A system for testing the performance of SO2 fine desulfurizer

Abstract

The present invention relates to a system for detecting the performance of a SO2 fine desulfurizer. The system includes a liquefaction device, a combustion chamber, a cooling tower, a gas mixing tower and a desulfurization tower connected in sequence; the system also includes an air pump, an SO2 storage device, a first sampling port and a second sampling port; the air pump is arranged between the cooling tower and the gas mixing tower; the SO2 storage device is connected to the gas mixing tower; the first sampling port is arranged between the gas mixing tower and the desulfurization tower; the second sampling port and the first sampling port are respectively arranged on both sides of the desulfurization tower. The system can test various properties of the SO2 fine desulfurizer, such as sulfur capacity, removal accuracy, desulfurization efficiency and the bed pressure drop caused by filling the SO2 desulfurizer in the desulfurization tower, and can more comprehensively characterize the comprehensive performance of the SO2 fine desulfurizer.

Description

Technical Field

[0001] The invention belongs to the field of chemical industry, and in particular relates to a system for detecting the performance of a SO2 fine desulfurizing agent. Background Art

[0002] SO2 is the most common sulfur oxide with a pungent smell. SO2 is produced during volcanic eruptions and in many industrial processes. Since coal and oil usually contain sulfur, SO2 is generated when they are burned. When SO2 is dissolved in water, sulfurous acid is formed. If sulfurous acid is further oxidized in the presence of PM2.5, sulfuric acid (the main component of acid rain) will be quickly and efficiently generated. Therefore, SO2 is one of the main pollutants in the atmosphere.

[0003] For this reason, it is extremely necessary to test the performance of SO2 fine desulfurizers. However, the existing equipment is not comprehensive in testing the performance of SO2 fine desulfurizers and further exploration is needed. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a system for detecting the performance of a SO2 fine desulfurizer. The system can test various properties of the SO2 fine desulfurizer, such as sulfur capacity, removal accuracy, desulfurization efficiency, and bed pressure drop caused by filling the SO2 desulfurizer in the desulfurization tower, and can more comprehensively characterize the comprehensive performance of the SO2 fine desulfurizer.

[0005] The scheme of the present invention is to provide a system for detecting the performance of SO2 fine desulfurizer, comprising a liquefaction device, a combustion chamber, a cooling tower, a gas mixing tower and a desulfurization tower connected in sequence; the system also includes an air pump, an SO2 storage device, a first sampling port and a second sampling port; the air pump is arranged between the cooling tower and the gas mixing tower; the SO2 storage device is connected to the gas mixing tower; the first sampling port is arranged between the gas mixing tower and the desulfurization tower; the second sampling port and the first sampling port are respectively arranged on both sides of the desulfurization tower.

[0006] In order to better understand the present invention, the working principle of the system is further explained.

[0007] The liquefaction device stores flammable gases liquefied under high pressure, such as butane. At the beginning of the detection process, the pressure reducing valve is opened to introduce the flammable gas into the combustion chamber. After the combustion is completed in the combustion chamber, H2O and CO2 are generated, and O2 required for combustion is also contained. They enter the cooling tower together for cooling. Among them, H2O is more concentrated at the bottom of the cooling tower in liquid form, and the rest of the gas enters the gas mixing tower through the power provided by the air pump. At this time, the SO2 in the SO2 storage device enters the gas mixing tower through flow adjustment, and the adjustable concentration of SO2 is 100-15000mg / m 3The gas components in the gas mixing tower are CO2, H2O, SO2, and O2; then the mixed gas enters the desulfurization tower, and the mixed gas sample can be taken out from the first sampling port for relevant parameter testing. The SO2 desulfurizer to be tested is placed in the desulfurization tower in advance. After the mixed gas passes through the desulfurization tower, the mixed gas is taken out from the second sampling port for relevant testing. The corresponding performance of the SO2 desulfurizer can be obtained by combining the relevant data.

[0008] The system of the present invention can directly or indirectly test the sulfur capacity of the SO2 desulfurizer, the SO2 removal accuracy, the desulfurization efficiency and the bed pressure drop caused by filling the SO2 desulfurizer in the desulfurization tower. The details are as follows:

[0009] The sulfur capacity is obtained by calculating the actual weight of the SO2 desulfurizer and the amount of SO2 used. Sulfur capacity = SO2 amount ÷ actual weight of the SO2 desulfurizer. If the SO2 storage device is a steel cylinder, the SO2 amount is the difference between the initial weight of the steel cylinder and the final weight of the steel cylinder. The initial weight of the steel cylinder can be directly measured, and the final weight of the steel cylinder is the weight of the steel cylinder when SO2 is detected at the second sampling port.

[0010] SO2 desulfurization accuracy refers to the amount of sulfur dioxide remaining in the flue gas after desulfurization, which is obtained by testing the flue gas after desulfurization.

[0011] Desulfurization efficiency is the result of measuring and calculating the SO2 content before and after desulfurization, and the calculation method is: SO2 concentration before desulfurization - SO2 concentration after desulfurization ÷ SO2 concentration before desulfurization × 100%. Among them, the SO2 concentration before desulfurization is measured from the first sampling port, and the SO2 concentration after desulfurization is measured from the second sampling port.

[0012] The bed pressure drop is the difference in pressure inside the desulfurization tower before and after desulfurization. The size of the fan wind force can be configured based on this parameter, which is one of the important parameters.

[0013] Preferably, the cooling tower comprises a water spray device.

[0014] Preferably, a water outlet pipe is provided at the bottom of the cooling tower, and the water outlet pipe is connected to the collecting tank.

[0015] Preferably, an air pump and a first temperature and pressure measuring device are arranged between the cooling tower and the gas mixing tower.

[0016] Preferably, a first row of condensation ports is provided at the bottom of the gas mixing tower.

[0017] Preferably, a second temperature and pressure measuring device is provided between the gas mixing tower and the desulfurization tower.

[0018] Preferably, the desulfurization tower comprises a first porous structure tower plate, a second porous structure tower plate and a third porous structure tower plate arranged in sequence from top to bottom; the desulfurization tower is connected to a water replenishment device; and the water replenishment device comprises a metering pump.

[0019] Preferably, a second row of condensate outlets is provided at the bottom of the desulfurization tower.

[0020] Preferably, the system for detecting the desulfurization performance of the SO2 fine desulfurizer also includes a heat exchanger, and is arranged on both sides of the second sampling port together with the desulfurization tower; a third row of condensate ports is arranged at the bottom of the heat exchanger and is connected to a flow meter.

[0021] Preferably, a third temperature and pressure measuring device is provided between the desulfurization tower and the heat exchanger.

[0022] The beneficial effects of the present invention are:

[0023] The system for detecting the performance of the SO2 fine desulfurizer described in the present invention can test various properties of the SO2 fine desulfurizer such as sulfur capacity, removal accuracy, desulfurization efficiency and the bed pressure drop caused by filling the SO2 desulfurizer in the desulfurization tower, and can more comprehensively characterize the comprehensive performance of the SO2 fine desulfurizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the system for detecting the performance of the SO2 fine desulfurizer according to the present invention.

[0026] Figure 2 It is a schematic diagram of the internal structure of the desulfurization tower described in the present invention.

[0027] Reference numerals in the figures:

[0028] 1-liquefaction device; 2-combustion chamber; 3-cooling tower; 31-water spray device; 32-water outlet pipe; 33-collecting tank; 34-first temperature and pressure measuring device; 4-gas mixing tower; 41-SO2 storage device; 42-first row of condensate outlets; 43-second temperature and pressure measuring device; 5-desulfurization tower; 51-first porous structure tower plate; 52-second porous structure tower plate; 53-third porous structure tower plate; 54-water replenishment device; 55-metering pump; 56-second row of condensate outlets; 57-third temperature and pressure measuring device; 6-air pump; 7-first sampling port; 8-second sampling port; 9-heat exchanger; 91-third row of condensate outlets; 92-flow meter. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0030] refer to Figure 1 The system for detecting the performance of SO2 fine desulfurizer is characterized in that it includes a liquefaction device 1, a combustion chamber 2, a cooling tower 3, a gas mixing tower 4 and a desulfurization tower 5 connected in sequence; the system also includes an air pump 6, a SO2 storage device 41, a first sampling port 7 and a second sampling port 8; the air pump 6 is arranged between the cooling tower 3 and the gas mixing tower 4; the SO2 storage device 41 is connected to the gas mixing tower 4; the first sampling port 7 is arranged between the gas mixing tower 4 and the desulfurization tower 5; the second sampling port 8 and the first sampling port 7 are respectively arranged on both sides of the desulfurization tower 5.

[0031] refer to Figure 1 As an optional embodiment, the cooling tower 3 includes a water spraying device 31. Spraying with water has a wide cooling coverage and can effectively reduce the temperature of the mixed gas after combustion.

[0032] refer to Figure 1 As an optional embodiment, a water outlet pipe 32 is provided at the bottom of the cooling tower 3, and the water outlet pipe 32 is connected to a collecting tank 33. Water is used for cooling in the cooling tower 3, and the water outlet pipe 32 can be provided to discharge the cooling water in time, and the collecting tank 33 is provided to collect the water in order to reduce the influence on the outside world, which provides convenience for subsequent processing.

[0033] refer to Figure 1As an optional embodiment, a first temperature and pressure measuring device 34 is provided between the cooling tower 3 and the gas mixing tower 4. With such a configuration, the temperature of the gas after cooling can be monitored in real time, and the cooling efficiency of the cooling tower 3 can be adjusted according to the temperature to adapt to subsequent detection; at the same time, the negative pressure of the air pump 6 can also be monitored in real time, and the suction force can be adjusted accordingly. The temperature here is usually maintained at 50-100°C, and the pressure is usually maintained at -3-5kpa.

[0034] refer to Figure 1 As an optional embodiment, a first row of condensation ports 42 is provided at the bottom of the gas mixing tower 4. With such a configuration, the condensed water in the gas mixing tower 4 can be discharged after the test is completed.

[0035] refer to Figure 1 As an optional embodiment, a second temperature and pressure measuring device 43 is provided between the gas mixing tower 4 and the desulfurization tower 5. With such a configuration, the temperature of the gas after mixing with SO2 can be monitored in real time; at the same time, the pressure before desulfurization can also be monitored to provide data for measuring the pressure drop of the desulfurization agent bed. The temperature here is usually maintained at 45-95°C, and the pressure is usually maintained at 8-10kpa.

[0036] refer to Figure 1 and Figure 2 As an optional embodiment, the desulfurization tower 5 includes a first porous structure tray 51, a second porous structure tray 52 and a third porous structure tray 53 arranged in sequence from top to bottom; the desulfurization tower 5 is connected to a water replenishment device 54; the water replenishment device 54 includes a metering pump 55. In this way, the desulfurization agent to be tested can be loaded between the first porous structure tray 51 and the second porous structure tray 52, and the inert filler can be loaded between the second porous structure tray 52 and the third porous structure tray 53. The water replenishment device 54 and the metering pump 55 are provided, and the required supplementary water can be uniformly distributed through the inert filler according to the determined amount and then enter the desulfurization bed.

[0037] refer to Figure 1 As an optional embodiment, a second condensate outlet 56 is provided at the bottom of the desulfurization tower 5. With such a configuration, the condensed water in the desulfurization tower 5 can be discharged after the test is completed.

[0038] refer to Figure 1As an optional implementation, the system for detecting the performance of the SO2 fine desulfurizer further includes a heat exchanger 9, which is arranged on both sides of the second sampling port 8 together with the desulfurization tower 5; a third row of condensation ports 91 is arranged at the bottom of the heat exchanger 9 and connected to a flow meter 92. With such an arrangement, the mixed gas after the test can be cooled in time, and the condensed water in the heat exchanger 9 can be discharged in time, and the flow meter 92 can be used to test the flue gas flow rate, and the amount of SO2 can be more accurately regulated according to the flue gas flow rate.

[0039] The system of the present invention is now used to test the performance of two SO2 fine desulfurizers (desulfurizer a and desulfurizer b), wherein the sample information, experimental conditions, recorded data and test results are shown in Table 1 and Table 2 respectively.

[0040] The temperature and pressure data measured by I, II and III in Table 1 and Table 2 correspond to the data measured by the first temperature and pressure measuring device 34, the second temperature and pressure measuring device 43 and the third temperature and pressure measuring device 57, respectively.

[0041] Table 1 Desulfurizer a related experimental results

[0042]

[0043]

[0044] Table 2 Desulfurizer b related experimental results

[0045]

[0046]

[0047] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A system for detecting the performance of a SO2 fine desulfurizer, characterized in that: The system comprises a liquefaction device (1), a combustion chamber (2), a cooling tower (3), a gas mixing tower (4) and a desulfurization tower (5) which are connected in sequence; the system also comprises an air pump (6), an SO2 storage device (41), a first sampling port (7) and a second sampling port (8); the air pump (6) is arranged between the cooling tower (3) and the gas mixing tower (4); the SO2 storage device (41) is connected to the gas mixing tower (4); the first sampling port (7) is arranged between the gas mixing tower (4) and the desulfurization tower (5); the second sampling port (8) and the first sampling port (7) are respectively arranged on both sides of the desulfurization tower (5); The cooling tower (3) comprises a water spray device (31); The desulfurization tower (5) comprises a first porous structure tower plate (51), a second porous structure tower plate (52) and a third porous structure tower plate (53) arranged in sequence from top to bottom; the desulfurization tower (5) is connected to a water replenishment device (54); the water replenishment device (54) comprises a metering pump (55).

2. The system for detecting the performance of SO2 fine desulfurization agent according to claim 1 is characterized in that: A water outlet pipe (32) is provided at the bottom of the cooling tower (3), and the water outlet pipe (32) is connected to the collection tank (33).

3. The system for detecting the performance of SO2 fine desulfurization agent according to claim 1 is characterized in that: A first temperature and pressure measuring device (34) is provided between the cooling tower (3) and the gas mixing tower (4).

4. The system for detecting the performance of SO2 fine desulfurization agent according to claim 1 is characterized in that: A first row of condensation ports (42) is provided at the bottom of the gas mixing tower (4).

5. The system for detecting the performance of SO2 fine desulfurization agent according to claim 1 is characterized in that: A second temperature and pressure measuring device (43) is provided between the gas mixing tower (4) and the desulfurization tower (5).

6. The system for detecting the performance of SO2 fine desulfurization agent according to claim 1 is characterized in that: A second row of condensate outlets (56) is provided at the bottom of the desulfurization tower (5).

7. The system for detecting the performance of SO2 fine desulfurization agent according to claim 1 is characterized in that: It also comprises a heat exchanger (9), which is arranged on both sides of the second sampling port (8) together with the desulfurization tower (5); a third row of condensation ports (91) is arranged at the bottom of the heat exchanger (9) and is connected to a flow meter (92).

8. The system for detecting the performance of SO2 fine desulfurization agent according to claim 7 is characterized in that: A third temperature and pressure measuring device (57) is provided between the desulfurization tower (5) and the heat exchanger (9).

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