SNCR Ó��g�ڴ��ú�۠t�Б��̽ӑ

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NOx ��һ�N��Ҫ�Ĵ��Ⱦ��|,��NOx �c̼�仯��ڏ��ɹ⻯�W��Ⱦ��ŷŵ��е�NOx��γ��Ҫԭ��,��Σ��B(t��i)�h(hu��n)��,��Ŀǰ��65%��ҵ�NOx��úȼ��a��ģ��Ҫȼú�O��վ偠t�͹��I(y��)偠t�ɞ�� NOx�ŷ��Pע�Ľ��c,��Ŀǰ�҂��ѽ��ȡ�T��NOxȼ��,��ּ��L��OFA(Over Fire Air),��ȼ�ȼ��g��ʩ�� NOx��ŷ�,��ȡ��һ��Ч��S��˂��h(hu��n)��Ҫ��Ĳ��ߣ��NOx�ŷŘ˜ʄݱ�ҲԽ��Խ��,�� Ҫ��ȼú�վ偠tNOx��ŷű�횵��250 mg⋅Nm-3 ��Ҫ��,��Ŀǰ650 mg⋅Nm-3 �ć��Ҫ��Ҫ��ö࣬��׷N��g��ʩ��y�_��250 mg.Nm-3 ��ŷ�ָ��,��韟��ʽ��x��Դ߻�߀ԭ(SCR)�mȻ��ȡ�ø��_90%�� NOxÓ��,�� SCR ��g��䰺�F�Ĵ߻��}��Ͷ�Y�^��(��s 40 ��Ԫ⋅kW-1 ~ 60 ��Ԫ⋅kW-1 )��V��,��^��r��x��ԷǴ߻�߀ԭ(SNCR)��g(��s 5 ��Ԫ⋅kW-1 ~10��Ԫ⋅kW-1 )�� NOx Ó��ʿ��_70 %~80 %,��һ�N��õ� NOx Ó��g,��SNCR �� 20 ��o70 ��ձ��ȼ�⡢ȼ��늏S�еõ��,��ƏV��W�˺��,��Ŀǰ��ֹ��ȼú늏S SNCR ��ˇ�Ŀ��b�C��s�� 2 GW ��ϡ�

1 SNCRÓ��ԭ��

�x��ԷǴ߻�߀ԭ(SNCR)Ó�� NOx��g�ǰѺ�� NHx ��߀ԭ��(�簱��,�� ˮ��ص�)��t�ŜضȞ� 800��~1 100��ą^(q��)��,��ԓ߀ԭ��Ѹ�ٟ�ֽ�� NH3 ��a��S�� NH3 �c��е� NOx �M�� SNCR �� N2,��

�� NH3 ��߀ԭ��,��ڜضȞ� 900��~1 100��ķ��ȣ�߀ԭ NOx �Ļ��W��ʽ��Ҫ�飺

��߀ԭ��߀ԭ NOx ��Ҫ��W��飺

SNCR ߀ԭ NO�ķ��ڜضȗl��ǳ��,��t��χ��c��x��,��Ҳ��^�Ĝضȴ��ڵ��x�� SNCR߀ԭ NOЧ�ʸߵ͵��P�I,��һ��J��Ĝضȷ�� 700��~1 100��, ��S��͵�׃��ͬ,��ضȵ��ڜضȴ��ڕr��ͣ��r�g��,��ʹ��W��M�еĳ̶��^�ͷ��ص�,��Ķ�� NO ��߀ԭ��^�ͣ�ͬ�rδ��c�� NH3 ��Ҳ��ɰ��й©,�� ضȸ��ڜضȴ��ڕr,�� NH3 ��_ʼ��ã�

�Ķ��NH3 ��óɞ�� NO,��߀ԭ NO�� N2,��֮,��SNCR ߀ԭ NO��^����໥��,�� ͬ��õĽY�� xȡ��m�Ĝضȗl��ͬ�r��p��߀ԭ��й©�ɞ� SNCR ��g�ɹ��õ��P�I��

2 SNCRÓ��ă�(y��u)�c

�x��ԷǴ߻�߀ԭ��g(SNCR)��(y��u)�c��

(1) ϵ�y(t��ng)��Σ��Ҫ��׃�F(xi��n)��偠t��O��O��,��ֻ��ڬF(xi��n)�е�ȼú偠t�Ļ��A��Ӱ��؃��,��؇��b�ü��䇊��ڼ��ɣ�ϵ�y(t��ng)�Y��^��,��

(2) ϵ�y(t��ng)Ͷ�Y�,��SCR�Ĵ�s40��ԪkW-1 ~60��ԪkW-1 �İ��F��r��ϵ�y(t��ng)��Լ��\��в��Ҫ��F�Ĵ߻��ֻ��Ҫ��r��ػ�Һ��,�� SNCR ��s 5 ��Ԫ⋅kW-1 ~10 ��ԪkW-1 ��r�@Ȼ��m��҇��,��

(3) ��С��偠t��\��Ӱ��^�,�,��

(4) ϵ�y(t��ng)ռ��eС��Ҫ��^С�İ��؃��,��ɷ��偠t䓼�֮�϶��Ҫ�~��ռ��A��,��

3 SNCRϵ�y(t��ng)��Ӱ��

��D 1�� ͵� SNCR ϵ�y(t��ng)��߀ԭ��,�� ߀ԭ��b��Լ��Ŀ��ϵ�y(t��ng)�M��,��Ĺ�ˇ��Σ��,��SNCR ��ˇ��Է��ڬF(xi��n)��b��M�и��b,��Ҫ�߻��ӣ��H�H��Ҫ��߀ԭ��ă��O��͇��ϵ�y(t��ng)��԰��b,��ʼͶ�Y�� SCR ��ˇ��fҪ�͵ö�,��M��c SCR ��ˇ�ஔ��һ��r�� SNCR ��_�� 60%�� 70%�� NOx ߀ԭ��,��ԝM��P�h(hu��n)��Ҫ��,��

SNCR ߀ԭ NO�Ļ��W��Ч��ȡ�Q�ڟ��ضȣ��ߜ��ͣ��r�g,��Ｔ߀ԭ��ע��ͺ͔�(sh��)��,��Ч��Լ� NOx �ĺ��ȵȡ�

3.1 �ضȌ� SNCR ��߀ԭ��Ӱ�

�ضȌ� SNCR ��߀ԭ��Ӱ��,��ضȸ�� 1 000��r,��NOx ��Ó��ڰ��ğ�ֽ��ͣ��ضȵ�� 1 000��r,��NH3 �ķ��½�,��߀ԭ��M�еò��֣�NOx Ó��½�,��ͬ�r��ݳ��Ҳ��,��ڠt�ȵĜضȷֲ��ܵ�ؓ��,��ú�N�ȶ�N��ص�Ӱ푣��ضȴ��S��偠tؓ�ɵ�׃��׃��,��(j��)偠t��Ժ��\�н��,��ѵĜضȴ��ͨ��F(xi��n)��Ǹ��ʽ�^��ٟ��̎��ˮƽ��ĩ��^,��ٟ��ڵą^(q��)��,��

3.2 ߀ԭ��ќضȴ��ڵ�ͣ��r�g

߀ԭ��ќضȴ��ڵ�ͣ��r�gԽ�L��tÓ�� NOx ��Ч��Խ��,��NH3 ��ͣ��r�g��^ 1 s�t��Գ��F(xi��n)��NOxÓ��,�� غͰ�ˮ��Ҫ0.3 s~0.4 s��ͣ��r�g��_��Ч��Ó��NOx ��Ч��

3.3 SNCR ��ˇ��õ�߀ԭ��

SNCR ��ˇ��õăɷN��߀ԭ��ǟoˮ��Һ��,��˫@�� NOx Ó��Ч��,��߀ԭ��횱Ȼ��WӋ��Ҫ�ࡣ��(sh��)�^��߀ԭ��ֽ�鵪�� CO2,��ǣ�Ҳ��΢��İ�� CO��β��,��ɰ��й©��},��а��й©��һ��С�� 2.5×10-5 ��^�õ��r�¿��С�� 10-5 ,��߀ԭ��r��,�� N2O ��Ɏ��Ҫ��ð��߀ԭ��ö࣬�@��ؿɷֽ�� HNCO,�� HNCO �ֿ��Mһ��ֽ��ɞ� NCO,�� NCO��c NO�M�з��