Steam heating system of deaerator

Abstract

The utility model belongs to the technical field of equipment heating, and relates to a steam heating system of a deaerator, which comprises a first steam pipeline, a steam inlet pipe of the deaerator, a second steam pipeline and a steam connecting pipeline, the steam connecting pipeline and the deaerator steam inlet pipe are sequentially arranged in the steam flowing direction of the first steam pipeline, the deaerator steam inlet pipe is communicated with the first steam pipeline, and the first steam pipeline is communicated with the second steam pipeline through the steam connecting pipeline. Two kinds of steam with different pressure types are mixed to serve as heating steam of the deaerator, the steam types are diversified, steam pressure fluctuation is small, and steam balance of the deaerator is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment heating and relates to a deaerator heating steam system. Background Technique

[0002] The deaerator is one of the key equipment in the boiler and heating systems. Its main function is to separate the oxygen in the water by heating, which is particularly important for the treatment of boiler feed water. The working principle of the heating deaerator is to introduce steam with stable pressure into the deaerator to heat the water to the saturation temperature under the pressure of the deaerator.

[0003] At present, the common heating steam for deaerators uses a steam source with one pressure level as the heating steam for the deaerator. For example, the Chinese patent document with the publication number CN115823564A discloses a deaerator pressure control method. Before the operation of the deaerator, high-pressure steam is introduced into the interior of the steam storage tank. This steam supply method supplies high-pressure steam to the deaerator through a high-pressure steam pipe network for thermal deaeration. Although this steam supply method can meet the deaeration requirements, it has the following disadvantages: (1) The steam used for heating is single. When the steam is lacking, it is easy to cause unqualified deaeration or deaerator fluctuation accidents; (2) Using high-pressure steam supply results in a large consumption of high-pressure steam, which is not conducive to the balance of steam with different pressure levels in chemical production and leads to low economic benefits. Content of the Utility Model

[0004] Aiming at the technical problems of the existing deaerator heating, such as single steam gas source, large steam pressure fluctuation, and unfavorable steam balance, the utility model provides a deaerator heating steam system.

[0005] The utility model mixes two different pressure types of steam as the heating steam for the deaerator by setting a first steam pipeline, a deaerator steam inlet pipe, a second steam pipeline, and a steam connection pipeline. The steam types are diversified and the steam pressure fluctuation is small, ensuring the steam balance of the deaerator.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A deaerator heating steam system includes a first steam pipeline, a deaerator steam inlet pipe, a second steam pipeline, and a steam connection pipeline. The first steam pipeline and the second steam pipeline are arranged in parallel. The steam connection pipeline and the deaerator steam inlet pipe are sequentially arranged from front to back along the steam flow direction of the first steam pipeline. The deaerator steam inlet pipe is communicated with the first steam pipeline, and the first steam pipeline is communicated with the second steam pipeline through the steam connection pipeline.

[0008] Further limited, the deaerator steam inlet pipe is one or more, and multiple deaerator steam inlet pipes are all communicated with the first steam pipeline.

[0009] Further defined, a first control valve, a second control valve and a third control valve are sequentially arranged on the first steam pipeline along the steam flow direction; the steam connection pipeline is communicated with the first steam pipeline between the first control valve and the second control valve; the deaerator steam inlet pipe is communicated with the first steam pipeline between the second control valve and the third control valve.

[0010] Further defined, a flow transmitter is also arranged on the first steam pipeline, and the flow transmitter is located between the second control valve and the third control valve.

[0011] Further defined, a pressure gauge is also arranged on the first steam pipeline, and the pressure gauge is located between the flow transmitter and the third control valve.

[0012] Further defined, a fifth control valve and a sixth control valve are arranged on the steam connection pipeline; the second steam pipeline is sequentially communicated with the first steam pipeline through the fifth control valve and the sixth control valve.

[0013] Further defined, a check valve is also arranged on the steam connection pipeline, and the check valve is located between the sixth control valve and the first steam pipeline.

[0014] Further defined, a vent valve is also arranged on the steam connection pipeline; the vent valve is located between the fifth control valve and the sixth control valve.

[0015] Further defined, a temperature sensor and a fourth control valve are sequentially arranged on the second steam pipeline along the steam flow direction; the connection end of the steam connection pipeline is located between the temperature sensor and the fourth control valve.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. By arranging the first steam pipeline, the deaerator steam inlet pipe, the second steam pipeline and the steam connection pipeline, high-pressure saturated steam is introduced into the first steam pipeline, and low-pressure saturated steam is introduced into the second steam pipeline. The two types of steam with different pressures are mixed as the heating steam of the deaerator. The steam type is diversified and the steam pressure fluctuation is small, ensuring the steam balance of the deaerator.

[0018] 2. In the utility model, the deaerator steam inlet pipe is one or more, and multiple deaerator steam inlet pipes are all communicated with the first steam pipeline. During implementation, the number of deaerator steam inlet pipes is arranged according to the number of deaerators. Multiple deaerator steam inlet pipes are connected in parallel to the first steam pipeline, and can heat multiple deaerators simultaneously, with high heating efficiency.

[0019] 3. In the present utility model, a flow transmitter, a pressure gauge, and multiple control valves are provided on the first steam pipeline. The flow and pressure of the saturated steam after mixing are measured by the flow transmitter and the pressure gauge, and the steam in the first steam pipeline is switched through the multiple control valves to ensure stable and balanced pressure, thereby improving the problem of large pressure fluctuations.

[0020] 4. In the present utility model, a fifth control valve, a sixth control valve, and a check valve are sequentially arranged on the steam connection pipeline. The fifth control valve and the sixth control valve merge the low-pressure saturated steam in the second steam pipeline into the first steam pipeline, and the check valve prevents the steam from flowing back into the second steam pipeline, facilitating the switching and control of the steam.

[0021] 5. In the present utility model, a vent valve is further arranged on the steam connection pipeline between the fifth control valve and the sixth control valve; when the steam pressure in the system is relatively high, the steam in the entire steam system is released outward through the vent valve to ensure stable and balanced system pressure, thereby enabling the deaerator to operate normally. Description of the Drawings

[0022] Figure 1 is the deaerator heating steam system provided by the present utility model;

[0023] 1 - First steam pipeline; 2 - First control valve; 3 - Second control valve; 4 - Third control valve; 5 - Flow transmitter; 6 - Pressure gauge; 7 - Deaerator steam inlet pipe; 8 - Second steam pipeline; 9 - Fourth control valve; 10 - Temperature sensor; 11 - Fifth control valve; 12 - Vent valve; 13 - Sixth control valve; 14 - Check valve; 15 - Steam connection pipeline. Detailed Embodiment

[0024] In order to make the objectives, technical solutions, and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and do not limit the protection scope of the present utility model.

[0025] Embodiment 1

[0026] See Figure 1 , a deaerator heating steam system provided in this embodiment includes a first steam pipeline 1, a deaerator steam inlet pipe 7, a second steam pipeline 8, and a steam connection pipeline 15. The first steam pipeline 1 and the second steam pipeline 8 are arranged in parallel. The steam connection pipeline 15 and the deaerator steam inlet pipe 7 are sequentially arranged along the steam flow direction of the first steam pipeline 1. The deaerator steam inlet pipe 7 is communicated with the first steam pipeline 1, and the first steam pipeline 1 is communicated with the second steam pipeline 8 through the steam connection pipeline 15.

[0027] In this embodiment, high-pressure saturated steam is introduced into the first steam pipeline 1. Preferably, 2.0 MPa saturated steam is introduced into the first steam pipeline 1; low-pressure saturated steam is introduced into the second steam pipeline 8. Preferably, 1.0 MPa saturated steam is introduced into the second steam pipeline 8.

[0028] In this embodiment, the low-pressure saturated steam in the second steam pipeline 8 is merged into the first steam pipeline 1 through the steam connection pipeline 15. The low-pressure saturated steam and the high-pressure saturated steam are mixed to form mixed saturated steam. One way of the mixed saturated steam is sent out of the steam system, and the other way is connected to the deaerator steam inlet pipe 7. Through the deaerator steam inlet pipe 7, it enters the deaerator to heat the deaerator. During implementation, the two saturated steams with different pressures are mixed to heat the deaerator, avoiding the problem of large pressure fluctuations in a single steam.

[0029] In this embodiment, the deaerator steam inlet pipe 7 is one or more, and multiple deaerator steam inlet pipes 7 are all connected to the first steam pipeline 1.

[0030] During implementation, the number of deaerator steam inlet pipes 7 is equal to the number of deaerators. When there are multiple deaerators, one deaerator steam inlet pipe 7 is connected to each deaerator, and multiple deaerator steam inlet pipes 7 are connected in parallel to the first steam pipeline 1, using the mixed saturated steam to heat multiple deaerators simultaneously with high heating efficiency.

[0031] Embodiment 2

[0032] See Figure 1 , on the basis of Embodiment 1, for the deaerator heating steam system provided in this embodiment, a first control valve 2, a second control valve 3, and a third control valve 4 are sequentially arranged on the first steam pipeline 1 along the steam flow direction; the steam connection pipeline 15 is connected to the first steam pipeline 1 between the first control valve 2 and the second control valve 3; the deaerator steam inlet pipe 7 is connected to the first steam pipeline 1 between the second control valve 3 and the third control valve 4. A flow transmitter 5 is also arranged on the first steam pipeline 1, and the flow transmitter 5 is located between the second control valve 3 and the third control valve 4.

[0033] During implementation, the flow rate of the high-pressure saturated steam in the first steam pipeline 1 is controlled by the first control valve 2, the flow rate of the mixed saturated steam is controlled by the second control valve 3, and the third control valve 4 is used to control whether the mixed saturated steam is merged into the deaerator steam inlet pipe 7 or sent out of the steam system boundary for other equipment that requires steam. The flow transmitter 5 is used to measure the steam flow rate in the first steam pipeline, facilitating the adjustment and control of the steam flow rate in the first steam pipeline according to the measurement results.

[0034] In this embodiment, a pressure gauge 6 is further provided on the first steam pipeline 1. The pressure gauge 6 is located between the flow transmitter 5 and the third control valve 4. The pressure of the mixed saturated steam formed by the mixing of the first steam pipeline 1 and the second steam pipeline 8 is measured by the pressure gauge 6 to ensure the steam pressure balance.

[0035] Embodiment 3

[0036] Refer to Figure 1 , based on Embodiment 1 or Embodiment 2, for the deaerator heating steam system provided in this embodiment, a fifth control valve 11 and a sixth control valve 13 are provided on the steam connection pipeline 15; the second steam pipeline 8 is sequentially connected to the first steam pipeline 1 through the fifth control valve 11 and the sixth control valve 13. A check valve 14 is further provided on the steam connection pipeline 15, and the check valve 14 is located between the sixth control valve 13 and the first steam pipeline 1.

[0037] During implementation, the check valve 14 can only ensure that the low-pressure saturated steam in the second steam pipeline 8 flows into the first steam pipeline 1. Through the fifth control valve 11, the sixth control valve 13 and the check valve 14, the low-pressure saturated steam is introduced into the first steam pipeline 1, and the low-pressure saturated steam is mixed with the high-pressure saturated steam.

[0038] In this embodiment, a vent valve 12 is further provided on the steam connection pipeline 15; the vent valve 12 is located between the fifth control valve 11 and the sixth control valve 13. When the steam pressure in the system is relatively high, a part of the steam in the entire steam system is released outward through the vent valve 12 to ensure the balance and stability of the system pressure, so that the deaerator operates normally.

[0039] In this embodiment, a temperature sensor 10 and a fourth control valve 9 are sequentially provided on the second steam pipeline 8 along the steam flow direction; one end of the steam connection pipeline 15 is located between the temperature sensor 10 and the fourth control valve 9; the other end of the steam connection pipeline 15 is located between the first control valve 2 and the second control valve 3. The temperature sensor 10 is used to monitor the temperature of the low-pressure saturated steam in the second steam pipeline 8, and the fourth control valve 9 controls the low-pressure saturated steam in the second steam pipeline 8 to flow into the first steam pipeline 1 through the steam connection pipeline 15 or be discharged to the outside of the steam system.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and all of them will fall within the protection scope of the present invention.

Claims

1. A deaerator heating steam system, characterized in that: The invention comprises a first steam pipeline (1), a deaerator steam inlet pipe (7), a second steam pipeline (8) and a steam connecting pipe (15), wherein the first steam pipeline (1) and the second steam pipeline (8) are arranged in parallel, the steam connecting pipe (15) and the deaerator steam inlet pipe (7) are arranged in sequence from front to back along the steam flow direction of the first steam pipeline (1), the deaerator steam inlet pipe (7) is connected to the first steam pipeline (1), and the first steam pipeline (1) is connected to the second steam pipeline (8) via the steam connecting pipe (15).

2. The deaerator heating steam system according to claim 1, characterized in that: There are one or more deaerator steam inlet pipes (7), and the multiple deaerator steam inlet pipes (7) are all connected to the first steam pipeline (1).

3. The deaerator heating steam system according to claim 2, characterized in that: A first control valve (2), a second control valve (3) and a third control valve (4) are arranged in sequence on the first steam pipeline (1) along the steam flow direction; the steam connecting pipeline (15) is connected to the first steam pipeline (1) between the first control valve (2) and the second control valve (3); and the deaerator steam inlet pipe (7) is connected to the first steam pipeline (1) between the second control valve (3) and the third control valve (4).

4. The deaerator heating steam system according to claim 3, characterized in that: A flow transmitter (5) is also provided on the first steam pipeline (1), and the flow transmitter (5) is located between the second control valve (3) and the third control valve (4).

5. The deaerator heating steam system according to claim 4, characterized in that: A pressure gauge (6) is also provided on the first steam pipeline (1), and the pressure gauge (6) is located between the flow transmitter (5) and the third control valve (4).

6. The deaerator heating steam system according to any one of claims 1 to 5, characterized in that: A fifth control valve (11) and a sixth control valve (13) are provided on the steam connecting pipeline (15); the second steam pipeline (8) is connected to the first steam pipeline (1) via the fifth control valve (11) and the sixth control valve (13) in sequence.

7. The deaerator heating steam system according to claim 6, characterized in that: A check valve (14) is also provided on the steam connecting pipeline (15), and the check valve (14) is located between the sixth control valve (13) and the first steam pipeline (1).

8. The deaerator heating steam system according to claim 7, characterized in that: A vent valve (12) is also provided on the steam connecting pipeline (15); the vent valve (12) is located between the fifth control valve (11) and the sixth control valve (13).

9. The deaerator heating steam system according to claim 8, characterized in that: A temperature sensor (10) and a fourth control valve (9) are also arranged in sequence on the second steam pipeline (8) along the steam flow direction; and the connection end of the steam connecting pipeline (15) is located between the temperature sensor (10) and the fourth control valve (9).

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