A high efficiency steam exhaust recovery device
By designing water distribution components and a semi-cylindrical vent hood inside the tank to extend the waste steam flow path, the problems of complex structure and low waste steam recovery rate of existing waste steam recovery devices are solved, achieving efficient waste steam recovery and low-cost energy utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 内蒙古鄂尔多斯煤炭有限责任公司
- Filing Date
- 2025-07-22
- Publication Date
- 2026-07-07
AI Technical Summary
Existing waste steam recovery units are complex in structure, difficult to operate, and have high maintenance costs, and the waste steam recovery rate is low, resulting in energy waste and thermal pollution.
A high-efficiency waste steam recovery device was designed, comprising a tank, an inlet pipe, a water distribution assembly, a support mesh, a semi-cylindrical vent, an air inlet pipe, a drainage pipe, and an overpressure prevention pipe. The waste steam flow path is extended by the water distribution assembly and the vent, increasing the contact time between water and waste steam and improving the waste steam recovery rate.
It achieves efficient recovery of exhaust steam, reduces energy waste and thermal pollution, and lowers the operating and maintenance costs of the equipment.
Smart Images
Figure CN224470855U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste steam recovery technology, specifically to a high-efficiency waste steam recovery device. Background Technology
[0002] Drainage expansion tanks are key devices in the industrial equipment field used to treat high-pressure condensate from boilers and other equipment. By reducing pressure and expanding capacity, high-pressure condensate is separated into low-pressure steam (i.e., exhaust steam) and wastewater. During operation, a large amount of low-pressure steam (i.e., exhaust steam) is emitted into the air, which is especially noticeable in winter, causing significant energy loss and waste, and also contributing to thermal pollution of the atmosphere.
[0003] Currently, waste steam recovery is achieved by purchasing GFQ-type waste steam recovery units. However, the equipment purchase cost is high, and the GFQ-type waste steam recovery unit has a complex internal structure, including a film-forming chamber, waste steam absorption device, constant pressure fast discharge device, safety valve, flow guiding device, pressure stabilizing device, anti-cavitation device, decontamination device, water collection container, butterfly valve, flow rate control pipe, and high-temperature water transfer pump. This makes it difficult to operate and costly to maintain, and therefore unsuitable for enterprise use. Therefore, it is necessary to design a device that is easy to disassemble and assemble and has a high waste steam recovery rate. Utility Model Content
[0004] The purpose of this invention is to provide a high-efficiency waste steam recovery device.
[0005] The purpose of this utility model is achieved by the following technical solution: a high-efficiency waste steam recovery device, which includes a tank, a water inlet pipe, a water distribution assembly, a support mesh, a semi-cylindrical vent hood, an air inlet pipe, a drainage pipe, and an overpressure prevention pipe;
[0006] The water inlet pipe is connected to the upper side wall of the tank body, and the outlet end of the water inlet pipe passes through the side wall of the tank body and is placed downward inside the tank body; the horizontally arranged support mesh is fixedly connected to the lower part of the tank body, and the water distribution assembly is provided in the tank body between the outlet end of the water inlet pipe and the support mesh. The water distribution assembly includes an integrally formed water distribution plate, a main water supply pipe and a branch water supply pipe, and the water distribution plate is snapped onto the annular protrusion on the inner wall of the tank body.
[0007] The water distribution plate is vertically connected to the main water supply pipe in the middle. The bottom of the main water supply pipe is closed and detachably connected to the support mesh plate. Several sets of horizontally arranged water supply branch pipes are connected to the main water supply pipe at equal intervals along the axial direction. Each set of water supply branch pipes is evenly arranged on the side wall outside the main water supply pipe in the circumferential direction. Several downward-facing nozzles are fixed on the lower surface of each water supply branch pipe along the length direction. The nozzles are connected to the inside of the water supply branch pipe.
[0008] Along the axial direction of the main water supply pipe, a semi-cylindrical vent cover with an opening facing downward is provided on each group of water supply branch pipes, and two adjacent semi-cylindrical vent covers are staggered.
[0009] An air inlet pipe is connected to the side wall of the tank below the supporting mesh, a drain pipe is connected to the outlet at the bottom of the tank, and an overpressure prevention pipe is connected to the exhaust port at the top of the tank.
[0010] Preferably, the inlet of the air intake pipe is connected to the bottom of the exhaust steam discharge pipe of the hydrophobic expansion container.
[0011] Preferably, an isolation valve is installed on the exhaust gas pipe above the intake pipe, and a pressure sensor is installed inside the tank. The pressure sensor is electrically connected to the signal input terminal of the controller, and the signal output terminal of the controller is electrically connected to the isolation valve.
[0012] Preferably, a plurality of water distribution holes are evenly provided on the water distribution plate along the circumference.
[0013] Preferably, a plurality of ventilation holes are evenly provided on the top and side walls of the semi-cylindrical ventilation cover.
[0014] Preferably, the inlet of the water inlet pipe is connected to the outlet of the drainage header.
[0015] Preferably, the outlet of the drainage pipe is connected to the inlet of the condensate tank.
[0016] Preferably, the outlet of the overpressure prevention pipeline is connected to the exhaust steam discharge pipeline above the isolation valve.
[0017] Advantages of this invention: This invention is equipped with a water distribution assembly and several semi-cylindrical vent hoods. The water distribution assembly includes a water distribution plate, a main water supply pipe, and branch water supply pipes. After the water in the drain header enters the water distribution plate, most of the water enters each group of branch water supply pipes through the main water supply pipe. It is sprayed out through the corresponding nozzles and comes into contact with the exhaust steam flowing from bottom to top through each semi-cylindrical vent hood. The two adjacent semi-cylindrical vent hoods are staggered to extend the exhaust steam flow path as much as possible, thereby extending the contact time between water and exhaust steam and efficiently recovering the exhaust steam. A small portion of water drips down through the water distribution holes and comes into contact with a small portion of exhaust steam flowing from bottom to top along the side wall of the tank and the exhaust steam flowing out through each semi-cylindrical vent hood, reducing the exhaust steam discharge and turning the exhaust steam into condensate. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the structure of this utility model.
[0020] Figure 2 yes Figure 1 A magnified view of part A in the image.
[0021] Figure 3 This is a top view of the water distribution tray.
[0022] Figure 4 This is a schematic diagram of the structure after the semi-cylindrical vent cover and the water supply branch pipe are separated.
[0023] Figure 5 This is a partial structural diagram of the main water supply pipe and the branch water supply pipes.
[0024] Figure 6 This is a schematic diagram of a semi-cylindrical ventilation hood.
[0025] The components in the attached diagram are labeled as follows: Tank 1, Inlet pipe 2, Water distribution assembly 3, Water distribution tray 3.1, Water distribution hole 3.1.1, Main water supply pipe 3.2, Branch water supply pipe 3.3, Protrusion 3.3.1, Nozzle 3.3.2, Semi-cylindrical vent 4, Groove 4.1, Vent hole 4.2, Air inlet pipe 5, Drainage pipe 6, Overpressure protection pipe 7, Drainage header 8, Exhaust steam discharge pipe 9, Isolation valve 10, Pressure sensor 11, Controller 12, Drainage tank 13, Support mesh tray 14. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0027] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] like Figures 1-6 As shown, a high-efficiency waste steam recovery device includes a tank 1, a water inlet pipe 2, a water distribution assembly 3, a support mesh 14, a semi-cylindrical vent 4, an air inlet pipe 5, a drainage pipe 6, and an overpressure prevention pipe 7.
[0029] A water inlet pipe 2 is connected to the upper side wall of the tank body 1. The inlet end of the water inlet pipe 2 is connected to the outlet end of the drain header 8. The outlet end of the water inlet pipe 2 passes through the side wall of the tank body 1 and is placed downward inside the tank body 1. The water in the drain header 8 absorbs the heat of the exhaust steam, turning the exhaust steam into condensate. A horizontally arranged support mesh plate 14 is fixedly connected to the lower part of the tank body 1, which serves to support the water distribution assembly 3 and facilitate the passage of exhaust steam and water. The water distribution assembly 3 is installed in the tank body 1 between the outlet end of the water inlet pipe 2 and the support mesh plate 14. The water distribution assembly 3 includes an integrally formed water distribution plate 3.1, a main water supply pipe 3.2, and a branch water supply pipe 3.3. The water distribution plate 3.1 is snapped onto the annular protrusion on the inner wall of the tank body 1, which facilitates the disassembly and replacement of the water distribution assembly 3. Several water distribution holes are evenly opened along the circumference on the water distribution plate 3.1. 3.1.1 Water is evenly distributed from top to bottom into the tank 1 through the water distribution plate 3.1, making full contact with the exhaust steam flowing from bottom to top. A water supply main pipe 3.2 is vertically connected downward in the middle of the water distribution plate 3.1. The bottom of the water supply main pipe 3.2 is closed and detachably connected to the support mesh plate 14. Several sets of horizontally arranged water supply branch pipes 3.3 are connected to the water supply main pipe 3.2 at equal intervals along the axial direction. Each set of water supply branch pipes 3.3 is evenly arranged on the side wall outside the water supply main pipe 3.2 in the circumferential direction. Several downward-facing nozzles 3.3.2 are fixed at equal intervals along the length direction on the lower surface of each water supply branch pipe 3.3. The nozzles 3.3.2 are connected to the inside of the water supply branch pipes 3.3. Water is evenly distributed in each layer of the tank 1 through each set of water supply branch pipes 3.3 and the corresponding nozzles 3.3.2.
[0030] A semi-cylindrical vent 4 with its opening facing downwards is installed on each of the branch pipes 3.3 of the main water supply pipe 3.2 along the axial direction. Several protrusions 3.3.1 are fixed at equal intervals along the length of the upper surface of each branch pipe 3.3. Several grooves 4.1 corresponding to the protrusions are opened through the top surface of the semi-cylindrical vent 4. Each semi-cylindrical vent 4 is engaged with the corresponding branch pipe 3.3 by the cooperation of the protrusions 3.3.1 and the grooves 4.1. Several vent holes 4.2 are evenly opened on the top and side walls of the semi-cylindrical vent 4. The semi-cylindrical vent 4 slows down the flow rate of the exhaust steam, allowing the exhaust steam to fully contact the water. Two adjacent semi-cylindrical vent 4s are staggered to extend the flow path of the exhaust steam, thus prolonging the flow time of the exhaust steam within the tank 1. An air inlet pipe 5 is connected to the side wall of the tank 1 below the support mesh plate 14. The inlet of the air inlet pipe 5 is connected to the bottom of the exhaust steam discharge pipe 9 of the condensate expansion container. An isolation valve 10 is installed on the exhaust steam discharge pipe 9 above the air inlet pipe 5. The exhaust steam in the condensate expansion container is usually discharged directly from the exhaust steam discharge pipe 9. Now, the isolation valve 10 is closed, and the exhaust steam enters the tank 1 from the air inlet pipe 5. After passing through the support mesh plate 14, it enters each semi-cylindrical vent 4 and comes into contact with the water sprayed from the nozzles 3.3.2 of each group of water supply branch pipes 3.3, becoming condensate. A pressure sensor 11 is installed inside the tank 1. The pressure sensor 11 is electrically connected to the signal input terminal of the controller 12, and the signal output terminal of the controller 12 is electrically connected to the isolation valve 10. When the pressure sensor 11 detects that the pressure inside the tank 1 exceeds the set value, the controller 12 controls the isolation valve 10 to open, so that the exhaust steam in the condensate expansion container is preferentially discharged directly from the exhaust steam discharge pipe 9.
[0031] A drain pipe 6 is connected to the outlet at the bottom of the tank 1. The outlet of the drain pipe 6 is connected to the inlet of the condensate tank 13. Condensate and spray water are mixed and discharged from the drain pipe 6 into the condensate tank 13. At the same time, heat is recovered into the water for easy reuse.
[0032] An overpressure prevention pipe 7 is connected to the exhaust port at the top of the tank 1. The outlet of the overpressure prevention pipe 7 is connected to the exhaust steam discharge pipe 9 above the isolation valve 10. After the exhaust steam comes into full contact with water, the non-condensable gas enters the exhaust steam discharge pipe 9 through the overpressure prevention pipe 7 for venting. At the same time, the overpressure prevention pipe 7 plays a pressure relief role.
[0033] Working process: Water in the condensate drain pipe 8 is transported from the inlet pipe 2 to the water distribution plate 3.1 of the water distribution assembly 3. Most of the water enters the various water distribution branch pipes 3.3 through the main water supply pipe 3.2 and is sprayed out through the corresponding nozzles 3.3.2; a small portion of the water in the water distribution plate 3.1 drips down through the water distribution holes 3.1.1; at the same time, the isolation valve 10 is closed, and the exhaust steam in the condensate drain expansion tank enters the lower part of the tank 1 through the air inlet pipe 5. Most of the exhaust steam passes from bottom to top through the water sprayed from each semi-cylindrical vent 4 and the nozzles 3.3.2. The two adjacent semi-cylindrical vent hoods 4 are staggered to extend the flow path of the exhaust steam as much as possible, so that the water and exhaust steam can fully contact and absorb heat. A small part of the exhaust steam comes into contact with the water dripping from the water distribution hole 3.1.1 along the side wall of the tank 1 from bottom to top, so that the exhaust steam becomes condensate and the exhaust steam is reduced. After absorbing heat, the water mixes with the condensate and falls into the bottom of the tank 1. It enters the condensate tank 13 through the drainage pipe 6 for reuse. The non-condensable gas generated after the steam becomes condensate enters the exhaust steam discharge pipe 9 through the overpressure prevention pipe 7 for venting.
[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A high-efficiency waste steam recovery device, characterized in that, It includes a tank body, water inlet pipe, water distribution assembly, support mesh, semi-cylindrical vent hood, air inlet pipe, drainage pipe, and overpressure prevention pipe; The water inlet pipe is connected to the upper side wall of the tank body, and the outlet end of the water inlet pipe passes through the side wall of the tank body and is placed downward inside the tank body; the horizontally arranged support mesh is fixedly connected to the lower part of the tank body, and the water distribution assembly is provided in the tank body between the outlet end of the water inlet pipe and the support mesh. The water distribution assembly includes an integrally formed water distribution plate, a main water supply pipe and a branch water supply pipe, and the water distribution plate is snapped onto the annular protrusion on the inner wall of the tank body. The water distribution plate is vertically connected to the main water supply pipe in the middle. The bottom of the main water supply pipe is closed and detachably connected to the support mesh plate. Several sets of horizontally arranged water supply branch pipes are connected to the main water supply pipe at equal intervals along the axial direction. Each set of water supply branch pipes is evenly arranged on the side wall outside the main water supply pipe in the circumferential direction. Several downward-facing nozzles are fixed on the lower surface of each water supply branch pipe along the length direction. The nozzles are connected to the inside of the water supply branch pipe. Along the axial direction of the main water supply pipe, a semi-cylindrical vent cover with an opening facing downward is provided on each group of water supply branch pipes, and two adjacent semi-cylindrical vent covers are staggered. An air inlet pipe is connected to the side wall of the tank below the supporting mesh, a drain pipe is connected to the outlet at the bottom of the tank, and an overpressure prevention pipe is connected to the exhaust port at the top of the tank.
2. The high-efficiency waste steam recovery device according to claim 1, characterized in that, The inlet of the air intake pipe is connected to the bottom of the exhaust gas discharge pipe of the hydrophobic expansion container.
3. The high-efficiency waste steam recovery device according to claim 2, characterized in that, An isolation valve is installed on the exhaust gas pipe above the intake pipe, and a pressure sensor is installed inside the tank. The pressure sensor is electrically connected to the signal input terminal of the controller, and the signal output terminal of the controller is electrically connected to the isolation valve.
4. The high-efficiency waste steam recovery device according to claim 1, characterized in that, Several water distribution holes are evenly distributed along the circumference of the water distribution plate.
5. A high-efficiency waste steam recovery device according to claim 1 or 4, characterized in that, Several ventilation holes are evenly provided on the top and side walls of the semi-cylindrical ventilation hood.
6. The high-efficiency waste steam recovery device according to claim 1, characterized in that, The inlet of the water inlet pipe is connected to the outlet of the drainage header.
7. The high-efficiency waste steam recovery device according to claim 1, characterized in that, The outlet of the drainage pipe is connected to the inlet of the condensate tank.
8. The high-efficiency waste steam recovery device according to claim 3, characterized in that, The outlet of the overpressure prevention pipeline is connected to the exhaust steam discharge pipeline above the isolation valve.