Flue gas purification system for testing combustion performance of building material

Abstract

The utility model belongs to the technical field of flue gas purification, and particularly relates to a flue gas purification system for testing combustion performance of building materials. The flue gas purification system comprises a pulse type filter element dust remover, an activated carbon adsorption box and a spray tower which are sequentially connected through pipelines; an air outlet of the pulse type filter element dust remover is connected to an air inlet of the activated carbon adsorption box; a gas outlet of the activated carbon adsorption box is connected to the bottom of the spray tower, and an organic waste gas absorption liquid spray device is arranged in the spray tower. The flue gas purification system disclosed by the utility model is environment-friendly equipment specially designed for industrial waste gas treatment, can effectively remove harmful substances such as particulate matters, harmful gases (such as sulfur dioxide, nitrogen oxides, carbon monoxide, volatile organic compounds and the like), peculiar smell and the like in waste gas, and ensures that waste gas emission meets the environment-friendly standard.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas purification technology, specifically relating to a flue gas purification system for testing the combustion performance of building materials. Background Technology

[0002] With the rapid development of the construction industry, the combustion performance of building materials has become a crucial factor in public safety and environmental protection. The fumes produced during the combustion of building materials not only pollute the environment but may also release toxic gases, posing a threat to human health. Therefore, the testing and evaluation of the combustion performance of building materials has become particularly important. To ensure the safety and environmental friendliness of building materials, flue gas purification systems are needed to treat the fumes generated during combustion experiments, thereby reducing the impact on the environment and human health.

[0003] The building materials combustion test involved a wide variety of products, and combustion produced a large amount of dust particles, organic waste gas, SO2, NOx, and odorous gases. The waste gas produced by building material combustion has a complex composition and is difficult to treat, containing various VOCs and many components with strong pungent odors that are acidic and corrosive. Most of these components are soluble in certain organic solvents, with a small portion soluble in water. Currently, flue gas purification technologies mainly include physical, chemical, and biological methods. Physical methods, such as filtration and washing, can remove some pollutants, but their treatment effect and capacity are limited. Chemical methods, such as catalytic reduction and adsorption, have good effects but suffer from high costs and strict operating conditions. Biological methods degrade organic pollutants through microorganisms, but require long reaction times and specific environmental conditions.

[0004] Patent CN 118594235 A discloses a flue gas purification system, including a scrubbing tower, a blower, and a gas compression device. The scrubbing tower is used for scrubbing the flue gas. However, this flue gas purification system is mainly used to treat flue gas generated by boiler combustion, removing pollutants such as sulfides and nitrogen oxides through a reaction with a spray liquid. It cannot effectively remove particulate matter and VOCs generated from the combustion of building materials. Utility Model Content

[0005] To address the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a flue gas purification system for testing the combustion performance of building materials. This flue gas purification system is an environmentally friendly device specifically designed for industrial waste gas treatment. It can effectively remove harmful substances from waste gas, such as particulate matter, harmful gases (e.g., sulfur dioxide, nitrogen oxides, carbon monoxide, volatile organic compounds, etc.), and odors, ensuring that waste gas emissions meet environmental standards.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A flue gas purification system for testing the combustion performance of building materials includes a pulse-jet filter dust collector, an activated carbon adsorption box, and a spray tower connected in sequence by pipes; the outlet of the pulse-jet filter dust collector is connected to the inlet of the activated carbon adsorption box; the outlet of the activated carbon adsorption box is connected to the bottom of the spray tower, and an organic waste gas absorption liquid spraying device is installed inside the spray tower.

[0008] Furthermore, the filter element of the pulse-jet filter dust collector is equipped with an electromagnetic pulse automatic blowing device for automatically cleaning the dust accumulated on the surface of the filter element; a dust hopper for collecting dust is provided at the bottom of the pulse-jet filter dust collector.

[0009] The resistance of a pulse-jet filter dust collector increases with the thickness of the dust layer on the filter element surface. The PLC program controls the opening and closing of the pulse valve. At the time set by the pulse controller, the electromagnetic pulse valve opens, and compressed air rushes into the filter element in a short time, causing it to expand and deform, generating vibration. Under the action of the reverse airflow, the dust adhering to the outer surface of the filter element is peeled off and falls into the ash hopper. The detached dust falls into the ash hopper and is discharged through the ash discharge valve. The ash cart is cleaned periodically. The pulse controller automatically blows the filter cartridge every 30-45 seconds, ensuring that the dust on the filter media is promptly dispersed, reducing resistance and allowing for faster airflow.

[0010] Furthermore, the air inlet of the pulse-jet filter dust collector is connected to an air collection buffer box. This is used to control and regulate the airflow and pressure.

[0011] Furthermore, the activated carbon adsorption box uses honeycomb activated carbon, which has the characteristics of large specific surface area, low pore resistance, well-developed micropores, high adsorption capacity, and long service life. The honeycomb activated carbon adsorption method involves contacting the waste gas with porous activated carbon having a large surface area, thereby adsorbing pollutants in the waste gas and achieving a purification effect.

[0012] Furthermore, both the spray tower and the pipes are made of polypropylene (PP). PP material has the characteristics of low density, easy welding and processing, excellent chemical resistance, heat resistance and impact resistance, and is non-toxic and odorless, making it one of the most environmentally friendly engineering plastics.

[0013] The spray tower used in this invention has advantages such as high efficiency, environmental friendliness, and low energy consumption. By employing an organic waste gas absorption liquid with a specific composition, it achieves high purification efficiency, effectively removing harmful substances from the waste gas to meet emission standards. Furthermore, the spray tower is made of environmentally friendly PP material, preventing secondary pollution to the environment, and its low energy consumption also ensures high economic benefits during long-term operation.

[0014] Furthermore, the air outlet at the top of the spray tower is connected to a fan, which is connected to an exhaust duct. A monitoring platform is installed on the exhaust duct. By setting up the fan, the frequency converter can be adjusted to control the required air volume according to production needs, achieving energy-saving effects. The monitoring platform on the exhaust duct allows for real-time monitoring of the quality of the emitted gas.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) The flue gas purification system of this utility model adopts a reasonably set pulse filter dust collector, activated carbon adsorption box and spray tower, which can efficiently remove various harmful substances in the exhaust gas of building materials combustion, and the energy consumption is low during the operation of the equipment.

[0017] (2) The flue gas purification system of this utility model is easy to maintain. Through modular design, it is easy to install, maintain and replace parts, reducing operation and maintenance costs. Furthermore, by further equipping it with an intelligent control system, the processing air volume can be adjusted according to production needs to achieve energy-saving effects. Attached Figure Description

[0018] Figure 1 This is a structural diagram showing the connection relationship of a flue gas purification system used for testing the combustion performance of building materials in Example 1. The numbers in the diagram are explained as follows: 1-Pulse filter dust collector, 2-Activated carbon adsorption box, 3-Spray tower, 4-Gas collection buffer box, 5-Electromagnetic pulse automatic jet cleaning device, 6-Ash hopper, 7-Organic waste gas absorption liquid spraying device, 8-Fan, 9-Exhaust pipe, 10-Detection platform. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0020] Example 1

[0021] A flue gas purification system for testing the combustion performance of building materials, the connection structure diagram of which is shown below. Figure 1As shown, the system includes a pulse-jet filter dust collector 1, an activated carbon adsorption box 2 (using a two-stage activated carbon adsorption box), and a spray tower 3, all connected sequentially by PP pipes. The air inlet of the pulse-jet filter dust collector 1 is connected to a gas collection buffer box 4, used to control and regulate the airflow and pressure. The air outlet of the pulse-jet filter dust collector 1 is connected to the air inlet of the activated carbon adsorption box 2. The filter element of the pulse-jet filter dust collector 1 is equipped with an electromagnetic pulse automatic cleaning device 5 for automatically cleaning accumulated dust on the filter element surface. A dust hopper 6 is installed below the pulse-jet filter dust collector 1 to collect dust. The air outlet of the activated carbon adsorption box 2 is connected to the bottom of the spray tower 3, and an organic waste gas absorption liquid spraying device 7 is installed inside the spray tower 3. The air outlet at the top of the spray tower 3 is further connected to a fan 8, which is connected to an exhaust pipe 9 for discharge. A detection platform 10 is installed on the exhaust pipe 9. By setting the fan, the required airflow can be controlled by adjusting the frequency converter according to production needs, achieving energy-saving effects. By setting up a detection platform on the exhaust duct, the quality of the emitted gas can be monitored in real time.

[0022] The flue gas treatment process for the flue gas generated during the combustion performance testing of building materials using the flue gas purification system of this embodiment is as follows:

[0023] The flue gas purification system in this embodiment is designed with an air volume of 30,000 m³ / h. 3 / h. The exhaust gas generated from the combustion of building materials is collected in the gas collection buffer box 4 and then enters the pulse-jet filter dust collector 1. The resistance of the pulse-jet filter dust collector 1 increases with the thickness of the dust layer on the surface of the filter element (the filter element is a membrane filter element, and its filter material is treated with polytetrafluoroethylene (PTFE), which is more wear-resistant, chemically stable, and corrosion-resistant than other ordinary filter elements). At this time, the PLC program controls the opening and closing of the pulse valve. When the pulse controller sets the time, the electromagnetic pulse valve opens, and compressed air rushes into the filter element in a short time, causing the filter element to expand and deform, generating vibration. Under the action of the reverse airflow, the dust attached to the outer surface of the filter element is peeled off and falls into the ash hopper 6. The detached dust falls into the ash hopper and is discharged through the ash discharge valve. The ash cart is cleaned regularly. The pulse controller automatically blows the filter element with the pulse valve every 30-45 seconds to clean the dust, so that the dust on the filter element can be blown off in time, reducing resistance and allowing the gas to flow faster. The exhaust gas, after particulate matter has been removed by the pulse-jet filter dust collector 1, enters the activated carbon adsorption box 2. The activated carbon adsorption box 2 uses honeycomb activated carbon, which is characterized by its large specific surface area, low pore resistance, well-developed micropores, high adsorption capacity, and long service life, making it widely used in exhaust gas treatment. The honeycomb activated carbon adsorption method involves the exhaust gas contacting the porous activated carbon with its large surface area, causing the pollutants in the exhaust gas to be adsorbed, thus achieving a purification effect. It is important to avoid excessively high temperatures, as these will reduce the adsorption capacity; the adsorption capacity decreases as temperature rises. High dust and oil mist content should also be avoided, as tar and dust mist will clog the micropores of the activated carbon, increasing resistance and reducing adsorption efficiency. If the environment contains a large amount of concentrated dust and tar, pretreatment to remove dust and oil should be performed before the exhaust gas enters the activated carbon adsorption box to achieve optimal performance and maximize service life. The waste gas treated by the activated carbon adsorption box 2 enters the spray tower 3 from the bottom, where it comes into counter-current contact with the organic waste gas absorption liquid sprayed by the organic waste gas absorption liquid spray device 7. Harmful substances in the waste gas are absorbed by the absorption liquid, resulting in purified gas. The gas purified by the spray tower 3 is then discharged through the exhaust pipe 9 by the suction force of the terminal negative pressure fan 8. A detection port is further installed on the exhaust pipe 9 for monitoring the emitted gas.

[0024] Referring to the environmental benefits and cost analysis of typical VOCs treatment technologies for process waste gas in the "Technical Guidelines for the Prevention and Control of Volatile Organic Compound Pollution in Laboratories," the treatment efficiency of the activated carbon adsorption box of this utility model is between 50% and 80%. For a conservative estimate, the single-stage activated carbon adsorption treatment efficiency in this project is calculated as 75%. The combined (secondary activated carbon) treatment efficiency is calculated as follows: 1 - (1 - 75%) × (1 - 75%) = 93.75%; this device conservatively uses 90%. The treatment efficiency of a spray tower can typically reach over 80%-90%; therefore, the overall treatment efficiency of this device, consisting of a pulse-jet filter dust collector, a secondary activated carbon adsorption box, and a PP spray tower, reaches 90%.

[0025] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A flue gas purification system for testing the combustion performance of building materials, characterized in that, It includes a pulse-jet filter dust collector, an activated carbon adsorption box, and a spray tower connected in sequence by pipes; the outlet of the pulse-jet filter dust collector is connected to the inlet of the activated carbon adsorption box; the outlet of the activated carbon adsorption box is connected to the bottom of the spray tower, and an organic waste gas absorption liquid spraying device is installed inside the spray tower.

2. The flue gas purification system for testing the combustion performance of building materials according to claim 1, characterized in that, The pulse-jet filter dust collector is equipped with an electromagnetic pulse automatic blowing device for automatically cleaning the dust accumulated on the surface of the filter element; a dust hopper is installed at the bottom of the pulse-jet filter dust collector to collect the dust.

3. The flue gas purification system for testing the combustion performance of building materials according to claim 1, characterized in that, The air inlet of the pulse-jet filter dust collector is connected to an air collection buffer box.

4. The flue gas purification system for testing the combustion performance of building materials according to claim 1, characterized in that, The activated carbon adsorption box uses honeycomb activated carbon.

5. A flue gas purification system for testing the combustion performance of building materials according to claim 1, characterized in that, The spray tower and pipelines are both made of PP material.

6. A flue gas purification system for testing the combustion performance of building materials according to claim 1, characterized in that, The air outlet at the top of the spray tower is further connected to a fan, which is connected to an exhaust pipe, and a testing platform is installed on the exhaust pipe.

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