A steam lock breaking device and method for a steam system trap

Abstract

The present application relates to a kind of steam lock breaking device and breaking method of steam system drain valve.The dryer of the breaking device is connected with external equipment by drain passage, float ball type drain valve is arranged on drain passage, temperature sensor is arranged on drain passage, temperature sensor is used to obtain the real-time temperature information of drain passage, exhaust hole is arranged on float ball type drain valve, exhaust hole is communicated with exhaust duct, exhaust valve is arranged on exhaust duct, controller is connected with temperature sensor and exhaust valve respectively, and controller controls exhaust valve to open according to the real-time temperature information of drain passage obtained by temperature sensor.The present application solves the steam lock problem commonly seen in the drain of dryer, ensures the reliable and stable operation of dryer, compared with the hole on the body of drain valve and the installation of exhaust valve, or the steam lock breaking scheme of keeping certain leakage amount by built-in exhaust valve of drain valve, the present application can greatly improve the drain efficiency of drain valve, and save a lot of steam energy.

Description

Technical Field

[0001] This invention belongs to the field of water treatment technology, and particularly relates to a steam lock breaking device and method for steam system steam traps. Background Technology

[0002] In existing technologies, most dryers rely on siphon pipes and condensate drain pipes to guide a mixture of steam and condensate into a float-type steam trap. The float-type steam trap then discharges the condensate based on density difference, while retaining the steam. If a large amount of steam from the mixture enters the steam trap and its connected pipes, obstructing the condensate drain channel, condensate cannot drain into the trap, creating a vapor lock. This vapor lock can only be broken after the steam in the channel pre-condenses into liquid water. If even a small amount of non-condensable gases from the steam enters the drain channel, it will be difficult for the channel to break the vapor lock on its own within a short time. Vapor lock in the drain channel significantly reduces the dryer's heat exchange efficiency, affecting equipment capacity. Furthermore, the condensate trapped in the dryer is prone to water hammer, directly impacting the dryer's safety.

[0003] Most float-type steam traps and their associated piping systems on the market lack reliable measures to break steam lock. A few manufacturers install air vents by drilling holes in the trap body or embedding them within the trap itself. The principle is the same: maintaining a certain opening of the vent valve to create a certain leakage, ensuring that steam and condensate in the mixture are constantly discharged, thus breaking steam lock. However, this method results in the trap still venting even when there is no steam lock issue, sacrificing its drainage efficiency and causing significant steam waste. Furthermore, adjusting the vent valve opening is difficult; a smaller opening fails to break steam lock, while a larger opening exacerbates steam waste.

[0004] Therefore, existing technologies need to be improved. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a steam lock breaking device and method for steam system steam traps, so as to solve the technical problem that the use of built-in air vent valves to break steam lock in float-type steam traps results in the sacrifice of steam condensation efficiency and serious steam waste.

[0006] The technical solution of this invention is as follows:

[0007] On one hand, the present invention provides a steam lock breaking device for steam system steam traps, applicable to the breaking of steam locks in steam system steam traps. The breaking device includes a dryer, a float-type steam trap, and a drainage channel. The dryer is connected to an external device through the drainage channel, and the float-type steam trap is disposed on the drainage channel. The breaking device is characterized by comprising:

[0008] A temperature sensor is disposed on the hydrophobic channel and is used to acquire real-time temperature information of the hydrophobic channel.

[0009] A vent is provided on the float-type drain valve, and the vent is connected to a vent pipe, on which a vent valve is provided;

[0010] The controller is connected to the temperature sensor and the vent valve respectively. The controller controls the vent valve to open based on the real-time temperature information of the hydrophobic channel obtained by the temperature sensor.

[0011] Furthermore, the drainage channel includes a pre-valve pipe and a post-valve pipe, the float-type drain valve has a drain valve inlet and a drain valve outlet, the drain valve inlet of the float-type drain valve is connected to the conveying part of the dryer through the pre-valve pipe, and the drain valve outlet of the float-type drain valve is connected to an external device through the post-valve pipe.

[0012] Furthermore, the temperature sensor includes a first temperature sensor, which is disposed on the pipeline upstream of the valve. The first temperature sensor is used to acquire real-time temperature information of the pipeline upstream of the valve, and the first temperature sensor is connected to the controller.

[0013] Furthermore, the temperature sensor also includes a second temperature sensor, which is disposed on the downstream pipeline of the valve. The second temperature sensor is used to acquire real-time temperature information of the downstream pipeline and is connected to the controller.

[0014] Furthermore, the breaking device also includes:

[0015] A steam inlet pipe is connected to the dryer;

[0016] A third temperature sensor is installed on the steam inlet pipe. The third temperature sensor is used to acquire real-time temperature information of the steam inlet pipe. The third temperature sensor is connected to the controller.

[0017] Furthermore, the exhaust pipe is connected to the downstream pipe of the valve.

[0018] Furthermore, the opening degree of the exhaust valve is adjustable.

[0019] Furthermore, the dryer includes a cylindrical body and a siphon tube. The cylindrical body is connected to the hydrophobic channel via a rotary joint. One end of the siphon tube is disposed inside the dryer, and the other end of the siphon tube passes through the rotary joint.

[0020] Furthermore, the steam inlet pipe and the rotary joint are connected.

[0021] On the other hand, the present invention also provides a method for breaking steam lock in a steam system steam trap, the method comprising:

[0022] The real-time temperature information of the hydrophobic channel is obtained by a temperature sensor installed on the hydrophobic channel, and the real-time temperature information is sent to the controller.

[0023] The controller compares the real-time temperature information on the hydrophobic channel with a set fault temperature value to determine a control strategy. The exhaust valve receives and executes the control strategy. In the control strategy, the filtered average value of the real-time temperature of the first temperature sensor over one minute is Z1, the filtered average value of the real-time temperature of the second temperature sensor over one minute is Z2, and the filtered average value of the real-time temperature of the third temperature sensor over one minute is Z3, where Z3-Z1 = a and Z3-Z2 = b. The control strategy is shown in Table 1.

[0024]

[0025] Table 1.

[0026] The beneficial effects of the present invention include at least the following:

[0027] This invention discloses a steam lock breaking device and method for steam system steam traps. By comparing the temperature of the steam trap channel with a set fault temperature value, the opening of the exhaust valve located in the exhaust pipe is controlled. The exhaust pipe is connected to the exhaust port of the float-type steam trap, which discharges the gas that causes steam lock. This solves the common steam lock problem in dryer steam traps, ensuring the reliable and stable operation of the dryer. Compared with steam lock breaking solutions that involve opening a hole in the steam trap body and installing an air vent valve, or having an air vent valve built into the steam trap to maintain a certain leakage, this invention can greatly improve the steam trap's steam trap efficiency and save a lot of steam energy. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the steam lock breaking device for a steam system steam trap in this embodiment. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] First, this embodiment discloses a steam lock breaking device for steam system steam traps, which is suitable for breaking steam locks in steam system steam traps.

[0032] Figure 1 This is a schematic diagram of the steam lock breaking device for a steam system steam trap according to this embodiment. Figure 1 The breaking device includes a dryer 1, a float-type drain valve 4, and a drain channel. The dryer 1 is connected to an external device through the drain channel, and the float-type drain valve 4 is installed on the drain channel.

[0033] Furthermore, combined Figure 1 In this embodiment, the dryer 1 can be a rotary dryer, which includes a cylinder 1-1. The cylinder 1-1 is connected to the drainage channel through a rotary joint 1-3. One end of the siphon pipe 1-2 is located inside the dryer 1, and the other end of the siphon pipe 1-2 passes through the rotary joint 1-3. Under normal operating conditions, the mixture of steam and condensate is introduced into the float-type drain valve 4 through the siphon pipe 1-2, the rotary joint 1-3, and the drainage channel. The float-type drain valve 4 discharges the condensate to external equipment for processing based on the density difference principle, while the steam is retained. This is prior art, and will not be described in detail in this embodiment.

[0034] Combination Figure 1 The breaking device in this embodiment also includes a temperature sensor, an exhaust pipe 7, an exhaust valve 8, and a controller 9. The temperature sensor is installed on the drainage channel and is used to obtain the real-time temperature information of the drainage channel. The float-type drainage valve 4 is provided with an exhaust hole 4-1, which is connected to the exhaust pipe 7. The exhaust pipe 7 is provided with an exhaust valve 8. The controller 9 is connected to the temperature sensor and the exhaust valve 8 respectively. The controller 9 controls the exhaust valve 8 to open according to the real-time temperature information of the drainage channel obtained by the temperature sensor.

[0035] Combination Figure 1In this embodiment, the drainage channel includes a pre-valve pipe 2 and a post-valve pipe 5. The float-type steam trap 4 has a steam trap inlet 4-2 and a steam trap outlet 4-3. The steam trap inlet 4-2 of the float-type steam trap 4 is connected to the conveying section of the dryer 1 through the pre-valve pipe 2, and the steam trap outlet 4-3 of the float-type steam trap 4 is connected to external equipment through the post-valve pipe 5. The mixture of steam and condensate is first introduced into the float-type steam trap 4 through the pre-valve pipe 2. The float-type steam trap 4 discharges the condensate based on the density difference principle and guides it to the external equipment for processing through the post-valve pipe 5.

[0036] Combination Figure 1 In this embodiment, the temperature sensor includes a first temperature sensor 3, which is installed on the pipeline 2 before the valve. The first temperature sensor 3 is used to obtain the real-time temperature information of the pipeline 2 before the valve. The first temperature sensor 3 is connected to the controller 9, so that the real-time temperature information of the pipeline 2 before the valve can be sent to the controller 9, and the controller 9 can control the exhaust valve 8.

[0037] Furthermore, combined Figure 1 The temperature sensor in this embodiment also includes a second temperature sensor 6, which is installed on the downstream pipeline 5. The second temperature sensor 6 is used to obtain the real-time temperature information of the downstream pipeline 5. The second temperature sensor 6 is connected to the controller 9, so that the real-time temperature information of the upstream pipeline 2 can be sent to the controller 9, and the controller 9 can control the exhaust valve 8.

[0038] Furthermore, combined Figure 1 The breaking device in this embodiment also includes a steam inlet pipe 10 and a third temperature sensor 11. The steam inlet pipe 10 is connected to the dryer 1. The third temperature sensor 11 is installed on the steam inlet pipe 10. The third temperature sensor 11 is used to obtain the real-time temperature information of the steam inlet pipe 10, and then obtain the real-time temperature information of the output end of the dryer 1. The third temperature sensor 11 is connected to the controller 9, so that the real-time temperature information of the output end of the dryer 1 can be sent to the controller 9.

[0039] Specifically, in this embodiment, the steam inlet pipe 10 and the rotary joint 1-3 are connected.

[0040] Combination Figure 1 In this embodiment, the exhaust pipe 7 is connected to the downstream pipe 5, so that the gas discharged from the float-type steam trap 4 can be introduced into the downstream pipe 5 and enter the external equipment for processing.

[0041] Furthermore, based on the aforementioned steam lock breaking device for steam system steam traps, the present invention also provides a steam lock breaking method for steam system steam traps, the method comprising:

[0042] The real-time temperature information of the drainage channel is obtained by a temperature sensor installed on the drainage channel and sent to the controller 9.

[0043] The controller 9 receives real-time temperature information on the hydrophobic channel from the temperature sensor and compares the acquired real-time temperature information on the hydrophobic channel with the set fault temperature value.

[0044] The controller 9 compares the real-time temperature information on the drainage channel with the set fault temperature value to determine the control strategy. The exhaust valve 8 receives and executes the control strategy. In the control strategy, the filtered average value of the real-time temperature of the first temperature sensor 3 within 1 minute is Z1, the filtered average value of the real-time temperature of the second temperature sensor 6 within 1 minute is Z2, and the filtered average value of the real-time temperature of the third temperature sensor 11 within 1 minute is Z3. Z3-Z1 = a, Z3-Z2 = b. The control strategy is as shown in Table 1.

[0045]

[0046] Table 1

[0047] In summary, the steam lock breaking device and method for steam system steam traps disclosed in this embodiment controls the opening of the exhaust valve installed in the exhaust pipe by comparing the temperature of the steam trap channel with a set fault temperature value. The exhaust pipe is connected to the exhaust port of the float-type steam trap, which discharges the gas that causes steam lock. This solves the common steam lock problem in dryer steam traps and ensures the reliable and stable operation of the dryer. Compared with steam lock breaking schemes that involve opening holes in the steam trap body and installing an air vent valve, or having an air vent valve built into the steam trap to maintain a certain leakage, this invention can greatly improve the steam trap's steam trap efficiency and save a lot of steam energy.

[0048] The above-described embodiments are preferred embodiments of the present invention and are only used to facilitate the illustration of the present invention. They are not intended to limit the present invention in any way. Any person skilled in the art who makes local modifications or alterations to the technical content disclosed in the present invention without departing from the scope of the technical features of the present invention shall still fall within the scope of the technical features of the present invention.

Claims

1. A method for breaking steam lock in a steam trap of a steam system, characterized in that, The method described above is applied to a steam lock breaking device for steam system steam traps. The breaking device is suitable for breaking the steam lock in steam system steam traps. The breaking device includes a dryer (1), a float-type steam trap (4), and a drainage channel. The dryer (1) is connected to external equipment via the drainage channel. The float-type steam trap (4) is installed on the drainage channel. The breaking device includes: A temperature sensor is disposed on the hydrophobic channel and is used to acquire real-time temperature information of the hydrophobic channel. Vent hole (4-1), the vent hole (4-1) is provided on the float-type drain valve (4), the vent hole (4-1) is connected to the vent pipe (7), and the vent pipe (7) is provided with an vent valve (8). The controller (9) is connected to the temperature sensor and the exhaust valve (8) respectively. The controller controls the exhaust valve (8) to open according to the real-time temperature information of the hydrophobic channel obtained by the temperature sensor. The drainage channel includes a pre-valve pipe (2) and a post-valve pipe (5). The float-type drain valve (4) has a drain valve inlet (4-2) and a drain valve outlet (4-3). The drain valve inlet (4-2) of the float-type drain valve (4) is connected to the conveying part of the dryer (1) through the pre-valve pipe (2). The drain valve outlet (4-3) of the float-type drain valve (4) is connected to an external device through the post-valve pipe (5). The temperature sensor includes a first temperature sensor (3), which is installed on the pipeline (2) before the valve. The first temperature sensor (3) is used to obtain the real-time temperature information of the pipeline (2) before the valve. The first temperature sensor (3) is connected to the controller (9). The temperature sensor also includes a second temperature sensor (6), which is disposed on the downstream pipeline (5). The second temperature sensor (6) is used to obtain the real-time temperature information of the downstream pipeline (5). The second temperature sensor (6) is connected to the controller (9). Steam inlet pipe (10) is connected to the dryer (1); The third temperature sensor (11) is installed on the steam inlet pipe (10) and is used to obtain the real-time temperature information of the steam inlet pipe (10). The third temperature sensor (11) is connected to the controller (9). The removal method includes: The real-time temperature information of the hydrophobic channel is obtained by a temperature sensor installed on the hydrophobic channel, and the real-time temperature information is sent to the controller (9). The controller (9) receives the real-time temperature information on the hydrophobic channel sent by the temperature sensor and compares the acquired real-time temperature information on the hydrophobic channel with the set fault temperature value. The controller (9) compares the real-time temperature information on the hydrophobic channel with the set fault temperature value to determine a control strategy. The exhaust valve (8) receives and executes the control strategy. In the control strategy, the filtered average value of the real-time temperature of the first temperature sensor (3) within 1 minute is Z1, the filtered average value of the real-time temperature of the second temperature sensor (6) within 1 minute is Z2, and the filtered average value of the real-time temperature of the third temperature sensor (11) within 1 minute is Z3. Z3-Z1=a, Z3-Z2=b. The control strategy is as follows: When a < K1 and b < K2, the controller determines that there is no fault and the exhaust valve remains closed; When a < K1 and b ≥ K2, the controller determines that the steam trap has a steam lock fault, and the exhaust valve opens for t1 seconds and then closes. When a≥K1 and b<K2, the controller determines that there is a steam lock fault in the pipeline between the siphon inlet and the drain valve inlet, and the exhaust valve opens for t2 seconds and then closes. When a≥K1 and b≥K2, the controller determines that there is a steam lock fault in both the pipe between the siphon inlet and the steam trap inlet, and the exhaust valve opens and closes after t3 seconds; When a≥K1 or b≥K2, and the number of times the exhaust valve (8) is opened and closed exceeds 3, the controller judges that the drain valve itself is faulty, issues an alarm signal, and intervenes manually. Where K1 is the first temperature threshold and K2 is the second temperature threshold.

2. The method for breaking the steam lock of a steam trap in a steam system according to claim 1, characterized in that, The exhaust pipe (7) and the valve downstream pipe (5) are connected.

3. The method for breaking the steam lock of a steam trap in a steam system according to claim 1, characterized in that, The opening degree of the exhaust valve (8) is adjustable.

4. The method for breaking the steam lock of a steam system steam trap according to claim 3, characterized in that, The dryer (1) includes a cylinder (1-1) and a siphon tube (1-2). The cylinder (1-1) is connected to the hydrophobic channel through a rotary joint (1-3). One end of the siphon tube (1-2) is located inside the dryer (1), and the other end of the siphon tube (1-2) passes through the rotary joint (1-3).

5. The method for breaking the steam lock of a steam system steam trap according to claim 4, characterized in that, The steam inlet pipe (10) and the rotary joint (1-3) are connected.

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