Tail gas ignition treatment device for nitriding furnace
By designing a nitriding furnace exhaust gas treatment device with multi-layer baffles and igniters, the exhaust gas was fully combusted and denitrified multiple times, solving the problem of incomplete combustion of exhaust gas, reducing treatment costs and time, and ensuring efficient treatment of exhaust gas.
Patent Information
- Application Number
- CN202423235503.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In existing nitriding furnace exhaust gas treatment devices, the exhaust gas is not fully combusted, which leads to increased processing time and material costs, and fails to effectively remove nitrogen oxides.
A nitriding furnace exhaust gas ignition and treatment device was designed, comprising a purification tower, a flow guide, multi-layer baffles, and an igniter. By separating the combustion chamber and the denitrification chamber, the device achieves uniform mixing and multiple combustion of the exhaust gas and the combustion-supporting gas, and removes nitrogen oxides by combining dinitrate agent and AB agent.
It achieves complete combustion of exhaust gas, significantly reduces nitrogen oxide content, and ensures that exhaust gas meets emission standards through multiple denitrification treatments, thereby reducing treatment costs and time.
Smart Images
Figure CN223855652U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the production tail gas treatment technical field, more specifically, it is especially related to a nitrogenization furnace tail gas pilot ignition treatment device. BACKGROUND
[0002] The nitrogenization furnace tail gas is generally not suitable for direct emission, and after emission, if it meets high temperature or open fire in the air, it is easy to cause fire or explosion, therefore, tail gas treatment measures need to be taken before emission. Common waste gas treatment means includes catalytic combustion, absorption, thermal oxidation and regeneration method. In the waste gas treatment process, if catalytic combustion or thermal oxidation is adopted, the waste gas can be heated and ignited, and is converted into harmless substances such as water and carbon dioxide, and the heat energy can be recycled and utilized, further improving the utilization efficiency of nitrogen oxides.
[0003] Based on the above, in addition to the nitrogenization furnace tail gas, the pilot ignition treatment device generally also needs to pass through the appropriate excess combustion-supporting gas to assist the combustion of the nitrogenization furnace tail gas, and if the mixed gas is not fully combusted, part of the tail gas may be discharged, unless sufficient combustion-supporting gas is passed through and the combustion is maintained for a sufficient time, but this treatment mode undoubtedly greatly improves the time cost and material cost of tail gas treatment. UTILITY MODEL CONTENTS
[0004] In order to solve the above technical problems, the utility model provides a nitrogenization furnace tail gas pilot ignition treatment device to solve the problem that the existing tail gas treatment device is not fully combusted.
[0005] The utility model provides a nitrogenization furnace tail gas pilot ignition treatment device, which is achieved by the following specific technical means:
[0006] A nitrogenization furnace tail gas pilot ignition treatment device, comprising a purification tower, the purification tower is in the shape of a barrel, a conical fairing is arranged above the purification tower, and an exhaust pipe is communicated above the fairing, the inside of the purification tower is provided with six layers of partition plates from bottom to top to form isolated spaces, the partition plates include partition plate A, partition plate B, partition plate C, partition plate D, partition plate E and partition plate F, the space below the partition plate A is a first rectifier chamber, the space between the partition plate A and the partition plate B is a first combustion chamber, the space between the partition plate B and the partition plate C is a second rectifier chamber, the space between the partition plate C and the partition plate D is a second combustion chamber, the space between the partition plate D and the partition plate E is a third rectifier chamber, the space between the partition plate E and the partition plate F is a first denitration chamber, and the space above the partition plate F is a second denitration chamber, the tail gas pipe and the combustion-supporting gas pipe are arranged at the lower position of one side of the purification tower, a flow control valve is arranged on the combustion-supporting gas pipe, and the tail gas pipe and the combustion-supporting gas pipe are connected to the first rectifier chamber.
[0007] Further, four isolation plates are arranged in the first combustion chamber, and the first combustion chamber is divided into four independent spaces by the two-by-two vertical isolation plates, and the intersection positions of the isolation plates are connected with vertical columns, and eight igniters are evenly arranged on the vertical columns, and each independent space of the first combustion chamber is provided with two igniters.
[0008] Further, the air inlet holes are arranged on the isolation plate A, the air outlet holes are arranged on the isolation plate B, and the same number of air inlet holes and air outlet holes are arranged in each independent space of the first combustion chamber, wherein the air inlet holes are close to the igniters, and the air outlet holes are away from the igniters.
[0009] Further, the spiral air pipe is communicated between the isolation plate C and the isolation plate D, a plurality of igniters are arranged at equal distances on the spiral air pipe, and the spiral air pipe is fixedly connected on the side support plates on the front and back sides of the spiral air pipe, and the side support plates are supported between the isolation plate C and the isolation plate D.
[0010] Further, the first denitration chamber contains the dinitrogen agent, the second denitration chamber contains the AB agent, and the vertical total air pipe is communicated with the bottom center of the first denitration chamber and the second denitration chamber, four groups of shunt pipes are connected in parallel on the total air pipe, the shunt pipes are vertically downward and provided with safety covers with downward openings at the ends, the safety cover openings in the first denitration chamber are flush with the liquid level of the dinitrogen agent, and the safety cover openings in the second denitration chamber are flush with the liquid level of the AB agent.
[0011] Further, the side walls of the first denitration chamber and the second denitration chamber are communicated with the water inlet pipe, the water outlet pipe and the overflow pipe, the stop valve is arranged on the water outlet pipe, and the overflow pipe interface is flush with the safety cover opening.
[0012] Further, the exhaust pipe is L-shaped, the exhaust pipe is horizontally arranged at one end, the supporting frame is supported on the horizontal section of the exhaust pipe, and the supporting frame is welded on the flow guide cover.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] 1、The first combustion chamber is arranged, and the independent space is divided in the first combustion chamber, the combustion volume of the mixed gas after the tail gas and the combustion-supporting gas are mixed is reduced, the two kinds of gases are uniformly mixed, the igniter is ignited, and the fullness of the nitrogenization furnace tail gas ignition treatment is promoted.
[0015] 2、The second combustion chamber is arranged, the mixed gas after the first combustion is transmitted in the spiral air pipe, and the mixed gas is ignited once by the igniter after passing a distance, the second combustion is carried out, the nitrogen dioxide and the nitrogen monoxide content in the mixed gas are further reduced, and the gas discharged from the second combustion chamber to the third rectifying chamber does not contain or contains a small amount of nitrogen oxide tail gas.
[0016] 3. The utility model discloses a first denitration chamber and second denitration chamber are set up, and the first denitration chamber is filled with dinitrogen agent, and the dinitrogen agent removes nitrogen dioxide in residual tail gas, and the second denitration chamber is filled with AB agent, and the AB agent removes nitrogen monoxide in residual tail gas, and the first denitration chamber and second denitration chamber are used as further denitration treatment means after primary and secondary pilot treatment, and also are the last guarantee of guaranteeing tail gas treatment effect before gas emission.
[0017] 4. The utility model discloses a safety cover and overflow pipe are set up, and the safety cover opening in the first denitration chamber is flush with dinitrogen agent liquid level, and the safety cover opening in the second denitration chamber is flush with AB agent liquid level, through setting up the safety cover, and the safety cover opening is flush with liquid level, prevents the water flow from sucking back when denitration, and the overflow pipe discharges and recycles the excess dinitrogen agent or AB agent, keeps its liquid level always flush with the safety cover opening, to guarantee that the safety cover normally plays its anti-sucking back function. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is one of the internal structure schematic views after cutting of the utility model.
[0019] Figure 2 It is one of the internal structure schematic views after cutting of the utility model.
[0020] Figure 3 It is the second internal structure schematic view after cutting of the utility model.
[0021] Figure 4 It is the whole structure schematic view of the utility model.
[0022] Figure 5 It is the structure schematic view of the combustion chamber of the utility model.
[0023] In the drawing, the corresponding relationship of component name and drawing number is as follows:
[0024] 1, purification tower;2, fairing;3, baffle A;4, baffle B;5, baffle C;6, baffle D;7, baffle E;8, baffle F;9, first rectifier chamber;10, first combustion chamber;11, second rectifier chamber;12, second combustion chamber;13, first denitration chamber;14, second denitration chamber;15, tail gas pipe;16, combustion gas pipe;17, flow control valve;18, isolation plate;19, stand;20, igniter;21, air inlet hole;22, air outlet hole;23, spiral gas pipe;24, side support plate;25, total gas pipe;26, shunt pipe;27, safety cover;28, water inlet pipe;29, water outlet pipe;30, stop valve;31, dinitrogen agent;32, AB agent;33, overflow pipe;34, exhaust pipe;35, support frame;36, third rectifier chamber. DETAILED DESCRIPTION
[0025] The embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.
[0026] Embodiments:
[0027] As shown in the accompanying Figure 1 to the accompanying Figure 5 As shown:
[0028] The utility model provides a nitrogenization furnace tail gas pilot treatment device, including the purification tower 1, the purification tower 1 is round tub shape, the conical fairing 2 of setting up above the purification tower 1, the exhaust pipe 34 is communicated with above the conical fairing 2, the inside purification tower 1 is by the lower to the upper six layers of baffle and forms the isolated space, and the baffle includes the baffle A 3, baffle B 4, baffle C 5, baffle D 6, baffle E 7 and baffle F 8, the space below baffle A 3 is first rectifier chamber 9, and baffle A 3 and baffle B 4 between for first combustion chamber 10, and baffle B 4 and baffle C 5 between for second rectifier chamber 11, and baffle C 5 and baffle D 6 between for second combustion chamber 12, and baffle D 6 and baffle E 7 between for third rectifier chamber 36, and baffle E 7 and baffle F 8 between for first denitration chamber 13, and the space above baffle F 8 is second denitration chamber 14, the lower position of one side of the purification tower 1 is provided with tail gas pipe 15 and combustion-supporting gas pipe 16, and the flow control valve 17 is set up on combustion-supporting gas pipe 16, and tail gas pipe 15 and combustion-supporting gas pipe 16 are connected into first rectifier chamber 9.
[0029] As shown, four isolation plates 18 are arranged in the first combustion chamber 10, and the first combustion chamber 10 is divided into four independent spaces by the vertical isolation plates 18, and the intersection positions of the isolation plates 18 are connected with vertical columns 19, and eight igniters 20 are arranged in two circles around the vertical columns 19, and there are two igniters 20 in each independent space of the first combustion chamber 10. Figure 5
[0030] As shown, four isolation plates 18 are arranged in the first combustion chamber 10, and the first combustion chamber 10 is divided into four independent spaces by the vertical isolation plates 18, and the intersection positions of the isolation plates 18 are connected with vertical columns 19, and eight igniters 20 are arranged in two circles around the vertical columns 19, and there are two igniters 20 in each independent space of the first combustion chamber 10. Figure 1 As shown, the spiral air pipe 23 is communicated between the partition plate C5 and the partition plate D6, a plurality of igniters 20 are equidistantly arranged on the spiral air pipe 23, the spiral air pipe 23 is fixedly connected to the side support plate 24 on the front and back sides, and the side support plate 24 is supported between the partition plate C5 and the partition plate D6; the primary combustion gas is ignited by the igniter 20 once every distance when being transmitted in the spiral air pipe 23, and the secondary combustion is performed.
[0031] As shown in the figure, Figure 1 As shown, the first denitration chamber 13 contains the dinitrogen agent 31, and the dinitrogen agent 31 removes the nitrogen dioxide; the second denitration chamber 14 contains the AB agent 32, and the AB agent 32 removes the nitrogen monoxide; the first denitration chamber 13 and the second denitration chamber 14 are both communicated with the vertical total air pipe 25 at the bottom center, the total air pipe 25 is parallelly connected with four groups of shunt pipes 26, the shunt pipe 26 is vertically downward at the end and is provided with the downward opening safety cover 27; the opening of the safety cover 27 in the first denitration chamber 13 is flush with the liquid level of the dinitrogen agent 31; the opening of the safety cover 27 in the second denitration chamber 14 is flush with the liquid level of the AB agent 32; by setting the safety cover 27 and the flush opening of the safety cover 27 with the liquid level, the water flow back suction is prevented.
[0032] As shown in the figure, Figure 1 As shown, the first denitration chamber 13 and the second denitration chamber 14 are both communicated with the water inlet pipe 28, the water outlet pipe 29 and the overflow pipe 33 on the side wall, the stop valve 30 is arranged on the water outlet pipe 29, and the overflow pipe 33 is flush with the opening of the safety cover 27; the overflow pipe 33 discharges and recycles the excess dinitrogen agent 31 or AB agent 32, keeps the liquid level always flush with the opening of the safety cover 27, and guarantees the safety cover 27 to normally play the role of preventing back suction.
[0033] As shown in the figure, Figure 1 As shown, the exhaust pipe 34 is L-shaped, the exhaust pipe 34 is horizontally arranged at one end, the supporting frame 35 is supported on the horizontal section of the exhaust pipe 34, and the supporting frame 35 is welded on the flow guide cover 2; the folded exhaust pipe 34 can avoid the rainwater from entering the flow guide cover 2 and the purification tower 1 through the exhaust pipe 34 in rainy days.
[0034] The specific use mode and role of the embodiment are as follows:
[0035] The utility model discloses, through the tail gas pipe 15 is to the purification tower 1 into the tail gas, through the combustion gas pipe 16 is to the purification tower 1 into the proper excess combustion gas, the tail gas and combustion gas are mixed by first rectifier chamber 9 after by the baffle A3 on the air inlet hole 21 even into the each independent space of first combustion chamber 10, is ignited and carries out primary combustion by igniter 20, and mixed gas enters second rectifier chamber 11 by the baffle B4 on the air outlet hole 22, the gas in second rectifier chamber 11 enters second combustion chamber 12 by spiral air pipe 23 lower end, and gas is ignited once by igniter 20 when transmitting in spiral air pipe 23, carries out secondary combustion, and mixed gas enters third rectifier chamber 36 by spiral air pipe 23 upper end, the gas in third rectifier chamber 36 enters first denitration chamber 13 by total gas pipe 25, and then disperses into two nitrogen agent 31 by shunt pipe 26 and safety cover 27, and the nitrogen dioxide gas that is not handled in mixed gas is removed by two nitrogen agent 31, and the gas in first denitration chamber 13 enters second denitration chamber 14 by total gas pipe 25, and then disperses into AB agent 32 by shunt pipe 26 and safety cover 27, and the nitric oxide gas that is not handled in mixed gas is removed by AB agent 32, and the gas after the denitration is discharged by exhaust pipe 34.
[0036] The utility model discloses not detailed, all are the known technology of the person skilled in the art.
Claims
1. A nitrogenization furnace tail gas pilot treatment device, comprising a purification tower (1); the purification tower (1) is in the shape of a barrel, a conical fairing (2) is arranged above the purification tower (1), and an exhaust pipe (34) is communicated above the fairing (2); characterized in that: The purification tower (1) is internally provided with six layers of partitions from bottom to top to form isolated spaces, the partitions include partition A (3), partition B (4), partition C (5), partition D (6), partition E (7) and partition F (8); the space below the partition A (3) is a first rectifying chamber (9), the space between the partition A (3) and the partition B (4) is a first combustion chamber (10), the space between the partition B (4) and the partition C (5) is a second rectifying chamber (11), the space between the partition C (5) and the partition D (6) is a second combustion chamber (12), the space between the partition D (6) and the partition E (7) is a third rectifying chamber (36), the space between the partition E (7) and the partition F (8) is a first denitration chamber (13), and the space above the partition F (8) is a second denitration chamber (14); the purification tower (1) is provided with a tail gas pipe (15) and a combustion-supporting gas pipe (16) at a lower position on one side, a flow control valve (17) is arranged on the combustion-supporting gas pipe (16), and the tail gas pipe (15) and the combustion-supporting gas pipe (16) are connected to the first rectifying chamber (9).
2. A device for tail gas ignition treatment of a nitriding furnace according to claim 1, characterized in that: Four isolation plates (18) are arranged in the first combustion chamber (10), the first combustion chamber (10) is divided into four independent spaces by the isolation plates (18) in pairs and perpendicularly, the intersection positions of the isolation plates (18) are connected with vertical columns (19), eight igniters (20) are arranged in two rings on the vertical columns (19) in a uniform distribution, and each independent space of the first combustion chamber (10) is provided with two igniters (20).
3. A device for tail gas ignition treatment of a nitriding furnace according to claim 1, characterized in that: An air inlet hole (21) is arranged on the partition A (3); an air outlet hole (22) is arranged on the partition B (4); each independent space of the first combustion chamber (10) is provided with the same number of air inlet holes (21) and air outlet holes (22), wherein the air inlet holes (21) are close to the igniters (20), and the air outlet holes (22) are away from the igniters (20).
4. The apparatus for tail gas treatment of a nitriding furnace according to claim 1, wherein: A spiral gas pipe (23) is communicated between the partition C (5) and the partition D (6), a plurality of igniters (20) are arranged on the spiral gas pipe (23) at equal distances, and the spiral gas pipe (23) is fixedly connected to side support plates (24) on the front and back sides of the spiral gas pipe (23), and the side support plates (24) are supported between the partition C (5) and the partition D (6).
5. A device for tail gas ignition treatment of a nitriding furnace according to claim 1, characterized in that: The first denitration chamber (13) contains a di-nitrogen agent (31); the second denitration chamber (14) contains an AB agent (32); a vertical total gas pipe (25) is communicated with the bottom center of the first denitration chamber (13) and the second denitration chamber (14), four groups of branch pipes (26) are connected in parallel on the total gas pipe (25), the branch pipes (26) are vertically downward and provided with safety covers (27) with downward openings at the ends; the opening of the safety cover (27) in the first denitration chamber (13) is flush with the liquid level of the di-nitrogen agent (31); and the opening of the safety cover (27) in the second denitration chamber (14) is flush with the liquid level of the AB agent (32).
6. A device for tail gas ignition treatment of a nitriding furnace according to claim 1, characterized in that: The side walls of the first denitration chamber (13) and the second denitration chamber (14) are communicated with water inlet pipes (28), water outlet pipes (29) and overflow pipes (33), a stop valve (30) is arranged on the water outlet pipe (29), and the interface of the overflow pipe (33) is flush with the opening of the safety cover (27).
7. A device for tail gas ignition treatment of a nitriding furnace according to claim 1, characterized in that: The exhaust pipe (34) is L-shaped, one end of the exhaust pipe (34) is horizontally arranged, a supporting frame (35) is supported on the horizontal section of the exhaust pipe (34), and the supporting frame (35) is welded on the flow guide cover (2).