SNCRÓ��g(sh��)�ڴ��ú�۠t�еđ�(y��ng)��

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

1 SNCRÓ��ԭ��

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

�� NH3 ��߀ԭ��,��ڜضȞ� 900��~1 100��ķ��(n��i)��߀ԭ NOx �Ļ��W��(y��ng)��ʽ��Ҫ�飺

��߀ԭ��߀ԭ NOx ��Ҫ��W��(y��ng)�飺

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

�Ķ�,��NH3 ��óɞ�� NO��߀ԭ NO�� N2,�,��֮��SNCR ߀ԭ NO��^����(y��ng)�໥��,�� ͬ��õĽY(ji��)��,�� xȡ��m�Ĝضȗl��ͬ�r��p��߀ԭ��й©�ɞ� SNCR ��g(sh��)�ɹ��(y��ng)�õ��P(gu��n)�I��

2 SNCRÓ��ă�(y��u)�c

�x��ԷǴ߻�߀ԭ��g(sh��)(SNCR)��(y��u)�c��

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

(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(y��)��,��

3 SNCRϵ�y(t��ng)��Ӱ��

��D 1�� ͵� SNCR ϵ�y(t��ng)��߀ԭ��,�� ߀ԭ��b��Լ��(y��ng)�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(sh��)��͇��ϵ�y(t��ng)��԰��b,��ʼͶ�Y�� SCR ��ˇ��fҪ�͵ö�,��M��c SCR ��ˇ�ஔ��һ��r�� SNCR ��_�� 60%�� 70%�� NOx ߀ԭ�ʣ��ԝM��P(gu��n)�h(hu��n)��Ҫ��,��

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

3.1 �ضȌ� SNCR ��߀ԭ��(y��ng)��Ӱ�

�ضȌ� SNCR ��߀ԭ��(y��ng)��Ӱ��󡣮��ضȸ�� 1 000��r,��NOx ��Ó��ڰ��ğ�ֽ��,��ضȵ�� 1 000��r,��NH3 �ķ��(y��ng)��½�,��߀ԭ��(y��ng)�M�еò��֣�NOx Ó��½�,��ͬ�r��ݳ��Ҳ��,��ڠt��(n��i)�Ĝضȷֲ��ܵ�ؓ�ɡ�ú�N�ȶ�N��ص�Ӱ�,��ضȴ��S��偠tؓ�ɵ�׃��׃��,��(j��)偠t��Ժ��\�н�(j��ng)򞣬��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��ʡ� ��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�ʣ�߀ԭ��횱Ȼ��WӋ��Ҫ��,��(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��(y��ng)��

��؞�߀ԭ��Ĳ��ϵ�y(t��ng)�У��ܕ��и�� 10%�� NOx �D(zhu��n)׃?y��u)?N2O��^�@��ͨ�^��^��_�Ĳ��l��ƶ��_��p N2O ��ɵ�Ŀ��,��,��l��δ�ܿ��Ƶ��(y��u)��Ġ�B(t��i)��ŷų�� CO,��

�� SNCR �� NOx��߀ԭЧ��,��Ͱ��й©��O(sh��)Ӌ�A��c��]��ׂ��P(gu��n)�I�Ĺ�ˇ��(sh��)��ȼ��,��偠tؓ��,��t�ŽY(ji��)��(g��u)��ܟ��沼��,��^��՚��,��NOx ��ȡ��t�Ŝضȷֲ�,��t�Ś��ֲ��Լ� CO��ȵ�,��

4 ��Y(ji��)

SNCR �b�ú��ν�(j��ng)��,��r��,��һ�N��(j��ng)��õ� NOx ߀ԭ��g(sh��)��ڄe��Ó��g(sh��)��f,��Ŀǰ�m��҇��Ó��g(sh��)��x��,��

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