��͸ɷ�ˮ��G��Ƽ��g

��r�g��2008-11-18 10:36 ��Դ�� : ��x��2932

ժ Ҫ��ڷ��҇�ˮ��G��ā�Դ��ŷ��Ļ��A��,��F(xi��n)�еĭh(hu��n)��˜��M�Ќ��u��˲��SNCR��SCR��Ó��g��ԭ��ˇ��,��

�P�I�~��ˮ��G,��⣻��,��

1 ˮ��G��

2007��,��҇�ˮ�࿂�a(ch��n)��13.6�|��ŷŵ��157�f��,��ռȫ��I(y��)�ŷſ��15%,��Ǿӻ��l(f��)늡��܇β��֮��ĵ��ŷŴ��,�,��D�G��͸ɷ�ˮ��ϟ��ɵ��P�I��g�b�䣬Ҳ��NOx��Ҫ��Դ,��џ�ˮ��ϕr��һ��NO��;��Ҫ��ķN[1],��һ�N��NOx��ȼ��ˮ��G�^1400��ȼ��r��a(ch��n)��NOx,��ڶ��N˲�l(f��)NOx,��̼��ڕr��ڻ��ǰ��˲�l(f��)�γɵ�NOx,��һ��@�N˲�l(f��)NO��ı��,��Nȼ��NO,��ȼ��Ļ��W�Ӻϵ��a(ch��n)��,��ú�мs��0.5��2��ĵ�(��|(zh��)��Ӌ)��ȼ��е�ԭ�ӵĽӺ��^С,��ˮ��Gϵ�y(t��ng)��^�͜صķֽ�t��(n��i)�a(ch��n)��ȼ��NOx�^��,��ķN��NOx��ɸGι��к��Ļ��ֽ��γɵ�NOx,��NH4��,��ڸG�U��NO2һ��HռNO+NO2��5��,��NO�tռ��95��ϡ�

��҇��͸ɷ�ˮ��D�G�ϳ��õ�NOx��Ƽ��g��Ҫ��׷N��һ�ǃ�(y��u)��G�ͷֽ�t��ȼ��ƶ�,��Ǹ�׃��Ϸ��,��õV��󽵵��ϟ��ɜضȺ͕r�g��M��ן��,��ǲ��õ�NOx��ȼ��,��ڸGβ�ֽ�t�͹ܵ��е��A��ȼ��g��Ȼ��,��ʹ��ķN��ʩȫ��,��ˮ��G��NOx �ŷ�Ҳ��y�_��400mg��Nm3��¡��x��ԷǴ߻�߀ԭ��SNCR��Ó��x��Դ߻�߀ԭ��SCR��Ó��Mһ��NOx�ŷŵĴ�ʩ��һ��ǳ��Ч�Ľ��NOx�ŷŵ�;��,��

2 ˮ�๤�I(y��)NOx ��ŷŘ˜�

ˮ�๤�I(y��)NOx��ŷŘ˜�,��H�ŷŔ�(sh��)��(n��i)�͇��Ę˜ʡ��Ҏ(gu��)��ˮ�๤�I(y��)NOx �ŷŵ��޶�ָ��Ҋ��1[2] ,��1mg/ Nm3 ≈1.8cm3/Nm3 ,��30��ıO(ji��n)�y�Y��@ʾ,��D�G�U��NOx�ŷŝ�ȴ�s��300��2200mg/ Nm3��(n��i)�\�е��͸ɷ�ˮ��GNOx�ŷŝ��ȱ��ϵ�y(t��ng)�Ľy(t��ng)Ӌ��(sh��)��(j��),��(j��)һЩ��ȫ�ıO(ji��n)�y��(sh��)��(j��)�@ʾ,��s��800��1600mg/Nm3 ��ң��_��Ҙ�GB4915-2004�͚W�˘˜�2000/76/ECҎ(gu��)��Ҫ��,��

��1 ��(n��i)�͇��Ę˜�,��Ҏ(gu��)��ŷŵ��޶�ָ��

3 �x��ԷǴ߻�߀ԭ��SNCR��Ó��

3.1 SNCR ��NOxԭ��[3]

�ڷֽ�t��²�(�s950��) ��߀ԭ��[CO(NH₂)₂]��ˮ(NH₄OH) ,��в��ڵėl��,�l(f��)��·��^�̡�

��ضȵ��800��r,NH₃�cNO�ķ��ٶȺ��,��ضȸ��1050��r��ʽ(2)��u��,��ضȸ��1300��rNH₃�D׃?y��u)�NO��څ�ݕ�׃��@,��

SNCR�ķ��C��ǳ��s��Ŀǰ��δ��ȫ�˽�,��(sh��)�W��J��NHx��߀ԭ��D1 ��ʾ��;��

3.2 ��ˇ��̣��D2��

�ڷֽ�t��²��백ˮ��ص��Һ,��ʹ֮�c��е�NOx��ϣ��߀ԭ�ɵ��ˮ,��@�ӾͿ��^��ȵ��pNOx��ŷ�,��pЧ��_30��85��NO₂�ŷŝ�ȿɽ��200��400mg��Nm³,��ˮ��޵İ�ˮ��(j��ng)�^�^�V��,��ͨ�^��ˮ��ӱ��ֽ�t��ӱõ��Һ��(j��ng)�^�V��M��{(di��o)��(ji��)�y��Ӌ,��(j��ng)Ӌ��Һ�M�뇊��,��ڇ��(n��i)�c��s�՚��ϣ��F��ֽ�t��(n��i),��λ��ڷֽ�t�в�(λ��Ҋ�D2) ,��ж��,��P�I��g�Ǉ��λ�õĴ_��_��λ��Ҫ��]�O��(n��i)��Ě��w�ض�,��߀ԭNOx��m�˜ضȞ�950�桫1050�棬��̎��(n��i)��w�ضȼs1000��,��ĽY��͇��|(zh��)��O��ļ��g�P�I,��ĽY��OӋ��ԓ��ȱ��Cʹ��Һ��õ��F��Ч��Α��]��챾��̎�ڸߜز�λ,��õ��͟��,��ן��p��

4 �x��Դ߻�߀ԭ��SCR��Ó��

4.1 SCR ��NOxԭ��

�M�ܾC�ϲ��N��ʩ��SNCR�ڃ�(n��i),��_��ˮ��GNOx��ŷŷ�(w��n)��200mg��Nm³��(�F(xi��n)�е��˜�),��@��Ҫ��ĸ��в��󣬼��ɿ��c��ȫ��Mһ��,��Ǿͳ��F(xi��n)��x��ԷǴ߻�߀ԭ��SNCR��Ó��,��A��ڵĹܵ��ϰџ��⣨�s350�棩��SCR��ڹܵ��ϼ��߀ԭ��[CO(NH₂)₂]��ˮ(NH₄OH),��ڴ߻��±��߀ԭ��o��ĵ��ˮ��

4.2 ��ˇ��̣��D3��

�ڸGβ�A��֮�g��Oһ��SCR��,��C1�A��ďU��ԓ��ϲ��룬�c��(n��i)�İ�ˮ��ص�߀ԭ��,��(n��i)��ӽ��|��Ĵ߻��,��_��Ó��ֵ��ɣ��Ӱ�ʽ�߻��V₂O₅,��W₂O₃�Ȼ��ԽM��Ƴɵ�,��

SCRÓ��ˇ�b�õ��Ҫ�M�ɲ��ְ��һ��b�߻��SCR��һ��޼�һ��߀ԭ��ע��ϵ�y(t��ng),��߀ԭ��ǎ��ğoˮҺ��,��Ҳ��ǳ��µİ�ˮ��Һ (ͨ��Ȟ�25%) ��߀��ˮ��Һ(ͨ��Ȟ�40%),��ð�ˮ��Һ�r,��ͨ��ͨ�^λ�ڌ��ܻ��F��ֱ��ע�뵽��ͨ��С��oˮҺ��ă��扺��ȡ�Q�ڃ��޵Ĝض�(��20��r��1000kPa),��Һ��ͨ�^��l(f��)��е��,��ˮ��늱��p��l(f��)��Ȼ��,��l(f��)�İ��⽛(j��ng)�՚�ϡ�,��ͨ�^ע��ϵ�y(t��ng)��ע�뵽��С�ע��ϵ�y(t��ng)��S��ע�䇊��M��,ʹ��͟��ֲ�,��һ��,��ڇ��씵(sh��)��^�ٵ��r��,��ԽY��һ��o�B(t��i)�Ļ��һ��ʹ�á��ڟ��(n��i)�ľ��ֲ��ڌ��F(xi��n)NOX��Ч߀ԭ,��^�͵İ��ݳ��Լ��ɴ��_��߻��Ч��ö�ʮ��Ҫ,��NOX ԭ�̶Ⱥܸߕr��ֲ��ஔ��Ҫ,��

5 �Y��Z

��1��ˮ�๤�I(y��)�S��͸ɷ�ˮ�༼�g�İl(f��)չ�ͭh(hu��n)��˜�Ҫ��,�� SNCR��SCRÓ��ɞ��g��

��2��I(y��)�ڲ�ͬ�ĵ؅^(q��)�Ͳ�ͬ�r��,��x��SNCR��SCR��Ó��g,��SNCR��Ó��Ч�ʞ�50%��60% ��x��Դ߻�߀ԭ��(SCR)Ó��Ч��(80%��90%),��SNCR��M��(��O��M�úͲ��M��) ֻ��SCR ��֮һ��,��

��3��SCR��Ó��g��һ�SCR��H�ߝ��M��ü��g��SCR��Ա��C�U��NOX��Ƚ��100��200mg��Nm³,��NO₂�Ĝp��Ч��_85��95��,��p��ܲ��SNCR�ǘ��ܵ�ˮ��GҎ(gu��)��ͻ��Ӱ푣��SCR��Ҫʹ�ú��ăr��F��F��ٴ߻��,��ˮ��I(y��)�U��ķۉm��Ⱥܸ�,��A��ٺ��^�ߣ��ʹ�߻��ж��Ͷ��,��ˮ�๤�I(y��)�ϵČ��`��_ʼ��,��߀��T��M�Ŀ��g��

����D�d��ǳ��ڂ��f��Ϣ֮Ŀ��,��Ё�Դ��ע�e�`��ַ��ĺϷ��,��Ո��߳֙��C��c��W(w��ng)(li��n)ϵ��҂��r��,��h��,��x�x��