阅读说明：本技术 一种烟气余热回收装置的压力检测系统 (Pressure detection system of flue gas waste heat recovery device ) 是由 郑琪 于 2021-09-07 设计创作，主要内容包括：本发明涉及一种烟气余热回收装置的压力检测系统,包括加热炉、余热锅炉及烟道,在所述烟道中部设有烟囱,还包括风压检测调整装置,所述烟囱前、后两端分别设有第一引风机及第二引风机,所述风压检测调整装置包括串连的控制器、压力变换器、变频器及压力检测头。通过压力检测头实时检测烟道内的烟气压力,并将数据传输给压力变换器,并由控制器驱动变频器实现引风机运行状态的调整,最终实现烟道的压力保持在合理范围内,杜绝由烟气余热回收装置的运行影响到加热炉正常运行的现象产生,保证设备的持续平稳的运行。(The invention relates to a pressure detection system of a flue gas waste heat recovery device, which comprises a heating furnace, a waste heat boiler, a flue, a chimney and a wind pressure detection and adjustment device, wherein the middle part of the flue is provided with the chimney, the front end and the rear end of the chimney are respectively provided with a first induced draft fan and a second induced draft fan, and the wind pressure detection and adjustment device comprises a controller, a pressure transducer, a frequency converter and a pressure detection head which are connected in series. The flue gas pressure in the flue is detected in real time through the pressure detection head, data are transmitted to the pressure converter, the controller drives the frequency converter to adjust the running state of the draught fan, the pressure of the flue is kept in a reasonable range finally, the phenomenon that the normal running of the heating furnace is influenced by the running of the flue gas waste heat recovery device is avoided, and the continuous and stable running of equipment is ensured.)

1. A pressure detection system of a flue gas waste heat recovery device comprises a heating furnace, a waste heat boiler and a flue, wherein a chimney is arranged in the middle of the flue, it is characterized by also comprising a wind pressure detection and adjustment device, wherein the front end and the rear end of the chimney are respectively provided with a first induced draft fan and a second induced draft fan, the wind pressure detecting and adjusting device comprises a controller, a pressure transducer, a frequency converter and a pressure detecting head which are connected in series, wherein the input end of the frequency converter is connected with the controller, the output end of the pressure transducer is connected with a second induced draft fan, the pressure transducer is connected with a pressure detection head through a pressure guiding pipe, the pressure detection head is arranged between the first induced draft fan and a chimney, the flue between the chimney and the first draught fan is provided with a butterfly valve, the flue between the chimney and the second draught fan is provided with a butterfly valve, and a channel leading the chimney to the waste heat boiler is provided with a butterfly valve.

Technical Field

The invention relates to a flue gas waste heat recovery system, in particular to a pressure detection system of a flue gas waste heat recovery device.

Background

Waste heat boilers, as the name implies, refer to boilers that heat water to a certain temperature using waste heat in waste gas, waste material or waste liquid and heat generated by burning combustible materials thereof in various industrial processes. The oil-fired boiler, the gas-fired boiler and the coal-fired boiler with the smoke box and the smoke flue waste heat recovery function are also called waste heat boilers, and the waste heat boilers can produce hot water or steam through waste heat recovery to be supplied to other sections for use.

The main idea of waste heat boiler flue gas waste heat utilization is to reduce the temperature of flue gas through heat exchange, heat in the flue gas is utilized to heat other media, and the heated media are used as heat sources in different occasions. In the waste heat boiler flue gas waste heat utilization system, a draught fan is adopted to suck out part of high-temperature flue gas for utilization. In order to ensure that the normal operation of the heating furnace is not influenced during the operation of the flue gas recovery device, the working state of the induced draft fan needs to be regulated and controlled.

Disclosure of Invention

In view of the current situation of the prior art, the technical problem to be solved by the present invention is to provide a pressure detection system of a flue gas waste heat recovery device, which monitors a flue in real time and adjusts the power of an induced draft fan.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a flue gas waste heat recovery device's pressure measurement system, includes heating furnace, exhaust-heat boiler and flue the flue middle part is equipped with the chimney, still includes wind pressure detection adjusting device, before the chimney, the back both ends are equipped with first draught fan and second draught fan respectively, wind pressure detection adjusting device includes controller, pressure transducer, converter and the pressure detection head of polyphone, the input connection director of converter, its output connect the second draught fan, pressure transducer links to each other with the pressure detection head through the pressure tube, the pressure detection head is arranged in between first draught fan and the chimney be equipped with the butterfly valve on the flue between chimney and the first draught fan be equipped with the butterfly valve on the flue between chimney and the second draught fan the chimney leads to being equipped with the butterfly valve on exhaust-heat boiler's the passageway.

Compared with the prior art, the invention has the advantages that: according to the invention, the pressure of the flue gas in the flue is detected in real time through the pressure detection head, the data is transmitted to the pressure converter, the frequency converter is driven by the controller to realize the adjustment of the operation state of the induced draft fan, the pressure of the flue is finally kept in a reasonable range, and the phenomenon that the normal operation of the heating furnace is influenced by the operation of the flue gas waste heat recovery device is avoided. The continuous and stable operation of the equipment is ensured. The invention has reasonable design and is suitable for large-scale popularization.

Drawings

Fig. 1 is a schematic diagram of a structure and a flow of a pressure detection system of a flue gas waste heat recovery device according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in figure 1, a pressure detection system of a flue gas waste heat recovery device, including heating furnace 10, exhaust-heat boiler 20 and flue 11 middle part of flue 11 is equipped with chimney 13, still includes the wind pressure and detects adjusting device, chimney 13 front and back both ends are equipped with first draught fan 14 and second draught fan 70 respectively, the wind pressure detects adjusting device and includes converter 60, controller 50, pressure transducer 40 and pressure detection head 30 of polyphone, the input connection director 50 of converter 60, second draught fan 70 is connected to its output, pressure transducer 40 passes through the induced pressure pipe 31 and links to each other with pressure detection head 30, pressure detection head 30 arranges in between first draught fan 14 and chimney 13 be equipped with butterfly valve 12 on flue 11 between chimney 13 and first draught fan 14 be equipped with butterfly valve 12 on flue 11 between chimney 13 and the second draught fan 70, a butterfly valve 12 is arranged on the channel 11 of the chimney 13 leading to the waste heat boiler 20.

Compared with the prior art, the invention has the advantages that: according to the invention, the pressure of the flue gas in the flue is detected in real time through the pressure detection head, the data is transmitted to the pressure converter, the frequency converter is driven by the controller to realize the adjustment of the operation state of the induced draft fan, the pressure of the flue is finally kept in a reasonable range, and the phenomenon that the normal operation of the heating furnace is influenced by the operation of the flue gas waste heat recovery device is avoided. The continuous and stable operation of the equipment is ensured. The invention has reasonable design and is suitable for large-scale popularization.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.