Device and method for treating escaped ammonia of tunnel kiln for calcining denitration catalyst
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The technology of denitration catalyst and treatment device is applied in the field of fugitive ammonia treatment device, which can solve the problems of large floor space, high engineering cost and long process route, and achieve the effects of small floor space, pollution reduction and simple process operation.
Pending Publication Date: 2020-02-28
XIAN THERMAL POWER RES INST CO LTD
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At present, the conventional treatment measures for exhaust gas in tunnel kilns for calcining catalysts are to pass exhaust gas through flue gas dust removal, exhaust gas absorption tower, and then directly vent through chimney. This method occupies a large area, high engineering cost, and long process route, so the tunnel is simplified. kiln and it is necessary to set escape ammonia treatment system and dust removal system at the exhaust outlet
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Embodiment 1
[0032] Such as figure 1 As shown, the escape ammonia treatment device of a tunnel kiln for calcining denitrification catalysts in the present invention includes a waste gas collection pipe 4, an exhaust fan 5, and a waste gas reactor 7; The fan 5 transports the exhaust gas to the exhaust gas reactor 7, removes the escaped ammonia and dust particles in the exhaust gas, and then empties or reuses it; the exhaust gas reactor 7 contains a dust removal filter cloth layer 8, a back-blowing device 9, Ammonia removal filter cloth layer 10, the dust removal filter cloth layer 8 is used to remove dust and salt particles in the exhaust gas, and the back blowing device 9 regularly purges the dust removal filter cloth layer to reduce its gas resistance. The grade ammonia removal filter cloth layer 10 is used to catalyze the elimination of ammonia in exhaust gas.
[0033] Wherein, the material of the filter cloth in the dust removal filter cloth layer 8 can be P84, PTFE, or PPS.
[0034] ...
Embodiment 2
[0037] A method for treating slip ammonia in a tunnel kiln for calcining a denitrification catalyst, comprising the following steps,
[0038] Step 1, the exhaust fan 5 forms a negative pressure inside the tunnel kiln through the exhaust gas collection pipe 4, collects the exhaust gas discharged from the tunnel kiln, and transports the collected exhaust gas to the exhaust gas reactor 7;
[0039] Step 2, enter the waste gas in the waste gas reactor 7,
[0040] First, dust, dust and salt particles in the exhaust gas are removed through the dust filter cloth layer 8;
[0041] Secondly, the ammonia in the exhaust gas is catalyzed and eliminated through the multi-stage ammonia removal filter cloth layer 10;
[0042] Finally, the waste gas from which dust particles and ammonia have been removed is discharged out of the waste gas reactor 7 to be emptied or reused.
[0043] Wherein, the discharge fan 5 is a variable frequency fan, and the power is adjusted through a frequency convert...
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Abstract
The invention relates to the technical field of waste gas treatment of tunnel kilns, specifically to a device and a method for treating escaped ammonia of a tunnel kiln for calcining a denitration catalyst. The device comprises a tunnel kiln main body, a waste gas collecting pipeline arranged in the tunnel kiln main body, and a waste gas reactor connected with and arranged on the waste gas collecting pipeline, wherein an exhaust fan is arranged on a connecting pipeline of the waste gas reactor and the waste gas collecting pipeline; and a dust removal filter cloth layer, a blowback unit and a multi-stage ammonia removal filter cloth layer are sequentially arranged in the waste gas reactor in a direction from an inlet to an outlet. The device provided by the invention directly utilizes the waste gas collection pipeline in the tunnel kiln to convey waste gas to the waste gas reactor in a centralized manner, respectively treat and remove dust particles and the escaped ammonia through a filter cloth in the dust removal filter cloth layer, is reasonable in design, high in economical efficiency and small in occupied area, can efficiently remove ammonia and impurities from the waste gas ofthe tunnel kiln, effectively purifies the waste gas of the tunnel kiln, and greatly reduces air pollution caused by the waste gas of the tunnel kiln.
Description
technical field [0001] The invention relates to the technical field of tunnel kiln waste gas treatment, in particular to a tunnel kiln escape ammonia treatment device for calcining denitration catalysts and a method thereof. Background technique [0002] NH 3 It is a colorless, flammable, typical industrial gaseous pollutant with pungent odor, and its discharge seriously threatens the ecological environment. It reacts with sulfuric acid and nitric acid in the atmosphere to form ammonium sulfate or ammonium nitrate. These salts are deposited to cause acidification of soil and surface water, eutrophication of water bodies, and the nitrogen balance in the ecosystem will also be seriously disturbed. Secondly, NH 3 It is also one of the main pollutants involved in the formation of aerosols, generating solid particles (PM) with an aerodynamic diameter of less than 2.5 μm 2.5 ), after entering the alveoli of the human body, it will directly affect the ventilation capacity of the...
Claims
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