Low-vacuum heat supply system for bio-based thermal power plant
By using heat-condensing blocks on the outside of the U-tube and copper tubes to preheat the water in the steam generator in the low-vacuum heating system of a bio-based thermal power plant, and automatically clean the scale with a temperature sensor and a motor-driven round hammer, the solution is solved The heat loss and scaling problems during steam transportation improve efficiency and energy saving effects.
Patent Information
- Application Number
- CN202420821716.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-19
AI Technical Summary
In bio-based thermal power plants, there is a large heat loss during steam transport and the inner wall of the pipeline is prone to scale, resulting in a reduced conveying efficiency.
A low vacuum heating system is designed, using the second heat-condensing block outside the U-shaped tube to absorb the steam heat and conduct it to the second heat-condensing block below through the copper tube. Preheated condensed water flows back into the steam generator and passes through the The temperature sensor and motor-driven round hammer automatically cleans up the scaling in the U-shaped tube.
It effectively avoids heat loss, reduces heat loss during steam transport, automatically cleans up scale, improves steam transport efficiency, and saves heat energy resources.
Smart Images
Figure CN222187103U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thermal power plants, in particular to a low vacuum heating system for a bio-based thermal power plant. Background Art
[0002] Bio-based refers to a new type of material made from renewable biomass, including grains, legumes, straw, bamboo powder, animal fur waste, etc., through biological, chemical, physical and other means. It mainly includes bioplastics, bio-based platform compounds, biomass functional polymers, functional sugar products, wood-based engineering materials, leather-based service materials and other products. It is green, environmentally friendly, renewable and biodegradable. Most of them are used as fuel for thermal power plants. In order to save energy, people began to study the use of exhaust steam from steam turbines for heating and waste heat utilization. When the exhaust pressure of the steam turbine is in the low vacuum range (the back pressure is generally not less than 18kPa), this function can be achieved. Therefore, this heating technology is also called low vacuum heating technology. The low vacuum circulating water heating of the steam turbine is to use the radiator of the heat user as a cooling device. There is no major modification to the unit body. Only the condenser inlet and outlet pipes are connected to the circulating water heating system. In actual use, the steam after circulating water cooling is condensed into water, and then transported back to the steam generator through a water pump to evaporate again to form steam.
[0003] However, some steam now has large heat loss during transportation, wasting a lot of thermal energy resources. At the same time, the inner wall of the steam transportation pipe is prone to scaling, thereby reducing the transportation efficiency. For this reason, we propose a low-vacuum heating system for bio-based thermal power plants to solve the above problems. Utility Model Content
[0004] The purpose of the utility model is to provide a low vacuum heating system for a bio-based thermal power plant to solve the problems raised in the above background technology.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low vacuum heating system for a bio-based thermal power plant, comprising a bottom plate, a box body is fixedly connected to the top of the bottom plate, a condenser is fixedly connected to the top of the bottom plate, a water tank is fixedly connected to the top of the bottom plate, a steam turbine is arranged above the condenser, a steam generator is fixedly connected to the rear inner wall of the box body, an air intake pipe is connected and fixed to the left side of the steam generator, a pressure tank is fixedly connected to the rear inner wall of the box body, a U-shaped pipe is connected and fixed between the steam generator and the steam turbine, an L-shaped pipe is connected and fixed to the right side of the steam generator, a first heat collecting block and a second heat collecting block are arranged on the outer fixed sleeve of the U-shaped pipe, and a second heat collecting block is arranged on the outer fixed sleeve of the L-shaped pipe. A heat block, a plurality of copper tubes are fixedly connected between the corresponding two second heat-collecting blocks, a motor is fixedly connected to the right side of the box, a round rod is rotatably connected to the right inner wall of the box, the right end of the round rod is fixedly connected to the output shaft end of the motor, an elastic vertical block is fixedly connected to the outer side of the round rod, a round hammer is fixedly connected to the top of the elastic vertical block, a control panel is fixedly connected to the front side of the box, the motor is electrically connected to the control panel through a conductive line, a first temperature sensor is fixedly connected to the left side of the first heat-collecting block, the first temperature sensor is electrically connected to the control panel through a conductive line, a second temperature sensor is fixedly connected to the top of the second heat-collecting block above, the second temperature sensor is electrically connected to the control panel through a conductive line.
[0006] Further preferably, a heating block is fixedly connected to the front side of the pressure tank, a first water pump is fixedly connected to the rear inner wall of the box body, a water inlet pipe of the first water pump extends into the pressure tank, and a water outlet pipe of the first water pump is connected and fixedly connected to a connecting pipe.
[0007] Further preferably, the top end of the connecting pipe extends into the steam generator, and the steam generator and the pressure tank are connected and fixed with a transverse pipe.
[0008] Further preferably, a pressure stabilizer is connected to and fixed on the top of the transverse pipe, and a second water pump and a third water pump are provided above the bottom plate.
[0009] Further preferably, the water inlet pipe of the second water pump extends into the condenser, and the water outlet pipe of the second water pump is connected to and fixed to the bottom end of the L-shaped tube.
[0010] Further preferably, the water inlet pipe of the third water pump extends into the water pool, the water outlet pipe of the third water pump extends into the condenser and is connected and fixedly connected with an S-shaped pipe, and two vertical pipes are connected and fixed between the condenser and the steam turbine.
[0011] Further preferably, a drain pipe is provided above the water pool, and the left end of the drain pipe is connected to and fixed to the S-shaped pipe.
[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the second heat-collecting block on the outside of the U-shaped tube of the present invention absorbs the heat generated by the steam and collects the heat, and conducts the heat to a second heat-collecting block below through the copper tube, so that the condensed water can be preheated and then flow back into the steam generator, avoiding heat loss. When scaling appears in the U-shaped tube, the steam circulation rate is reduced, causing the steam to gather at the connection between the steam generator and the U-shaped tube. At this time, the temperature of the first temperature sensor is slightly higher than that of the second temperature sensor, and the signal is transmitted to the control panel through the conduction line. The control panel controls the motor to start and drive the hammer to knock on the outside of the U-shaped tube, so that the scaling in the U-shaped tube can be shaken off, thereby reducing the heat loss of steam during the transportation process and saving a large amount of thermal energy resources. At the same time, it can automatically clean the scaling generated on the inner wall of the transportation pipeline, saving time and effort, thereby improving the efficiency of steam transportation. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the main plane structure of the utility model;
[0014] Figure 2 It is a schematic diagram of the front side cross-sectional plan structure of the utility model;
[0015] Figure 3 for Figure 2 A schematic diagram of the enlarged three-dimensional structure of the middle A area;
[0016] Figure 4 for Figure 2 Schematic diagram of the enlarged three-dimensional structure of area B in the middle.
[0017] In the figure: 1, bottom plate; 2, box body; 3, condenser; 4, water tank; 5, turbine; 6, steam generator; 7, pressure tank; 8, U-shaped pipe; 9, first heat collecting block; 10, second heat collecting block; 11, first temperature sensor; 12, second temperature sensor; 13, control panel; 14, motor; 15, round rod; 16, elastic vertical block; 17, round hammer; 18, copper pipe; 19, L-shaped pipe; 20, heating block; 21, first water pump; 22, connecting pipe; 23, horizontal pipe; 24, stabilizer; 25, second water pump; 26, third water pump; 27, vertical pipe; 28, S-shaped pipe; 29, drain pipe; 30, air intake pipe. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] Example
[0020] See also Figure 1-4 The utility model provides a technical solution: a low vacuum heating system for a bio-based thermal power plant, comprising a bottom plate 1, a box body 2 is fixedly connected to the top of the bottom plate 1, a condenser 3 is fixedly connected to the top of the bottom plate 1, a water tank 4 is fixedly connected to the top of the bottom plate 1, a steam turbine 5 is arranged above the condenser 3, a steam generator 6 is fixedly connected to the rear inner wall of the box body 2, an air intake pipe 30 is connected and fixed to the left side of the steam generator 6, a pressure tank 7 is fixedly connected to the rear inner wall of the box body 2, a U-shaped pipe 8 is connected and fixed between the steam generator 6 and the steam turbine 5, and an L-shaped pipe 1 is connected and fixed to the right side of the steam generator 6 9, the outer fixed sleeve of the U-shaped tube 8 is provided with a first heat collecting block 9 and a second heat collecting block 10, the outer fixed sleeve of the L-shaped tube 19 is provided with a second heat collecting block 10, and a plurality of copper tubes 18 are fixedly connected between the two corresponding second heat collecting blocks 10, the right side of the box body 2 is fixedly connected with a motor 14, the right side inner wall of the box body 2 is rotatably connected with a round rod 15, the right end of the round rod 15 is fixedly connected with the output shaft end of the motor 14, the outer side of the round rod 15 is fixedly connected with an elastic vertical block 16, the top of the elastic vertical block 16 is fixedly connected with a round hammer 17, the front side of the box body 2 is fixedly connected with a control panel 13, and the motor 14 is connected to the control panel through a conductive line 13 is electrically connected, a first temperature sensor 11 is fixedly connected to the left side of the first heat collecting block 9, and the first temperature sensor 11 is electrically connected to the control panel 13 through a conductive line, and a second temperature sensor 12 is fixedly connected to the top of a second heat collecting block 10 above, and the second temperature sensor 12 is electrically connected to the control panel 13 through a conductive line. The second heat collecting block 10 outside the U-shaped tube 8 absorbs the heat generated by the steam and conducts the heat to the second heat collecting block 10 below through the copper tube 18, so that the condensed water can be preheated and then flow back into the steam generator 6, avoiding the loss of heat. When the U-shaped tube When scaling appears in 8, the steam circulation rate decreases, causing steam to gather at the connection between the steam generator 6 and the U-shaped tube 8. At this time, the temperature of the first temperature sensor 11 is slightly higher than that of the second temperature sensor 12. The signal is transmitted to the control panel 13 through the conduction line. The control panel 13 controls the motor 14 to start and drive the hammer 17 to knock on the outside of the U-shaped tube 8, so that the scaling in the U-shaped tube 8 can be shaken off, thereby reducing the heat loss of steam during the transportation process and saving a lot of thermal energy resources. At the same time, it can automatically clean the scaling generated on the inner wall of the transportation pipeline, saving time and effort, thereby improving the efficiency of steam transportation.
[0021] In this embodiment, specifically: a heating block 20 is fixedly connected to the front side of the pressure tank 7, a first water pump 21 is fixedly connected to the inner wall of the rear side of the box body 2, a water inlet pipe of the first water pump 21 extends into the pressure tank 7, and a water outlet pipe of the first water pump 21 is connected and fixed with a connecting pipe 22, and the setting of the heating block 20 has a heating effect;
[0022] In this embodiment, specifically: the top end of the connecting pipe 22 extends into the steam generator 6, and the steam generator 6 and the pressure tank 7 are connected and fixed with a horizontal pipe 23, and the setting of the horizontal pipe 23 plays a conveying effect;
[0023] In this embodiment, specifically: the top of the horizontal pipe 23 is connected to and fixed with a pressure stabilizer 24, and a second water pump 25 and a third water pump 26 are provided above the bottom plate 1. The setting of the pressure stabilizer 24 has the effect of stabilizing the pressure;
[0024] In this embodiment, specifically: the water inlet pipe of the second water pump 25 extends into the condenser 3, the water outlet pipe of the second water pump 25 is connected and fixed to the bottom end of the L-shaped tube 19, and the setting of the second water pump 25 plays a role in pumping water;
[0025] In this embodiment, specifically: the water inlet pipe of the third water pump 26 extends into the water pool 4, the water outlet pipe of the third water pump 26 extends into the condenser 3 and is connected and fixedly connected with an S-shaped pipe 28, and the condenser 3 and the steam turbine 5 are connected and fixed with two vertical pipes 27, and the setting of the S-shaped pipe 28 has the effect of increasing the contact area;
[0026] In this embodiment, specifically: a drain pipe 29 is provided above the pool 4, and the left end of the drain pipe 29 is connected to and fixed with the S-shaped pipe 28, and the setting of the drain pipe 29 has a drainage effect.
[0027] The utility model is in operation: when in use, the steam generated by bio-based combustion is transported to the steam generator 6 through the air intake pipe 30, the steam is transported to the steam turbine 5 through the U-shaped pipe 8, and then enters the condenser 3 through the vertical pipe 27, the third water pump 26 pumps the circulating water in the water pool 4 into the condenser 3, the circulating water passes through the S-shaped pipe 28 and is finally discharged back to the water pool 4 through the drain pipe 29 to form a loop, the steam meets the circulating water in the condenser 3 and condenses to form water that falls to the bottom of the condenser 3, the second water pump 25 pumps out the water at the bottom of the condenser 3 and transports it to the steam generator 6 through the L-shaped pipe 19, the first water pump 21 pumps the water in the steam generator 6 into the pressure tank 7, is heated by the heating block 20 and is again formed into steam and transported back to the steam generator 6, the second heat collecting block 10 outside the U-shaped pipe 8 absorbs the heat generated by the steam and collects the heat and conducts it to a second heat collecting block 10 below through the copper pipe 18, and the second heat collecting block 10 below collects the heat and then conducts The steam is guided to the L-shaped tube 19 so that the condensed water can be preheated and then flow back into the steam generator 6, avoiding heat loss. When scaling occurs in the U-shaped tube 8, the steam circulation rate is reduced, causing steam to gather at the connection between the steam generator 6 and the U-shaped tube 8. At this time, the temperature of the first temperature sensor 11 is slightly higher than that of the second temperature sensor 12. The signal is transmitted to the control panel 13 through the conduction line. The control panel 13 controls the motor 14 to start. The output shaft of the motor 14 drives the round rod 15 to rotate, and the round rod 15 drives the elastic vertical block 16 to rotate. The elastic vertical block 16 drives the round hammer 17 to knock on the outside of the U-shaped tube 8, so that the scaling in the U-shaped tube 8 can be shaken off, thereby forming a low-vacuum heating system for a bio-based thermal power plant, which can reduce the heat loss of steam during transportation and save a lot of thermal energy resources. At the same time, it can automatically clean the scaling generated on the inner wall of the transportation pipeline, saving time and effort, thereby improving the efficiency of steam transportation.
[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A low vacuum heating system for a bio-based thermal power plant, comprising a base plate (1), characterized in that: The top of the bottom plate (1) is fixedly connected to a box body (2), the top of the bottom plate (1) is fixedly connected to a condenser (3), the top of the bottom plate (1) is fixedly connected to a water tank (4), a steam turbine (5) is arranged above the condenser (3), a steam generator (6) is fixedly connected to the rear inner wall of the box body (2), the left side of the steam generator (6) is connected to and fixed with an air intake pipe (30), and the rear inner wall of the box body (2) is fixedly connected to a steam generator (6). A pressure tank (7) is provided, a U-shaped tube (8) is connected and fixed between the steam generator (6) and the steam turbine (5), an L-shaped tube (19) is connected and fixed on the right side of the steam generator (6), a first heat collecting block (9) and a second heat collecting block (10) are fixedly sleeved on the outside of the U-shaped tube (8), a second heat collecting block (10) is fixedly sleeved on the outside of the L-shaped tube (19), and a plurality of copper tubes are fixedly connected between the two corresponding second heat collecting blocks (10) (18), a motor (14) is fixedly connected to the right side of the box (2), a round rod (15) is rotatably connected to the right inner wall of the box (2), the right end of the round rod (15) is fixedly connected to the output shaft end of the motor (14), an elastic vertical block (16) is fixedly connected to the outer side of the round rod (15), a round hammer (17) is fixedly connected to the top of the elastic vertical block (16), a control panel (13) is fixedly connected to the front side of the box (2), the motor (14) is electrically connected to the control panel (13) through a conductive line, a first temperature sensor (11) is fixedly connected to the left side of the first heat collecting block (9), the first temperature sensor (11) is electrically connected to the control panel (13) through a conductive line, and a second temperature sensor (12) is fixedly connected to the top of the second heat collecting block (10) above, the second temperature sensor (12) is electrically connected to the control panel (13) through a conductive line.
2. The low vacuum heating system for a bio-based thermal power plant according to claim 1, characterized in that: A heating block (20) is fixedly connected to the front side of the pressure tank (7), a first water pump (21) is fixedly connected to the inner wall of the rear side of the box body (2), a water inlet pipe of the first water pump (21) extends into the pressure tank (7), and a water outlet pipe of the first water pump (21) is connected to and fixed with a connecting pipe (22).
3. The low vacuum heating system for a bio-based thermal power plant according to claim 2, characterized in that: The top end of the connecting pipe (22) extends into the steam generator (6), and the steam generator (6) and the pressure tank (7) are connected and a transverse pipe (23) is fixed therebetween.
4. The low vacuum heating system for a bio-based thermal power plant according to claim 3, characterized in that: The top of the transverse pipe (23) is connected to and fixed with a pressure stabilizer (24), and a second water pump (25) and a third water pump (26) are provided above the bottom plate (1).
5. The low vacuum heating system for a bio-based thermal power plant according to claim 4, characterized in that: The water inlet pipe of the second water pump (25) extends into the condenser (3), and the water outlet pipe of the second water pump (25) is connected to and fixed to the bottom end of the L-shaped pipe (19).
6. The low vacuum heating system for a bio-based thermal power plant according to claim 5, characterized in that: The water inlet pipe of the third water pump (26) extends into the water pool (4), and the water outlet pipe of the third water pump (26) extends into the condenser (3) and is connected to and fixedly connected with an S-shaped pipe (28). The condenser (3) and the steam turbine (5) are connected to and fixedly connected with two vertical pipes (27).
7. The low vacuum heating system for a bio-based thermal power plant according to claim 6, characterized in that: A drainage pipe (29) is provided above the water pool (4), and the left end of the drainage pipe (29) is connected to and fixed to the S-shaped pipe (28).