Industrial tail gas atomizing, cooling, intercepting and purifying device

Abstract

The utility model relates to the technical field of tail gas purification, and particularly discloses an industrial tail gas atomizing, cooling, intercepting and purifying device. The device comprises a fluid pipeline in which tail gas is introduced, and is characterized in that a plurality of uniformly spaced double-fluid spray guns and a plurality of uniformly spaced single-fluid spray guns are sequentially mounted on the fluid pipeline along the tail gas circulation direction, and the tail end of the fluid pipeline is communicated with a gas-liquid separator; the nozzle direction of the double-fluid spray gun is opposite to the tail gas circulation direction, a mixing chamber is arranged on the double-fluid spray gun, and a water inlet pipe and a gas inlet pipe are arranged on the mixing chamber; the fluid pipeline is provided with a flushing water opening located below the double-fluid spray gun, and the flushing water opening is communicated with a primary water supply pipeline. The device is novel in structural design, capable of remarkably reducing water consumption, comprehensive in dust removal coverage, good in dust removal effect, stable in overall operation, remarkable in heat recovery effect, high in tail gas treatment efficiency and suitable for wide popularization and application.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas purification, in particular to an industrial tail gas atomization, cooling, interception and purification device. Background Art

[0002] Among industrial exhaust gases, the exhaust from calcium carbide furnaces in the metallurgical industry and the exhaust from large-particle urea production in the chemical industry need to be cooled and dusted when discharged, and the tar, chlorine- and fluorine-containing acidic gases and large particles therein need to be recovered to prevent air pollution or affect the use of downstream systems.

[0003] The temperature of the above-mentioned industrial exhaust gas is generally below 200°C, and the pressure ranges from slightly negative pressure to tens of kilopascals. Therefore, the conventional treatment method for this exhaust gas is to use a fluid to circulate gas-liquid contact in a washing tower to achieve cooling, dust removal and impurity absorption. The device required for this method requires high power to circulate the liquid, and the system resistance is relatively large, which requires a large energy expenditure to a large extent, and the cooling, dust removal and impurity absorption effects are not significant. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art, the utility model provides an industrial tail gas atomization, cooling, interception and purification device with novel design and high treatment efficiency.

[0005] The utility model is achieved through the following technical solutions:

[0006] An industrial exhaust gas atomization, cooling, interception and purification device includes a fluid pipeline for exhaust gas to pass through, and is characterized in that: a number of evenly spaced dual-fluid spray guns and a number of evenly spaced single-fluid spray guns are installed in sequence along the exhaust gas flow direction on the fluid pipeline, and the end of the fluid pipeline is connected to a gas-liquid separator; the nozzle direction of the dual-fluid spray gun is opposite to the exhaust gas flow direction, the dual-fluid spray gun is provided with a mixing chamber, and the mixing chamber is provided with a water inlet pipe and an air inlet pipe; the fluid pipeline is provided with a flushing water outlet located below the dual-fluid spray gun, and the flushing water outlet is connected to a primary water supply pipeline.

[0007] The utility model directly installs a spray gun in the fluid pipeline for conveying exhaust gas. Aiming at the two requirements of exhaust gas dust removal and impurities and cooling, the above-mentioned spray gun is a dual-fluid spray gun and a single-fluid spray gun used in combination at multiple stages. The dual-fluid spray gun is used to convey atomized fluid into the fluid pipeline, and moisten the particles in the exhaust gas while rapidly cooling it. Then, the exhaust gas is intercepted by water spraying through the single-fluid spray gun. Finally, the purpose of purifying and recovering the particles contained in the exhaust gas is achieved through gas-water separation.

[0008] The better technical solution of the present utility model is:

[0009] The water inlet of the single-fluid spray gun is connected to the primary water supply pipeline through a delivery pipe. The nozzles of two adjacent single-fluid spray guns are directed in opposite directions, so that the wetted exhaust gas is fully covered with water spray in a fixed area, thereby realizing the recovery of wetted particles in the exhaust gas.

[0010] The nozzle centers of the dual-fluid spray gun and the single-fluid spray gun coincide with the center line of the fluid pipeline. The nozzles of the spray guns are placed at the center of the fluid pipeline to achieve full coverage of the fluid pipeline cross section in the spray range, thereby improving the spray effect.

[0011] The dual-fluid spray gun and the single-fluid spray gun are both installed on the top side wall of the fluid pipeline and the ends extend out of the fluid pipeline. The flushing water outlet is opened on the bottom side wall of the fluid pipeline, and the flushing water outlet is located in the middle position of the two adjacent dual-fluid spray guns; the spray gun is installed from above, and the spraying force is increased by the addition of gravity. The flushing water outlet is installed relatively forward of the dual-fluid spray gun, thereby achieving the purpose of collecting spray water from the front end to the back, and at the same time increasing the flow rate of the spray water to the gas-liquid separator, and recovering the particles under the spray with maximum efficiency.

[0012] The dual-fluid spray gun and the single-fluid spray gun are both arranged in sequence, and are specifically set according to the diameter of the fluid pipeline and the exhaust gas flow rate. For conventional exhaust emissions, two dual-fluid spray guns and two single-fluid spray guns can achieve a better cooling and dust removal effect.

[0013] The air inlet pipe on the dual-fluid spray gun is connected to the air pump through the air supply pipe, and the water inlet pipe is connected to the primary water supply pipe through the delivery pipe. The water and air supply of the dual-fluid spray gun are controlled by the air pump and the primary water supply pipe, so that water and gas are mixed in the mixing chamber of the dual-fluid spray gun, and finally the atomized fluid is discharged through the nozzle, so that it has initial contact with the exhaust gas, which can quickly cool down the particles in the exhaust gas and wet it, laying the foundation for subsequent water spray dust removal.

[0014] The top outlet of the gas-liquid separator is vented or connected to other systems through a gas delivery pipe, and the tail gas after cooling and dust removal is directly vented or reused according to process requirements; the bottom outlet of the gas-liquid separator is connected to a circulating water pump through a liquid delivery pipe, and the outlet of the circulating water pump is connected in parallel to the sewage discharge pipe and the return pipe of the gas-liquid separator. The spray liquid recovered at the bottom is circulated in the gas-liquid separator to achieve further dust removal and recovery or discharge.

[0015] The utility model discloses novel structure design, significantly reduces water consumption, has comprehensive dust removal coverage, and has good dust removal effect, solves the problem that the existing cooling dust removal requires long-term gas-liquid contact to achieve the cooling dust removal effect, has stable overall operation, significant heat recovery effect, and high exhaust gas treatment efficiency, and is suitable for wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the working principle of the utility model.

[0019] In the figure, 1 is a fluid pipeline, 2 is a dual-fluid spray gun, 3 is a single-fluid spray gun, 4 is an air-water separator, 5 is a flushing water outlet, 6 is a primary water supply pipeline, 7 is an air supply pipeline, 8 is a circulating water pump, 9 is a sewage discharge pipe, and 10 is a return pipe. DETAILED DESCRIPTION

[0020] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] The utility model is described in detail below with reference to the accompanying drawings: This embodiment includes a fluid pipeline 1 through which exhaust gas passes, and a number of evenly spaced dual-fluid spray guns 2 and a number of evenly spaced single-fluid spray guns 3 are installed in sequence on the fluid pipeline 1 along the exhaust gas circulation direction, and the end of the fluid pipeline 1 is connected to a gas-liquid separator 4; the nozzle direction of the dual-fluid spray gun 2 is opposite to the exhaust gas circulation direction, and the dual-fluid spray gun 2 is provided with a mixing chamber, and the mixing chamber is provided with a water inlet pipe and an air inlet pipe; the fluid pipeline 1 is provided with a flushing water outlet 5 located below the dual-fluid spray gun 2, and the flushing water outlet 5 is connected to a primary water supply pipeline 6.

[0023] As attached Figure 1As shown, the water inlet of the single-fluid spray gun 3 is connected to the primary water supply pipe 6 through a delivery pipe, and the nozzles of two adjacent single-fluid spray guns 3 are in opposite directions; the nozzle centers of the dual-fluid spray gun 2 and the single-fluid spray gun 3 coincide with the center line of the fluid pipe 1; the dual-fluid spray gun 2 and the single-fluid spray gun 3 are both installed on the top side wall of the fluid pipe 1 and the ends extend out of the fluid pipe 1, and the flushing water port 5 is opened on the bottom side wall of the fluid pipe 1, and the flushing water port 5 is located in the middle position of the two adjacent dual-fluid spray guns 2; the dual-fluid spray gun 2 and the single-fluid spray gun 3 are two arranged in sequence.

[0024] In terms of connection, the air inlet pipe on the dual-fluid spray gun 2 is connected to the air pump through the air supply pipe 7, and the water inlet pipe is connected to the primary water supply pipe 6 through the delivery pipe; the top outlet of the gas-liquid separator 4 is vented or connected to other systems through the gas delivery pipe; the bottom outlet of the gas-liquid separator 4 is connected to the circulating water pump 8 through the liquid delivery pipe, and the outlet of the circulating water pump 8 is connected in parallel to the sewage discharge pipe 9 and the return pipe 10 of the gas-liquid separator 4.

[0025] As attached Figure 2 As shown, the exhaust gas to be purified circulates in the fluid pipeline 1. When it passes through the dual-fluid spray gun 2, the air pump delivers air to its mixing chamber through the air delivery pipe 7. The gas is mixed with the primary water delivered by the primary water supply pipe 6 in the mixing chamber to form a spray, and is sprayed out through the nozzle. The spraying direction of the spray is opposite to the flow direction of the exhaust gas, thereby achieving sufficient mixing of the spray and the exhaust gas. The spray quickly cools the exhaust gas and moistens the particles in the exhaust gas.

[0026] The tail gas carrying the wetted particles enters the coverage range of the single-fluid spray gun 3, and the two adjacent nozzles spray water in opposite directions, so that the wetted particles in the tail gas fall to the bottom of the fluid pipe 1 with the water, and the spray water cools the tail gas for a second time; at the same time, the flushing water port 5 at the bottom of the fluid pipe 1 continuously supplies water into the fluid pipe 1, flushing the water released by the dual-fluid spray gun 2 and the single-fluid spray gun 3 forward along the fluid pipe 1, and sending the spray water carrying the particles into the gas-liquid separator 4.

[0027] The gas-liquid separator 4 sprays according to the gas flow rate to further purify the tail gas. The purified tail gas is discharged from its top outlet and directly vented or sent to other systems according to the process production. The recovered spray water at the bottom of the gas-liquid separator 4 is discharged from the bottom outlet. Through the power of the circulating water pump 8, part of it is sent to the return pipe 10 to realize the recycling of the spray water. The other part or non-circulating water is discharged through the sewage discharge pipe 9 for treatment.

[0028] The device of this utility model incorporates cooling and dust removal equipment within fluid conduit 1, eliminating the conventional use of a scrubbing tower. This effectively addresses the issues of existing cooling and dust removal devices that utilize a fluid circulating within the scrubbing tower to achieve cooling and dust removal, resulting in high power consumption and system resistance. Due to the varying production conditions for tail gas cooling and dust removal, the higher the temperature, the greater the savings in circulating water and the reduction in system resistance achieved by this device. Therefore, the above-mentioned specific implementation data is difficult to discuss uniformly.

[0029] Taking the cooling and dust removal of calcium carbide furnace exhaust gas in the metallurgical industry as an example, the circulating water used by the device of the utility model is only 15% of the circulating water used by existing conventional devices, and there is no need to design circulating water cooling facilities. The resistance loss of its purification system is only about 20% of the existing technology.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An industrial tail gas atomization cooling interception and purification device, comprising a fluid pipeline (1) for passing tail gas therethrough, characterized in that: The fluid pipeline (1) is provided with a plurality of evenly spaced dual-fluid spray guns (2) and a plurality of evenly spaced single-fluid spray guns (3) in sequence along the exhaust gas flow direction, and the end of the fluid pipeline (1) is connected to a gas-liquid separator (4); the nozzle direction of the dual-fluid spray gun (2) is opposite to the exhaust gas flow direction, the dual-fluid spray gun (2) is provided with a mixing chamber, and the mixing chamber is provided with a water inlet pipe and an air inlet pipe; the fluid pipeline (1) is provided with a flushing water port (5) located below the dual-fluid spray gun (2), and the flushing water port (5) is connected to a primary water supply pipe (6).

2. The industrial tail gas atomization, cooling, interception and purification device according to claim 1, characterized in that: The water inlet of the single-fluid spray gun (3) is connected to the primary water supply pipeline (6) through a delivery pipe, and the nozzles of two adjacent single-fluid spray guns (3) are directed in opposite directions.

3. The industrial tail gas atomization, cooling, interception and purification device according to claim 1 or 2, characterized in that: The nozzle centers of the dual-fluid spray gun (2) and the single-fluid spray gun (3) coincide with the center line of the fluid pipeline (1).

4. The industrial tail gas atomization, cooling, interception and purification device according to claim 1 or 2, characterized in that: The dual-fluid spray gun (2) and the single-fluid spray gun (3) are both installed on the top side wall of the fluid pipeline (1) and the ends thereof extend out of the fluid pipeline (1); the flushing water port (5) is opened on the bottom side wall of the fluid pipeline (1), and the flushing water port (5) is located in the middle position of the two adjacent dual-fluid spray guns (2).

5. The industrial tail gas atomization, cooling, interception and purification device according to claim 1 or 2, characterized in that: The dual-fluid spray gun (2) and the single-fluid spray gun (3) are both arranged in two in sequence.

6. The industrial tail gas atomization, cooling, interception and purification device according to claim 1, characterized in that: The air inlet pipe on the dual-fluid spray gun (2) is connected to the air pump via an air delivery pipe (7), and the water inlet pipe is connected to the primary water supply pipe (6) via a delivery pipe.

7. The industrial tail gas atomization, cooling, interception and purification device according to claim 1, characterized in that: The top outlet of the gas-liquid separator (4) is vented or connected to other systems through a gas delivery pipe; the bottom outlet of the gas-liquid separator (4) is connected to a circulating water pump (8) through a liquid delivery pipe, and the outlet of the circulating water pump (8) is connected in parallel to a sewage discharge pipe (9) and a return water pipe (10) of the gas-liquid separator (4).

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