Powdered activated coke performance evaluation device

Abstract

The present invention provides a device for evaluating the performance of powdered activated coke. The device includes a gas distribution system, a gas heating system, a feeding system, an entrained bed reaction system and a gas-solid separation system; the gas distribution system is used to configure simulated gas involved in the coking, desulfurization, denitrification, analytical regeneration or sulfur production process of powdered activated coke; the gas heating system is connected to the gas distribution system and is used to heat the simulated gas; the feeding system is used to provide solid reactants involved in the coking, desulfurization, denitrification, analytical regeneration or sulfur production process of powdered activated coke; the entrained bed reaction system is connected to the outlet of the gas heating system and the outlet of the feeding system; the gas-solid separation system is connected to the outlet of the entrained bed reaction system. The above-mentioned device provided by the present invention can be used to dynamically and comprehensively evaluate the relevant properties of powdered activated coke, providing a systematic and mature process for the performance evaluation of powdered activated coke.

Description

Technical Field

[0001] The invention relates to the technical field of coal chemical industry, and in particular to a device for evaluating the performance of powdered activated coke. Background Art

[0002] At present, the activated coke desulfurization technology usually adopts the moving bed scheme, using larger shaped activated coke or granular activated coke. This technology has been promoted and applied in treating the flue gas of steel sintering machines. Therefore, a relatively complete performance evaluation method has been formed for the performance of shaped activated coke or granular activated coke (desulfurization, analytical regeneration, etc.).

[0003] Powdered activated coke has a small particle size (≤200μm) and a large gas-solid contact area for the same mass of activated coke, which is conducive to the rapid adsorption of SO2. Powdered activated coke desulfurization technology has certain advantages in the rapid adsorption of sulfur-containing polluted gas. However, the current research on coking, desulfurization, and analytical regeneration of powdered activated coke is in its infancy, and the performance evaluation of powdered activated coke, especially the dynamic performance evaluation device and method, is immature. Summary of the invention

[0004] The main purpose of the present invention is to provide a powdered activated coke performance evaluation device to solve the problem that the dynamic performance evaluation method of powdered activated coke in the prior art is not mature and systematic enough.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a powdered activated coke performance evaluation device is provided, which includes: a gas distribution system for dispensing simulated gas involved in the coking, desulfurization, denitrification, analytical regeneration or sulfur production process of powdered activated coke; a gas heating system connected to the gas distribution system and used to heat the simulated gas; a feeding system for providing solid reactants involved in the coking, desulfurization, denitrification, analytical regeneration or sulfur production process of powdered activated coke; an entrained flow reaction system connected to the outlet of the gas heating system and the outlet of the feeding system; and a gas-solid separation system, which is connected to the outlet of the entrained flow reaction system.

[0006] Furthermore, the reactor element in the fluidized bed reaction system is a tubular reactor, which includes a plurality of heating tube segments and a plurality of light tube segments, and the plurality of heating tube segments and the plurality of light tube segments are spaced and connected one by one.

[0007] Furthermore, the tubular reactor is a coil reactor, which includes a plurality of straight tube sections and a curved tube section for connecting two adjacent straight tube sections, wherein the straight tube section is a heating tube section and the curved tube section is a smooth tube section.

[0008] Furthermore, the gas distribution system includes: a gas supply unit, including an NH3 gas supply device, a N2 gas supply device, an O2 gas supply device, a CO2 gas supply device, a NO gas supply device, a SO2 gas supply device and a water vapor gas supply device; a gas mixer, which is respectively connected to the NH3 gas supply device, the N2 gas supply device, the O2 gas supply device, the CO2 gas supply device, the NO gas supply device, the SO2 gas supply device and the water vapor gas supply device, and the gas mixer is also provided with a simulated gas outlet, which is connected to the gas heating system.

[0009] Furthermore, the gas heating system comprises a shell, which comprises a heating zone and an air intake zone from top to bottom, and a first inert bed material is arranged inside the heating zone.

[0010] Furthermore, the outlet of the feeding system is also connected to the heating zone, and the feeding system is used to supply desulfurized powdered activated coke. The simulated gas is the decomposition gas of the desulfurized powdered activated coke, wherein the particle size of the first inert bed material is more than 2.5 times the particle size of the desulfurized powdered activated coke.

[0011] Furthermore, the gas heating system also includes a slag discharge device, which is connected to the heating zone, and an outlet of the slag discharge device extends to the outside of the shell.

[0012] Furthermore, the gas-solid separation system comprises a first dust removal device and a second dust removal device which are connected in sequence, and the first dust removal device is connected to the outlet of the fluidized bed reaction system.

[0013] Furthermore, the first dust removal device is a cyclone dust collector or an inertial dust collector, and the second dust removal device is a ceramic filter or a metal sintered filter.

[0014] Furthermore, the gas-solid separation system is provided with a gas phase outlet, and the powdered activated coke performance evaluation device further comprises a cooling device, which is arranged on the pipeline where the gas phase outlet is located.

[0015] Furthermore, the cooling device is provided with a cooling gas outlet, and the powdered activated coke performance evaluation device also includes a gas purification system, which is connected to the cooling gas outlet.

[0016] Furthermore, the gas purification system comprises a desulfurization device and a denitration device connected in sequence, and the desulfurization device is connected to the cooling gas outlet.

[0017] Furthermore, the desulfurization device includes, from top to bottom, a first feed bin, a desulfurization unit, and a first slag discharge unit which are connected in sequence. The first feed bin is used to provide a second inert bed material, shaped activated carbon, shaped activated coke, granular activated carbon, granular activated coke, powdered activated carbon or powdered activated coke. The desulfurization unit is connected to the cooling gas outlet, and a first cooling coil device is arranged in the first slag discharge unit.

[0018] Furthermore, the denitrification device includes, from top to bottom, a second feed bin, a denitrification unit, and a second slag discharge unit which are connected in sequence. The second feed bin is used to provide a third inert bed material, shaped activated carbon, shaped activated coke, granular activated carbon, granular activated coke, powdered activated carbon or powdered activated coke. The denitrification unit is connected to the desulfurization unit, and a second cooling coil device is arranged in the second slag discharge unit.

[0019] Furthermore, the gas distribution system includes a gas supply unit and a gas mixer, the gas supply unit includes an NH3 gas supply device, a N2 gas supply device, an O2 gas supply device, a CO2 gas supply device, a NO gas supply device, a SO2 gas supply device and a water vapor gas supply device; the gas mixer is respectively connected with the NH3 gas supply device, the N2 gas supply device, the O2 gas supply device, the CO2 gas supply device, the NO gas supply device, the SO2 gas supply device and the water vapor gas supply device, and the gas mixer is also provided with a simulated gas outlet, which is connected to the gas heating system; the denitrification unit is connected to the desulfurization unit through a desulfurization gas transmission pipeline, and the desulfurization gas transmission pipeline is also connected to the gas supply port of the NH3 gas supply device.

[0020] Furthermore, when the powdered activated coke performance evaluation device is used to evaluate the coke making performance of activated coke, the simulated gas is the simulated gas of coke making flue gas, and the solid reactant is coal powder; when the powdered activated coke performance evaluation device is used to evaluate the desulfurization performance of activated coke, the simulated gas is the simulated gas of sulfur-containing flue gas, and the solid reactant is powdered activated coke; when the powdered activated coke performance evaluation device is used to evaluate the denitrification performance of activated coke, the simulated gas is the simulated gas of nitrate-containing flue gas, and the solid reactant is powdered activated coke; when the powdered activated coke performance evaluation device is used to evaluate the decomposition and regeneration performance of activated coke, the simulated gas is the simulated gas of decomposition gas, and the solid reactant is powdered activated coke after desulfurization; when the powdered activated coke performance evaluation device is used to evaluate the performance of activated coke making sulfur, the simulated gas includes CO2, SO2 and water vapor, and the solid reactant is powdered activated coke.

[0021] Furthermore, the first inert bed material is quartz sand and / or ceramic balls.

[0022] Furthermore, the second inert bed material and the third inert bed material are both quartz sand and / or ceramic balls.

[0023] The present invention provides a device for evaluating the performance of powdered activated coke, which comprises a gas distribution system, a gas heating system, a feeding system, an entrained bed reaction system and a gas-solid separation system; the gas distribution system is used to configure simulated gas involved in the coking, desulfurization, denitrification, analytical regeneration or sulfur production process of powdered activated coke; the gas heating system is connected to the gas distribution system and is used to heat the simulated gas; the feeding system is used to provide solid reactants involved in the coking, desulfurization, denitrification, analytical regeneration or sulfur production process of powdered activated coke; the entrained bed reaction system is connected to the outlet of the gas heating system and the outlet of the feeding system; the gas-solid separation system is connected to the outlet of the entrained bed reaction system.

[0024] In the device provided by the present invention, an entrained bed reaction system is used as a reaction site for simulating the coking, desulfurization, denitrification, analytical regeneration or sulfur production of powdered activated coke, so that the powdered activated coke can react in a dynamic state. Specifically, according to the type of performance to be evaluated, such as coking, desulfurization, denitrification, analytical regeneration or sulfur production performance, the corresponding simulated gas participating in the reaction can be configured through the gas distribution system, and then after heating, it is added to the entrained bed reaction system together with the solid powder related to the powdered activated coke for dynamic reaction, and the output material is separated from the gas by the gas-solid separation system to obtain the corresponding product. Finally, the product can be evaluated according to the conventional evaluation method in the field to reflect the relevant performance of the powdered activated coke.

[0025] In conclusion, the above-mentioned device provided by the present invention can be used to dynamically and comprehensively evaluate the relevant properties of powdered activated coke, providing a systematic and mature process for the performance evaluation of powdered activated coke. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 A schematic diagram of a device for evaluating the performance of powdered activated coke according to an embodiment of the present invention is shown.

[0028] The above drawings include the following reference numerals:

[0029] 1. Gas distribution system; 101. Gas supply valve; 102. Gas supply unit; 103. Gas mixer; 2. Gas heating system; 201. Deslagging device; 202. Air intake zone; 203. Heating zone; 3. Feeding system; 4. Fluidized bed reaction system; 401. Heating pipe section; 402. Light pipe section; 5. Gas-solid separation system; 501. Second dust removal device; 502. First dust removal device; 6. Cooling device; 7. Gas purification system; 70. Desulfurization device; 702. First cooling coil device; 703. First deslagging unit; 704. Desulfurization unit; 705. First feeding bin; 71. Denitrification device; 712. Second cooling coil device; 713. Second deslagging unit; 714. Denitrification unit; 715. Second feeding bin; 8. Induced draft device. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] The present application is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed in the present application.

[0032] As described in the background technology section, the existing methods for evaluating the dynamic performance of powdered activated coke are not mature and systematic enough.

[0033] In order to solve the above problems, the present invention provides a device for evaluating the performance of powdered activated coke, such as Figure 1 As shown, it includes a gas distribution system 1, a gas heating system 2, a feeding system 3, an entrained bed reaction system 4, and a gas-solid separation system 5; the gas distribution system 1 is used to configure simulated gas involved in the process of coking, desulfurization, denitrification, analytical regeneration or sulfur production of powdered activated coke; the gas heating system 2 is connected to the gas distribution system 1, and is used to heat the simulated gas; the feeding system 3 is used to provide solid reactants involved in the process of coking, desulfurization, denitrification, analytical regeneration or sulfur production of powdered activated coke; the entrained bed reaction system 4 is connected to the outlet of the gas heating system 2 and the outlet of the feeding system 3; the gas-solid separation system 5 is connected to the outlet of the entrained bed reaction system 4.

[0034] In the device provided by the present invention, an entrained bed reaction system 4 is used as a reaction site for simulating coke making, desulfurization, denitrification, analytical regeneration or sulfur making of powdered activated coke, so that the powdered activated coke can react in a dynamic state. Specifically, according to the type of performance to be evaluated, such as coke making, desulfurization, denitrification, analytical regeneration or sulfur making performance, the corresponding simulated gas participating in the reaction can be configured through the gas distribution system 1, and then after heating, it is added to the entrained bed reaction system 4 together with the solid powder related to the powdered activated coke for dynamic reaction, and the output material is separated from the gas by the gas-solid separation system 5 to obtain the corresponding product. Finally, the product can be evaluated according to the conventional evaluation method in the art to reflect the relevant performance of the powdered activated coke.

[0035] In conclusion, the above-mentioned device provided by the present invention can be used to dynamically and comprehensively evaluate the relevant properties of powdered activated coke, providing a systematic and mature process for the performance evaluation of powdered activated coke.

[0036] In a preferred embodiment, the reactor element in the fluidized bed reaction system 4 is a tubular reactor, which includes a plurality of heating tube segments 401 and a plurality of light tube segments 402, and the plurality of heating tube segments and the plurality of light tube segments 402 are arranged and connected one by one. The plurality of heating tube segments 401 can make the relevant reaction temperature of the powdered activated coke more stable, thereby making the evaluation more accurate. Preferably, as Figure 1 As shown, the tubular reactor is a coil reactor, which includes a plurality of straight tube sections and a curved tube section for connecting two adjacent straight tube sections, wherein the straight tube section is a heating tube section 401 and the curved tube section is a smooth tube section 402. After the reaction materials enter the tubular reactor, they react while flowing in the tube, and the reaction process remains in a moving state.

[0037] In a preferred embodiment, the gas distribution system 1 includes a gas supply unit 102 and a gas mixer 103, the gas supply unit 102 includes an NH3 gas supply device, a N2 gas supply device, an O2 gas supply device, a CO2 gas supply device, a NO gas supply device, a SO2 gas supply device and a water vapor gas supply device; the gas mixer 103 is respectively connected to the NH3 gas supply device, the N2 gas supply device, the O2 gas supply device, the CO2 gas supply device, the NO gas supply device, the SO2 gas supply device and the water vapor gas supply device, and the gas mixer 103 is also provided with a simulated gas outlet, which is connected to the gas heating system 2. During the specific operation process, different simulated gases can be configured according to different reaction types. For example, in the evaluation of the coke making performance of powdered activated coke, simulated flue gas can be configured, including N2, O2, CO2, NO, SO2, and water vapor; in the evaluation of the desulfurization performance of powdered activated coke, the flue gas after dust removal and desulfurization can be configured, including N2, O2, CO2, NO, SO2, and water vapor; when evaluating the denitrification performance of powdered activated coke, the flue gas after dust removal and desulfurization of powdered activated coke can be configured, including CO2, NO, and water vapor; when evaluating the performance of powdered activated coke in reducing SO2 to make sulfur, the decomposed gas after the decomposition of powdered desulfurized activated coke can be configured, including CO2, SO2, water vapor, and so on.

[0038] Preferably, in the gas supply unit 102, each gas supply pipeline is provided with a gas supply valve 101 for controlling on and off.

[0039] The purpose of the gas heating system 2 is to heat the configured simulated gas. Specifically, the specific heating temperature can be adjusted according to different performance evaluation reaction types, which are temperatures well known to those skilled in the art. In a preferred embodiment, the gas heating system 2 includes a shell, which includes a heating zone 203 and an air inlet zone 202 from top to bottom, and a first inert bed material is arranged inside the heating zone 203. The first inert bed material heats the incoming simulated gas, and the heat transfer efficiency is high, which is conducive to saving energy consumption.

[0040] More preferably, if Figure 1As shown, the outlet of the feeding system 3 is also connected to the heating zone 203, and the feeding system 3 is used to supply the powdered activated coke after desulfurization, and the simulated gas is the decomposition gas of the powdered activated coke after desulfurization, wherein the particle size of the first inert bed material is more than 2.5 times the particle size of the powdered activated coke after desulfurization. Such a setting is suitable for the performance evaluation of the decomposition regeneration of the powdered activated coke after desulfurization, specifically: the simulated decomposition gas enters the heating zone 203 to present a decomposition environment, the powdered activated coke after desulfurization enters the heating zone 203, and heat exchanges with the first inert bed material with a higher temperature, and completes the decomposition reaction at the same time. The purpose of setting the particle size of the first inert bed material to more than 2.5 times the particle size of the powdered activated coke after desulfurization is as follows: the first inert bed material with a larger particle size can form a stable stacking pore, and the powdered activated coke after desulfurization enters, and heat transfer and decomposition regeneration are completed. The decomposition gas produced during the reaction and the decomposition gas simulation gas introduced can be discharged through these stacking pores, which is conducive to the gas-solid separation of the powdered regenerated activated coke and the decomposition gas.

[0041] Further preferably, the gas heating system 2 further comprises a slag discharge device 201, which is connected to the heating zone 203, and the outlet of the slag discharge device 201 extends to the outside of the shell. After the analytical reaction is completed, the powdered regenerated activated coke and the first inert bed material can be discharged through the slag discharge device 201, and then the two can be separated by a vibration separation device. Due to the large difference in particle size, the two are separated more thoroughly. The separated powdered regenerated activated coke is sent to evaluate the regeneration performance.

[0042] The gas-solid separation system 5 can be used to separate the reaction products into gas and solid. The use of multiple dust removal devices arranged in series is beneficial to improving the dust removal effect. Considering the balance between economy and treatment effect, in a preferred embodiment, as shown in FIG. Figure 1 As shown, the gas-solid separation system 5 includes a first dust removal device 502 and a second dust removal device 501 connected in sequence, and the first dust removal device 502 is connected to the outlet of the fluidized bed reaction system 4. More preferably, the first dust removal device 502 is a cyclone dust collector or an inertial dust collector, and the second dust removal device 501 is a ceramic filter or a metal sintered filter.

[0043] In a preferred embodiment, the gas-solid separation system 5 is provided with a gas phase outlet, and the powdered activated coke performance evaluation device further comprises a cooling device 6, which is arranged on the pipeline where the gas phase outlet is located. The cooling device 6 can cool the separated gas product.

[0044] The gas products produced in each reaction process will more or less carry the following sulfur-containing and nitrate-containing substances. In order to reduce environmental pollution, in a preferred embodiment, the cooling device 6 is provided with a cooling gas outlet, and the powdered activated coke performance evaluation device further includes a gas purification system 7, which is connected to the cooling gas outlet. More preferably, the gas purification system 7 includes a desulfurization device 70 and a denitration device 71 connected in sequence, and the desulfurization device 70 is connected to the cooling gas outlet.

[0045] In order to improve the desulfurization efficiency, in a preferred embodiment, the desulfurization device 70 includes, from top to bottom, a first feed bin 705, a desulfurization unit 704, and a first slag discharge unit 703, which are connected in sequence. The first feed bin 705 is used to provide a second inert bed material, shaped activated carbon, shaped activated coke, granular activated carbon, granular activated coke, powdered activated carbon or powdered activated coke. The desulfurization unit 704 is connected to the cooling gas outlet, and the first slag discharge unit 703 is provided with a first cooling coil device 702.

[0046] In order to improve the denitrification efficiency, the denitrification device 71 includes, from top to bottom, a second feed bin 715, a denitrification unit 714, and a second slag discharge unit 713, which are connected in sequence. The second feed bin 715 is used to provide a third inert bed material, shaped activated carbon, shaped activated coke, granular activated carbon, granular activated coke, powdered activated carbon or powdered activated coke. The denitrification unit 714 is connected to the desulfurization unit 704, and a second cooling coil device 712 is provided in the second slag discharge unit 713.

[0047] More preferably, the gas distribution system 1 includes a gas supply unit 102 and a gas mixer 103, the gas supply unit 102 includes an NH3 gas supply device, a N2 gas supply device, an O2 gas supply device, a CO2 gas supply device, a NO gas supply device, a SO2 gas supply device and a water vapor gas supply device; the gas mixer 103 is respectively connected to the NH3 gas supply device, the N2 gas supply device, the O2 gas supply device, the CO2 gas supply device, the NO gas supply device, the SO2 gas supply device and the water vapor gas supply device, and the gas mixer 103 is also provided with a simulated gas outlet, which is connected to the gas heating system 2; the denitration unit 714 is connected to the desulfurization unit 704 through a desulfurization gas delivery pipeline, and the desulfurization gas delivery pipeline is also connected to the gas supply port of the NH3 gas supply device. In this way, the gas distribution system 1 can also provide ammonia for the denitration process, further improving the denitration effect.

[0048] In a preferred embodiment, when the powdered activated coke performance evaluation device is used to evaluate the coke making performance of activated coke, the simulated gas is the simulated gas of coke making flue gas, and the solid reactant is coal powder; when the powdered activated coke performance evaluation device is used to evaluate the desulfurization performance of activated coke, the simulated gas is the simulated gas of sulfur-containing flue gas, and the solid reactant is powdered activated coke; when the powdered activated coke performance evaluation device is used to evaluate the denitrification performance of activated coke, the simulated gas is the simulated gas of nitrate-containing flue gas, and the solid reactant is powdered activated coke; when the powdered activated coke performance evaluation device is used to evaluate the desorption and regeneration performance of activated coke, the simulated gas is the simulated gas of desorption gas, and the solid reactant is powdered activated coke after desulfurization; when the powdered activated coke performance evaluation device is used to evaluate the sulfur making performance of activated coke, the simulated gas includes CO2, SO2 and water vapor, and the solid reactant is powdered activated coke.

[0049] In a preferred embodiment, the first inert bed material is quartz sand and / or ceramic balls. More preferably, the second inert bed material and the third inert bed material are both quartz sand and / or ceramic balls. Quartz sand and ceramic balls will not react with the reaction raw materials or products, can avoid affecting the reaction process, and ensure the accuracy of the evaluation. At the same time, quartz sand has a good heat transfer effect, the stacking pores are relatively stable, and the cost is relatively low.

[0050] Preferably, the above device further comprises an air induction device 8, which is arranged on the gas phase outlet pipeline of the denitration device 71 and is used for inducing air.

[0051] In the specific operation process, the gas heating system 2 adopts but is not limited to electric heating; the heating temperature of the gas heating system 2 is less than or equal to 1200°C; the gas heating system 2 adopts a bubbling fluidized bed direct heating type; the first inert bed material of the gas heating system 2 adopts but is not limited to quartz sand.

[0052] Preferably, the heating pipe section 401 of the fluidized flow reaction system 4 is electrically heated; the temperature of the heating pipe section 401 of the fluidized flow reaction system 4 is less than or equal to 1200° C.; and the gas velocity in the fluidized flow reaction system 4 is greater than or equal to 2 m / s.

[0053] The gas purification system 7 adopts but is not limited to a moving bed gas purification device or a chemical gas purification device. The desulfurization device 70 adopts but is not limited to an electric heating type; the denitration device 71 adopts but is not limited to an electric heating type.

[0054] The following is a further description of the process of using the device of the present invention to evaluate the relevant properties of powdered activated coke by using examples:

[0055] Example 1

[0056] The entrained flow coking process for evaluating powdered activated coke is as follows:

[0057] (1) Basic conditions setting

[0058] The gas distribution system 1 is configured with simulated flue gas, and the flue gas components mainly include N2, O2, CO2, NO, SO2, and water vapor;

[0059] The gas heating system 2 uses electric heating, the heating temperature is 1100°C, and quartz sand is used as the first inert bed material with a particle size of 1 mm;

[0060] Feeding system 3 uses a micro-feeder to quantitatively convey coal powder, and the average particle size of the coal powder is 75-80μm;

[0061] The entrained-bed reaction system 4 adopts a tubular reactor structure with segmented heating. The heating pipe section 401 adopts electric heating. The heating temperature can adopt a single heating method or a step-by-step heating method (i.e., the temperature of each heating pipe section is different). This embodiment adopts a single heating method with a temperature of 850-1000° C.

[0062] The simulated flue gas flow velocity in the entrained bed reaction system 4 is 3.5-5.0 m / s;

[0063] The second dust removal device 501 of the gas-solid separation system 5 adopts a water-cooled cyclone dust collector, and the pre-dust removal simultaneously realizes the cooling of the gas and the coke powder, and the first dust removal device 502 adopts a high-temperature resistant ceramic filter.

[0064] (2) Coal powder coking process

[0065] Start the gas heating system 2 and the heating pipe section 401 of the fluidized bed reaction system 4 to raise the temperature to the corresponding set temperature;

[0066] The gas distribution system 1 configures simulated flue gas according to the flue gas composition and proportion; after entering the gas heating system 2, the simulated flue gas is heated to 1000-1100°C and then enters the fluidized bed reaction system 4. After the simulated flue gas flows and the temperature in the fluidized bed reaction system 4 is stabilized, the feeding system 3 begins to stably feed the pulverized coal. The pulverized coal undergoes carbonization and activation to form a coking reaction in the simulated flue gas environment, forming powdered activated coke with a certain pore structure, which is finally collected by the gas-solid separation system 5.

[0067] The powdered activated coke at different positions of the entrained-bed reaction system 4 can be collected by an isokinetic sampling method. The collected powdered activated coke samples are uniformly subjected to physical and chemical analysis by a professional organization.

[0068] Example 2

[0069] The entrained flow desulfurization process of powdered activated coke was evaluated as follows:

[0070] (1) Basic conditions setting

[0071] The gas distribution system 1 is configured with simulated flue gas after dust removal and desulfurization, and the flue gas components mainly include N2, O2, CO2, NO, SO2, and water vapor;

[0072] The gas heating system 2 uses electric heating at a heating temperature of 110°C and uses quartz sand as the first inert bed material with a particle size of 1 mm;

[0073] Feeding system 3 uses a micro-feeder to quantitatively convey powdered activated coke, and the average particle size of the coke powder is 75-80 μm;

[0074] The heating pipe section 401 of the entrained-bed reaction system 4 adopts electric heating, and the heating temperature can adopt a single heating method, and the temperature is 65-80°C;

[0075] The simulated flue gas flow velocity in the entrained-bed reaction system 4 is 4.0 to 6.0 m / s;

[0076] The second dust removal device 501 of the gas-solid separation system 5 adopts a cyclone dust collector, and the first dust removal device 502 adopts a ceramic filter.

[0077] (2) Powdered activated coke desulfurization process

[0078] Start the gas heating system 2 to raise the temperature to the set temperature;

[0079] The gas distribution system 1 configures simulated flue gas according to the flue gas composition and proportion; after entering the gas heating system 2, the simulated flue gas is heated to 100-110°C and then enters the fluidized bed reaction system 4. After the simulated flue gas flows and the temperature in the fluidized bed reaction system 4 is stabilized, the feeding system 3 starts to stably feed the powdered activated coke, and completes the desulfurization reaction in the fluidized bed reaction system 4, and is finally collected by the gas-solid separation system 5.

[0080] The desulfurized powdered coke at different positions of the entrained-bed reaction system 4 can be collected by isokinetic sampling. The collected powdered activated coke samples are uniformly analyzed by professional institutions for physical and chemical analysis and SO2 adsorption.

[0081] (3) Powdered activated coke cyclic desulfurization process

[0082] After the powdered activated coke in step (2) is collected, it is added to the feeding system 3, and step (2) is repeated to measure the desulfurization capacity of the powdered activated coke after multiple cycles.

[0083] Example 3

[0084] The denitrification process of powdered activated coke under entrained flow state is evaluated as follows:

[0085] (1) Basic conditions setting

[0086] Gas distribution system 1 is configured with flue gas simulated after dust removal and desulfurization of powdered activated coke, the components of which mainly include CO2, NO, and water vapor, and NH3 is injected at the same time;

[0087] The gas heating system 2 uses electric heating at a heating temperature of 110°C and uses quartz sand as the first inert bed material with a particle size of 1 mm;

[0088] Feeding system 3 uses a micro-feeder to quantitatively convey powdered activated coke, and the average particle size of the coke powder is 75-80 μm;

[0089] The heating pipe section 401 of the entrained-bed reaction system 4 adopts electric heating, and the heating temperature can adopt a single heating method, and the temperature is 60-110°C;

[0090] The simulated flue gas flow velocity in the entrained bed reaction system 4 is 3.5-5.0 m / s;

[0091] The second dust removal device 501 of the gas-solid separation system 5 adopts a water-cooled cyclone dust collector, and the first dust removal device 502 adopts a high-temperature resistant ceramic filter.

[0092] (2) Powdered activated coke denitrification process

[0093] Start the gas heating system 2 to raise the temperature to the set temperature;

[0094] The gas distribution system 1 configures simulated analytical gas according to the composition and proportion of the analytical gas; after entering the gas heating system 2, the simulated flue gas is heated to 110°C and then enters the fluidized bed reaction system 4. After the simulated flue gas flow and temperature in the fluidized bed reaction system 4 are stable, the feeding system 3 begins to stably feed powdered activated coke and completes the denitrification (4NO+4NH3+O2=4N2+6H2O) reaction in the reactor. The coke powder is finally collected by the gas-solid separation system 5.

[0095] (3) Powdered activated coke cyclic denitrification process

[0096] After the powdered activated coke in step (2) is collected, it is added to the feeding system 3, and step (2) is repeated to measure the denitrification capacity of the powdered activated coke after multiple cycles.

[0097] Example 4

[0098] The evaluation of the sulfur production process of SO2 reduction of powdered activated coke in an entrained flow state is as follows:

[0099] (1) Basic conditions setting

[0100] Gas distribution system 1 is configured with decomposed gas simulated after decomposition of powdered activated coke, and the decomposed gas components mainly include CO2, SO2, and water vapor;

[0101] The gas heating system 2 uses electric heating, the heating temperature is 800°C, and quartz sand is used as the first inert bed material with a particle size of 1 mm;

[0102] Feeding system 3 uses a micro-feeder to quantitatively convey powdered activated coke, and the average particle size of the coke powder is 75-80 μm;

[0103] The heating pipe section 401 of the fluidized bed reaction system 4 adopts electric heating, and the heating temperature can adopt a single heating method, and the temperature is 700-800°C;

[0104] The simulated flue gas flow velocity in the entrained bed reaction system 4 is 3.5-5.0 m / s;

[0105] The second dust removal device 501 of the gas-solid separation system 5 adopts a water-cooled cyclone dust collector, and the first dust removal device 502 adopts a high-temperature resistant ceramic filter.

[0106] (2) Process of making sulfur from powdered activated coke

[0107] Start the gas heating system 2 to raise the temperature to the set temperature;

[0108] The gas distribution system 1 configures simulated analytical gas according to the composition and proportion of the analytical gas; after entering the gas heating system 2, the simulated flue gas is heated to 700-800°C, and then enters the fluidized bed reaction system 4. After the simulated flue gas flow and temperature in the fluidized bed reaction system 4 are stable, the feeding system 3 begins to stably feed powdered activated coke, and completes the SO2 reduction to sulfur production (C+SO2=CO2+S) reaction in the reactor, and the coke powder is finally collected by the gas-solid separation system 5.

[0109] (3) Powdered activated coke cyclic sulfur production process

[0110] After the powdered activated coke in step (2) is collected, it is added to the feeding system 3, and step (2) is repeated to measure the reduction sulfur production capacity of the powdered activated coke after multiple cycles.

[0111] Example 5

[0112] The analytical regeneration process of the desulfurized powdered activated coke in the gas heating system 2 is evaluated as follows:

[0113] (1) Basic conditions setting

[0114] The gas distribution system 1 is configured with decomposed gas simulated from decomposition of powdered activated coke, and the decomposed gas is used as the fluidizing gas of the gas heating system 2. The components of the decomposed gas mainly include CO2, SO2, and water vapor;

[0115] The gas heating system 2 uses electric heating, the heating temperature is 400-500°C, and quartz sand is used as the first inert bed material with a particle size of 1mm;

[0116] The superficial gas velocity of gas heating system 2 is 0.3 m / s;

[0117] The feeding system 3 uses a micro-feeder to quantitatively transport the desulfurized powdered activated coke, and the average particle size of the desulfurized powdered activated coke is 75-80 μm;

[0118] (2) Powdered activated coke analysis and regeneration process

[0119] Start the gas heating system 2 to raise the temperature to the set temperature;

[0120] The gas distribution system 1 configures simulated analytical gas according to the composition and proportion of analytical gas; after entering the gas heating system 2, the simulated analytical gas is heated to 400-500°C, and after the gas flow and temperature are stable, the feeding system 3 begins to stably feed the desulfurized powdered activated coke, and completes heat transfer with the high-temperature first inert bed material in the heating zone 203 of the gas heating system 2, and an analytical reaction (C+2H2SO4=CO2+2H2O+2SO2) occurs. The gas distribution system is closed, and the mixture of quartz sand and powdered regenerated activated coke is collected after passing through the slag discharge device 201. A vibrating screen can be used to separate the mixture, and the separated powdered activated coke is subjected to physical and chemical analysis.

[0121] Example 6

[0122] The purification process of SO2 in the simulated flue gas or simulated analytical gas in the desulfurization device 70 is evaluated as follows:

[0123] (1) Basic conditions setting

[0124] Gas distribution system 1 is configured to simulate tail flue gas after desulfurization of powdered activated coke, the components of which mainly include N2, O2, CO2, NO, SO2 and water vapor;

[0125] The gas heating system 2 uses electric heating, the heating temperature is 65-120°C, and quartz sand is used as the first inert bed material with a particle size of 1 mm;

[0126] The desulfurization device 70 adopts a moving bed type and is electrically heated at a heating temperature of 65 to 120°C;

[0127] The first feed bin 705 stores shaped activated coke (columnar, 6 mm in diameter, 10 mm in height) as the second inert bed material, and the bed material moves downward at a speed of 0.1 m / s;

[0128] (2) Moving bed shaped activated coke desulfurization process

[0129] Start the gas heating system 2 to raise the temperature to the set temperature;

[0130] The gas distribution system 1 configures simulated flue gas according to the flue gas composition and proportion; the simulated flue gas passes through the gas heating system 2, the fluidized bed reaction system 4, and the gas-solid separation system 5, and then enters the desulfurization device 70 to complete the desulfurization.

[0131] The shaped activated coke enters the desulfurization reaction zone through the first feeding bin 705, and is cooled by the first cooling coil device 702 and then discharged after desulfurization.

[0132] Example 7

[0133] The purification process of NO in the simulated flue gas or simulated analytical gas in the denitrification device 71 is evaluated as follows:

[0134] (1) Basic conditions setting

[0135] Gas distribution system 1 is configured to simulate tail flue gas after desulfurization of powdered activated coke, the components of which mainly include N2, O2, CO2, NO, SO2 and water vapor;

[0136] The gas heating system 2 uses electric heating, the heating temperature is 65-120°C, and quartz sand is used as the first inert bed material with a particle size of 1 mm;

[0137] The denitration device 71 adopts a moving bed type and is electrically heated at a heating temperature of 65 to 120°C;

[0138] The second feed bin 715 stores shaped activated coke (columnar, 6 mm in diameter, 10 mm in height) as the third inert bed material, and the bed material moves downward at a speed of 0.1 m / s;

[0139] (2) Moving bed shaped activated coke denitrification process

[0140] Start the gas heating system 2 to raise the temperature to the set temperature;

[0141] The gas distribution system 1 configures simulated flue gas according to the flue gas composition and proportion; after passing through the gas heating system 2, the fluidized bed reaction system 4, the gas-solid separation system 5, and the desulfurization device 70, a certain amount of NH3 is sprayed into the denitrification device 71, and denitrification is completed.

[0142] The shaped activated coke enters the denitration reaction zone through the second feeding bin 715 and is discharged after the denitration is completed through the second cooling coil device 712.

[0143] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0144] 1) The present invention is applicable to the dynamic evaluation of the comprehensive performance of powdered activated coke, including the performance evaluation of coal powder coking, desulfurization, analytical regeneration, SO2 resource recovery and other processes under the fluidized bed state.

[0145] 2) The comprehensive performance of the powdered activated coke of the present invention includes single-coal coking, blended coal coking, the relationship between SO2 adsorption amount and time of powdered activated coke, the relationship between SO2 adsorption amount and number of cycles, the relationship between desulfurization cycle number and wear, the relationship between SO2 adsorption amount and number of analytical regeneration, SO2 reduction to produce sulfur, coordinated denitrification of activated coke, and the kinetic mechanism of coal powder coking, desulfurization, analytical regeneration, SO2 resource utilization and other processes.

[0146] 3) Preferably, the gas heating system of the present invention adopts a solid heat carrier heating solution, which can ensure direct heating of the simulated gas and achieve rapid heating of the simulated gas.

[0147] 4) Preferably, the fluidized bed reaction system of the present invention adopts a segmented heating reactor system solution, which can truly simulate the temperature distribution at different locations of the industrial device.

[0148] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for evaluating the performance of powdered activated coke, characterized in that: include: A gas distribution system (1) for dispensing simulated gas for coking, desulfurization, denitrification, analytical regeneration or sulfur production of powdered activated coke; A gas heating system (2), connected to the gas distribution system (1), and used for heating the simulated gas; A feeding system (3) is used to provide solid reactant materials for the coking, desulfurization, denitrification, analytical regeneration or sulfur production processes of powdered activated coke; An entrained flow reaction system (4) connected to the outlet of the gas heating system (2) and the outlet of the feeding system (3); as well as A gas-solid separation system (5), wherein the gas-solid separation system (5) is connected to an outlet of the entrained flow reaction system (4); The reactor element in the fluidized bed reaction system (4) is a tubular reactor, the tubular reactor comprising a plurality of heating tube segments (401) and a plurality of light tube segments (402), and the plurality of heating tube segments and the plurality of light tube segments (402) are arranged and connected one by one in an interval; the tubular reactor is a coil reactor, the coil reactor comprising a plurality of straight tube segments and a curved tube segment for connecting two adjacent straight tube segments, wherein the straight tube segment is the heating tube segment (401) and the curved tube segment is the light tube segment (402); Wherein, the gas distribution system (1) comprises: A gas supply unit (102), comprising an NH3 gas supply device, an N2 gas supply device, an O2 gas supply device, a CO2 gas supply device, an NO gas supply device, an SO2 gas supply device and a water vapor gas supply device; A gas mixer (103) is respectively connected to the NH3 gas supply device, the N2 gas supply device, the O2 gas supply device, the CO2 gas supply device, the NO gas supply device, the SO2 gas supply device and the water vapor gas supply device, and the gas mixer (103) is also provided with a simulated gas outlet, and the simulated gas outlet is connected to the gas heating system (2); The gas heating system (2) comprises a shell, which comprises a heating zone (203) and an air inlet zone (202) from top to bottom, and a first inert bed material is arranged inside the heating zone (203); the outlet of the feeding system (3) is also connected to the heating zone (203), and the feeding system (3) is used to supply desulfurized powdered activated coke, and the simulated gas is the desorption gas of the desulfurized powdered activated coke, wherein the particle size of the first inert bed material is more than 2.5 times the particle size of the desulfurized powdered activated coke; the first inert bed material is quartz sand and / or ceramic balls.

2. The powdered activated coke performance evaluation device according to claim 1, characterized in that: The gas heating system (2) further comprises a slag discharge device (201), wherein the slag discharge device (201) is connected to the heating zone (203), and an outlet of the slag discharge device (201) extends to the outside of the shell.

3. The powdered activated coke performance evaluation device according to claim 1, characterized in that: The gas-solid separation system (5) comprises a first dust removal device (502) and a second dust removal device (501) which are connected in sequence, and the first dust removal device (502) is connected to the outlet of the fluidized bed reaction system (4).

4. The powdered activated coke performance evaluation device according to claim 3, characterized in that: The first dust removal device (502) is a cyclone dust collector or an inertial dust collector, and the second dust removal device (501) is a ceramic filter or a metal sintered filter.

5. The powdered activated coke performance evaluation device according to claim 1, characterized in that: The gas-solid separation system (5) is provided with a gas phase outlet, and the powdered activated coke performance evaluation device further comprises a cooling device (6), wherein the cooling device (6) is arranged on the pipeline where the gas phase outlet is located.

6. The powdered activated coke performance evaluation device according to claim 5, characterized in that: The cooling device (6) is provided with a cooling gas outlet, and the powdered activated coke performance evaluation device further comprises a gas purification system (7), and the gas purification system (7) is connected to the cooling gas outlet.

7. The powdered activated coke performance evaluation device according to claim 6, characterized in that: The gas purification system (7) comprises a desulfurization device (70) and a denitrification device (71) connected in sequence, and the desulfurization device (70) is connected to the cooling gas outlet.

8. The powdered activated coke performance evaluation device according to claim 7, characterized in that: The desulfurization device (70) comprises, from top to bottom, a first feed bin (705), a desulfurization unit (704), and a first slag discharge unit (703) which are connected in sequence, wherein the first feed bin (705) is used to provide a second inert bed material, shaped activated carbon, shaped activated coke, granular activated carbon, granular activated coke, powdered activated carbon or powdered activated coke, the desulfurization unit (704) is connected to the cooling gas outlet, and the first slag discharge unit (703) is provided with a first cooling coil device (702).

9. The powdered activated coke performance evaluation device according to claim 8, characterized in that: The denitrification device (71) comprises, from top to bottom, a second feed bin (715), a denitrification unit (714), and a second slag discharge unit (713) which are connected in sequence; the second feed bin (715) is used to provide a third inert bed material, shaped activated carbon, shaped activated coke, granular activated carbon, granular activated coke, powdered activated carbon or powdered activated coke; the denitrification unit (714) is connected to the desulfurization unit (704); and the second slag discharge unit (713) is provided with a second cooling coil device (712).

10. The powdered activated coke performance evaluation device according to claim 9, characterized in that: The denitration unit (714) is connected to the desulfurization unit (704) via a desulfurization gas transmission pipeline, and the desulfurization gas transmission pipeline is also connected to the gas supply port of the NH3 gas supply device.

11. The device for evaluating the performance of powdered activated coke according to claim 1, characterized in that: When the powdered activated coke performance evaluation device is used to evaluate the coking performance of activated coke, the simulated gas is a simulated gas of coking flue gas, and the solid reactant is coal powder; When the powdered activated coke performance evaluation device is used to evaluate the desulfurization performance of activated coke, the simulated gas is a simulated gas of sulfur-containing flue gas, and the solid reactant is powdered activated coke; When the powdered activated coke performance evaluation device is used to evaluate the denitration performance of activated coke, the simulated gas is a simulated gas containing nitrate smoke, and the solid reactant is powdered activated coke; When the powdered activated coke performance evaluation device is used to evaluate the decomposition and regeneration performance of activated coke, the simulated gas is a simulated gas of decomposition gas, and the solid reactant is desulfurized powdered activated coke; When the powdered activated coke performance evaluation device is used to evaluate the performance of sulfur production from activated coke, the simulated gas includes CO2, SO2 and water vapor, and the solid reactant is powdered activated coke.

12. The powdered activated coke performance evaluation device according to claim 9, characterized in that: The second inert bed material and the third inert bed material are both quartz sand and / or ceramic balls.

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