Heat supply system and method of turboset

Abstract

The invention provides a heat supply system and method for a steam turbine unit, and the heat supply system comprises the steam turbine unit, a heat exchanger, a heat supply pipe network, a heat dissipation system, a water return pipe network and a control subsystem; the steam turbine unit is connected with the heat exchanger through a conveying pipe; the conveying pipe is provided with a first electric valve F1; the high end of the heat exchanger communicates with one end of the cooling system through a heat supply pipe network, and the other end of the cooling system is connected with the bottom end of the heat exchanger through a water return pipe network. The heat dissipation system is arranged in a user home in a distributed mode, the user home is provided with a second temperature sensor and a second electric valve Dn, and the second temperature sensor is used for collecting the temperature of the user home; the control subsystem comprises a first temperature sensor, a second temperature sensor and a controller; the controller is in communication connection with the first temperature sensor, the second temperature sensor, the first electric valve F1 and the second electric valve Dn. The controller processes temperature information collected by the first temperature sensor and the second temperature sensor so as to regulate and control the first electric valve F1 and the second electric valve Dn, and heat supply balance of the steam turbine unit is achieved.

Description

Technical Field

[0001] The invention relates to the field of heating, in particular to a heating system and method for a steam turbine unit. Background Art

[0002] Steam turbine units, especially steam turbine generator units, are important power conversion equipment and are widely used in thermal power plants. The heating system of steam turbine units is an efficient way of energy utilization. It mainly uses the waste heat generated by the steam turbine during the power generation process to provide heat for cities or industries. It is widely used in urban heating.

[0003] There are two purposes for the operation of the heating system. One is to ensure the room temperature and make the heat users feel comfortable; the other is to save energy as much as possible. However, it is difficult to achieve both comfort and energy saving. However, the existing heating system cannot accurately measure the heat of each household, nor can it accurately dispatch the valves of each household. Therefore, it is necessary to design a heating system for relatively accurate regulation. Summary of the invention

[0004] To solve the above technical problems, the present invention discloses a heating system and method for a steam turbine unit, which collects the room temperature of the user's home to intelligently adjust the valves in the user's home, so that the heating of the steam turbine unit meets the needs of the user's home and achieves a balance between supply and demand.

[0005] The present invention provides a heating system for a steam turbine unit, the heating system comprising a steam turbine unit, a heat exchanger, a heating pipe network, a heat dissipation system, a return pipe network, and a control subsystem;

[0006] The steam turbine unit is connected to the heat exchanger via a delivery pipe; a first electric valve F1 is provided on the delivery pipe;

[0007] The high end of the heat exchanger is connected to one end of the heat dissipation system through the heating pipe network, and the other end of the heat dissipation system is connected to the bottom end of the heat exchanger through the return pipe network; the heat dissipation system is distributedly arranged in the user's home, and a second temperature sensor and a second electric valve Dn are arranged in the user's home, and the second temperature sensor is used to collect the temperature of the user's home;

[0008] The control subsystem includes a first temperature sensor, a second temperature sensor and a controller; the controller is respectively connected to the first temperature sensor, the second temperature sensor, the first electric valve F1, and the second electric valve Dn for communication; the controller processes the temperature information collected by the first temperature sensor and the second temperature sensor to regulate the first electric valve F1 and the second electric valve Dn to achieve heat supply balance of the steam turbine unit.

[0009] The further improvement of the heating system of the present invention is that: the heating pipe network includes a main heating pipe and N sub-heating pipes; the return pipe network includes a main return pipe and N sub-return pipes;

[0010] The heat dissipation system includes N radiators arranged in the user's home, and the radiators correspond one-to-one to the sub-heating pipes and the sub-return pipes; one end of the radiator is connected to the main heating pipe through the sub-heating pipe, and the main heating pipe is connected to the high end of the heat exchanger; the other end of the radiator is connected to the main return pipe through the sub-return pipe, and the main return pipe is connected to the bottom end of the heat exchanger; N second temperature sensors are arranged, corresponding one-to-one to the radiators, and are arranged in the user's home; the second electric valves Dn are arranged one-to-one on the sub-heating pipes.

[0011] The present invention also provides a heating method for a steam turbine set, and the heating method is based on the heating system of the steam turbine set and comprises the following steps:

[0012] Step S1: inputting set heating information into the controller; the heating information includes a temperature threshold;

[0013] The controller collects the temperature information of the second sensor in each user's home, which is recorded as the second temperature Tn; the controller collects the temperature information of the first sensor, which is recorded as the outdoor temperature;

[0014] Step S2: Compare the temperature threshold with the second temperature Tn one by one to obtain a temperature difference ΔTn;

[0015] Step S3: regulating the opening of the second electric valve Dn according to the temperature difference ΔTn;

[0016] Step S4: Determine the heating parameters of the main heating pipe according to the opening of the second electric valve Dn of each sub-heating pipe, and adjust the opening of the first electric valve F1.

[0017] A further improvement of the heating method of the present invention is that step S3 comprises the following steps:

[0018] Step S31: determine whether the temperature difference △Tn is a positive value;

[0019] Step S32: if the temperature difference ΔTn is a positive value, the opening of the second electric valve Dn is not adjusted or the opening of the second electric valve Dn is increased;

[0020] Step S33: If the temperature difference ΔTn is a negative value, the opening of the second electric valve Dn is reduced.

[0021] A further improvement of the heating method of the present invention is that in step S32: if the temperature difference △Tn is a positive value and is within an allowable difference range; there is no need to adjust the opening of the second valve Dn; if the temperature difference △Tn is a positive value and is not within the allowable difference range, the opening of the second electric valve Dn is increased according to a second opening adjustment coefficient.

[0022] A further improvement of the heating method of the present invention is that the second opening adjustment coefficient is obtained by inputting the temperature difference △Tn into a proportional controller, and the larger the temperature difference △Un is, the larger the second opening adjustment coefficient is.

[0023] A further improvement of the heating method of the present invention is that in step S32, the allowable difference is 1°C-3°C.

[0024] The further improvement of the heating method of the present invention is that step S4 comprises the following steps:

[0025] Step S41: determining the heating parameters of the main heating pipe according to the opening of the second electric valve Dn of each sub-heating pipe;

[0026] Step S42: determining a heating coefficient based on the outdoor temperature;

[0027] Step S43: adjusting the opening of the first electric valve F1 based on the heating parameters, the heating coefficient and the loss coefficient of the heat exchanger so that the heating of the steam turbine unit meets the heating parameters of the main heating pipe.

[0028] A further improvement of the heating method of the present invention is that in step S42: the lower the outdoor temperature, the greater the heating coefficient; the higher the outdoor temperature, the smaller the heating coefficient.

[0029] Beneficial effects of the present invention:

[0030] The heating system of the present invention serves as a basic support, and in combination with the method, the temperature of the user's home can be measured and compared with the set temperature threshold to adjust the opening of the valve, and the turbine unit can be adjusted by regulating the entire large valve, thereby achieving precise regulation and achieving a balance between supply and demand between the heating system and the user. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is clearly and completely described below in conjunction with the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] The present invention discloses a heating system and method for a steam turbine unit, which collects the room temperature of a user's home to intelligently regulate the valves in the user's home, so that the heating of the steam turbine unit meets the needs of the user's home and achieves a balance between supply and demand.

[0033] The present invention provides a heating system for a steam turbine unit, comprising a steam turbine unit, a heat exchanger, a heating pipe network, a heat dissipation system, a return water pipe network, and a control subsystem.

[0034] The steam turbine unit is used to provide the heat required by the heat dissipation system. The steam turbine unit is connected to the heat exchanger through a delivery pipe; a first electric valve F1 is provided on the delivery pipe. The opening degree of the first electric valve F1 can affect the heat supply of the steam turbine unit.

[0035] The control subsystem includes a first temperature sensor, a second temperature sensor and a controller. The first temperature sensor is arranged outdoors and is used to detect outdoor temperature information.

[0036] The high end of the heat exchanger is connected to one end of the heat dissipation system through the heating pipe network, and the other end of the heat dissipation system is connected to the bottom end of the heat exchanger through the return pipe network.

[0037] The heat dissipation system includes a plurality of radiators, which are arranged in the user's home to provide heat to the user's home. Each user's home is provided with a second temperature sensor for detecting the temperature of the user's home.

[0038] The heating pipe network includes a main heating pipe and N sub-heating pipes; the return pipe network includes a main return pipe and N sub-return pipes; the radiator corresponds to the sub-heating pipe and the sub-return pipe one by one; one end of the radiator is connected to the main heating pipe through the sub-heating pipe, and the main heating pipe is connected to the high end of the heat exchanger; the other end of the radiator is connected to the main return pipe through the sub-return pipe, and the main return pipe is connected to the bottom end of the heat exchanger. Each sub-heating pipe is provided with a second electric valve Dn, and the opening of the second electric valve Dn can affect the radiator, thereby affecting the temperature of the user's home.

[0039] The controller is respectively connected to the first temperature sensor, the second temperature sensor, the first electric valve F1, and the second electric valve Dn for communication; the controller processes the temperature information collected by the first temperature sensor and the second temperature sensor to adjust the first electric valve F1 and the second electric valve Dn to achieve the heat supply balance of the steam turbine unit.

[0040] Specifically, the present invention also provides a heating method, the purpose of which is to keep the heating supply of the steam turbine unit and the heat consumption of the user's home as balanced as possible based on the system. The heating method is carried out under the control of the controller.

[0041] A method for supplying heat to a steam turbine unit comprises the following steps:

[0042] Step S1: inputting set heating information into the controller; the heating information includes a temperature threshold;

[0043] The controller collects the temperature information of the second sensor in each user's home, which is recorded as the second temperature Tn; the controller collects the temperature information of the first sensor, which is recorded as the outdoor temperature.

[0044] Step S2: Compare the temperature threshold with the second temperature Tn one by one to obtain a temperature difference ΔTn;

[0045] Step S3: regulating the opening of the second electric valve Dn according to the temperature difference ΔTn;

[0046] Specifically, step S3 includes the following steps:

[0047] Step S31: determine whether the temperature difference △Tn is a positive value;

[0048] Step S32: If the temperature difference △Tn is a positive value, the opening of the second electric valve Dn is not adjusted or the opening of the second electric valve Dn is increased; specifically, if the temperature difference △Tn is a positive value and is within an allowable difference range, the opening of the second valve Dn does not need to be adjusted; if the temperature difference △Tn is a positive value and is not within the allowable difference range, the opening of the second electric valve Dn is increased according to a second opening adjustment coefficient. The second opening adjustment coefficient is obtained by inputting the temperature difference △Tn into a proportional controller. The larger the temperature difference △Un, the larger the second opening adjustment coefficient. The larger the second opening adjustment coefficient, the larger the opening adjustment of the second electric valve Dn.

[0049] Step S33: If the temperature difference ΔTn is a negative value, the opening of the second electric valve Dn is appropriately reduced.

[0050] Step S4: Determine the heating parameters of the main heating pipe according to the opening of the second electric valve Dn of each sub-heating pipe, and adjust the opening of the first electric valve F1.

[0051] Specifically, step S4 includes the following steps:

[0052] Step S41: Determine the heating parameters of the main heating pipe according to the opening of the second electric valve Dn of each sub-heating pipe; this step is actually to determine the total amount of heat required by all users through the heat required by each user's home, so as to adjust the supply of the turbine unit.

[0053] Step S42: Determine a heating coefficient based on the outdoor temperature; the heating coefficient is obtained by inputting the outdoor temperature into a proportional controller. The lower the outdoor temperature, the greater the heating coefficient, and the higher the outdoor temperature, the smaller the heating coefficient.

[0054] Step S43: adjusting the opening of the first electric valve F1 based on the heating parameters, the heating coefficient and the loss coefficient of the heat exchanger so that the heating of the steam turbine meets the heating parameters of the main heating pipe.

[0055] It is understandable that the lower the outdoor temperature, the more difficult it is for the user's home to reach the required temperature threshold. Therefore, the lower the outdoor temperature, the more heat needs to be supplied. In addition, the heat exchanger will also lose some heat during the heat exchange process, which is why the loss coefficient is considered. The loss coefficient of the heat exchanger is a parameter of the heat exchanger itself.

[0056] It should be noted that: neither the first electric valve F1 nor the second electric valve Dn will be fully opened even at the highest limit. That is to say, under this heating system, the steam turbine unit, the first electric valve F1, and the second electric valve Dn can meet the control requirements.

[0057] A specific implementation example: Assume that there are 4 user households.

[0058] Step S1: Set the temperature threshold to 20°C. The allowable difference is 2°C. The collected outdoor temperature is 0°C.

[0059] User home 1: The second electric valve D1 and the second temperature T1 are 16°C.

[0060] User home 2: The second electric valve D2 and the second temperature T2 are 19°C.

[0061] User home 3: The second electric valve D3 and the second temperature T3 are 21°C.

[0062] User home 3: the second electric valve D4 and the second temperature T4 are 14°C.

[0063] Step S2: comparing the temperature threshold with the second temperature Tn one by one to obtain a temperature difference ΔTn;

[0064] △T1 is 4℃; △T2 is 1℃; △T3 is -1℃; △T4 is 6℃.

[0065] Step S3: regulating the opening of the second electric valve Dn according to the temperature difference ΔTn;

[0066] △T1 is 4°C, which is a positive value and is greater than the allowable difference of 2°C. Therefore, the opening of the second electric valve D1 is increased to allow more heat to flow into the user's home 1.

[0067] △T2 is 1°C, which is a positive value and is less than the allowable difference of 2°C. Therefore, there is no need to adjust the opening of the second electric valve D2, so that the heat flowing into the user's home 2 remains unchanged.

[0068] △T3 is -1°C, which is a negative value. Therefore, the opening of the second electric valve D1 can be appropriately reduced to reduce the heat flowing into the radiator of user home 1, thereby reducing the heat flowing into user home 3.

[0069] △T4 is 6℃, which is a positive value and is greater than the allowable difference of 2℃, so the opening of the second electric valve D4 is increased to allow more heat to flow into the radiator of user home 4. Since △T4 of user home 4 is greater than △T1 of user home 1, the opening adjustment value of the second electric valve D4 is greater than the opening adjustment value of the second electric valve D1.

[0070] Step S4: According to the opening conditions of the second electric valve D1, the second electric valve D2, the second electric valve D3 and the second electric valve D4, the total heat required by the entire heating network, that is, the heating parameters of the main heating pipe, can be determined. The heating coefficient is determined by the outdoor temperature being 0°C.

[0071] The opening of the first electric valve F1 is scheduled according to the heat supply parameter, the heat supply coefficient and the loss coefficient.

[0072] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A heating system for a steam turbine unit, characterized in that: The heating system includes a steam turbine unit, a heat exchanger, a heating pipe network, a heat dissipation system, a return pipe network, and a control subsystem; The steam turbine unit is connected to the heat exchanger via a delivery pipe; a first electric valve F1 is provided on the delivery pipe; The high end of the heat exchanger is connected to one end of the heat dissipation system through the heating pipe network, and the other end of the heat dissipation system is connected to the bottom end of the heat exchanger through the return pipe network; the heat dissipation system is distributed in the user's home, and each user's home is provided with a second temperature sensor and a second electric valve Dn, and the second temperature sensor is used to collect the temperature of the user's home; The control subsystem includes a first temperature sensor, a second temperature sensor and a controller; the controller is respectively connected to the first temperature sensor, the second temperature sensor, the first electric valve F1, and the second electric valve Dn for communication; the controller processes the temperature information collected by the first temperature sensor and the second temperature sensor to regulate the first electric valve F1 and the second electric valve Dn to achieve heat supply balance of the steam turbine unit.

2. The heating system of the steam turbine unit according to claim 1, characterized in that: The heating pipe network includes a main heating pipe and N sub-heating pipes; the return pipe network includes a main return pipe and N sub-return pipes; The heat dissipation system includes N radiators arranged in the user's home, and the radiators correspond one-to-one to the sub-heating pipes and the sub-return pipes; one end of the radiator is connected to the main heating pipe through the sub-heating pipe, and the main heating pipe is connected to the high end of the heat exchanger; the other end of the radiator is connected to the main return pipe through the sub-return pipe, and the main return pipe is connected to the bottom end of the heat exchanger; N second temperature sensors are arranged, corresponding one-to-one to the radiators, and are arranged in the user's home; the second electric valves Dn are arranged one-to-one on the sub-heating pipes.

3. A heating method for a steam turbine unit, the heating method being based on the heating system for a steam turbine unit according to claim 2, characterized in that: The steps include: Step S1: inputting set heating information into the controller; the heating information includes a temperature threshold; The controller collects the temperature information of the second sensor in each user's home, which is recorded as the second temperature Tn; the controller collects the temperature information of the first sensor, which is recorded as the outdoor temperature; Step S2: Compare the temperature threshold with the second temperature Tn one by one to obtain a temperature difference ΔTn; Step S3: regulating the opening of the second electric valve Dn according to the temperature difference ΔTn; Step S4: Determine the heating parameters of the main heating pipe according to the opening of the second electric valve Dn of each sub-heating pipe, and adjust the opening of the first electric valve F1.

4. The method for supplying heat to a steam turbine unit according to claim 3, characterized in that: The step S3 comprises the following steps: Step S31: determine whether the temperature difference △Tn is a positive value; Step S32: if the temperature difference ΔTn is a positive value, the opening of the second electric valve Dn is not adjusted or the opening of the second electric valve Dn is increased; Step S33: If the temperature difference ΔTn is a negative value, the opening of the second electric valve Dn is reduced.

5. The method for supplying heat to a steam turbine unit according to claim 4, characterized in that: In step S32, if the temperature difference ΔTn is positive and within an allowable difference range, there is no need to adjust the opening of the second valve Dn; if the temperature difference ΔTn is positive and not within the allowable difference range, the opening of the second electric valve Dn is increased according to a second opening adjustment coefficient.

6. The method for supplying heat to a steam turbine unit according to claim 5, characterized in that: The second opening adjustment coefficient is obtained by inputting the temperature difference △Tn into a proportional controller. The larger the temperature difference △Un is, the larger the second opening adjustment coefficient is, and the larger the opening adjustment of the corresponding second electric valve Dn is.

7. The method for supplying heat to a steam turbine unit according to claim 5, characterized in that: In step S32, the allowable difference is 1°C-3°C.

8. The method for supplying heat to a steam turbine unit according to claim 3, characterized in that: Step S4 includes the following steps: Step S41: determining the heating parameters of the main heating pipe according to the opening of the second electric valve Dn of each sub-heating pipe; Step S42: determining a heating coefficient based on the outdoor temperature; Step S43: adjusting the opening of the first electric valve F1 based on the heating parameters, the heating coefficient and the loss coefficient of the heat exchanger so that the heating of the steam turbine unit meets the heating parameters of the main heating pipe.

9. The method for supplying heat to a steam turbine unit according to claim 5, characterized in that: In step S42: the lower the outdoor temperature, the greater the heating coefficient; the higher the outdoor temperature, the smaller the heating coefficient.