A burner for a fumace using natural gas as fuel and a method of use

Abstract

This invention discloses a fuming furnace burner using natural gas as fuel and its usage method. The fuming furnace burner includes: a combustion air pipe and a natural gas pipe; the combustion air pipe has two open ends, one being a gas outlet and the other a steel rod inlet; a combustion air inlet and a natural gas inlet are provided on the side wall of the combustion air pipe; the head of the natural gas pipe is located inside the combustion air pipe, near the gas outlet; the tail of the natural gas pipe passes through the natural gas inlet and is located outside the natural gas inlet. The fuming furnace burner of this invention can improve the efficiency of fuming smelting, reduce fuming metal loss, and improve the quality of fuming products.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of molten bath smelting equipment, and more particularly to a fuming furnace burner using natural gas as fuel and a use method thereof. BACKGROUND

[0002] The fuming furnace is a metallurgical furnace used for fuming and volatilizing valuable metals in the non-ferrous metallurgy field.

[0003] For many years, the fuming furnace mainly uses pulverized coal with a particle size less than 200 mesh and a moisture content less than 1% as fuel. Coal as fuel has the characteristics of economy, practicality, and easy availability, but its shortcomings are also very prominent. The main problems of coal as fuel are as follows: first, the calorific value is low, the amount used is large, and the smelting efficiency is low; second, a large amount of ash is brought into the metallurgical melt, increasing the difficulty of controlling the composition of the slag, and also increasing the amount of slag, which reduces the metal recovery rate of fuming; third, the ash is brought into the fumed dust product, reducing the purity of the fumed dust product; and fourth, the CO2 emission is high, which is not conducive to reducing greenhouse gas emissions and does not meet the requirements of green development.

[0004] Therefore, it is an urgent problem for those skilled in the art to research and develop a fuming furnace burner using natural gas as fuel and a use method thereof, which can improve the fuming smelting efficiency, reduce the loss of fuming metals, and improve the quality of fuming products. SUMMARY

[0005] Therefore, the present application provides a fuming furnace burner using natural gas as fuel and a use method thereof, which can improve the fuming smelting efficiency, reduce the loss of fuming metals, and improve the quality of fuming products.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A fuming furnace burner using natural gas as fuel, comprising:

[0008] The combustion air pipe has a port-shaped end, and one end is a gas outlet and the other end is a steel drill inlet; a combustion air inlet and a natural gas inlet are formed in the side wall of the combustion air pipe;

[0009] The natural gas pipe has a head portion inside the combustion air pipe, close to the position of the gas outlet; the tail portion of the natural gas pipe penetrates through the natural gas inlet and is located outside the natural gas inlet.

[0010] The beneficial effects of the above-mentioned technical solutions are that, in the present application, natural gas is used as fuel for the fuming furnace. First, the calorific value is high, the amount used is small, and the smelting efficiency is high, which can greatly improve the smelting productivity of the fuming furnace. Moreover, the natural gas is directly sprayed into the outlet end of the burner near the molten pool and mixed with the combustion air for combustion, which is fully combusted and does not backfire, being safe and reliable.

[0011] Preferably, the natural gas inlet is provided with an end cap, and the tail of the natural gas pipe penetrates through the end cap. The end cap can seal the natural gas inlet to prevent natural gas leakage.

[0012] Preferably, the tail of the natural gas pipe is provided with a natural gas check valve, which is located outside the natural gas inlet. The natural gas check valve can prevent backflow of natural gas.

[0013] Preferably, the tail of the natural gas pipe is connected with a purge gas branch pipe, which is located between the natural gas check valve and the end cap. The purge gas branch pipe can blow out the residual natural gas in the natural gas pipe by purge gas every time the combustion is stopped, preventing safety hazards caused by residual natural gas in the pipe.

[0014] Preferably, the purge gas branch pipe is provided with a purge gas check valve. The purge gas check valve can prevent backflow of purge gas.

[0015] Preferably, the steel drill inlet is provided with a check ball valve. The check ball valve can prevent backflow of combustion air, and facilitate the insertion of the steel drill into the burner to clean foreign matter such as slag in the burner, ensuring the smoothness of the burner.

[0016] Preferably, the head of the natural gas pipe is 3-5 mm away from the gas outlet.

[0017] Preferably, the head of the natural gas pipe is in close contact with the inner wall of the combustion air pipe and is connected to the inside of the combustion air pipe; the head of the natural gas pipe is inclined and inclined by 45° to the central axis of the combustion air pipe. The head of the natural gas pipe is inclined, and the natural gas can be diverted to the middle of the combustion air pipe to mix with the combustion air.

[0018] Preferably, the outside of the combustion air pipe is provided with a flange connected to the water jacket of the fuming furnace body.

[0019] A method for using a fuming furnace burner using natural gas as fuel, comprising the following steps:

[0020] 1) Close the purge gas branch pipe, open the natural gas pipe and the combustion air pipe, and then directly inject into the burner outlet end near the molten pool for mixing and combustion after the natural gas and the combustion air are calculated by the DCS system and then metered by the valve station respectively;

[0021] 2) When the combustion is stopped, the purge process is needed, the natural gas pipe and the combustion air pipe are closed, the purge gas branch pipe is opened, and the purge gas is introduced into the natural gas pipe to blow out the residual natural gas in the natural gas pipe.

[0022] When the slagging foreign matter in the combustion air pipe needs to be removed, the steel rod is inserted into the steel rod inlet for cleaning.

[0023] Through the technical scheme, compared with the prior art, the application provides a smoke furnace burner using natural gas as fuel and a use method, which has the beneficial effects that:

[0024] (1) The natural gas as the smoke furnace fuel has high heat value, small dosage and high smelting efficiency, can greatly improve the smelting production rate of the smoke furnace, will not bring ash into the metallurgical melt, the slag composition of the smoke furnace is easy to control, the slag amount is not increased, the metal recovery rate of the smoke is improved, the ash is not brought into the smoke dust product generated by volatilization, the purity of the smoke dust product is high, the quality is good, the CO2 emission of the natural gas combustion is lower than that of coal and other fuels, which is conducive to reducing the greenhouse gas emission and meeting the requirements of green development;

[0025] (2) The natural gas is directly sprayed into the burner outlet end near the molten pool and mixed with the combustion air for combustion, the combustion is sufficient, and the safety is reliable;

[0026] (3) The natural gas head is provided with a natural gas check valve to prevent backflow of the natural gas, and a purge gas branch pipe and a purge gas check valve are arranged to perform purging each time the combustion is stopped, so as to prevent the safety hidden danger caused by the natural gas remaining in the pipe;

[0027] (4) The combustion air pipe is provided with a check ball valve at the front segment, which can prevent backflow of the combustion air, and facilitate the use of the steel rod to pass into the burner to clean the slag and other foreign matters that may enter the burner during use, and ensure the smoothness of the burner. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0029] Figure 1 The internal structure schematic diagram of the steel furnace burner provided by the application is shown.

[0030] In the figure,

[0031] 1-combustion air pipe;

[0032] 11-gas outlet; 12-steel rod inlet; 13-combustion air inlet; 14-natural gas inlet;

[0033] 2 - natural gas pipe; 3 - end cap; 4 - natural gas check valve; 5 - purge gas manifold; 6 - purge gas check valve; 7 - check ball valve; 8 - flange. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] The embodiments of the present application disclose a smoke oven burner using natural gas as fuel, comprising:

[0036] The combustion air pipe 1 is in the shape of a mouth at both ends, and one end is a gas outlet 11 and the other end is a steel drill inlet 12; a combustion air inlet 13 and a natural gas inlet 14 are arranged on the side wall of the combustion air pipe 1;

[0037] The natural gas pipe 2 is arranged inside the combustion air pipe, close to the position of the gas outlet 11; the tail of the natural gas pipe 2 penetrates the natural gas inlet 14 and is located outside the natural gas inlet 14. The tail of the natural gas pipe 2 is connected with a natural gas source.

[0038] In order to further optimize the above technical solution, the end cap 3 is arranged at the natural gas inlet 14, and the tail of the natural gas pipe 2 penetrates the end cap 3. The end cap 3 is in sealing connection with the natural gas inlet 14.

[0039] In order to further optimize the above technical solution, the natural gas check valve 4 is arranged at the tail of the natural gas pipe 2, and the natural gas check valve 4 is located outside the natural gas inlet 14.

[0040] In order to further optimize the above technical solution, the purge gas manifold 5 is connected with the tail of the natural gas pipe 2, and the purge gas manifold 5 is located between the natural gas check valve 4 and the end cap 3. The purge gas manifold 5 is connected with a purge gas source, and the purge gas is selected from nitrogen or compressed air.

[0041] In order to further optimize the above technical solution, the purge gas check valve 6 is arranged on the purge gas manifold 5.

[0042] In order to further optimize the above technical solution, the check ball valve 7 is arranged at the steel drill inlet 12.

[0043] In order to further optimize the above technical solution, the head of the natural gas pipe 2 is 3-5 mm away from the gas outlet 11.

[0044] In order to further optimize the above technical solution, the head of the natural gas pipe 2 is close to the inner wall of the combustion air pipe 1 and connected to the inside of the combustion air pipe 1; the head of the natural gas pipe 2 is inclined and inclined to the central axis of the combustion air pipe 1 by 45°. The outer wall of the natural gas pipe 2 is welded to the inner wall of the combustion air pipe 1.

[0045] In order to further optimize the above technical solution, the combustion air pipe 1 is provided with a flange 8 connected to the water jacket of the flue furnace body. The flange 8 is arranged to facilitate the connection of the burner to the water jacket of the flue furnace body.

[0046] A method for using a flue furnace burner using natural gas as fuel, comprising the following steps:

[0047] 1) Close the purge gas manifold 5, open the natural gas pipe 2 and the combustion air pipe 1, and then directly spray into the burner outlet end near the molten pool for mixing combustion after the natural gas and combustion air are calculated by the DCS system and then metered through the valve station respectively.

[0048] 2) When stopping combustion, blowing treatment is needed, close the natural gas pipe 2 and the combustion air pipe 1, open the purge gas manifold 5, and then blow out the residual natural gas in the natural gas pipe 2 by introducing purge gas into the natural gas pipe 2;

[0049] 3) When it is necessary to remove the slag foreign matter in the combustion air pipe 1, the steel drill is introduced from the steel drill inlet 12 for cleaning.

[0050] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0051] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuming furnace burner using natural gas as fuel, characterized in that, include: Combustion air pipe (1), the combustion air pipe (1) has two openings, one end is a gas outlet (11) and the other end is a steel rod inlet (12); the side wall of the combustion air pipe (1) is provided with a combustion air inlet (13) and a natural gas inlet (14); a check ball valve (7) is provided at the steel rod inlet (12). Natural gas pipe (2), the head of the natural gas pipe (2) is placed inside the combustion air pipe, near the gas outlet (11); the tail of the natural gas pipe (2) passes through the natural gas inlet (14) and is located outside the natural gas inlet (14); the head of the natural gas pipe (2) is in close contact with the inner wall of the combustion air pipe (1) and is connected to the interior of the combustion air pipe (1); the head of the natural gas pipe (2) is inclined and tilted at 45° towards the central axis of the combustion air pipe (1).

2. The fuming furnace burner using natural gas as fuel according to claim 1, characterized in that, An end cap (3) is fastened at the natural gas inlet (14), and the tail of the natural gas pipe (2) passes through the end cap (3).

3. The fuming furnace burner using natural gas as fuel according to claim 2, characterized in that, The natural gas pipe (2) is provided with a natural gas check valve (4) at its tail end, and the natural gas check valve (4) is located outside the natural gas inlet (14).

4. The fuming furnace burner using natural gas as fuel according to claim 3, characterized in that, The tail end of the natural gas pipe (2) is connected to a purging gas branch pipe (5), which is located between the natural gas check valve (4) and the end cap (3).

5. A flue gas furnace burner using natural gas as fuel according to claim 4, characterized in that, The purge gas branch pipe (5) is equipped with a purge gas check valve (6).

6. A flue gas furnace burner using natural gas as fuel according to claim 1, characterized in that, The head of the natural gas pipe (2) is 3mm-5mm away from the gas outlet (11).

7. A flue gas furnace burner using natural gas as fuel according to claim 1, characterized in that, The combustion air pipe (1) is provided with a flange (8) on the outside that is connected to the water jacket of the fuming furnace body.

8. A method of using a flue gas furnace burner as described in any one of claims 1-7, characterized in that, Includes the following steps: 1) Close the purge gas branch pipe (5), open the natural gas pipe (2) and the combustion air pipe (1). The natural gas and combustion air are calculated by the DCS system and then metered by the valve station respectively, and then enter the natural gas pipe (2) and the combustion air pipe (1) respectively, and then directly injected into the vicinity of the molten pool at the burner outlet for mixing and combustion. 2) When combustion stops, a purging process is required. Close the natural gas pipe (2) and the combustion air pipe (1), open the purging gas branch pipe (5), and introduce purging gas into the natural gas pipe (2) to purge out the natural gas remaining in the natural gas pipe (2). 3) When it is necessary to remove slag and foreign matter from the combustion air pipe (1), insert a steel rod through the steel rod inlet (12) for cleaning.

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