Dual-fluid automatic regulating constant atomization device for desulfurization and denitrification

Abstract

This utility model relates to an atomizing device, and specifically discloses a dual-fluid automatic adjustable constant atomizing device for desulfurization and denitrification. The dual-fluid automatic adjustable constant atomizing device includes a spray head assembly extending into the desulfurization and denitrification system. Its key feature is that the spray head assembly is installed at the end of the dual-fluid main pipe, which is equipped with a negative pressure device. The inlet of the negative pressure device is connected to a fluid pipe, and the dual-fluid main pipe is connected to a gas source pipe located at the outlet of the negative pressure device. A gas source branch pipe is connected to the gas source pipe, and the end of the gas source branch pipe is connected to the air inlet of the negative pressure device. This utility model has a simple structure and reasonable design. When applied to a desulfurization and denitrification system, it can rapidly cool the flue gas, improve the reaction completeness of the desulfurizing agent or ammonia water, and increase the desulfurization and denitrification efficiency. The overall operating cost of the device is low, making it suitable for widespread application.

Description

Technical Field

[0001] This utility model relates to an atomizing device, and more particularly to a dual-fluid automatic adjustable constant atomizing device for desulfurization and denitrification. Background Technology

[0002] Nitrogen oxides and sulfur dioxide are key pollutants contributing to complex air pollution in my country. Circulating fluidized bed semi-dry desulfurization technology and selective non-catalytic reduction (SNCR) denitrification technology for boilers are among the main desulfurization and denitrification technologies currently employed. The core equipment for these two technologies is the jet atomization device, whose performance directly affects removal efficiency and operating costs. A good atomization effect from the jet atomization device significantly improves the reaction and contact with flue gas, thereby increasing reaction efficiency.

[0003] In existing technologies, when the fluid flow rate in the atomizing device is low, it cannot be fully atomized and cannot be cooled quickly, which easily leads to low desulfurization efficiency. The desulfurizing agent has high humidity due to the high water content in the fluid, which easily adheres to the inner wall of the desulfurization tower, causing the desulfurization tower to "collapse". Similarly, in the denitrification system, it easily leads to a decrease in denitrification efficiency and an increase in ammonia escape, making the ammonia escape index fail to meet the requirements. Furthermore, because the ammonia water cannot be well vaporized into ammonia gas and water vapor, it easily leads to an increase in the dust content index (because water particles are not completely vaporized under the action of high-speed airflow).

[0004] Therefore, improving the structure of the jet atomization device and optimizing the atomization form, while ensuring reaction efficiency, has always been a research direction for technicians. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this utility model provides a dual-fluid automatic adjustable constant atomization device for desulfurization and denitrification with high reaction efficiency and low operating cost.

[0006] This utility model is achieved through the following technical solution:

[0007] A dual-fluid automatic adjustable constant atomization device for desulfurization and denitrification includes a spray head assembly extending into the desulfurization and denitrification system. The spray head assembly is installed at the end of the dual-fluid main pipe, a negative pressure device is installed on the dual-fluid main pipe, a fluid pipe is connected to the inlet of the negative pressure device, an air source pipe located in the outlet direction of the negative pressure device is connected to the dual-fluid main pipe, an air source branch pipe is connected to the air source branch pipe, and the end of the air source branch pipe is connected to the air inlet of the negative pressure device.

[0008] This invention uses a negative pressure device to pressurize and spray the fluid supplied into the fluid pipe, so that the fluid entering the dual-fluid main pipe is initially mixed with the air source entering from the air source pipe. The two then come into full contact in the spray head assembly and are sprayed out from the spray head assembly, thereby producing optimal atomization and droplets, achieving good desulfurization and denitrification effects. When the flow rate of the dual fluid in the dual-fluid main pipe decreases, the flow rate of the dual fluid can be adjusted by regulating the air source branch pipe and the negative pressure device to ensure that the dual fluid is fully atomized from beginning to end.

[0009] The preferred technical solution of this utility model is as follows:

[0010] The dual-fluid main pipe is installed on the desulfurization and denitrification system via a fixed flange, thereby achieving matching and operational stability between the dual-fluid main pipe and the system.

[0011] The gas source branch pipe is equipped with a one-way valve and a solenoid valve to control the opening of the gas source branch pipe and effectively prevent the fluid in the negative pressure device from flowing back into the gas source branch pipe.

[0012] The gas source pipe is equipped with an electric regulating valve A and a pressure transmitter A, and the fluid pipe is equipped with an electric regulating valve B and a pressure transmitter B, so as to control the flow rate and velocity of the medium in the gas source pipe and the fluid pipe and make automatic adjustments according to the actual process requirements.

[0013] A further preferred technical solution is that a needle valve A is installed on the pressure transmitter A, and a needle valve B is installed on the pressure transmitter B, so as to adjust the opening and closing degree of the pressure transmitters.

[0014] The spray head assembly is equipped with a spray regulating screw to control the pressure of the dual fluids sprayed by the spray head assembly, which is coordinated with the flue gas flow rate in the desulfurization and denitrification system to maximize the utilization of the dual fluid medium.

[0015] The negative pressure device includes a negative pressure shell with an internal chamber, and a dual fluid main pipe with a double-layered sleeve structure consisting of an inner fluid pipe and an outer air pipe. The air source branch pipe extends into the chamber of the negative pressure device, and the outlet of the negative pressure device is connected to the inner fluid pipe of the dual fluid main pipe. The air source branch pipe is disconnected from the inner fluid pipe, and a jet negative pressure is generated in the negative pressure shell, which drives the fluid in the fluid pipe to enter the inner fluid pipe together.

[0016] This utility model has a simple structure and reasonable design. By applying a desulfurization and denitrification system, it can rapidly cool the flue gas, improve the reaction completeness of the desulfurizing agent or ammonia water, and improve the desulfurization and denitrification efficiency. The overall operating cost of the device is low, making it suitable for widespread application. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the negative pressure device.

[0020] In the diagram, 1 is an electric regulating valve A, 2 is a pressure transmitter A, 3 is a needle valve A, 4 is an air source pipe, 5 is a spray regulating screw, 6 is a fixed flange, 7 is a spray head assembly, 8 is an air source branch pipe, 9 is a check valve, 10 is a solenoid valve, 11 is an electric regulating valve B, 12 is a pressure transmitter B, 13 is a needle valve B, 14 is a fluid pipe, 15 is a negative pressure device, 16 is a dual fluid main pipe, 17 is a negative pressure housing, and 18 is an internal fluid pipe. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] The present invention will now be described in detail with reference to the accompanying drawings: This embodiment includes a spray head assembly 7 that extends into the desulfurization and denitrification system. The spray head assembly 7 is installed at the end of a dual fluid main pipe 16. A negative pressure device 15 is installed on the dual fluid main pipe 16. A fluid pipe 14 is connected to the inlet of the negative pressure device 15. An air source pipe 4 located in the outlet direction of the negative pressure device 15 is connected to the dual fluid main pipe 16. An air source branch pipe 8 is connected to the air source pipe 4. The end of the air source branch pipe 8 is connected to the air inlet of the negative pressure device 15.

[0024] The dual-fluid main pipe 16 is mounted on the desulfurization and denitrification system via a fixed flange 6; a one-way valve 9 and a solenoid valve 10 are installed on the gas source branch pipe 8; an electric regulating valve A1 and a pressure transmitter A2 are installed on the gas source pipe 4, and an electric regulating valve B11 and a pressure transmitter B12 are installed on the fluid pipe 14; a needle valve A3 is installed on the pressure transmitter A2, and a needle valve B13 is installed on the pressure transmitter B12; a spray regulating screw 5 is installed on the spray head assembly 7; the negative pressure device 15 includes a negative pressure housing 17 with an internal chamber, and the dual-fluid main pipe 16 is a double-layered pipe structure consisting of an inner fluid pipe 18 and an outer air pipe. The gas source branch pipe 8 extends into the chamber of the negative pressure device 15, and the outlet of the negative pressure device 15 is connected to the inner fluid pipe 18 of the dual-fluid main pipe 16.

[0025] The gas source pressure and fluid pressure of this utility model device are 0.3-0.5MPa, and the liquid flow rate is 0-150L / min. The initial adjustment is made at the maximum parameter value, and the pressure difference between the two fluids is not greater than 0.05MPa. At the same time, the gap between the spray head assembly 7 and the spray adjustment screw 5 is adjusted so that the two fluids interact within the spray head assembly 7 to produce optimal atomization and droplets. Based on this, after operation and adjustment, the gas source pressure and flow rate remain basically unchanged. When the liquid flow rate decreases, the pressure also decreases. At this time, the solenoid valve 10 is opened, and the bypass air source branch pipe 8 and the one-way valve 9 are connected, so that the negative pressure device 15 carries the small flow of liquid into the spray head assembly 7 to interact with the air source and make the liquid fully atomized. As the liquid flow rate increases, the pressure also increases until the flow rate reaches the preset initial adjustment value. Then, the solenoid valve 10 is automatically shut off, and the one-way valve 9 is also shut off in the reverse direction due to the high pressure, preventing the liquid from flowing back. The dual fluid reaches the atomization state of the initial adjustment state, so as to achieve full atomization of the dual fluid automatically as the liquid flow rate changes from zero to the maximum (150L / min).

[0026] The operating principle of the negative pressure device 15 of this utility model is as follows: the gas source branch pipe 8 is disconnected from the inner fluid pipe 18, and a jet negative pressure is generated in the negative pressure housing 17, which drives the fluid in the fluid pipe 14 to enter the inner fluid pipe 18 together; if the fluid pressure in the fluid pipe 14 is too high, the negative pressure device automatically shuts off the gas path of the gas source branch pipe 8, so that the fluid in the fluid pipe 14 will directly enter the inner fluid pipe 18, thereby realizing the regulation of liquid flow rate.

[0027] This invention is applicable to semi-dry desulfurization systems, enabling rapid cooling of flue gas and complete reaction of the desulfurizing agent, thereby improving desulfurization efficiency and preventing the desulfurizing agent from adhering to the inner wall of the desulfurization tower. When used in ammonia-based catalytic denitrification systems, it allows for rapid and complete vaporization of ammonia water, achieving a full reaction between ammonia and hydroxides. Furthermore, while improving denitrification efficiency, it effectively reduces ammonia slip to below 0.5%.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A dual-fluid automatic adjustable constant atomization device for desulfurization and denitrification, comprising a spray head assembly (7) extending into the desulfurization and denitrification system, characterized in that: The spray head assembly (7) is installed at the end of the dual fluid main pipe (16). A negative pressure device (15) is installed on the dual fluid main pipe (16). The inlet of the negative pressure device (15) is connected to the fluid pipe (14). The dual fluid main pipe (16) is connected to the air source pipe (4) located in the outlet direction of the negative pressure device (15). An air source branch pipe (8) is connected to the air source pipe (4). The end of the air source branch pipe (8) is connected to the air inlet of the negative pressure device (15).

2. The dual-fluid automatic regulating constant atomization device for desulfurization and denitrification as described in claim 1, characterized in that: The dual-fluid main pipe (16) is mounted on the desulfurization and denitrification system via a fixed flange (6).

3. The dual-fluid automatic regulating constant atomization device for desulfurization and denitrification as described in claim 1, characterized in that: The gas source branch pipe (8) is equipped with a one-way valve (9) and a solenoid valve (10).

4. The dual-fluid automatic regulating constant atomization device for desulfurization and denitrification as described in claim 1, characterized in that: An electric regulating valve A (1) and a pressure transmitter A (2) are installed on the gas source pipe (4), and an electric regulating valve B (11) and a pressure transmitter B (12) are installed on the fluid pipe (14).

5. The dual-fluid automatic regulating constant atomization device for desulfurization and denitrification as described in claim 1, characterized in that: The spray head assembly (7) is equipped with a spray adjustment screw (5).

6. The dual-fluid automatic regulating constant atomization device for desulfurization and denitrification as described in claim 1, characterized in that: The negative pressure device (15) includes a negative pressure shell (17) with an internal chamber, and a dual fluid main pipe (16) is a double-layered pipe structure consisting of an inner fluid pipe (18) and an outer air pipe. The air source branch pipe (8) extends into the chamber of the negative pressure device (15), and the outlet of the negative pressure device (15) is connected to the inner fluid pipe (18) of the dual fluid main pipe (16).

7. The dual-fluid automatic regulating constant atomization device for desulfurization and denitrification as described in claim 4, characterized in that: The pressure transmitter A (2) is equipped with a needle valve A (3), and the pressure transmitter B (12) is equipped with a needle valve B (13).

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