurizing and adsorbing process device (1). An adsorbing and absorbing layer or a molecular sieve is provided. Desulfurization adsorbent and absorbing layer or molecular sieve calcium oxide and / or activated It is carbon. Preferably, the heat exchanger (7) is a GGH heat exchanger. Ideally, the raw flue gas transmission pipeline (Ll) should have a flue gas flow rate monitoring sensor. (Ql), a sulfur oxide concentration monitoring sensor (Cl) and a nitrogen oxide sensor. It is equipped with a concentration monitoring sensor (C2). Ammonia gas transmission pipeline (L4) has an ammonia gas flow rate monitoring sensor (Q3). Clean flue gas Transmission pipeline (L6) has an ammonia gas concentration measuring device (C3). The flow rate of raw flue gas is measured by the flue gas flow rate monitoring sensor (Ql). The rate is represented as Qbaca gas; sulfur oxide concentration monitoring. The concentration of sulfur oxides in the raw flue gas, as measured by the sensor (Cl), is % They are represented as sulfur oxides; nitrogen oxide concentration monitoring. Nitrogen oxide concentration in raw flue gas measured by sensor (C2) % It is represented in the form of CaZot oxides; and ammonia gas concentration Ammonia in discharged clean flue gas measured by measuring device (C3) Gas concentration is represented as Cease of ammonia, in percentage. The calculation is as follows: QnH3 — Qflue gas X (ilCsulfur oxides TT^Canitrogen oxides _ Cessing ammonia); Here, 'a' is the amount of ammonia gas consumed by sulfur dioxide in the flue gas, 0.4-1.5. preferably a reaction coefficient of 0.5-1.2 and even more preferably 0.6-1; and b, 0.5-2% of ammonia gas consumed by nitrogen oxides in flue gas, preferably The reaction coefficient is 0.6-1.5, and preferably 0.7-1.2. Ammonia gas. The flow rate is checked on a reading from the flow rate monitoring sensor (Q3). 1938761.03 Example 1 It is a process for treating flue gas with multiple pollutants simultaneously, This includes the following steps: 1) Ammonia gas is injected into the raw flue gas, and the ammonia gas mixes with the raw flue gas. mixed: 2) To carry out the thorough desulfurization process of raw flue gas and ammonia gas and raw materials are used to obtain thoroughly desulfurized flue gas. The mixed gas from the flue gas undergoes desulfurization and adsorption processes. It has been abandoned. 3) The flue gas that was thoroughly desulfurized in Step 2 is then denitrified. To achieve this, it underwent SCR denitrification. 4) Flue gas denitrified in Step 3, CO removed from flue gas. It was passed through a CO2 catalytic oxidation process device. Example 2 Example 1 has been repeated except that the process includes the following: 5) Deep denitrification of flue gas to obtain clean flue gas. to carry out the operation, after the CO removal process in step 4). The flue gas was subjected to SCR denitrification again. Example 3 Except for the raw flue gas containing less than 100 mg / m3 of sulfur oxide, Example 2 has been repeated. After the deep desulfurization process in Step 2), Flue gas that has been thoroughly desulfurized contains less than 5 mg / m3. It contained sulfur oxide. The raw flue gas is desulfurized sintering flue gas. Raw flue gas has a temperature lower than 280°C. Ammonia in Step 1). the gas required to remove sulfur oxides and nitrogen oxides from raw flue gas 2038761.03 An amount of ammonia gas equal to 1.2 times the total amount was sprayed. Example 4 In Step 1), apart from the fact that ammonia gas is sprayed specifically in the following way, Example This was repeated 3 times: mixing ammonia gas with a hot environment and stirring. the gas is sprayed into the raw flue gas and then ammonia gas and from the hot environment Mixing the resulting mixed gas with raw flue gas. Hot environment, hot air. or the clean flue gas obtained in step 5). Example 5 The raw flue gas transmission pipeline and the clean flue gas transmission pipeline form a heat source. by having a heat exchanger and exchanging heat with the raw flue gas through the heat exchanger The clean flue gas is heated and then processed in step l) through a heat exchanger. by cooling and then evacuating or mixing with ammonia gas Example 4 is repeated except for this one. The heat exchanger is a GGH heat exchanger. Example 6 Example 5 is repeated except that the process also includes the following: 6) The concentration of sulfur oxides in the raw flue gas was measured, and % It is represented by sulfur oxides. Nitrogen oxides in raw flue gas. Concentration has been measured and is represented as % in terms of CaZot oxides. Discharge. The concentration of ammonia gas in the cleaned flue gas was measured, and it was determined as a percentage. The amount of ammonia that escapes is represented by C. The flow rate of the raw flue gas was measured. is represented by Qbaca gas. In step 1), ammonia gas is present in an amount of NH3. It has been sprayed. QnH3 — Qflue gas X (^Csulfur oxides + bCanitrogen oxides - Cessing ammonia); 2138761.03 Here, 'a' is the 0.8% ammonia gas consumed by sulfur dioxide in the flue gas. is the reaction coefficient; and b is the reaction coefficient of nitrogen oxides in the flue gas. The ammonia gas consumed has a reaction coefficient of 1.1. Example 7 An apparatus for the simultaneous treatment of flue gas containing multiple pollutants. Desulfurizing and adsorbing process device (1), an SCR denitrifying process device (2), a CO catalytic oxidation process device (3) and an ammonia gas It includes a spray device (4). A raw flue gas transmission pipeline (Ll) The desulfurizing and adsorbing process device (1) is connected to a gas inlet. A gas outlet of the desulfurizing and adsorbing process device (1) is a deep-sea gas outlet. SCR denitrifying process via desulfurized flue gas conveying device The device (2) is connected to a gas inlet. SCR denitrifying process device (2) a gas outlet a denitrified flue gas through a transmission pipeline CO The catalytic oxidation process device (3) is connected to a gas inlet. Raw flue gas An ammonia gas injection device (4) is provided in the transmission pipeline (Ll). Ammonia gas is pumped into the ammonia gas spraying device (4) through an ammonia gas transmission pipe This was provided via line (L4). Example 8 Example 7 except that the apparatus includes a second SCR denitrifying process device (5) It has been repeated. The exhaust port of the CO catalytic oxidation process device (3) is one Second SCR via flue gas transmission pipeline (L5) with CO removed. The denitrifying process device (5) is connected to a gas inlet and the second SCR The denitrifying process device (5) has an exhaust vent and a clean flue gas transmission pipe. It is connected to line (L6). 2238761.03 Example 9 The apparatus includes an ammonia gas mixer (6), an ammonia gas transmission pipeline (L4) and a hot environment transmission pipeline (L7) ammonia gas mixer (6) a gas It depends on the inlet; and ammonia gas mixer (6) has a gas outlet ammonia gas and an ammonia gas spray to convey the mixed gas formed from a hot environment Example 8 repeats except that the device (4) is connected via a pipeline (L8). It has been done. Example 10 The apparatus includes a heat exchanger (7), where the heat exchanger (7) is respectively raw flue being connected to the gas transmission pipeline (L1) and the clean flue gas transmission pipeline (L6), and the connection of the heat exchanger (7) with the raw flue gas transmission pipeline (Ll) except that its location is upstream of the ammonia gas spray device (4) Example 9 has been repeated. Clean flue gas transmission pipeline (L6) hot medium transmission. It is connected upstream of the pipeline (L7). Example 11 A desulfurizer and adsorbent inside the desulfurizing and adsorbing process device (1) Unless an adsorbing layer or a molecular sieve is provided, Sample 10 repeat It has been made. Desulfurizing and adsorbing layer or molecular sieve calcium It is oxide and / or activated carbon. The heat exchanger (7) is a GGH heat exchanger. Example 12 A flue gas flow rate monitoring sensor (Ql) of the raw flue gas transmission pipeline (Ll), 2338761.03 a sulfur oxide concentration monitoring sensor (Cl) and a nitrogen oxide concentration sensor Example 11 has been repeated, except that it is equipped with a tracking sensor (C2). Ammonia gas transmission pipeline (L4) has an ammonia gas flow rate monitoring sensor. (Q3) has. Clean flue gas transmission pipeline (L6) contains ammonia gas. It has a concentration measuring device (C3) and a flue gas flow rate monitoring sensor (Ql). The flow rate of raw flue gas was measured and represented by Qflue gas. Sulfur oxide Concentration monitoring sensor (Cl) of sulfur oxides in raw flue gas It measured the concentration, which was represented as % in the form of sulfur oxides. The nitrogen oxide concentration monitoring sensor (C2) monitors the nitrogen in the raw flue gas. They measured the concentration of oxides, which was expressed as % in the form of Cazotoxide. It is represented. The ammonia gas concentration measurement sensor (C2) is discharged. They measured the concentration of ammonia gas in the flue gas, expressed as a percentage. C is represented as ammonia. The calculation is as follows: QnH3 — Qflue gas X (trace sulfur oxides + / 'Cazot oxides - Cessing ammonia); Here, 'a' is the 0.8% ammonia gas consumed by sulfur dioxide in the flue gas. is the reaction coefficient; and b is the reaction coefficient of nitrogen oxides in the flue gas. The ammonia gas consumed has a reaction coefficient of 1.1. Ammonia gas The flow rate monitoring sensor (Q3) was checked on a reading from ^^3. Experiments were conducted based on samples. Containing sulfur dioxide, nitrogen oxides, and carbon monoxide, in different masses. Simulated flue gases with specific concentrations were quantitatively obtained. Various simulated flue gases were processed under sufficient ammonia gas and further then NOX and CO with and without deep desulfurization Removal efficiencies have been measured. 2438761.03 Data obtained from NOx removal experiments are compared below. Deep Desulfurization Adsorption desulfurization SCR NOx after the sulfur layer after sulfur reaction remove dioxide is regulated dioxide temperature mA rate concentration is regulated concentration (°C) (%) mg / m3 mg / m3 98 no 98 320 56.4 98 yes 8.31 320 96.8 98 no 98 260 48.2 98 yes 8.31 260 90.7 98 no 98 220 39.7 98 yes 8.31 220 90.2 98 no 98 180 37.6 98 yes 8.31 180 86.3 98 no 98 150 34.5 98 yes 8.31 150 83.4 50 no 50 320 64.9 50 yes 4.19 320 97.1 50 no 50 260 51.4 50 yes 4.19 260 93.8 50 no 50 220 43.1 50 yes 4.19 220 91.9 50 no 50 180 39.2 50 yes 4.19 180 90.6 50 no 50 150 36 Yes 50 4.19 150 86.9 No 30 320 66.3 Yes, 2.48 320 98.8 No 30 260 53.9 Yes, 2.48 260 95.2 No 30 220 45.2 Yes, 2.48 220 94.5 No 30 180 42.6 Yes, 2.48 180 91.9 No 30 150 38.6 Yes, 2.48 150 89.2 Notes: 2538761.03 OCX iflcmtn&n wcbara aazinaata Μ> .«.Kailrmjrucn îonrahara aarjndoia iwnuzuhara «an^U, iwr* W, jzattisirmj ha)------------------------------------------:-------------------:--------- ;---------------------------------------------:-------------------------------- ------ .—i---------- X MW ULff îticmmaen stubbornness· hara ^awndaia kîh*.' In the experiments, the technical solution described in the present invention was used, and SCR The chimney is formed by arranging an adsorption layer before the denitrification process. the gas is thoroughly desulfurized, which increases the denitrification rate of SCR. It has been greatly improved, and the denitrification effect of SCR is relatively low. it can be preserved even under high temperature conditions, thus denitrifying. a reduced reaction which greatly reduces the cost of denitrification It has been found that this can also be done at high temperatures. Data obtained from CO removal experiments are compared below. Deep Desulfurization Adsorption of CO desulfurization CO catalytic layer of sulfur afterwards After that, the sulfur disappeared. dioxide regulation and oxidation dioxide RMA rate temperature for regulating concentration concentration (%) mg / m3 (°C) mg / m3 No 98 98 300 81.7 98 yes 8.31 300 98.8 98 no 98 240 80.2 98 yes 8.31 240 95.7 98 no 98 200 79.6 98 yes 8.31 200 92.2 98 no 98 160 77.4 98 yes 8.31 160 88.3 98 no 98 130 76.5 98 yes 8.31 130 85.4 50 no 50 300 82.9 Yes 50 4.19 300 99.1 50 no 50 240 81.7 50 yes 4.19 240 97.8 50 no 50 200 80.1 50 yes 4.19 200 95.2 50 no 50 160 79.2 50 yes 4.19 160 93.6 2638761.03 50 no 50 130 78 Yes 50 4.19 130 90.9 No 30 300 84.3 Yes, 2.48 300 99.8 No 30 240 82.9 Yes, 2.48 240 98.2 No 30 200 82 Yes, 2.48 200 96.5 No 30 160 80.6 Yes, 2.48 160 94.5 No 30 130 78.6 Yes, 2.48 130 92.2 Notes: LU JileminArn «nar hara aazjndAo LU çendi- LU JileminjVn «mra hara aazjnAıla J wmJZ hva aazj»LU jcerj^j «Juuttıeınna hnı - .. ---------------------------i------------------------------------------- ------------------------------------------------------ X MW LU Jilemjruen we h^a ^azjndala LU Joerj^j The experiments showed that after the prior introduction of ammonia gas, deep Removal of sulfur dioxide by desulfurization process with CO catalytic It can prevent the poisoning of the oxidizer and the CO catalytic oxidation process. the CO concentration in the sintering flue gas entering the device is relatively low which can increase, thus the CO catalytic oxidation process device. decarbonization efficiency was increased; and a low-temperature CO catalytic oxidizer. Even when used in a low-temperature environment, a high degree of decarbonization is achieved. It can be concluded that efficiency can be achieved. The above description pertains only to the preferred applications of the present invention. In technology by an expert, various improvements and enhancements without deviating from the essence of the existing invention. modifications can be made and these improvements and modifications It should be understood that the existing invention must be within the scope of protection. 271 / 4 flue gas SCR denitrification process CO catalytic oxidation process FIGURE 12 / 4 flue gas ammonia gas clean flue gas FIGURE 23 / 4 FIGURE 44 / 4 FIGURE 6

Claims

1. A process for treating flue gas with multiple pollutants simultaneously. and includes the following steps: 1) Injecting ammonia gas into the raw flue gas and the ammonia gas into the raw mixing with flue gas; 2) to carry out the deep desulfurization process of raw flue gas and ammonia gas and raw materials are used to obtain thoroughly desulfurized flue gas. The mixed gas from the flue gas is subjected to desulfurization and adsorption processes. abandonment; 3) To perform the denitrification process of the flue gas, go to step 2). The deeply desulfurized flue gas is subjected to SCR denitrification process. being held; and 4) To perform the CO removal process from the flue gas, follow step 3). denitrified flue gas from a CO catalytic oxidation process device passing through.

2. This is a process according to claim 1, and it also includes the following: 5) Deep denitrification of flue gas to obtain clean flue gas To accomplish this, after the CO removal process in step 4, the flue gas... It must be subjected to SCR denitrification again.

3. The process is according to claim 1 or 2, where the raw flue gas is less than 100 mg / m3, preferably less than 80 mg / m3 and even more preferably less than 50 mg / m3 of sulfur It contains oxides; After the deep desulfurization process in step 2), the deep desulfurized The treated flue gas should have an acid content of less than 10 mg / m3, preferably less than 8 mg / m3, even more preferably 5 mg / m3. It contains sulfur oxides in amounts less than mg / m3; and / or 2838761.03 raw flue gas obtained by desulfurizing a sintering flue gas It is flue gas, and the raw flue gas is preferably heated to a temperature lower than 320°C. A temperature lower than 300°C, and preferably higher than 280°C. It has a low temperature.

4. The process is according to claim 2 or 3, where in step l) ammonia gas and sulfur The total amount required to remove oxides and nitrogen oxides from raw flue gas. an amount of ammonia gas 1-2 times the amount, preferably 1.05-1.5 times and even more preferably It is sprayed in a quantity of 1.1-1.2 times the amount; and / or In step l), the ammonia gas is sprayed specifically as follows: This is accomplished by: mixing ammonia gas with a hot environment and the mixed gas is sprayed into the raw flue gas, followed by ammonia gas and hot mixing the resulting mixed gas from the environment with raw flue gas; Here, the warm environment is either hot air or clean flue gas obtained in step 5).

5. The process according to either of claims 2-4, where a raw flue gas The transmission pipeline and a clean flue gas transmission pipeline have a heat exchanger; Raw flue gas undergoes heat exchange and its temperature is increased through a heat exchanger. It is passed through and then processed in step l); and The clean flue gas passes through a heat exchanger to reduce its temperature and further It is then either discharged or mixed with ammonia gas; Here, the heat exchanger is preferably a GGH heat exchanger.

6. This is a process according to claim 4, and it also includes the following: 6) Sulfur in raw flue gas, represented as sulfur oxides in %. Measurement of oxide concentrations; represented as percentages in the form of nitrogen oxides. Measurement of the concentration of nitrogen oxides in the raw flue gas; in percentage. Ammonia in the discharged clean flue gas is represented as escaping ammonia. Measurement of the gas concentration; raw flue gas, represented as Qflue gas. 2938761.03 measuring the flow rate of gas; Here, in step 1), ammonia gas is sprayed in an amount of NH4: Qnh3 = Qflue gas X (ilCsulfur oxides T- ZlCnitrogen oxides - Cescaped ammonia); where 'a' is the ammonia gas consumed by sulfur dioxide in the flue gas. The reaction coefficient is 0.4-1.5, preferably 0.5-1.2, and even more preferably 0.6-1; and b, 0.5-2 of the ammonia gas consumed by nitrogen oxides in the flue gas, The reaction coefficient is preferably between 0.6-1.5 and even more preferably between 0.7-1.

2.

7. An apparatus for the simultaneous treatment of flue gas containing multiple pollutants. and is a desulfurizing and adsorbing process device (1), an SCR denitrifier processing device (2), a CO catalytic oxidation processing device (3) and an ammonia gas It includes a spray device (4); Here is a raw flue gas transmission pipeline (Ll) desulfurizer and adsorbent The processing device (1) is connected to a gas inlet; desulfurizing and adsorbing process The device (1) has a gas outlet, a deep desulfurized flue gas transmission. via pipeline to a gas inlet of the SCR denitrification processing device (2) It is connected to a gas outlet of the SCR denitrification processing device (2), a denitrified through a flue gas transmission pipeline to the CO catalytic oxidation process device. (3) is connected to a gas inlet; inside the raw flue gas transmission pipeline (Ll) Ammonia gas spraying device (4) is provided; and ammonia gas ammonia gas via an ammonia gas transmission pipeline (L4) to the spraying device (4). It is nourished.

8. The apparatus is in accordance with claim 7, and also includes a second SCR denitrifying process. The device (5) includes an exhaust of the CO catalytic oxidation process device (3). The hole of the second SCR denitrifying process device (5) is a CO₂ gas inlet. It is connected via the removed flue gas transmission pipeline (L5) and the second The SCR denitrifying process device (5) has an exhaust port for a clean flue gas transmission. 3038761.03 is connected to the pipeline (L6); and / or It also includes an ammonia gas mixer (6), where an ammonia gas transmission pipeline (L4) and a hot environment transmission pipeline (L7) ammonia gas The mixer (6) is connected to a gas inlet; and ammonia gas is connected to the mixer (6) a gas outlet for conveying a mixed gas consisting of ammonia gas and a hot environment The ammonia gas spraying device (4) is connected via a pipeline (L8).

9. The apparatus is in accordance with claim 8 and also includes a heat exchanger (7) where heat heat exchanger (7) to the raw flue gas transmission pipeline (Ll) and clean flue gas transmission pipeline respectively. It is connected to the pipeline (L6), and the raw flue gas transmission pipe of the heat exchanger (7). The connection position with line (Ll) is above the ammonia gas spraying device (4). is in the flow; and / or clean flue gas transmission pipeline (L6) hot medium transmission pipeline (L7) It connects upstream.

10. According to claim 9, the apparatus is used for desulfurizing and adsorbing processes. a desulfurizing and adsorbing layer or a molecular inside the device (1) A sieve is provided; here the desulfurizing and adsorbing layer or molecular sieve is calcium oxide and / or activated carbon; and / or The heat exchanger (7) is a GGH heat exchanger.

11. Apparatus according to any of claims 8-10, where raw flue gas The transmission pipeline (Ll) is connected to a flue gas flow rate monitoring sensor (Q1), a sulfur oxide concentration monitoring sensor (Cl) and a nitrous oxide concentration monitor It has a sensor (C2); ammonia gas transmission pipeline (L4) has an ammonia gas flow It has a speed monitoring sensor (Q3); clean flue gas transmission pipeline (L6) It has an ammonia gas concentration measuring device (C3); Here, the raw flue gas flow rate is measured by the flue gas flow rate monitoring sensor (Ql). 3138761.03 The gas flow rate is represented as Qflue gas; sulfur oxide concentration Sulfur oxide in raw flue gas as measured by monitoring sensor (Cl). Concentration is represented as % in the form of sulfur oxides; nitrogen oxides. Nitrous oxide concentration in raw flue gas measured by the monitoring sensor (C2) Concentration is represented as percentages in the form of nitrogen oxides; and ammonia. Clean exhaust flue gas measured by gas concentration measuring device (C3) The concentration of ammonia gas in the gas is represented as Cease of ammonia, in percentage terms. is being done; The calculation is as follows: QnH3 = Qflue gas X (tzCsulfur oxides + bCanitrogen oxides “ Cescaped ammonia); Here, 'a' is the ammonia gas consumed by sulfur dioxide in the flue gas. The reaction coefficient is 0.4-1.5, preferably 0.5-1.2, and even more preferably 0.6-1; and b, 0.5-2 of the ammonia gas consumed by nitrogen oxides in the flue gas, The reaction coefficient is preferably 0.6-1.5 and even more preferably 0.7-1.2; and a reading from the ammonia gas flow rate monitoring sensor (Q3) is checked. is being done. 32

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