阅读说明：本技术 一种用于回转式空气预热器蓄热元件的电刷测温系统 (Electric brush temperature measuring system for heat storage element of rotary air preheater ) 是由 王超 王研凯 李迎春 车得福 孙浩家 高荣泽 王利民 于 2021-06-25 设计创作，主要内容包括：本发明公开了一种用于回转式空气预热器蓄热元件的电刷测温系统,包括测温部件、集电滑环、电刷、接收装置和上位机；测温部件安装在转子内部蓄热元件表面,测量蓄热元件温度；集电滑环布置在空气预热器转子部分顶端靠近转轴的边缘,与转子部分一同旋转；电刷安装在空气预热器转子与壳体之间,与集电滑环接触,收集电信号并传递给接收装置；接收装置布置在空气预热器壳体之外,与电刷连接,收集电刷传导的信号,进行显示并传输至上位机；上位机布置在锅炉机组主控室机房,负责接收传入的温度数据并进行储存,与电厂DCS系统连接并导入所测得温度数据。本发明解决了空气预热器运行过程中转子内部温度难以测量的问题,保障了锅炉机组的正常运行。(The invention discloses an electric brush temperature measurement system for a heat storage element of a rotary air preheater, which comprises a temperature measurement part, a current collection slip ring, an electric brush, a receiving device and an upper computer, wherein the upper computer is connected with the temperature measurement part; the temperature measuring component is arranged on the surface of the heat storage element in the rotor and is used for measuring the temperature of the heat storage element; the collector slip ring is arranged at the edge of the top end of the rotor part of the air preheater, which is close to the rotating shaft, and rotates together with the rotor part; the electric brush is arranged between the rotor and the shell of the air preheater, is in contact with the current collection slip ring, collects an electric signal and transmits the electric signal to the receiving device; the receiving device is arranged outside the air preheater shell and connected with the electric brush, and is used for collecting signals transmitted by the electric brush, displaying the signals and transmitting the signals to an upper computer; the upper computer is arranged in a machine room of a main control room of the boiler unit and is responsible for receiving and storing the transmitted temperature data, and the upper computer is connected with a DCS (distributed control System) of the power plant and imports the measured temperature data. The invention solves the problem that the temperature in the rotor is difficult to measure in the operation process of the air preheater, and ensures the normal operation of the boiler unit.)

1. A temperature measuring system of an electric brush for a heat storage element of a rotary air preheater is characterized by comprising a temperature measuring part, a current collecting slip ring, an electric brush, a receiving device and an upper computer;

the temperature measuring component is arranged on the surface of the heat storage element in the rotor and directly measures the temperature of the heat storage element;

the collector slip ring is arranged at the edge of the top end of the rotor part of the air preheater, which is close to the rotating shaft, and rotates together with the rotor part;

the electric brush is arranged between the rotor and the shell of the air preheater, is in contact with the current collection slip ring, collects an electric signal and transmits the electric signal to the receiving device;

the receiving device is arranged outside the air preheater shell and connected with the electric brush, and is used for collecting signals transmitted by the electric brush, displaying the signals and transmitting the signals to an upper computer;

the upper computer is arranged in a machine room of a main control room of the boiler unit and is responsible for receiving and storing the transmitted temperature data, is connected with a power plant DCS (distributed control system) system, imports the measured temperature data, and displays the temperature data in real time and provides the temperature data for monitoring the running condition of the air preheater.

2. The brush thermometry system according to claim 1, wherein the thermometry component is connected to the slip ring via a wire, the wire is led out from the thermometry component, clings to the inner wall of the rotor and is connected to the slip ring at the upper end, and the wire rotates together with the thermometry component and the slip ring.

3. The brush thermometry system according to claim 1, wherein the thermometry component is a Pt100 type thermal resistor or a K type thermocouple.

4. The brush thermometry system according to claim 1, wherein the brush is a resilient brush and is connected to the air preheater housing by a bracket.

5. The brush thermometry system according to claim 1, wherein the receiving device comprises a processor and a display, the processor being configured to process and transmit the plurality of temperature signals to an upper computer.

6. The brush thermometry system according to claim 5, wherein the display is an LED display screen.

7. The brush temperature measurement system for the rotary air preheater heat storage element as recited in claim 5, wherein the processor uses a STM32F7 series single chip microcomputer.

8. The brush temperature measurement system for a rotary air preheater heat storage element of claim 1, wherein the receiver and the host computer are connected by a power plant boiler unit default line.

Technical Field

The invention belongs to the field of temperature measurement of rotary air preheaters, and particularly relates to an electric brush temperature measurement system for a heat storage element of a rotary air preheater.

Background

In order to reduce the heat loss of exhaust smoke, improve the overall heat efficiency of a boiler unit, improve the temperature of air entering a boiler, improve the combustion condition, enhance the utilization of waste heat of the boiler and improve the operation economy of the unit, the air preheater is arranged in a tail flue of a large boiler unit in China.

In order to enhance heat exchange and improve the air flow rate into the boiler, a rotary air preheater is often adopted in large-scale boiler units. The rotary air preheater transfers heat in a regenerative manner, and flue gas and air alternately flow through the heat storage element. When the flue gas flows through, the heat is transferred from the flue gas to the heat storage element, the temperature of the heat storage element is raised, and the heat storage amount is accumulated; when the air flows through again, the heat storage element gives off the accumulated heat to the air.

Therefore, the method for acquiring the temperature data and the operation condition of the air preheater accurately in time has very important significance for guaranteeing the normal operation of the boiler unit. The temperature of the heat storage element of the air preheater is very important in calculating the heat exchange quantity of the air preheater, monitoring the dust deposition condition of the air preheater and mastering the operation condition of the air preheater. However, in the existing power plant DCS system, only the temperature of the inlet and outlet of the air preheater is measured, and the heat storage element of the air preheater continuously rotates along with the rotor, so that the temperature of the heat storage element inside the air preheater cannot be accurately and timely obtained by the conventional method, and therefore a method for measuring the temperature of the heat storage element inside the rotor of the rotary air preheater is urgently needed.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a brush temperature measuring system for a heat storage element of a rotary air preheater.

The invention is realized by adopting the following technical scheme:

a brush temperature measurement system for a heat storage element of a rotary air preheater comprises a temperature measurement part, a current collection slip ring, a brush, a receiving device and an upper computer;

the temperature measuring component is arranged on the surface of the heat storage element in the rotor and directly measures the temperature of the heat storage element;

the collector slip ring is arranged at the edge of the top end of the rotor part of the air preheater, which is close to the rotating shaft, and rotates together with the rotor part;

the electric brush is arranged between the rotor and the shell of the air preheater, is in contact with the current collection slip ring, collects an electric signal and transmits the electric signal to the receiving device;

the receiving device is arranged outside the air preheater shell and connected with the electric brush, and is used for collecting signals transmitted by the electric brush, displaying the signals and transmitting the signals to an upper computer;

the upper computer is arranged in a machine room of a main control room of the boiler unit and is responsible for receiving and storing the transmitted temperature data, is connected with a power plant DCS (distributed control system) system, imports the measured temperature data, and displays the temperature data in real time and provides the temperature data for monitoring the running condition of the air preheater.

The invention is further improved in that the temperature measuring component is connected with the current collecting slip ring through a lead, the lead is led out of the temperature measuring component, clings to the inner wall of the rotor and is connected with the current collecting slip ring at the upper end, and the lead rotates together with the temperature measuring component and the current collecting slip ring.

The invention is further improved in that the temperature measuring part uses a Pt100 type thermal resistor or a K type thermocouple.

A further improvement of the present invention is that the brushes are resilient brushes and are connected to the air preheater housing by a bracket.

The invention is further improved in that the receiving device comprises a processor and a display, and the processor is used for processing a plurality of groups of temperature signals and transmitting the temperature signals to the upper computer.

The invention is further improved in that the display adopts an LED display screen.

The invention is further improved in that the processor adopts STM32F7 series single-chip microcomputer.

The invention is further improved in that the receiving device and the upper computer are connected through a preset line of the power plant boiler unit.

The invention has at least the following beneficial technical effects:

(1) the temperature measuring component is directly contacted with the heat storage element, so that the measured data is more accurate.

(2) The problem that temperature measurement is difficult to achieve inside the rotating part is solved, and the temperature measuring device can be used in the field of temperature measurement of heat storage elements inside a rotor of the rotary air preheater and can also be used in industrial equipment with the rotating part such as a motor.

(3) The problem that temperature data cannot be obtained in real time in the traditional method is solved, the temperature of the specified heat storage element can be measured in real time, and more effective reference is provided for monitoring the running condition of the air preheater in real time.

(4) By adopting the collector slip ring design, temperature data of a plurality of groups of heat storage elements can be obtained.

(5) Receiving arrangement and host computer pass through the power plant and predetermine the line connection and transmit temperature data, need not to add equipment in addition, reduce cost.

(6) The upper computer stores data and is connected with a DCS (distributed control system) of the power plant, so that the operation condition of the air preheater can be conveniently mastered in real time and other calculations can be carried out.

In conclusion, the temperature measuring device is used for measuring the temperature of the heat storage element in the rotor of the rotary air preheater, the problem that the temperature in the rotor is difficult to measure in the operation process of the air preheater is solved, and the normal operation of a boiler unit is guaranteed.

Drawings

FIG. 1 is a schematic view of the system of the present invention.

FIG. 2 is a schematic diagram of the top view of the rotary air preheater, i.e. the arrangement of the slip ring.

FIG. 3 is a vertical cross-sectional view of the rotary air preheater of the present invention, showing the connection between the temperature measurement component and the slip ring.

The reference numbers in the figures: 1 is a rotor part of a rotary air preheater; 2 is a rotating shaft; 3 is a collector slip ring; 4 is an electric brush; 5 is a temperature measuring component; and 6 is a conducting wire.

Detailed Description

The invention is further illustrated and explained below with reference to the drawings in which:

as shown in figure 1, the brush temperature measurement system for the heat storage element of the rotary air preheater provided by the invention is characterized by comprising a temperature measurement part 5, a collector slip ring 3, a brush 4, a receiving device and an upper computer.

The temperature measuring component 5 is arranged on the surface of a heat storage element in the rotor, directly measures the temperature of the heat storage element, clings to the inner wall of the rotor through a lead and transmits the temperature to the collector slip ring 3; the collector slip ring 3 is arranged at the edge of the top of the rotor part 1 of the rotary air preheater, receives signals of the temperature measuring part 5 and is connected with the electric brush 4; the electric brush 4 is arranged between the rotor and the shell of the air preheater, is contacted with the collector slip ring 3, collects an electric signal and transmits the electric signal to the receiving device; the receiving device is arranged outside the air preheater shell and connected with the electric brush 4, and is used for collecting signals transmitted by the electric brush 4, displaying the signals and transmitting the signals to an upper computer; the upper computer is arranged in a machine room of a main control room of the boiler unit and is responsible for receiving and storing the transmitted temperature data, is connected with a DCS (distributed control System) of the power plant, imports the measured temperature data, displays the temperature data in real time and provides the temperature data for monitoring the running condition of the air preheater and other calculations.

As shown in FIG. 2, the collector slip ring 3 is arranged on the top of the rotor part 1 of the rotary air preheater near the edge of the rotating shaft 2, and rotates with the air preheater rotor together with the temperature measuring part 5 and the wires between the two.

As shown in fig. 3, the temperature measuring member 5 is connected to the collector slip ring 3 via a lead wire 6, and the lead wire is led out from the temperature measuring member 5, and is connected to the collector slip ring 3 at the upper end while being in close contact with the inner wall of the rotor.

Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.