Liquid catalyst and system for detecting improvement of coal combustion efficiency thereof

Abstract

The application discloses a kind of liquid catalyst and its coal combustion efficiency promotion detection system, belong to coal chemical technology field, catalyst includes active metal ion and other adjusting combustion performance substance, can reduce the activation energy of coal combustion and promote combustion rate.Further, in response to the characteristics of each coal and the adaptability of the catalyst is used in cooperation with the requirements of each formula of the catalyst, while proposing a kind of catalyst for coal combustion efficiency promotion detection system, detection system includes multiple test chambers, by accurately adjusting the test environment of coal powder and catalyst, provide high consistency test, and adopt batch circulation type test, to quickly and efficiently verify the promotion effect of catalyst on the combustion of different coal, to determine the optimized ratio value of each component in catalyst for specific coal.

Description

Technical Field

[0001] This invention belongs to the field of coal chemical technology, specifically, it relates to a liquid catalyst and its detection system for improving coal combustion efficiency. Background Technology

[0002] Coal, as an important fossil energy source, is widely used in power generation, metallurgy, and chemical industries. However, the energy utilization efficiency of coal combustion is low, while generating large amounts of pollutants such as carbon dioxide, carbon monoxide, nitrogen oxides, and sulfur oxides, which have a significant impact on the environment. Therefore, improving coal combustion efficiency and reducing pollutant emissions has become one of the key research directions in current coal utilization technologies.

[0003] Traditional coal combustion technologies suffer from low burnout rates, slow combustion rates, and high initial ignition points, leading to fuel waste and incomplete combustion. Furthermore, differences in volatile matter, ash content, and calorific value among different coal types further complicate improving combustion efficiency. While some progress has been made in recent years through optimizing combustion devices and improving combustion conditions, the application of catalytic combustion technology, which addresses the high activation energy of coal, is still in its early stages.

[0004] Liquid catalysts, due to their flexible formulation, uniform spraying capability, and strong adaptability, have become an important approach to solving coal combustion problems. By adding an appropriate amount of catalyst to pulverized coal, the combustion activation energy can be effectively reduced, the coal combustion rate accelerated, and emissions of carbon monoxide and unburned carbon reduced. However, currently, there is a lack of systematic research and comprehensive testing methods regarding the preparation process of liquid catalysts and their mechanism of action in improving coal performance. Therefore, developing a high-efficiency liquid catalyst and a corresponding performance testing system can not only optimize coal combustion efficiency but also provide technical support for energy conservation and emission reduction goals.

[0005] A review of relevant publicly available technologies reveals the following: CN102621286B proposes a testing device for determining the optimal dosage of catalyst. This device adjusts the amount of catalyst added during coal combustion by real-time measurement of steam temperature and heat consumption in the boiler during production. US20230010507A1 proposes a method for studying the influence of coal ash adhesion on combustion efficiency, thereby optimizing the furnace air intake settings to ensure good combustion of pulverized coal. 201432255A proposes a method for evaluating coal combustion efficiency, thereby calculating the feasibility of using specific biomass to replace coal in combustion.

[0006] The above technical solutions all propose various methods for evaluating the combustion effect of coal. However, with the further development of chemical research and the increasing requirements for environmental protection, there is still much room for improvement in the exploration of efficient coal combustion.

[0007] The foregoing description of the background art is intended only to facilitate understanding of the invention. This description does not endorse or acknowledge any common general knowledge in the materials mentioned. Summary of the Invention

[0008] The purpose of this invention is to provide a liquid catalyst and its detection system for improving coal combustion efficiency, belonging to the field of coal chemical technology. The catalyst includes active metal ions and other substances that regulate combustion performance, enabling it to reduce the activation energy of coal combustion and increase the combustion rate. Furthermore, considering the characteristics of different coal types and the adaptability requirements of the catalyst, to further optimize the formulation of each component in the catalyst, a detection system for improving coal combustion efficiency is also proposed. The detection system includes multiple test chambers, providing highly consistent testing by precisely adjusting the testing environment of pulverized coal and catalyst. Batch cyclic testing is employed to quickly and efficiently verify the catalyst's effect on improving the combustion of different coal types, thereby determining the optimal ratio of each component in the catalyst for specific coal types.

[0009] The present invention adopts the following technical solution: a liquid catalyst, wherein the catalyst formulation comprises the following components by mass percentage: pure water, 65%–75%; sodium chloride, 3%–7%; cobalt nitrate, 0.3%–2.1%; lanthanum nitrate, 1.5%–7.5%; nickel nitrate, 0.2%–3.8%; zinc chloride, 1%–5%; magnesium chloride, 2%–8%; calcium chloride, 5%–12%; copper chloride, 0.5%–4.5%; ferric citrate, 2%–5%; sodium acetate, 3%–10%; potassium iodide, 0.2%–2.5%; urea, 1.5%–5%; citric acid, 1.5%–4.5%; and potassium hydroxide, 3%–7%.

[0010] Preferably, the catalyst is liquid at room temperature and is required to meet the following physical values: pH value: 5-7; solid content: 25%-35%; density: 1.15-1.2.

[0011] Meanwhile, a catalyst-based coal combustion efficiency improvement detection system is proposed. The detection system is used to detect the catalyst. The detection system determines the appropriate catalyst formulation ratio for a specific coal type by batch cyclically measuring the effect of catalysts prepared with the same or different formulation ratios on multiple coal types. The detection system includes: a blower, a coal silo, a powder mixer, a mixer, a flow stabilizer, and multiple test chambers, as well as pipelines for connecting the components.

[0012] The blowing device is configured to provide a driving airflow for the pulverized coal in the detection system, so as to transport the pulverized coal and air within the system and provide some of the required air for the pulverized coal combustion test;

[0013] The coal silo is configured to store the coal raw material to be tested and to quantitatively deliver the coal raw material to the powder mixing machine;

[0014] The coal mixing machine is configured to crush coal raw materials into coal powder with a target particle size, and to uniformly spray the catalyst onto the coal powder by spraying, so that the coal powder and the catalyst are fully mixed.

[0015] The mixer is configured to mix the airflow from the blowing device with the pulverized coal prepared by the pulverizer to form a pulverized coal airflow, and to deliver the mixed pulverized coal airflow to the flow stabilizer distributor;

[0016] The flow stabilizer is configured to have an airflow distribution function to achieve stable fluidization and uniform distribution of pulverized coal airflow, and to quantitatively distribute pulverized coal airflow to multiple test chambers;

[0017] Multiple test chambers are connected to a flow distributor, each test chamber having a sealed combustion space and configured to independently test the combustion performance of pulverized coal;

[0018] Furthermore, the detection system also includes a control unit, which is circuitically connected to various working modules, devices and / or components in the detection system to control these working modules, devices and / or components to work together.

[0019] Preferably, the current distributor is in the shape of a vertical cylinder and includes:

[0020] The inlet section connects to the mixer and is used to receive the mixed pulverized coal; the inlet section is a gradually expanding funnel shape.

[0021] The middle section connects to the inlet section and is cylindrical. Inside the middle section, there is a fluidized bed with an average airflow velocity of 1 to 2 m / s, which is used to reduce the fluctuation of pulverized coal concentration and to retain some pulverized coal in the middle section by forming an internal circulation structure.

[0022] A spiral guide ridge is set on the inner wall of the middle section. The guide ridge is in the form of a single spiral or a double spiral. It generates a vortex effect by guiding the airflow, which further enhances the suspension effect of pulverized coal near the pipe wall.

[0023] The outlet section, connected to the intermediate section, has a tapered structure to accelerate the flow rate of airflow and pulverized coal, so that the pulverized coal airflow enters the downstream test chamber in a uniform and stable state.

[0024] The split structure, connected to the outlet section, is used to quantitatively distribute pulverized coal gas flow to multiple test chambers. Each split end is equipped with a regulating valve to adjust the airflow and pulverized coal distribution in each test chamber as needed.

[0025] Preferably, the test chamber includes a top cover, a hopper at the bottom, and a chamber wall surrounding the top cover and the hopper to form a closed combustion space;

[0026] Multiple feed ports are provided on the middle section wall of the test chamber to receive the coal powder airflow delivered by the flow stabilizer distributor; an igniter is provided in the center of the feed ports to ignite the coal powder entering the test chamber.

[0027] The test chamber is also equipped with a combustion assist device, including a main air inlet and a secondary air inlet. The main air inlet is located below the feed port, and the secondary air inlet is located above the feed port. The outlet direction of the main air inlet is consistent with the radial direction of the test chamber, and the outlet direction of the secondary air inlet forms an angle β with the radial direction of the test chamber. By providing air with greater momentum and air with less momentum respectively, the flow and mixing of combustion gases in the test chamber are optimized.

[0028] Preferably, the detection system includes a deviation value assessment of the real-time detection results of multiple test chambers to evaluate the detection results in multiple test chambers during synchronous testing, in order to identify process abnormalities or data abnormalities.

[0029] The beneficial effects achieved by this invention are:

[0030] 1. The catalyst in this technical solution, as tested by experiments, can reduce the activation energy of coal combustion by about 30%, reduce the oxygen consumption of coal combustion by about 20%, reduce the heat absorption of coal combustion by about 30%, reduce carbon oxide emissions by about 15%, increase the coal combustion rate by about 5%, change the sieving characteristics of coal powder, inhibit the production of carcinogenic aromatic hydrocarbons from coal combustion by about 20%, and reduce the calcination melting temperature of cement raw materials by about 100 degrees Celsius.

[0031] 2. The detection system in this technical solution is adaptable to different coal types, utilizes a multi-chamber architecture to achieve batch testing, evaluates the impact of catalysts on the properties of various coals, and optimizes the formulation ratio through real-time monitoring and data analysis. The design of the flow stabilizer and high-precision sensors ensures the uniformity and consistency of the test results, thereby improving the applicability of the solution and the reliability of the data.

[0032] 3. The detection system of this technical solution adopts a modular design for each working module. The system can be maintained and upgraded by optimizing and replacing the working modules individually, thereby reducing the subsequent use and upgrade costs. Attached Figure Description

[0033] The invention will be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale, but rather the emphasis is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0034] Reference numerals: 2-Blowing device; 4-Coal silo; 6-Powder mixer; 8-Mixer; 10-Flow stabilizer; 12-Guide ridge; 20-Test chamber; 22-Top cover; 24-Hopper; 25-Combustion space; 26-Chamber wall; 28-Air outlet; 50-Control unit; 52-Feeding port; 53-Main blower; 54-Secondary blower; 521-Igniter; 700-Computer system; 702-Bus; 704-Processor; 706-Main memory; 708-Read-only memory; 710-Storage device; 712-Display; 714-Input device; 716-Cursor control device; 718-Network device;

[0035] Figure 1 This is a schematic diagram of the detection system described in an embodiment of the present invention;

[0036] Figure 2 This is a schematic diagram of the current distributor described in an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the feeding port structure in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the test chamber described in an embodiment of the present invention;

[0039] Figure 5 This is a top-view screenshot of the secondary air outlet in an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the computer system architecture used in the control unit described in this embodiment of the invention;

[0041] Figure 7 The catalyst of this invention is the subject of an experimental testing report from the Chinese Academy of Sciences. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to its embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Other systems, methods, and / or features of this embodiment will become apparent to those skilled in the art after reviewing the following detailed description. All such additional systems, methods, features, and advantages are intended to be included within this specification, within the scope of the invention, and protected by the appended claims. Further features of the disclosed embodiments are described in the following detailed description, and these features will become apparent from the following detailed description.

[0043] In the accompanying drawings of this invention, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation. Because the invention is constructed and operated in a specific orientation, the terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0044] Example 1: An exemplary liquid catalyst is provided, wherein the catalyst formulation comprises the following components by mass percentage: pure water, 65%–75%; sodium chloride, 3%–7%; cobalt nitrate, 0.3%–2.1%; lanthanum nitrate, 1.5%–7.5%; nickel nitrate, 0.2%–3.8%; zinc chloride, 1%–5%; magnesium chloride, 2%–8%; calcium chloride, 5%–12%; copper chloride, 0.5%–4.5%; ferric citrate, 2%–5%; sodium acetate, 3%–10%; potassium iodide, 0.2%–2.5%; urea, 1.5%–5%; citric acid, 1.5%–4.5%; and potassium hydroxide, 3%–7%.

[0045] Preferably, the catalyst is liquid at room temperature and is required to meet the following physical values: pH value: 5-7; solid content: 25%-35%; density: 1.15-1.2.

[0046] Meanwhile, a catalyst-based coal combustion efficiency improvement detection system is proposed. The detection system is used to detect the catalyst. The detection system determines the appropriate catalyst formulation ratio for a specific coal type by batch cyclically measuring the effect of catalysts prepared with the same or different formulation ratios on multiple coal types. The detection system includes: a blower, a coal silo, a powder mixer, a mixer, a flow stabilizer, and multiple test chambers, as well as pipelines for connecting the components.

[0047] The blowing device is configured to provide a driving airflow for the pulverized coal in the detection system, so as to transport the pulverized coal and air within the system and provide some of the required air for the pulverized coal combustion test;

[0048] The coal silo is configured to store the coal raw material to be tested and to quantitatively deliver the coal raw material to the powder mixing machine;

[0049] The coal mixing machine is configured to crush coal raw materials into coal powder with a target particle size, and to uniformly spray the catalyst onto the coal powder by spraying, so that the coal powder and the catalyst are fully mixed.

[0050] The mixer is configured to mix the airflow from the blowing device with the pulverized coal prepared by the pulverizer to form a pulverized coal airflow, and to deliver the mixed pulverized coal airflow to the flow stabilizer distributor;

[0051] The flow stabilizer is configured to have an airflow distribution function to achieve stable fluidization and uniform distribution of pulverized coal airflow, and to quantitatively distribute pulverized coal airflow to multiple test chambers;

[0052] Multiple test chambers are connected to a flow distributor, each test chamber having a sealed combustion space and configured to independently test the combustion performance of pulverized coal;

[0053] Furthermore, the detection system also includes a control unit, which is circuitically connected to various working modules, devices and / or components in the detection system to control these working modules, devices and / or components to work together.

[0054] Preferably, the current distributor is in the shape of a vertical cylinder and includes:

[0055] The inlet section connects to the mixer and is used to receive the mixed pulverized coal; the inlet section is a gradually expanding funnel shape.

[0056] The middle section connects to the inlet section and is cylindrical. Inside the middle section, there is a fluidized bed with an average airflow velocity of 1 to 2 m / s, which is used to reduce the fluctuation of pulverized coal concentration and to retain some pulverized coal in the middle section by forming an internal circulation structure.

[0057] A spiral guide ridge is set on the inner wall of the middle section. The guide ridge is in the form of a single spiral or a double spiral. It generates a vortex effect by guiding the airflow, which further enhances the suspension effect of pulverized coal near the pipe wall.

[0058] The outlet section, connected to the intermediate section, has a tapered structure to accelerate the flow rate of airflow and pulverized coal, so that the pulverized coal airflow enters the downstream test chamber in a uniform and stable state.

[0059] The split structure, connected to the outlet section, is used to quantitatively distribute pulverized coal gas flow to multiple test chambers. Each split end is equipped with a regulating valve to adjust the airflow and pulverized coal distribution in each test chamber as needed.

[0060] Preferably, the test chamber includes a top cover, a hopper at the bottom, and a chamber wall surrounding the top cover and the hopper to form a closed combustion space;

[0061] Multiple feed ports are provided on the middle section wall of the test chamber to receive the coal powder airflow delivered by the flow stabilizer distributor; an igniter is provided in the center of the feed ports to ignite the coal powder entering the test chamber.

[0062] The test chamber is also equipped with a combustion assist device, including a main air inlet and a secondary air inlet. The main air inlet is located below the feed port, and the secondary air inlet is located above the feed port. The outlet direction of the main air inlet is consistent with the radial direction of the test chamber, and the outlet direction of the secondary air inlet forms an angle β with the radial direction of the test chamber. By providing air with greater momentum and air with less momentum respectively, the flow and mixing of combustion gases in the test chamber are optimized.

[0063] Preferably, the detection system includes a deviation value assessment of the real-time detection results of multiple test chambers to evaluate the detection results in multiple test chambers during synchronous testing, in order to identify process abnormalities or data abnormalities.

[0064] In an exemplary embodiment, the following components are included as active metal ion providers: lanthanum nitrate, nickel nitrate, cobalt nitrate, zinc chloride, magnesium chloride, calcium chloride, copper chloride, and ferric citrate. By providing active metal ions, these components can participate in the coal combustion reaction and reduce the activation energy, thereby enhancing the catalytic effect. Furthermore, the redox reaction during combustion helps to reduce the activation energy and increase the combustion rate.

[0065] In an exemplary embodiment, sodium chloride, magnesium chloride, calcium chloride, and copper chloride are used as co-solvents and stabilizers to adjust the solubility and stability of the solution, thereby ensuring the consistency of the catalyst during storage and application. Furthermore, these substances in the solution can help maintain ion balance, avoid precipitation or crystallization between catalyst components, and ensure the stability of the catalyst during use.

[0066] In an exemplary embodiment, urea and potassium iodide, as reducing and oxidizing agents, can regulate the redox balance in coal combustion by providing or consuming oxygen. Urea can decompose into nitrogen compounds during combustion, thus aiding combustion and reducing the formation of oxygen compounds. Potassium iodide can promote the redox reaction of carbon at high temperatures, thereby improving combustion efficiency.

[0067] In an exemplary embodiment, the catalyst preparation process includes adding a pH adjuster to adjust the pH value of the catalyst and ensure that it is in an optimal chemically active state during combustion; wherein, potassium hydroxide, as an alkaline substance, can significantly enhance the alkalinity of the catalyst solution; and citric acid, as a weak acid, can provide buffering capacity to ensure that the pH value of the catalyst is maintained in the range of 5-7.

[0068] In an exemplary embodiment, a complexing agent and a chelating agent are added during the catalyst preparation process to form complexes with metal ions, prevent the precipitation of metal ions, and ensure the uniformity of the catalyst; in particular, citric acid has a strong chelating ability, which can stabilize metal ions, avoid precipitation during storage, and improve the overall activity and stability of the catalyst.

[0069] In an exemplary embodiment, a combustion improver is used to assist the combustion reaction of coal and increase the combustion rate. Sodium acetate can decompose during combustion to generate active substances, enhancing the activity of the combustion reaction and increasing the heat release during coal combustion.

[0070] Furthermore, the different proportions of each component in the catalyst can be adjusted, and individual adjustments can be made according to the characteristics of each coal raw material production area or type, so as to further improve the effect of the catalyst. Therefore, this technical solution further proposes a catalyst enhancement effect detection system based on the proposed technical solution.

[0071] As attached Figure 1 The diagram illustrates an exemplary architectural layout of the detection system, which includes a blower 2, a coal silo 4, a powder mixer 6, a mixer 8, a flow stabilizer 10, and multiple test chambers 20 (two are shown exemplarily in the diagram) and corresponding connecting pipes.

[0072] Furthermore, the detection system also includes a control unit (not shown in the figure), which is circuitically connected to various working modules, devices and / or components in the detection system to control these working modules, devices and / or components to work together.

[0073] Preferably, after the coal raw material falls from the coal silo 4, it is ground by the powder mixing machine 6 to obtain coal powder with a specified particle size; at the same time, the powder mixing machine 6 is equipped with a turning mechanism; the turning mechanism continuously turns the coal powder to prevent coal powder from agglomerating; at the same time, the powder mixing machine 6 sprays catalyst onto the coal powder in the form of a spray through multiple nozzles, and the turning mechanism further mixes the atomized catalyst with the coal powder evenly; and the powder mixing machine 6 includes weighing the coal powder to be output, and then conveying the specified weight of coal powder to the mixer 8 through a docking pipe.

[0074] Preferably, the coal powder produced by the powder mixing machine 6 has a size of 300 μm or smaller;

[0075] Preferably, the mixer 8 is used to mix the airflow from the blowing device 2 with the coal powder mixed from the coal powder mixer 6, and then transport it through the coal powder pipeline to enter the flow distributor 10 from the bottom end.

[0076] Further details are attached. Figure 2As shown, the flow stabilizer 10 is generally a vertically placed cylindrical shape, with its lower inlet section having a funnel-shaped opening; the cross-sectional area of ​​the circular surface of the middle section after the inlet section widens becomes larger. The average wind speed in the middle section of the flow stabilizer 10 is 1-2 m / s, creating a cold flow field similar to that in a fluidized bed. The pulverized coal in the middle section rises with the airflow, and near the pipe wall, it forms a film and descends. Some of the pulverized coal dynamically remains in the middle section, forming an internal circulation and creating a fluidized bed, thus reducing the variation in the amount of pulverized coal entering the burner caused by fluctuations in the inlet pulverized coal concentration.

[0077] Furthermore, a spiral-shaped guide ridge 12 is provided on the inner wall of the flow distributor 10; preferably, the guide ridge has a protrusion height of 10-15cm; the guide ridge can be in the form of a single spiral or a double spiral; under the action of the guide ridge, the airflow in the middle section of the flow distributor 10 is further made to generate a certain vortex inside, and the coal powder can generate a stronger suspension effect near the pipe wall.

[0078] Furthermore, the outlet section of the flow distributor 10 gradually narrows, and the contraction of the inner diameter causes the airflow velocity to accelerate again, eventually reaching the normal supply airflow velocity in the test chamber 20. Preferably, the contraction angle of the outlet section is 20-30 degrees. In the outlet section, the airflow accelerates first, and the pulverized coal accelerates synchronously as it is driven by the airflow. In the section connecting the outlet section to the test chamber 20 and at the nozzle of the test chamber 20, the airflow velocity is still higher than the pulverized coal velocity, increasing the residence time of the pulverized coal, which is beneficial to the ignition and complete combustion of the pulverized coal, thus ensuring the consistency of the test data.

[0079] Further details are attached. Figure 4 The illustration shows an exemplary embodiment of the test chamber.

[0080] The test chamber 20 includes a top cover 22 at the top, a hopper 24 at the bottom, and a chamber wall 26 surrounding the top cover 22 and the hopper 24 to form a closed combustion space 25; the combustion gases generated in the combustion space 25 flow from bottom to top and are finally discharged at the air outlet 28.

[0081] Preferably, a plurality of feed ports 52 are installed in the lower part of the test chamber 20; preferably, the plurality of feed ports 52 are evenly arranged at multiple positions on the chamber wall 26 to form multiple points around the combustion space 25 for feeding coal powder into the test chamber 20 and igniting at the time of feeding; in some embodiments, the plurality of feed ports 52 are installed on the front chamber wall and the rear chamber wall of the test chamber 20 and the plurality of feed ports 52 are arranged opposite to each other.

[0082] Furthermore, in a preferred embodiment, the structure of the feed port 52 is as shown in the attached figure. Figure 3As shown; the feed port 52 is pipe-shaped and connected to one of the branch ends of the flow distributor 10; a known mass of coal powder mixed with catalyst enters the test chamber through the feed port 52 along with the output airflow of the flow distributor 10. Preferably, an igniter 521 is provided at the front end of the feed port 52, and preferably, the ignition element 521 is located in the center of the feed port 52; preferably, the feed port 52 can be a plasma igniter for forming a flame 53 with highly controllable temperature and combustion characteristics. As the coal powder is ejected from the feed port 52, the control unit controls the ignition element 521 to ignite the ejected coal powder in a timely manner, so that the coal powder continues to burn in the test chamber 20.

[0083] Preferably, a plurality of main air outlets 53 are provided below the feed inlet 52, and a plurality of auxiliary air outlets 54 are provided above the feed inlet 52; the main air outlets 53 and the auxiliary air outlets 54 are connected to additional blowers different from the blowing device, so as to realize independent control of the air volume of the two.

[0084] The main air outlet 53 and the auxiliary air outlet 54 have the same outlet direction, both forming a horizontal angle α with the horizontal direction and pointing upwards. The difference is that the outlet direction of the main air outlet 53 is the same as the radial direction of the test chamber 20, while the outlet direction of the auxiliary air outlet 54 forms an angle β with the radial direction of the test chamber 20, as shown in the attached diagram. Figure 5 The diagram shows a top cross-sectional view of the secondary air outlet 54.

[0085] The air supplied by the main air outlet 53 and the auxiliary air outlet 54 is mainly used to supplement the insufficient air supplied to the test chamber 20 by the feed inlet 52. Since the air in the feed inlet 52 is mainly used to transport pulverized coal, and based on the requirements of testing, it is desirable that the objective conditions during testing be roughly uniform. Therefore, if the air flow rate and velocity of the feed inlet 52 are set too high, it is easy to cause a large standard deviation in the state parameters such as weight and flow velocity of pulverized coal when it enters the test chamber 20 each time, thus affecting the reference consistency of the test.

[0086] The main air outlet 53 ejects air with significant momentum that reaches the vicinity of the center of the test chamber 20, while the secondary air outlet 54 ejects air with less momentum that flows towards the vicinity of the chamber wall. This arrangement creates a certain circulation above the test chamber 20, causing some stagnation of the combustion gases rising from the bottom of the chamber 20 and reducing the upward velocity of the combustion gases near the chamber wall. Simultaneously, the forced-air flow supplied by the main air outlet 53 is not disturbed by the combustion gases near the furnace wall and is supplied directly to the center of the test chamber 20.

[0087] In the scenario where the secondary air vent 54 is provided, the combustion gas rising from the bottom of the combustion space 25 mixes with the jet stream from the main and secondary air vents, but a portion passes through the space between the main and secondary air vents. The unburned gas that passes through experiences a reduced upward velocity and stagnates downstream of the main and secondary air vents. Therefore, when secondary secondary air is supplied from the secondary air vent in this stagnant area, it promotes the mixing of combustion gas and air near the furnace wall.

[0088] Preferably, one or more oxygen concentration sensors are installed in the test chamber 20 to detect the oxygen concentration in the space of the test chamber 20. Furthermore, according to testing needs, the control unit can be configured to adjust the air intake of the multiple main air inlets 53 and auxiliary air inlets 54 based on signals from the oxygen concentration sensors. For example, based on signals from the multiple oxygen concentration detectors, when the oxygen concentration at the center of the combustion chamber is low, the air intake of the main air inlets 53 is increased while the air intake of the auxiliary air inlets 54 is appropriately reduced; conversely, when the oxygen concentration near the furnace wall is low, the air intake of the auxiliary air inlets 54 is increased.

[0089] The following effects can be achieved by setting the above:

[0090] (1) Ensure stable testing environment conditions when measuring the performance of coal samples in small batches and multiple times;

[0091] (2) Ensure that the pulverized coal can be fully and evenly burned;

[0092] (3) Ensure that the ignition conditions of the pulverized coal can be determined and controlled by the settings of the igniter.

[0093] Example 2: This example should be understood as including at least all the features of any of the foregoing examples, and further improving upon them.

[0094] To further determine various performance data of the pulverized coal sample, such as combustion rate, initial ignition point, and final ignition point, multiple sensors can be configured inside and outside the test chamber 20.

[0095] Preferably, during the transmission process from the flow distributor 10 to the test chamber 20, a high-precision mass flow meter is configured to measure the mass flow rate of pulverized coal entering the test chamber in real time; each hopper 24 of the test chamber 20 is equipped with an ash collector and a mass sensor to collect the ash generated after combustion and to measure the weight of the ash in real time.

[0096] Preferably, a flue gas analyzer is installed in the air outlet 28 of the test chamber 20 to measure the concentrations of CO and CO2 generated during combustion, and a flue gas collection device is installed at the end of the air outlet 28 to collect the amount of CO2 generated, so as to calculate the combustion rate of the pulverized coal sample according to the following formula:

[0097] Combustion rate = weight of CO2 generated by combustion / theoretical weight of CO2 × 100%.

[0098] At the same time, NO can be calculated using flue gas collection devices. x and SO x The amount of gas released is used to determine the extent of its release.

[0099] Furthermore, a high frame rate infrared thermal imager is installed outside the test chamber 20, and the flame generation time is detected by image detection through the observation window in the feed port 52. The temperature distribution and time points of the flame are recorded, and the initial ignition point and final ignition point are calculated by combining the temperature data of the temperature sensor in the combustion space 25.

[0100] Furthermore, by combining the time when the CO concentration detected by the flue gas analyzer at outlet 28 approaches zero, the time point of final ignition can be confirmed when the CO concentration approaches zero.

[0101] Furthermore, in a preferred embodiment, in order to evaluate the uniformity of test data from multiple test chambers 20 in real time, and to adjust or stop testing in a timely manner when test conditions fluctuate, the testing system includes a process monitoring step to evaluate the average performance of multiple test chambers 20 under the same conditions.

[0102] For example, taking the allocation of pulverized coal samples to each test chamber as an example, the following process monitoring steps are performed:

[0103] S100: Monitor key parameters, including measuring the mass and flow rate of pulverized coal entering each test chamber, monitoring airflow velocity, and monitoring the mass concentration of pulverized coal in the airflow.

[0104] S200: Records multiple monitoring data points based on time series and performs real-time calculations in conjunction with the following sub-steps:

[0105] S210: Calculate the total output pulverized coal sample flow rate, i.e., by measuring the total pulverized coal mass flow rate output from the flow stabilizer distributor 10:

[0106]

[0107] Where n is the number of testing chambers used in this test; m i Let be the mass flow rate of pulverized coal entering the i-th test chamber.

[0108] S220: Calculate the actual allocation ratio P for each test chamber. i And the ideal allocation ratio P ideal :

[0109]

[0110]

[0111] S230: Calculate the distribution uniformity σ:

[0112]

[0113] When σ approaches zero, the uniformity is better, and an upper limit value σ needs to be set. max To achieve when σ is greater than σ max Stop the current test and check if there is any abnormality in the operation of the current distributor 10.

[0114] Based on the uneven distribution phenomenon, various implementation details of the current distributor 10 can be checked and / or adjusted accordingly, for example:

[0115] Adjust the design of the flow guide ridges and optimize the angle or number of spiral flow guide ridges inside the flow stabilizer distributor 10;

[0116] Airflow balancing valve control: A dynamic airflow regulating valve is added to each branch pipe to adjust the airflow based on real-time detection data;

[0117] Other intelligent adjustments include transmitting monitoring data to the control unit and using algorithms to dynamically adjust the airflow pressure or direction within the distributor.

[0118] The following uniformity calculation can also be used to monitor other indicators so that the testing can be stopped in time when a certain indicator shows large fluctuations in uniformity.

[0119] Example 3: This example should be understood as including at least all the features of any of the foregoing examples, and further improving upon them;

[0120] For example, as shown in the appendix Figure 6 The diagram illustrates an implementation of the computer system 700 used in the control unit of the detection system; the computer system 700 can be applied to the data storage, computation, and result output processes of each working module in the identification and judgment system.

[0121] For example, computer system 700 includes bus 702 or other communication mechanism for transmitting information, and one or more processors 704 coupled to bus 702 for processing information; processor 704 may be, for example, one or more general-purpose microprocessors.

[0122] The computer system 700 also includes a main memory 706, such as random access memory (RAM), cache and / or other dynamic storage devices, coupled to a bus 702 for storing information and instructions to be executed by the processor 704; the main memory 706 may also be used to store temporary variables or other intermediate information during the execution of instructions executed by the processor 704; when these instructions are stored in a storage medium accessible to the processor 704, the computer system 700 presents itself as a dedicated machine customized to perform the operations specified in the instructions;

[0123] The computer system 700 may also include a read-only memory (ROM) 708 or other static storage device coupled to the bus 702 for storing static information and instructions of the processor 704; wherein a storage device 710, such as a disk, optical disk or USB drive (flash drive), is coupled to the bus 702 for storing information and instructions.

[0124] Furthermore, the bus 702 may also include a display 712 for displaying various information, data, media, etc., and an input device 714 for allowing users of the computer system 700 to control, manipulate, and / or interact with the computer system 700.

[0125] A preferred method of interacting with the management system may be through a cursor control device 716, such as a computer mouse or a similar control / navigation mechanism;

[0126] Furthermore, the computer system 700 may also include a network device 718 coupled to the bus 702; wherein the network device 718 may include components such as wired network cards, wireless network cards, switching chips, routers, switches, etc.

[0127] Generally speaking, the terms “engine,” “component,” “system,” and “database” used in this article can refer to the logic embodied in hardware or firmware, or to a set of software instructions that may have entries and exit points, written in programming languages ​​such as Java, C, or C++; software components can be compiled and linked into executable programs and installed in dynamic link libraries, or can be written in interpreted programming languages ​​(such as BASIC, Perl, or Python); it should be understood that software components can be called from other components or from themselves, and / or can be called in response to detected events or interrupts;

[0128] Software components configured to execute on a computing device may be provided on a computer-readable medium, such as an optical disc, digital video disc, flash drive, magnetic disk, or any other tangible medium, or as a digital download (and may be initially stored in a compressed or installable format, requiring installation, decompression, or decryption prior to execution); such software code may be stored, in part or in whole, on a memory device executing the computing device; software instructions may be embedded in firmware, such as an EPROM; it should also be understood that hardware components may consist of connected logic units (e.g., gates and flip-flops), and / or may consist of programmable units (e.g., programmable gate arrays or processors);

[0129] The computer system 700 includes technologies described herein that can be implemented using custom hardwired logic, one or more ASICs or FPGAs, firmware and / or program logic, which, when combined with the computer system, enables the computer system 700 to become a dedicated computing device.

[0130] According to one or more embodiments, the techniques described herein are executed by a computer system 700 in response to a processor 704 executing one or more sequences of one or more instructions contained in main memory 706; such instructions may be read into main memory 706 from another storage medium such as storage device 710; execution of the sequence of instructions contained in main memory 706 causes processor 704 to perform the processing steps described herein; in alternative embodiments, hardwired circuitry may be used in place of or in combination with software instructions.

[0131] As used herein, the term "non-transitory medium" and similar terms refer to any medium that stores data and / or instructions that enable a machine to operate in a particular manner; such non-transitory medium may include non-volatile medium and / or volatile medium; non-volatile medium includes, for example, optical discs or magnetic disks, such as storage device 710; volatile medium includes dynamic memory, such as main memory 706.

[0132] Common forms of non-transitory media include, for example, floppy disks, hard disks, solid-state drives, magnetic tapes or any other magnetic data storage media, CD-ROMs, any other optical data storage media, any physical media with a hole pattern, RAM, PROM and EPROM, FLASH-EPROM, NVRAM, any other memory chips or cartridges and their network versions.

[0133] Non-transient media are different from transmission media, but can be used in conjunction with transmission media; transmission media participate in information transmission between non-transient media; for example, transmission media include coaxial cables, copper wires and optical fibers, including the wires that constitute bus 702; transmission media can also take the form of sound waves or light waves, such as radio waves and infrared data communication.

[0134] While the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications can be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations can be appropriately omitted, substituted, or added to various processes or components. For example, in alternative configurations, methods can be performed in a different order than those described, and / or various components can be added, omitted, and / or combined. Moreover, features described with respect to certain configurations can be combined in various other configurations, such as different aspects and elements of the configuration can be combined in a similar manner. Furthermore, the elements therein can be updated as the technology develops; that is, many elements are examples and do not limit the scope of this disclosure or the claims.

[0135] Specific details are provided in the specification to offer a thorough understanding of exemplary configurations, including implementations. However, configurations can be practiced without these specific details; for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail to avoid obscuring the configuration. This description provides only exemplary configurations and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes can be made to the function and arrangement of the elements without departing from the spirit or scope of this disclosure.

[0136] In summary, the above detailed description is intended to be illustrative rather than restrictive, and it should be understood that these embodiments are for illustrative purposes only and not for limiting the scope of protection of the invention. After reading the description of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent changes and modifications also fall within the scope defined by the claims of this invention.

Claims

1. A catalyst for coal combustion efficiency enhancement detection system, characterized in that, The detection system is used for detecting catalyst; the catalyst is liquid at room temperature, and requires to meet the following physical values: pH value: 5-7; solid content: 25%-35%; density: 1.15-1.2; the detection system determines the applicable catalyst formula proportion for specific coal by batch circulating determination of the effects of catalysts prepared by the same formula proportion or different formula proportions on multiple coal types; The detection system comprises a blowing device, a coal bin, a powder distributor, a mixer, a steady flow distributor and a plurality of test chambers, and pipelines for connecting the components; The blowing device is configured to provide a driving air flow for the coal powder in the detection system, so that the coal powder and air are transported in the system, and part of the required air for the coal powder combustion test is provided; The coal bin is configured to store the coal raw material to be tested, and quantitatively transport the coal raw material to the powder distributor; The powder distributor is configured to crush the coal raw material into coal powder with a target particle size, and uniformly spray the catalyst on the coal powder by spraying, so that the coal powder and the catalyst are fully mixed; The mixer is configured to mix the air flow from the blowing device with the coal powder prepared by the powder distributor to form a coal powder air flow, and transport the mixed coal powder air flow to the steady flow distributor; The steady flow distributor is configured to have an air flow distribution function to realize stable fluidization and uniform distribution of the coal powder air flow, and quantitatively distribute the coal powder air flow to the plurality of test chambers; The plurality of test chambers are connected to the steady flow distributor, each test chamber has a closed combustion space, and is configured to independently perform combustion performance detection of the coal powder; The detection system further comprises a control unit, which is electrically connected to each working module, device and / or element in the detection system to control the coordinated work of the working modules, devices and / or elements; The powder distributor is internally provided with a turnover mechanism; the turnover mechanism continuously turns over the coal powder to prevent the coal powder from caking; at the same time, the powder distributor sprays the catalyst on the coal powder in the form of mist through a plurality of nozzles, and the mist-shaped catalyst and the coal powder are further uniformly mixed by the turnover mechanism; The size of the coal powder prepared by the powder distributor is 300μm or less; The steady flow distributor is in the form of a vertical cylinder and comprises: An inlet section which is in the form of a gradually expanding horn shape and is connected to the mixer to receive the mixed coal powder; An intermediate section which is connected to the inlet section and is in the form of a cylinder, and an internal cold flow field in the form of a fluidized bed with an average air flow velocity of 1-2m / s is formed in the intermediate section to reduce the fluctuation of the coal powder concentration and to make part of the coal powder stay in the intermediate section through the formation of an internal circulation structure; A spiral flow guide ridge which is arranged on the inner wall of the intermediate section, and the flow guide ridge is in the form of a single spiral or a double spiral, and a vortex effect is generated by guiding the air flow to further enhance the suspension of the coal powder near the pipe wall. ​ The outlet section is connected with the middle section and has a tapered structure for accelerating the flow speed of the gas flow and the coal powder, so that the coal powder gas flow enters the downstream test chamber in a uniform and stable state. The contraction angle of the outlet section is 20-30 degrees. In the outlet section, the gas flow is first accelerated, and the coal powder is simultaneously accelerated when driven by the gas flow. In the section connecting the outlet section with the test chamber and at the nozzle of the test chamber, the flow speed of the gas flow is still higher than the speed of the coal powder, which increases the residence time of the coal powder, facilitates the ignition and full combustion of the coal powder, and ensures the uniformity of the test data. The shunt structure is connected with the outlet section and is used for quantitatively distributing the coal powder gas flow to multiple test chambers. Each shunt end is provided with an adjusting valve for adjusting the gas flow and the distribution amount of the coal powder of each test chamber as needed. The combustion auxiliary device is provided in the test chamber and includes a main blowing port and a secondary blowing port. The main blowing port is located below the feeding port, and the secondary blowing port is located above the feeding port. The outlet direction of the main blowing port is consistent with the radial direction of the test chamber, and the outlet direction of the secondary blowing port forms an angle β with the radial direction of the test chamber. By respectively providing air with large momentum and air with small momentum, the flow and mixing of the combustion gas in the test chamber are optimized. More than one oxygen concentration sensor is provided in the test chamber for detecting the oxygen concentration in the test chamber space. According to the signals from multiple oxygen concentration sensors, when the oxygen concentration at the central position of the combustion chamber is low, the air intake amount of the main blowing port is increased while the air intake amount of the secondary blowing port is appropriately reduced. When the oxygen concentration near the furnace wall is low, the air intake amount of the secondary blowing port is increased.

2. The detection system of claim 1, wherein, The test chamber includes a top cover, a hopper at the bottom end, and a chamber wall surrounding the top cover and the hopper to form a closed combustion space. A plurality of feeding ports are provided on the middle section of the chamber wall of the test chamber for receiving the coal powder gas flow delivered by the steady flow distributor. A igniter is provided at the center of the feeding port for igniting the coal powder entering the test chamber.

3. The detection system of claim 2, wherein, The detection system can evaluate the deviation value of the real-time detection results of multiple test chambers to evaluate the detection results in the multiple test chambers in the synchronous test to identify the process abnormalities or data abnormalities.

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