CN212594914U

CN212594914U - Waste liquid incinerator tail gas CO, NOx integration desorption device

Info

Publication number: CN212594914U
Application number: CN202020998747.1U
Authority: CN
Inventors: 游在鑫; 王建明; 安志兰; 董晓汉
Original assignee: Shandong Qingshuo Environmental Science And Technology Co ltd
Current assignee: Shandong Qingshuo Environmental Science And Technology Co ltd
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-02-26
Anticipated expiration: 2030-06-04

Abstract

The utility model relates to a waste liquid incinerator tail gas CO, NOx integration desorption device, including the waste liquid holding vessel, incinerator, exhaust-heat boiler, quench tower, sack cleaner, heater, SCR reactor and the economizer that connect gradually, the economizer communicates with the chimney through the draught fan; quench tower disposes the quench tower and possesses a jar, be provided with the blender between quench tower and the sack cleaner, the blender is connected with lime stone charging means and active carbon charging means, the flue gas inlet end of SCR reactor is connected with the ammonia tank, be provided with the multilayer catalyst in the SCR reactor, the top layer is the CO catalyst, and CO catalyst below is provided with two-layer denitration catalyst at least. The NOx and CO discharged by the incinerator after being treated by the device can reach the discharge index, and the pollution to the environment is reduced.

Description

Waste liquid incinerator tail gas CO, NOx integration desorption device

Technical Field

The utility model relates to an incinerator tail gas treatment field, concretely relates to waste liquid incinerator tail gas CO, NOx integration desorption device.

Background

In recent years, with the rapid development of fine chemical engineering, environmental pollution is becoming a social concern, especially for high-concentration organic waste liquids. At present, high technology is applied to the research of incineration technology in various countries, so that the incineration technology is rapidly developed, and a wide application prospect is provided for the incineration treatment of high-concentration organic wastewater in the chemical industry.

But inevitably produces some harmful gases during incineration, such as: SO2, NOx, CO, etc., the technology for removing SO2 is very mature at present, but the technology for treating NOx and CO is not mature, especially the removal of CO is rarely reported. Particularly, under the influence of some incineration raw materials, the concentration of NOx and CO is higher, and the treatment difficulty is higher.

Disclosure of Invention

In order to solve the problem, the utility model discloses a waste liquid incinerator tail gas CO, NOx integration desorption device burns the processing of stove tail gas through this device, and NOx and CO homoenergetic reach the emission index, have reduced the pollution to the environment.

An integrated removing device for tail gas CO and NOx of a waste liquid incinerator comprises a waste liquid storage tank, the incinerator, a waste heat boiler, a quench tower, a bag-type dust remover, a heater, an SCR reactor and an economizer which are sequentially connected, wherein the economizer is communicated with a chimney through an induced draft fan; quench tower disposes the quench tower and possesses a jar, be provided with the blender between quench tower and the sack cleaner, the blender is connected with lime stone charging means and active carbon charging means, the flue gas entry end of SCR reactor is connected with the ammonia tank, be provided with the multilayer catalyst in the SCR reactor, the top layer is the CO catalyst, and CO catalyst below is provided with two-layer denitration catalyst at least.

Preferably, a waste liquid delivery pump for providing power is arranged between the waste liquid storage tank and the incinerator, and a quenching pump for providing power is arranged between the quenching tower and the quenching water tank.

Preferably, the incinerator is connected with a combustion fan, and the incinerator is also provided with a natural gas inlet.

Preferably, the waste heat boiler is provided with a low-pressure steam outlet and a softened water inlet.

Preferably, the lime feeder and the activated carbon feeder are both connected with the mixer through a Roots blower.

Preferably, the bag-type dust collector is communicated with the mixer, and the bag-type dust collector is provided with a compressed air inlet.

Preferably, the water outlet of the economizer is communicated with the waste heat boiler, and the economizer is also provided with a softened water inlet.

The utility model has the advantages that:

1. the heater is additionally arranged between the bag-type dust collector and the SCR reactor, so that high-temperature flue gas (about 350 ℃) is formed at an air inlet of the SCR reactor, an injection point of ammonia water is positioned in a high-temperature flue, the ammonia water is gasified by utilizing the temperature of the flue, equipment such as ammonia water evaporation and dilution fans is omitted, and the flow is simplified.

2. The CO catalyst and the denitration catalyst are arranged in a reactor; the flue gas firstly passes through the CO catalyst layer, and the CO generated by insufficient combustion of the fuel is converted into harmless CO2, and the temperature of the flue gas is raised by utilizing oxidation heat release, so that favorable conditions are created for subsequent denitration reaction, the denitration efficiency of the catalyst is improved, the service life of the catalyst is prolonged, the oxygen content in the flue gas is consumed, the conversion concentration of pollutants is effectively reduced, and the standard reaching rate of pollutant emission is improved.

3. After the tail gas of the incinerator is treated by the device, NOx and CO can reach emission indexes, and the pollution to the environment is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an overall structure of the present invention;

in the figure, 1, a waste liquid storage tank, 2, a waste liquid delivery pump, 3, a combustion-supporting fan, 4, an incinerator, 5, a waste heat boiler, 6, a quench tower, 7, a quench water tank, 8, a quench pump, 9, a mixer, 10, a Roots fan, 11, a lime feeder, 12, an activated carbon feeder, 13, a bag-type dust collector, 14, a heater, 15, an ammonia water tank, 16, a reactor, 17, an economizer, 18 and an induced draft fan.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

The utility model discloses a waste liquid incinerator tail gas CO as shown in figure 1, NOx integration desorption device, organic waste liquid carries to burning furnace 4 through 2 pressurization of waste liquid delivery pump after the stirring in the waste liquid holding vessel 1, the feed end of burning furnace still sets up the compressed air inlet, the combustor on the furnace chamber sets up the natural gas air inlet, air inlet department sets up the combustion-supporting air inlet simultaneously, combustion-supporting air is provided by combustion-supporting fan 3, burn burning furnace 4 and burn burning furnace for horizontal burning furnace, for guaranteeing the abundant decomposition of waste liquid, control flue gas temperature is about 1100 ℃, organic waste liquid main combustion, the natural gas is igniteed, baker and flame on duty.

The tail gas after incineration comes out of the hearth of the incinerator, enters a waste heat boiler 5 and then enters the economizerSoftened water from 17 forms low pressure steam in exhaust-heat boiler, exhaust-heat boiler export flue gas temperature is about 500 ℃, get into quench tower 6, quench tower top is spouted into quench water, the cold water storage tank provides quench water through quench pump 8 in to quench tower, quench water is atomized through compressed air, the flue gas cools down to 200 ℃ in quench tower, quench tower export intercommunication blender 9, blender and lime charging container 11 and active carbon charging container 12 intercommunication, two equipment spout active carbon and slaked lime into the blender through roots's fan 10, absorb dioxin and acid gas in the flue gas, tail gas after the deacidification removes dust through sack cleaner 13 again, heat the cigarette temperature to more than 350 ℃ through heater 14, then get into SCR reactor 16, carry out denitration and carbon monoxide elimination processing. In an SCR reactor, a CO catalyst is arranged on the top layer, at least two levels of denitration catalysts are arranged downwards in sequence, a layer of denitration catalyst space is reserved, the denitration catalysts are vanadium-titanium system medium-temperature honeycomb catalysts, the operating smoke temperature of the catalysts is 320-420 ℃, denitration reducing agents are 20% ammonia water, the ammonia water is stored in an ammonia water storage tank, the ammonia water is conveyed by a metering pump and sprayed into a flue in front of the SCR reactor by a double-fluid atomization spray gun, the ammonia water is gasified by high-temperature smoke, and then the ammonia water enters the SCR reactor to reduce NOx into N under the action of the denitration catalysts₂。

The CO catalyst is used for removing carbon monoxide, the CO catalyst is a noble metal (iridium) catalyst and is arranged in a layer, and the catalyst is arranged in the SCR denitration reactor and is arranged at the upstream of the denitration catalyst. When CO in the tail gas flows through the catalyst layer, CO is oxidized into CO under the action of the catalyst₂. The flue gas enters the economizer 17 after coming out of the denitration reactor, and then enters the chimney through the induced draft fan 18 to be discharged into the atmosphere.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An integrated removing device for tail gas CO and NOx of a waste liquid incinerator is characterized by comprising a waste liquid storage tank, the incinerator, a waste heat boiler, a quench tower, a bag-type dust remover, a heater, an SCR reactor and an economizer which are sequentially connected, wherein the economizer is communicated with a chimney through a draught fan; quench tower disposes the quench tower and possesses a jar, be provided with the blender between quench tower and the sack cleaner, the blender is connected with lime stone charging means and active carbon charging means, the flue gas inlet end of SCR reactor is connected with the ammonia tank, be provided with the multilayer catalyst in the SCR reactor, the top layer is the CO catalyst, and CO catalyst below is provided with two-layer denitration catalyst at least.

2. The apparatus as claimed in claim 1, wherein a waste liquid transfer pump for providing power is disposed between the waste liquid storage tank and the incinerator, and a quench pump for providing power is disposed between the quench tower and the quench water tank.

3. The integrated removal device of CO and NOx in tail gas of a waste liquid incinerator according to claim 1, characterized in that the incinerator is connected with a combustion fan, and the incinerator is further provided with a natural gas inlet.

4. The integrated CO and NOx removal device for the tail gas of the waste liquid incinerator according to claim 1, characterized in that the waste heat boiler is provided with a softened water inlet.

5. The integrated CO and NOx removing device for the tail gas of the waste liquid incinerator according to claim 1, wherein the limestone feeder and the activated carbon feeder are connected with the mixer through Roots blowers.

6. The integrated removal device for CO and NOx in tail gas of a waste liquid incinerator according to claim 1, characterized in that the bag-type dust remover is communicated with the mixer, and the bag-type dust remover is provided with a compressed air inlet.

7. The integrated removal device for CO and NOx in tail gas of the waste liquid incinerator according to claim 1, characterized in that a water outlet of the economizer is communicated with a waste heat boiler, and the economizer is further provided with a softened water inlet.