V-cone low-temperature oxidation denitration reactor

Abstract

The utility model discloses a V-cone low-temperature oxidation denitration reactor and relates to the technical field of flue gas treatment. Comprising a shell, a support, an inner wall fixedly arranged on the shell, a V-shaped cone, a top fixedly arranged on the outer wall of the support and a plurality of groups of injection mechanisms, each group of injection mechanisms are arranged on the shell at equal intervals in the circumferential direction, and the cross section of the shell is in a circular ring shape. According to the V-cone low-temperature oxidation denitration reactor, by utilizing the Bernoulli principle and the special V-cone structure design, a denitration agent and flue gas are fully mixed in the reactor to form a fierce turbulent flow area, so that the mixing effect is greatly improved, the length of a reaction area can be shortened, and waste of the denitration agent is avoided; the reactor composed of the shell, the V-shaped cone on the support and the double-fluid atomization spray gun is simple in structure, free of movable parts, capable of avoiding complex daily maintenance and equipment management, easy to build and install, capable of being placed and installed in any mode and low in manufacturing cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flue gas treatment, specifically to V cone low temperature oxidation denitration reactor. BACKGROUND

[0002] Sintering furnace is the core equipment of steel, cement and other industries, and the flue gas temperature of sintering furnace is usually 120-300 DEG C. The sintering flue gas is complex, containing high concentration NOx, SO2, dust and the like, and needs to be denitration by low temperature oxidation.

[0003] At present, the low temperature oxidation denitration of sintering furnace flue gas emission mostly adopts flue direct atomization spraying or uses venturi tower as a reaction device. When using flue spraying, due to the length and shape of the flue and other factors, it will lead to insufficient reaction, resulting in low denitration efficiency and waste of denitration agent. When using venturi tower as a reaction device, the equipment manufacturing and installation are relatively complex, and the cost is high. SUMMARY

[0004] The utility model provides V cone low temperature oxidation denitration reactor, through utilizing bernoulli principle and special V cone body structure design, makes the denitration agent and flue gas in the reactor fully mixes, forms the intense turbulent flow area, greatly improves the mixing effect, can shorten the length of reaction zone, avoids the waste of denitration agent, through the reactor that the V cone body and double fluid atomization spray gun of shell, support are formed, simple structure does not have movable part, avoided the complex routine maintenance and equipment management, easy to build and install, can install in any way, and the cost is low.

[0005] To achieve the above object, the utility model discloses the following technical scheme: V cone low temperature oxidation denitration reactor, comprising:

[0006] Shell;

[0007] Support, fixedly arranged on the inner wall of the shell;

[0008] V cone body, fixedly arranged on the top of the outer wall of the support;

[0009] Injection mechanism, is equipped with multiple groups, and each group of injection mechanism is equidistantly arranged on the shell along the circumferential direction.

[0010] Further, the cross section of the shell is circular.

[0011] Further, each group of injection mechanism comprises double fluid atomization spray gun and flange, and the double fluid atomization spray gun is installed on one side of the outer wall of the shell through the flange.

[0012] Further, one side of the outer wall of the shell is fixedly provided with an access hole.

[0013] Further, the cone angle of the V-cone is 30-90°.

[0014] Further, each of the double-fluid atomizing lances is located above the V-cone.

[0015] The V-cone low-temperature oxidation denitration reactor has the following beneficial effects: the V-cone low-temperature oxidation denitration reactor, by means of Bernoulli principle and special V-cone structure design, makes the denitration agent and flue gas fully mixed in the reactor, forms an intense turbulent flow region, greatly improves the mixing effect, can shorten the length of the reaction zone, and avoids waste of the denitration agent.

[0016] The V-cone low-temperature oxidation denitration reactor, by the reactor composed of the shell, the V-cone on the support and the double-fluid atomizing lances, has simple structure, no moving parts, avoids complex daily maintenance and equipment management, is easy to construct and install, can be placed and installed in any way, and has low cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is a front view of the utility model;

[0018] Fig. 2 is a top view of the utility model;

[0019] Fig. 3 is a mixing effect schematic view of the utility model.

[0020] In the drawing: 1, shell; 2, V-cone; 3, support; 4, double-fluid atomizing lance; 5, flange; 6, manhole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Please refer to Figs. 1-3 The utility model provides a technical scheme: a V-cone low-temperature oxidation denitration reactor, comprising:

[0023] Shell 1;

[0024] Support 3, fixedly arranged on the inner wall of shell 1;

[0025] V-cone 2, fixedly arranged on the top of the outer wall of support 3;

[0026] The spray mechanism is provided with multiple groups, and each group of spray mechanisms is equidistantly arranged on the shell 1 in the circumferential direction.

[0027] In this embodiment: the shell 1 is used to accommodate and guide the flow of flue gas and denitrating agent, the support 3 is used to support the V-cone 2, the V-cone 2 on the support 3 cooperates with the spray mechanism, and the Bernoulli principle can be used to generate a local low-pressure area during the flow of flue gas, thereby attracting the denitrating agent to enter and fully mix with it, and the spray mechanism is used to atomize and spray the denitrating agent into the shell 1 to mix and react with the flue gas.

[0028] Specifically, the cross section of the shell 1 is circular ring-shaped.

[0029] In this embodiment: the shell 1 is in the shape of a circular pipe, which ensures uniform distribution of fluid and reduces flow dead zones.

[0030] Specifically, each group of spray mechanisms includes a double-fluid atomizing spray gun 4 and a flange 5, and the double-fluid atomizing spray gun 4 is installed on one side of the outer wall of the shell 1 through the flange 5.

[0031] In this embodiment: one end of the double-fluid atomizing spray gun 4 is connected to a compressed air pipeline and a denitrating agent supply pipeline, and the double-fluid atomizing spray gun 4 atomizes the denitrating agent into fine particles by compressed air and denitrating agent solution and sprays it into the flue gas.

[0032] Specifically, the outer wall of the shell 1 is fixedly provided with an access manhole 6 on one side.

[0033] In this embodiment: the access manhole 6 facilitates the internal inspection and cleaning of the shell 1.

[0034] Specifically, the cone angle of the V-cone 2 is 30°-90°.

[0035] In this embodiment: the tapered channel formed by the tapered surface of the V-cone 2 and the inner wall of the shell accelerates the flow of flue gas by the Bernoulli effect, so that the denitrating agent and the flue gas are mixed in turbulent flow.

[0036] Specifically, each double-fluid atomizing spray gun 4 is located above the V-cone 2.

[0037] In this embodiment: the double-fluid atomizing spray gun 4 is above the V-cone 2, which can use the Bernoulli principle to mix the denitrating agent with the flue gas.

[0038] In use, the V-cone low-temperature oxidation denitration reactor is installed between the outlet of the sintering kiln exhaust fan and the wet desulfurization and dust removal tower, the double-fluid atomizing spray gun 4 atomizes the denitration agent into small particles by compressed air and denitration agent solution, and sprays the denitration agent into the flue gas, when passing through the V-cone 2, the flue gas is continuously accelerated and reaches the maximum flow rate in the narrow annular area at the bottom of the V-cone 2, according to Bernoulli's principle, at this time, the mixed fluid flow rate is the fastest and the pressure is the smallest, due to the large change of the flow rate and the pressure, the denitration agent and the flue gas are further mixed, the flue gas flows to the bottom of the V-cone 2, the cone suddenly disappears, the space suddenly increases, the flue gas and the denitration agent mixed fluid are sprayed out from the narrow annular area at high speed, a negative pressure area appears at the rear of the V-cone 2, the flue gas continues to flow forward, the flow rate decreases and the pressure increases, under the action of the pressure, the flue gas is sucked into the negative pressure area at the rear of the V-cone 2, collides and finally forms an intense turbulent flow area, so that a very good mixing effect is obtained, and the oxidation reaction is quickly carried out, accompanied by the change of the main fluid, the Karman vortex street effect is also generated behind the multiple columnar supports of the support (3), which intensifies the mixing and oxidation reaction effect of the fluid, wherein the entering angle of the airflow into the annular narrow area is 20°-25°, the wind speed of the annular narrow area between the bottom of the V-cone 2 and the shell 1 is 30-40 m / s, and according to the cavity wind speed, the flue gas is required to stay in the equipment for at least 1.2 seconds, according to the flue gas concentration and the denitration efficiency, the equipment can also be provided with multiple double-fluid atomizing spray guns 4 and V-cone 2 combination units, and the distance between each unit is maintained to be more than three times the diameter.

[0039] The above merely describes a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A V-cone low-temperature oxidation denitration reactor, characterized by, The utility model relates to a double-fluid atomizing spray gun, which comprises a shell (1), a support (3) fixedly arranged on the inner wall of the shell (1), a V-shaped cone (2) fixedly arranged on the top of the outer wall of the support (3), and a plurality of groups of spray mechanisms arranged equidistantly on the shell (1) in the circumferential direction. The cross section of the shell (1) is circular ring-shaped. Each group of the spray mechanisms comprises a double-fluid atomizing spray gun (4) and a flange (5), and the double-fluid atomizing spray gun (4) is installed on one side of the outer wall of the shell (1) through the flange (5). An inspection manhole (6) is fixedly arranged on one side of the outer wall of the shell (1). The cone angle of the V-shaped cone (2) is 30-90 degrees.

2. The V-cone cryogenic oxidative denitration reactor according to claim 1, characterized in that: Each double-fluid atomizing spray gun (4) is located above the V-shaped cone (2).

3. The V-cone cryogenic oxidative denitration reactor according to claim 2, characterized in that: ​ 4. The V-cone cryogenic oxidative denitration reactor according to claim 3, characterized in that: ​ 5. The V-cone cryogenic oxidative denitration reactor according to claim 4, characterized in that: ​ 6. The V-cone cryogenic oxidizing denitration reactor according to claim 5, characterized in that: ​

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