Method for reducing carbon consumption of sintering flue gas activated carbon purification system

Abstract

The invention discloses a method for reducing carbon consumption of a sintering flue gas activated carbon purification system. The sulfur content in activated carbon discharged from an adsorption tower is controlled not to exceed 2.5 wt% of the activated carbon. According to the method, the consumption of activated carbon in a sintering flue gas purification system can be reduced, so that the flue gas purification cost is reduced; the method can be realized by adjusting parameters of the flue gas purification system, and is simple and easy to implement.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering pellets in iron and steel metallurgy, and in particular to a method for reducing carbon consumption in a sintering flue gas activated carbon purification system. Background Art

[0002] With the improvement of environmental protection requirements, activated carbon desulfurization and denitrification technology for sintering flue gas has come to the fore. Its flue gas purification effect is not only better than the emission standards set by national environmental protection regulations, but also can remove NO simultaneously while desulfurizing. x, remove dioxins, remove heavy metals and dust. The activated carbon adsorption flue gas desulfurization process can not only remove pollutants in the flue gas, but also recycle sulfur resources in the flue gas. It is an efficient resource-based flue gas desulfurization process. At present, there are many studies on the activated carbon flue gas purification process. There are studies on the mechanism of activated carbon desulfurization and denitrification, which point out that activated carbon desulfurization and denitrification have two forms: physical adsorption and chemical adsorption, and study the thermodynamic environment of the desulfurization and denitrification chemical adsorption reaction. Based on the mechanism of activated carbon adsorption desulfurization and denitrification, there are also many studies on activated carbon. Studies have pointed out that the specific surface area, surface pore structure, surface functional groups and active components of activated carbon have a great influence on the desulfurization and denitrification performance of activated carbon. Appropriately increasing the oxygen and nitrogen functional groups or surface active components of activated carbon is conducive to the synergistic growth of the physical adsorption and chemical adsorption capabilities of activated carbon. Research has focused on factors influencing activated carbon desulfurization and denitrification, examining the impact of activated carbon particle size, flue gas temperature, and activated carbon quality on the desulfurization rate of sintering flue gas. Other studies have used the controlled variable method to investigate the effects of operating parameters such as SO2 volume fraction, flue gas temperature, inlet pressure, and flue gas throughput on desulfurization efficiency. Furthermore, studies have examined the effects of metal oxide loading on desulfurization and denitrification. Furthermore, during the sintering flue gas purification process, activated carbon properties can easily change with regeneration and recycling, potentially affecting further flue gas purification efficiency. Based on this, studies have analyzed the performance changes of activated carbon during flue gas purification. These studies have shown that after adsorption or waste, fixed carbon decreases while volatile matter and ash increase. The increase in volatile matter is primarily due to the adsorption of elements such as K, Na, F, and Cl, while the increase in ash is primarily due to the adsorption of Ca and Fe. Particles adsorbed during the purification process accumulate on the surface of waste activated carbon, forming a wood-like, loose structure. This clogging of activated carbon pores reduces the specific surface area and total pore volume, thus affecting the recycling efficiency of the activated carbon. Activated carbon can be regenerated in the activated carbon desulfurization and denitrification process, so research has been conducted on the regeneration of activated carbon. Some studies have examined the effects of flue gas components on the thermal regeneration process of desulfurized activated carbon, pointing out that water vapor inhibits the reaction between carbon and sulfuric acid, and CO2 has no effect on the thermal regeneration reaction of desulfurized activated carbon. In the presence of O2, carbon will oxidize to produce CO2, causing carbon consumption. Therefore, activated carbon regeneration uses nitrogen as the balance gas in the thermal regeneration process. In order to clarify the influence of activated carbon analysis parameters on the activated coke regeneration process and regeneration effect, some studies have explored the changes in the residual sulfur ratio of activated coke, the amount of CO2 and CO generated, and the desulfurization and denitrification performance of regenerated activated coke with the analysis temperature and analysis time through thermal analysis tests, and then clarified the appropriate activated coke thermal analysis parameters.

[0003] Activated carbon can be regenerated, but it is lost during the adsorption and desorption process. Currently, there is very little research on the causes and amount of activated carbon loss in sintering flue gas activated carbon purification systems. Only the analysis of activated carbon consumption in activated carbon flue gas purification systems in pellet production has been retrieved. This flue gas purification system is similar to the current sintering flue gas activated carbon purification system. The analysis shows that activated carbon consumption consists of two parts: chemical consumption and physical consumption. During desorption, the H2SO4 adsorbed by the activated carbon reacts with C to be reduced to SO2, and at the same time, the activated carbon is "activated and regenerated" to restore and enhance its absorption of SO2 and NO. X This process, which improves the adsorption properties of substances such as carbon, chemically consumes the activated carbon. Physical consumption occurs at every stage of the activated carbon cycle. Mechanical forces such as collision, friction, and compression cause the activated carbon particles to break and wear, gradually reducing their size. The particles eventually exit the system through air screens, dust removal pipelines, and vibrating screen undersize. Chemical consumption reduces the strength of the activated carbon and increases physical consumption. Alternatively, a bubbling bed activated carbon desulfurization process can be used. This process uses powdered activated carbon, which is not affected by breakage or wear, resulting in minimal physical loss of activated carbon. This process can reduce activated carbon consumption, but it has not yet been industrialized. Summary of the Invention

[0004] The present invention aims at the desulfurization and denitrification process of the activated carbon flue gas purification system, as SO2 and NO X The reaction with activated carbon during the adsorption and decomposition process, as well as the decomposition of activated carbon under high temperature during the adsorption and decomposition process, changes the structure of the activated carbon, causing the activated carbon to break and be lost. In order to reduce the loss of activated carbon, a method for reducing the carbon consumption of the sintering flue gas activated carbon purification system is proposed.

[0005] To achieve the above object, the present invention provides a method for reducing carbon consumption in a sintering flue gas activated carbon purification system, which controls the sulfur content in the activated carbon coming out of the adsorption tower to not exceed 2.5wt% of the activated carbon.

[0006] Furthermore, the decomposition temperature W°C and decomposition time Tmin of the activated carbon in the decomposition tower are controlled: The decomposition temperature of the decomposition tower is W: 360 ~ 440; The analysis time T of the analysis tower is not less than T0, T0=(420-W)×1.5+180.

[0007] The principle of controlling the decomposition temperature W℃ and decomposition time Tmin is: on the basis of meeting the flue gas purification requirements, the lower the temperature control within the decomposition temperature range, the more conducive to reducing carbon consumption, and the shorter the decomposition time, the more conducive to reducing carbon consumption.

[0008] Furthermore, the content of calcium and magnesium dust in the flue gas at the adsorption tower inlet is reduced; the dust removal efficiency of the electrostatic precipitator in front of the adsorption tower inlet is increased; and / or a water seal system is arranged before the flue gas enters the adsorption tower to remove calcium and magnesium dust in the inlet flue gas.

[0009] The present invention first reduces the consumption of activated carbon by reducing the amount of sulfate and sulfite needle crystals generated in the activated carbon in the adsorption tower. Through research and analysis, it was found that the calcium and magnesium elements introduced into the flue gas dust react with sulfate and sulfite to generate sulfate and sulfite, which precipitate in the form of needle crystals. This crystal form is very different from the plate-like structure of the activated carbon itself. The generated needle-shaped sulfate and sulfite crystals produce internal stress changes, causing the activated carbon to break. Therefore, reducing the amount of calcium and magnesium elements in the flue gas dust can reduce the consumption of activated carbon. Second, the consumption of activated carbon is reduced by controlling the sulfur content of the activated carbon when it exits the adsorption tower to no more than 2.5wt%. This is because the analysis test of the activated carbon sampled after adsorption in the adsorption tower found that when the sulfur content in the activated carbon is higher than 2.5wt%, the broken rate of the activated carbon after analysis is significantly increased, and when the sulfur content does not exceed 2.5wt%, the broken rate of the activated carbon is very low. Therefore, controlling the sulfur content of the activated carbon when it exits the adsorption tower can control the broken rate of the activated carbon. The third is to reduce the consumption of activated carbon by controlling the decomposition temperature and decomposition time of the activated carbon decomposition tower. This is because the decomposition test of the activated carbon after adsorption in the adsorption tower found that the decomposition temperature has a greater impact on the activated carbon breakage rate than the decomposition time. Therefore, the decomposition temperature is controlled within a certain range, and then the decomposition time is controlled according to the sulfur removal rate requirements during the activated carbon decomposition, so that the sulfur removal rate requirements are met while the activated carbon breakage rate is lower.

[0010] Compared with the prior art, the beneficial effects of the present invention are: the method of the present invention can reduce the consumption of activated carbon in the sintering flue gas purification system, thereby reducing the cost of flue gas purification; and it can be achieved by adjusting the parameters of the flue gas purification system, which is simple and easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0012] Combine Figure 1 The method of reducing carbon consumption of the activated carbon purification system for sintering flue gas of the present invention includes the following methods: There are several methods to reduce the amount of sulfate and sulfite needle crystals in the activated carbon of the adsorption tower, including but not limited to the following: Increase the dust removal efficiency of the electrostatic precipitator in front of the adsorption tower inlet to reduce the content of calcium and magnesium dust in the flue gas at the adsorption tower inlet, and / or arrange a water seal system before the flue gas enters the adsorption tower to remove calcium and magnesium dust in the inlet flue gas; Flue gas activated carbon adsorption tower desulfurization: sintering flue gas enters the activated carbon adsorption tower for desulfurization, and the purified flue gas after desulfurization is discharged into the atmosphere through the large flue; the activated carbon after adsorbing SO2 gas is sent to the analysis tower for analysis, and the sulfur content in the activated carbon coming out of the adsorption tower is controlled not to exceed 2.5wt% of the activated carbon.

[0013] Activated carbon analysis: Control the analysis temperature W℃ and analysis time Tmin of the activated carbon in the analysis tower: The decomposition temperature of the decomposition tower is W: 360 ~ 440; The analysis time T of the analysis tower is not less than T0, T0=(420-W)×1.5+180.

[0014] The principle of controlling the decomposition temperature W and decomposition time T is: on the basis of meeting the flue gas purification requirements, the lower the temperature control within the decomposition temperature range, the more conducive to reducing carbon consumption, and the shorter the decomposition time, the more conducive to reducing carbon consumption.

[0015] Record the weight M of the activated carbon after analysis and send it to a 1.2mm aperture sieve for screening: after screening, record the weight ms of the activated carbon on the sieve and send it back to the activated carbon desulfurization tower for recycling; the activated carbon under the sieve is discarded, and its weight mx is recorded and sent to the waste yard.

[0016] 5) Calculate the activated carbon loss S: The calculation formula is S=(M-ms) / M.

[0017] Example 1 Example 1 is a comparative example, in which the method and measures of the present invention are not adopted. On-site production includes the following steps: Conventional electrostatic precipitator for sintering flue gas, dust concentration in the flue gas at the inlet of activated carbon adsorption tower is H=38.54 mg / Nm 3 ; 2) Flue gas adsorption tower desulfurization: Sintering flue gas enters the activated carbon adsorption tower for desulfurization. After desulfurization, the purified flue gas is discharged into the atmosphere through the large flue. The activated carbon after adsorbing SO2 gas is sent to the desorption tower for desorption. The sulfur contents of the activated carbon in the six bins are: 2.74wt%, 2.98wt%, 3.3wt%, 1.68wt%, 1.64wt%, and 1.1wt% respectively. 3) Activated carbon analysis: The analysis parameters are as follows: a. The decomposition temperature of the decomposition tower is controlled at 442°C. b. The analysis time Tmin of the analysis tower is controlled to be: T=180; 4) Record the weight of the activated carbon after analysis M=24.67t / h, and send it to a 1.2mm aperture sieve for screening: after screening, record the weight of the activated carbon on the sieve ms=24.16t / h, and send it back to the activated carbon desulfurization tower for recycling; the activated carbon under the sieve is discarded, and its weight mx=0.48t / h is recorded and sent to the waste yard.

[0018] 5) Calculate the activated carbon loss S: The calculation formula is S = (M-ms) / M = (24.67-24.16) / 24.67 = 2.07%.

[0019] Example 2 1) Reduce the amount of sulfate and sulfite needle crystals in the activated carbon of the adsorption tower by using the following methods: The dust removal efficiency of the electrostatic precipitator in front of the adsorption tower inlet is increased to reduce the calcium and magnesium dust in the inlet flue gas. Since the amount of calcium and magnesium dust cannot be recorded separately, the total dust content in the flue gas at the inlet of the activated carbon adsorption tower is recorded to characterize the amount of calcium and magnesium dust. The recorded dust content is H = 31.49 mg / Nm 3 .

[0020] 2) Flue Gas Adsorption Tower Desulfurization: No measures were taken. Sintering flue gas enters the activated carbon adsorption tower for desulfurization. After desulfurization, the purified flue gas is discharged into the atmosphere through a large flue. The activated carbon, which has absorbed SO2, is then sent to the desulfurization tower for desulfurization. The sulfur contents of the activated carbon in the six bins were 2.85wt%, 3.04wt%, 3.17wt%, 1.72wt%, 1.58wt%, and 1.21wt%, respectively.

[0021] 3) Activated carbon analysis: The analysis parameters are as follows: a. The decomposition temperature of the decomposition tower is controlled at 421°C. b. The decomposition time Tmin of the decomposition tower is controlled as follows: T = (420-421) × 1.5 + 180 = 178.5; c. The control principle of desorption temperature W℃ and desorption time Tmin is: on the basis of meeting the flue gas purification requirements, the lower the temperature control within the desorption temperature range, the more conducive to reducing carbon consumption; the shorter the desorption time, the more conducive to reducing carbon consumption; 4) Record the weight of the activated carbon after analysis M=26.34t / h, and send it to a 1.2mm aperture sieve for screening: after screening, record the weight of the activated carbon on the sieve ms=25.82t / h, and send it back to the activated carbon desulfurization tower for recycling; the activated carbon under the sieve is discarded, and its weight mx=0.49t / h is recorded and sent to the waste yard.

[0022] 5) Calculate the activated carbon loss S: The calculation formula is S = (M-ms) / M = (26.34-25.82) / 26.34 = 1.97%.

[0023] Example 3 To reduce the formation of sulfate and sulfite needle-like crystals in the activated carbon of the adsorption tower, use the following methods: Before the flue gas enters the adsorption tower, a water seal system is set up to remove calcium and magnesium dust in the inlet flue gas. Since the amount of calcium and magnesium dust cannot be recorded separately, the amount of calcium and magnesium dust is characterized by recording the total content of dust in the flue gas at the inlet of the activated carbon adsorption tower. The total dust content H=20.78mg / Nm 3 .

[0024] 2) Flue Gas Adsorption Tower Desulfurization: No measures were taken. Sintering flue gas enters the activated carbon adsorption tower for desulfurization. After desulfurization, the purified flue gas is discharged into the atmosphere through a large flue. The activated carbon, which has absorbed SO2, is then sent to the desulfurization tower for desulfurization. The sulfur contents of the activated carbon in the six bins are 2.80wt%, 3.01wt%, 3.34wt%, 1.95wt%, 1.72wt%, and 1.53wt%, respectively.

[0025] 3) Activated carbon analysis: The analysis parameters are as follows: a. The decomposition temperature of the decomposition tower is controlled at 405°C. b. The decomposition time Tmin of the decomposition tower is controlled as follows: T = (420-405) × 1.5 + 180 = 202.5; c. The control principle of desorption temperature W℃ and desorption time Tmin is: on the basis of meeting the flue gas purification requirements, the lower the temperature control within the desorption temperature range, the more conducive to reducing carbon consumption; the shorter the desorption time, the more conducive to reducing carbon consumption; 4) Record the weight of the activated carbon after analysis M=25.18t / h, and send it to a 1.2mm aperture sieve for screening: after screening, record the weight of the activated carbon on the sieve ms=24.65t / h, and send it back to the activated carbon desulfurization tower for recycling; the activated carbon under the sieve is discarded, and its weight mx=0.45t / h is recorded and sent to the waste yard.

[0026] 5) Calculate the activated carbon loss S: The calculation formula is S = (M-ms) / M = (25.18-24.70) / 25.18 = 1.91%.

[0027] Example 4 1) Reduce the amount of sulfate and sulfite needle crystals in the activated carbon of the adsorption tower by using the following methods: Before the flue gas enters the adsorption tower, a water seal system is set up to remove calcium and magnesium dust in the inlet flue gas. Since the amount of calcium and magnesium dust cannot be recorded separately, the amount of calcium and magnesium dust is characterized by recording the total dust content in the flue gas at the inlet of the activated carbon adsorption tower. The total dust content H=19.34mg / Nm 3 .

[0028] 2) Flue Gas Adsorption Tower Desulfurization: No measures were taken. Sintering flue gas enters the activated carbon adsorption tower for desulfurization. After desulfurization, the purified flue gas is discharged into the atmosphere through a large flue. The activated carbon, which has absorbed SO2, is then sent to the desulfurization tower for desulfurization. The sulfur contents of the activated carbon in the six bins were 2.71wt%, 2.95wt%, 3.07wt%, 1.94wt%, 1.81wt%, and 1.59wt%, respectively.

[0029] 3) Activated carbon analysis: The analysis parameters are as follows: a. The decomposition temperature of the decomposition tower is controlled at 389°C. b. The decomposition time Tmin of the decomposition tower is controlled as follows: T=(420-389)×1.5+180=226.5; c. The control principle of desorption temperature W℃ and desorption time Tmin is: on the basis of meeting the flue gas purification requirements, the lower the temperature control within the desorption temperature range, the more conducive to reducing carbon consumption; the shorter the desorption time, the more conducive to reducing carbon consumption; 4) Record the weight of the activated carbon after analysis M = 23.79t / h, and send it to a 1.2mm aperture sieve for screening: after screening, record the weight of the activated carbon on the sieve ms = 23.34t / h, and send it back to the activated carbon desulfurization tower for recycling; the activated carbon under the sieve is discarded, and its weight mx = 0.43t / h is recorded and sent to the waste yard.

[0030] 5) Calculate the activated carbon loss S: The calculation formula is S = (M-ms) / M = (23.79-23.34) / 23.79 = 1.89%.

[0031] Example 5 1) Reduce the amount of sulfate and sulfite needle crystals in the activated carbon of the adsorption tower by using the following methods: The dust removal efficiency of the electrostatic precipitator in front of the adsorption tower inlet is increased to reduce the calcium and magnesium dust in the inlet flue gas. Since the amount of calcium and magnesium dust cannot be recorded separately, the total dust content in the flue gas at the inlet of the activated carbon adsorption tower is recorded to characterize the amount of calcium and magnesium dust. The recorded dust content is H = 30.65 mg / Nm 3 .

[0032] 2) Flue Gas Adsorption Tower Desulfurization: No measures were taken. Sintering flue gas enters the activated carbon adsorption tower for desulfurization. After desulfurization, the purified flue gas is discharged into the atmosphere through a large flue. The activated carbon, which has absorbed SO2, is then sent to the desulfurization tower for desulfurization. The sulfur contents of the activated carbon in the six bins were 2.79wt%, 2.87wt%, 3.25wt%, 2.01wt%, 1.74wt%, and 1.45wt%, respectively.

[0033] 3) Activated carbon analysis: The analysis parameters are as follows: a. The decomposition temperature of the decomposition tower is controlled at 438°C. b. The decomposition time Tmin of the decomposition tower is controlled as follows: T = (420-438) × 1.5 + 180 = 153; c. The control principle of the desorption temperature W°C and desorption time Tmin is: on the basis of meeting the flue gas purification requirements, the lower the temperature control within the desorption temperature range, the more conducive to reducing carbon consumption; the shorter the desorption time, the more conducive to reducing carbon consumption; 4) Record the weight of the activated carbon after analysis M=24.73t / h, and send it to a 1.2mm aperture sieve for screening: after screening, record the weight of the activated carbon on the sieve ms=24.24t / h, and send it back to the activated carbon desulfurization tower for recycling; the activated carbon under the sieve is discarded, and its weight mx=0.49t / h is recorded and sent to the waste yard.

[0034] 5) Calculate the activated carbon loss S: The calculation formula is S = (M-ms) / M = (24.73-24.24) / 24.73 = 1.98%.

[0035] Example 6 1) Reduce the amount of sulfate and sulfite needle crystals in the activated carbon of the adsorption tower. No measures were taken. The dust content H = 39.02 mg / Nm 3 .

[0036] 2) Flue Gas Adsorption Tower Desulfurization: Adjust the activated carbon circulation rate in the adsorption tower. Sintering flue gas enters the activated carbon adsorption tower for desulfurization. After desulfurization, the purified flue gas is discharged into the atmosphere through a large flue. The activated carbon that has adsorbed SO2 gas is sent to the desulfurization tower for desulfurization. The sulfur contents of the activated carbon in the six bins are: 2.42wt%, 2.07wt%, 2.39wt%, 2.05wt%, 1.82wt%, 1.31wt%, and .

[0037] 3) Activated carbon analysis: The analysis parameters are as follows: a. The decomposition temperature of the decomposition tower is controlled at 420°C. b. The analysis time Tmin of the analysis tower is controlled as follows: T = (420-420) × 1.5 + 180 = 180; c. The control principle of the desorption temperature W°C and desorption time Tmin is: on the basis of meeting the flue gas purification requirements, the lower the temperature control within the desorption temperature range, the more conducive to reducing carbon consumption; the shorter the desorption time, the more conducive to reducing carbon consumption; 4) Record the weight of the activated carbon after analysis M=26.82t / h, and send it to a 1.2mm aperture sieve for screening: after screening, record the weight of the activated carbon on the sieve ms=26.31t / h, and send it back to the activated carbon desulfurization tower for recycling; the activated carbon under the sieve is discarded, and its weight mx=0.51t / h is recorded and sent to the waste yard.

[0038] 5) Calculate the activated carbon loss S: The calculation formula is S = (M-ms) / M = (26.82-24.24) / 26.82 = 1.90%.

[0039] Example 7 1) Reduce the amount of sulfate and sulfite needle crystals in the activated carbon of the adsorption tower by using the following methods: The dust removal efficiency of the electrostatic precipitator in front of the adsorption tower inlet was increased and a water seal system was set before the flue gas entered the adsorption tower to reduce the amount of calcium and magnesium dust in the inlet flue gas. Since the amount of calcium and magnesium dust cannot be recorded separately, the amount of calcium and magnesium dust is characterized by recording the total dust content in the flue gas at the inlet of the activated carbon adsorption tower. The recorded dust content is H = 26.17 mg / Nm 3 .

[0040] 2) Flue Gas Adsorption Tower Desulfurization: Adjust the activated carbon circulation rate in the adsorption tower. Sintering flue gas enters the activated carbon adsorption tower for desulfurization. After desulfurization, the purified flue gas is discharged into the atmosphere through a large flue. The activated carbon that has adsorbed SO2 gas is sent to the desulfurization tower for desulfurization. The sulfur contents of the activated carbon in the six bins are: 2.35wt%, 2.18wt%, 2.29wt%, 2.01wt%, 1.93wt%, 1.45wt%, and .

[0041] 3) Activated carbon analysis: The analysis parameters are as follows: a. The decomposition temperature of the decomposition tower is controlled at 392°C. b. The analysis time Tmin of the analysis tower is controlled as follows: T = (420-392) × 1.5 + 180 = 224; c. The control principle of the desorption temperature W°C and desorption time Tmin is: on the basis of meeting the flue gas purification requirements, the lower the temperature control within the desorption temperature range, the more conducive to reducing carbon consumption; the shorter the desorption time, the more conducive to reducing carbon consumption; 4) Record the weight of the activated carbon after analysis M=27.18t / h, and send it to a 1.2mm aperture sieve for screening: after screening, record the weight of the activated carbon on the sieve ms=26.73t / h, and send it back to the activated carbon desulfurization tower for recycling; the activated carbon under the sieve is discarded, and its weight mx=0.45t / h is recorded and sent to the waste yard.

[0042] 5) Calculate the activated carbon loss S: The calculation formula is S = (M-ms) / M = (27.18-26.73) / 27.18 = 1.66%.

Claims

1. A method for reducing carbon consumption in a sintering flue gas activated carbon purification system, characterized by: The sulfur content in the activated carbon coming out of the adsorption tower is controlled to not exceed 2.5wt% of the activated carbon.

2. The method for reducing carbon consumption in a sintering flue gas activated carbon purification system according to claim 1, characterized in that: Control the desorption temperature W°C and desorption time Tmin of the activated carbon in the desorption tower: The decomposition temperature of the decomposition tower is W: 360 ~ 440; The analysis time T of the analysis tower is not less than T0, T0=(420-W)×1.5+180.

3. The method for reducing carbon consumption in a sintering flue gas activated carbon purification system according to claim 1, characterized in that: The content of calcium and magnesium dust in the flue gas at the inlet of the adsorption tower is reduced.

4. The method for reducing carbon consumption in a sintering flue gas activated carbon purification system according to claim 3, characterized in that: The method for reducing the content of calcium and magnesium dust in the flue gas at the inlet of the adsorption tower is to increase the dust removal efficiency of the electrostatic precipitator in front of the inlet of the adsorption tower.

5. The method for reducing carbon consumption in a sintering flue gas activated carbon purification system according to claim 3, characterized in that: The method for reducing the content of calcium and magnesium dust in the flue gas at the inlet of the adsorption tower is to arrange a water seal system before the flue gas enters the adsorption tower to remove the calcium and magnesium dust in the inlet flue gas.

Images