Dust, sulfur and nitrate integrated equipment and smoke dust treatment method

Abstract

The invention discloses dust, sulfur and nitrate integrated equipment which comprises a flue gas purification box body, the flue gas inlet pipeline is arranged at the lower half section of the flue gas purification box body, is communicated with the flue gas purification box body and is used for conveying unpurified flue gas into the flue gas purification box body; the flue gas filtering assembly is arranged in the flue gas purifying box body, is positioned above the flue gas inlet pipeline and is used for filtering flue gas; the air bag is arranged on one side of the flue gas purification box body and is used for storing compressed air and providing power for pulse back-blowing ash removal; the smoke outlet pipeline is arranged at the upper half section of the smoke purification box body and is used for discharging the filtered smoke out of the smoke purification box body. The invention has the advantages of low investment, small occupied area, high filtering precision, no secondary pollution, prolonged service life of equipment and reduced maintenance cost and operation cost, and high-temperature burning and fire hazard danger of the traditional filtering medium are eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of soot treatment, and more particularly, to an integrated dust-sulfur-nitrate device and a soot treatment method. Background Art

[0003] Traditional soot treatment processes usually adopt a step-by-step treatment method, that is, first remove dust through a dust removal device, and then use desulfurization and denitration devices respectively to treat sulfur oxides and nitrogen oxides. For example, the common electric bag dust removal technology can remove dust to a certain extent, but has problems such as high energy consumption, large equipment volume, and complex maintenance. The wet desulfurization process, although having a relatively high desulfurization efficiency, will generate a large amount of difficult-to-treat desulfurization wastewater. If these wastewaters are directly discharged without proper treatment, they will cause serious pollution to the water environment. At the same time, the flue gas after wet desulfurization often needs to be dewhitewashed, which increases the equipment investment and operation cost. In terms of denitration, the traditional selective catalytic reduction (SCR) technology requires a relatively high reaction temperature window, has strict requirements on the material and operating conditions of the equipment, and has problems such as ammonia escape, which not only reduces the denitration efficiency but also may cause secondary pollution.

[0004] In addition, traditional filter media, such as cloth bags, have great safety hazards when facing flue gas containing sparks or high temperatures, and are easily burned or even cause fires. Moreover, the service life of cloth bags is short and needs to be replaced frequently, which not only increases the maintenance cost but also affects the continuity of production;

[0005] In summary, traditional soot treatment technologies have problems in terms of equipment investment, operation cost, safety performance, environmental protection effect, and resource utilization. Therefore, those skilled in the art are committed to providing an innovative, efficient, and environmentally friendly soot treatment technology and equipment to solve these problems. Summary of the Invention

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an integrated dust-sulfur-nitrate device and a soot treatment method that can effectively solve the above technical problems.

[0007] To achieve the above object, the present invention provides an integrated dust-sulfur-nitrate device, including a flue gas purification box body;

[0008] An inlet flue pipe, arranged at the lower half of the flue gas purification box body and communicating with the flue gas purification box body, for conveying unpurified flue gas into the flue gas purification box body;

[0009] A flue gas filtration assembly, arranged in the flue gas purification box body and located above the inlet flue pipe, for filtering flue gas;

[0010] An air bag is arranged on one side of the flue gas purification box body and is used for storing compressed air to provide power for pulse backblowing and dust cleaning.

[0011] A smoke outlet pipe is arranged in the upper half of the flue gas purification box body and is used for discharging the filtered flue gas out of the flue gas purification box body.

[0012] Four support feet are arranged at the bottom of the flue gas purification box body, and a box door is arranged at the upper end of the flue gas purification box body.

[0013] Further, an interception component is further included, which is arranged in the flue gas purification box body and is located at the smoke outlet pipe for intercepting filter substances.

[0014] Further, the interception component includes a positioning box body with an opening facing inwards. The smoke outlet pipe is arranged outside the positioning box body. A plurality of flow guiding plates are arranged inside the positioning box body. Adjacent two flow guiding plates are arranged at intervals. Both ends of each flow guiding plate are provided with positioning adjustment screws. Both ends of each positioning adjustment screw respectively rotate through the positioning box body and are positioned by locking nuts. A buffer layer is arranged inside each flow guiding plate. The buffer layer is in an arc shape. Both sides of the buffer layer are respectively connected to the inner wall of the positioning box body through two connecting lugs. A plurality of protruding parts are arranged on the outer wall of the buffer layer.

[0015] Further, the surfaces of the flow guiding plates and the flow guiding plates are polished and coated. Specifically,

[0016] They are polished by a mechanical polishing machine so that the surface roughness of the flow guiding plates and the flow guiding plates reaches Ra0.4 - Ra0.8μm. The coating is a nano-ceramic coating with a self-cleaning function.

[0017] Further, a hopper assembly is further included, which is arranged at the lower end of the flue gas purification box body and is used for collecting the dropped filter substances.

[0018] Further, the hopper assembly includes a hopper body, a vibrating dust cleaning unit, and an air cannon dust cleaning unit. The hopper body is arranged at the lower end of the flue gas purification box body, and its cone angle is designed to be 60° - 70°.

[0019] The vibrating dust cleaning unit is installed on the outer wall of the hopper body. By driving an eccentric block to rotate through a motor, a vibrating force is generated to make the hopper wall vibrate at a high frequency, so as to promote the dust attached to the wall to fall off.

[0020] The air cannon dust cleaning unit includes an air storage tank, a solenoid valve, and a jet nozzle installed on the hopper body. When the solenoid valve is opened, the high-pressure gas in the air storage tank is instantaneously sprayed into the hopper body through the jet nozzle to disperse the agglomerated dust.

[0021] Furthermore, the hopper assembly further includes a material level monitoring unit and an ash discharging unit;

[0022] The material level monitoring unit includes a high material level monitor and a low material level monitor disposed on the hopper body, which are used to monitor the dust accumulation in the hopper in real time. The high material level monitor is located at 3 / 4 of the hopper height. When the dust accumulates to this position, an alarm signal will be triggered. The low material level monitor is located at the bottom of the hopper and is used to determine whether the dust in the hopper has been completely discharged;

[0023] The ash discharging unit includes a double-layer ash discharging valve installed on the hopper body. The upper layer is a pneumatic gate valve, and the lower layer is a rotary air lock valve. The pneumatic gate valve is used to control the on-off between the hopper body and the rotary air lock valve, opens during ash discharging, and closes after ash discharging is completed to prevent air leakage. The rotary air lock valve is used to discharge the dust from the hopper.

[0024] Furthermore, it also includes

[0025] A flue gas temperature regulation system, which is used to regulate the high-temperature flue gas to a suitable reaction temperature;

[0026] A waste storage system, which is used to store the waste residue generated during the reaction;

[0027] An electrical control system, which is used to control and monitor the operation of the entire equipment.

[0028] A method for treating soot in an integrated dust, sulfur and nitrate equipment, including: in the preliminary reaction, an absorbent is sprayed into the flue gas containing pollutants: the absorbent reacts with SO3 in the flue gas to generate C a SO4 and H2O,

[0029] The chemical equation is C a (OH)2 + SO3 → C a SO4 + H2OSO2

[0030] The reaction generates C a SO3 and H2O (C a (OH)2 + SO2 → C a SO3 + H2O), and when oxygen is involved, it will further react to generate C a SO4 and H2O (C a (OH)2 + 1 / 2O2 → C a SO4 + H2O);

[0031] Reacts with HCl to generate C a Cl2 and H2O (C a (OH)2 + 2HCI = C a Cl2 + 2H2O;

[0032] Reacts with HF to generate Ca F2 and H2O(C a (OH)2+2HF=C a F2+2H2O, removes acidic components such as sulfur and halides in flue gas;

[0033] Ammonia water participates in the denitrification reaction, 4NO+4NH3+O2→4N2+6H2O, NO+NO2+2NH3→2N2+3H2O, 6NO2+8NH3→7N2+12H2O, converting nitrogen oxides into harmless substances such as nitrogen;

[0034] The flue gas after the preliminary reaction enters the desulfurization tower, where further desulfurization and other reactions occur. The absorption liquid or filler in the tower fully absorbs and reacts with the remaining sulfur oxides and other acidic gases, so that the flue gas is initially purified;

[0035] Dust, sulfur and nitrate integrated equipment treatment: The flue gas after preliminary purification enters the dust, sulfur and nitrate integrated equipment through the second pipeline. The flue gas filtration components inside the equipment use the physical filtration principle to intercept and capture dust particles in the flue gas to achieve smoke and dust separation; desulfurization and denitrification reactions continue to occur in the integrated equipment to further remove residual sulfur oxides and nitrogen oxides to ensure that pollutants in the flue gas meet the standards.

[0036] Furthermore, cleaning and discharge: during the operation of the equipment, the dust attached to the filter components and the inner wall of the equipment is collected into the ash hopper through vibration cleaning and air cannon cleaning, and discharged through the ash discharge unit; the clean flue gas that meets the treatment standards is discharged from the equipment; the clean flue gas that meets the standards after being treated by the dust, sulfur and nitrogen integrated equipment is transported to the chimney through induced draft fans and other equipment, and finally discharged into the atmosphere.

[0037] The beneficial effects of the present invention are:

[0038] 1. The "three-in-one" flue gas purification equipment integrates desulfurization, denitrification and dust removal functions. Compared with the traditional step-by-step treatment of multiple independent equipment, it greatly reduces the initial equipment investment. At the same time, the overall equipment occupies a small area, which can effectively save enterprise site resources, reduce the cost of equipment purchase and site construction, and improve economic benefits;

[0039] 2. Use inorganic fiber materials as filter media. This material is not easy to burn and is insensitive to sparks. It fundamentally eliminates the risk of traditional filter media (such as cloth bags) being easily burned and causing fires when facing high-temperature smoke or sparks, providing a strong guarantee for the safe and stable operation of industrial production.

[0040] 3. The equipment has a high porosity, low air resistance and high filtration precision. The dust filtration efficiency can reach over 99.99%, and the NOx removal efficiency can reach over 95%. It also has a good filtration effect on pollutants such as particulate matter and dioxins, fully meeting the increasingly strict national air emission standards, helping to improve air quality and reduce environmental pollution.

[0041] 4. The ceramic fiber filter tube is internally loaded with a catalyst, and realizes the integration of dry desulfurization, dust removal and denitrification by virtue of its high porosity. Compared with the wet desulfurization process, this pure dry flue gas purification process has no smoky tail, does not require dew point control treatment, and does not produce desulfurization wastewater, avoiding secondary pollution and conforming to the development concept of green environmental protection.

[0042] 5. The product has stable performance. The composite structure of the ceramic fiber filter tube overcomes the ductility problem of the cloth bag. It not only has a better dust removal effect, but also avoids the hidden danger of bag clogging. The service life can reach 5 - 8 years, much longer than that of traditional filter bags. This greatly reduces the equipment maintenance cost and operation cost, and reduces the operation burden.

[0043] 6. The desulfurizer used in the integrated desulfurization, denitrification and dust removal system of the ceramic filter tube can recycle the sodium sulfate and sodium sulfite waste residues generated after the reaction as raw materials for glass production, truly achieving zero solid waste discharge, forming a closed-loop green and economic treatment mode, and improving the resource utilization rate.

[0044] 7. The entire process flow is in a gaseous state, with extremely little corrosion to the equipment, significantly extending the service life of the equipment, reducing the equipment renewal frequency, and further reducing the comprehensive cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic structural diagram of the integrated dust, sulfur and nitrate equipment of the present invention.

[0046] Figure 2 is Figure 1 a schematic structural diagram without showing the box door in

[0047] Figure 3 a schematic structural diagram of the interception component.

[0048] Figure 4 is a schematic side view structural diagram of several guide plates.

[0049] Figure 5 is a schematic structural diagram of the buffer layer.

[0050] Figure 6 is a schematic structural diagram of a specific embodiment of the soot treatment method 1. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0051] The present invention will be further described below with reference to the drawings and embodiments:

[0052] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "setting", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0054] As Figures 1 to 6 shown, an integrated dust, sulfur, and nitrate removal device includes a flue gas purification box body 1;

[0055] An inlet flue gas pipe 6 is arranged in the lower half of the flue gas purification box body 1 and communicates with the flue gas purification box body 1, and is used for conveying unpurified flue gas into the flue gas purification box body 1;

[0056] A flue gas filtration assembly 3 is arranged in the flue gas purification box body 1 and is located above the inlet flue gas pipe 6, and is used for filtering flue gas;

[0057] An air bag 5 is arranged on one side of the flue gas purification box body 1 and is used for storing compressed air to provide power for pulse back blowing and dust cleaning;

[0058] An outlet flue gas pipe 2 is arranged in the lower half of the flue gas purification box body 1 and is used for discharging the filtered flue gas out of the flue gas purification box body 1.

[0059] Four support feet 7 are arranged at the bottom of the flue gas purification box body 1, and a box door 8 is arranged at the upper end of the flue gas purification box body 1.

[0060] It further includes an interception assembly 10, which is arranged in the flue gas purification box body 1 and is located at the outlet flue gas pipe 2, and is used for intercepting filter substances.

[0061] The interception component 10 includes a positioning box body 11 with an inward opening. The smoke outlet pipe 2 is arranged outside the positioning box body 11. A plurality of flow guide plates 12 are arranged inside the positioning box body 11. Two adjacent flow guide plates 12 are arranged at intervals. Positioning adjustment screws 13 are arranged at both ends of each flow guide plate 12. Both ends of each positioning adjustment screw 13 respectively pass through the positioning box body 11 rotatably and are positioned by locking nuts. A buffer layer 15 is arranged inside each flow guide plate 12. The buffer layer 15 is arc-shaped. Both sides of the buffer layer 15 are connected to the inner wall of the positioning box body 11 through two connecting lugs 16 respectively. A plurality of protruding parts are arranged on the outer wall of the buffer layer 15.

[0062] The surfaces of the flow guide plates 12 and the flow guide plates 12 are polished and coated. Specifically,

[0063] They are polished by a mechanical polishing machine so that the surface roughness of the flow guide plates 12 and the flow guide plates 12 reaches Ra0.4 - Ra0.8μm to reduce the friction force when the flue gas flows. The coating is a nano-ceramic coating with a self-cleaning function. This coating can not only further reduce the surface friction coefficient, but also effectively prevent the attachment of dust and corrosive substances, improving the cleanliness and service life of the baffle.

[0064] It further includes a hopper assembly 17 arranged at the lower end of the flue gas purification box body 1. The hopper assembly 17 is used for collecting the dropped filter substances.

[0065] The hopper assembly 17 includes a hopper body 18, a vibrating dust cleaning unit, and an air cannon dust cleaning unit. The hopper body 18 is arranged at the lower end of the flue gas purification box body 1, and its cone angle is designed to be 60° - 70°;

[0066] The vibrating dust cleaning unit is installed on the outer wall of the hopper body 18. The eccentric block is rotated by a motor to generate a vibration force, so that the hopper wall generates high-frequency vibration, prompting the dust attached to the wall to fall off.

[0067] The air cannon dust cleaning unit includes an air storage tank, an electromagnetic valve, and a jet nozzle installed on the hopper body 18. When the electromagnetic valve is opened, the high-pressure gas in the air storage tank is instantaneously sprayed into the hopper body 18 through the jet nozzle, generating a powerful impact force to disperse the agglomerated dust.

[0068] The hopper assembly 17 further includes a material level monitoring unit and a dust discharging unit;

[0069] The material level monitoring unit includes a high material level monitor and a low material level monitor installed on the hopper body 18, which are used to monitor the dust accumulation in the hopper in real time. The high material level monitor is located at 3 / 4 of the hopper height. When the dust accumulates to this position, an alarm signal will be triggered to remind the operator to perform ash discharge operation in time. The low material level monitor is located at the bottom of the hopper and is used to judge whether the dust in the hopper has been completely discharged.

[0070] The ash discharge unit includes a double-layer ash discharge valve installed on the hopper body 18. The upper layer is a pneumatic slide gate valve, and the lower layer is a rotary valve. The pneumatic slide gate valve is used to control the on-off between the hopper body 18 and the rotary valve, opens during ash discharge, and closes after ash discharge to prevent air leakage. The rotary valve is used to discharge the dust from the hopper at a uniform speed, and its rotation speed can be adjusted according to the actual dust discharge amount.

[0071] In addition, the present invention also includes a flue gas temperature adjustment system for adjusting the high-temperature flue gas to an appropriate reaction temperature; a waste storage system for storing the waste residue generated during the reaction; and an electrical control system for controlling and monitoring the operation of the entire equipment.

[0072] The method for treating soot in the integrated equipment includes: in the preliminary reaction, absorbents such as C a (OH)2 and ammonia water are sprayed into the first pipeline 90 of the flue gas containing pollutants:

[0073] Reacting with acidic gases: The absorbent reacts with SO3 in the flue gas to generate C a SO4 and H2O,

[0074] The chemical equation is C a (OH)2 + SO3 → C a SO4 + H2O SO2

[0075] Reacting to generate C a SO3 and H2O (C a (OH)2 + SO2 → C a SO3 + H2O), and will further react to generate C a SO4 and H2O (C a (OH)2 + 1 / 2O2 → C a SO4 + H2O) when oxygen is involved;

[0076] Reacting with HCl to generate C a Cl2 and H2O (C a (OH)2 + 2HCl = C a Cl2 + 2H2O;

[0077] Reacting with HF to generate C a F2 and H2O (Ca (OH)2 + 2HF = C a F2 + 2H2O to remove acidic components such as sulfur and halides in the flue gas;

[0078] Ammonia water participates in the denitrification reaction: 4NO + 4NH3 + O2 → 4N2 + 6H2O, NO + NO2 + 2NH3 → 2N2 + 3H2O, 6NO2 + 8NH3 → 7N2 + 12H2O, converting nitrogen oxides into harmless substances such as nitrogen;

[0079] The process flow in the introduction of SCR denitrification technology (the flue gas is led out after the upper economizer and enters the denitrification device, and then enters the lower economizer after passing through the reactor), key technologies (ammonia injection system, flow field simulation, reactor design, DCS control system, catalyst selection, ammonia-nitrogen equivalent ratio), catalyst-related content (comparison of characteristics of different types of catalysts, factors to be considered in selection, detailed parameters of the medium-high temperature honeycomb catalyst selected for this project), as well as the overall layout principle and scheme of the denitrification system, technical requirements, process system and equipment and parameters (ammonia water storage system, transportation system, injection system, distribution system, reactor and catalyst design parameters, denitrification performance guarantee table), etc.

[0080] The flue gas after the previous reaction enters the desulfurization tower 91, and further desulfurization and other reactions occur in the desulfurization tower 91. Using the absorption liquid or packing in the tower, the remaining acidic gases such as sulfur oxides are fully absorbed and reacted, further reducing the sulfur content in the flue gas and preliminarily purifying the flue gas;

[0081] Understanding the principle of the desulfurization reaction is the basis for optimizing the desulfurization effect. The detailed reaction principle of the sodium alkali wet desulfurization process, that is, the step-by-step reaction of NaOH solution absorbing SO2

[0082] (2NaOH + SO2 → Na2SO3 + H2O, Na2SO3 + SO2 + H2O → 2NaHSO3, the total reaction is NaOH + SO2 → NaHSO3);

[0083] The specific transformation of the SO2 absorption system includes: transformation of the spray system: recalculating the spray volume, increasing the circulation pump, adding spray layers at the top of the No. 2 desulfurization tower, using large-flow low-lift corrosion-resistant and wear-resistant pumps, and ensuring the spray coverage rate; the structure of the swirl-type high-efficiency dust and mist eliminator: water retaining ring, dust collection net, flushing nozzle, swirl plate, cylinder wall, flushing water pipe, rugby structure, technical principle (agglomeration, separation, capture to achieve dust and mist removal), technical characteristics (high dust removal efficiency, elimination of gypsum rain, low operating resistance) and advantages (low initial investment, low operating cost); as well as the relevant technical parameters and equipment information in the main design data sheet and supply list of the desulfurization system.

[0084] Treatment by integrated dust, sulfur and nitrate equipment: The flue gas after preliminary purification enters the integrated dust, sulfur and nitrate equipment through the second pipeline 92. Inside the integrated dust, sulfur and nitrate equipment, the flue gas passes through the ceramic fiber filter tubes of the flue gas filtration component 3, and physical filtration principle is used to intercept and capture the dust particles in the flue gas, realizing the separation of soot.

[0085] The transformation plan of the electrostatic precipitator includes the overall plan (replacing the internal components such as the rapping system, cathode wires, anode plates, etc., transforming the air inlet air guiding and distributing system, transforming the high-voltage power supply, inspecting and repairing the cathode and anode frames and the shell), the details of replacing internal components (the specific reasons and methods for replacing the cathode wires, anode plates, and rapping system), and the power supply transformation plan (the reasons, technical introduction, working principle, comparison with the power frequency power supply, performance comparison table and technical parameter table for using three-phase power supply in the first electric field and high-frequency power supply in the second to third electric fields).

[0086] In the integrated equipment, the desulfurization and denitrification reactions continue to further remove the residual sulfur oxides and nitrogen oxides, ensuring that the pollutants in the flue gas meet the standards.

[0087] Ash cleaning and discharging: During the operation of the equipment, the dust attached to the filter component and the inner wall of the equipment is collected into the ash hopper through the methods of rapping ash cleaning and air cannon ash cleaning, and discharged through the ash discharging unit; the treated clean flue gas meets the standards and is discharged from the equipment; the treated clean flue gas that meets the standards after passing through the integrated dust, sulfur and nitrate equipment is transported to the chimney 99 through equipment such as induced draft fans and finally discharged into the atmosphere.

[0088] The present invention also has the following technical features

[0089] 1. The "three-in-one" flue gas purification integrated equipment has less initial equipment investment and occupies less land.

[0090] 2. The inorganic fiber material is not easy to burn and is not sensitive to sparks, eliminating the high-temperature burning and fire hazards of traditional filter media.

[0091] 3. High porosity, small air resistance, and high filtration accuracy: for particulate matter, NOx, and dioxins, among which the dust filtration efficiency can reach more than 99.99%, the NOx removal efficiency can reach more than 95%, with high filtration accuracy, meeting the national air emission standards.

[0092] 4. Due to the high porosity of the ceramic fiber filter tubes, catalysts are loaded inside, and the ceramic fiber filter tubes with catalytic functions can achieve the integration of dry desulfurization, dust removal, and denitrification. The pure dry flue gas purification process has no smoky tail compared with wet desulfurization, does not require dew point depression, has no desulfurization wastewater, and no secondary pollution.

[0093] 5. The product has stable performance, is resistant to acid and alkali corrosion, and has a long service life: The composite structure of the ceramic fiber filter tube avoids the ductility of the cloth bag, resulting in better dust removal effect. At the same time, it avoids the hidden danger of bag clogging. Its service life can reach 5 - 8 years, which is much better than that of the filter bag, reducing the maintenance cost and operation cost.

[0094] 6. The desulfurization agent used in the integrated desulfurization, denitrification and dust removal system of ceramic filter tubes, and the waste residues of sodium sulfate and sodium sulfite produced can be recycled as raw materials for glass production, achieving zero solid waste discharge, which is a closed-loop green and economical treatment method.

[0095] 7. The entire technological process is in a gaseous state, with extremely little corrosion to the equipment. The service life of the equipment is extended.

[0096] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field according to the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. An integrated dust, sulfur, and nitrate removal device, characterized in that: including a flue gas purification box body (1) an inlet flue (6), which is arranged at the lower half of the flue gas purification box body (1) and communicates with the flue gas purification box body (1), and is used for conveying unpurified flue gas into the flue gas purification box body (1); a flue gas filtering assembly (3), which is arranged in the flue gas purification box body (1) and above the inlet flue (6), and is used for filtering flue gas; an air bag (5), which is arranged on one side of the flue gas purification box body (1) and is used for storing compressed air to provide power for pulse backblowing and dust cleaning; an outlet flue (2), which is arranged at the upper half of the flue gas purification box body (1) and is used for exhausting the filtered flue gas out of the flue gas purification box body (1).

2. The integrated dust, sulfur, and nitrate equipment according to claim 1, characterized in that: Four support feet (7) are arranged at the bottom of the flue gas purification box body (1), and a box door (8) is arranged at the upper end of the flue gas purification box body (1).

3. The integrated dust, sulfur, and nitrate removal equipment according to claim 2, characterized in that: It further includes an interception assembly (10), which is arranged in the flue gas purification box body (1) and at the outlet flue (2), and is used for intercepting filter substances.

4. The integrated dust, sulfur, and nitrate equipment according to claim 3, characterized in that: The interception assembly (10) includes a positioning box body (11) with an opening facing inwards. The outlet flue (2) is arranged outside the positioning box body (11). A plurality of flow guiding plates (12) are arranged inside the positioning box body (11). Adjacent two flow guiding plates (12) are arranged at intervals. Both ends of each flow guiding plate (12) are respectively provided with positioning and adjusting screw rods (13). Both ends of each positioning and adjusting screw rod (13) respectively rotate through the positioning box body (11) and are positioned by locking nuts. A buffer layer (15) is arranged inside each flow guiding plate (12). The buffer layer (15) is in an arc shape. Both sides of the buffer layer (15) are respectively connected with the inner wall of the positioning box body (11) through two connecting lugs (16). A plurality of protruding parts are arranged on the outer wall of the buffer layer (15).

5. The integrated dust, sulfur and nitrate equipment according to claim 4, characterized in that: The surfaces of the flow guiding plates (12) and the flow guiding plates (12) are polished and coated. Specifically, they are polished by a mechanical polishing machine to make the surface roughness of the flow guiding plates (12) and the flow guiding plates (12) reach Ra0.4 - Ra0.8μm. The coating is a nano-ceramic coating with a self-cleaning function.

6. The integrated dust, sulfur and nitrate equipment according to claim 5, characterized in that: It further includes an ash hopper assembly (17) arranged at the lower end of the flue gas purification box body (1), and the ash hopper assembly (17) is used for collecting the dropped filter substances.

7. The integrated dust, sulfur and nitrate equipment according to claim 6, characterized in that: The ash hopper assembly (17) includes an ash hopper body (18), a vibrating and dust cleaning unit, and an air cannon dust cleaning unit. The ash hopper body (18) is arranged at the lower end of the flue gas purification box body (1), and its cone angle is designed to be 60° - 70°; The vibrating and dust cleaning unit is installed on the outer side wall of the ash hopper body (18), and generates a vibrating force by driving an eccentric block to rotate by a motor, so that the ash hopper wall generates high-frequency vibration, prompting the dust attached to the wall to fall off. The air cannon dust cleaning unit includes an air storage tank, a solenoid valve and a jet nozzle installed on the ash hopper body (18). When the solenoid valve is opened, the high-pressure gas in the air storage tank is instantaneously sprayed into the ash hopper body (18) through the jet nozzle to disperse the agglomerated dust.

8. The integrated dust, sulfur, and nitrate removal equipment according to claim 7, characterized in that: The ash hopper assembly (17) further includes a material level monitoring unit and an ash discharging unit; The material level monitoring unit includes a high material level monitor and a low material level monitor disposed on the ash hopper body (18) for real-time monitoring of the dust accumulation in the ash hopper. The high material level monitor is located at 3 / 4 of the height of the ash hopper. When the dust accumulates to this position, an alarm signal will be triggered. The low material level monitor is located at the bottom of the ash hopper for judging whether the dust in the ash hopper has been completely discharged; The ash discharging unit includes a double-layer ash discharging valve installed on the ash hopper body (18). The upper layer is a pneumatic slide gate valve, and the lower layer is a rotary valve. The pneumatic slide gate valve is used to control the on-off between the ash hopper body (18) and the rotary valve, opens during ash discharging, and closes after ash discharging is completed to prevent air leakage. The rotary valve is used to discharge the dust from the ash hopper.

9. The integrated dust, sulfur and nitrate equipment according to claim 8, characterized in that: It further includes a flue gas temperature regulating system for regulating the high-temperature flue gas to a suitable reaction temperature; a waste storage system for storing the waste residue generated during the reaction; an electrical control system for controlling and monitoring the operation of the entire equipment.

10. A method for treating soot in an integrated dust, sulfur, and nitrate equipment, characterized in that, It includes: After the flue gas temperature is adjusted to 400 °C by the flue gas temperature regulation system, an absorbent is injected into the first flue gas pipe (90) containing pollutants during the early reaction: the absorbent reacts with SO3 in the flue gas to generate C a SO4 and H2O, The chemical equation is C a (OH)2 + SO3 → C a SO4 + H2OSO2 Reaction generates C a SO3 and H2O (Ca(OH)2 + SO2 → C a SO3 + H2O), and further reacts to generate C when oxygen is involved a SO4 and H2O (C a (OH)2 + 1 / 2O2 → C a SO4 + H2O); React with HCl to form C a Cl2 and H2O (C a (OH)2 + 2HCl = C a Cl2 + 2H2O; React with HF to produce C a F2 and H2O (C a (OH)2 + 2HF = C a F2 + 2H2O, to remove acidic components such as sulfur and halides in the flue gas; Ammonia participates in the denitrification reaction, 4NO + 4NH3 + O2 → 4N2 + 6H2O, NO + NO2 + 2NH3 → 2N2 + 3H2O, 6NO2 + 8NH3 → 7N2 + 12H2O, converting nitrogen oxides into harmless substances such as nitrogen; The flue gas after the previous reaction enters the desulfurization tower (91), and further desulfurization and other reactions occur in the desulfurization tower (91). Using the absorbent or packing in the desulfurization tower (91), the remaining sulfur oxide acidic gas is fully absorbed and reacted to preliminarily purify the flue gas; Treatment by the dust-sulfur-nitrogen integrated equipment: The preliminarily purified flue gas enters the dust-sulfur-nitrogen integrated equipment through the second pipeline (92). Inside the equipment, through the flue gas filtration component (3), the dust particles in the flue gas are intercepted and captured using the physical filtration principle to achieve dust separation; In the integrated equipment, the desulfurization and denitrification reactions continue to further remove the remaining sulfur oxides and nitrogen oxides to ensure that the pollutants in the flue gas meet the standards; Ash cleaning and discharging: During the operation of the equipment, the dust attached to the filtration component and the inner wall of the equipment is collected into the ash hopper by means of vibration ash cleaning and air cannon ash cleaning, and discharged through the ash discharging unit; The treated clean flue gas meets the standards and is discharged from the equipment; The treated clean flue gas that meets the standards after passing through the dust-sulfur-nitrogen integrated equipment is transported to the chimney (99) through equipment such as induced draft fans and finally discharged into the atmosphere.

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