阅读说明：本技术 一种工业固废焚烧炉及烟气处理装置 (Industry is useless burning furnace and flue gas processing apparatus admittedly ) 是由 李�荣 黄术翠 黄慧静 于 2021-10-12 设计创作，主要内容包括：本发明公开了一种工业固废焚烧炉及烟气处理装置,包括依次连接的水冷进料斗、水冷炉排和炉室,所述水冷炉排与炉室之间,设有由膜式水冷壁组成的前拱、后拱及侧墙,所述炉室后装有脱氯塔,后拱上设有上下两组后二次风管,两组之间设置干法脱硫装置,使反应介质与烟气充分扰动、混合,行程延长,使介质反应充分,提高了脱硫效率。通过水冷炉排组织燃烧,避免了常规炉排因热负荷过大而造成的腐蚀、结焦；焚烧炉的前、后拱及左、右侧墙均采用膜式水冷壁结构,极大的增加了受热面积,降低了进入炉室的烟气温度,避免了炉室受热面的高温结焦、腐蚀。(The invention discloses an industrial solid waste incinerator and a flue gas treatment device, which comprises a water-cooling feed hopper, a water-cooling grate and an oven chamber which are sequentially connected, wherein a front arch, a rear arch and side walls which are composed of membrane type water-cooling walls are arranged between the water-cooling grate and the oven chamber, a dechlorination tower is arranged behind the oven chamber, an upper group and a lower group of rear secondary air pipes are arranged on the rear arch, and a dry desulfurization device is arranged between the two groups, so that a reaction medium and flue gas are fully disturbed and mixed, the stroke is prolonged, the medium is fully reacted, and the desulfurization efficiency is improved. The water-cooled grate is used for tissue combustion, so that corrosion and coking caused by overlarge heat load of a conventional grate are avoided; the front and rear arches, the left and right side walls of the incinerator are all of membrane water-cooled wall structures, so that the heating area is greatly increased, the temperature of flue gas entering the furnace chamber is reduced, and high-temperature coking and corrosion of the heating surface of the furnace chamber are avoided.)

1. The industrial solid waste incinerator and flue gas treatment device comprises a water-cooling feed hopper (1), a water-cooling grate (2) and an incinerator chamber (3) which are sequentially connected, and is characterized in that a front arch (4), a rear arch (5) and a side wall (6) which are composed of membrane type water-cooling walls are arranged between the water-cooling grate (2) and the incinerator chamber (3), a dechlorination tower (7) is installed behind the incinerator chamber (3), an upper group of rear secondary air pipes (5-1) and a lower group of rear secondary air pipes (5-1) are arranged on the rear arch (5), and a dry desulfurization device (8) is arranged between the two groups.

2. The incinerator and flue gas treatment device for industrial solid waste according to claim 1, wherein secondary air pipes are disposed at the front arch (4), the rear arch (5) and the side walls (6).

3. The incinerator and flue gas treatment device for industrial solid wastes according to claim 1, wherein the outlet pipe of the furnace chamber (3) is tangentially connected to the lower part of the dechlorination tower (7), so that the flue gas at the outlet of the furnace chamber (3) tangentially enters from the lower part of the dechlorination tower (7), the liquid caustic soda nozzle (9) is tangentially arranged at the upper part of the dechlorination tower (7), and the liquid caustic soda jet flows in a reverse direction with the swirling flow of the flue gas.

4. The industrial solid waste incinerator and flue gas treatment device according to claim 1, wherein flue gas at the outlet of said dechlorination tower (7) is filtered by a primary bag-type dust collector (10) and a secondary denitration catalytic filter bag dust collector (11) in sequence, and then discharged through an activated carbon packed tower (12).

Technical Field

The invention relates to the technical field of boilers and flue gas treatment, in particular to a method for producing steam for steam supply and power generation by an industrial solid waste incinerator and ensuring that the flue gas reaches the standard and is discharged through a proper process system.

Background

With the development of social economy and the continuous improvement of the living standard of urban residents, various living clothing articles such as leathers, needle textiles, plastics and the like, and electronic products such as mobile phones, computers and the like become daily necessities for the residents. In the production and recovery processes of the products, a large amount of waste industrial solid wastes of leather, plastics and rubber are generated, the solid wastes are difficult to degrade in nature and cause serious pollution to the environment, and in order to treat the solid wastes in a reduction, recycling and harmless way, circulating fluidized bed waste incineration power plants are established in many places. In actual operation, however, the requirement on fuel pretreatment facing a circulating fluidized bed is high, and the auger crushing device is easy to block; the heating surface is unreasonably arranged, and coking is serious; the industrial solid waste has high sulfur and chlorine contents (more than dozens of times higher than that of domestic garbage), is easy to generate dioxin, and has the problems of difficult standard of flue gas emission and the like, so that the operation of a power plant is difficult to continue. If the traditional garbage incinerator is adopted for discharging, the heat value of industrial garbage is approximately equal to the heat value of domestic garbage by multiple times, the fire grate can be overheated, the smoke temperature of a furnace chamber is overhigh, the generation amount of dioxin and sulfide is large, the waste water amount of a wet tower is large, hazardous waste substances such as dioxin are contained, and a series of problems such as ineffective treatment cannot be caused.

Disclosure of Invention

In order to solve the defects of the prior art, realize the purposes of fully burning off industrial solid waste, effectively utilizing heat, discharging flue gas and waste water after reaching standards, reducing the blowing-out condition and ensuring long-term stable operation, the invention adopts the following technical scheme:

the industrial solid waste incinerator and flue gas treatment device comprises a water-cooling feed hopper, a water-cooling grate and an incinerator chamber which are sequentially connected, wherein a front arch, a rear arch and side walls which are composed of membrane type water-cooling walls are arranged between the water-cooling grate and the incinerator chamber, and a dechlorination tower is arranged behind the incinerator chamber. The rear arch is provided with an upper group of rear secondary air pipes and a lower group of rear secondary air pipes, and a dry-method desulfurization device is arranged between the two groups of rear secondary air pipes, so that the reaction medium and the flue gas are fully disturbed and mixed, and the stroke is prolonged. The water-cooled grate is used for tissue combustion, so that the grate is cooled in time; the front and rear arches and the left and right side walls of the incinerator are all of membrane water-cooled wall structures, so that the heating area is greatly increased.

Furthermore, secondary air pipes are uniformly arranged at the front arch, the rear arch and the side walls, so that the proportion of secondary air is increased, and the disturbance of smoke is increased.

Furthermore, an outlet pipe of the furnace chamber is tangentially connected to the lower part of the dechlorinating tower, so that flue gas at the outlet of the furnace chamber tangentially enters from the lower part of the dechlorinating tower, liquid caustic soda nozzles are arranged on the upper part of the dechlorinating tower in a tangential circle, and liquid caustic soda jet flows in a reverse direction with the flue gas rotational flow. After the flue gas enters the dechlorinating tower from the lower part in a tangential way, the turbulent mixing is increased due to the opposite rotational flow direction of the liquid caustic soda entering from the upper part in a tangential way, the reaction time is prolonged, and meanwhile, the smoke dust has enough settling space.

Furthermore, the flue gas at the outlet of the dechlorination tower is filtered by a primary bag-type dust collector and a secondary denitration catalytic bag-type dust collector in sequence and then discharged through an active carbon packed tower. The flue gas treatment adopts a two-stage cloth bag, primary dust removal, secondary dust removal and denitration, so that the NOx content and the dust content of the outlet flue gas reach the ultra-low emission degree.

The invention has the advantages and beneficial effects that:

1. aiming at the characteristics of high heat value and low water content of industrial solid waste, the boiler adopts a water-cooled grate to organize combustion. The corrosion and coking caused by the overlarge heat load of the conventional grate are avoided.

2. The front and rear arches, the left and right side walls of the incinerator are all of membrane water-cooled wall structures, so that the heating area is greatly increased, the temperature of flue gas entering the furnace chamber is reduced, and high-temperature coking and corrosion of the heating surface of the furnace chamber are avoided.

3. Secondary air is distributed at the front arch, the rear arch, the left side wall and the right side wall, the proportion of the secondary air is increased, the disturbance of smoke is increased, and the fuel is fully burnt.

4. And a dry desulfurization device is arranged between the rear arch secondary air, so that the reaction medium and the flue gas are fully disturbed and mixed, the stroke is prolonged, the medium is fully reacted, and the desulfurization efficiency is improved.

5. After the flue gas enters the dechlorination tower from the lower part in the tangential direction, the flue gas and the liquid caustic soda entering from the upper part in the tangential direction have opposite rotational flow directions so as to increase the disturbance mixing, prolong the reaction time, maximize the dechlorination effect and ensure that the smoke dust has enough settling space.

6. The flue gas treatment adopts two-stage cloth bag dust removal, wherein a denitration catalytic filter bag is additionally arranged on the two-stage cloth bag dust removal, so that the NOx content and the dust content of the outlet flue gas reach the ultra-low emission degree. The clean flue gas enters the activated carbon packed tower to be adsorbed and removed again, so that the service life of the activated carbon is prolonged due to the cleanness of the flue gas. This flue gas treatment facility has satisfied the function of removing dust, denitration, reducing dioxin, has avoided the SCR denitration to the restriction of flue gas temperature to and adopt the dilemma that the useless sewage of a large amount of dangers of wet column production can't be handled.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic top view of the cross-section A-A, B-B of the present invention.

FIG. 3 is a schematic view of the structure of the flue gas treatment device of the present invention.

In the figure: 1-water-cooled feed hopper, 2-water-cooled grate, 3-furnace chamber, 4-front arch, 4-1-front secondary air pipe, 5-rear arch, 5-1-rear secondary air pipe, 6-side wall, 6-1-side secondary air pipe, 7-dechlorination tower, 8-dry desulphurization unit, 9-liquid caustic soda nozzle, 10-bag dust remover, 11-denitration catalytic filter bag dust remover and 12-active carbon packed tower.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1 and 2, the industrial solid waste incinerator and flue gas treatment device comprises a water-cooling feed hopper 1, a water-cooling grate 2 and a furnace chamber 3, wherein the water-cooling feed hopper 1 is arranged at the front part of the water-cooling grate 2, a front arch 4, a rear arch 5, a left side wall and a right side wall 6 are arranged above the water-cooling grate 2, and the front arch 4, the rear arch 5, the left side wall and the right side wall 6 are all formed by membrane type water-cooling walls. A dechlorination tower 7 is arranged behind the furnace chamber 3.

An upper group of front secondary air pipes 4-1 and a lower group of front secondary air pipes 4-1 are arranged on the front arch 4, an upper group of rear secondary air pipes 5-1 and a lower group of rear secondary air pipes 5-1 are arranged on the rear arch 5, a group of side secondary air pipes 6-1 are respectively arranged on the left side wall 6 and the right side wall 6, and a dry-method desulfurization device 8 is arranged between the two groups of rear secondary air pipes 5-1.

The flue gas at the outlet of the furnace chamber 3 tangentially enters from the lower part of the dechlorinating tower 7. The upper part of the dechlorination tower 7 is provided with a liquid caustic soda nozzle 9, the liquid caustic soda nozzle 9 is arranged in a tangent circle, and liquid caustic soda jet and flue gas cyclone flow in a reverse flow mode.

As shown in fig. 3, the flue gas at the outlet of the dechlorination tower 7 is filtered by a primary bag-type dust collector 10 and a secondary denitration catalytic filter bag-type dust collector 11, and then passes through an active carbon packed tower 12 to adsorb dioxin.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.