CN202460474U

CN202460474U - Integral desulfurization and denitration complete device by catalytic reduction ammonia method for small and medium boilers

Info

Publication number: CN202460474U
Application number: CN2012200244638U
Authority: CN
Inventors: 曲芳; 徐德成
Original assignee: DALIAN BEST ENVIRONMENT EQUIPMENT Co Ltd
Current assignee: DALIAN BEST ENVIRONMENT EQUIPMENT Co Ltd
Priority date: 2012-01-19
Filing date: 2012-01-19
Publication date: 2012-10-03
Anticipated expiration: 2022-01-19

Abstract

The utility model relates to an integral desulfurization and denitration complete device by a catalytic reduction ammonia method for small and medium boilers, belonging to the technical field of a desulfurization and denitration device. An air inlet flue is provided with a temperature control valve and a temperature gauge; the air inlet flue is connected with a denitration reactor; the temperature control valve is connected with an ammonia storage tank; a liquid ammonia supply pipeline is connected with the ammonia storage tank which is connected with a desulfurization ammonia liquid tank; the desulfurization ammonia liquid tank is connected with an ammonia liquid pump which is connected with a desulfurization reactor; the denitration reactor is internally provided with a cellular catalyst layer; the lower part of the cellular catalyst layer is provided with a plate-type catalyst layer; the denitration reactor is connected with the desulfurization reactor; the desulfurization reactor is provided with an air outlet flue; the ammonia storage tank is connected with an ammonia evaporation tank which is connected with an ammonia adjusting valve connected with an ammonia grid and a mixer; and the ammonia grid and the mixer are connected with the denitration reactor. The device integrates the advantages of selective catalytic reduction (SCR) denitration and ammonia process desulfurization for supplement; and the device is reasonable in configuration, and has the advantages of being compact in structure, low in running cost, high in efficiency and the like.

Description

Integrated medium small boiler catalytic reduction ammonia process of desulfurization denitration complexes

Technical field

The utility model relates to integrated medium small boiler catalytic reduction ammonia process of desulfurization denitration complexes, belongs to denitration desulfurizer technical field.

Background technology

At present, for the denitration desulfurization of large-sized station boiler flue gas, general common employing two overlaps independently that system carries out desulfurization and denitration to boiler smoke respectively.The sulfur removal technology device generally adopts process units such as lime stone-gypsum method, two alkaline process, magnesium oxide method, ammonia process, and pluses and minuses are respectively arranged, and wherein the lime stone-gypsum method is generally used, and mainly has equipment pipeline easy scale formation, consumes problems such as amount of lime is big; Denitration generally divides denitration and the outer denitration of burning back stove in the boiler combustion forehearth, and the outer denitration of stove comprises SCR method, activated carbon method etc.Adopt desulfuring and denitrifying apparatus simultaneously, less at present, for medium small boiler,, " thermal power plant's atmosphere pollutants emission standards " GB13223-2011 comes into effect owing to rising just on January 1st, 2012, and still less domestic.The main technique device comprises in-furnace calcium spraying burning process, the outer ammonia process adsorption and oxidation technology of stove etc.In-furnace calcium spraying burning is because the out of stock efficient of desulfurization is low, the use of this process unit that influenced drawbacks limit such as boiler thermal output.The outer ammonia process adsorption and oxidation of stove generally adopts oxygen supply that NO is oxidized to NO ₂Or adopt the ozone oxidation mode, because operating cost is high, in actual engineering, use case not have.

Summary of the invention

In order to overcome above-mentioned deficiency, the purpose of the utility model SCR catalytic-reduction denitrified with ammonia process of desulfurization basis on develop OneBody medium small boiler catalytic reduction ammonia process of desulfurization denitration complexes, the flue gas desulfurization and denitrification that is specially adapted to medium small boiler is handled.Gathered the catalytic-reduction denitrified advantage with the ammonia process of desulfurization of SCR, complemented one another, the device configuration rationally has that a whole set of assembling structure is compact, operating cost low, efficient advantages of higher.

The utility model is realized through following technical scheme: the utility model mainly is made up of flue and temperature control adjusting valve, liquefied ammonia storage, distribution, evaporation, conveying and retracting device, catalytic-reduction denitrified reactor, desulfurization reactor.

The utility model be for improve SCR catalytic reduction denitration device the escaping of ammonia loss problem and overcome medium small boiler cigarette temperature, the dust variation waits on the shortcoming basis greatly and improves integrating apparatus.Its main feature is: denitration, desulfurization all select for use ammonia as main medicament; Wherein denitration adopts the liquefied ammonia evaporation as the catalytic reduction denitration device reducing agent, and desulfurization is adopted liquefied ammonia dilution, denitration escape ammonia and evaporation to reveal useless ammonia and reclaimed as desulfurization adsorption reaction agent; To medium and small boiler flue-gas temperature less stable characteristics, smoke regulating valve and ammonification control valve are set on flue, regulate the cigarette temperature; Three pull-up denox catalysts are installed in the Benitration reactor; Upper two layers is installed the honeycomb fashion catalyst that specific area is big, heat resistanceheat resistant alluviation ability is strong; Following one deck is installed the board-like catalyst that deashing is convenient, block resistance is good, makes the advantage of two kinds of catalyst all obtain abundant use.

The utility model comprises air inlet flue, temperature-sensing valve, thermometer, Benitration reactor, feed flow ammonia pipeline, storage ammonia jar, ammonia still process jar, ammonia control valve, ammonia-spraying grid and blender, desulfurization ammoniacal liquor jar, ammoniacal liquor pump, desulfurization reactor, honeycomb fashion catalyst layer, board-like catalyst layer, the flue of giving vent to anger; Temperature-sensing valve and thermometer are installed on the air inlet flue, and the air inlet flue is connected with Benitration reactor, and temperature-sensing valve connects storage ammonia jar; Feed flow ammonia pipeline connects storage ammonia jar, and storage ammonia jar connects desulfurization ammoniacal liquor jar, and desulfurization ammoniacal liquor jar connects the ammoniacal liquor pump; The ammoniacal liquor pump connects desulfurization reactor, and there is the honeycomb fashion catalyst layer Benitration reactor inside, and board-like catalyst layer is arranged at honeycomb fashion catalyst layer bottom; Benitration reactor connects desulfurization reactor, and desulfurization reactor is equipped with the flue of giving vent to anger.Storage ammonia jar connects the ammonia still process jar, and the ammonia still process jar connects the ammonia control valve, and the ammonia control valve connects ammonia-spraying grid and blender, and ammonia-spraying grid and blender connect Benitration reactor.

The utility model has the advantages that:

1, denitration, desulfurization all select for use ammonia as main medicament, and the ammonia that denitration is escaped is made desulfurizing agent with the useless ammonia of recovery, reduces operating cost;

2, adjustment is abundant, the assurance device safe operation;

3, concentrate employing ammonia as denitration, desulfurization medicament, use same set of ammonia system device, device is compact, and floor space is little, and cost is low.

4, gathered the advantage of the catalytic-reduction denitrified and ammonia process of desulfurization of SCR, complemented one another, the device configuration rationally has that a whole set of assembling structure is compact, operating cost low, efficient advantages of higher.

Description of drawings

Fig. 1 is the structure diagram of the utility model.

Among Fig. 1: 1, air inlet flue, 2, temperature-sensing valve, 3, thermometer, 4, Benitration reactor; 5, feed flow ammonia pipeline, 6, storage ammonia jar, 7, the ammonia still process jar, 8, the ammonia control valve; 9, ammonia-spraying grid and blender, 10, desulfurization ammoniacal liquor jar, 11, the ammoniacal liquor pump, 12, desulfurization reactor; 13, honeycomb fashion catalyst layer, 14, board-like catalyst layer, 15, the flue of giving vent to anger.

The specific embodiment

Temperature-sensing valve 2 and thermometer 3 are installed on the air inlet flue 1, and air inlet flue 1 is connected with Benitration reactor 4, and temperature-sensing valve 2 connects storage ammonia jar 6; Feed flow ammonia pipeline 5 connects storage ammonia jar 6; Storage ammonia jar 6 connects desulfurization ammoniacal liquor jar 10, and desulfurization ammoniacal liquor jar 10 connects ammoniacal liquor pump 11, and ammoniacal liquor pump 11 connects desulfurization reactor 12; There is honeycomb fashion catalyst layer 13 Benitration reactor 4 inside; Board-like catalyst layer 14 is arranged at honeycomb fashion catalyst layer 13 bottoms, and Benitration reactor 4 connects desulfurization reactor 12, and desulfurization reactor 12 is equipped with the flue 15 of giving vent to anger.Storage ammonia jar 6 connects ammonia still process jar 7, and ammonia still process jar 7 connects ammonia control valve 8, and ammonia control valve 8 connects ammonia-spraying grid and blender 9, and ammonia-spraying grid and blender 9 connect Benitration reactor 4.

Claims

1. integrated medium small boiler catalytic reduction ammonia process of desulfurization denitration complexes comprise air inlet flue (1), temperature-sensing valve (2), thermometer (3), Benitration reactor (4), feed flow ammonia pipeline (5), storage ammonia jar (6), ammonia still process jar (7), ammonia control valve (8), ammonia-spraying grid and blender (9), desulfurization ammoniacal liquor jar (10), ammoniacal liquor pump (11), desulfurization reactor (12), honeycomb fashion catalyst layer (13), board-like catalyst layer (14), the flue of giving vent to anger (15); It is characterized in that: air inlet flue (1) is gone up temperature-sensing valve (2) and thermometer (3) is installed; Air inlet flue (1) is connected with Benitration reactor (4); Temperature-sensing valve (2) connects storage ammonia jar (6); Feed flow ammonia pipeline (5) connects storage ammonia jar (6); Storage ammonia jar (6) connects desulfurization ammoniacal liquor jar 10, and desulfurization ammoniacal liquor jar (10) connects ammoniacal liquor pump (11), and ammoniacal liquor pump (11) connects desulfurization reactor (12); There is honeycomb fashion catalyst layer (13) Benitration reactor (4) inside; Board-like catalyst layer (14) is arranged at honeycomb fashion catalyst layer (13) bottom, and Benitration reactor 4 connects desulfurization reactor (12), and desulfurization reactor (12) is equipped with the flue of giving vent to anger (15); Storage ammonia jar (6) connects ammonia still process jar (7); Ammonia still process jar (7) connects ammonia control valve (8), and ammonia control valve (8) connects ammonia-spraying grid and blender (9), and ammonia-spraying grid and blender (9) connect Benitration reactor (4).