Marine main engine exhaust gas waste heat recovery device

Abstract

The invention belongs to the technical field of ship waste heat recovery, and particularly relates to a ship main engine waste gas waste heat recovery device which comprises a steam engine unit, a filtering unit and a recovery unit. The steam engine unit comprises a steam engine body, a steam conveying part, a cooling water circulating part and a steam generator; the recycling unit comprises a disturbing assembly, a separating assembly, and an intercepting part and a gas conveying part which are arranged at the top of the disturbing assembly; the filtering unit comprises a filtering assembly connected with the gas conveying part, a ventilation part arranged in the filtering assembly and a gas output part arranged on the side wall of the filtering assembly, the other end of the gas output part is connected with the steam generator, and the bottom of the filtering assembly is connected with the cooling water circulation part. According to the steam engine, through a plurality of components such as the disturbing component, the separating component, the intercepting component and the filtering component, high-temperature steam can be converted into electric energy, the steam engine body can be cooled through recycled water, the operation cost is reduced, and the service life of the steam engine is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat recovery of ships, and particularly to a waste heat recovery device for the exhaust gas of a ship's main engine. Background Art

[0002] Existing ship drive devices are basically diesel engines and steam engines. However, the cooling of diesel engines and steam engines almost all adopts cooling water circulation cooling, resulting in the continuous use of cooling water for cooling. During the normal navigation of a ship, the main engine of the ship will discharge a large amount of waste heat through exhaust. Usually, this waste heat is directly discharged into the atmosphere, wasting a large amount of energy, reducing the energy utilization rate, and also causing a certain degree of environmental pollution.

[0003] Chinese invention patent: Publication number "CN119393775A", titled "An energy-saving waste heat recovery RTO exhaust gas treatment device", discloses an energy-saving waste heat recovery RT0 exhaust gas treatment device. Through the settings of the upper baffle, slide plate and cylinder body, as the liquid level of the cooling water gradually rises, the slide plate moves upward, causing a space to appear between the upper side of the upper baffle and the inner wall of the cylinder body. Since the cylinder body is inclined, the gradually rising liquid level of the cooling water squeezes the air in the cylinder body out. Through this action, the contact area between the cooling water and the heat exchange tube is increased, so that more heat in the purified gas is absorbed by the cooling water, thereby reducing the probability of heat waste. However, in this technical solution, cooling water is used to cool the high-temperature exhaust gas, and this part of the heat is not utilized, resulting in heat waste, thus leading to a low recovery efficiency of the exhaust gas waste heat. Summary of the Invention

[0004] In order to solve the problem of low efficiency of waste heat recovery and utilization of exhaust gas in the above-mentioned existing technologies, the present invention proposes a waste heat recovery device for the exhaust gas of a ship's main engine, aiming to provide a device that can effectively utilize the waste heat of the exhaust gas of the ship's main engine, thereby reducing energy waste.

[0005] The present invention is realized through the following technical solutions: It includes a steam engine unit, a filtering unit, and a recovery unit arranged between the steam engine unit and the filtering unit. The top of the filtering unit is connected to the recovery unit, and the bottom is connected to the steam engine unit; the steam engine unit includes a steam engine body, a steam delivery part, a cooling water circulation part, and a steam generator arranged on the steam engine body; the recovery unit includes a disturbing component connected to the cooling water circulation part at the bottom, a separation component arranged inside the disturbing component, and an intercepting part and a gas delivery part arranged at the top of the disturbing component; the filtering unit includes a filtering component connected to the gas delivery part, a breathable part arranged inside the filtering component, and a gas output part arranged on the side wall of the filtering component. The other end of the gas output part is connected to the steam generator, and the bottom of the filtering component is connected to the cooling water circulation part.

[0006] As a further preference, the disturbing component includes a separation tank, a water storage member disposed at the bottom of the separation tank, and a fixing member disposed above the water storage member. A rotating member is disposed inside the fixing member. A flow disturbing fan is sleeved outside and rotatably connected to the rotating member, and the inside of the rotating member is hollow.

[0007] As a further preference, a guiding block is disposed at one end of the water storage member away from the steam delivery portion.

[0008] As a further preference, the guiding block is inclined in a direction away from the steam delivery portion.

[0009] As a further preference, a filter plate is disposed inside the rotating member.

[0010] As a further preference, the separation component includes a connecting rod, a spiral guiding plate, and an umbrella plate separating member; one end of the connecting rod is connected to the fixing member, and the other end is connected to the spiral guiding plate. The umbrella plate separating member is disposed above the spiral guiding plate and connected to the separation tank.

[0011] As a further preference, the umbrella plate separating member is integrally conical, and the conical surface faces the intercepting portion. A plurality of filter holes are disposed on the conical surface of the umbrella plate separating member, and the diameter of the filter holes is less than 3 mm.

[0012] As a further preference, the intercepting portion includes a fixing ring disposed at the top end inside the separation tank, and a foam-breaking net disposed inside the fixing ring, and the foam-breaking net cooperates with the gas delivery portion.

[0013] As a further preference, the filtering component includes a filtering tank connected to the gas delivery portion, and a filtering ring plate, an activated carbon layer, and a second filtering ring plate sequentially disposed inside the filtering tank from top to bottom. The second filtering ring plate is connected to the separation tank.

[0014] As a further preference, the air-permeable portion includes a first air-permeable cloth and a second air-permeable cloth disposed inside the filtering tank; the first air-permeable cloth is disposed below the second filtering ring plate, and the second air-permeable cloth is disposed below the first air-permeable cloth; the second air-permeable cloth cooperates with the gas output portion.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. By effectively utilizing the waste heat steam generated by the steam engine body, the present invention realizes the efficient conversion and utilization of energy, improves the energy utilization rate and reduces environmental pollution.

[0017] 2. Through multiple components such as disturbing, separating, intercepting, and filtering, the present invention can not only convert high-temperature steam into electric energy, but also cool the steam engine body through the recycled water, reduce the operation cost and extend the equipment life. At the same time, it protects the environment, improves the economic benefit and adaptability, and greatly improves the waste heat recovery and utilization of the steam main engine.

[0018] 3. The present invention solves the problem that the main engine needs continuous cooling water for free circulation, avoiding the direct discharge of waste heat into the atmosphere, which not only wastes a large amount of energy, reduces the energy utilization rate, but also causes a certain degree of environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the recovery device of the present invention.

[0020] Figure 2 It is a schematic side view of the overall structure of the recovery device of the present invention.

[0021] Figure 3 It is an enlarged schematic diagram of the partial structure of the recovery unit of the present invention.

[0022] Figure 4 It is an enlarged schematic diagram of the partial structure of the filtering component of the present invention.

[0023] Figure 5 It is a schematic diagram of the internal structure of the recovery unit of the present invention.

[0024] Figure 6 It is a schematic sectional view of the recovery unit of the present invention.

[0025] Figure 7 It is an enlarged schematic diagram of the partial structure of the filtering component of the present invention.

[0026] Figure 8 It is a schematic diagram of the internal structure of the filtering component of the present invention.

[0027] Figure 9 It is a schematic sectional view of the filtering component of the present invention.

[0028] Figure 10 It is a system flow chart of the recovery device of the present invention.

[0029] Labels in the figure:

[0030] 100, Steam engine unit; 101, Steam engine body; 102, Steam delivery section; 103, Cooling water circulation section; 104, Steam generator; 200, Recovery unit; 201, Disrupting component; 201a, Separation tank; 201b, Water storage part; 201c, Guide block; 201d, Fixing part; 201e, Rotating part; 201f, Filter plate; 201g, Turbulence fan; 202, Separation component; 202a, Connecting rod; 202b, Spiral guide plate; 202c, Umbrella plate separator; 203, Interception section; 203a, Fixed ring; 203b, Demisting screen; 204, Gas delivery section; 300, Filtration unit; 301, Filtration component; 301a, Filtration tank; 301b, First filtration ring plate; 301c, Activated carbon layer; 301d, Second filtration ring plate; 302, Ventilation section; 302a, First ventilation cloth; 302b, Second ventilation cloth; 303, Gas output section. Detailed implementation mode

[0031] The advantages and features of the present invention will be illustrated and explained by the following non - restrictive description of preferred embodiments, which are given only as examples with reference to the accompanying drawings.

[0032] Embodiment 1

[0033] As Figures 1 to 4 shown, this is the first embodiment of the present invention. The present invention provides a waste heat recovery device for a ship's main engine, including: a steam engine unit 100, a recovery unit 200, and a filtration unit 300. The recovery unit 200 is arranged between the steam engine unit 100 and the filtration unit 300 and is used for gas - liquid separation. The liquefied and cooled condensed water flows back to the steam engine unit 100 for continued use; the high - temperature steam after one - step condensation is transported to the filtration unit 300 for filtration and impurity removal. The steam after impurity removal and the condensed water generated during the impurity removal process respectively enter the steam engine unit 100 for power generation. The top of the filtration unit 300 is connected to the recovery unit 200, and the bottom is connected to the steam engine unit 100.

[0034] Among them, the steam engine unit 100 includes a steam engine body 101, a steam delivery part 102, and a cooling water circulation part 103. The steam delivery part 102 is arranged on the steam engine body 101 and is connected to the middle and lower ends of the recovery unit 200. The cooling water circulation part 103 is also arranged on the steam engine body 101 and is connected to the bottom of the recovery unit 200 and the bottom of the filtration unit 300. Different from the steam delivery part 102, the cooling water circulation part 103 is arranged at a relatively lower position on the steam engine body 101 with respect to the steam delivery part 102. When the steam engine body 101 generates waste heat steam, the waste heat steam is transported to the inside of the recovery unit 200 through the steam delivery part 102. The recovery unit 200 performs a gas-liquid separation operation on the steam, so that the steam transported by the steam delivery part 102 is separated into high-temperature gas and condensed water formed by condensation. The high-temperature gas is transported to the inside of the filtration unit 300 for filtration, impurity removal, and purification. The separated and condensed condensed water is collected at the bottom of the recovery, and then transported into the cooling water circulation part 103 circuit and re-transported back into the inside of the steam engine body 101 for cooling the steam engine body 101. The separated water vapor can be recycled and used to cool the steam engine body 101, forming a recovery cooling pipeline, so that the maximum degree of recycling can be carried out, reducing resource waste.

[0035] Such as Figures 3 to 5As shown, the recovery unit 200 includes a disturbing component 201, a separation component 202, an interception part 203, and a gas delivery part 204. The disturbing component 201 is cylindrical as a whole and is the outer shell of the recovery unit 200, which is respectively connected to the steam delivery part 102 and the cooling water circulation part 103. The separation component 202 is arranged inside the disturbing component 201 and is used for gas-liquid separation operation. The interception part 203 is arranged at the top of the disturbing component 201 and is used for intercepting the passing high-temperature gas again to prevent a small amount of water vapor from passing through. The gas delivery part 204 is arranged at the top of the disturbing component 201 and is connected to the top of the filtering unit 300, and is used for delivering the steam after gas-liquid separation to the filtering unit 300 for filtering and impurity removal. The disturbing component 201 penetrates and is connected to the cooling water circulation part 103. After the waste heat steam generated by the steam engine body 101 is delivered to the inside of the disturbing component 201 through the steam delivery part 102, a large amount of waste heat steam impacts inside the disturbing component 201, so that the disturbing component 201 can buffer the incoming steam and at the same time disturb the steam, so that the gas and liquid inside the steam can be better fused together and then move upward together. The separation component 202 includes an umbrella plate separator 202c arranged in the upper middle part of the disturbing component 201. When passing through the separation component 202, the separation component 202 spirally guides the mixed steam and gradually guides it into the inside of the umbrella plate separator 202c. The umbrella plate separator 202c preliminarily intercepts the water vapor in the steam, so that the water can condense at the bottom of the umbrella plate separator 202c, and then the high-temperature gas passes through. And the interception part 203 can intercept the passing high-temperature gas again to prevent a small amount of water vapor from passing through. The intercepted water vapor all drips to the bottom of the disturbing component 201 and flows into the inside of the cooling water circulation part 103, and is re-delivered back to the steam engine body 101 by the cooling water circulation part 103 for cooling the steam engine body 101.

[0036] As Figure 7 and Figure 8As shown, the filtering unit 300 includes a filtering component 301, a breathable part 302, and a gas output part 303. The filtering component 301 is the outer shell of the filtering unit 300 and is connected to the gas delivery part 204. The breathable part 302 is arranged inside the filtering component 301, and the gas output part 303 is arranged on one side of the filtering component 301. The other end of the gas output part 303 is connected to the steam generator 104 of the steam engine unit 100. The gas output part 303 is arranged between the breathable part 302 and the cooling water circulation part 103. The filtering component 301 is penetrated and connected to the cooling water circulation part 103. After the steam is separated by the disturbing component 201, the separating component 202, and the intercepting part 203, the separated high-temperature gas is transported to the inside of the filtering component 301 through the gas delivery part 204. Because the high-temperature gas has a higher density and the gas delivery part 204 continuously transports the high-temperature gas, the high-temperature gas is squeezed and moves downward. When the high-temperature gas moves downward, the filtering component 301 adsorbs and intercepts the passing gas, intercepting the impurities in the gas. At the same time, the internal breathable part 302 also filters the passing high-temperature gas, conducts breathable condensation on the high-temperature gas, so that there is no water vapor left in the high-temperature gas, and then it is transported to the steam generator 104 through the gas output part 303 at the bottom of the filtering component 301. The steam generator 104 starts to convert electrical energy through the high-temperature gas. At the same time, the water vapor condensed by the breathable part 302 also drips to the bottom of the filtering component 301 and is transported to the cooling water circulation part 103, and is re-transported back to the steam engine body 101 together with the water vapor inside the disturbing component 201 for cooling the steam engine body 101.

[0037] During use, after the waste heat steam generated by the steam engine body 101 is transported to the inside of the disturbing component 201 through the steam delivery part 102, a large amount of waste heat steam impacts inside the disturbing component 201, so that the disturbing component 201 can buffer the incoming steam and at the same time disturb the steam flow, so that the gas and liquid inside the steam can be better integrated together, and then move upward together. When passing through the separating component 202, the separating component 202 conducts spiral diversion on the mixed steam and gradually diverts it to the inside of the umbrella plate separator 202c. The umbrella plate separator 202c conducts preliminary water vapor interception on the steam, so that water can condense at the bottom of the umbrella plate separator 202c, and then the high-temperature gas passes through. The intercepting part 203 arranged at the top of the disturbing component 201 can intercept the passing high-temperature gas again to prevent a small amount of water vapor from passing through the separating component 202. The intercepted water vapor all drips to the bottom of the disturbing component 201 and flows into the cooling water circulation part 103, and is re-transported back to the steam engine body 101 by the cooling water circulation part 103 for cooling the steam engine body 101.

[0038] After the steam is separated by the disturbing component 201, the separating component 202 and the intercepting part 203, the separated high-temperature gas is transported to the inside of the filtering component 301 through the gas transport part 204. Since the high-temperature gas has a higher density and the gas transport part 204 continuously transports the high-temperature gas, the high-temperature gas is squeezed and moves downward. When the high-temperature gas moves downward, the filtering component 301 adsorbs and intercepts the passing gas to intercept the impurities in the gas. At the same time, the breathable part 302 inside the filtering component 301 also filters the passing high-temperature gas, conducts breathable condensation on the high-temperature gas, so that after there is no water vapor in the high-temperature gas, it is transported to the steam generator 104 through the gas output part 303 on the side wall of the filtering component 301. The steam generator 104 starts to convert electrical energy through the high-temperature gas. At the same time, the water vapor condensed by the breathable part 302 also drips to the bottom of the filtering component 301 and is transported to the cooling water circulation part 103, and is re-transported back to the steam engine body 101 together with the water vapor inside the disturbing component 201 to cool the steam engine body 101, greatly improving the waste heat recovery and utilization of the steam main engine, solving the problem that the main engine needs continuous cooling water for free circulation, avoiding the direct discharge of waste heat into the atmosphere, which not only wastes a large amount of energy but also reduces the energy utilization rate.

[0039] Embodiment 2

[0040] Such as Figure 5 And Figure 6As shown in the figure, this is the second embodiment of the present invention. The same parts as the first embodiment will not be described again. The differences between this embodiment and the first embodiment are as follows: The disturbing component 201 includes a separation tank 201a, a water storage member 201b, a guide block 201c, a fixing member 201d, a spiral member 201e, a filter plate 201f, and a turbulence fan 201g. The separation tank 201a is arranged at the bottom of the disturbing component 201, and its side is connected to the steam delivery part 102, and the top is connected to the separation component 202. Inside the separation tank 201a, a water storage member 201b, a rotating member 201e, and a fixing member 201d are arranged in sequence from bottom to top. The rotating member 201e is arranged inside the fixing member 201d and is fixedly connected to the separation tank 201a through the fixing member 201d. A turbulence fan 201g that is rotatably connected to it is also sleeved outside the rotating member 201e. The inside of the rotating member 201e is hollow and provided with a double-layer filter plate 201f through which steam can pass freely. The water storage member 201b is arranged at the bottom of the separation tank 201a, and a guide block 201c is arranged at one end of the water storage member 201b away from the steam delivery part 102. The guide block 201c is inclined in the direction away from the steam delivery part 102 and is fixedly connected to the water storage member 201b and the separation tank 201a. The water storage member 201b is preferably inclined towards the cooling water circulation part 103. After the waste heat steam generated by the steam engine body 101 is transported to the inside of the disturbing component 201 through the steam delivery part 102, a large amount of waste heat steam impacts on the guide block 201c. Through the guidance of the guide block 201c, a large amount of steam gas impacts on one side of the turbulence fan 201g, causing the turbulence fan 201g to start rotating, driving the surrounding steam to start rotating, disturbing the steam, and enabling the gas and moisture inside the steam to be fully mixed. The mixed steam moves upward through the rotating member 201e. At the same time, the filter plate 201f preliminarily intercepts the moisture inside the steam, and the intercepted and collected water vapor is uniformly collected on the water storage member 201b and then transported to the inside of the cooling water circulation part 103 for recycling.

[0041] Compared with the first embodiment, the differences of this embodiment also lie in that: The separation component 202 includes a connecting rod 202a, a spiral guide plate 202b, and an umbrella plate separation member 202c. The connecting rod 202a is arranged at the top of the fixing member 201d, and the other end is fixedly connected to the spiral guide plate 202b. The spiral guide plate 202b is connected to the separation tank 201a. An umbrella plate separation member 202c is arranged above the spiral guide plate 202b, and the umbrella plate separation member 202c preferably has two layers. The umbrella plate separation member 202c is conical, and the conical surface faces the interception part 203. A number of filter holes are arranged on the conical surface of the umbrella plate separation member 202c, and the diameter of the filter holes is less than 3 mm.

[0042] The interception part 203 includes a fixing ring 203a arranged at the inner top of the separation tank 201a and a demisting screen 203b arranged inside the fixing ring 203a. The demisting screen 203b cooperates with the gas transmission part 204. The steam mixed by the turbulent flow fan 201g is conveyed between the spiral guide plate 202b and the fixing part 201d through the fixing part 201d. Under the spiral guidance of the spiral guide plate 202b, the mixed steam moves spirally upward initially and then enters the umbrella plate separator 202c. Due to the conical double-layer interception effect of the umbrella plate separator 202c, most of the water vapor in the steam is intercepted and condensed. After the steam passes through the interception of the umbrella plate separator 202c, it drifts into the demisting screen 203b inside the fixing ring 203a to filter and intercept the steam again, greatly reducing the water vapor inside the steam. The intercepted water vapor drops uniformly on the top of the rotating part 201e and flows into the water storage part 201b through the diversion and filtration of the rotating part 201e and the filter plate 201f. Finally, it is all conveyed to the inside of the cooling water circulation part 103 and returned to the inside of the steam engine body 101 through the cooling water circulation part 103 to cool down the steam engine body 101, greatly improving the waste heat recovery and utilization of the steam main engine.

[0043] During use, after the waste heat steam generated by the steam engine body 101 is transported to the inside of the disturbance component 201 through the steam transport part 102, a large amount of waste heat steam impacts on the guide block 201c. Through the guidance of the guide block 201c, a large amount of steam gas impacts on one side of the spoiler fan 201g, causing the spoiler fan 201g to start rotating, driving the surrounding steam to start rotating, disturbing the steam, and enabling the gas and moisture inside the steam to be fully mixed. The mixed steam moves upward through the rotating part 201e. At the same time, the moisture inside the steam is preliminarily intercepted by the filter plate 201f, and the intercepted and collected water vapor is uniformly collected on the water storage part 201b, and then all transported to the inside of the cooling water circulation part 103 for recycling. Under the spiral guidance of the spiral guide plate 202b, the mixed steam moves upward in a spiral for the first time, and then enters the umbrella plate separation part 202c. At the same time, because the umbrella plate separation part 202c is a conical double-layer interception structure, it can adsorb and condense the passing steam, so that most of the water vapor in the steam is intercepted and condensed. After the steam passes through the interception of the umbrella plate separation part 202c, it drifts into the foam-breaking net 203b inside the fixed ring 203a to filter and intercept the steam again, greatly reducing the water vapor inside the steam. The intercepted water vapor uniformly drips on the top of the rotating part 201e, and through the diversion and filtration of the rotating part 201e and the filter plate 201f, it all flows into the inside of the water storage part 201b, and finally all transported to the inside of the cooling water circulation part 103, and is transported back to the inside of the steam engine body 101 through the cooling water circulation part 103 to cool down the steam engine body 101, greatly improving the waste heat recovery and utilization of the steam main engine.

[0044] Embodiment 3

[0045] As Figures 7 to 10As shown, this is the third embodiment of the present invention. The same parts as those in the first embodiment will not be described again. The difference between this embodiment and the first and second embodiments is that the filtering component 301 includes a filtering tank 301a, a first filtering ring plate 301b, an activated carbon layer 301c, and a second filtering ring plate 301d. The filtering tank 301a is arranged at the top of the filtering component 301 and is connected to the gas conveying part 204. Inside the filtering tank 301a, a first filtering ring plate 301b, an activated carbon layer 301c, and a second filtering ring plate 301d are arranged in sequence from top to bottom. Here, "from top to bottom" means from the direction close to the gas conveying part 204 to the direction far from the gas conveying part 204. The second filtering ring plate 301d is connected to the separation tank 301a. After being intercepted and separated by the disturbing component 201, the separation component 202, and the intercepting part 203, the separated high-temperature gas is conveyed to the inside of the gas conveying part 204 and is conveyed to the inside of the filtering tank 301a through the gas conveying part 204. The density of the high-temperature gas conveyed to the inside of the filtering tank 301a itself is relatively high, and at the same time, the gas conveying part 204 is continuously conveying high-temperature gas, so that the high-temperature gas inside the filtering tank 301a starts to move downward and moves into the inside of the first filtering ring plate 301b. When passing through the first filtering ring plate 301b, the first filtering ring plate 301b starts to adsorb small molecule impurities inside the high-temperature gas to ensure the purity of the high-temperature gas. Then, after being adsorbed by the activated carbon layer 301c, it floats out from the second filtering ring plate 301d and moves downward, thereby ensuring the purity of the high-temperature gas and maximizing the utilization rate when it is conveyed to the steam generator 104.

[0046] Compared with the first embodiment, the difference in this embodiment is also that: the air-permeable part 302 includes a first air-permeable cloth 302a and a second air-permeable cloth 302b arranged inside the filter tank 301a. The first air-permeable cloth 302a is arranged below the second filter ring plate 301d, and the second air-permeable cloth 302b is arranged below the first air-permeable cloth 302a. The second air-permeable cloth 302b cooperates with the gas output part 303. After being adsorbed and filtered by the first filter ring plate 301b and the activated carbon layer 301c, the high-temperature gas passes through the first air-permeable cloth 302a. When the gas passes through the first air-permeable cloth 302a, due to the characteristics of the material of the first air-permeable cloth 302a, the high-temperature gas can easily pass through, and a small part of the water molecules inside are adsorbed on the surface of the first air-permeable cloth 302a, preventing the high-temperature gas from containing a small amount of water molecules. Similarly, the high-temperature gas passes through the first air-permeable cloth 302a and enters the second air-permeable cloth 302b. The cooperation of the first air-permeable cloth 302a and the second air-permeable cloth 302b can adsorb the water vapor inside the high-temperature gas to the greatest extent. Finally, the filtered high-temperature steam is transported to the inside of the gas output part 303 and is transported to the steam generator 104 through the gas output part 303 for energy conversion. At the same time, the water vapor filtered by the air-permeable part 302 drips to the bottom of the filter tank 301a and is transported to the inside of the cooling water circulation part 103, and is transported to the inside of the steam engine body 101 together with the water vapor inside the separation tank 201a to cool the steam engine body 101, effectively utilizing the waste heat steam generated by the steam engine body 101, realizing the efficient conversion and utilization of energy, improving the energy utilization rate and reducing environmental pollution.

[0047] During the use process, after being intercepted and separated by the disturbing component 201, the separating component 202 and the intercepting part 203, the separated high-temperature gas is transported to the inside of the gas transport part 204 and is transported to the inside of the filter tank 301a through the gas transport part 204. The density of the high-temperature gas transported to the inside of the filter tank 301a itself is relatively high, and at the same time, the gas transport part 204 is also continuously transporting the high-temperature gas, causing the high-temperature gas inside the filter tank 301a to start moving downward and moving into the inside of the first filter ring plate 301b. When passing through the first filter ring plate 301b, the first filter ring plate 301b starts to adsorb the small molecule impurities inside the high-temperature gas to ensure the purity of the high-temperature gas inside. Then, after being adsorbed by the activated carbon layer 301c, it floats out from the second filter ring plate 301d and moves downward, thereby ensuring the purity of the high-temperature gas inside, so that when it is transported to the steam generator 104, the utilization rate reaches the maximum.

[0048] After the adsorption and filtration by the filter ring plate 301b and the activated carbon layer 301c, the high-temperature gas passes through the first breathable cloth 302a, and a small part of the water molecules inside are adsorbed on the surface of the first breathable cloth 302a, preventing a small amount of water molecules from being contained in the high-temperature gas. Similarly, the high-temperature gas enters the second breathable cloth 302b through the first breathable cloth 302a. The cooperation of the first breathable cloth 302a and the second breathable cloth 302b can adsorb the intercepted water vapor inside the high-temperature gas to the greatest extent. Finally, the filtered high-temperature steam is transported to the inside of the gas output part 303 and then transported to the steam generator 104 through the gas output part 303 for energy conversion. At the same time, the water vapor filtered by the breathable part 302 drips to the bottom of the filter tank 301a and is transported to the inside of the cooling water circulation part 103, and is transported to the inside of the steam engine body 101 together with the water vapor inside the separation tank 201a to cool the steam engine body 101. The waste heat steam generated by the steam engine body 101 is effectively utilized, realizing the efficient conversion and utilization of energy, improving the energy utilization rate and reducing environmental pollution. Through multiple components such as disturbing, separating, intercepting, and filtering, not only can the high-temperature steam be converted into electric energy, but also the steam engine body can be cooled by the recycled water, reducing the operating cost and extending the equipment life. At the same time, the environment is protected, and the economic benefits and adaptability are improved.

[0049] In addition to the above embodiments, the present invention may have other embodiments. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A waste heat recovery device for exhaust gas from a ship main engine, characterized in that: The invention comprises a steam engine unit (100), a filter unit (300), and a recovery unit (200) arranged between the steam engine unit (100) and the filter unit (300), wherein the top of the filter unit (300) is connected to the recovery unit (200), and the bottom is connected to the steam engine unit (100); the steam engine unit (100) comprises a steam engine body (101), a steam conveying part (102) and a cooling water circulation part (103) arranged on the steam engine body (101), and a steam generator (104); the recovery unit (200) comprises a disrupting group connected to the cooling water circulation part (103) at the bottom; The invention relates to a filter unit (300) comprising a filter assembly (301) connected to the gas delivery part (204), a separation assembly (202) arranged inside the disrupting assembly (201), and an intercepting part (203) and a gas delivery part (204) arranged on the top of the disrupting assembly (201); the filter unit (300) comprises a filter assembly (301) connected to the gas delivery part (204), a breathable part (302) arranged inside the filter assembly (301), and a gas output part (303) arranged on the side wall of the filter assembly (301), the other end of the gas output part (303) is connected to the steam generator (104), and the bottom of the filter assembly (301) is connected to the cooling water circulation part (103).

2. The exhaust gas waste heat recovery device for a ship main engine according to claim 1 is characterized in that: The disturbance component (201) comprises a separation tank (201a), a water storage component (201b) arranged at the bottom of the separation tank (201a), and a fixed component (201d) arranged above the water storage component (201b); a rotating component (201e) is arranged inside the fixed component (201d); a spoiler fan (201g) is sleeved on the outside of the rotating component (201e) and is rotatably connected; and the rotating component (201e) is hollow inside.

3. The exhaust gas waste heat recovery device for a ship main engine according to claim 2 is characterized in that: A guide block (201c) is provided at one end of the water storage member (201b) away from the steam conveying portion (102).

4. The exhaust gas waste heat recovery device for a ship main engine according to claim 3 is characterized in that: The guide block (201c) is inclined in a direction away from the steam conveying portion (102).

5. The exhaust gas waste heat recovery device for a ship main engine according to claim 4 is characterized in that: A filter plate (201f) is arranged inside the rotating member (201e).

6. The exhaust gas waste heat recovery device for a ship main engine according to claim 2 is characterized in that: The separation assembly (202) comprises a connecting rod (202a), a spiral guide plate (202b) and an umbrella-plate separation piece (202c); one end of the connecting rod (202a) is connected to a fixing piece (201d), and the other end is connected to the spiral guide plate (202b); the umbrella-plate separation piece (202c) is arranged above the spiral guide plate (202b) and connected to the separation tank (201a).

7. The exhaust gas waste heat recovery device for a ship main engine according to claim 6 is characterized in that: The umbrella-plate separator (202c) is in a cone shape as a whole, and the cone surface faces the interception portion (203). A plurality of filter holes are arranged on the cone surface of the umbrella-plate separator (202c), and the diameter of the filter holes is less than 3 mm.

8. The exhaust gas waste heat recovery device for a ship main engine according to claim 5 is characterized in that: The intercepting portion (203) includes a fixing ring (203a) disposed at the top end of the separation tank (201a), and a foam breaking net (203b) disposed inside the fixing ring (203a), and the foam breaking net (203b) cooperates with the gas conveying portion (204).

9. The exhaust gas waste heat recovery device for a ship main engine according to claim 6, characterized in that: The filter assembly (301) comprises a filter tank (301a) connected to the gas delivery portion (204), and a filter ring plate (301b), an activated carbon layer (301c) and a second filter ring plate (301d) arranged inside the filter tank (301a) and arranged in sequence from top to bottom, wherein the second filter ring plate (301d) is connected to the separation tank (301a).

10. The exhaust gas waste heat recovery device for a ship main engine according to claim 9, characterized in that: The air permeable part (302) includes air permeable cloth one (302a) and air permeable cloth two (302b) which are arranged inside the filter tank (301a); the air permeable cloth one (302a) is arranged below the filter ring plate two (301d), and the air permeable cloth two (302b) is arranged below the air permeable cloth one (302a); the air permeable cloth two (302b) cooperates with the gas output part (303).

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