Waste heat recovery equipment for ammonia gas turbine

Abstract

The invention relates to the technical field of gas turbines, in particular to waste heat recovery equipment for an ammonia gas turbine, which comprises a heat exchange box, the heat exchange box is connected with a smoke exhaust pipeline of the ammonia gas turbine through a connecting pipe, at least two mounting plates are arranged in the heat exchange box at equal intervals, and gaps for smoke to pass through are arranged between the mounting plates and the inner wall of the heat exchange box. Gaps between the adjacent mounting plates and heat exchange boxes are arranged in a staggered mode, partition plates are rotationally arranged on the mounting plates, and turnover devices used for controlling the partition plates to rotate are further arranged on the mounting plates; when the partition plate is flush with the mounting plate, the partition plate is in close fit with the mounting plate, smoke cannot pass through the mounting plate, and the partition plate is controlled to rotate along with the turnover device, so that the heat exchange box has a long flue state and a short flue state. The function of adjusting the length of the flue in the heat exchange box is achieved, the effect of adjusting the flue gas heat exchange efficiency is achieved, and the problem that existing waste heat recovery equipment cannot be adjusted according to flue gas temperature fluctuation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbines, and in particular to a waste heat recovery device for an ammonia gas turbine. Background Art

[0002] During the operation of a gas turbine, the temperature of the flue gas generated by the combustion of gas is usually above 500°C, and about 1 / 3 of the energy is discharged into the atmosphere in the form of waste heat. Most of the existing waste heat recovery devices transfer the heat in the flue gas to water, which evaporates and enters the steam turbine to expand and do work, forming a gas-steam combined cycle for power generation. However, the existing waste heat recovery equipment has a low utilization rate of waste heat and still has a large amount of heat loss.

[0003] To this end, Chinese patent application CN115750090A discloses a trigeneration system and working method based on deep recovery of gas turbine waste heat, in which the gas turbine waste heat first drives the supercritical carbon dioxide cycle to generate electricity, and then provides heat and desalination of seawater, thereby realizing the cascade utilization of energy. Through the distribution of energy grades, the exhaust waste heat is deeply and efficiently recovered; while increasing the power generation by coupling the supercritical carbon dioxide cycle, it also increases the heat and water supply, bringing higher economic benefits and significantly improving the overall economic efficiency.

[0004] However, although the existing equipment has achieved a cascade utilization of energy, the flue gas temperature of the gas turbine will fluctuate with the use time and the use environment, and the ammonia-blended gas turbine uses a new type of ammonia fuel to reduce carbon emissions. This new gas turbine technology will cause the exhaust temperature to change compared to the exhaust temperature of the traditional gas turbine. When the flue gas temperature changes, the existing waste heat recovery equipment cannot be adjusted accordingly, which has a serious impact on the utilization of waste heat. Summary of the invention

[0005] In view of the above problems, a waste heat recovery device for an ammonia gas turbine is provided, which solves the problem that the existing waste heat recovery equipment cannot be adjusted according to the flue gas temperature fluctuations through a heat exchange box, a mounting plate, a partition and a flip device.

[0006] In order to solve the problems of the prior art, the present invention provides a waste heat recovery device for an ammonia gas turbine, comprising a heat exchange box, which is connected to the exhaust pipe of the ammonia gas turbine through a connecting pipe, and at least two mounting plates are arranged at equal intervals in the heat exchange box, and there is a gap for flue gas to pass through between the mounting plate and the inner wall of the heat exchange box, and the gaps between adjacent mounting plates and the heat exchange box are staggered. A partition is rotatably arranged on the mounting plate, and a flip device for controlling the rotation of the partition is also provided on the mounting plate; when the partition is flush with the mounting plate, the partition is tightly matched with the mounting plate, and the flue gas cannot pass through the mounting plate. As the flip device controls the rotation of the partition, the heat exchange box has a long flue state and a short flue state.

[0007] Preferably, each partition is connected to a rotating shaft, which is rotatably connected to the mounting plate. The flipping device includes a synchronous transmission assembly and a swing assembly. Multiple rotating shafts on the same mounting plate are synchronously connected through the synchronous transmission assembly, and the swing assembly is used to control the swing of one of the rotating shafts.

[0008] Preferably, a temperature sensing component is provided on the mounting plate. In the working state, the temperature sensing component drives the swing component when it senses that the temperature rises to a specified value. The swing component drives the shaft to rotate, and the shaft drives the partition to rotate so that the partition is flush with the mounting plate.

[0009] Preferably, the swing assembly includes a swing rod, a connecting shaft, a push frame and an elastic member. The swing rod is sleeved on the connecting rod, the connecting shaft is connected to the swing rod, the push frame is movably arranged in the heat exchange box, a linear guide rail is provided on the push frame, the connecting shaft is slidably matched with the linear guide rail, and the two ends of the elastic member are respectively connected to the push frame and the inner wall of the heat exchange box.

[0010] Preferably, a fixing block is installed on the mounting frame, an arc-shaped guide rail is provided on the fixing block, and the connecting shaft is slidably matched with the arc-shaped guide rail.

[0011] Preferably, the temperature sensing component includes a cylinder and a piston rod, the cylinder is mounted on a mounting plate and is filled with an inert gas, the piston rod is slidably mounted in the cylinder, and one end of the piston rod away from the cylinder is connected to the push frame.

[0012] Preferably, an air pressure sensor for detecting air pressure is provided in the heat exchange box, and a linear drive for driving the push frame to move is provided on the heat exchange box.

[0013] Preferably, the synchronous transmission assembly includes a connecting rod and a transmission rod, a plurality of connecting rods are provided and they correspond one to one with the partitions, one end of the connecting rod is sleeved on the rotating shaft, and the other end of the connecting rod is hinged to the transmission rod.

[0014] Preferably, the synchronous transmission assembly includes a pulley and a synchronous belt, the pulley is sleeved on the rotating shaft, and the pulleys on adjacent rotating shafts are connected by the synchronous belt.

[0015] Preferably, the heat exchange box is provided with an observation window for observing the internal state of the heat exchange box.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention realizes the function of adjusting the flue length in the heat exchange box through the heat exchange box, the mounting plate, the partition and the turning device, thereby achieving the effect of adjusting the flue gas heat exchange efficiency and solving the problem that the existing waste heat recovery equipment cannot be adjusted according to the flue gas temperature fluctuation.

[0018] 2. The present invention realizes the function of sensing the temperature at the mounting plate through the temperature sensing component, so as to achieve the effect of automatically driving the partition to flip according to the change of smoke temperature.

[0019] 3. The present invention realizes the function of improving the rotation stability of the swing arm through the fixed block and the arc guide rail, and at the same time achieves the effect of limiting the swing angle of the swing arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a waste heat recovery device for an ammonia gas turbine.

[0021] Figure 2 The present invention is a three-dimensional schematic diagram of the internal structure of a heat exchange box in a waste heat recovery device for an ammonia gas turbine.

[0022] Figure 3 The present invention is a cross-sectional schematic diagram of a heat exchange box in a waste heat recovery device for an ammonia gas turbine.

[0023] Figure 4 The invention is a three-dimensional schematic diagram of a mounting frame in a waste heat recovery device for an ammonia gas turbine when the partition is in a vertical state.

[0024] Figure 5 The present invention is a three-dimensional schematic diagram of a first embodiment of a baffle and a turning device in a waste heat recovery device for an ammonia gas turbine.

[0025] Figure 6 yes Figure 5 A local enlarged schematic diagram of point A in the middle.

[0026] Figure 7 yes Figure 5 A local enlarged schematic diagram of point B in the middle.

[0027] Figure 8 It is a three-dimensional schematic diagram of a swing assembly in a waste heat recovery device for an ammonia gas turbine.

[0028] Fig. 9 The present invention is a three-dimensional schematic diagram of a temperature sensing component and a linear drive in a waste heat recovery device for an ammonia gas turbine.

[0029] Fig.10 The present invention is a three-dimensional schematic diagram of a second embodiment of a synchronous transmission assembly in a waste heat recovery device for an ammonia gas turbine.

[0030] The numbers in the figure are: 1-heat exchange box; 11-mounting plate; 111-partition; 112-rotating shaft; 12-linear drive; 13-observation window; 2-flipping device; 21-synchronous transmission assembly; 211-connecting rod; 212-transmission rod; 213-pulley; 214-synchronous belt; 22-swing assembly; 221-swing rod; 222-connecting shaft; 223-push frame; 22231-linear guide rail; 224-elastic member; 225-fixed block; 2251-arc guide rail; 23-temperature sensing assembly; 231-cylinder; 232-piston rod; 3-ammonia gas turbine; 31-connecting pipe. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figure 1-Figure 3 A waste heat recovery device for an ammonia gas turbine comprises a heat exchange box 1, which is connected to the exhaust pipe of the ammonia gas turbine 3 through a connecting pipe 31. At least two mounting plates 11 are arranged at equal intervals in the heat exchange box 1. There is a gap between the mounting plate 11 and the inner wall of the heat exchange box 1 for the flue gas to pass through. The gaps between adjacent mounting plates 11 and the heat exchange box 1 are arranged alternately. A partition 111 is rotatably arranged on the mounting plate 11, and a flip device 2 for controlling the rotation of the partition 111 is also provided on the mounting plate 11; when the partition 111 is flush with the mounting plate 11, the partition 111 is tightly matched with the mounting plate 11, and the flue gas cannot pass through the mounting plate 11. As the flip device 2 controls the rotation of the partition 111, the heat exchange box 1 has a long flue state and a short flue state.

[0033] The present invention realizes the function of adjusting the flue length in the heat exchange box 1 through the heat exchange box 1, the mounting plate 11, the partition 111 and the turning device 2, thereby achieving the effect of adjusting the flue gas heat exchange efficiency, and solving the problem that the existing waste heat recovery equipment cannot be adjusted according to the flue gas temperature fluctuation. The mounting plate 11 is connected to the water in the steam engine, and the mounting plate 11 is preferably made of copper or ceramic material with high thermal conductivity. The waste heat utilization rate can be improved to a certain extent by extending the flue gas movement path. Extending the flue gas movement path in the heat exchanger means that the contact time between the flue gas and the mounting plate 11 is increased. In this way, more heat has enough time to be transferred from the flue gas to the heat exchange plate, thereby improving the waste heat recovery efficiency. During the processing, when the flue gas temperature is high, the operator controls the partition 111 to rotate through the flip device 2 until the partition 111 is flush with the mounting plate 11. At this time, the partition 111 and the mounting plate 11 are tightly matched, and the flue gas cannot pass through the mounting plate 11, so that the flue gas passes through the mounting plate 11 from the gap between the mounting plate 11 and the inner wall of the heat exchange box 1. The blocking of the mounting plate 11 prolongs the movement path of the flue gas, increases the contact time between the flue gas and the mounting plate 11, and thus improves the utilization rate of the flue gas heat. When the flue gas temperature drops, when the long flue state is used again, the mounting plate 11 located behind the flue cannot effectively utilize the heat of the flue gas. For this reason, the partition 111 is controlled to rotate through the flip device 2, and the flue gas passes directly through the mounting plate 11 through the partition 111 to ensure that the mounting plate 11 and the flue gas can exchange heat efficiently.

[0034] Reference Figure 2-Figure 4 : Each partition 111 is connected to a rotating shaft 112, and the rotating shaft 112 is rotatably connected to the mounting plate 11. The flipping device 2 includes a synchronous transmission component 21 and a swing component 22. Multiple rotating shafts 112 on the same mounting plate 11 are synchronously connected through the synchronous transmission component 21, and the swing component 22 is used to control the swing of one of the rotating shafts 112.

[0035] The present invention realizes the function of controlling the swing of the partition 111 through the rotating shaft 112, the synchronous transmission component 21 and the swing component 22. In the treatment scenario of high-temperature flue gas, in order to significantly improve the heat exchange efficiency and maximize the recovery and utilization of flue gas heat, the operator uses the flexible mechanism of the swing component 22 to drive the rotating shaft 112 to swing through precise control. This rotating shaft 112, as the core power source, realizes a close linkage with multiple driven rotating shafts 112 through the synchronous transmission component 21, ensuring that all rotating shafts 112 can rotate synchronously and coordinately. With the rotation of the rotating shaft 112, the partition 111, a key component, is driven to rotate flexibly. Under the precise control of the operator, the partition 111 is gradually adjusted to a state completely parallel to the mounting plate 11, so that the heat exchange box 1 enters a long flue state. In this mode, the flue gas can flow in a longer path and have more sufficient contact and heat exchange with the mounting plate 11. Compared with the traditional short flue design, the long flue mode significantly prolongs the residence time of the flue gas and increases the heat exchange area, thereby greatly improving the heat transfer efficiency and utilization rate. In addition, this design also has excellent flexibility and adaptability, and can quickly adjust the position of the baffle 111 according to actual needs to meet the heat exchange requirements under different working conditions. Whether it is to increase the flue gas treatment capacity or optimize the heat recovery efficiency, precise control can be achieved through simple operations, providing a strong guarantee for the efficient and stable operation of the entire system. In summary, this efficient heat exchange technology that drives the shaft 112 through the swing component 22 and then drives the baffle 111 to adjust the flue state not only demonstrates the modern industry's profound understanding and innovative application of heat recovery technology, but also contributes to improving energy utilization efficiency and promoting the realization of energy conservation and emission reduction goals.

[0036] Reference Figure 2 and Figure 4 : A temperature sensing component 23 is provided on the mounting plate 11. In the working state, the temperature sensing component 23 drives the swing component 22 when it senses that the temperature rises to a specified value. The swing component 22 drives the rotating shaft 112 to rotate, and the rotating shaft 112 drives the partition 111 to rotate, so that the partition 111 is flush with the mounting plate 11.

[0037] The present invention realizes the function of sensing the temperature at the mounting plate 11 through the temperature sensing component 23, and achieves the effect of automatically driving the partition 111 to flip according to the change of flue gas temperature. When the flue gas temperature rises, the temperature sensing component 23 senses the temperature rise, and when the temperature rises to a specified value, the temperature sensing component 23 drives the swing component 22, and then drives one of the rotating shafts 112 to swing through the swing component 22. The rotating shaft 112 drives multiple rotating shafts 112 to rotate synchronously through the synchronous transmission component 21, and then drives the partition 111 to rotate through the rotating shaft 112 until the partition 111 is flush with the mounting plate 11, and efficient heat exchange is performed through the long flue state, thereby improving the heat utilization rate of the flue gas. The temperature sensing component 23 achieves the effect of automatically adjusting the flipping of the partition 111, further improving the efficiency of the state switching of the partition 111, and improving the response rate of the equipment according to the flue gas temperature.

[0038] Reference Figure 5-Figure 8 : The swing assembly 22 includes a swing rod 221, a connecting shaft 222, a push frame 223 and an elastic member 224. The swing rod 221 is sleeved on the connecting rod 211, the connecting shaft 222 is connected to the swing rod 221, the push frame 223 is movably arranged in the heat exchange box 1, a linear guide rail 22231 is opened on the push frame 223, the connecting shaft 222 is slidably matched with the linear guide rail 22231, and the two ends of the elastic member 224 are respectively connected to the push frame 223 and the inner wall of the heat exchange box 1.

[0039] The present invention realizes the function of driving the connecting shaft 222 to swing through the swing rod 221, the connecting shaft 222, the push frame 223 and the elastic member 224. When the smoke temperature rises, the temperature sensing component 23 senses the temperature rise, and when the temperature rises to a specified value, the temperature sensing component 23 overcomes the elastic force of the elastic key to drive the push frame 223 to move, and the push frame 223 pushes the connecting shaft 222 to move, and then drives the swing rod 221 and the rotating shaft 112 to swing through the connecting shaft 222, and the rotating shaft 112 drives multiple rotating shafts 112 to rotate synchronously through the synchronous transmission component 21, and then drives the partition 111 to rotate through the rotating shaft 112 until the partition 111 is flush with the mounting plate 11.

[0040] Reference Figure 5-Figure 8 A fixing block 225 is installed on the mounting frame, and an arc guide rail 2251 is provided on the fixing block 225, and the connecting shaft 222 is slidably matched with the arc guide rail 2251.

[0041] The present invention realizes the function of improving the rotation stability of the swing rod 221 through the fixed block 225 and the arc guide rail 2251, and at the same time achieves the effect of limiting the swing angle of the swing rod 221. The linear guide rail 22231, with its high-precision guiding property and stable bearing capacity, provides a basis for the linear movement of the push frame 223. When the power source drives the push frame 223 to slide along the linear guide rail 22231, its motion trajectory is strictly limited, ensuring that the push frame 223 will not deviate or shake when pushing the swing rod 221, thereby ensuring the stability of the rotation of the swing rod 221. At the same time, the arc guide rail 2251 is cleverly installed on the fixed block 225, and cooperates with the connecting shaft 222 (the shaft connects the swing rod 221 and the push frame 223). The contour of the arc guide rail 2251 is accurately calculated, and its curvature perfectly matches the 90° flip angle required by the partition 111. When the push frame 223 pushes the swing rod 221, the connecting shaft 222 rotates along the track of the arc guide rail 2251, thereby driving the swing rod 221 and the partition 111 to complete an accurate 90° flip. This design not only simplifies the transmission structure, but also avoids damage or jamming of the partition 111 due to excessive flipping.

[0042] Reference Figure 4 and Fig. 9 The temperature sensing component 23 includes a cylinder 231 and a piston rod 232. The cylinder 231 is installed on the mounting plate 11 and is filled with an inert gas. The piston rod 232 is slidably installed in the cylinder 231. The end of the piston rod 232 away from the cylinder 231 is connected to the push frame 223.

[0043] The present invention realizes the function of sensing the temperature on the mounting plate 11 through the cylinder 231 and the piston rod 232. Since the cylinder 231 is filled with inert gas, as the temperature of the mounting plate 11 increases, the inert gas in the cylinder 231 expands, thereby pushing the piston rod 232 to extend, and the piston rod 232 overcomes the elastic force of the elastic member 224 to drive the push frame 223 to move, and the push frame 223 pushes the connecting shaft 222 and the swing rod 221 to rotate, and then drives the rotating shaft 112 and the partition 111 to rotate through the swing rod 221, and the rotating shaft 112 drives the other rotating shafts 112 to rotate synchronously through the synchronous transmission assembly 21, thereby achieving the effect of controlling the synchronous flipping of multiple partitions 111.

[0044] Reference Figure 4 and Figure 5 : An air pressure sensor for detecting air pressure is provided in the heat exchange box 1, and a linear drive 12 for driving the push frame 223 to move is provided on the heat exchange box 1.

[0045] The present invention realizes the function of actively driving the partition plate 111 to flip through the air pressure sensor and the linear driver 12 . The air pressure sensor is not shown in the figure. The linear drive 12 is preferably an electric push rod or a hydraulic rod. The heat exchanger 1 is provided with a controller for human-computer interaction. The linear drive 12 and the air pressure sensor are electrically connected to the controller. Although the exhaust gas movement path of the rod can improve the waste heat utilization rate of the exhaust gas by flipping the partition 111, under abnormal circumstances, extending the exhaust gas movement path may cause the exhaust gas to be blocked, and in severe cases, the exhaust gas backflow may occur. For this reason, an air pressure sensor is arranged in the heat exchanger 1. The air pressure in the heat exchanger 1 is detected in real time by the air pressure sensor. When the air pressure rises to a specified value, a feedback signal is given to the controller. The controller sends a signal to the linear drive 12. After receiving the signal, the linear drive 12 overcomes the air pressure resistance of the cylinder 231 to drive the push frame 223 to move, and then drives the partition 111 to rotate through the push frame 223, so that the partition 111 rotates to a vertical state, so that the long flue state in the heat exchanger 1 is converted into a short flue state, so that the flue gas passage rate increases.

[0046] Reference Figure 2 , Figure 4 and Fig.10 The synchronous transmission assembly 21 includes a connecting rod 211 and a transmission rod 212. There are multiple connecting rods 211 and they correspond one to one with the partitions 111. One end of the connecting rod 211 is sleeved on the rotating shaft 112, and the other end of the connecting rod 211 is hinged to the transmission rod 212.

[0047] As the first embodiment of the synchronous transmission component 21, the present invention realizes the function of transmission connection of multiple rotating shafts 112 through connecting rods 211 and transmission rods 212. When a rotating shaft 112 in the system starts to rotate, its power is first transmitted to the connecting rod 211 connected thereto. As a key transmission element, the design of the connecting rod 211 fully considers the continuity and stability of power transmission, ensuring that the power of rotation can be accurately transmitted to subsequent components. As the connecting rod 211 rotates, it cleverly drives the transmission rod 212 to move along a preset path. The transmission rod 212, as a bridge connecting multiple connecting rods 211, is designed to ensure both the effective transmission of power and the coordination of movement between the connecting rods 211. Driven by the transmission rod 212, the remaining connecting rods 211 begin to swing, and this swinging motion is immediately converted into the rotational motion of the rotating shaft 112, thereby driving the partition 111 to rotate. The rotation of the partition 111 directly changes the flue state inside the heat exchange box 1, realizing the precise regulation of the flue gas flow direction, flow rate and heat exchange efficiency. During this process, the close cooperation and coordinated work between the rotating shafts 112, the connecting rods 211 and the transmission rods 212 ensure the efficient operation and stability of the entire transmission system.

[0048] Reference Figure 4 , Figure 5 and Figure 7 The synchronous transmission assembly 21 includes a pulley 213 and a synchronous belt 214 . The pulley 213 is sleeved on the rotating shaft 112 . The pulleys 213 on adjacent rotating shafts 112 are connected via the synchronous belt 214 .

[0049] As a second embodiment of the synchronous transmission component 21, the present invention realizes the function of transmission connection of multiple rotating shafts 112 through pulleys 213 and synchronous belts 214. When a rotating shaft 112 in the system starts to rotate, its power is first transmitted to the pulley 213 directly connected to it. As a transmission medium, the design of the pulley 213 fully considers the stability and efficiency of power transmission, ensuring that the rotational force can be transmitted to the synchronous belt 214 without loss or with low loss. The synchronous belt 214, with its high wear resistance, high tensile strength and good synchronization performance, fits tightly in the groove of the pulley 213, forming a stable transmission relationship. As the synchronous belt 214 moves, it immediately drives the pulleys 213 on the adjacent rotating shafts 112 to start synchronous rotation. In this process, the tooth shape of the synchronous belt 214 perfectly matches the tooth groove of the pulley 213, ensuring the precise synchronization of rotation and avoiding the occurrence of slippage or asynchronism. Through the combination of a series of closely connected pulleys 213 and synchronous belts 214, each shaft 112 in the system is closely connected to form a unified whole.

[0050] Reference Figure 1 and Figure 2 : The heat exchange box 1 is provided with an observation window 13 for observing the internal state of the heat exchange box 1.

[0051] The present invention realizes the function of facilitating the operator to observe the state of the internal partition 111 of the heat exchange box 1 through the observation window 13, so as to facilitate the operator to check whether the partition 111 rotates stably. The operator can intuitively and conveniently observe the real-time working state of the internal partition 111 without disassembling the complex structure or interrupting the operation of the equipment. This function not only realizes the real-time monitoring of the movement state of the partition 111, but also significantly enhances the safety and reliability of the equipment. As a key component in the heat exchange box, the stable operation of the partition 111 is crucial to the heat exchange efficiency and service life of the entire system. However, during long-term continuous operation, due to various factors (such as wear, foreign matter blocking, insufficient lubrication, etc.), the partition 111 may become stuck, rotate unsmoothly, or fail to reach the predetermined position. If these problems are not discovered and handled in time, they will directly affect the heat exchange efficiency and may even cause more serious equipment failures. Therefore, the design of the observation window 13 of the present invention is particularly important. It is made of highly light-transmitting, high-temperature-resistant and corrosion-resistant materials to ensure that good observation effects can be maintained under harsh working conditions. At the same time, the position of the observation window 13 has been carefully calculated and arranged to ensure that the operator can clearly observe every subtle movement of the partition 111, including its rotation speed, rotation trajectory, and whether there is any abnormal obstruction, etc., from the most comfortable viewing angle.

[0052] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A waste heat recovery device for an ammonia gas turbine, comprising a heat exchange box (1), the heat exchange box (1) being connected to an exhaust pipe of an ammonia gas turbine (3) via a connecting pipe (31), characterized in that: At least two mounting plates (11) are arranged at equal intervals in the heat exchange box (1); a gap for smoke to pass through is provided between the mounting plates (11) and the inner wall of the heat exchange box (1); the gaps between adjacent mounting plates (11) and the heat exchange box (1) are arranged in a staggered manner; a partition (111) is rotatably provided on the mounting plate (11); and a flip device (2) for controlling the rotation of the partition (111) is also provided on the mounting plate (11); when the partition (111) is flush with the mounting plate (11), the partition (111) and the mounting plate (11) are tightly matched, and smoke cannot pass through the mounting plate (11); as the flip device (2) controls the rotation of the partition (111), the heat exchange box (1) has a long flue state and a short flue state.

2. The waste heat recovery device for an ammonia gas turbine according to claim 1, characterized in that: Each partition (111) is connected to a rotating shaft (112), and the rotating shaft (112) is rotationally connected to the mounting plate (11). The flip device (2) comprises a synchronous transmission component (21) and a swing component (22). Multiple rotating shafts (112) on the same mounting plate (11) are synchronously connected through the synchronous transmission component (21), and the swing component (22) is used to control the swing of one of the rotating shafts (112).

3. The waste heat recovery device for an ammonia gas turbine according to claim 2, characterized in that: A temperature sensing component (23) is provided on the mounting plate (11). In a working state, when the temperature sensing component (23) senses that the temperature has risen to a specified value, it drives the swing component (22). The swing component (22) drives the rotating shaft (112) to rotate. The rotating shaft (112) drives the partition (111) to rotate, so that the partition (111) is flush with the mounting plate (11).

4. The waste heat recovery device for an ammonia gas turbine according to claim 2, characterized in that: The swing assembly (22) comprises a swing rod (221), a connecting shaft (222), a push frame (223) and an elastic member (224); the swing rod (221) is sleeved on the connecting rod (211); the connecting shaft (222) is connected to the swing rod (221); the push frame (223) is movably arranged in the heat exchange box (1); a linear guide rail (22231) is provided on the push frame (223); the connecting shaft (222) and the linear guide rail (22231) are slidably matched; and two ends of the elastic member (224) are respectively connected to the push frame (223) and the inner wall of the heat exchange box (1).

5. The waste heat recovery device for an ammonia gas turbine according to claim 4, characterized in that: A fixing block (225) is installed on the mounting frame, an arc-shaped guide rail (2251) is provided on the fixing block (225), and the connecting shaft (222) is slidably matched with the arc-shaped guide rail (2251).

6. A waste heat recovery device for an ammonia gas turbine according to any one of claims 3 to 5, characterized in that: The temperature sensing component (23) comprises a cylinder (231) and a piston rod (232). The cylinder (231) is mounted on the mounting plate (11) and is filled with an inert gas. The piston rod (232) is slidably mounted in the cylinder (231). One end of the piston rod (232) away from the cylinder (231) is connected to the push frame (223).

7. A waste heat recovery device for an ammonia gas turbine according to any one of claims 1 to 5, characterized in that: An air pressure sensor for detecting air pressure is arranged inside the heat exchange box (1), and a linear drive (12) for driving the push frame (223) to move is arranged on the heat exchange box (1).

8. The waste heat recovery device for an ammonia gas turbine according to claim 2, characterized in that: The synchronous transmission assembly (21) comprises a connecting rod (211) and a transmission rod (212). A plurality of connecting rods (211) are provided and correspond one to one with the partitions (111). One end of the connecting rod (211) is sleeved on the rotating shaft (112), and the other end of the connecting rod (211) is hinged to the transmission rod (212).

9. The waste heat recovery device for an ammonia gas turbine according to claim 2, characterized in that: The synchronous transmission assembly (21) comprises a pulley (213) and a synchronous belt (214); the pulley (213) is sleeved on the rotating shaft (112); and the pulleys (213) on adjacent rotating shafts (112) are connected via the synchronous belt (214).

10. The waste heat recovery device for an ammonia gas turbine according to claim 1, characterized in that: The heat exchange box (1) is provided with an observation window (13) for observing the internal state of the heat exchange box (1).

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