Exhaust funnel, container and dead steam waste heat recovery method
By designing an exhaust cylinder containing a spiral nozzle and a collection assembly, the heat loss caused by direct emission of steam in chemical production is solved, and the effect of heat recovery and pressure stability is achieved.
Patent Information
- Application Number
- CN202411733672.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-04
AI Technical Summary
The problem of direct emission of steam in tank containers in chemical production leads to heat loss.
An exhaust cylinder is designed, including a cylinder, first and second cooling components, and a collection components. The cooling assembly sprays coolant through a spiral nozzle and exchanges heat with the exhaust gas. The collection assembly is used to collect the coolant after the heat absorption.
The heat recovery rate of exhausted steam is improved through heat exchange, the pressure fluctuations in the container are reduced, and heat waste is reduced.
Smart Images
Figure CN119549081A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of waste heat recovery, and specifically relates to an exhaust pipe, a container and a method for recovering waste heat from exhaust steam. Background Art
[0002] Tanks and other containers are used on a large scale in chemical production. At the same time, many tanks are operated in a hot state. The exhaust steam evaporated from the tanks needs to be discharged in time to reduce the pressure in the tanks and ensure the safe and stable operation of the tanks.
[0003] In the related art, an exhaust chimney is usually installed on the top of the tank, and the exhaust steam is directly discharged during the production process, resulting in heat and water resource losses. Summary of the invention
[0004] In order to solve the technical problem of heat loss caused by direct exhaust steam discharge in the current tank container, the present application provides an exhaust pipe, a container and an exhaust steam waste heat recovery method.
[0005] In a first aspect of the present application, an exhaust pipe is provided, comprising:
[0006] The cylinder body has a lower end connected to a container containing high-temperature liquid and is provided with a liquid discharge port;
[0007] A first cooling assembly and a second cooling assembly, wherein the first cooling assembly comprises a first spiral nozzle for spraying cooling liquid, and the second cooling assembly comprises a second spiral nozzle for spraying cooling liquid, wherein the first spiral nozzle and the second spiral nozzle are both located in the cylinder and are sequentially arranged from bottom to top, and outlets of the first spiral nozzle and the second spiral nozzle are arranged opposite to each other;
[0008] A collecting assembly is used to collect the coolant and is located in the cylinder. The collecting assembly is arranged below the first spiral nozzle and is provided with an air passage for the exhaust steam in the container to pass through. The collecting assembly is connected to the drain port.
[0009] In some embodiments, there are multiple second spiral nozzles, and the multiple second spiral nozzles are sequentially arranged above the first spiral nozzle along the height direction; the first spiral nozzle and the second spiral nozzle are both located on the axis of the cylinder.
[0010] In some embodiments, two second spiral nozzles are provided, and the distance between the two second spiral nozzles is not less than the distance between the second spiral nozzle located below and the first spiral nozzle.
[0011] In some embodiments, the distance between the two second spiral nozzles is 2 to 3 m; the distance between the second spiral nozzle located at the bottom and the first spiral nozzle is 1 to 2 m.
[0012] In some embodiments, the diameters of the first spiral nozzle and the second spiral nozzle are 10 to 30 mm, and the inner diameter of the cylinder is 600 to 1000 mm.
[0013] In some embodiments, the first cooling component and the second cooling component both include a nozzle and a valve, the valve is disposed on the nozzle, the nozzle of the first cooling component is connected to the first spiral nozzle, and the nozzle of the second cooling component is connected to the second spiral nozzle.
[0014] In some embodiments, the collecting assembly includes a first collecting piece and a second collecting piece located in the cylinder, the nozzle, the first collecting piece and the second collecting piece are arranged in sequence from top to bottom, the first collecting piece and the inner wall of the cylinder have a first gap, the second collecting piece and the inner wall of the cylinder have a second gap, along the radial direction of the cylinder, the first gap and the second gap are staggered and interconnected, the first gap and the second gap together constitute the air passage, and the second collecting piece is connected to the discharge port.
[0015] In some embodiments, a controller and a pressure sensor for detecting the exhaust steam pressure at the lower end of the cylinder are further included, and the pressure sensor and the valve are both electrically connected to the controller.
[0016] In a second aspect of the present application, a container is provided, comprising:
[0017] ontology;
[0018] The exhaust pipe of the first aspect has a lower end which is in communication with the main body.
[0019] In a third aspect of the present application, a method for recovering waste heat from exhaust steam is provided, which is applicable to the container of the second aspect and comprises the following steps:
[0020] The exhaust steam in the container rises into the cylinder through the gas passage of the collecting assembly, a part of the coolant is sprayed upward through the first spiral nozzle, rises together with the exhaust steam and exchanges heat, and the other part of the coolant is sprayed downward through the second spiral nozzle, and exchanges heat with the exhaust steam in the countercurrent; wherein, when the pressure at the lower end of the cylinder is not lower than the set pressure, the coolant flow rate of the second spiral nozzle is greater than the coolant flow rate of the first spiral nozzle, and when the pressure is lower than the set pressure, the coolant flow rates of the first spiral nozzle and the second spiral nozzle are equal;
[0021] The cooling liquid moves downward after absorbing heat, and is collected by the collecting component and then discharged from the drain port for recovery.
[0022] According to the exhaust chimney provided in the embodiment of the present application, the exhaust steam in the container moves upward through the air passage, the first spiral nozzle at the lower part of the cylinder body faces upward, and the sprayed coolant moves upward first and then moves downward. During the upward movement, the coolant can drive the exhaust steam to move upward, so that the local pressure in the container will not be too large. At the same time, the coolant and the exhaust steam undergo heat exchange, and the remaining exhaust steam continues to move upward. The second spiral nozzle faces downward, and the sprayed coolant moves downward, exchanging heat with the exhaust steam in the reverse direction. At the same time, the hood-shaped coolant prevents the exhaust steam from being discharged, thereby improving the heat recovery rate. The coolant after the heat exchange moves downward, and is collected by the collecting component and then discharged through the drain port.
[0023] The outlets of the first spiral nozzle and the second spiral nozzle are arranged relative to each other, which not only ensures that the pressure in the container will not be too high, but also improves the exhaust steam heat recovery rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 A schematic diagram of the structure of an exhaust pipe in one or more embodiments of the present application is shown.
[0025] Figure 2 Shows Figure 1 Schematic diagram of the exhaust pipe structure.
[0026] Figure 3 A schematic diagram of the exhaust pipe working state is shown.
[0027] Figure 4 A schematic structural diagram of a container of the present application is shown.
[0028] Description of reference numerals:
[0029] 1000-container, 100-exhaust pipe, 110-cylinder body, 111-drainage port; 120-first cooling component, 121-valve of the first cooling component, 122-nozzle of the first cooling component, 123-first spiral nozzle; 130-second cooling component, 131-valve of the second cooling component, 132-nozzle of the second cooling component, 133-second spiral nozzle; 140-collecting component, 141-first collecting piece, 1411-first partition, 142-second collecting piece, 1421-collecting chamber, 1422-collecting port, 1423-second partition; 150-umbrella cap; 200-main body. DETAILED DESCRIPTION
[0030] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0031] The first embodiment of the present application provides an exhaust chimney that can not only recover the exhaust steam in a container such as a tank, but also improve the pressure stability in the container, thereby solving the technical problem of wasteful direct exhaust steam discharge.
[0032] The present application is described below with reference to the accompanying drawings and specific embodiments:
[0033] See also Figure 1 The exhaust chimney 100 provided in the present application includes a cylinder body 110 , a first cooling assembly 120 , a second cooling assembly 130 and a collecting assembly 140 .
[0034] The lower end of the cylinder 110 is connected to a container 1000 containing a high-temperature liquid, such as a sodium aluminate solution at 90° C. to 100° C., so that the exhaust steam of the high-temperature liquid can be discharged to the cylinder 110 .
[0035] The first cooling assembly 120 includes a first spiral nozzle 123, and the second cooling assembly 130 includes a second spiral nozzle 133. The spiral nozzles can spray out conical coolant. The first spiral nozzle 123 and the second spiral nozzle 133 are both located in the barrel 110 and are sequentially distributed from bottom to top. The outlets of the first spiral nozzle 123 and the second spiral nozzle 133 are arranged relative to each other, that is, the outlet of the first spiral nozzle 123 faces upward, and the outlet of the second spiral nozzle 133 faces downward. The outlet of the first spiral nozzle 123 faces upward. In this arrangement, the conical coolant sprayed by the first spiral nozzle 123 faces upward at the large end, and while exchanging heat with the exhaust steam, it drives the exhaust steam upward, thereby improving the stability of the pressure in the container 1000. If the outlet of the first spiral nozzle 123 faces downward, a coolant with a large end facing downward will be formed, which will seal the exhaust steam, making it difficult for the exhaust steam to move upward, causing the local pressure in the container 1000 to be too high, affecting production. The coolant sprayed from the second spiral nozzle 133 faces downward, so the sprayed hood-shaped coolant plays a certain sealing role, preventing the exhaust steam from being discharged from the cylinder 110, thereby improving the heat recovery rate. At this time, the pressure of the exhaust steam has been reduced after the heat exchange with the coolant sprayed from the first spiral nozzle 123, and has little effect on the pressure in the container 1000.
[0036] The collecting assembly 140 is located in the cylinder 110 and below the first spiral nozzle 123, so that the coolant after heat exchange can fall into the collecting assembly 140. The cylinder 110 is provided with a drain port 111, and the collecting assembly 140 is connected with the drain port 111, so that the coolant can be discharged from the drain port 111. The collecting assembly 140 is provided with a gas passage, so that the exhaust steam can move upward from the container 1000 to exchange heat with the coolant sprayed from the first spiral nozzle 123 and the second spiral nozzle 133.
[0037] Since the first spiral nozzle 123 is facing upward, the sprayed coolant first moves upward and then downward. The coolant drives the exhaust steam upward while cooling the exhaust steam, thereby stabilizing the pressure in the container 1000. Since the second spiral nozzle 133 is facing downward, the sprayed coolant moves downward and presents an inverted funnel shape, covering the exhaust steam, which can prevent the exhaust steam from being discharged and improve the heat recovery rate. Through the cooperation of the first spiral nozzle 123 and the second spiral nozzle 133, the pressure in the container 1000 is stabilized and the heat recovery rate is improved.
[0038] The cylinder 110 is the main structure of the exhaust cylinder 100. While assuming the exhaust function, it also provides the installation foundation for the first cooling assembly 120, the second cooling assembly 130 and the collection assembly 140. The cylinder 110 is generally installed on the top of the container 1000. By taking advantage of the upward flow of exhaust steam, it is convenient to discharge the exhaust steam, thereby reducing the pressure in the tank and ensuring the safe and stable operation of the tank.
[0039] See also Figure 1 , an umbrella cap 150 is provided on the top of the cylinder 110 to reduce the direct exhaust volume of the exhaust steam. The umbrella cap 150 is provided with an exhaust hole for exhaust steam discharge, or the umbrella cap 150 is spaced apart from the upper end of the cylinder 110, and the gap between the umbrella cap 150 and the cylinder 110 constitutes the exhaust hole. A conical water collecting short circuit is installed on the umbrella cap 150, and part of the exhaust steam condenses when encountering the umbrella cap 150. The condensed water re-enters the exhaust pipe 100 through the water collecting short circuit, thereby achieving the purpose of exhaust steam heat recovery and exhaust steam exhaust reduction. The setting of the umbrella cap 150 can also play a protective role, preventing particulate debris, dust or rainwater from entering the container 1000 through the cylinder 110. The cylinder 110 and the container 1000 can be connected by welding, which has high connection strength and good stability.
[0040] The collecting assembly 140 is a coolant collecting structure, which is located at the bottom of the cylinder 110. Figure 2The collecting assembly 140 includes a first collecting piece 141 and a second collecting piece 142, which are arranged in sequence from top to bottom. The first collecting piece 141 and the inner wall of the cylinder 110 have a first gap 1411, and the second collecting piece 142 and the inner wall of the cylinder 110 have a second gap 1423. Along the radial direction of the cylinder 110, the first gap 1411 and the second gap 1423 are staggered, and the first gap 1411 and the second gap 1423 together constitute a bent air passage, so that the exhaust steam moves upward through the second gap 1423 and the second gap 1423 in sequence.
[0041] Please continue reading Figure 2 The first spiral nozzle 123, the first collecting member 141 and the second collecting member 142 are arranged in sequence from top to bottom. A portion of the coolant first falls to the first collecting member 141, and then moves to the second collecting member 142 through the first spacer 1411. The second collecting member 142 is connected to the drain port 111, and the coolant is discharged through the drain port 111; another portion of the coolant directly falls to the second collecting member 142 and is directly discharged from the drain port 111. The first spacer 1411 and the second spacer 1423 are staggered so that the first collecting member 141 and the second collecting member 142 cooperate to collect the coolant sprayed from the first spiral nozzle 123 and the second spiral nozzle 133, and prevent the coolant from falling into the container 1000.
[0042] In some embodiments, please refer to Figure 2 The first collecting member 141 may be a collecting plate, which is tilted, with its upper end connected to the inner wall of the cylinder 110, and a first spacer 1411 between its lower end and the inner wall of the cylinder 110, so that the coolant can move downward by its own gravity. The second collecting member 142 has a collecting cavity 1421 and a collecting port 1422 connected to the collecting cavity 1421, and its upper end forms a second spacer 1423 with the inner wall of the cylinder 110. The coolant on the collecting plate falls into the collecting cavity 1421 through the collecting port 1422, and the collecting cavity 1421 is connected to the drain port 111, and the coolant is discharged from the drain port 111.
[0043] In other embodiments, the first collecting piece 141 and the second collecting piece 142 are both provided with a collecting chamber 1421 and a collecting port 1422 connected to the collecting chamber 1421. A drainage hole is provided at the bottom of the first collecting piece 141, and the drainage hole is located above the collecting port 1422 of the second collecting piece 142. A portion of the coolant falls into the collecting chamber 1421 of the first collecting piece 141, and then flows into the collecting chamber 1421 of the second collecting piece 142 through the drainage hole and is discharged through the drain port 111.
[0044] The first cooling assembly 120 and the second cooling assembly 130 are structures for providing cooling liquid, and the cooling liquid is sprayed by the first spiral nozzle 123 and the second spiral nozzle 133. The spiral nozzle is also called a desulfurization nozzle, an anti-clogging nozzle, a large flow nozzle, etc. It is a solid cone or hollow cone spray nozzle. After the cooling liquid is tangent and collides with the continuously decreasing spiral surface, it becomes tiny liquid droplets and sprays out to form a mist. The cooling liquid spray sprayed by the spiral nozzle is a solid cone or a hollow cone, which can cover the cross section of the cylinder 110.
[0045] The first spiral nozzle 123 and the second spiral nozzle 133 both include a connected spiral section and a connecting section. The diameter of the connecting section, that is, the diameter of the spiral nozzle, can be 10 to 30 mm, for example, 12 mm, 15 mm, 16 mm or 18 mm, etc. The inner diameter of the cylinder 110 is 600 to 1000 mm, for example, 650 mm, 680 mm, 690 mm, 700 mm, 720 mm, 750 mm, 780 mm, 800 mm, 850 mm, 900 mm, 950 mm or 980 mm, etc. The two match each other, which improves the heat recovery rate to a certain extent and reduces the impact on the pressure fluctuation of the container 1000.
[0046] In some embodiments, there are multiple first spiral nozzles 123, such as two or three, and the multiple first spiral nozzles 123 are sequentially arranged along the height direction to further assist in lifting the exhaust steam and reduce the local pressure fluctuation of the container 1000. In other embodiments, there is only one first spiral nozzle 123, which is small in number and low in cost, and can also achieve the effect of stabilizing the pressure of the container 1000.
[0047] In some embodiments, please refer to Figure 1 The second spiral nozzles 133 are provided with a plurality of them, for example, two or three, and the plurality of second spiral nozzles 133 are arranged in sequence along the height direction, further reducing the amount of exhaust steam discharged from the exhaust pipe 100 and improving the heat recovery rate. In some embodiments, the second spiral nozzles 133 are provided with two, the number is not too large, the cost is low, and a higher heat recovery rate can be achieved.
[0048] In some embodiments, please refer to Figure 1 The first spiral nozzle 123 and the second spiral nozzle 133 are both located on the axis of the cylinder 110, so that the water mist of the nozzle is distributed around the axis of the cylinder 110, and the heat absorption effect is better. In other embodiments, the first spiral nozzle 123 and / or the second spiral nozzle 133 can also be staggered with the axis of the cylinder 110, which can also achieve the recovery of exhaust steam heat and stabilize the local pressure in the container 1000.
[0049] In some embodiments, please refer to Figure 1, the axis of the first spiral nozzle 123 and the second spiral nozzle 133 are collinear with the axis of the cylinder 110, the formed water mist is distributed with the axis of the cylinder 110 as the center, and the heat absorption effect is better. In other embodiments, the axis of the first spiral nozzle 123 and / or the second spiral nozzle 133 and the axis of the cylinder 110 are clamped, which can also realize the recovery of exhaust steam heat and stabilize the local pressure in the container 1000.
[0050] For ease of introduction, the axial length of the cylinder 110 is L, and the inner diameter is D. Figure 3 The distance between the lower end of the cylinder 110 and the lowest first spiral nozzle 123 is d1, the distance between the highest first spiral nozzle 123 and the lowest second spiral nozzle 133 is d2, and the distance between two adjacent second spiral nozzles 133 is d3.
[0051] In some embodiments, the axial length L of the cylinder 110 can be 6 to 8 m, the inner diameter D can be 600 to 1000 mm, d1 can be 1 to 2 m, d2 can be 1 to 2 m, and d3 can be 2 to 3 m. The dimensions match each other so that the conical coolant sprayed from the spiral nozzle does not affect each other, further improving the recovery rate of the exhaust steam heat and stabilizing the local pressure in the container 1000.
[0052] In some embodiments, d3≥d2, that is, the distance between two adjacent second spiral nozzles 133 is not less than the distance between the second spiral nozzle 133 located at the bottom and the first spiral nozzle 123 at the top, giving the exhaust steam a longer running distance, reducing the impact on the pressure in the container 1000, and improving the pressure stability in the container 1000. In other embodiments, d3<d2, it is also possible to recover the heat of the exhaust steam and stabilize the pressure in the container 1000.
[0053] Please continue reading Figure 1 The first cooling component 120 and the second cooling component 130 both include nozzles 122, 132 and valves 121, 131. Cooling water is delivered to the spiral nozzles through the nozzles 122, 132. Valves 121, 131 are arranged on the nozzles 122, 132. The nozzle 122 of the first cooling component 120 is connected with the first spiral nozzle 123. The nozzle 132 of the second cooling component 130 is connected with the second spiral nozzle 133. The corresponding spiral nozzles are opened or closed by valves 121, 131, and each can be adjusted separately without affecting each other.
[0054] In some embodiments, the first cooling assembly 120 is provided in plurality, and then the nozzle 122, the valve 121 and the first spiral nozzle 123 are provided in plurality, and are arranged one by one. Each first spiral nozzle 123 is controlled by the corresponding valve 121, and flow regulation, nozzle removal and replacement can be realized independently without affecting each other. In other embodiments, the nozzle 122 includes a main pipe and a plurality of branch pipes connected to the main pipe, the valve is located on the main pipe, the branch pipes correspond to the first spiral nozzle 123 one by one, and the corresponding branch pipes are connected to the first spiral nozzle 123. The plurality of first spiral nozzles 123 are controlled by one valve 121, and the control is more concise.
[0055] The second cooling assembly 130 is similar to the first cooling assembly 120. In some embodiments, please continue to refer to Figure 1 , if there are multiple second cooling components 130, then there are multiple nozzles 132, valves 131 and second spiral nozzles 133, and they are arranged one by one. Each second spiral nozzle 133 is controlled by the corresponding valve 131, and flow regulation, nozzle removal and replacement can be achieved independently without affecting each other. In other embodiments, the nozzle 132 includes a main pipe and multiple branch pipes connected to the main pipe, the valve 131 is located on the main pipe, the branch pipes correspond to the second spiral nozzles 133 one by one, and the corresponding branch pipes are connected to the second spiral nozzles 133. Multiple second spiral nozzles 133 are controlled by one valve 131, and the control is simpler.
[0056] In some embodiments, the exhaust chimney 100 further includes a controller and a pressure sensor. The pressure sensor is used to detect the exhaust steam pressure at the lower end of the cylinder 110. The valve is an electrically controlled valve. The pressure sensor is electrically connected to the controller and the electrically controlled valve.
[0057] The exhaust steam pressure detected by the pressure sensor can be used as a reference for adjusting the coolant flow rate of the first spiral nozzle 123 and the second spiral nozzle 133. For example, when the exhaust steam pressure is not lower than the set pressure, the exhaust steam pressure is too large and the heat therein needs to be quickly absorbed. The controller can control the opening of the valve, send instructions to the valves 121 and 131 of the first cooling assembly 120 and the second cooling assembly, and adjust the opening of the valves 121 and 131 so that the coolant flow rate of the second spiral nozzle 133 is greater than the coolant flow rate of the first spiral nozzle 123. The flow rate of the coolant of the second spiral nozzle 133 becomes larger, which can improve the heat exchange efficiency between the coolant and the exhaust steam. The flow rate of the first spiral nozzle 123 is small, and the pressure of the container 1000 is less affected. When the exhaust steam pressure is lower than the set pressure, the controller controls the opening of the valves 121 and 131 so that the coolant flow rates of the first spiral nozzle 123 and the second spiral nozzle 133 are equal, and the valves 121 and 131 are easy to control and have high heat exchange efficiency.
[0058] When adjusting the opening of valves 121 and 131, the opening of valve 131 of the second cooling component 130 can be increased, or the opening of valve 111 of the first cooling component 120 can be decreased so that the coolant flow of the second spiral nozzle 133 is greater than the coolant flow of the first spiral nozzle 123.
[0059] In a second aspect of the present application, a container 1000 is provided, which may be a holding tank or a holding can, etc. The high-temperature medium therein may be an intermediate solution in an alumina production line, such as a sodium aluminate solution at 90°C to 100°C. After heat exchange between the coolant and the exhaust steam of the sodium aluminate solution, water at about 80°C may be formed, which may be used as a diluting solvent for diluting and dissolving the sodium aluminate slurry (with a temperature of 110°C), thereby reducing the temperature fluctuation of the sodium aluminate slurry.
[0060] See also Figure 4 The container 1000 provided in the present application includes a main body 200 and an exhaust chimney 100 of any embodiment of the first aspect, and the lower end of the exhaust chimney 100 is connected to the main body 200 to facilitate the exhaust steam to flow from the main body 200 to the exhaust chimney 100 for heat recovery.
[0061] The controller of the exhaust pipe 100 can be a separate controller or a controller provided by the container body 200. When the exhaust pipe 100 is provided with a separate controller and the container body 200 also has a controller, the two controllers are electrically connected to realize linkage control of the container body 200 and the exhaust pipe 100, and the automation is higher.
[0062] The second embodiment of the present application provides a method for recovering waste heat from exhaust steam, which is applicable to the container 1000 of the second aspect, and can reduce local pressure fluctuations in the container 1000 and improve local pressure stability in the container 1000.
[0063] The exhaust steam waste heat recovery method provided in this application comprises the following steps:
[0064] S1. The exhaust steam in the container 1000 rises into the cylinder 110 through the air holes of the collecting assembly 140, a part of the coolant is sprayed upward through the first spiral nozzle 123, rises together with the exhaust steam and exchanges heat, and the other part of the coolant is sprayed downward through the second spiral nozzle 133, and exchanges heat with the countercurrent exhaust steam; wherein, when the pressure at the lower end of the cylinder 110 is not lower than the set pressure, the coolant flow rate of the second spiral nozzle 133 is greater than the coolant flow rate of the first spiral nozzle 123, and when the pressure is lower than the set pressure, the coolant flow rates of the first spiral nozzle 123 and the second spiral nozzle 133 are equal;
[0065] S2. The cooling liquid after absorbing heat moves downward, is collected by the collecting assembly 140, and is discharged from the drain port 111.
[0066] In step 1, the pressure at the lower end of the cylinder 110 is detected by a pressure sensor, and the coolant flow of the first spiral nozzle 123 and the second spiral nozzle 133 is achieved by adjusting the opening of their respective valves.
[0067] The exhaust pipe 100 provided by the present application is provided with a first cooling assembly 120 and a second cooling assembly 130, which can recover heat and part of water resources in high-temperature exhaust steam, reduce the exhaust steam discharge volume, and reduce heat waste and environmental pollution. The present application can directly transform the existing exhaust pipe 100 at a low cost. After heat exchange, the cold source is heated and continued to be used, which effectively solves the problem of heat loss and environmental pollution caused by direct discharge of high-temperature exhaust steam, and has a good effect on reducing enterprise energy consumption and reducing environmental pollution.
[0068] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0070] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0071] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0072] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. An exhaust pipe, characterized in that: include: The cylinder body has a lower end connected to a container containing high-temperature liquid and is provided with a liquid discharge port; A first cooling assembly and a second cooling assembly, wherein the first cooling assembly comprises a first spiral nozzle for spraying cooling liquid, and the second cooling assembly comprises a second spiral nozzle for spraying cooling liquid, wherein the first spiral nozzle and the second spiral nozzle are both located in the cylinder and are sequentially arranged from bottom to top, and outlets of the first spiral nozzle and the second spiral nozzle are arranged opposite to each other; A collecting assembly is used to collect the coolant and is located in the cylinder. The collecting assembly is arranged below the first spiral nozzle and is provided with an air passage for the exhaust steam in the container to pass through. The collecting assembly is connected to the drain port.
2. The exhaust pipe according to claim 1, characterized in that: There are multiple second spiral nozzles, and the multiple second spiral nozzles are sequentially arranged above the first spiral nozzle along the height direction; the first spiral nozzle and the second spiral nozzle are both located on the axis of the cylinder.
3. The exhaust pipe according to claim 2, characterized in that: There are two second spiral nozzles, and the distance between the two second spiral nozzles is not less than the distance between the second spiral nozzle located below and the first spiral nozzle.
4. The exhaust pipe according to claim 3, characterized in that: The distance between the two second spiral nozzles is 2m to 3m; the distance between the second spiral nozzle located at the bottom and the first spiral nozzle is 1m to 2m.
5. The exhaust pipe according to any one of claims 1 to 4, characterized in that: The diameters of the first spiral nozzle and the second spiral nozzle are 10 mm to 30 mm, and the inner diameter of the cylinder is 600 mm to 1000 mm.
6. The exhaust pipe according to any one of claims 1 to 4, characterized in that: The first cooling component and the second cooling component both include a nozzle and a valve, wherein the valve is disposed on the nozzle, the nozzle of the first cooling component is connected to the first spiral nozzle, and the nozzle of the second cooling component is connected to the second spiral nozzle.
7. The exhaust pipe according to claim 6, characterized in that: It also includes a controller and a pressure sensor for detecting the exhaust steam pressure at the lower end of the cylinder, and the pressure sensor and the valve are both electrically connected to the controller.
8. The exhaust pipe according to any one of claims 1 to 4, characterized in that: The collecting assembly includes a first collecting piece and a second collecting piece located in the cylinder, the first collecting piece and the second collecting piece are arranged in sequence from top to bottom, the first collecting piece and the inner wall of the cylinder have a first interval, the second collecting piece and the inner wall of the cylinder have a second interval, along the radial direction of the cylinder, the first interval and the second interval are staggered and connected to each other, the first interval and the second interval together constitute the air passage, and the second collecting piece is connected to the drain port.
9. A container, characterized in that: include: ontology; The exhaust chimney according to any one of claims 1 to 8, wherein the lower end of the exhaust chimney is connected to the main body.
10. A method for recovering waste heat from exhaust steam, applicable to the container according to claim 9, characterized in that: The steps include: The exhaust steam in the container rises into the cylinder through the gas passage of the collecting assembly, a part of the coolant is sprayed upward through the first spiral nozzle, rises together with the exhaust steam and exchanges heat, and the other part of the coolant is sprayed downward through the second spiral nozzle, and exchanges heat with the exhaust steam in the countercurrent; wherein, when the exhaust steam pressure at the lower end of the cylinder is not lower than the set pressure, the coolant flow rate of the second spiral nozzle is greater than the coolant flow rate of the first spiral nozzle, and when the pressure is lower than the set pressure, the coolant flow rates of the first spiral nozzle and the second spiral nozzle are equal; The cooling liquid moves downward after absorbing heat, and is collected by the collecting component and then discharged from the drain port for recovery.