Diesel generator set tail gas closed loop treatment device and system for data center

Abstract

The present application relates to diesel generator set technical field, specifically to a kind of data center with diesel generator set tail gas closed loop processing device and system, comprising: device cylinder, with the tail gas pipeline of diesel generator set intercommunication arrangement;First baffle and partition cover, both are set in the inside of device cylinder, the partition cover is tubular, and one end is fixed on the first baffle, the partition cover is provided with several groups, several groups of partition cover are coaxially arranged, and diameter is different, so that gap cavity is formed between partition cover each other;The present application closed loop processing device, when diesel generator set low load working condition, exhaust displacement is small, reduce the through section area of particle capture filter material, to improve the exhaust gas flow rate through particle capture filter material.

Description

Technical Field

[0001] This invention relates to the field of diesel generator set technology, specifically to a closed-loop exhaust gas treatment device and system for diesel generator sets used in data centers. Background Technology

[0002] The diesel engines in data center power supply diesel generator sets, compared to diesel engines installed in vehicles, exhibit long-term stable peak-valley characteristics. That is, data centers experience prolonged periods of peak or off-peak electricity demand, resulting in diesel engines operating at either high or low loads for extended periods. In contrast, diesel engines in vehicles experience rapid acceleration and deceleration due to changing road conditions, preventing them from maintaining stable high or low loads for extended periods. Therefore, differentiating between high and low load conditions for exhaust treatment of data center diesel generator sets is clearly more beneficial.

[0003] Existing technologies for diesel generator exhaust treatment include particulate filters, especially the metal fiber DPF type commonly used in data centers. Filtration velocity is one of the core parameters determining filtration efficiency. Under low load, the exhaust flow rate decreases significantly, leading to a substantial reduction in inertial impaction efficiency. For carbon soot particles of 0.1-1μm, inertial impaction is the primary capture mechanism. The inertial force of the particles is positively correlated with the airflow velocity; the lower the velocity, the easier it is for particles to circumvent the filter fiber, significantly reducing the probability of them detaching from the streamline and impacting the fiber. When the filtration velocity decreases from 1-2 m / s under rated conditions to 0.2-0.3 m / s under low load, the inertial capture efficiency can decrease by 30%-50%.

[0004] By reducing the filtration cross-sectional area of ​​the particulate filter media, the filtration velocity can be significantly increased while the exhaust flow rate remains unchanged. However, when the diesel generator set is under high load, the exhaust flow rate increases significantly, which can lead to excessive back pressure. Current technology can only prioritize back pressure to ensure that the exhaust back pressure of the particulate filter media under high load does not become too high and thus affect engine operation. Summary of the Invention

[0005] The purpose of this invention is to provide a closed-loop treatment device and system for exhaust gas from diesel generator sets used in data centers. This closed-loop treatment device can dynamically adjust the cross-sectional area of ​​the particulate filter material according to the load of the diesel generator set, so that the cross-sectional area is reduced to ensure the filtration velocity under low load, and the cross-sectional area is increased to avoid excessive exhaust back pressure of the exhaust gas under high load.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a closed-loop exhaust gas treatment device for diesel generator sets used in data centers, for treating the exhaust gas of diesel generator sets, comprising: a device cylinder, connected to the exhaust gas pipeline of the diesel generator set; a first partition and a partition hood, both disposed inside the device cylinder, the partition hood being tubular and one end fixed to the first partition, the partition hood being provided in several groups, the several groups of partition hoods being coaxially arranged and having different diameters, thereby forming gap cavities between the partition hoods; a particulate filter material, installed in the gap cavities formed between the partition hoods; a path control component, disposed at the end of the device cylinder; a distribution groove is provided through the first partition, the distribution groove corresponding to and connected to the gap cavities one by one, the path control component controlling the exhaust gas to enter the gap cavities through the distribution groove.

[0007] The path control component includes:

[0008] The second partition is fixedly installed inside the device cylinder, and is located on the side of the first partition away from the partition cover; the fan wall plate is fixedly installed between the first partition and the second partition, dividing the space between the first partition and the second partition into several fan-shaped cavities, each of which is connected to a distribution groove.

[0009] The side of the second partition away from the first partition cooperates with the end of the device cylinder to form a flue gas chamber, and the exhaust gas of the diesel generator set is connected to the flue gas chamber; a path air hole is opened through the second partition, and the path air hole is connected to the fan-shaped cavity one by one. A sealing plate is provided on one side of the path air hole, and the opening and closing of the path air hole is controlled by the axial movement of the sealing plate.

[0010] The partition cover has an internal interlayer annular cavity filled with a filler material; the thermal conductivity of the filler material increases after compression.

[0011] A telescopic shaft is fixedly installed on the sealing plate, and the other end of the telescopic shaft extends to the outside of the device cylinder. The telescopic shaft and the device cylinder are in sealed contact, and the axial movement of the sealing plate is controlled by the telescopic shaft.

[0012] It also includes an external control coupling and a moving end plate. The moving end plate is fixedly installed at the end of the telescopic shaft. The moving end plate is provided with an annular sleeve, and a secondary shaft is inserted through the annular sleeve. A first convex ring and a second convex ring are fixedly provided on the secondary shaft. The annular sleeve is located between the first convex ring and the second convex ring. A pressure plate is fixedly provided on the second convex ring. The pressure plate applies pressure to the annular sleeve, so that the annular sleeve tends to move towards the first convex ring.

[0013] An outer cover is fixedly installed at the end of the external control coupling, which covers the outside of the secondary shaft. A tension spring is connected between the external control coupling and the second convex ring. The tension spring applies tension to the second convex ring, causing the second convex ring to tend to move towards the external control coupling. A blind hole is opened in the secondary shaft, and a fixed insertion shaft is fixedly installed at the end of the device cylinder. The fixed insertion shaft is inserted into the blind hole for limiting.

[0014] A safety pin is inserted between the outer cover and the second convex ring to lock the outer cover and the second convex ring relative to each other. A pressure-sensitive component is also provided on the outside of the device cylinder. When the pressure in the flue gas chamber is higher than the set value and the path vent is closed, the pressure-sensitive component can remove the safety pin.

[0015] The pressure-sensitive component includes a side wall hole communicating with the flue gas main cavity and a corrugated sleeve communicating with the side wall hole. A locking float is fixedly installed on the corrugated sleeve, and a float track cover is fixedly installed on the outside of the device cylinder. The float track cover limits the locking float. A locking slot is opened on the side of the locking float, and a locking spring is installed in the float track cover. The locking spring is locked in the locking slot. When the pressure in the flue gas main cavity is higher than a set value, the pressure acts on the locking float, pushing the locking float to move, so that the locking spring disengages from the locking slot. A release pin fork plate is fixedly installed on the locking float. When the path vent is closed, the safety pin corresponds to the position of the release pin fork plate.

[0016] A diesel generator set exhaust gas treatment system for data centers includes a closed-loop treatment device, an oxidation catalytic module, a selective catalytic reduction module, and an ammonia escape catalytic module. The exhaust gas from the diesel generator set is treated sequentially through the oxidation catalytic module, the closed-loop treatment device, the selective catalytic reduction module, and the ammonia escape catalytic module. The higher the load of the diesel generator set, the larger the cross-sectional area of ​​the particulate filter material in the closed-loop treatment device should be.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The closed-loop processing device of the present invention, through the structural design of partitioned covers, distribution grooves and path control components, reduces the cross-sectional area of ​​the particulate filter material when the exhaust gas volume is small under low load conditions of the diesel generator set, so as to increase the exhaust gas velocity flowing through the particulate filter material; conversely, when the exhaust gas volume increases under high load conditions of the diesel generator set, the cross-sectional area of ​​the particulate filter material is automatically increased to avoid excessive exhaust back pressure, thereby achieving closed-loop control.

[0019] 2. The present invention divides the particulate capture filter media into a ring-shaped structure through a partitioned cover, which enables the particulate capture filter media to preheat adjacent external or internal particulate capture filter media during operation. This ensures that the particulate capture filter media operates at a high-efficiency temperature when adjacent particulate capture filter media are activated, thereby improving the quality of exhaust gas treatment.

[0020] 3. This invention, through the combination of a sandwiched annular cavity and filler material, can adapt to thermal expansion and compression when the particle capture filter material undergoes thermal expansion, thereby preventing the particle capture filter material from being crushed after thermal expansion. At the same time, the collapse of the sandwiched annular cavity and the compression of the filler material will increase the thermal conductivity of the filler material. This allows the heat transfer effect of the partition cover to be improved when the temperature of the particle capture filter material is low, while the heat transfer effect of the partition cover is improved when the temperature of the particle capture filter material rises. At low temperatures, the particle capture filter material reduces the preheating of adjacent particle capture filter materials, so as to ensure that its own temperature quickly reaches the high-efficiency range.

[0021] 4. The present invention, through the combination of external control coupling, secondary shaft and pressure sensing components, can achieve mechanical protection effect, increase safety redundancy, and prevent excessive back pressure in the closed-loop processing device from affecting the operation of diesel generator set when the sensor or external driver fails, thus avoiding data center power outage accidents. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the installation of the closed-loop processing device of the present invention.

[0023] Figure 2 This is a schematic diagram of the closed-loop processing device of the present invention.

[0024] Figure 3 This is a schematic diagram of the closed-loop processing device of the present invention from another angle.

[0025] Figure 4 This is a top view of the closed-loop processing device of the present invention.

[0026] Figure 5 for Figure 4 Cross-sectional view at point AA.

[0027] Figure 6 for Figure 4 Cross-sectional view at point BB.

[0028] Figure 7 for Figure 4 Cross-sectional view at CC.

[0029] Figure 8 This is a three-dimensional half-sectional view of the closed-loop processing device of the present invention.

[0030] Figure 9 This is a partial three-dimensional half-section view of the closed-loop processing device of the present invention.

[0031] Figure 10 This is a three-dimensional cross-sectional view of the closed-loop processing device of the present invention.

[0032] In the diagram: 1. Device cylinder; 2. First partition; 3. Partition hood; 4. Particle capture filter media; 5. Distribution groove; 6. Second partition; 601. Fan wall plate; 602. Fan-shaped cavity; 603. Flue gas main cavity; 604. Path vent; 605. Sealing plate; 301. Interlayer annular cavity; 302. Filler material; 7. Telescopic shaft; 8. External control coupling; 801. Moving end plate; 802. Annular sleeve; 803. Secondary shaft; 804. 805. First convex ring; 806. Second convex ring; 807. Pressing plate; 808. Outer cover; 809. Tension spring; 810. Blind hole; 811. Fixed insert shaft; 812. Safety pin; 813. Side wall hole; 814. Corrugated sleeve; 815. Locking float; 816. Float track cover; 817. Locking slot; 818. Locking spring; 819. Release pin fork plate; 101. Exhaust gas pipe; 102. Air seal seat sleeve; 103. Shaft sleeve ring. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 10 This invention provides a technical solution: a closed-loop exhaust gas treatment device for diesel generator sets used in data centers, such as... Figure 1 As shown, it is installed in the exhaust pipe of the diesel generator set for treating the exhaust gas of the diesel generator set.

[0035] Example 1:

[0036] Closed-loop processing devices such as Figure 8 As shown, the device consists of a cylindrical body 1, a first baffle 2, a partition hood 3, particulate filter media 4, and a path control assembly. The cylindrical body 1 is connected to the exhaust gas duct of the diesel generator set. Please refer to [link / reference needed]. Figure 8 Exhaust gas pipes 101 are connected to both ends of the device cylinder 1, and the device cylinder 1 is connected in series to the exhaust gas treatment system of the diesel generator set through the exhaust gas pipes 101; the first partition 2 and the partition cover 3 are set inside the device cylinder 1, the partition cover 3 is tubular, and one end of it is fixed on the first partition 2.

[0037] In this embodiment of the invention, the partition cover 3 is provided in three groups, and the partition cover 3 can also be provided in two groups or four groups or other quantities.

[0038] See Figure 8 and Figure 7 As shown, the three-part partitioned covers 3 are coaxially arranged and have different diameters, thus forming gap cavities between the partitioned covers 3; the particle capture filter material 4 is installed in the gap cavities formed between the partitioned covers 3. In this embodiment of the invention, the number of particle capture filter materials 4 corresponds to the number of the three-part partitioned covers 3. When the partitioned covers 3 are set to three groups, the particle capture filter material 4 is set to four groups. The outermost particle capture filter material 4 is located between the partitioned cover 3 and the inner wall of the device cylinder 1, and the innermost particle capture filter material 4 has a cylindrical structure.

[0039] The path control component is located at the end of the device cylinder 1; a distribution groove 5 is provided through the first partition 2, and the distribution groove 5 is connected to the gap cavity one by one. The path control component controls the exhaust gas to enter the gap cavity through the distribution groove 5.

[0040] The path control components include: a second partition 6 and a fan wall panel 601.

[0041] The second partition 6 is welded and fixed inside the device cylinder 1. The second partition 6 is located on the side of the first partition 2 away from the partition cover 3. The fan wall plate 601 is welded and fixed between the first partition 2 and the second partition 6, dividing the space between the first partition 2 and the second partition 6 into several fan-shaped cavities 602. Each fan-shaped cavity 602 is connected to the distribution groove 5 in a one-to-one correspondence.

[0042] The side of the second partition 6 away from the first partition 2 mates with the end of the device cylinder 1 to form a flue gas main chamber 603, into which the exhaust gas from the diesel generator set is connected; a path vent 604 is provided through the second partition 6, and the path vent 604 is connected to the sector cavities 602 one by one. A sealing piece 605 is provided on one side of the path vent 604, and the opening and closing of the path vent 604 is controlled by the axial movement of the sealing piece 605. (See reference here) Figure 9 The location is indicated.

[0043] Example 2:

[0044] Please see Figure 6 and Figure 8 Based on the first embodiment, a sandwiched annular cavity 301 is also provided inside the partition cover 3. The partition cover 3 forms a hollow structure through the setting of the sandwiched annular cavity 301, and the sandwiched annular cavity 301 is filled with filler material 302.

[0045] In this embodiment of the invention, the filler 302 is made of metal wire, specifically nickel-chromium alloy wire or tungsten wire. First, it can withstand temperatures above 500 degrees Celsius, which is far beyond the requirements of nickel-chromium alloy wire or tungsten wire. Second, it is elastic and can elastically return to its original position after being compressed appropriately.

[0046] The specific principle is that when the metal wire is not compressed, it is in a loose state, with few contact points and high thermal resistance. However, when the metal wire is compressed to a certain extent, the number of contact points increases significantly, the thermal resistance decreases, and thus the thermal conductivity increases.

[0047] If cost permits, filler 302 can also use highly elastic three-dimensional graphene, which has a temperature resistance far exceeding 500 degrees Celsius. When uncompressed, its thermal conductivity can be as low as 0.1-1 W / mK, and when compressed, its thermal conductivity can soar to 20-100 W / mK, providing a wider range of adjustment.

[0048] Example 3:

[0049] Based on Embodiment 1, axial movement control of the sealing plate 605 is established. Specifically, a telescopic shaft 7 is fixedly installed on the sealing plate 605, with the other end of the telescopic shaft 7 extending outside the device cylinder 1, and the telescopic shaft 7 and the device cylinder 1 in sealed contact. The axial movement of the sealing plate 605 is controlled by the telescopic shaft 7. Please refer to [link to relevant documentation]. Figure 9 An air seal sleeve 102 is provided at the end of the device cylinder 1. The telescopic shaft 7 passes through the air seal sleeve 102, and the telescopic shaft 7 and the device cylinder 1 are sealed by the air seal sleeve 102. A bushing ring 103 is provided in the air seal sleeve 102. The bushing ring 103 is a metal ring, and its principle is the same as that of the piston ring on the cylinder piston. The bushing ring 103 has an opening, so that the bushing ring 103 can adapt to the thermal expansion and contraction deformation of the telescopic shaft 7. At least two sets of bushing rings 103 are provided, and the openings of the bushing rings 103 in different sets are staggered to achieve the exhaust gas sealing effect in high temperature environment.

[0050] It also includes an external control coupling 8 and a movable end plate 801. The movable end plate 801 is fixedly installed at the end of the telescopic shaft 7. The movable end plate 801 is provided with an annular sleeve 802, and a secondary shaft 803 is inserted through the annular sleeve 802. A first convex ring 804 and a second convex ring 805 are fixedly provided on the secondary shaft 803. The annular sleeve 802 is located between the first convex ring 804 and the second convex ring 805. A pressure plate 806 is fixedly provided on the second convex ring 805. The pressure plate 806 applies pressure to the annular sleeve 802, so that the annular sleeve 802 has a tendency to move towards the first convex ring 804.

[0051] An outer cover 807 is fixedly installed at the end of the external control shaft 8, which covers the outside of the secondary shaft 803. A tension spring 808 is connected between the external control shaft 8 and the second convex ring 805. The tension spring 808 applies tension to the second convex ring 805, causing the second convex ring 805 to tend to move towards the external control shaft 8. A blind hole 809 is opened in the secondary shaft 803. A fixed insertion shaft 810 is fixedly installed at the end of the device cylinder 1, and the fixed insertion shaft 810 is inserted into the blind hole 809 for limiting.

[0052] A safety pin 811 is inserted between the outer cover 807 and the second convex ring 805 to lock the outer cover 807 and the second convex ring 805 relative to each other.

[0053] The device cylinder 1 is also equipped with a pressure-sensitive component. When the pressure in the flue gas chamber 603 is higher than the set value and the path vent 604 is closed, the pressure-sensitive component can remove the safety pin 811.

[0054] The pressure-sensitive component includes a side wall hole 812 that communicates with the flue gas main cavity 603 and a corrugated sleeve 813 that communicates with the side wall hole 812. The corrugated sleeve 813 is made of metal, is resistant to high temperature flue gas, and is statically sealed, so there is no risk of air leakage.

[0055] A locking float plate 814 is fixedly installed on the corrugated sleeve 813. A float plate track cover 815 is fixedly installed on the outside of the device cylinder 1. The locking float plate 814 is limited by the float plate track cover 815. A locking slot 816 is opened on the side of the locking float plate 814. A locking spring 817 is installed in the float plate track cover 815. The locking spring 817 is locked in the locking slot 816. When the pressure in the flue gas chamber 603 is higher than the set value, the pressure acts on the locking float plate 814, pushing the locking float plate 814 to move, so that the locking spring 817 disengages from the locking slot 816. A release pin fork plate 818 is fixedly installed on the locking float plate 814. When the path vent 604 is in the closed state, the safety pin 811 corresponds to the position of the release pin fork plate 818.

[0056] A diesel generator set exhaust gas treatment system for data centers includes a closed-loop treatment device, an oxidation catalytic module, a selective catalytic reduction (SCR) module, and an ammonia escape catalytic module. The exhaust gas from the diesel generator set is sequentially treated through these modules. The oxidation catalytic module is composed of a precious metal catalyst, such as platinum or palladium, which promotes the reaction of CO and HC with oxygen to produce harmless carbon dioxide and water. The closed-loop treatment device captures carbon soot particles in the exhaust gas through physical interception. The SCR module adopts a honeycomb flow-through structure and includes a urea tank, a urea pump, and nozzles. The SCR module injects a reducing agent into the exhaust pipe; urea solution is preferred in this invention. Urea decomposes into ammonia at high temperatures, and the ammonia undergoes a selective chemical reaction with NOx, converting it into harmless nitrogen and water. The ammonia escape catalytic module also adopts a honeycomb flow-through structure and catalytically oxidizes excess ammonia escaping from the SCR module.

[0057] The detailed principles of the oxidation catalysis module, selective catalytic reduction module, and ammonia escape catalysis module will not be elaborated in this invention, as they are existing technologies.

[0058] The exhaust gas generated by the diesel generator is first treated by an oxidation catalytic module, and then enters the flue gas main chamber 603 through the exhaust gas connector 101. Please refer to [link / reference needed]. Figure 8 and Figure 9 As shown, by axial movement of the sealing plate 605, the opening and closing of the path vent 604 is controlled, so that the exhaust gas can enter different fan wall plates 601, and then be filtered by the particle capture filter material 4 at different positions through the distribution groove 5.

[0059] This invention Figure 8 In the example, the partition cover 3 is set in three groups. The three groups of partition covers 3 divide the particulate filter material 4 into four parts. The particulate filter material 4 in the center is cylindrical, and the particulate filter material 4 in the other three parts is tubular. The opening and closing of the path air hole 604 is controlled according to the load of the diesel generator. The greater the load of the diesel generator, the more path air holes 604 are opened, and vice versa. This allows the filtration cross-sectional area of ​​the particulate filter material 4 to change according to the load, avoiding the problem of too low filtration velocity at low load and too high exhaust back pressure at high load.

[0060] The load of a diesel generator can be determined based on the amount of electricity generated or by the speed and torque sensors in the diesel engine, which will not be elaborated upon in this invention.

[0061] For the particulate filter media 4, if only the central particulate filter media 4 is in filtering mode under low load, then when the filtration cross-sectional area is increased, the particulate filter media 4 adjacent to the central position are turned on sequentially. The adjacent particulate filter media 4 are preheated to their optimal state, and can be directly and efficiently filtered when the exhaust gas passes through. This invention divides the particulate filter media 4 into a ring-shaped structure through the partition cover 3, which allows the particulate filter media 4 to preheat the adjacent external or internal particulate filter media 4 during operation. For changes in filtration cross-sectional area, the prior art usually uses multiple sets of particulate traps connected in parallel, and the filtration cross-sectional area is adjusted by adjusting the number of parallel connections. This is a common practice, but it cannot preheat the particulate traps. When the parallel particulate traps are started directly, the filtration effect is poor before the particulate traps reach the optimal operating temperature from the low temperature, affecting the exhaust gas treatment quality. This invention uses a ring-shaped structure to not only preheat the adjacent particulate filter media 4, but also eliminates the need for electric heating, improving energy utilization and making it more energy-efficient.

[0062] The particulate filter media 4 expands at high temperatures and contracts at low temperatures due to thermal expansion and contraction. See [reference needed]. Figure 8 and Figure 7 By setting up the interlayer annular cavity 301 and the filler 302, the particle capture filter material 4 can be squeezed by the interlayer annular cavity 301 when it expands with heat, causing the interlayer annular cavity 301 to collapse and deform, thereby preventing the particle capture filter material 4 from being excessively constrained and crushed when it expands with heat.

[0063] In this invention, the filler 302 increases in density and thermal conductivity after being compressed. When the filler 302 is no longer compressed, it can elastically recover, decreasing in density and thermal conductivity. Therefore, by setting the filler 302, when the particle capture filter material 4 first starts working and before thermal expansion occurs, the overall thermal conductivity of the partition cover 3 is at a relatively low level, allowing the particle capture filter material 4 to heat up more quickly. As the particle capture filter material 4 heats up and expands, it compresses the filler 302, increasing its thermal conductivity. This raises the overall thermal conductivity of the partition cover 3 compared to its original level, allowing the heat from the particle capture filter material 4 to be transferred more efficiently to adjacent particle capture filter materials 4.

[0064] The externally controlled coupling 8 is driven axially via an external telescopic drive device, which can be a cylinder, a hydraulic cylinder, or a linear actuator with a lead screw driven by a motor. Initially, refer to... Figure 9The safety pin 811 is inserted between the outer cover 807 and the second convex ring 805, so that the external control coupling 8 and the secondary shaft 803 are fixed synchronously. When the external control coupling 8 extends or retracts, it drives the secondary shaft 803 to move synchronously. The secondary shaft 803 limits the annular sleeve 802 through the pressure plate 806 and the first convex ring 804, so that the external control coupling 8 and the telescopic shaft 7 move synchronously to achieve axial control of the sealing plate 605.

[0065] To improve safety redundancy and avoid the problem of the path vent 604 not opening or being unable to open after being closed due to the failure of the load monitoring sensor of the external telescopic drive equipment or diesel generator, this invention designs a pressure-sensitive component to cooperate with the external control coupling 8.

[0066] If the vent 604 fails to open or cannot open due to a malfunction, it will cause excessive exhaust back pressure in the diesel engine, which may lead to engine shutdown in severe cases. Obviously, if the diesel generator used in the data center loses power due to engine shutdown, the resulting losses will be enormous.

[0067] When the vent 604 is not open or cannot be opened, causing an increase in exhaust back pressure, the pressure in the flue gas chamber 603 will increase. The maximum design allowable back pressure of the diesel generator set of this invention is 5 kPa, and the pressure-bearing area of ​​the locking float 814 is 0.005 m². When the pressure in the flue gas chamber 603 reaches the maximum design allowable back pressure of 5 kPa, the thrust generated on the locking float 814 is F = 5 kPa × 0.005 m² = 25 N, approximately equal to 2.55 kg thrust. Under this 2.55 kg thrust, see [reference needed]. Figure 5 As shown, the locking float 814 can move upward, and the locking spring 817 disengages from the locking slot 816. By controlling the spring force of the locking spring 817, the locking float 814 can move upward under a thrust of 2.55 kg, and the thrust is sufficient to pull out the safety pin 811.

[0068] See Figure 9 As shown, the safety pin 811 will engage in the release fork plate 818 only when the sealing plate 605 closes the path vent 604. At this time, the locking float plate 814 moves upward, and the safety pin 811 can be pulled out through the release fork plate 818.

[0069] by Figure 9 Taking a medium-angle view as an example, after the safety pin 811 is pulled out, if the external telescopic drive device applies continuous rightward pressure to the external control coupling 8 to keep the sealing plate 605 closed, then the right end of the outer cover 807 will press against the end of the device cylinder 1, preventing the external control coupling 8 from continuing to move to the right. At the same time, under the elastic tension of the tension spring 808, the secondary shaft 803 will move to the left relative to the external control coupling 8, causing the telescopic shaft 7 and the sealing plate 605 to move to the left, forcibly opening the path vent 604 to reduce the exhaust back pressure.

[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A closed-loop exhaust gas treatment device for diesel generator sets used in data centers, for treating the exhaust gas of diesel generator sets, characterized in that... include: The device cylinder is connected to the exhaust pipe of the diesel generator set; The first partition and the partition cover are both set inside the device cylinder. The partition cover is tubular and one end is fixed to the first partition. There are at least two sets of partition covers. Each set of partition covers is coaxially arranged and has a different diameter, so that the partition covers form a gap cavity between each other. The particle capture filter media is installed in the gap cavity formed between the partitioned hoods; The path control component is located at the end of the device cylinder; a distribution groove is provided through the first partition plate, and the distribution groove is connected to the gap cavity one by one. The path control component controls the exhaust gas to enter the gap cavity through the distribution groove.

2. The closed-loop processing device according to claim 1, characterized in that, The path control component includes: The second partition is fixedly installed inside the device cylinder, and the second partition is located on the side of the first partition away from the partition cover; The fan-shaped wall panel is fixedly installed between the first partition and the second partition, dividing the space between the first partition and the second partition into several fan-shaped cavities, each of which is connected to a distribution groove.

3. The closed-loop processing device according to claim 2, characterized in that: The side of the second partition away from the first partition cooperates with the end of the device cylinder to form a flue gas chamber, and the exhaust gas of the diesel generator set is connected to the flue gas chamber; The second partition has through-holes for air passages, which are connected to the fan-shaped cavities one by one. A sealing plate is provided on one side of the air passages, and the opening and closing of the air passages is controlled by the axial movement of the sealing plate.

4. The closed-loop processing device according to claim 1, characterized in that: The partition cover has an internal interlayer annular cavity, which is filled with filler material; The thermal conductivity of the filler increases after it is compressed.

5. The closed-loop processing device according to claim 3, characterized in that: A telescopic shaft is fixedly installed on the sealing plate, and the other end of the telescopic shaft extends to the outside of the device cylinder. The telescopic shaft and the device cylinder are in sealed contact, and the axial movement of the sealing plate is controlled by the telescopic shaft.

6. The closed-loop processing device according to claim 5, characterized in that: It also includes an external control coupling and a moving end plate. The moving end plate is fixedly installed at the end of the telescopic shaft. The moving end plate is provided with an annular sleeve, and a secondary shaft is inserted through the annular sleeve. The secondary shaft is fixedly provided with a first convex ring and a second convex ring, and the annular sleeve is located between the first convex ring and the second convex ring. A pressure plate is fixedly provided on the second convex ring, and the pressure plate applies pressure to the annular sleeve, so that the annular sleeve tends to move towards the first convex ring.

7. The closed-loop processing device according to claim 6, characterized in that: An outer cover is fixedly provided at the end of the external control coupling. The outer cover covers the outside of the secondary shaft. A tension spring is provided between the external control coupling and the second convex ring. The tension spring applies tension to the second convex ring, causing the second convex ring to tend to move towards the external control coupling. A blind hole is provided in the secondary shaft, and a fixed insertion shaft is fixedly provided at the end of the device cylinder. The fixed insertion shaft is inserted into the blind hole for limiting.

8. The closed-loop processing device according to claim 7, characterized in that: A safety pin is inserted between the outer cover and the second convex ring to lock the outer cover and the second convex ring relative to each other. The device is also equipped with a pressure-sensitive component on the outside of the cylinder. When the pressure in the flue gas chamber is higher than the set value and the path vent is closed, the pressure-sensitive component can remove the safety pin.

9. The closed-loop processing device according to claim 8, characterized in that: The pressure-sensitive component includes a side wall hole communicating with the flue gas main cavity and a corrugated sleeve communicating with the side wall hole; A locking float is fixedly installed on the corrugated sleeve, and a float track cover is fixedly installed on the outside of the device cylinder. The locking float is limited by the float track cover. A locking slot is opened on the side of the locking float, and a locking spring is installed in the float track cover. The locking spring is locked in the locking slot. When the pressure in the flue gas chamber is higher than the set value, the pressure acts on the locking float, pushing the locking float to move, so that the locking spring disengages from the locking slot. A release pin fork plate is fixedly installed on the locking float plate. When the path air hole is closed, the safety pin corresponds to the position of the release pin fork plate.

10. A diesel generator set exhaust gas treatment system for data centers, characterized in that: The system includes a closed-loop processing device, an oxidation catalysis module, a selective catalytic reduction module, and an ammonia escape catalysis module as described in any one of claims 1-9; The exhaust gas from the diesel generator set is processed sequentially through an oxidation catalytic module, a closed-loop treatment device, a selective catalytic reduction module, and an ammonia escape catalytic module. The higher the load on the diesel generator set, the larger the cross-sectional area of ​​the particulate filter media in the closed-loop control system.

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