Low-pressure heat supply efficiency enhancer of steam turbine

Abstract

The utility model relates to the technical field of steam turbine heat supply, and discloses a steam turbine low-pressure heat supply efficiency enhancer which comprises a heat exchange box, an air inlet pipe is fixedly connected to the middle of one side of the heat exchange box in a penetrating mode, an air outlet pipe is fixedly connected to the middle of the other side of the heat exchange box in a penetrating mode, and a flow dividing mechanism is arranged between the air inlet pipe and the air outlet pipe. The flow dividing mechanism comprises a flow dividing pipe, uniflow pipes, a heat exchange sleeve, a flow collecting pipe, an electromagnetic valve and a heat exchanger, one side of the middle of the flow dividing pipe is fixedly connected with one end of the air inlet pipe, and the other side of the flow dividing pipe is fixedly connected with a plurality of uniflow pipes in an array mode. The conversion efficiency of the hot steam is effectively improved, so that the low-pressure heat supply efficiency of the steam turbine is improved, and the conversion of the hot steam can be more accurately enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbine heat supply, in particular to a steam turbine low-pressure heat supply efficiency enhancer. Background Technique

[0002] Steam turbine low-pressure heat supply refers to the process of using the exhaust steam or extraction steam of the low-pressure cylinder of the steam turbine to provide heat energy, which is usually used in cogeneration systems. In the traditional steam turbine power generation process, after the steam does work in the high-pressure cylinder and the low-pressure cylinder, it is finally discharged into the condenser;

[0003] In the steam turbine low-pressure heat supply system, the exhaust steam of the low-pressure cylinder or the extraction steam at a certain stage of the low-pressure cylinder is led out. The low-pressure steam passes through the heat exchanger and transfers the heat energy to the circulating water or other working media for heating or producing hot water. At present, in order to improve the heat supply efficiency, a heat exchanger is added during the conversion of the low-pressure cylinder to improve the heat supply efficiency and reduce heat loss. However, the existing heat exchanger cannot improve its heat exchange efficiency according to the actual heat and steam volume, resulting in poor efficiency enhancement effect. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a steam turbine low-pressure heat supply efficiency enhancer, which solves the problem of low thermal cycle efficiency.

[0005] To achieve the above objectives, the utility model is realized through the following technical solutions: a steam turbine low-pressure heat supply efficiency enhancer, including a heat exchange box, a gas inlet pipe is fixedly connected through the middle of one side of the heat exchange box, a gas outlet pipe is fixedly connected through the middle of the other side of the heat exchange box, a flow splitting mechanism is arranged between the gas inlet pipe and the gas outlet pipe, the flow splitting mechanism includes a flow splitting pipe, a single-flow pipe, a heat exchange sleeve, a flow collecting pipe, an electromagnetic valve and a heat exchanger, one side of the middle of the flow splitting pipe is fixedly connected with one end of the gas inlet pipe, a plurality of single-flow pipes are fixedly connected in an array on the other side of the flow splitting pipe, the other end of each single-flow pipe is fixedly connected with one side of the flow collecting pipe, and the middle of the other side of the flow collecting pipe is fixedly connected with one end of the gas outlet pipe.

[0006] Preferably, a heat exchange sleeve is arranged on the outside of each single-flow pipe, and a heat exchanger is fixedly connected to the output end of each heat exchange sleeve.

[0007] Preferably, an electromagnetic valve is arranged at one end of each single-flow pipe close to the flow splitting pipe.

[0008] Preferably, a temperature sensor is fixedly connected to one end of the gas inlet pipe, and a temperature sensor is fixedly connected to one end of the gas outlet pipe.

[0009] Preferably, a temperature sensor is fixedly connected to one end of each single-flow pipe.

[0010] Preferably, a regulating valve is fixedly connected to one end of the intake pipe away from the heat exchange box.

[0011] Preferably, a control panel is fixedly connected to the upper surface of the heat exchange box, and the control panel is electrically connected to the flow splitting mechanism and the temperature sensor respectively.

[0012] Beneficial effects

[0013] The utility model provides a steam turbine low-pressure heating efficiency enhancer. Compared with the prior art, the following beneficial effects are achieved:

[0014] 1. In the utility model, through the arranged flow splitting mechanism, the hot steam is adjusted by the regulating valve, and then enters the inside of the flow splitting pipe through the intake pipe. By detecting the heat and the amount of the steam, the number of opened solenoid valves is controlled. Then the corresponding solenoid valves are opened, and the hot steam enters the corresponding single-flow pipes, and starts to convert the heat through the heat exchanger and the heat exchange sleeve to perform the corresponding exchange process, so that the low-pressure heating efficiency can be further enhanced, the conversion efficiency of the hot steam is effectively improved, and the low-pressure heating efficiency of the steam turbine is improved, and the conversion of the hot steam can be enhanced more precisely;

[0015] 2. In the utility model, through the arranged temperature sensor, the heat change after the steam is converted is monitored by the temperature sensor, and the temperature of the used heat exchanger is monitored by the temperature sensor on the single-flow pipe, so as to accurately monitor the heat exchange efficiency. Therefore, the number of used heat exchangers can be selected to be increased or decreased according to the specific situation of the heat exchange, so as to further improve the low-pressure heating efficiency of the steam turbine, and the conversion of the hot steam is enhanced more precisely. Description of the drawings

[0016] Figure 1 It is an overall three-dimensional structure schematic diagram of a steam turbine low-pressure heating efficiency enhancer proposed by the utility model;

[0017] Figure 2 It is an overall internal structure schematic diagram of a steam turbine low-pressure heating efficiency enhancer proposed by the utility model;

[0018] Figure 3 It is a schematic diagram of the flow splitting mechanism in a steam turbine low-pressure heating efficiency enhancer proposed by the utility model;

[0019] Figure 4 It is a schematic diagram of the installation position of the temperature sensor in a steam turbine low-pressure heating efficiency enhancer proposed by the utility model.

[0020] Legend description:

[0021] 1. Heat exchange box; 2. Control panel; 3. Control valve; 4. Intake pipe; 5. Exhaust pipe; 6. Shunt mechanism; 601. Shunt pipe; 602. Single-flow pipe; 603. Heat exchange sleeve; 604. Collector pipe; 605. Solenoid valve; 606. Heat exchanger; 7. Temperature sensor. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 - 4 , the present invention provides two technical solutions, specifically including the following embodiments:

[0024] Embodiment 1:

[0025] A steam turbine low-pressure heat supply efficiency enhancer includes a heat exchange box 1. A middle part of one side of the heat exchange box 1 is fixedly connected through penetration for the hot steam to enter the shunt mechanism 6 for use. A middle part of the other side of the heat exchange box 1 is fixedly connected through penetration with an exhaust pipe 5. The exhaust pipe 5 is connected to the steam inlet of the steam turbine for discharging the hot steam. After discharging, the hot steam flows into the steam turbine. A shunt mechanism 6 is arranged between the intake pipe 4 and the exhaust pipe 5. The shunt mechanism 6 includes a shunt pipe 601, a single-flow pipe 602, a heat exchange sleeve 603, a collector pipe 604, a solenoid valve 605 and a heat exchanger 606. One side of the middle part of the shunt pipe 601 is fixedly connected to one end of the intake pipe 4 for dispersing the hot steam. A plurality of single-flow pipes 602 are fixedly connected in an array on the other side of the shunt pipe 601. The other end of each single-flow pipe 602 is fixedly connected to one side of the collector pipe 604. Each single-flow pipe 602 starts to disperse the hot steam for heat exchange to ensure higher heat exchange efficiency. The middle part of the other side of the collector pipe 604 is fixedly connected to one end of the exhaust pipe 5. A heat exchange sleeve 603 is arranged outside each single-flow pipe 602. One heat exchanger 606 is fixedly connected to the output end of each heat exchange sleeve 603. One solenoid valve 605 is arranged at one end of each single-flow pipe 602 close to the shunt pipe 601. The number of heat exchangers 606 for heat exchange is controlled by the on / off of the solenoid valve 605.

[0026] During operation, the amount of intake air is controlled by the regulating valve 3. Subsequently, the number of solenoid valves 605 to be opened is determined according to the specific conditions of the hot steam. Then, the hot steam enters the corresponding single-flow pipe 602. Subsequently, the corresponding heat exchange sleeve 603 and the heat exchanger 606 start the heat exchange operation. Then, the hot steam is collected through the manifold 604 and then discharged through the outlet pipe 5. The discharged hot steam is fed into the steam turbine.

[0027] Embodiment 2:

[0028] Based on Embodiment 1, one end of the intake pipe 4 is fixedly connected with a temperature sensor 7 for monitoring the temperature of the incoming hot steam. One end of the outlet pipe 5 is fixedly connected with a temperature sensor 7 for monitoring the temperature of the outgoing hot steam. One end of each single-flow pipe 602 is fixedly connected with a temperature sensor 7 for monitoring the temperature of the steam that has just completed heat exchange in each single-flow pipe 602. The end of the intake pipe 4 away from the heat exchange box 1 is fixedly connected with the regulating valve 3. The upper surface of the heat exchange box 1 is fixedly connected with a control panel 2. The control panel 2 is electrically connected to the flow splitting mechanism 6 and the temperature sensor 7 respectively;

[0029] During use, the temperature sensor 7 on the intake pipe 4 is responsible for monitoring the temperature of the incoming hot steam in real time, and the temperature sensor 7 on the outlet pipe 5 is responsible for monitoring the temperature of the outgoing hot steam. The temperature sensor 7 on each single-flow pipe 602 monitors the temperature of the steam that has just completed heat exchange in each single-flow pipe 602, so as to accurately monitor the heat exchange efficiency. Thus, the number of heat exchangers 606 used can be selected to increase or decrease according to the specific heat exchange situation, thereby further improving the efficiency of low-pressure heat supply of the steam turbine and more precisely enhancing the conversion of hot steam.

[0030] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the application shall be included in the protection scope of the present application.

Claims

1. A steam turbine low-pressure heating efficiency enhancer, comprising a heat exchange box (1), an air inlet pipe (4) is fixedly connected to the middle of one side of the heat exchange box (1), an air outlet pipe (5) is fixedly connected to the middle of the other side of the heat exchange box (1), a flow dividing mechanism (6) is arranged between the air inlet pipe (4) and the air outlet pipe (5), and is characterized in that: The flow dividing mechanism (6) comprises a flow dividing pipe (601), a single flow pipe (602), a heat exchange sleeve (603), a collecting pipe (604), a solenoid valve (605) and a heat exchanger (606); one side of the middle of the flow dividing pipe (601) is fixedly connected to one end of the air inlet pipe (4); the other side of the flow dividing pipe (601) is fixedly connected to a plurality of single flow pipes (602) in an array; the other end of each of the single flow pipes (602) is fixedly connected to one side of the collecting pipe (604); and the middle of the other side of the collecting pipe (604) is fixedly connected to one end of the air outlet pipe (5).

2. A steam turbine low-pressure heating efficiency enhancer according to claim 1, characterized in that: A heat exchange jacket (603) is provided on the outside of each single flow tube (602), and a heat exchanger (606) is fixedly connected to the output end of each heat exchange jacket (603).

3. The steam turbine low-pressure heating efficiency enhancer according to claim 1, characterized in that: Each of the single flow tubes (602) is provided with a solenoid valve (605) at one end close to the branch tube (601).

4. The steam turbine low-pressure heating efficiency enhancer according to claim 1, characterized in that: One end of the air inlet pipe (4) is fixedly connected to a temperature sensor (7), and one end of the air outlet pipe (5) is fixedly connected to a temperature sensor (7).

5. The steam turbine low-pressure heating efficiency enhancer according to claim 1, characterized in that: One end of each single flow tube (602) is fixedly connected to a temperature sensor (7).

6. The steam turbine low-pressure heating efficiency enhancer according to claim 1, characterized in that: The end of the air inlet pipe (4) away from the heat exchange box (1) is fixedly connected to a regulating valve (3).

7. The steam turbine low-pressure heating efficiency enhancer according to claim 1, characterized in that: A control panel (2) is fixedly connected to the upper surface of the heat exchange box (1), and the control panel (2) is electrically connected to the diversion mechanism (6) and the temperature sensor (7) respectively.

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