Steam supply system

Abstract

The utility model discloses a steam supply system which comprises a cold steam re-extraction branch, a hot steam re-extraction branch, a pressure matcher steam extraction branch, a steam mixing unit, a first sensor group, a second sensor group and a third sensor group, the first sensor group is arranged on the cold re-extraction branch, the second sensor group is arranged on the hot re-extraction branch, and the third sensor group is arranged on the pressure matcher extraction branch; the first sensor group comprises a first flow sensor, a first pressure sensor and a first temperature sensor; the second sensor group comprises a second flow sensor, a second pressure sensor and a second temperature sensor; the third sensor group comprises a third flow sensor, a third pressure sensor and a third temperature sensor; the cold re-extraction steam branch, the hot re-extraction steam branch and the pressure matcher extraction steam branch are respectively connected with the steam mixing unit, and the steam mixing unit is used for supplying steam to users.

Description

Technical Field

[0001] The embodiment of the utility model relates to the field of automation technology, and in particular to a steam supply system. Background Art

[0002] At present, thermal power plants face a series of challenges when making quotations under the spot trading model. First, the heating quotation needs to be comprehensively considered based on multiple factors such as market supply and demand, fuel costs, and operation and maintenance costs, and these factors are often uncertain and volatile. This requires thermal power plants to be able to quickly and accurately formulate reasonable quotation strategies during the quotation process.

[0003] The steam (heat) supply system of existing thermal power plants has the following defects: the operating personnel do not understand the spot quoted steam supply; the operating personnel do not understand the actual steam supply of the steam (heat) supply system; the operating personnel do not understand the deviation between the actual steam supply and the spot quoted steam supply; the operating personnel do not understand the remaining rescue time and the required additional steam supply;

[0004] Based on the above defects, if the operating personnel fail to monitor properly, it is easy for the actual steam supply to be less than the heating amount quoted in the spot price, resulting in huge assessment amounts. Utility Model Content

[0005] The utility model provides a steam supply system to achieve the purpose of solving at least one problem existing in the prior art.

[0006] The utility model embodiment provides a steam supply system, comprising:

[0007] A cold re-extraction steam branch, a hot re-extraction steam branch, a pressure matching device extraction steam branch, a steam mixing unit, a first sensor group, a second sensor group, and a third sensor group;

[0008] The first sensor group is arranged on the cold re-extraction branch, the second sensor group is arranged on the hot re-extraction branch, and the third sensor group is arranged on the pressure matcher extraction branch;

[0009] The first sensor group includes a first flow sensor, a first pressure sensor, and a first temperature sensor;

[0010] The second sensor group includes a second flow sensor, a second pressure sensor, and a second temperature sensor;

[0011] The third sensor group includes a third flow sensor, a third pressure sensor, and a third temperature sensor;

[0012] The cold re-extraction steam branch, the hot re-extraction steam branch, and the pressure matcher steam extraction branch are respectively connected to the steam mixing unit, and the steam mixing unit is used to supply steam to users.

[0013] Optionally, it further comprises a fourth sensor group, wherein the fourth sensor group is arranged in the steam mixing unit;

[0014] The fourth sensor group includes a fourth flow sensor, a fourth pressure sensor, and a fourth temperature sensor.

[0015] Optionally, it further includes a communication unit, wherein the communication unit is connected to the first sensor group, the second sensor group, and the third sensor group;

[0016] The communication unit is configured to transmit measurement data of the first sensor group, the second sensor group, and the third sensor group.

[0017] Optionally, it further includes a controller, wherein the controller is connected to the first sensor group, the second sensor group, and the third sensor group;

[0018] The controller is configured to determine a first branch heating amount according to measurement data of the first sensor group, determine a second branch heating amount according to measurement data of the second sensor group, and determine a third branch heating amount according to measurement data of the third sensor group.

[0019] Optionally, it further includes a display, wherein the display is connected to the controller;

[0020] The display is used to display the measurement data of the first sensor group, the measurement data of the second sensor group, and the measurement data of the third sensor group.

[0021] Optionally, an auxiliary steam header is also included, and the cold re-extraction steam branch is connected to the auxiliary steam header.

[0022] Optionally, it further includes a first pressure cylinder, a second pressure cylinder and a third pressure cylinder;

[0023] The hot re-extraction steam branch is connected to the pipeline between the second pressure cylinder and the third pressure cylinder.

[0024] Optionally, it further includes a pressure matcher, wherein the pressure matcher is connected to the first pressure cylinder and the second pressure cylinder;

[0025] The pressure matcher steam extraction branch is connected to the output pipeline of the pressure matcher.

[0026] Optionally, it also includes a first heater, a deaerator, and a second heater;

[0027] The deaerator is connected to the boiler via the first heater, and the deaerator is connected to the heating station via the second heater.

[0028] Optionally, the first flow sensor, the second flow sensor, and the third flow sensor are balanced differential pressure sensors.

[0029] Compared with the prior art, the beneficial effects of the utility model are: the utility model proposes a steam supply system, which includes a cold re-extraction branch, a hot re-extraction branch and a pressure matcher extraction branch. Based on the above three steam extraction branches, the steam supply capacity of the steam supply system can be effectively improved. At the same time, when steam supply adjustment is required, the total steam supply can be flexibly adjusted in real time according to the maximum allowable extraction volume of each branch by adjusting the steam supply volume of one or more branches, so that the total steam supply volume meets the preset steam supply demand. In addition, each steam extraction branch is equipped with a group of sensors, and the steam supply status of each steam extraction branch can be determined by the sensors, so as to facilitate automatic control of heating based on the real-time steam supply volume of each branch; based on the real-time operation data of each steam extraction branch, it is also convenient for auxiliary operating personnel to adjust the heating system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a structural block diagram of a steam supply system in an embodiment;

[0031] Figure 2 is another structural block diagram of a steam supply system in an embodiment;

[0032] Figure 3 It is another structural block diagram of a steam supply system in an embodiment. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] Figure 1 is a structural block diagram of the steam supply system in the embodiment, refer to Figure 1 , the steam supply system includes:

[0035] Cold re-extraction branch 100, hot re-extraction branch 200, pressure matching device extraction branch 300, steam mixing unit 400, first sensor group 101, second sensor group 201, third sensor group 301;

[0036] The first sensor group 101 is arranged on the cold re-extraction branch 100, the second sensor group 201 is arranged on the hot re-extraction branch 200, and the third sensor group 301 is arranged on the pressure matcher extraction branch 300;

[0037] The first sensor group 101 includes a first flow sensor, a first pressure sensor, and a first temperature sensor;

[0038] The second sensor group 201 includes a second flow sensor, a second pressure sensor, and a second temperature sensor;

[0039] The third sensor group 301 includes a third flow sensor, a third pressure sensor, and a third temperature sensor;

[0040] The cold re-extraction steam branch 100, the hot re-extraction steam branch 200, and the pressure matching device extraction steam branch 300 are respectively connected to the steam mixing unit 400, and the steam mixing unit 400 is used to supply steam to users.

[0041] In this embodiment, the cold re-extraction steam branch 100 is set to extract (low-temperature) steam from the cold section of the (thermal) generator set, and the hot re-extraction steam branch 200 is set to extract (high-temperature) steam from the hot section of the (thermal) generator set;

[0042] The pressure matcher steam extraction branch 300 is configured to extract steam from the output pipeline of the pressure matcher.

[0043] In this embodiment, the position of the cold section is not limited, and it can be determined as needed according to the structure of the actual generator set. For example, the cold section can include a reheat steam cold section pipeline, and the reheat steam cold section pipeline can be a reheat steam pipeline from the steam turbine exhaust check valve to the reheater inlet header and a branch pipeline within the primary valve;

[0044] There is no limitation on the location of the hot section, which can be determined as needed based on the actual structural composition of the generator set. For example, the hot section can include a reheat steam hot section pipeline, which can be a reheat steam pipeline from the outlet of the boiler's last-stage reheat steam outlet header to the turbine medium-pressure main steam valve and a branch pipeline within the primary valve.

[0045] In this embodiment, the pressure matcher is used to adjust the low-pressure steam to steam of specified pressure and temperature. For example, the pressure matcher can use the steam of 5.0Mpa and 450°C from the boiler as the driving steam, inject the steam of 2.5Mpa and 350°C, increase its pressure to 3.0Mpa, and output the steam of 3.0Mpa and 250°C;

[0046] In this embodiment, the structure and working principle of the pressure matcher are the same as those in the prior art, and the specific contents will not be described in detail.

[0047] In this embodiment, the first flow sensor, the first pressure sensor, and the first temperature sensor are used to measure the first steam flow, the first steam pressure, and the first steam temperature in the cold re-extraction branch 100, respectively;

[0048] The second flow sensor, the second pressure sensor, and the second temperature sensor are used to measure the second steam flow, the second steam pressure, and the second steam temperature in the hot re-extraction branch 200, respectively;

[0049] The third flow sensor, the third pressure sensor, and the third temperature sensor are used to measure the third steam flow, the third steam pressure, and the third steam temperature in the pressure matching device extraction branch 300, respectively;

[0050] In this embodiment, the first steam flow rate, the first steam pressure and the first steam temperature can be used to manually monitor the working state of the cold re-extraction branch 100, or can be used to manually calculate a physical quantity (such as heat supply) specified by the cold re-extraction branch 100;

[0051] The second steam flow rate, the second steam pressure, and the second steam temperature may be used to manually monitor the working state of the hot re-extraction branch 200, or may be used to manually calculate a physical quantity (such as a heat supply) specified by the hot re-extraction branch 200;

[0052] The third steam flow rate, the third steam pressure and the third steam temperature can be used to manually monitor the working state of the pressure matcher extraction branch 300, or can be used to manually calculate a physical quantity (such as heating amount) specified by the pressure matcher extraction branch 300.

[0053] In this embodiment, the steam mixing unit 400 is used to mix the steam outputted through the cold re-extraction branch 100, the hot re-extraction branch 200, and the pressure matcher extraction branch 300, and output the mixed steam to a designated steam-consuming unit.

[0054] The present embodiment proposes a steam supply system, which includes a cold re-extraction branch, a hot re-extraction branch and a pressure matcher extraction branch. Based on the above three steam extraction branches, the steam supply capacity of the steam supply system can be effectively improved. At the same time, when steam supply adjustment is required, the total steam supply can be flexibly adjusted in real time according to the maximum allowable extraction volume of each branch by adjusting the steam supply volume of one or more branches, so that the total steam supply volume meets the preset steam supply demand. In addition, each steam extraction branch is configured with a group of sensors, and the steam supply status of each steam extraction branch can be determined by the sensors, so as to facilitate automatic control of heating based on the real-time steam supply volume of each branch; based on the real-time operation status data of each steam extraction branch, it is also convenient for auxiliary operation personnel to adjust the heating system.

[0055] Figure 2 is another structural block diagram of the steam supply system in the embodiment, refer to Figure 2 ,exist Figure 1 Based on the scheme shown, in one possible implementation scheme, the steam supply system further includes a fourth sensor group 401, and the fourth sensor group is arranged in the steam mixing unit 400;

[0056] The fourth sensor group 401 includes a fourth flow sensor, a fourth pressure sensor, and a fourth temperature sensor.

[0057] In this solution, the fourth flow sensor, the fourth pressure sensor, and the fourth temperature sensor are used for the fourth steam flow, the fourth steam pressure, and the fourth steam temperature (output) of the steam mixing unit 400, respectively;

[0058] The fourth steam flow rate, the fourth steam pressure and the fourth steam temperature may be used to manually monitor the working state of the steam mixing unit 400 , or may be used to manually calculate a physical quantity (such as a heat supply) specified by the steam mixing unit 400 .

[0059] refer to Figure 2 , based on any of the above solutions, in one possible implementation scheme, the steam supply system further includes a communication unit 500, and the communication unit 500 is connected to the first sensor group 101, the second sensor group 201, and the third sensor group 301;

[0060] The communication unit 500 is configured to transmit the measurement data of the first sensor group 101 , the second sensor group 201 , and the third sensor group 301 .

[0061] In this solution, the communication unit 500 may be configured to communicate with a designated server, and the server may be a cloud platform of a power grid, or the like.

[0062] In this solution, after receiving the above measurement data, the power grid can determine the working status of the steam supply system or the generator set including the steam supply system according to the measurement data, and then complete the specified data storage or data analysis.

[0063] refer to Figure 2 , based on any of the above solutions, in one possible implementation scheme, the steam supply system further includes a controller 600, and the controller 600 is connected to the first sensor group 101, the second sensor group 201, and the third sensor group 301;

[0064] The controller 600 is configured to determine the first branch heating amount according to the measurement data of the first sensor group 101 , determine the second branch heating amount according to the measurement data of the second sensor group 201 , and determine the third branch heating amount according to the measurement data of the third sensor group 301 .

[0065] In this embodiment, the method for determining the heating amount of each branch is set to be the same, and the method for determining the heating amount of each branch is not limited, which is the same as the prior art;

[0066] Taking the determination of the heat supply of the first branch as an example, the heat supply of the first branch can be determined in the following manner:

[0067] Obtain a first steam flow rate, determine a first heating supply by looking up a pre-stored steam flow rate-heating supply comparison table, obtain a first steam pressure and a first steam temperature, and correct the first heating supply based on the first steam pressure and the first steam temperature according to a pre-stored heating supply correction curve (or table) to obtain a first branch heating supply.

[0068] For example, in this solution, according to actual needs, the first branch heat supply, the second branch heat supply and the third branch heat supply can be used for the following contents:

[0069] Through the heat supply of the first branch, the heat supply of the second branch and the heat supply of the third branch, the cumulative heat supply per hour of each branch can be calculated, and the cumulative heat supply of the steam supply system can be calculated and compared with the heat supply of the spot quotation in real time;

[0070] By comparing the real-time (cumulative) heat supply with the heat supply of the spot quotation, it can be found in advance whether it is lower than the limit of the spot quotation;

[0071] If it is lower than the quoted limit, (the controller) can immediately sound an alarm and allow operators to intervene in advance (such as adjusting the heating amount) to avoid assessments.

[0072] In this solution, the controller can be configured to determine in real time whether the current situation will be assessed, and calculate in real time the safety adjustment margin between the current heat supply and the spot price;

[0073] Once it falls below the limit, the difference between the cumulative heating supply per hour and the spot quoted heating supply can be calculated, and the minimum heating flow rate can be calculated by dividing the difference by the remaining time. The time, difference and minimum heating flow rate are displayed in real time to remind the operating personnel.

[0074] In this scheme, spot quotation is used to refer to the estimated heat supply reported to the (grid), and assessment is used to refer to the situation where the actual heat supply is less than the estimated heat supply.

[0075] In this solution, the benefits of comparing the real-time (cumulative) heating supply with the spot price heating supply include:

[0076] Based on the real-time (cumulative) heating supply and spot price heating supply data, the steam supply system can be automatically controlled to supply heat, and whether it exceeds the limit and whether it will be assessed can be analyzed more quickly, scientifically and orderly;

[0077] It can express the real-time status data of whether the limit is exceeded and operation, and assist the operation personnel in adjusting the heating system.

[0078] refer to Figure 2, based on the solution that the steam supply system includes a controller, in one possible implementation scheme, the steam supply system further includes a display 700, and the display 700 is connected to the controller 600;

[0079] The display 700 is used to display the measurement data of the first sensor group 101 , the measurement data of the second sensor group 201 , and the measurement data of the third sensor group 301 .

[0080] Figure 3 This is another structural block diagram of a steam supply system in the embodiment, refer to Figure 3 On the basis of any of the above schemes, in one possible implementation scheme, the steam supply system further includes an auxiliary steam header 3, and the cold re-extraction steam branch 100 is connected to the auxiliary steam header 3.

[0081] In this solution, the structure and function of the auxiliary steam header 3 are the same as those in the prior art, and the specific contents will not be described in detail. The auxiliary steam header 3 is used to provide steam with a certain pressure and temperature.

[0082] refer to Figure 3 , based on any of the above schemes, in one possible implementation scheme, the steam supply system further includes a first pressure cylinder 21, a second pressure cylinder 22 and a third pressure cylinder 23;

[0083] The hot re-extraction steam branch 200 is connected to the pipeline between the second pressure cylinder 22 and the third pressure cylinder 23 .

[0084] In this solution, the first pressure cylinder 21, the second pressure cylinder 22, and the third pressure cylinder 23 are respectively a high pressure cylinder, a medium pressure cylinder, and a low pressure cylinder, wherein the pressure ranges of high pressure, medium pressure, and low pressure are the same as the general pressure level definitions in thermal power generating sets.

[0085] In this solution, the structures and functions of the first pressure cylinder 21, the second pressure cylinder 22, and the third pressure cylinder 23 are the same as those in the prior art, and the specific contents will not be described in detail. The pressure cylinders are used to cooperate with the steam turbine to do work.

[0086] refer to Figure 3 In one possible implementation, the steam supply system further includes a pressure matcher 6, and the pressure matcher 6 is connected to the first pressure cylinder 21 and the second pressure cylinder 22;

[0087] The pressure matching device extraction steam branch 300 is connected to the output pipeline of the pressure matching device 6 .

[0088] In this scheme, a pressure matcher 6 is configured to achieve mixing of high-pressure and low-temperature steam source and high-temperature and low-pressure steam source. If necessary, the outlet water of the pre-pump is used as cooling water. The designed steam supply pressure is 1.6MPa, the steam supply temperature is 350℃, and the maximum steam supply capacity is 75t / h~80t / h.

[0089] refer to Figure 3, based on any of the above schemes, in one possible implementation scheme, the steam supply system further includes a first heater 42, a deaerator 41, and a second heater 43;

[0090] The deaerator 41 is connected to the boiler 1 via the first heater 42 , the deaerator 41 is connected to the heating station (the primary heating station 52 ) via the second heater 43 , and the deaerator 41 is also connected to the auxiliary heating station 51 .

[0091] In this solution, the first heater 42 is set as a high-pressure heater, and the second heater 43 is set as a low-pressure heater. The structures and functions of the high-pressure heater, the low-pressure heater, and the deaerator 41 are the same as those in the prior art, and the specific contents are not described in detail.

[0092] In this solution, the heating auxiliary station 51 is set to supply heat to a designated user, and the heating primary station 52 is set to supply heat to the heating network, wherein the heating auxiliary station 51 and the heating primary station 52 have different heating parameters;

[0093] For example, the heating parameters of the heating first station 51 may be: heating capacity is 126MW, design pressure is 0.6-1.0MPa, design temperature is not less than 160°C; design return water temperature is 65°C, and design circulating water volume is 1806t / h;

[0094] The heating parameters of the heating first station 52 can be: heating network water supply pressure 1.60-1.65MPa, return water pressure 0.3-0.35Mpa, heating network design water supply flow rate of about 12040t / h, design drain temperature of 80°C.

[0095] Based on any of the foregoing solutions, in one possible implementation, the first flow sensor, the second flow sensor, and the third flow sensor are balanced differential pressure sensors.

[0096] refer to Figure 3 In one possible implementation scheme, the steam supply system includes a boiler 1, a first pressure cylinder 21, a second pressure cylinder 22, a third pressure cylinder 23, an auxiliary steam header 3, a deaerator 41, a first heater 42, a second heater 43, a heating auxiliary station 51, a heating primary station 52, and a pressure matcher 6;

[0097] It also includes a cold re-extraction branch 100, a hot re-extraction branch 200, a pressure matching device extraction branch 300, a steam mixing unit 400, a first sensor group 101, a second sensor group 201, and a third sensor group 301;

[0098] Wherein, the first sensor group 101 includes a first flow sensor, a first pressure sensor, and a first temperature sensor;

[0099] The second sensor group 201 includes a second flow sensor, a second pressure sensor, and a second temperature sensor;

[0100] The third sensor group 301 includes a third flow sensor, a third pressure sensor, and a third temperature sensor;

[0101] The cold re-extraction steam branch 100, the hot re-extraction steam branch 200, and the pressure matching device extraction steam branch 300 are respectively connected to the steam mixing unit 400, and the steam mixing unit 400 is used to supply steam to users;

[0102] The cold re-extraction steam branch 100 is connected to the auxiliary steam header 3, the hot re-extraction steam branch 200 is connected to the pipeline between the second pressure cylinder 22 and the third pressure cylinder 23, and the pressure matching device extraction steam branch 300 is connected to the output pipeline of the pressure matching device 6;

[0103] In this solution, the steam supply system also includes a controller, a fourth sensor group and a display;

[0104] The fourth sensor group includes a fourth flow sensor, a fourth pressure sensor, and a fourth temperature sensor;

[0105] The controller is connected to the first sensor group 101 , the second sensor group 201 , the third sensor group 301 , and the fourth sensor group, and is also connected to the display.

[0106] In this solution, the controller is configured as follows:

[0107] Calculate the heat supply of the first branch, the heat supply of the second branch and the heat supply of the third branch;

[0108] Through the heat supply of the first branch, the heat supply of the second branch and the heat supply of the third branch, the cumulative heat supply per hour of each branch can be calculated, and the cumulative heat supply of the steam supply system can be calculated and compared with the heat supply of the spot quotation in real time;

[0109] By comparing the real-time (cumulative) heat supply with the heat supply of the spot quotation, it can be found in advance whether it is lower than the limit of the spot quotation;

[0110] If it is lower than the quoted limit, (the controller) can immediately sound an alarm and allow operators to intervene in advance (such as adjusting the heating amount) to avoid assessments.

[0111] In this solution, the controller can be configured to determine in real time whether the current situation will be assessed, and calculate in real time the safety adjustment margin between the current heat supply and the spot price;

[0112] Once the limit is exceeded, the difference between the accumulated heating supply per hour and the heating supply at the spot price can be calculated, and the minimum heating flow rate can be calculated by dividing the difference by the remaining time. The time, difference and minimum heating flow rate can be displayed in real time to remind the operator.

[0113] In this solution, the controller is also configured to upload the first branch heat supply, the second branch heat supply and the third branch heat supply, as well as the measurement data of the first sensor group 101, the second sensor group 201 and the third sensor group 301 to the service end of the power grid;

[0114] In this solution, the display is used to display the measurement data of the first sensor group 101, the second sensor group 201, the third sensor group 301, and the fourth sensor group.

[0115] In this solution, the controller uploads the first branch heat supply, the second branch heat supply and the third branch heat supply respectively, and uploads the measurement data of the first sensor group 101, the second sensor group 201 and the third sensor group 301 respectively for the purpose of:

[0116] Different combinations of the first branch heat supply, the second branch heat supply and the third branch heat supply correspond to different steam supply capacities of the steam supply system. Through the specific values ​​of the heat supply of each branch, the steam supply upper limit of the steam supply system can be known and accurately judged, which makes it easier for the power grid to determine whether (the steam supply system) will be subject to assessment at present.

[0117] In this scheme, Figure 3 The steam supply system shown can be set as a steam supply unit, and at the steam supply end, it can include multiple steam supply units with the same structure, and multiple steam supply units are configured to simultaneously supply electricity, heat and steam;

[0118] Among them, each time the spot quotation is made, you can declare the hourly heat supply of one or more steam supply units for the next day (spot quotation). When judging whether it exceeds the limit of the spot quotation, only the steam supply unit that made the declaration will be judged;

[0119] In this scheme, based on the steam supply system, it can avoid the operating personnel not only need to monitor the flow of the industrial steam supply main pipe, but also need to monitor the flow of the unit unit branch steam supply system. If the monitoring is not in place, it is easy to cause the actual steam supply to be less than the heating amount quoted in the spot price, resulting in a huge assessment amount.

[0120] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A steam supply system, characterized in that: include: A cold re-extraction steam branch, a hot re-extraction steam branch, a pressure matching device extraction steam branch, a steam mixing unit, a first sensor group, a second sensor group, and a third sensor group; The first sensor group is arranged on the cold re-extraction branch, the second sensor group is arranged on the hot re-extraction branch, and the third sensor group is arranged on the pressure matcher extraction branch; The first sensor group includes a first flow sensor, a first pressure sensor, and a first temperature sensor; The second sensor group includes a second flow sensor, a second pressure sensor, and a second temperature sensor; The third sensor group includes a third flow sensor, a third pressure sensor, and a third temperature sensor; The cold re-extraction steam branch, the hot re-extraction steam branch, and the pressure matcher steam extraction branch are respectively connected to the steam mixing unit, and the steam mixing unit is used to supply steam to users.

2. The steam supply system according to claim 1, characterized in that: It also includes a fourth sensor group, wherein the fourth sensor group is arranged in the steam mixing unit; The fourth sensor group includes a fourth flow sensor, a fourth pressure sensor, and a fourth temperature sensor.

3. The steam supply system according to claim 1, characterized in that: Also includes a communication unit, the communication unit is connected to the first sensor group, the second sensor group, and the third sensor group; The communication unit is configured to transmit measurement data of the first sensor group, the second sensor group, and the third sensor group.

4. The steam supply system according to claim 1, characterized in that: Also includes a controller, the controller is connected to the first sensor group, the second sensor group, and the third sensor group; The controller is configured to determine the first branch heating amount according to the measurement data of the first sensor group, determine the second branch heating amount according to the measurement data of the second sensor group, and determine the third branch heating amount according to the measurement data of the third sensor group.

5. The steam supply system according to claim 4, characterized in that: Also includes a display, the display is connected to the controller; The display is used to display the measurement data of the first sensor group, the measurement data of the second sensor group, and the measurement data of the third sensor group.

6. The steam supply system according to claim 1, characterized in that: It also includes an auxiliary steam header, and the cold re-extraction steam branch is connected to the auxiliary steam header.

7. The steam supply system according to claim 1, characterized in that: Also includes a first pressure cylinder, a second pressure cylinder and a third pressure cylinder; The hot re-extraction steam branch is connected to the pipeline between the second pressure cylinder and the third pressure cylinder.

8. The steam supply system according to claim 7, characterized in that: It also includes a pressure matcher, which is connected to the first pressure cylinder and the second pressure cylinder; The pressure matcher steam extraction branch is connected to the output pipeline of the pressure matcher.

9. The steam supply system according to claim 1, characterized in that: Also includes a first heater, a deaerator, and a second heater; The deaerator is connected to the boiler via the first heater, and the deaerator is connected to the heating station via the second heater.

10. The steam supply system according to claim 1, characterized in that: The first flow sensor, the second flow sensor and the third flow sensor are balanced differential pressure sensors.

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