Acid gas burner

Abstract

The utility model discloses an acid gas burner which comprises a cylindrical body shell, a combustion chamber built by refractory bricks is arranged on the upper portion of an inner cavity of the body shell, an air inlet communicated with the inner cavity is welded to the side face of the body shell, and an ignition rod inserted into the combustion chamber is installed on the side face of the body shell. An axially-penetrating outer pipe is fixedly mounted at the tail of the body shell, a concentric inner pipe is fixedly mounted at the tail of the outer pipe, a gas spray gun is inserted into the inner pipe upwards from the tail, a concentric rotational flow nozzle is fixedly mounted at the top end of the outer pipe and comprises a cylindrical base, each rotational flow blade is provided with an exhaust hole extending to the base from the top, and the exhaust holes are communicated with the base. The upper end of the inner pipe is located in the middle of the swirl nozzle, a taper hole is formed in the bottom of the combustion chamber, the swirl nozzle is inserted into the taper hole, and an acid gas inlet is welded to the side face of the tail of the outer pipe. According to the burner, stable flame is formed at the nozzle, acid gas is better and efficiently treated, and the problems that mixing is not good and tempering is prone to occurring are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to burner technical field, concretely is a kind of acid gas burner. BACKGROUND

[0002] With the development of large-scale chemical industry, raw material diversification, the gas to be treated is more and more complex. Among them, acid gas burner is often used in the process of sulfur recovery related chemical production. In the sulfur recovery process, the sulfur contained in the acid gas is oxidized to sulfur dioxide by high-temperature incineration. This process is an under-oxygen reaction process to ensure that the incomplete combustion of acid gas generates products that are further oxidized to sulfur trioxide in the subsequent section to produce finished sulfuric acid, realizing the recovery of sulfur in waste gas. In this process, the acid gas combustion reaction is relatively slow, and the acid gas combustion generally adopts premixing structure to obtain high flame intensity and short, which is more conducive to the reaction of acid gas. For example, patent No. CN218846158U discloses a new low-pressure acid gas burner and its application device. The cooling protection of various gas guns is not damaged by high temperature, and the flame is pushed out of the burner into the incinerator, so as to avoid the burning of the burner, and oxygen is provided to ensure sufficient combustion. However, this burner is prone to backfire and head burning at low load due to the premixing characteristics. SUMMARY

[0003] The utility model aims to provide an acid gas burner to solve the problems raised in the background art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an acid gas burner, comprising a cylindrical body shell, a combustion chamber made of refractory bricks is arranged on the upper part of the inner cavity of the body shell, the combustion chamber is a cylindrical cavity, an air inlet is welded on the side of the body shell and communicates with the inner cavity, an ignition rod is installed on the side of the body shell and inserted into the combustion chamber, an outer tube is fixedly installed at the tail of the body shell and axially penetrates, an inner tube is fixedly installed at the tail of the outer tube and concentrically, a gas lance is inserted into the inner tube from the tail, a swirl nozzle is fixedly installed at the top end of the outer tube and concentrically, the swirl nozzle comprises a cylindrical base, a plurality of swirl vanes are uniformly arranged on the circumference of the base, each swirl vane is provided with an exhaust hole extending from the top to the base, the upper end of the inner tube is located at the middle part of the swirl nozzle, the bottom of the combustion chamber is provided with a tapered hole with a small upper end and a large lower end, the swirl nozzle is inserted into the tapered hole, and an acid gas inlet is welded on the side of the tail of the outer tube.

[0005] Preferably, a concentric air distribution duct is fixedly installed in the inner cavity of the body shell, and a plurality of circular holes are distributed on the circumferential surface of the air distribution duct, and the diameter of the air distribution duct is greater than that of the lower end of the tapered hole.

[0006] Preferably, the side of the combustion chamber is circumferentially provided with a plurality of upwardly inclined flame detectors.

[0007] Preferably, the included angle A between the conical surface of the conical hole and the axis is 25-40°, and the rotational flow angle of the rotational flow nozzle 10 is 23-30°.

[0008] Compared with the prior art, the utility model has the beneficial effects that: the air and the acid gas are intensively mixed under the action of the rotational flow nozzle at the nozzle, so that the burner forms a stable flame at the nozzle, the acid gas is better and more efficiently treated, and the problem of poor mixing and easy backfire of the acid gas burner is well solved. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 Fig. 2 is a side sectional view of the utility model;

[0010] Fig. 2 Fig. 3 is a side view of the utility model;

[0011] Fig. 3 Fig. 4 is a structure diagram of the rotational flow nozzle.

[0012] In the figure: 1, body shell; 2, air inlet; 3, firebrick; 4, combustion chamber; 5, flame detector; 6, air distribution cylinder; 7, outer pipe; 8, acid gas inlet; 9, inner pipe; 10, rotational flow nozzle; 11, exhaust hole; 12, ignition rod; 13, gas lance. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the utility model will be clearly and completely described 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, rather than all the embodiments.

[0014] Please refer to Figs. 1-3The utility model provides a technical scheme: a kind of sour gas combustor, including the cylindrical body shell 1, the inner cavity upper portion of body shell 1 is provided with the combustion chamber 4 built by refractory brick 3, and the combustion chamber 4 is cylindrical cavity, and sour gas is ignited and burned in the combustion chamber 4.The side surface of body shell 1 is welded with air inlet 2 being communicated with inner cavity, and the side surface of body shell 1 is installed with ignition rod 12 being inserted into the combustion chamber 4, and the side surface of combustion chamber 4 is installed with multiple flame detectors 5 along circumference upward, and flame detector 5 is mature product on sale, for detecting the state of combustion.The tail portion of body shell 1 is fixedly installed with the outer tube 7 being axially penetrated, and the tail portion of outer tube 7 is fixedly installed with the concentric inner tube 9, and inner tube 9 is inserted with gas lance 13 upward from tail portion, and gas lance 13 is used as ignition start and low working condition supplement combustion, and the inner cavity of body shell 1 is fixedly installed with the concentric air distribution cylinder 6, and the circumference of air distribution cylinder 6 is distributed with round hole, and the diameter of air distribution cylinder 6 is greater than the diameter of lower end of taper hole, and the air entering is diffused uniformly by air distribution cylinder 6.

[0015] The top end of outer tube 7 is fixedly installed with the concentric cyclone nozzle 10, and cyclone nozzle 10 includes cylindrical base, and multiple cyclone blades are evenly arranged on the base along circumference, and the cyclone angle of cyclone nozzle 10 is 23-30 °, and each cyclone blade is provided with exhaust hole 11 extending from top to base, and the upper end of inner tube 9 is located in the middle of cyclone nozzle 10, and the bottom of combustion chamber 4 is provided with taper hole with upper small and lower large, and the included angle A between the taper surface of taper hole and axis is 25-40 °, and cyclone nozzle 10 is inserted into taper hole, and the tail side surface of outer tube 7 is welded with sour gas inlet 8.Air forms strong turbulence with sour gas ejected from exhaust hole 11 by cyclone blade, and good mixing is realized, and combustion air mixing is realized, and sour gas and air are mixed in combustion chamber 4, and backfire can be well prevented, and safety can be improved.

[0016] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An acid gas burner, comprising a cylindrical body shell (1), wherein a combustion chamber (4) made of refractory bricks (3) is provided in the upper part of the inner cavity of the body shell (1), the combustion chamber (4) being a cylindrical cavity, an air inlet (2) communicating with the inner cavity is welded to the side of the body shell (1), and an ignition rod (12) inserted into the combustion chamber (4) is installed on the side of the body shell (1), characterized in that: An axially penetrating outer tube (7) is fixedly installed at the tail of the outer casing (1). A concentric inner tube (9) is fixedly installed at the tail of the outer tube (7). A gas spray gun (13) is inserted into the inner tube (9) from the tail upward. A concentric swirl nozzle (10) is fixedly installed at the top of the outer tube (7). The swirl nozzle (10) includes a cylindrical base. Multiple swirl blades are evenly arranged along the circumference of the base. Each swirl blade is provided with an exhaust hole (11) extending from the top to the base. The upper end of the inner tube (9) is located in the middle of the swirl nozzle (10). The bottom of the combustion chamber (4) is provided with a conical hole that is smaller at the top and larger at the bottom. The swirl nozzle (10) is inserted into the conical hole. An acid gas inlet (8) is welded to the side of the tail of the outer tube (7).

2. The acid gas burner according to claim 1, characterized in that: The inner cavity of the outer shell (1) of the main body is fixedly installed with a concentric air distribution tube (6). The circumferential surface of the air distribution tube (6) is distributed with circular holes, and the diameter of the air distribution tube (6) is larger than the diameter of the lower end of the conical hole.

3. The acid gas burner according to claim 1, characterized in that: Multiple upward-sloping flame detectors (5) are installed on the side of the combustion chamber (4) along the circumference.

4. An acid gas burner according to claim 1, characterized in that: The angle A between the conical surface of the conical hole and the axis is 25-40°, and the swirl angle of the swirling nozzle (10) is 23-30°.

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