Boiler expander exhaust steam recovery device

Abstract

The utility model relates to a steam recovery technology field, a boiler expansion vessel steam recovery device, including drain expansion vessel, still include: install in the drain expansion vessel top's exhaust pipe, the bottom fixed connection of drain expansion vessel has water tank, the outlet bushing of water tank has condensate pump, set up in the cooling mechanism of condensate pump one end, the inside installation of water tank has the adjusting mechanism, the utility model discloses the cooperation of cooling mechanism and adjusting mechanism can be according to the water level inside water tank and adjust the working condition of high load area shower nozzle, make condensate water quantity and system carrying capacity accurate matching, prevent the liquid level anomaly caused by the overwatering surplus, realize steam full recovery, can open pressure relief automatically under the action of heavy hammer valve when system overpressure, guarantee that system will not exist the phenomenon of pressure holding, solved the problem that the resource waste of the existing device causes because of the formation speed of condensate water when using cannot be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of waste steam recovery technology, specifically a waste steam recovery device for boiler expansion tanks. Background Technology

[0002] In thermal power generation, industrial boilers and other thermal systems, the condensate expansion tank is a key device for realizing high-pressure condensate expansion and pressure reduction, and flash evaporation recovery. Its core function is to convert the high-pressure condensate generated by the system into secondary steam and condensate, recover water resources and low-grade heat energy, and reduce energy waste.

[0003] However, in some existing steam recovery systems of condensate expansion tanks, the amount of spray cooling water and generated cooling water far exceeds the boiler's makeup water capacity limit during operation. This results in the system being unable to fully absorb the excess condensate and being in a state of partial recovery and partial discharge, causing serious waste of energy and water resources due to the discharge of steam. Utility Model Content

[0004] The purpose of this utility model is to provide a waste steam recovery device for boiler expansion tanks, which achieves full recovery of waste steam through the cooperation of a cooling mechanism and a regulating mechanism.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a boiler expansion tank exhaust steam recovery device, comprising a drain expansion tank, and further comprising: An exhaust pipe is installed on the top of the hydrophobic expansion container, and a counterweight valve is provided at the top of the exhaust pipe. A water tank is fixedly connected to the bottom of the hydrophobic expansion container, and a condensate pump is connected to the outlet of the water tank. A cooling mechanism is installed at one end of the condensate pump, and an adjustment mechanism is installed inside the water tank.

[0006] Preferably, the cooling mechanism includes a main pipeline sleeved at the outlet of the condensate pump, and an annular pipeline fixedly connected to the other end of the main pipeline, with a nozzle fixedly connected to the inner wall of the annular pipeline.

[0007] Preferably, the adjusting mechanism includes a support fixedly connected to the inner wall of the water tank, a connecting rod provided on the surface of the support, a float fixedly connected to one end of the connecting rod, a branch pipe sleeved inside the main pipe, and a baffle fixedly connected to the other end of the connecting rod.

[0008] Preferably, the nozzles are arranged in a ring along the surface of the annular pipe, and a sealing device is provided at the connection between the nozzles and the exhaust pipe.

[0009] Preferably, the middle part of the branch pipe has a square structure design, and its height is greater than the height of the baffle.

[0010] Preferably, the float is spherical in shape and made of stainless steel.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the cooperation of a cooling mechanism and an adjustment mechanism, can adjust the working state of the nozzles in the high and low load zones according to the water level inside the water tank under the action of the internal components of the adjustment mechanism. This allows for precise matching of the condensate volume with the system's carrying capacity. It can prevent insufficient condensation from causing excessive pressure inside the condensate expansion container, which would lead to the discharge of exhaust steam. It can also prevent excessive water replenishment from causing abnormal liquid level, thereby avoiding the phenomenon of partial recovery and partial discharge and achieving full recovery of exhaust steam. At the same time, under the action of the counterweight valve, it can automatically open to release pressure when the system is overpressured, ensuring that there is no pressure buildup in the system and playing a safety protection role. This solves the problem of resource waste caused by the inability to adjust the rate of condensate formation in existing devices. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of a partial cross-sectional three-dimensional unfolded structure of the present invention; Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the present invention; Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the present invention; Figure 5 This utility model Figure 4 Enlarged structural diagram at point A; Figure 6 This is a partial cross-sectional three-dimensional structural diagram of the present invention.

[0013] In the diagram: 1. Drainage expansion container; 2. Exhaust pipe; 3. Counterweight valve; 4. Water tank; 5. Condensate pump; 6. Cooling mechanism; 61. Main pipeline; 62. Ring pipeline; 63. Nozzle; 7. Adjustment mechanism; 71. Support; 72. Connecting rod; 73. Float; 74. Branch pipeline; 75. Baffle. Detailed Implementation

[0014] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0015] Please see Figure 1-6 As shown, a boiler expansion container exhaust steam recovery device includes a condensate expansion container 1, which is installed on the ground to receive high-pressure condensate and expand and depressurize it, so that the condensate flashes out secondary steam and condensate is separated out at the same time.

[0016] The top of the hydrophobic expansion container 1 is equipped with an exhaust pipe 2, which is used to discharge the gas separated inside the hydrophobic expansion container 1.

[0017] A counterweight valve 3 is installed at the top of the exhaust pipe 2. The counterweight valve 3 is used to block the outlet of the exhaust pipe 2. When the internal pressure of the hydrophobic expansion container 1 reaches the set value, the counterweight valve 3 will open automatically.

[0018] A water tank 4 is fixedly connected to the bottom of the hydrophobic expansion container 1. The water tank 4 is used to store condensate.

[0019] A condensate pump 5 is connected to the outlet of water tank 4, which provides power for the power circulation of the device.

[0020] A cooling mechanism 6 is provided at one end of the condensate pump 5. The cooling mechanism 6 includes a main pipe 61 sleeved at the outlet of the condensate pump 5, and an annular pipe 62 fixedly connected to the other end of the main pipe 61. There are two annular pipes 62. Spray nozzles 63 are fixedly connected to the inner wall of the annular pipes 62. There are several spray nozzles 63. The spray nozzles 63 are fixed to the inner wall of the exhaust pipe 2. With the cooperation of the condensate pump 5, the condensate collected inside the water tank 4 is introduced into the interior of the annular pipes 62 through the main pipe 61. Then, the condensate inside the annular pipes 62 is sprayed through the spray nozzles 63. The cooler condensate enters the interior of exhaust pipe 2, allowing it to come into contact with the hotter flash vapor. Under this action, the flash vapor cools and forms condensate, which flows downward into the water tank 4, thus recovering the exhaust vapor. At the same time, the condensate sprayed from nozzle 63 is in the form of aerosol, which increases the contact area between the condensate and the flash vapor inside exhaust pipe 2, thereby increasing the speed at which the flash vapor turns into condensate. The aerosol condensate can also be evenly distributed throughout the flow field inside exhaust pipe 2 with the airflow, thus preventing the flash vapor from escaping from the edge areas of exhaust pipe 2 and achieving full-area condensation.

[0021] The nozzles 63 are distributed in a ring along the surface of the annular pipe 62, and a sealing device is provided at the connection between the nozzles 63 and the exhaust pipe 2. The area where the nozzles 63 are located is a high-load area.

[0022] An adjustment mechanism 7 is installed inside the water tank 4. The adjustment mechanism 7 includes a support 71 fixedly connected to the inner wall of the water tank 4. A connecting rod 72 is provided on the surface of the support 71. The connecting rod 72 has two sections, one section rotates on the surface of the support 71, and the other section slides against the support 71. The connecting rod 72 is slidably connected to the inner wall of the water tank 4. A float 73 is fixedly connected to one end of the connecting rod 72. A branch pipe 74 is sleeved inside the main pipe 61. The other end of the branch pipe 74 is fixedly connected to the annular pipe 62. A baffle 75 is fixedly connected to the other end of the connecting rod 72. The baffle 75 is slidably connected to the inner wall of the branch pipe 74. The float 73... In coordination with the water level inside the water tank 4, the up-and-down movement of the float 73 can be converted into the up-and-down movement of the baffle 75 via the connecting rod 72. The position of the baffle 75 controls whether the condensate flows inside the branch pipe 74, thereby controlling whether the nozzle 63 in the low-load area works by controlling the flow inside the branch pipe 74. Under this action, the device can control the rate at which the flash steam inside the exhaust pipe 2 turns into condensate according to the amount of condensate inside the water tank 4, thereby preventing the condensate from forming too quickly inside the exhaust pipe 2 and causing too much condensate inside the water tank 4, thus avoiding the condensate inside the water tank 4 from being discharged to the outside and wasting it.

[0023] The connecting rod 72 consists of two rods that are movably connected to each other. The inner cavity of the rod on one side of the float 73 is movably connected to the surface of the rod on the other side. Under this action, the rod on one side of the float 73 can rotate upward and squeeze the rod on the other side, thereby enabling it to drive the baffle 75 to move downward. After the float 73 is reset, the baffle 75 is pulled upward by the internal tension of the rod on one side near the float 73 through the rod on the other side, thereby completing the movement of the baffle 75.

[0024] With the cooperation of float 73 and connecting rod 72, when the water level inside water tank 4 is higher than the set value, the buoyancy of condensate water drives float 73 to move upward. Float 73 drives connecting rod 72 to rotate along the surface of support 71. During this process, the other end of connecting rod 72 drives baffle 75 to slide downward along the inside of branch pipe 74, thereby cutting off the passage inside branch pipe 74. At this time, only nozzle 63 in the high-load area works in exhaust pipe 2. With the amount of exhaust steam entering condensate expansion container 1 remaining unchanged, the contact area between condensate water and flash steam decreases, and the generation rate of condensate water in exhaust pipe 2 decreases. Consequently, the amount of condensate water entering condensate expansion container 1 is less than the pumping rate of condensate water pump 5, ultimately causing the condensate water level in condensate expansion container 1 to drop to the preset position.

[0025] When the water level inside the water tank 4 is lower than the set value, the amount of condensate in the water tank 4 is insufficient. At this time, the water level drops, and the float ball 73 drops synchronously with the water level. Through the cooperation of the support 71 and the connecting rod 72, the float ball 73 drives the connecting rod 72 to rotate in the opposite direction along the surface of the support 71. Then, through the connecting rod 72, the baffle 75 slides upward along the inner wall of the branch pipe 74. At this time, the internal channel of the branch pipe 74 is opened, and the nozzle 63 in the low load area starts to work to increase the contact area between the condensate and the flash steam in the exhaust pipe 2, accelerate the generation of condensate in the condensate expansion container 1, and finally raise the condensate level in the water tank 4 to the preset position.

[0026] The area where nozzle 63 is located is a low-load zone.

[0027] The middle part of the branch pipe 74 has a square structure design, and its height is greater than that of the baffle 75.

[0028] The float 73 has a spherical structure and is made of stainless steel.

[0029] This device is only a waste steam recovery device. It only recovers the condensate after the waste steam is decomposed inside the hydrophobic expansion container 1, and discharges the recovered condensate into the interior of the hydrophobic expansion container 1 in the form of mist to cool the waste steam. This device needs to be connected to another set of drainage devices to discharge sewage.

[0030] It is worth noting that the technical features such as the hydrophobic expansion container 1 proposed in this technical solution should be regarded as prior art. The specific structure, working principle, and possible control methods and spatial arrangement of these technical features can be selected using conventional methods in this field. This technical solution will not elaborate further.

[0031] Working principle: After receiving high-pressure condensate, the condensate expansion container 1 expands and reduces pressure to cause secondary steam to flash out of the condensate. The condensate flows into the bottom water tank 4 for temporary storage. The condensate pump 5 draws the condensate from the water tank 4 and transports it through the main pipeline 61 to the annular pipeline 62 in the exhaust pipe 2. Under the continuous spray of the nozzle 63, the condensate comes into contact with the rising secondary steam and condenses. The resulting condensate flows back to the condensate expansion container 1, completing the basic recycling cycle.

[0032] When the water level in tank 4 is higher than the set value, the float 73 rises due to buoyancy, and drives the baffle 75 to move down through the connecting rod 72, cutting off the branch pipe 74. The low-load area spray head 63 stops working, and only the high-load area sprays. The amount of condensate generated decreases, and under the continuous pumping action of the condensate pump 5, the water level drops back to the preset value.

[0033] When the water level in tank 4 is lower than the set value, the float ball 73 descends with the water level, causing the baffle 75 to move upward, opening the branch pipe 74, activating the low-load zone spray head 63, expanding the spray range to improve condensation efficiency, and accelerating the generation of condensate until the water level rises back to the set value.

[0034] Meanwhile, the counterweight valve 3 at the top of the exhaust pipe 2 is automatically controlled by pressure. When the pressure inside the condensate expansion container 1 exceeds the limit, it opens to release pressure and closes after the pressure is restored, ensuring system safety while reducing exhaust steam loss.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A boiler expansion vessel exhaust steam recovery device, comprising a condensate expansion vessel (1), characterized in that, Also includes: An exhaust pipe (2) is installed on the top of the hydrophobic expansion container (1). A counterweight valve (3) is provided on the top of the exhaust pipe (2). A water tank (4) is fixedly connected to the bottom of the hydrophobic expansion container (1). A condensate pump (5) is connected to the outlet of the water tank (4). A cooling mechanism (6) is installed at one end of the condensate pump (5), and an adjustment mechanism (7) is installed inside the water tank (4).

2. The boiler expansion vessel exhaust steam recovery device according to claim 1, characterized in that: The cooling mechanism (6) includes a main pipeline (61) sleeved at the outlet of the condensate pump (5), and an annular pipeline (62) fixedly connected to the other end of the main pipeline (61). A nozzle (63) is fixedly connected to the inner wall of the annular pipeline (62).

3. A boiler expansion vessel exhaust steam recovery device according to claim 2, characterized in that: The adjustment mechanism (7) includes a support (71) fixedly connected to the inner wall of the water tank (4), a connecting rod (72) is provided on the surface of the support (71), a float (73) is fixedly connected to one end of the connecting rod (72), a branch pipe (74) is sleeved inside the main pipe (61), and a baffle (75) is fixedly connected to the other end of the connecting rod (72).

4. A boiler expansion vessel exhaust steam recovery device according to claim 2, characterized in that: The nozzle (63) is distributed in a ring along the surface of the annular pipe (62), and a sealing device is provided at the connection between it and the exhaust pipe (2).

5. A boiler expansion vessel exhaust steam recovery device according to claim 3, characterized in that: The middle part of the branch pipe (74) is designed with a square structure, and its height is greater than that of the baffle (75).

6. A boiler expansion vessel exhaust steam recovery device according to claim 3, characterized in that: The float (73) is spherical in shape and made of stainless steel.

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