CN-118169335-B - Nitrogen oxygen monitoring system

Abstract

The invention provides a nitrogen and oxygen monitoring system, and relates to the technical field of environmental protection. The device comprises an oxidation channel, an oxygen output device and a test bin, wherein the oxidation channel is used for oxidizing flue gas to be tested entering the interior of the oxidation channel, the oxygen output end of the oxygen output device penetrates through the oxidation channel to output oxygen into the oxidation channel, the air output end of the oxidation channel is connected with the interior of the test bin, and a nitrogen dioxide gas sensor is arranged in the test bin. The embodiment of the invention provides a nitrogen-oxygen monitoring system which can monitor the content of nitrogen oxides in smoke exhausted by a smoke channel.

Inventors

• HAO SHIHONG
• Xing Jiancheng
• Qiu Jiyong
• LI SHUXIONG
• GAO QI

Assignees

• 山西泰瑞祥科技有限公司

Dates

Publication Date

20260512

Application Date

20240322

Claims (5)

1. 1. The nitrogen and oxygen monitoring system is characterized by comprising an oxidation channel (11), an oxygen output device (12) and a test bin (13); the oxidation channel (11) is used for oxidizing the flue gas to be detected entering the inside of the oxidation channel, an oxygen output end of the oxygen output device (12) penetrates through the oxidation channel (11) to output oxygen into the oxidation channel (11), an air outlet end of the oxidation channel (11) is connected with the inside of the test bin (13), and a nitrogen dioxide gas sensor is arranged in the test bin (13); the device also comprises a flue gas channel (21) and a monitoring channel (22); the side walls of the flue gas channel (21) and the monitoring channel (22) comprise connectors, and the flue gas channel (21) and the monitoring channel (22) are communicated through the connectors; the high-pressure air heater (23) is arranged in the monitoring channel (22), the high-pressure air heater (23) is used for releasing high-temperature air flow into the monitoring channel (22), the temperature of the high-temperature air flow is 200-250 ℃, the flow rate of the high-temperature air flow is larger than the flow rate of flue gas in the flue gas channel (21), a gravity measuring device (24) is arranged in the monitoring channel (22), the gravity measuring device (24) is connected with a gravity sensor, the gravity sensor is used for measuring the gravity change of the gravity measuring device (24), a connecting port of the monitoring channel (22) is arranged on a channel side wall between the high-pressure air heater (23) and the gravity measuring device (24), the output end of the high-pressure air heater (23) faces the gravity measuring device (24), and the gravity measuring device (24) comprises at least one condensing channel (25), and the condensing channel (25) is used for condensing ammonium bisulfate melt; The air outlet end of the monitoring channel (22) is connected with the air inlet of the oxidation channel (11); A filter screen (26) is arranged at a connecting port of the flue gas channel (21); A wind shield (27) is arranged at the upstream of the smoke of the connecting port of the smoke channel (21), and the wind shield (27) is used for blocking part of smoke so as to slow down the flow rate of the smoke at the connecting port of the smoke channel (21); A second gas flowmeter (28) is arranged at the connecting port of the flue gas channel (21) or the connecting port of the monitoring channel (22), and the second gas flowmeter (28) is used for measuring the flow of flue gas entering the monitoring channel (22); and a gas one-way valve (29) is arranged on one side of the second gas flowmeter (28) facing the flue gas channel (21).
2. 2. The nitrogen and oxygen monitoring system according to claim 1, wherein the air outlet end of the test bin (13) is connected with an exhaust gas treatment device (14), and alkali liquor is contained in the exhaust gas treatment device (14).
3. 3. A nitrogen-oxygen monitoring system according to claim 1, characterized in that the inlet end of the test chamber (13) is provided with a first gas flow meter for collecting the flow of gas into the interior of the test chamber (13).
4. 4. A nitrogen-oxygen monitoring system according to claim 3, characterized in that the inlet end of the test chamber (13) is fitted with a valve.
5. 5. A nitrogen-oxygen monitoring system according to claim 1, characterized in that a plurality of nitrogen dioxide gas sensors are arranged in the test bin (13) in sequence along the movement direction of the flue gas.

Description

Nitrogen oxygen monitoring system Technical Field The invention relates to the technical field of environmental protection, in particular to a nitrogen and oxygen monitoring system. Background The boiler combustion can produce a large amount of flue gas, and nitrogen oxides in the flue gas are discharged into the atmosphere to pollute the atmosphere, so that acid rain is formed. In the related art, the flue gas is treated by a catalytic reduction process. However, if the denitrification device fails, a large amount of nitrogen oxides enter the atmosphere to pollute the environment. Therefore, the exhaust flue gas needs to be monitored in real time to monitor whether the nitrogen oxides leak. Therefore, in order to address the above-mentioned shortcomings, there is an urgent need for a nitrogen-oxygen monitoring system that can monitor the content of nitrogen oxides in the flue gas discharged from the flue gas channel. Disclosure of Invention The embodiment of the invention provides a nitrogen-oxygen monitoring system which can monitor the content of nitrogen oxides in smoke exhausted by a smoke channel. The technical scheme of the invention is as follows: A nitrogen and oxygen monitoring system comprises an oxidation channel, an oxygen output device and a test bin; The oxidation channel is used for oxidizing the flue gas to be detected entering the oxidation channel, the oxygen output end of the oxygen output device penetrates the oxidation channel to output oxygen into the oxidation channel, the air outlet end of the oxidation channel is connected with the inside of the test bin, and the inside of the test bin is provided with a nitrogen dioxide gas sensor. Optionally, the air outlet end of the test bin is connected with a tail gas treatment device, and alkali liquor is filled in the tail gas treatment device. Optionally, a first gas flowmeter is installed at the air inlet end of the test bin, and the first gas flowmeter is used for collecting the flow of the gas entering the test bin. Optionally, a valve is installed at the air inlet end of the test bin. Optionally, a plurality of nitrogen dioxide gas sensors are sequentially arranged in the test bin along the movement direction of the flue gas. Optionally, a nitrogen-oxygen monitoring system further comprises a flue gas channel and a monitoring channel; The side walls of the flue gas channel and the monitoring channel comprise connectors, and the flue gas channel and the monitoring channel are communicated through the connectors; the high-pressure air heater is arranged in the monitoring channel and used for releasing high-temperature air flow into the monitoring channel, the temperature of the high-temperature air flow is 200-250 ℃, the flow speed of the high-temperature air flow is greater than the flow speed of flue gas in the flue gas channel, the gravity measuring device is arranged in the monitoring channel and connected with a gravity sensor, the gravity sensor is used for measuring gravity change of the gravity measuring device, a connecting port of the monitoring channel is positioned on the side wall of the channel between the high-pressure air heater and the gravity measuring device, the output end of the high-pressure air heater faces the gravity measuring device, the gravity measuring device comprises at least one condensation channel, and the condensation channel is used for condensing ammonium bisulfate melt; And the air outlet end of the monitoring channel is connected with the air inlet of the oxidation channel. Optionally, a filter screen is installed at the connection port of the flue gas channel. Optionally, a wind guard is installed upstream of the flue gas of the connection port of the flue gas channel, and the wind guard is used for blocking part of flue gas so as to slow down the flue gas flow rate at the connection port of the flue gas channel. Optionally, a second gas flowmeter is installed at the connection port of the flue gas channel or the connection port of the monitoring channel, and the second gas flowmeter is used for measuring the flow rate of flue gas entering the monitoring channel. Optionally, a gas check valve is installed on the side, facing the flue gas channel, of the second gas flow meter. Compared with the prior art, the invention has at least the following beneficial effects: By arranging the oxidation channel, the oxygen output device and the test bin, after the flue gas to be tested enters the oxidation channel, nitric oxide in the flue gas and oxygen output by the oxygen output device are mixed and react, so that the nitric oxide is converted into nitrogen dioxide. The flue gas enters the test bin through the oxidation channel, and the nitrogen dioxide gas sensor in the test bin can test the concentration of nitrogen dioxide in the flue gas. The nitrogen monoxide in the flue gas is completely converted into nitrogen dioxide by arranging the oxidation channel and the oxygen output device, and finally the con