Combined demisting device
By designing a combined defog defog device, using multi-stage defog defog and wet electromotive defog technology, the problem of difficult to reduce acid gas and particulate pollution in the existing technology has been solved, and efficient emission reduction and improvement of environmental protection device operation efficiency has been achieved. Meets environmentally friendly ultra-low emission standards.
Patent Information
- Application Number
- CN202420516155.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-18
AI Technical Summary
The prior art is difficult to effectively reduce the pollution of acid gas (SO2, NOx) and inhalable particulate matter (PM10, PM2.5), and the operation consumption of environmental protection devices is high, which cannot meet the environmental protection ultra-low emission standards.
Design a combined mist defogging device, including tower body, multi-stage mist defogging section and wet electro-mist defogging device, and reduce emission particles step by step through multi-stage water washing layer and filler-type wire mesh defogging device, combined with spraying Device and process water flushing and recycling demister to reduce ammonia discharge and particulate emissions.
It has achieved at least 15 tons of SO2 and 1.3 tons of particulate matter emissions per year, converted SO2 into agricultural fertilizer, reduced solid waste emissions by more than 200 tons, improved the operating efficiency and emission standards of environmentally friendly devices, and reduced operating consumption and costs.
Smart Images
Figure CN222152413U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas treatment, in particular to a combined demisting device. Background Art
[0002] Regional atmospheric environmental problems characterized by acidic gases (SO2, NOx), inhalable particulate matter (PM10), and fine particulate matter (PM2.5) are becoming increasingly prominent.
[0003] It is necessary for the utility model to provide a combined demisting device which can meet the ultra-low emission standards of environmental protection, reduce the emission of pollutants, reduce the operating consumption of environmental protection devices, and improve the comprehensive benefits. Utility Model Content
[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a combined demisting device, which effectively reduces the operating consumption of environmental protection devices through technical upgrading and transformation, and achieves the annual minimum emission reduction of about 15 tons of SO2 and about 1.3 tons of particulate matter. The removed SO2 is converted into ammonium sulfate, an agricultural fertilizer, and the solid waste emission is reduced by more than 200 tons, which has good environmental and social benefits.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] The utility model discloses a combined demisting device, comprising:
[0007] The tower body has a smoke absorption section at the bottom and a wet electric precipitator at the top, and a flue is installed at the top of the wet electric precipitator;
[0008] The middle part of the tower body is provided with a multi-stage demisting section for washing and diluting high-concentration droplets, absorbing escaped ammonia, and gradually reducing emission particles;
[0009] The multi-stage demisting section includes a water washing layer and a demisting layer. The water washing layer absorbs escaped ammonia, and the demisting layer gradually reduces emission particles. The demisting layer includes a first demister and a second demister installed above the first demister.
[0010] Furthermore, the water washing layer is a two-stage water washing layer.
[0011] Furthermore, the first demister is a packing type demister.
[0012] Furthermore, the second demister is a wire mesh demister.
[0013] In the above technical solution, the utility model provides a combined demisting device with the following beneficial effects:
[0014] The combined demisting device designed in the utility model has a tower body equipped with a multifunctional and efficient multi-stage demisting device (multi-stage demisting section) + wet electric demisting technology, and a spray device is configured in the demisting section to use process water to wash and recover the ammonia mist and aerosol captured by the demisting device, thereby reducing the amount of ammonia escape in the system and improving the ammonia utilization rate of the system;
[0015] In the demisting section, the absorption liquid droplets entrained in the flue gas first pass through two-stage water washing layers to remove ammonia mist, wash and dilute the high-concentration droplets, and absorb part of the escaped ammonia. A larger water washing intensity can be used to fully ensure the washing effect and reduce the concentration of gas-liquid entrained droplets. In the second section, a packing-type high-efficiency demister 4 is used to remove droplets ≥ 20μm by collision and adsorption. Secondly, the third section single-layer metal wire mesh demister 5 removes fine droplets and fine particles under the action of collision, condensation and liquid film adsorption. Finally, the flue gas enters the wet electric demister, which ultimately ensures that the particle emission of the entire device is less than 5mg / Nm 3 ;
[0016] The combined demisting device effectively improves the operating efficiency of the environmental protection device of the desulfurization system, improves the environmental emission standards, and reduces operating consumption and costs. After implementation, the minimum annual reduction in particulate matter is about 1.3 tons. The removed SO2 is converted into agricultural fertilizer ammonium sulfate, reducing solid waste emissions by more than 200 tons, which has good environmental and social benefits.
[0017] Through the application of this combined demisting device in the flue gas desulfurization system, the operating efficiency of the environmental protection device is effectively improved and the environmental protection emission standards are improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.
[0019] Figure 1 The utility model discloses a combined demisting device.
[0020] Description of reference numerals:
[0021] 1. Flue gas absorption section; 2. Primary water washing; 3. Secondary water washing; 4. Packing type demister; 5. Metal mesh demister; 6. Wet electric demister. DETAILED DESCRIPTION
[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0023] See also Figure 1 As shown;
[0024] The utility model discloses a combined demisting device, comprising:
[0025] The tower body has a smoke absorption section 1 at the bottom, a wet electric precipitator 6 at the top, and a flue at the top of the wet electric precipitator 6;
[0026] Among them, a multi-stage demisting section is set in the middle of the tower body, which is used to wash and dilute high-concentration droplets, absorb escaped ammonia, and gradually reduce the emission particles;
[0027] The multi-stage demisting section includes a water washing layer and a demisting layer. The water washing layer is a two-stage water washing layer, namely a primary water washing layer 2 and a secondary water washing layer 3. The water washing layer absorbs the escaped ammonia, and the demisting layer gradually reduces the emission particles. The demisting layer includes a first demister and a second demister installed above the first demister. Preferably, the first demister is a packed demister 4, and the second demister is a wire mesh demister 5.
[0028] Specifically, the combined demisting device is designed to reduce the amount of ammonia escaping from the exhaust gas of the desulfurization tower, improve the utilization rate of ammonia, and at the same time to avoid the corrosion of the surrounding equipment by the desulfurization wet flue gas droplets, so as to ensure that the emission index reaches particulate matter ≤ 5mg / Nm 3 The top of the desulfurization tower is designed with a multi-stage demisting section. After the flue gas passes through the absorption section 1 to remove sulfur dioxide, it enters the primary water washing layer 2, the secondary water washing layer 3, the packing type high-efficiency demister 4 and the metal wire mesh demister 5 at the top of the desulfurization tower through the gas lift plate, and the free NH3 and droplets entrained in the flue gas are removed step by step. Finally, the wet electric demister 6 is used to remove smaller droplets. The clean flue gas that meets the emission requirements is discharged through the direct exhaust chimney. Each of the above demisters is equipped with a process water flushing device;
[0029] In the above technical scheme, the utility model provides a combined demisting device with beneficial effects. The combined demisting device tower body is provided with a multifunctional and efficient multi-stage demisting device (multi-stage demisting section) + wet electric demisting technology, and a spray device is configured in the demisting section to use process water to wash and recover the ammonia mist and aerosol captured by the demisting device, thereby reducing the amount of ammonia escape in the system and improving the ammonia utilization rate of the system;
[0030] In the demisting section, the absorption liquid droplets entrained in the flue gas first pass through two-stage water washing layers to remove ammonia mist, wash and dilute the high-concentration droplets, and absorb part of the escaped ammonia. A larger water washing intensity can be used to fully ensure the washing effect and reduce the concentration of gas-liquid entrained droplets. In the second section, a packing-type high-efficiency demister 4 is used to remove droplets ≥ 20μm by collision and adsorption. Secondly, the third section single-layer metal wire mesh demister 5 removes fine droplets and fine particles under the action of collision, condensation and liquid film adsorption. Finally, the flue gas enters the wet electric demister, which ultimately ensures that the particle emission of the entire device is less than 5mg / Nm 3.
[0031] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A combined demisting device, characterized in that: include: The tower body has a smoke absorption section (1) at its bottom end and a wet electric precipitator (6) at its top end, wherein a flue is installed at the top end of the wet electric precipitator (6); The middle part of the tower body is provided with a multi-stage demisting section for washing and diluting high-concentration droplets, absorbing escaped ammonia, and gradually reducing emission particles; The multi-stage demisting section includes a water washing layer and a demisting layer. The water washing layer absorbs escaped ammonia, and the demisting layer gradually reduces emission particles. The demisting layer includes a first demister and a second demister installed above the first demister.
2. A combined demisting device according to claim 1, characterized in that ； The water washing layer is a two-stage water washing layer.
3. A combined demisting device according to claim 1, characterized in that ； The first demister is a packing type demister (4).
4. A combined demisting device according to claim 1, characterized in that ； The second demister is a wire mesh demister (5).