Simple and rapid flue gas cooling and dust removal pretreatment device and method

A pretreatment device and rapid cooling technology, applied in the field of advanced devices, can solve the problems of complex structure, inconvenient transportation, bulky and other problems, and achieve good pre-dust removal effect, fast installation and connection, and large contact area

Inactive Publication Date: 2018-12-28
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these devices are generally complex in structure, relatively large, and inconvenient to install and transport.
In disaster relief sites and site restoration sites, since the processing site is constantly changing, the site conditions may be limited by the site area, transportation conditions and other conditions, and a simple flue gas cooling device that can be easily installed and transported is required.
However, some current invention patents that have been disclosed, such as CN103432887A, etc. do not involve equipment such as flue gas cooling; or as described in CN108246093A, its flue gas cooling system is relatively complicated and huge, and is not suitable for waste incineration smoke in occasions such as emergency relief or site restoration. Gas treatment

Method used

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  • Simple and rapid flue gas cooling and dust removal pretreatment device and method
  • Simple and rapid flue gas cooling and dust removal pretreatment device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as Figure 1~2 As shown, a simple flue gas rapid cooling and dust removal pretreatment device includes a flue gas inlet pipe 1, a nozzle 2, a spiral flue 3, ash discharge pipe fittings 4, ash removal valve 5 and a flue gas discharge pipe 6, the described The flue gas inlet pipe 1 is connected to the spiral flue 3, and a nozzle 2 is arranged on the flue gas inlet pipe 1. The outlet of the spiral flue 3 is connected to the ash discharge pipe 4 and the flue gas discharge pipe 6 respectively. The ash removal valve 5 is arranged on the ash discharge pipe fitting 4.

[0029] The present invention utilizes a pilot-scale flue gas purification device in a laboratory for experimental research. There is a rotary kiln to roast domestic garbage to provide waste incineration flue gas, and the flue gas volume is 300Nm 3 / h. A flue gas inlet pipe 1 with a diameter of 100mm is connected to the outlet of the rotary kiln, and the flue gas velocity is about 10.6m / s. A stainless st...

Embodiment 2

[0033] This example utilizes the device installed in example 1 to carry out the experiment. Incinerate domestic garbage and coal-fired mixed samples in a rotary furnace, the temperature of the flue gas at the outlet of the rotary kiln is 900 ° C, the flow velocity of the flue gas in the flue gas inlet pipe 1 is 10 m / s; the dust concentration is 3.0 g / Nm 3 Spray cooling water at a temperature of 20°C into the spiral flue through the nozzle at a rate of 1.5L / min. The number of spiral turns of the spiral flue is within 5, and the angle between the inclination angle of the spiral flue and the horizontal plane is 30 degrees; The flue gas temperature measured at the detection port of the spiral flue riser is 350°C, and the dust concentration is 1.0g / Nm 3 . The results show that after the cooling water cooling and spiral tube dust removal, the flue gas temperature is reduced by 550°C, and the dust removal efficiency is about 66.7%.

Embodiment 3

[0035] This example utilizes the device installed in example 1 to carry out the experiment. Incinerate domestic waste and coal-fired mixed samples in a rotary furnace, the temperature of the flue gas at the outlet of the rotary kiln is 900°C, the flow velocity of the flue gas in the flue gas inlet pipe (1) is 15m / s; the dust concentration is 3.0g / Nm 3 Spray cooling water at a temperature of 20°C into the spiral flue through the nozzle at a rate of 2.0L / min. The number of spiral turns of the spiral flue is within 20, and the angle between the inclination angle of the spiral flue and the horizontal plane is 5 degrees; The flue gas temperature measured at the detection port of the spiral flue riser is 180°C, and the dust concentration is 0.8g / Nm 3 . The results show that after the cooling water cooling and spiral tube dust removal, the flue gas temperature is reduced by 720°C, and the dust removal efficiency is about 73.3%.

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Abstract

The invention relates to a simple and rapid flue gas cooling and dust removal pretreatment device. The device comprises a flue gas inlet pipe (1), a nozzle (2), a spiral flue (3), an ash discharging pipe fitting (4), an ash clearing valve (5) and a flue gas discharging pipe (6), wherein the flue gas inlet pipe (1) is connected with the spiral flue (3), the nozzle (2) is arranged on the flue gas inlet pipe (1), an outlet of the spiral flue (3) is connected with the ash discharging pipe fitting (4) and the flue gas discharging pipe (6), and the ash clearing valve (5) is arranged on the ash discharging pipe fitting (4). Compared with the prior art, the device is applicable to flue gas purification treatment on occasions where scene conditions are limited, equipment is required to be dismounted and transported, emergency treatment is required and the like.

Description

technical field [0001] The invention belongs to the flue gas rapid cooling and dust removal technology in the field of environmental protection. In particular, it involves the use of spraying cooling water into the flue to quickly cool the flue gas, and then utilizes the dual effects of centrifugal force and gravity on the flue gas passing through the spiral descending flue to initially separate the dust from the flue gas, and finally discharge it through the ash hopper. A device for rapid cooling of flue gas and pre-dust removal. Background technique [0002] Incineration technology has become one of the main technologies for waste disposal in my country. In the process of disaster relief such as earthquakes and floods, it is often necessary to use incineration to sterilize, harmlessly and reduce the amount of domestic and medical waste at the disaster site. At the same time, in the process of industrial site restoration, heat treatment is often used to treat the soil of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/00B01D45/16B01D45/02
CPCB01D45/02B01D45/16B01D53/00B01D2258/0283
Inventor 瞿赞晏乃强邓梅周永贤黄文君陈纪赛
Owner SHANGHAI JIAO TONG UNIV
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