Boiler blow-off heat energy utilization system

Abstract

The utility model relates to the technical field of waste incineration, in particular to a boiler blow-off heat energy utilization system which comprises a secondary combustion chamber, a heater communicated with the secondary combustion chamber and an air blower installed at an air inlet of the heater. One end of a heating pipeline of the heater is communicated with a boiler sewage pipe, the other end of the heating pipeline of the heater is communicated into the heat exchanger, an output pipeline of the heat exchanger is communicated with a cooling assembly, and one end of a heat exchange pipeline of the heat exchanger is communicated with the water tank through a water pump. According to the utility model, the secondary combustion chamber is used for heating air entering the secondary combustion chamber, and the cooled sewage is introduced into the heat exchanger after heating is completed, so that tap water pumped into the boiler is heated, the boiler sewage is secondarily heated and utilized, and the maximum utilization of heat energy can be realized; the boiler sewage treatment device can be used for cooling and deacidifying discharged boiler sewage so as to meet the requirement of environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of waste incineration technology, and in particular to a boiler blowdown heat energy utilization system. Background Technology

[0002] Currently, hazardous waste incinerators generally adopt a "combustion + waste heat recovery" technical approach. The main function of the boiler is to recover the heat energy from the high-temperature flue gas generated during waste incineration, converting it into steam for power generation or heating. The secondary combustion chamber, through high-temperature oxidation, ensures the thoroughness and harmlessness of waste incineration, providing high-temperature flue gas to the boiler. This synergistic effect not only improves the overall efficiency of waste incineration but also achieves the dual goals of energy recovery and environmental protection.

[0003] Traditional boiler systems typically use a single heat exchange device to initially cool wastewater before discharging it. While this method can lower the temperature of the wastewater, it cannot fully recover and utilize the heat energy in the wastewater, resulting in energy waste.

[0004] Based on this, in order to realize the heat recovery and utilization of boiler wastewater, we propose a boiler wastewater heat energy utilization system. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as the inability to fully recover and utilize the heat energy in wastewater, which leads to energy waste, and to propose a boiler blowdown heat energy utilization system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a boiler blowdown heat energy utilization system, including:

[0008] The secondary combustion chamber, the heater connected to the secondary combustion chamber, and the blower installed at the air inlet of the heater;

[0009] The heater's heating pipe is connected to the boiler's wastewater pipe at one end and to the heat exchanger at the other end. The heat exchanger's output pipe is connected to a cooling component. The heat exchanger's heat exchange pipe is connected to a water tank at one end via a water pump and to the boiler at the other end for water supply.

[0010] Furthermore, the cooling component includes a wastewater tank connected to the output end of the heat exchanger, and one end of the wastewater tank is connected to a cooling tower via a cooling pump.

[0011] Furthermore, the wastewater tank includes a tank body;

[0012] The tank has a water inlet at the upper end and a motor is fixedly installed at the bottom of the tank. The shaft of the motor passes through the interior of the tank and is fixed with a pulsator.

[0013] Furthermore, a scale rod is movably inserted into the upper end of the tank, and a float is fixedly installed at the bottom of the scale rod, with the float placed inside the tank.

[0014] Furthermore, the upper end of the float is formed with a sleeve, the bottom end of the scale rod is inserted into the inner side of the sleeve, wherein a positioning glass bead is embedded on the outer side of the bottom of the scale rod, and a hole adapted to the positioning glass bead is opened on the outer side of the sleeve.

[0015] Furthermore, a lid is detachably connected to the top of the tank, and a transparent window is provided at the front end of the tank.

[0016] The boiler wastewater heat energy utilization system proposed in this utility model has the following advantages: In this utility model, the high-temperature wastewater discharged from the boiler is first introduced into a heater to heat the incoming air in the secondary combustion chamber. After heating, the cooled wastewater is then introduced into a heat exchanger to heat the tap water pumped into the boiler. By utilizing the secondary heating of the boiler wastewater, the utilization of heat energy can be maximized. At the same time, this utility model is also equipped with a cooling component, which can be used to cool and deacidify the discharged boiler wastewater to meet environmental protection requirements. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the system connection of this utility model;

[0018] Figure 2 This is a schematic diagram of the sewage tank structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the sewage tank of this utility model;

[0020] Figure 4 for Figure 3 A magnified structural diagram of area A.

[0021] In the diagram: 1. Secondary combustion chamber; 2. Heater; 21. Heating pipe; 3. Blower; 4. Boiler wastewater pipe; 5. Heat exchanger; 51. Heat exchange pipe; 6. Cooling component; 61. Wastewater tank; 611. Tank body; 612. Water inlet; 613. Motor; 614. Impeller; 615. Scale rod; 616. Float; 617. Sleeve; 618. Positioning glass bead; 619. Tank lid; 620. Transparent window; 62. Cooling pump; 63. Cooling tower; 7. Water pump; 8. Water tank. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-4 As an embodiment of this utility model, a boiler blowdown heat energy utilization system is disclosed. Specifically, the system includes a secondary combustion chamber 1, a heater 2 connected to the secondary combustion chamber 1, and a blower 3 installed at the air inlet of the heater 2. During operation, the blower 3 blows air into the interior of the secondary combustion chamber 1. At the same time, due to the presence of the heater 2, the air entering the secondary combustion chamber 1 can be heated.

[0024] The heating pipe 21 of the heater 2 is connected at one end to the boiler wastewater pipe 4 and at the other end to the heat exchanger 5. Specifically, in this embodiment, the heating pipe 21 is distributed in a serpentine structure so that when the high-temperature wastewater in the boiler wastewater pipe 4 enters, it can heat the air supplied by the blower 3, thereby ensuring that the air entering the secondary combustion chamber 1 is at a high temperature. The output pipe of the heat exchanger 5 is connected to the cooling component 6. One end of the heat exchange pipe 51 of the heat exchanger 5 is connected to the water tank 8 through the water pump 7, and the other end is connected to the boiler for water supply. In addition, the heat exchanger 5 in this embodiment is a water-to-water heat exchanger to meet the heat exchange between the boiler wastewater and the boiler feedwater. That is, when the water pump 7 supplies the tap water in the water tank 8 into the heat exchange pipe 51, it will exchange heat with the boiler wastewater and heat up, thereby ensuring that the tap water entering the boiler is also at a high temperature.

[0025] In other words, in this utility model, the boiler wastewater pipe 4 first pumps the boiler wastewater carrying high temperature to the interior of the heater 2 through the pump, and then heats the air supplied by the blower 3 before blowing it into the secondary combustion chamber 1.

[0026] After heat exchange, the boiler wastewater still has a certain usable temperature. Therefore, the wastewater that is not fully utilized is discharged into heat exchanger 5 to further heat the boiler feedwater circuit. After heating, the boiler discharge is at room temperature, so as to make full use of the boiler wastewater.

[0027] In some embodiments, the cooling component 6 of the present invention includes a wastewater tank 61 connected to the output end of the heat exchanger 5, and one end of the wastewater tank 61 is connected to the cooling tower 63 through a cooling pump 62.

[0028] As described above, after the boiler wastewater undergoes two heat exchanges, it will return to normal temperature. At this point, it will flow into the wastewater tank 61, where the boiler wastewater and tap water in the wastewater tank 61 will be mixed. The ratio of boiler wastewater to tap water is approximately 1:3 to prevent blockage of the pipe spray gun. After mixing, the mixture will be sprayed into one of the pipes of the cooling tower 63 through the cooling pump 62 and the pipe to achieve the dual functions of rapid cooling and acid removal.

[0029] More specifically, in this embodiment, the sewage tank 61 includes a tank body 611;

[0030] The upper end of the tank 611 has a water inlet 612 for adding tap water. A motor 613 is fixedly installed at the bottom of the tank 611. The shaft of the motor 613 extends into the interior of the tank 611 and is fixed with a pulsator 614. In other words, in this embodiment, the design of the motor 613 and the pulsator 614 is used to achieve sufficient mixing of sewage and tap water inside the tank 611 to ensure sufficient cooling and deacidification in the subsequent process. When using, after adding tap water in a certain proportion, the motor 613 drives the pulsator 614 to rotate, thereby achieving the purpose of thorough mixing.

[0031] Based on the above embodiments, in this embodiment, a scale rod 615 is movably inserted into the upper end of the tank 611, and a float 616 is fixedly installed at the bottom of the scale rod 615. The float 616 is placed inside the tank 611. The purpose of the float 616 in this embodiment is to facilitate the observation of the liquid level when boiler wastewater enters, so as to add tap water according to the liquid volume of boiler wastewater. Preferably, the float 616 in this embodiment can be set as a float ball.

[0032] Furthermore, in this embodiment, the upper end of the float 616 is formed with a sleeve 617, the bottom end of the scale rod 615 is inserted into the inner side of the sleeve 617, and a positioning glass bead 618 is embedded on the outer bottom of the scale rod 615. The outer side of the sleeve 617 is provided with a hole that matches the positioning glass bead 618.

[0033] In this embodiment, the float 616 and the scale rod 615 are designed to be detachable, which allows for easy disassembly of the float 616 and the scale rod 615 during assembly. In addition, the float 616 can be disassembled and removed during subsequent use for cleaning and maintenance of its outer wall.

[0034] Of course, in order to facilitate convenient operation of the inside of the tank 611, the top of the tank 611 in this embodiment is detachably connected to a tank cover 619. The tank cover 619 can be fixed to the top of the tank 611 by bolts. In addition, the water inlet 612 and the scale rod 615 in this embodiment are both set on the tank cover 619. Furthermore, a transparent window 620 is also provided at the front end of the tank 611 in this embodiment. The design of the transparent window 620 allows for the detection of the mixing state of the boiler wastewater and tap water inside, thereby improving the convenience of observation.

[0035] In summary, in this invention, the high-temperature wastewater discharged from the boiler is first introduced into the heater 2 to heat the incoming air in the secondary combustion chamber 1. After heating, the cooled wastewater is then introduced into the heat exchanger 5 to heat the tap water pumped into the boiler. By utilizing the secondary heating of the boiler wastewater, the utilization of thermal energy can be maximized. In addition, this invention also includes a cooling component 6, which can be used to cool and deacidify the discharged boiler wastewater to meet environmental protection requirements.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A boiler blowdown heat utilization system, characterized by, include: The secondary combustion chamber (1), the heater (2) connected to the secondary combustion chamber (1), and the blower (3) installed at the air inlet of the heater (2); The heating pipe (21) of the heater (2) is connected to the boiler sewage pipe (4) at one end and to the heat exchanger (5) at the other end. The output pipe of the heat exchanger (5) is connected to the cooling component (6). The heat exchange pipe (51) of the heat exchanger (5) is connected to the water tank (8) at one end via the water pump (7) and to the boiler at the other end for water supply.

2. The system according to claim 1, wherein: The cooling component (6) includes a wastewater tank (61) connected to the output end of the heat exchanger (5), and one end of the wastewater tank (61) is connected to the cooling tower (63) via a cooling pump (62).

3. The thermal energy utilization system for boiler blowdown according to claim 2, wherein: The sewage tank (61) includes a tank body (611); The upper end of the tank (611) has a water inlet (612), and a motor (613) is fixedly installed at the bottom of the tank (611). The shaft end of the motor (613) passes through the interior of the tank (611) and is fixed with a pulsator (614).

4. The thermal energy utilization system for boiler blowdown according to claim 3, wherein: A scale rod (615) is movably inserted into the upper end of the tank (611), and a float (616) is fixedly installed at the bottom of the scale rod (615). The float (616) is placed inside the tank (611).

5. The system according to claim 4, wherein: The upper end of the float (616) is formed with a sleeve (617), and the bottom end of the scale rod (615) is inserted into the inner side of the sleeve (617). A positioning glass bead (618) is embedded on the outer bottom of the scale rod (615), and a hole adapted to the positioning glass bead (618) is opened on the outer side of the sleeve (617).

6. The thermal energy utilization system for boiler blowdown according to claim 3, wherein: The top of the tank (611) is detachably connected to a tank cover (619), and a transparent window (620) is also provided at the front end of the tank (611).

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