Concentrated sulfuric acid pipeline protection self-powered device with thermoelectric power generation

Abstract

The utility model provides a concentrated sulfuric acid pipeline protection self-powered device with thermoelectric power generation. The device comprises a high-temperature concentrated sulfuric acid pipeline, a cooling water pipeline, a thermoelectric power generation unit, a voltage stabilization unit, a control unit, an energy storage unit, a boost unit, an anode protection controller and an acid cooler. According to the device, corresponding voltage and current can be output through automatic judgment, and the requirement for acid tube protection is met; and meanwhile, the cold and hot ends of the acid water pipe are used for generating power to supply power to the device, heat energy is fully utilized, and the power consumption cost is reduced. And on the basis of ensuring safe operation of equipment, the production requirements are met.

Description

Technical Field

[0001] The utility model relates to a concentrated sulfuric acid pipeline protection self-power supply device with temperature difference power generation, belonging to the field of self-power supply in power networks. Background Art

[0002] In the flue gas acid-making industry, the acid pipes in the drying and absorption process often leak acid. Later, the process was improved to use stainless steel pipes instead of the previous cast iron pipes. In order to reduce the corrosion of sulfuric acid on the stainless steel pipes, an anode protection device was added to the pipeline. Under normal production conditions, the device only needs to provide a very small current and a very low voltage to maintain the passivation film on the inner wall of the acid pipe to reduce the corrosion of sulfuric acid on the pipe wall. When the system is shut down for maintenance or there are abnormal fluctuations, a large current is required to passivate the surface and form a passivation film. Previously, all anode protection systems used electricity from the city. There are many concentrated sulfuric acid pipelines in this area, and the temperature is very high. If this heat energy can be used, it can not only reduce energy consumption, but also save production costs. In view of this, the utility model conducted research on this and specially developed a concentrated sulfuric acid pipeline protection self-powered device with temperature difference power generation, which resulted in this case. Utility Model Content

[0003] The purpose of this utility model patent is to provide a concentrated sulfuric acid pipeline protection self-powered device with temperature difference power generation to provide power for the anode protection controller.

[0004] In order to achieve the above purpose, the solution of the utility model is:

[0005] A self-powered system based on temperature difference power generation comprises a control unit, a voltage stabilizing unit, an energy storage unit, a voltage boosting unit, and a temperature difference power generation unit installed on a concentrated sulfuric acid hot pipeline: wherein the hot end of the temperature difference power generation unit draws energy from the concentrated sulfuric acid pipeline, and the cold end is connected to a cooling water pipeline, and the temperature difference formed at the hot and cold ends converts the thermal energy into electrical energy, and the electrical energy generated by the temperature difference power generation unit is stored in the energy storage unit after passing through the voltage stabilizing unit, and the energy storage unit provides electrical energy for weak current equipment on the one hand, and supplies power to power equipment on the other hand after voltage boosting by the voltage boosting unit.

[0006] Furthermore, the temperature difference power generation unit includes a temperature difference power generation module, a heat collection plate and a radiator, wherein the heat collection plate is connected to the heating pipe to provide a heat source to form the hot end of the temperature difference power generation unit; the radiator is connected to the temperature difference power generation module and fixed on the cooling water pipe to form the cold end of the temperature difference power generation unit.

[0007] Furthermore, the temperature difference power generation unit also includes a circuit board, and the temperature difference power generation module and peripheral electrical components are mounted on the circuit board.

[0008] Furthermore, the temperature difference power generation unit also includes an insulating heat conductive isolation pad, which is arranged between the heat collecting plate and the circuit board to prevent the circuit board from being damaged by direct contact with the heat source.

[0009] Furthermore, the temperature difference power generation module includes a plurality of temperature difference power generation sheets connected in series and a plurality of temperature difference power generation sheets connected in parallel, and generates electricity by utilizing the temperature difference between the heat source of the concentrated sulfuric acid pipeline and the cooling water pipe to meet the power and voltage requirements of the equipment in the anode protection controller.

[0010] Furthermore, the radiator is an aluminum radiator;

[0011] Furthermore, the energy storage unit adopts a supercapacitor group;

[0012] Furthermore, the control unit is controlled by a microprocessor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main control circuit.

[0014] Figure 2 This is a schematic diagram of the structure of the temperature difference power generation module. DETAILED DESCRIPTION

[0015] like Figure 1As shown, a concentrated sulfuric acid pipeline protection self-powered device with temperature difference power generation includes a high-temperature concentrated sulfuric acid pipeline 1, a cooling water pipeline 2, a temperature difference power generation unit 3, a voltage stabilizing unit 4, a control unit 5, an energy storage unit 6, a boost unit 7, an anode protection controller 8 and an acid cooler 9. The entire self-powered system can be packaged together and then installed on the high-temperature concentrated sulfuric acid pipeline 1, or the temperature difference power generation unit 3 can be installed on the high-temperature concentrated sulfuric acid pipeline 1 alone. Regardless of the installation method, the hot end of the temperature difference power generation unit must be close to the high-temperature concentrated sulfuric acid pipeline 1 to obtain energy from the high-temperature concentrated sulfuric acid pipeline 1, and the cold end is fixed on the cooling water pipeline 2 so that the cold end and A large temperature difference is formed at the hot end, and the temperature difference formed at the hot and cold ends converts heat energy into electrical energy. The electrical energy generated by the thermoelectric power generation unit 3 is stored in the energy storage unit 6 after passing through the voltage stabilizing unit 4. The voltage stabilizing unit 4 stabilizes the output voltage of the thermoelectric power generation unit 3 at a value, so that the electrical energy of the thermoelectric power generation unit 3 is injected into the energy storage unit 6 and meets the power supply of the anode protection controller 8 and other equipment. The energy storage unit 6 collects and stores the electrical energy of the thermoelectric power generation unit 3 in real time, and issues instructions to each unit of the system in real time according to the system operation conditions collected by the control unit 5, so as to ensure the safe operation of each unit and meet the charge requirements of the power equipment and the control unit. The energy storage unit 6 adopts a fast-charging supercapacitor, and the control unit 5 adopts a microprocessor control. The equivalent impedance of the thermoelectric power generation unit 3 is matched with the load impedance in real time through the control unit 5, so as to achieve the maximum power output of the thermoelectric power generation unit 3. The utility model provides a concentrated sulfuric acid pipeline protection self-powered device with thermoelectric power generation, which has a compact structure, light weight, modular production, and convenient assembly. It adopts static temperature difference power generation, has high reliability, no mechanical transmission parts, does not generate noise, is energy-saving and environmentally friendly, has a high operating temperature, and can be applied to a variety of high-temperature working environments.

[0016] like Figure 2As shown, the thermoelectric power generation module unit 3 in this embodiment includes a heat collecting plate 31, a thermoelectric power generation module 32 and a radiator 33, wherein the heat collecting plate 31 is connected to the heating pipe to collect heat energy, ensure sufficient heat source, and form the hot end of the thermoelectric power generation unit. The heat collecting plate 31 is generally fixedly installed on the heating pipe 1, and can also provide a fixed support point for other components in the thermoelectric power generation module unit 3; the radiator 33 is connected to the thermoelectric power generation module 32, and is arranged on a side away from the hot end to form the cold end of the thermoelectric power generation unit 3. 3. The heat sink 33 adopts materials with good thermal conductivity, specifically, an aluminum heat sink or a plastic heat sink. The heat sink 33 mainly dissipates the heat transmitted from the hot end to the cold end of the temperature difference power generation module 32 in a timely and effective manner to prevent the temperature of the cold end of the temperature difference power generation module 32 from rising and affecting the optimal output of power and voltage of the temperature difference power generation module 32. The size of the heat sink 33 is related to the power strength of the temperature difference power generation module 32, that is, the larger the rated power of the temperature difference power generation module 32, the larger the size of the heat sink 33. In order to achieve a better heat dissipation effect, the shell of the temperature difference power generation module 32 generally adopts a material with good thermal conductivity.

[0017] The temperature difference power generation module 32 includes m series-connected temperature difference power generation sheets and n parallel-connected temperature difference power generation sheets, and generates electricity by using the temperature difference between hot water and air in the heating pipe to meet the power and voltage requirements of equipment such as electric regulating valves and sensors. The temperature difference power generation module 32 can be made into a cylinder or a square, so that multiple temperature difference power generation sheets can be stably connected together.

[0018] The thermoelectric power generation unit 3 also includes a circuit board 35, on which the thermoelectric power generation module 32 and peripheral electrical components are mounted. The circuit board integrates electrical components such as DC-DC modules, capacitors, and inductors, which can ensure reliable and stable welding between the electrical components, and realize stable and reliable power supply to electric valves, sensors and other equipment. In order to avoid the thermoelectric power generation module 32 and the circuit board 35 directly contacting the heat collecting plate 31 and causing damage, the thermoelectric power generation unit 3 also includes an insulating heat conductive isolation pad 34, which is arranged between the thermoelectric power generation module 32 and the heat collecting plate 31. The insulating heat conductive isolation pad 34 can be made into a square or a circle to ensure that the thermoelectric module 32 is evenly heated.

[0019] The radiator 33 , the temperature difference power generation module 32 , the circuit board 35 , the insulating heat conductive isolation pad 34 and the heat collecting plate 31 are sequentially stacked and fixed on the heating pipe 1 by bolts 36 .

Claims

1. A concentrated sulfuric acid pipeline protection self-powered device with temperature difference power generation, characterized in that: It includes a high-temperature concentrated sulfuric acid pipeline, a cooling water pipeline, a temperature difference power generation unit, a voltage stabilizing unit, a control unit, an energy storage unit, a boost unit, an anode protection controller and an acid cooler; wherein the hot end of the temperature difference power generation unit is fixed on the high-temperature concentrated sulfuric acid pipeline, and the cold end of the temperature difference power generation unit is connected to the cooling water pipeline. The temperature difference formed between the hot and cold ends converts thermal energy into electrical energy, and the electrical energy is stored in the energy storage unit after passing through the voltage stabilizing unit. The energy storage unit provides electrical energy for weak current equipment on the one hand, and supplies power to power equipment after being boosted by the boost unit on the other hand.

2. According to claim 1, the concentrated sulfuric acid pipeline protection self-powered device based on temperature difference power generation is characterized in that: The temperature difference power generation unit includes a temperature difference power generation module and a radiator, wherein the temperature difference power generation unit is connected to a heating pipeline to provide a heat source, forming a hot end of the temperature difference power generation unit; the radiator is connected to the temperature difference power generation module and fixed on a cooling water pipe, forming a cold end of the temperature difference power generation unit.

3. The concentrated sulfuric acid pipeline protection self-powered device based on temperature difference power generation as claimed in claim 2 is characterized in that The temperature difference power generation unit also includes a circuit board, and the temperature difference power generation module and peripheral electrical components are mounted on the circuit board.

4. The concentrated sulfuric acid pipeline protection self-powered device based on temperature difference power generation as claimed in claim 2 is characterized in that The temperature difference power generation unit also includes an insulating heat conductive isolation pad, which is arranged between the temperature difference power generation module and the circuit board.

5. The concentrated sulfuric acid pipeline protection self-powered device based on temperature difference power generation as claimed in claim 2 is characterized in that The temperature difference power generation module includes a plurality of temperature difference power generation sheets connected in series and a plurality of temperature difference power generation sheets connected in parallel.

6. The concentrated sulfuric acid pipeline protection self-powered device based on temperature difference power generation as claimed in claim 2 is characterized in that : The radiator is an aluminum radiator.

7. The concentrated sulfuric acid pipeline protection self-powered device based on temperature difference power generation as claimed in claim 1 is characterized in that :The energy storage unit adopts a supercapacitor group.

8. The concentrated sulfuric acid pipeline protection self-powered device based on temperature difference power generation as claimed in claim 1 is characterized in that : The control unit is controlled by a microprocessor.

Images