A gas-solid separator in a furnace

Abstract

The embodiment of the present invention provides a gas-solid separator in a furnace, comprising: a clean gas pipe, a gas-solid separation chamber and an ash discharge pipe, the gas-solid separation chamber is composed of an air inlet, an upper cover plate, a straight section and a lower cone section, the air inlet is arranged at the upper part of the gas-solid separation chamber, the clean gas pipe penetrates into the gas-solid separation chamber from the upper cover plate, the ash discharge pipe is connected with the gas-solid separation chamber from the lower cone section, and also comprises: an ejection spray gun, which penetrates into the gas-solid separation chamber through the clean gas pipe. Applying the solution provided by the present invention can reduce the smoke control cost of an enterprise.

Description

Technical Field

[0001] The invention relates to the technical field of gas-solid separation, in particular to a gas-solid separator in a furnace. Background Art

[0002] Multi-tube or cyclone dust collectors are commonly used dry dust collectors or gas-solid separators at home and abroad. They are widely used in smoke control in metallurgy, chemical industry, industrial furnaces, ore and cement industries, with the advantages of low investment and small size.

[0003] However, traditional gas-solid separators are placed outside the furnace, occupying a large space; and the energy consumption and heat loss are increased in the process of returning the separated powder to the furnace, which increases the company's smoke control costs. Summary of the invention

[0004] The embodiment of the present invention provides an in-furnace gas-solid separator to achieve the technical effect of performing gas-solid separation in the furnace.

[0005] One aspect of the implementation of the present invention provides an in-furnace gas-solid separator, including: a clean air pipe, a gas-solid separation chamber and an ash discharge pipe, the gas-solid separation chamber is composed of an air inlet, an upper cover plate, a straight section and a lower cone section, the air inlet is arranged at the upper part of the gas-solid separation chamber, the clean air pipe penetrates into the gas-solid separation chamber from the upper cover plate, the ash discharge pipe is connected with the gas-solid separation chamber from the lower cone section, and also includes: an induced air spray gun, which penetrates into the gas-solid separation chamber through the clean air pipe.

[0006] Optionally, the axes of the clean air pipe, the gas-solid separation chamber, the ash discharge pipe and the injection lance are on the same vertical line.

[0007] Optionally, the air inlets are evenly distributed along the rotation center of the gas-solid separation chamber.

[0008] Optionally, the air inlet part is an air inlet pipe arranged at the upper part of the gas-solid separation chamber.

[0009] Optionally, the air inlet pipe is arranged at the upper part of the straight tube section, and the outer wall of the air inlet pipe is tangent to the outer wall of the straight tube section.

[0010] Optionally, the air inlet duct is arranged on the upper cover plate, and the outer wall of the air inlet duct is tangent to the edge of the upper cover plate.

[0011] Optionally, the angle between the air inlet duct and the horizontal plane is 25°-40°; the air inlet duct is arranged obliquely downward to make each airflow thinner and not affect each other, and all form a good spiral dust reduction movement along the tangential oblique downward, thereby improving the separation efficiency.

[0012] Optionally, the air inlet pipe is an involute spiral pipe or a straight rectangular spiral pipe.

[0013] Optionally, the opening of the air inlet pipe is triangular or elliptical.

[0014] Optionally, the air inlet portion is an air inlet opened at the edge of the upper cover plate.

[0015] The in-furnace gas-solid separator provided in the embodiment of the present invention uses an ejector spray gun to blow air into the ash discharge pipe, so as to suppress the phenomenon that the airflow and dust in the ash discharge pipe rise back due to the pressure difference in the furnace when the gas-solid separator is placed in the furnace; the gas-solid separation is completed in the furnace to reduce the floor space; the energy consumption and heat loss increased by returning the powder to the furnace are saved; and the smoke dust control cost of the enterprise is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a first in-furnace gas-solid separator provided by an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A top view of the gas-solid separator in the middle furnace;

[0019] Figure 3 A schematic structural diagram of a second in-furnace gas-solid separator provided by an embodiment of the present invention;

[0020] Figure 4 A schematic structural diagram of a third in-furnace gas-solid separator provided by an embodiment of the present invention;

[0021] Figure 5 A schematic structural diagram of a fourth in-furnace gas-solid separator provided by an embodiment of the present invention;

[0022] Figure 6 A schematic structural diagram of a fifth in-furnace gas-solid separator provided in an embodiment of the present invention.

[0023] Among them, there are a clean air pipe 1, a gas-solid separation chamber 2, an ash discharge pipe 3, an air inlet part 4, an upper cover plate 5, a straight tube section 6, a lower cone section 7 and an injection spray gun 8. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0025] See also Figure 1 and Figure 2An in-furnace gas-solid separator provided in an embodiment of the present invention comprises: a clean air pipe 1, a gas-solid separation chamber 2 and an ash discharge pipe 3. The gas-solid separation chamber 2 is composed of an upper air inlet 4, an upper cover plate 5, a straight cylinder section 6 and a lower cone section 7. The air inlet 4 is arranged at the upper part of the gas-solid separation chamber 2. The clean air pipe 2 penetrates into the gas-solid separation chamber 2 at the upper cover plate 5. The ash discharge pipe 3 is connected with the gas-solid separation chamber 2 at the lower cone section 7. The in-furnace gas-solid separator also comprises: an induced jet spray gun 8, which penetrates into the gas-solid separation chamber 2 through the clean air pipe 1.

[0026] In practice, the induced injection lance 8 is a straight pipe for injecting gas; the distance between the lower pipe opening of the induced injection lance 8 and the upper pipe opening of the ash discharge pipe 3 is 50-200 mm.

[0027] The induced spray gun 8 can use pressurized clean air; it can also use other harmless gases; it can also carry powder to play the role of adding materials. The induced spray gun 8 can inject the dust that rises back to this place into the ash discharge pipe 3 below it. The pressure difference generated by the induced spray gun 8 and the ash discharge pipe 3 can be used to prevent the airflow and dust in the ash discharge pipe 3 from rising back, thereby improving the separation efficiency.

[0028] In practice, the axes of the clean air pipe 1, the gas-solid separation chamber 2, the ash discharge pipe 3 and the injection lance 8 are on the same vertical line.

[0029] In implementation, the air inlet 4 is evenly distributed along the rotation center of the gas-solid separation chamber 2. Specifically, there can be one or more air inlet 4; in the case of more than one air inlet, each air inlet 4 is evenly distributed along the rotation center of the gas-solid separation chamber 2.

[0030] In implementation, the air inlet portion 4 may be an air inlet pipe disposed at the upper portion of the gas-solid separation chamber 2 .

[0031] In practice, the air inlet pipe is arranged at the upper part of the straight tube section 6 , and the outer wall of the air inlet pipe is tangent to the outer wall of the straight tube section 6 .

[0032] In practice, the air inlet pipe is arranged on the upper cover plate 5, and the outer wall of the air inlet pipe is tangent to the edge of the upper cover plate 5 (such as Figure 3 shown).

[0033] In practice, the angle between the air inlet duct and the horizontal plane is 25°-40°.

[0034] In practice, the air inlet pipe is an involute spiral pipe (such as Figure 1 as shown) or straight rectangular spiral pipe (as shown Figure 4Of course, the present invention can also use pipes of other shapes, as long as it can achieve the input of dust-laden airflow into the gas-solid separation chamber 2. Each air inlet pipe is a section of involute or straight rectangular spiral pipe, and is arranged according to the optimized tangential angle and downward oblique angle, so that each airflow becomes thinner and does not affect each other, and all form a good high-speed spiral dust reduction motion along the tangential oblique downward, thereby improving the separation efficiency.

[0035] In practice, the opening of the air inlet pipe is triangular (such as Figure 5 Of course, the nozzle in the present invention can also be in other shapes, and the present invention does not make specific limitations on this.

[0036] In practice, the air inlet 4 can also be an air inlet opened at the edge of the upper cover plate 5 (such as Figure 6 shown).

[0037] By using the in-furnace gas-solid separator provided by the present invention, the dust-laden airflow in the furnace enters the in-furnace gas-solid separator through the air inlet 4, forming a good high-speed spiral dust reduction motion. Dust is separated from the airflow by relying on centrifugal force, inertial force and gravity, and is discharged into the furnace through the ash discharge pipe 3 under the drive of the induced spray gun 8. Part of the induced gas in the induced spray gun 8 and all the powder also enter the furnace through the ash discharge pipe 3, while a small part of the induced gas rotates and rises together with the clean gas and is discharged out of the furnace through the clean gas pipe 1.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A gas-solid separator in a furnace, comprising: A clean air pipe, a gas-solid separation chamber and an ash discharge pipe, wherein the gas-solid separation chamber is composed of an air inlet, an upper cover plate, a straight section and a lower cone section, wherein the air inlet is arranged at the upper part of the gas-solid separation chamber, the clean air pipe penetrates into the gas-solid separation chamber from the upper cover plate, and the ash discharge pipe is connected with the gas-solid separation chamber from the lower cone section, and is characterized in that it also includes: an induced air spray gun, which penetrates into the gas-solid separation chamber through the clean air pipe; the induced air spray gun is used to blow air into the ash discharge pipe, so as to suppress the phenomenon that the airflow and dust in the ash discharge pipe rise due to the pressure difference in the furnace when the gas-solid separator is placed in the furnace, thereby achieving gas-solid separation in the furnace; The air inlet is evenly distributed along the rotation center of the gas-solid separation chamber; The air inlet portion is an air inlet pipe arranged at the upper part of the gas-solid separation chamber, or the air inlet portion is an air inlet port opened at the edge of the upper cover plate.

2. The gas-solid separator in a furnace according to claim 1, characterized in that: The axes of the clean air pipe, the gas-solid separation chamber, the ash discharge pipe and the injection gun are on the same vertical line.

3. The gas-solid separator in a furnace as claimed in claim 1, characterized in that: The air inlet pipe is arranged at the upper part of the straight tube section, and the outer wall of the air inlet pipe is tangent to the outer wall of the straight tube section.

4. The gas-solid separator in a furnace as claimed in claim 1, characterized in that: The air inlet pipe is arranged on the upper cover plate, and the outer wall of the air inlet pipe is tangent to the edge of the upper cover plate.

5. The gas-solid separator in a furnace as claimed in claim 4, characterized in that: The angle between the air inlet pipe and the horizontal plane is 25°-40°.

6. The gas-solid separator in a furnace as claimed in claim 1, characterized in that: The air inlet pipe is one of an involute spiral pipe and a straight rectangular spiral pipe.

7. The gas-solid separator in a furnace as claimed in claim 1, characterized in that: The pipe opening of the air inlet pipe is a triangle or an ellipse.

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