JP2005230618A5 - - Google Patents

Claims (10)

A method for removing nitrogen oxides contained in a gas,
A removal step of removing nitrogen oxides contained in the gas by supplying the gas to a nitrogen oxide adsorbing means including a solid adsorbent that adsorbs and removes nitrogen oxides;
The function of removing the nitrogen oxides of the nitrogen oxide adsorbing means reduced by the removing step is supplied through the regenerant supply pipe provided with a plurality of regenerant supply ports surrounded by the solid adsorbent. Nitrogen oxide in which the solid adsorbent is adsorbed by supplying a regenerant containing a basic substance or a reducing substance from the mouth to the solid adsorbent and heating the solid adsorbent with heat supplied by the regenerant supply pipe And a regeneration step of regenerating by removing the nitrogen oxide. Method for removing the regeneration step, nitrogen oxides according to claim 1, characterized in that it comprises a step of blowing from the regenerant supply port to said solid adsorbent. 3. The method according to claim 1 , further comprising a detection step of detecting the removal function by a nitrogen oxide sensor, wherein the regeneration step is performed when a decrease in the removal function is detected in the detection step. A method for removing nitrogen oxides according to claim 1. The nitrogen oxide removal according to any one of claims 1 to 3 , wherein the regenerant is circulated between the nitrogen oxide adsorption device and a regenerant tank storing the regenerant. Method. The nitrogen oxide according to any one of claims 1 to 4 , wherein the gas is a gas collected from any air in a road tunnel, underground parking lot, or in the vicinity of an urban trunk road. Removal method. Method for removing the solid adsorbent, the nitrogen oxide according to any one of claims 1 to 5, characterized in that the carbon-based material. Method for removing the basic substance, nitrogen oxides according to any one of claims 1 to 6, characterized in that the hydroxides or alkaline earth metal of the alkali metal. The method for removing nitrogen oxides according to any one of claims 1 to 6 , wherein the reducing substance is sulfite. An apparatus for removing nitrogen oxides contained in a gas,
Nitrogen oxide adsorption means including a solid adsorbent that adsorbs and removes nitrogen oxides;
When the nitrogen oxide removing function of the nitrogen oxide adsorbing means is lowered, a basic substance or a reducing substance is removed from a regenerant supply pipe surrounded by the solid adsorbent and provided with a plurality of regenerant supply ports. And a regenerant supply means for supplying heat to the solid adsorbent,
An apparatus for removing nitrogen oxides, wherein the reduced removal function is regenerated by removing nitrogen oxides adsorbed on the solid adsorbent with the regenerant. The nitrogen oxide removing apparatus according to claim 9 , wherein the regenerant supply pipe includes a blowing unit that blows air to the solid adsorbent from the regenerant supply port.