CN-122015289-A - Jiwa-level electrode heating device and method for heating large-capacity heat storage water body

Abstract

The application provides a Jiwa-scale electrode heating device and a Jiwa-scale electrode heating method for heating a large-capacity heat storage water body, wherein the Jiwa-scale electrode heating device comprises three metal electrode cylinders which are respectively and correspondingly connected with A, B, C phases of three-phase alternating current and are used for receiving external circulating water, three metal center cylinders which are respectively and correspondingly arranged with the three metal electrode cylinders, insulating coatings are coated on the outer walls of the metal center cylinders and are respectively connected with the corresponding phases of the three-phase alternating current, and upper electrode groups which are connected between the metal center cylinders and the metal electrode cylinders and are formed by a plurality of upper electrode pipes and flanging tetrafluoro electrode connecting assemblies are used for realizing insulating isolation and water flow on-off control between the metal center cylinders and the metal electrode cylinders. The application solves the problems that in a super-large scale water heat storage system in the fields of regional heating, centralized heating in a large industrial park, cross-season heat storage and the like, electric heating power above a level of gigawatt is generally required, and as many as hundreds of devices are required to be connected in parallel by conventional electric heating equipment, the system is complex, the cost is high and the requirement cannot be met.

Inventors

• Sun tianjin
• LI XING
• SHI LIPING
• HU RUI
• ZHANG QI
• HUANG XINSHENG
• Hui Senquan
• LIU XINGZHAO

Assignees

• 杭州华源前线能源设备有限公司

Dates

Publication Date

20260512

Application Date

20260203

Claims (8)

1. 1. Jiwa-level electrode heating device for heating large-capacity heat storage water body, which is characterized by comprising: three metal electrode cylinders (3) are respectively connected with A, B, C phases of three-phase alternating current correspondingly and are used for receiving external circulating water; The three metal center cylinders (1) are respectively arranged corresponding to the three metal center cylinders (1), the outer walls of the metal electrode cylinders are coated with insulating coatings, and corresponding phases of three-phase alternating current are respectively connected; The upper electrode group is connected between the metal central cylinder (1) and the metal electrode cylinder (3) and consists of a plurality of upper electrode pipes (6) and flanging tetrafluoro electrode connecting assemblies (7) and is used for realizing insulation isolation and water flow on-off control between the metal central cylinder (1) and the metal electrode cylinder (3); The lower electrode group is arranged at the lower part of the metal electrode cylinder (3) and consists of a plurality of lower electrode pipes (10) for carrying out secondary heating on water flow; The bearing device (12) is arranged below the lower electrode group and is used for collecting the heated water flow and guiding the heated water flow back to the heat storage water body; wherein, metal center section of thick bamboo (1) is full liquid operation, and metal electrode section of thick bamboo (3) is not full liquid operation, is equipped with floater device (8) in upper segment electrode pipe (6), through setting for pressure control rivers break-make.
2. 2. The Jiwa-scale electrode heating device for heating a large-capacity heat-storage water body as claimed in claim 1, wherein each upper electrode tube (6) in said upper electrode group is provided with a floating ball device (8) for automatically opening a water flow channel when a set pressure is reached.
3. 3. The Jiwa-scale electrode heating device for heating a large-capacity heat-storage water body as claimed in claim 1, wherein a rectifying device (11) is arranged at the joint of a lower electrode tube (10) and a metal electrode cylinder (3) in the lower electrode group for improving the distribution of downfall flow fields.
4. 4. The Jiwa-scale electrode heating device for heating a large-capacity heat-storage water body as claimed in claim 1, wherein the metal central cylinder (1) and the metal electrode cylinder (3) are of large-size cylindrical structures, and are suitable for being connected into a large-sized water storage container as a component part of a heating system.
5. 5. The Jiwa-level electrode heating device for heating a large-capacity heat-storage water body as claimed in claim 1, wherein the whole power of the device can reach Jiwa level, and the device is suitable for regional heating, industrial park heating, cross-season heat storage or new energy consumption scenes.
6. 6. A gigawatt-level electrode heating method for heating a large-capacity heat storage water body, characterized by adopting the device as claimed in any one of claims 1-5, comprising the steps of pumping water in the heat storage water body to three metal central cylinders (1) through an external circulating pump; When the pressure in the metal central cylinder reaches a set value, a floating ball device (8) in the upper electrode tube (6) is opened, and water flow falls to the metal electrode cylinder (3); The water flow is conducted with the electrode in the metal electrode cylinder (3) to realize the first heating; the water flow continuously falls and is heated for the second time through the electrode group at the lower section; the heated water flows through the receiving device (12) to be collected and flows back to the heat storage water body to form closed circulation.
7. 7. The gigawatt-level electrode heating method for heating a large-capacity heat storage water body according to claim 6, wherein the residence time and the heating power of the water flow in the metal central cylinder (1) and the metal electrode cylinder (3) can be controlled by adjusting the flow rate of the circulating pump and the electrode voltage.
8. 8. The method for heating a large volume of hot water storage of the gigawatt level electrode of claim 6, wherein the method is suitable for large scale thermal energy storage and release of lakes, ponds or artificial hot water storage.

Description

Jiwa-level electrode heating device and method for heating large-capacity heat storage water body Technical Field The invention relates to the technical field of electric heating and thermal energy storage, in particular to a Giwa-scale electrode heating device and a Giwa-scale electrode heating method for heating a large-capacity heat storage water body. Background In the global background of coping with climate change and energy transformation, renewable energy installation capacity represented by wind power and photovoltaic is rapidly increased. By 2025 and 6 months, the total installed capacity of wind power and photovoltaic in China is more than 16 hundred million kilowatts, and the wind power and photovoltaic combined installation capacity becomes a first large power supply. However, the inherent intermittent, fluctuating and anti-peak shaving characteristics of renewable energy sources pose serious challenges to the real-time balance and stable operation of power systems. The traditional thermal power generating unit has limited adjustment flexibility, and is difficult to completely adapt to severe load fluctuation caused by high-proportion renewable energy source access to a power grid. Therefore, the development of energy storage technology with large scale, long time and low cost is a key for realizing the efficient absorption of renewable energy sources and improving the toughness of an electric power system. In terminal energy consumption, the heat energy consumption ratio exceeds 50%, so that the heat storage technology becomes one of the promising large-scale energy storage directions. The sensible heat storage technology using water as a heat storage medium has the remarkable advantages of high energy storage density, extremely low medium cost, simple system, long service life, environmental friendliness, capability of meeting the short-term (daily/weekly) peak shaving, long-term (seasonal) energy storage requirements and the like. In particular, the unit energy cost of heat storage can be reduced to one tenth or even lower than the electricity storage cost, and the economic advantage is outstanding. At present, a large-scale heat storage system taking water as a medium mainly depends on electric heating in a core heating technology. The main stream equipment in the market is an electric heating tube boiler and an electrode boiler. The electric heating tube boiler heats the metal resistance wire through current, and then transfers heat to water through the insulating layer and the tube wall, and the single machine power is usually smaller and is generally not more than 5 MW. The electrode boiler utilizes the conductivity of water, current directly flows through the heated water body, so that the direct and efficient conversion from electric energy to heat energy is realized, the single machine power can reach 30-50 MW, and the electrode boiler is more applied to medium and small-scale heat storage projects. However, for very large scale applications such as district heating, centralized energy supply in large industrial parks, and seasonal heat storage at hundred megawatts to gigawatts, instantaneous heating power is often required up to several hundred megawatts or even gigawatts. If the existing electrode boiler technology is adopted, tens or even hundreds of devices need to be integrated in a complex parallel connection. The large-scale commercial popularization of the high-capacity water heat storage technology is severely restricted by the large-occupied area of the system, the extremely complicated pipeline valve and control system, the high disposable investment and operation and maintenance cost, more fault points, the overall reliability and the safety of the system are reduced, and therefore, the large-scale commercial popularization of the high-capacity water heat storage technology is improved, and the Jiwa-scale electrode heating device and the Jiwa-scale electrode heating method for heating the high-capacity heat storage water are provided. Disclosure of Invention The invention aims to overcome the technical bottleneck that the single machine power of the existing electrode boiler is limited and the heating requirement of the ultra-large scale heat storage system in the Giwatt level cannot be directly met. In order to achieve the above object, the present invention provides the following technical solutions: a Giwa-scale electrode heating device and a method for heating a large-capacity heat storage water body are provided, so that the problems are improved. The application is specifically as follows: a gizzard-scale electrode heating device for heating a mass body of hot water comprising: the three metal electrode cylinders are respectively connected with A, B, C phases of three-phase alternating current correspondingly and are used for receiving external circulating water; The three metal center cylinders are respectively and correspondingly arranged with the three metal elect