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On-line monitor of incomplete combusting loss of machines

A technology of complete combustion and monitoring instrument, which is used in fuel testing, instruments, analysis materials, etc., can solve the problems of no way to measure, the volume of the resonant cavity is large, and the loss of incomplete combustion cannot be measured online, so as to improve the measurement accuracy, The effect of similar bulk density and uniform particle size

Inactive Publication Date: 2011-11-16
SHANGHAI HEAT ENERGY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main feature of this patent is the use of a microwave signal source with a signal frequency of 0.3-1.5GHz. Although the low-frequency microwave signal can reduce the influence of other minerals in the fly ash on the signal, it has caused the problem of excessive volume of the resonant cavity.
In addition, the fly ash carbon meter proposed in this patent is the same as the US patent US5109201, US5173662 and Chinese patent CN 87207683U, which can only measure the carbon content of fly ash. There is no way to measure the carbon content of slag, another important component of mechanical incomplete combustion loss. Measurement
[0005] In short, the currently widely used fly ash carbon detectors can only measure the carbon content of fly ash, and cannot perform online measurement of mechanical incomplete combustion loss, which reflects one of the important indicators of boiler combustion efficiency.

Method used

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  • On-line monitor of incomplete combusting loss of machines
  • On-line monitor of incomplete combusting loss of machines
  • On-line monitor of incomplete combusting loss of machines

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specific Embodiment approach 1

[0020] Such as figure 1 As shown, the present embodiment includes: sampler 1, grinding device 2, ash sample tube 3, measuring cavity 4 and main frame 5, wherein: sampler 1 is installed in tail flue 6, sampler 1 and grinding device 2 are connected, and grinding The device 2 is connected to the ash sample pipe 3, and the fly ash 7 extracted from the tail flue 6 is processed by the grinding device 2 and sent to the ash sample pipe 3 for measurement. The microwave signal of the measurement cavity 4 comes from the signal source 8, and the measured signal is transmitted to the host computer 5. By communicating with the DCS system 9, relevant information is obtained, and the measured fly ash carbon content signal is calibrated to obtain the fly ash content. Carbon content, and calculate the corresponding mechanical incomplete combustion loss.

[0021] In this embodiment, the grinding device added between the sampler 1 and the ash sample tube 3 can grind different small fly ash parti...

specific Embodiment approach 2

[0022] Such as figure 1 As shown, the present embodiment comprises: spiral sampler 10, grinding device 2, ash sample tube 3, measuring cavity 4 and main frame 5, wherein: sampler 10 is installed in ash hopper 11, sampler 10 is connected with grinding device 2, The grinding device 2 is connected to the ash sample pipe 3, and the ash 12 extracted from the ash hopper 11 is processed by the grinding device 2 and sent to the ash sample pipe 3 for measurement. The microwave signal of the measurement chamber 4 comes from a signal source 8 , and the measured signal is transmitted to the host computer 5 . By communicating with the DCS system 9, relevant information is obtained, and the measured carbon content signal of the ash is calibrated to obtain the carbon content of the ash, and the corresponding mechanical incomplete combustion loss is calculated.

[0023] This embodiment changes the current situation that the carbon content of the ash can only be measured by off-line sampling,...

specific Embodiment approach 3

[0024] Such as figure 1 As shown, this embodiment includes: a sampler 1 , a grinding device 2 , an ash sample tube 3 , a measuring chamber 4 , and a host 5 . Among them, the sampler 1 adopts an unpowered self-sampling device, including a sampling gun 101, an ejector gun 102 and a cyclone separator 103. At the boiler tail flue 6, the negative pressure is relatively large, and the ejector gun with the flared mouth carrying the incoming flow is adopted. 102 can generate a large negative pressure, so that the cyclone separator 103 is in a negative pressure state. Under the action of negative pressure, the sampling gun extracts the fly ash 7 in the tail flue 6, and separates it into the grinding device 2. Wrapped in the cyclone The heating belt 104 outside the device 103 can keep the temperature of the device above 150° C., away from the dew point, and ensure that the fly ash obtained by sampling is in a dry state.

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Abstract

The invention relates to an on-line monitor of incomplete combusting loss of machines, which comprises a multistage sampler, a microwave carbon determination module and a multi-combination calculating module, wherein, the multistage sampler is connected with the microwave carbon determination module through an ash sample tube, the microwave carbon determination module is connected with the multi-combination calculating module through communication. According to the invention, the on-line monitoring of carbon-containing fly ash and carbon-containing ash can be realized, the incomplete combusting loss of machines can be calculated through a multi-combination method, so that the invention fills the blank of on-line monitoring of carbon-containing ash and incomplete combusting loss of machines, and provides a real time guidance for combustion of a furnace as well as raises the efficiency of combustion of the furnace.

Description

technical field [0001] The invention relates to a monitoring device in the technical field of boilers, in particular to an online monitor for mechanical incomplete combustion loss. Background technique [0002] As the main force of my country's energy supply, coal accounts for nearly 70% of the total energy consumption. Its main utilization methods include power generation by coal-fired boilers in power stations and utilization of various industrial boilers. Therefore, how to improve the utilization efficiency of coal is of great significance to energy saving and emission reduction. In the calculation of coal-fired boiler efficiency, boiler losses are composed of smoke exhaust loss, mechanical incomplete combustion loss, ash physical loss, chemical incomplete combustion loss and heat dissipation loss, among which mechanical incomplete combustion loss is one of the main losses. It is difficult to obtain in real-time calculation. [0003] Mechanical incomplete loss includes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22G01N35/10
Inventor 李友谊孙长江宋资勤林正春范卫东
Owner SHANGHAI HEAT ENERGY TECH
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