Water bath type steam temperature reduction system

Abstract

The utility model relates to a water bath type steam temperature reduction system which comprises a steam supply pipeline, a water bath type desuperheater and a steam using pipeline. The water bath type desuperheater comprises a box body, a steam inlet pipeline, a pollution discharge overflow pipeline, a steam outlet pipeline and a water replenishing pipeline; the water supplementing pipeline is connected with the box body, and a porous spraying pipe is arranged in the box body and used for injecting cooling liquid into the box body; the water supplementing pipeline comprises a flow dividing pipe, and the flow dividing pipe is installed at the bottom of the interior of the box body; when the water bath type desuperheater operates, cooling liquid is injected into the box body through the flow dividing pipe, and when the water bath type desuperheater operates, the liquid level in the box body is higher than the flow dividing pipe. And steam input by the steam supply pipeline enters the box body through the steam inlet pipeline, is subjected to temperature reduction by the water bath type desuperheater, is output from the box body through the steam outlet pipeline, and reaches a steam using pipeline to be output. The flow dividing pipe is additionally arranged in the water supplementing pipeline of the water bath type desuperheater, so that supplemented condensate water is in uniform contact with steam, and heat exchange is sufficient.

Description

Technical Field

[0001] This utility model relates to the field of steam desuperheating technology for production workshops, and in particular to a water bath type steam desuperheating system. Background Technology

[0002] Superheated steam is generally generated by steam passing through a boiler superheater. When the steam consumption point is far from the boiler room, the steam will experience significant heat loss during transportation, leading to partial condensation and water carryover. To ensure steam quality at the consumption point during long-distance steam transportation, superheated steam is generally used. When superheated steam is transported to a nearby consumption point, it usually still has a very high temperature, hence the term "superheated steam." Superheated steam is defined as steam with a temperature higher than its saturation temperature; the portion exceeding the saturation temperature is called superheat.

[0003] When using superheated steam, efficiency can actually decrease in certain heat transfer processes, making precise control difficult. Therefore, superheated steam needs to be desuperheated. To improve system efficiency, stability, equipment lifespan, and safety, the temperature of the superheated steam is reduced to saturation before it reaches the steam-using equipment. This process is called desuperheating. The main function of the desuperheater in a steam desuperheating system is to reduce the temperature of the high-temperature superheated steam produced by the boiler into saturated steam for use by the process equipment. Currently, commonly used and technologically mature steam desuperheating technologies include heat accumulators and spray desuperheating. Heat accumulators are often used to convert all superheated steam into saturated steam, but they have a large footprint and significant heat loss. Spray desuperheating requires the introduction of cooling water for atomization, resulting in a relatively complex structure. Furthermore, it cannot precisely control the desuperheating, leading to inconsistent desuperheating effects. After desuperheating, a superheat of 3-5°C remains, reducing steam utilization efficiency. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a water bath type steam desuperheating system. This system desuperheats superheated steam by adding a section with a water bath type desuperheater to the steam supply pipeline, combined with a water replenishment system in the steam supply pipeline. Specifically, the technical solution of this utility model to achieve the above objective is as follows:

[0005] A water bath type steam desuperheating system, comprising:

[0006] Steam supply pipelines, water bath desuperheaters, and steam consumption pipelines;

[0007] The water bath desuperheater includes a housing, an inlet steam pipe, a drain overflow pipe, an outlet steam pipe, and a water supply pipe. The water supply pipe is connected to the housing and is used to inject coolant into the housing. The water supply pipe includes a distribution pipe, which is installed at the bottom of the housing. When the water bath desuperheater is running, coolant is injected into the housing through the distribution pipe, and the coolant level in the housing is higher than that of the distribution pipe during operation.

[0008] The steam inlet pipe is a multi-hole nozzle. Steam is input into the steam supply pipeline, enters the box through the steam inlet pipe, is de-cooled by the water bath desuperheater, and is then output from the box through the steam outlet pipe to the steam consumption pipeline.

[0009] Furthermore, the branch pipe is tree-shaped, including a horizontally arranged main pipe and several branch pipes connected to the main pipe; the upper surface of the branch pipes is provided with water injection holes at even intervals; the coolant enters the branch pipes through the main pipe and is injected into the tank through the water injection holes.

[0010] Furthermore, the water supply pipe also includes a spray pipe; the spray pipe is installed in the upper part of the inside of the tank; the spray pipe is located above the liquid surface inside the tank; and several spray heads are evenly spaced on the spray pipe to spray downwards.

[0011] Furthermore, a pressure gauge, a temperature gauge, and an electric regulating valve assembly are sequentially connected in series on the steam supply pipeline; the electric valve assembly includes a shut-off valve, a filter, an electric regulating valve, and a shut-off valve.

[0012] Furthermore, the steam pipeline includes a steam-water separator and a steam trap assembly; steam is output from the water bath desuperheater and reaches the steam-using location through the steam-water separator; the steam trap assembly is connected to the steam-water separator and is used to discharge the condensate separated in the steam-water separator; the steam trap assembly includes a shut-off valve, a filter, a steam trap, a check valve, and a shut-off valve connected in sequence.

[0013] Furthermore, the water source for the water supply pipeline is high-temperature condensate at 90°C, which passes sequentially through a pressure gauge, an electric regulating valve assembly, a check valve, and a ball valve before entering the spray pipe and the diversion pipe respectively; a shut-off valve is installed between the ball valve and the spray pipe and the diversion pipe respectively; the electric valve assembly includes a shut-off valve, a filter, an electric regulating valve, and a shut-off valve.

[0014] Furthermore, the electric valve assembly is also equipped with a bypass shut-off valve in parallel.

[0015] Furthermore, the sewage overflow pipe includes a sewage pipe and an overflow pipe. The overflow pipe is connected to the upper part of the box and is sequentially equipped with a shut-off valve, a filter, a drain valve, a check valve, and a shut-off valve. The sewage pipe is installed at the bottom of the box and is sequentially equipped with a shut-off valve and a ball valve. The sewage pipe and the overflow pipe eventually converge together. The drain valve in the overflow pipe has a water delivery capacity greater than the water inlet capacity of the water supply pipe.

[0016] Furthermore, the water bath desuperheater also includes a vent pipe, a safety valve, a pressure gauge, a temperature gauge, a pressure sensor, a temperature sensor, and a remote magnetic level gauge; the vent pipe is installed on the top of the housing and is equipped with a shut-off valve and a ball valve; the safety valve is installed on the top of the housing and is used to release steam from the water bath desuperheater after overpressure to prevent overpressure operation; the pressure gauge, temperature gauge, pressure sensor, and temperature sensor are installed on the top of the housing, and the upper and lower halves of the housing are each provided with two level gauge ports for installing the remote magnetic level gauge.

[0017] Superheated steam enters the bottom of the water bath desuperheater 2 through the steam supply pipe 1, and then enters the housing 21 through a multi-hole spray pipe. There, it exchanges heat with the coolant inside the housing 21, achieving a cooling effect. The resulting saturated steam is output through the top steam outlet pipe 23. The output saturated steam passes through the steam-water separator 31 and then enters the steam consumption point. The condensate separated by the steam-water separator 31 is discharged through the steam trap group 32. The water source for the makeup water pipe 5 is condensate, which enters the housing 21 through the branch pipe 51 and the spray pipe 52. The coolant in the branch pipe 51 is evenly injected through the water injection hole 5121 on the branch pipe 512, ensuring thorough heat exchange with the steam. The coolant in the spray pipe 52 is sprayed downwards through the spray head, again exchanging heat with the steam that has separated from the coolant and is ready to enter the steam consumption pipe.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (i) By adding a diversion pipe to the water supply pipe of the water bath desuperheater, the condensate water and steam can be in uniform contact and exchange heat more fully with the steam.

[0020] (ii) Add a spray pipe to the water supply pipe of the water bath desuperheater so that the cooled steam can come into further contact with the coolant spray, further ensuring that the steam temperature is reduced.

[0021] (III) The biggest feature of the water bath desuperheater is its large adjustment ratio, which can effectively desuperheat superheated steam throughout its entire stroke range and output saturated steam. When the load fluctuates greatly, the housing can also play a partial balancing role, so the whole system is very simple and reliable. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the system connection described in this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the water bath desuperheater described in this utility model;

[0024] In the picture:

[0025] 1—Steam supply pipeline;

[0026] 2—Water bath desuperheater, 21—Box, 22—Steam inlet pipe, 23—Steam outlet pipe, 24—Vent pipe, 25—Sewage pipe, 26—Overflow pipe, 27—Remote magnetic level gauge, 28—Safety valve;

[0027] 3—Steam pipeline; 31—Steam-water separator; 32—Drain valve assembly;

[0028] 4—Electric regulating valve assembly;

[0029] 5—Water supply pipe, 51—Diversion pipe, 511—Main pipe, 512—Branch pipe, 5121—Water injection hole, 52—Spray pipe. Detailed Implementation

[0030] like Figure 1-2 As shown, the embodiments of this utility model are as follows:

[0031] A water bath type steam desuperheating system, comprising:

[0032] Steam supply pipeline 1, water bath desuperheater 2, and steam consumption pipeline 3;

[0033] The water bath desuperheater 2 includes a housing 21, an inlet steam pipe 22, a drain overflow pipe 26, an outlet steam pipe 23, and a water supply pipe 5. The water supply pipe 5 is connected to the housing 21 and is used to inject coolant into the housing 21. The water supply pipe 5 includes a branch pipe 51 and a spray pipe 52. The branch pipe 51 is installed at the bottom inside the housing 21. When the water bath desuperheater 2 is running, coolant is injected into the housing 21 through the branch pipe 51. During operation, the liquid level in the housing 21 is higher than that in the branch pipe 51. The branch pipe 51 is tree-branch shaped and includes a horizontally arranged main pipe 511 and several branch pipes 512 connected to the main pipe 511. Water injection holes 5121 are evenly spaced on the upper surface of the branch pipes 512. The coolant enters the branch pipes 512 through the main pipe 511 and then enters the housing 21 through the water injection holes 5121. The spray pipe 52 is installed in the upper part of the tank 21; the spray pipe 52 is located above the liquid surface inside the tank 21; several spray heads are evenly spaced on the spray pipe 52, spraying downwards. The water source for the water supply pipe 5 is high-temperature condensate at 90℃, which passes through a pressure gauge, an electric regulating valve group 4, a check valve, and a ball valve in sequence before entering the spray pipe 52 and the diversion pipe 51 respectively; a shut-off valve is installed between the ball valve and the spray pipe 52 and the diversion pipe 51 respectively; the electric valve group includes a shut-off valve, a filter, an electric regulating valve, and a shut-off valve. A bypass shut-off valve is also installed in parallel with the electric valve group.

[0034] The steam inlet pipe 22 is a multi-hole nozzle. Steam input from the steam supply pipe 1 enters the housing 21 through the steam inlet pipe 22, is de-cooled by the water bath desuperheater 2, and then exits from the housing 21 through the steam outlet pipe 23 to the steam consumption pipe 3. A pressure gauge, a temperature gauge, and an electric regulating valve assembly 4 are connected in series on the steam supply pipe 1. The electric valve assembly includes a shut-off valve, a filter, an electric regulating valve, and a shut-off valve. A bypass shut-off valve is also connected in parallel to the electric valve assembly.

[0035] Steam pipeline 3 includes a steam-water separator 31 and a steam trap assembly 32. Steam is output from the water bath desuperheater 2 and reaches the steam-using location through the steam-water separator 31. The steam trap assembly 32 is connected to the steam-water separator 31 and is used to discharge the condensate separated in the steam-water separator 31. The steam trap assembly 32 includes a shut-off valve, a filter, a steam trap, a check valve, and a shut-off valve connected in sequence. Sewage overflow pipeline 26 includes a sewage pipeline 25 and an overflow pipeline 26. The overflow pipeline 26 is connected to the upper part of the housing 21 and is equipped with a shut-off valve, a filter, a steam trap, a check valve, and a shut-off valve in sequence. The sewage pipeline 25 is installed at the bottom of the housing 21 and is equipped with a shut-off valve and a ball valve in sequence. The sewage pipeline 25 and the overflow pipeline 26 eventually converge. The steam trap in the overflow pipeline 26 has a water delivery capacity greater than the water inlet capacity of the water supply pipeline 5.

[0036] The water bath desuperheater 2 also includes a vent pipe 24, a safety valve 28, a pressure gauge, a temperature gauge, a pressure sensor, a temperature sensor, and a remote magnetic level gauge 27. The vent pipe 24 is installed on the top of the housing 21 and is equipped with a shut-off valve and a ball valve. The safety valve 28 is installed on the top of the housing 21 and is used to release steam from the water bath desuperheater 2 after overpressure to prevent overpressure operation. The pressure gauge, temperature gauge, pressure sensor, and temperature sensor are installed on the top of the housing 21. The upper and lower halves of the housing 21 are each equipped with two level gauge ports for installing the remote magnetic level gauge 27.

[0037] Superheated steam enters the bottom of the water bath desuperheater 2 through the steam supply pipe 1, and then enters the housing 21 through a multi-hole spray pipe. There, it exchanges heat with the coolant inside the housing 21, achieving a cooling effect. The resulting saturated steam is output through the top steam outlet pipe 23. The output saturated steam passes through the steam-water separator 31 and then enters the steam consumption point. The condensate separated by the steam-water separator 31 is discharged through the steam trap group 32. The water source for the makeup water pipe 5 is condensate, which enters the housing 21 through the branch pipe 51 and the spray pipe 52. The coolant in the branch pipe 51 is evenly injected through the water injection hole 5121 on the branch pipe 512, ensuring thorough heat exchange with the steam. The coolant in the spray pipe 52 is sprayed downwards through the spray head, again exchanging heat with the steam that has separated from the coolant and is ready to enter the steam consumption pipe.

[0038] The control system uses a PLC for automatic control. The PLC is connected to an electric regulating valve, a magnetic level gauge, a pressure sensor, and a temperature sensor. By setting high and low liquid levels for the desuperheater, the water supply system automatically replenishes water when the desuperheater is at a low level and stops replenishing water when the level is high. The pressure and temperature signals of the desuperheater are transmitted to the PLC in real time, allowing operators to monitor the temperature and pressure changes inside the desuperheater. By feeding back the pressure signal from the desuperheater to the PLC, the PLC controls the opening of the superheated steam electric regulating valve to maintain a constant pressure inside the pressure reducer.

[0039] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A water bath type steam desuperheating system, characterized in that, include: Steam supply pipeline (1), water bath desuperheater (2) and steam consumption pipeline (3); The water bath desuperheater (2) includes a housing (21), an inlet steam pipe (22), a drain overflow pipe (26), an outlet steam pipe (23), and a water supply pipe (5); the water supply pipe (5) is connected to the housing (21) and is used to inject coolant into the housing (21); the water supply pipe (5) includes a branch pipe (51), which is installed at the bottom of the housing (21); when the water bath desuperheater (2) is running, coolant is injected into the housing (21) through the branch pipe (51), and the liquid level in the housing (21) is higher than that in the branch pipe (51) during operation; The steam inlet pipe (22) is a multi-hole nozzle. Steam is input into the steam supply pipe (1) and enters the box (21) through the steam inlet pipe (22). After being cooled by the water bath type desuperheater (2), it is output from the box (21) through the steam outlet pipe (23) and reaches the steam use pipe (3) for output.

2. The water bath type steam desuperheating system as described in claim 1, characterized in that: The branch pipe (51) is tree-branch shaped and includes a horizontally arranged main pipe (511) and several branch pipes (512) connected to the main pipe (511); the upper surface of the branch pipes (512) is evenly spaced with water injection holes (5121); the coolant is injected into the box (21) through the water injection holes (5121).

3. The water bath type steam desuperheating system as described in claim 1, characterized in that: The water supply pipe (5) also includes a spray pipe (52); the spray pipe (52) is installed in the upper part of the box (21); the spray pipe (52) is located above the liquid surface inside the box (21); a number of spray heads are evenly spaced on the spray pipe (52) and spray downwards.

4. The water bath type steam desuperheating system as described in claim 1, characterized in that: A pressure gauge, a temperature gauge, and an electric regulating valve group (4) are connected in series on the steam supply pipeline (1); the electric valve group includes a shut-off valve, a filter, an electric regulating valve, and a shut-off valve.

5. The water bath type steam desuperheating system as described in claim 1, characterized in that: The steam pipeline (3) includes a steam-water separator (31) and a steam trap assembly (32); steam is output from the water bath desuperheater (2) and reaches the steam-using location through the steam-water separator (31); the steam trap assembly (32) is connected to the steam-water separator (31) and is used to discharge the condensate separated in the steam-water separator (31); the steam trap assembly (32) includes a shut-off valve, a filter, a steam trap, a check valve and a shut-off valve connected in sequence.

6. The water bath type steam desuperheating system as described in claim 3, characterized in that: The water source of the water supply pipe (5) is high-temperature condensate at 90°C. After passing through the pressure gauge, electric regulating valve group (4), check valve, and ball valve in sequence, it enters the spray pipe (52) and the diversion pipe (51) respectively. The ball valve is provided with a shut-off valve between the spray pipe (52) and the diversion pipe (51). The electric valve group includes a shut-off valve, a filter, an electric regulating valve, and a shut-off valve.

7. A water bath type steam desuperheating system as described in claim 4 or 6, characterized in that: The electric valve assembly is also equipped with a bypass shut-off valve in parallel.

8. The water bath type steam desuperheating system as described in claim 1, characterized in that: The sewage overflow pipe (26) includes a sewage pipe (25) and an overflow pipe (26). The overflow pipe (26) is connected to the upper part of the box (21) and is equipped with a shut-off valve, a filter, a drain valve, a check valve and a shut-off valve in sequence. The sewage pipe (25) is installed at the bottom of the box (21) and is equipped with a shut-off valve and a ball valve in sequence. The sewage pipe (25) and the overflow pipe (26) eventually converge together. The drain valve in the overflow pipe (26) has a water delivery capacity greater than the water inlet of the water supply pipe (5).

9. The water bath type steam desuperheating system as described in claim 1, characterized in that: The water bath desuperheater (2) also includes a vent pipe (24), a safety valve (28), a pressure gauge, a temperature gauge, a pressure sensor, a temperature sensor, and a remote magnetic float level gauge (27); the vent pipe (24) is installed on the top of the housing (21) and is equipped with a shut-off valve and a ball valve; the safety valve (28) is installed on the top of the housing (21) and is used to vent steam from the safety valve (28) after the water bath desuperheater (2) is overpressurized to prevent overpressurized operation; the pressure gauge, temperature gauge, pressure sensor, and temperature sensor are installed on the top of the housing (21), and the upper and lower halves of the housing (21) are respectively provided with two level gauge ports for installing the remote magnetic float level gauge (27).

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