CN112704982A

CN112704982A - Desulfurization dust removal sprays absorption tower

Info

Publication number: CN112704982A
Application number: CN201911014860.XA
Authority: CN
Inventors: 还春祥
Original assignee: Yixing Jinfanda Environmental Protection Technology Co ltd
Current assignee: Yixing Jinfanda Environmental Protection Technology Co ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2021-04-27

Abstract

The invention discloses a desulfurization dust-removal spray absorption tower, which particularly relates to the field of desulfurization and comprises a base, wherein a spray part is arranged on the top surface of the base, a partition plate is arranged at the top end of the spray part, a spray part is arranged at the top end of the partition plate, a dust-removal demister is arranged at the top end of the spray part, an air inlet and an air outlet are respectively arranged at the bottom end of the spray part and the top end of the dust-removal demister, a circulating part and a filtering mechanism are arranged at the bottom ends of the spray part and the spray part, and the output ends of the circulating parts on the right sides of the spray part and the. According to the tail gas spraying device, the circulating part is used for recycling the spraying liquid for multiple times, the circulating pump is used for conveying the spraying liquid sprayed out of the spray head to the spraying head end again, the spraying liquid can be used for circularly spraying and washing tail gas, the utilization rate of the spraying liquid is improved, when pollutants in the spraying liquid are gathered to reach a certain concentration, the pollutants can be recycled in a centralized manner, the tail gas treatment cost is saved, and the environment-friendly and economic benefits are obvious.

Description

Desulfurization dust removal sprays absorption tower

Technical Field

The invention relates to the technical field of desulfurization, in particular to a desulfurization dust removal spray absorption tower.

Background

With the continuous development of Chinese economy, the continuous increase of power demand and the continuous influence of haze, PM2.5 is controlled to mention a bargaining schedule, and local governments and power enterprises put forward the construction or transformation requirements of 'ultra-low emission', 'near zero emission', 'reaching the emission standard of combustion engines', and 'ultra-low emission' technology, so that the sustainable development of ultra-clean emission in the thermal power industry is scientifically guided.

Development and reform Commission for developing coal-electricity energy saving and emission reduction upgrading and transformation action plan (2014-2020) for strictly controlling emission of atmospheric pollutants, wherein newly-built coal-fired power generating units comprise units which are built and project and are brought into national thermal power construction plan, advanced high-efficiency desulfurization, denitration and dust removal facilities are synchronously built, smoke bypass channels are not required to be arranged, the emission concentration of the atmospheric pollutants of the newly-built coal-fired power generating units in the eastern region basically reaches the emission limit value of a gas turbine unit, namely under the condition that the reference oxygen content is 6%, the emission concentrations of smoke dust, sulfur dioxide and nitrogen oxides are respectively not higher than 10 mg/cubic meter, the newly-built units in the middle region are basically close to or reach the emission limit value of the gas turbine unit, the newly-built units in the western region are encouraged to be close to or reach the emission limit value of the gas turbine unit, the, And (4) discharging pollutants such as mercury and arsenic.

In order to solve the above problems, a desulfurization dust removal spray absorption tower is disclosed in patent application publication No. CN105126550A, referring to the attached figure 5 of the specification, in which the emission concentration of atmospheric pollutants of a coal-fired power generating unit through the desulfurization absorption tower substantially reaches the emission limit value of a gas turbine unit, that is, 35 mg/cubic meter of sulfur dioxide under the condition that the reference oxygen content is 6%.

However, the technical scheme still has more defects in actual application;

firstly, because the spray absorption tower still adopts the traditional spray head and spray head structure, the traditional spray heads need to be densely distributed and arranged to achieve the full contact of spray liquid and tail gas, the multi-spray-head structure causes the complicated and intricate pipelines in the spray tower and is difficult to maintain, once a certain section of pipeline is damaged and overhauled, the trouble and the time are consumed, in addition, a large number of pipeline spray heads are installed, the time and the labor are consumed, and the tail gas treatment cost is greatly increased;

two, because this spray absorption tower can not be fine realization is to the recycle who sprays the liquid, other chemical reaction take place easily in the liquid of spraying portion and spraying portion mixes in thick liquid portion, in the in-service use, spray the liquid because unable fully takes place the reaction with tail gas, it only carries out once and sprays in the back gets into the waste liquid promptly, cause very big waste, it sprays the effect poor and leads to spraying the liquid utilization ratio extremely low, need the new liquid that sprays of continuous transport to get into and spray the absorption tower, the high price is unsuitable for long-term use.

Therefore, the desulfurization and dust removal spray absorption tower which is low in cost and simple and convenient to maintain is urgently needed to be provided.

Disclosure of Invention

In order to overcome the above defects in the prior art, embodiments of the present invention provide a desulfurization and dust removal spray absorption tower, wherein a circulation part is used to recycle a spray liquid for many times, and a circulation pump is used to transport the spray liquid sprayed from a spray head to a spray head end again, so that the spray liquid can circularly spray and wash tail gas, thereby improving the utilization rate of the spray liquid, and when pollutants in the spray liquid are gathered to reach a certain concentration, the pollutants can be intensively recycled, thereby saving the tail gas treatment cost, and having significant environmental protection and economic benefits; in addition, the arrangement of the self-rotating spray heads and the porous spray pipes is utilized, so that a large number of pipelines are not required to be laid for installing the spray heads in the spray absorption tower, the spray liquid can be fully contacted with the tail gas by utilizing one or more self-rotating spray heads and the porous spray pipes, the tail gas treatment efficiency is improved, the desulfurization reaction is more thorough, and the maintenance is convenient, so that the problems in the background art are solved.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a desulfurization dust removal sprays absorption tower, includes the base, the top surface fixed mounting of base has spraying portion, spraying portion's top fixed mounting has the partition plate spare, the top fixed mounting of partition plate spare has spraying portion, spraying portion's top fixed mounting has the dust removal defroster, spraying portion's bottom and dust removal defroster's top respectively fixed mounting have air inlet, gas outlet, spraying portion's the bottom fixed mounting on right side have circulation portion, filtering mechanism, spraying portion's the output of the circulation portion on right side respectively fixedly connected with porous spray tube, spin spray head.

In a preferred embodiment, the porous spray pipe comprises a water diversion pipe and a plurality of porous pipes, the plurality of porous pipes are fixedly arranged at the bottom end of the water diversion pipe, and a plurality of round holes are formed in the surface of each porous pipe and are densely distributed.

In a preferred embodiment, from rotating shower head includes communicating pipe, helical blade, rotating head, spiral pipe, helical blade rotates and installs in the inside of communicating pipe, the spiral pipe is hollow structure, the top of rotating head and helical blade's bottom fixed connection, the top of spiral pipe is rotated in the bottom of communicating pipe and is connected, the spiral pipe winding is in the rotating head outside, a plurality of through-holes have been seted up on the spiral pipe surface.

In a preferred embodiment, the circulating part comprises a circulating pump, a three-way pipe, an observation pipe, a gate valve, a connecting pipe and a liquid injection valve, the input end of the circulating pump is fixedly connected with the bottom ends of the spraying part and the spraying part, the output end of the circulating pump is fixedly connected with the left end of the three-way pipe, the top end and the right end of the three-way pipe are respectively fixedly connected with the bottom end of the observation pipe and one end of the liquid injection valve, the top end of the observation pipe is fixedly connected with the bottom end of the gate valve, and the top end of the gate valve is fixedly connected with the porous spraying pipe and the self-rotating spray header.

In a preferred embodiment, the bottom surface of the spraying part is an inclined surface facing to the right, and the partition member is composed of two inclined plates, and the two inclined plates of the partition member are installed in an interactive manner.

In a preferred embodiment, the filter mechanism comprises one-level filter screen and second grade filter screen, the one-level filter screen be the convex surface structure of hemisphere type, the second grade filter screen is spherical surface structure, one-level filter screen aperture is greater than second grade filter screen aperture, the one-level filter screen is located the outside of second grade filter screen.

In a preferred embodiment, the porous spray pipe, the spin spray head, the circulating part, the partition plate part and the filtering mechanism are all made of corrosion-resistant materials.

In a preferred embodiment, a large number of gas-liquid spoilers are installed inside the spraying part and the spraying part, a plurality of through holes are formed in the surfaces of the gas-liquid spoilers, and the opening rate of the gas-liquid spoilers is 45% -50%.

The invention has the technical effects and advantages that:

1. according to the tail gas spraying device, the circulating part is used for recycling the spraying liquid for multiple times, the circulating pump is used for conveying the spraying liquid sprayed out of the spray head to the spraying head end again, the spraying liquid can be used for circularly spraying and washing tail gas, the utilization rate of the spraying liquid is improved, when pollutants in the spraying liquid are gathered to reach a certain concentration, the pollutants can be recycled in a centralized manner, the tail gas treatment cost is saved, and the environment-friendly and economic benefits are remarkable;

2. according to the invention, through the arrangement of the self-rotating spray heads and the porous spray pipes, a large number of pipelines are not required to be laid for installing the spray heads in the spray absorption tower, and the spray liquid can be fully contacted with the tail gas by using one or more self-rotating spray heads and the porous spray pipes, so that the tail gas treatment efficiency is improved, the desulfurization reaction is more thorough, and the maintenance is convenient.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of a porous spray tube structure of the present invention.

FIG. 3 is a schematic view of a spin-on showerhead structure according to the present invention.

FIG. 4 is a schematic view of the circulation part structure of the present invention.

FIG. 5 is a diagram illustrating a structure of a comparison file according to the present invention.

The reference signs are: 1. a base; 2. an air inlet; 3. a spraying section; 4. a porous spray tube; 5. a spraying part; 6. a spin spray head; 7. an air outlet; 8. a dust and mist eliminator; 9. a circulating part; 10. a partition member; 11. a filtering mechanism; 401. a water diversion pipe; 402. a perforated pipe; 601. a communicating pipe; 602. a helical blade; 603. rotating the head; 604. a spiral tube; 901. a circulation pump; 902. a three-way pipe; 903. an observation tube; 904. a gate valve; 905. a connecting pipe; 906. and a liquid injection valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

1-4, including base 1, the top surface fixed mounting of base 1 has spraying portion 3, the top fixed mounting of spraying portion 3 has partition plate spare 10, the top fixed mounting of partition plate spare 10 has spraying portion 5, the top fixed mounting of spraying portion 5 has dust removal defroster 8, there are air inlet 2, gas outlet 7 in the bottom of spraying portion 3 and the top of dust removal defroster 8 fixed mounting respectively, spraying portion 3, the bottom fixed mounting on spraying portion 5 right side has circulation portion 9, filter mechanism 11, spraying portion 3, the output of circulation portion 9 on spraying portion 5 right side fixedly connected with porous spray pipe 4 respectively, spin spray head 6.

As shown in fig. 2, the porous spray pipe 4 includes a water diversion pipe 401 and a porous pipe 402, wherein the porous pipes 402 are fixedly installed at the bottom end of the water diversion pipe 401, and the surface of the porous pipe 402 is provided with a plurality of round holes and is densely distributed.

Like the spin shower head shown in fig. 3, spin shower head 6 includes communicating pipe 601, helical blade 602, rotating head 603, spiral pipe 604, and helical blade 602 rotates and installs in the inside of communicating pipe 601, and spiral pipe 604 is hollow structure, and the top of rotating head 603 and helical blade 602's bottom fixed connection, and the top of spiral pipe 604 rotates in the bottom of communicating pipe 601 to be connected, and the spiral pipe 604 winding is in the rotating head 603 outside, and a plurality of through-holes have been seted up on the spiral pipe 604 surface.

As shown in fig. 4, the circulating part 9 includes a circulating pump 901, a three-way pipe 902, an observation pipe 903, a gate valve 904, a connecting pipe 905 and a liquid injection valve 906, the input end of the circulating pump 901 is fixedly connected with the spraying part 3 and the bottom end of the spraying part 5, the output end of the circulating pump 901 is fixedly connected with the left end of the three-way pipe 902, the top end and the right end of the three-way pipe 902 are respectively fixedly connected with the bottom end of the observation pipe 903 and the one end of the liquid injection valve 906, the top end of the observation pipe 903 is fixedly connected with the bottom end of the gate valve 904, and the top end of the gate valve 904 is fixedly connected with the porous spraying pipe 4.

The implementation mode is specifically as follows: the spraying liquid is recycled for a plurality of times by utilizing the circulating part 9, and the spraying liquid sprayed by the spray head is conveyed to the spraying head end again by utilizing the circulating pump 901, so that the spraying liquid can circularly spray and wash tail gas, the utilization rate of the spraying liquid is improved, and after pollutants in the spraying liquid are gathered to reach a certain concentration, the concentrated recovery treatment can be carried out, so that the tail gas treatment cost is saved, and the environmental protection and economic benefits are obvious; in addition, the arrangement of the self-rotating spray heads 6 and the porous spray pipes 4 is utilized, so that a large number of pipelines are not required to be laid for installing spray heads in the spray absorption tower, the spray liquid can be fully contacted with the tail gas by utilizing one or more self-rotating spray heads 6 and the porous spray pipes 4, the tail gas treatment efficiency is improved, the desulfurization reaction is more thorough, and the maintenance is convenient.

Wherein, the bottom surface of spraying portion 3 is the inclined plane of right side, and baffle piece 10 comprises two swash plates, and two swash plates of baffle piece 10 are interactive installation, prevent that spraying portion 5 reaction liquid from mixing with spraying portion 3 reaction liquid.

Wherein, filtering mechanism 11 comprises one-level filter screen and second grade filter screen, and the one-level filter screen be hemisphere type convex surface structure, and the second grade filter screen is spherical surface structure, and one-level filter screen aperture is greater than second grade filter screen aperture, and the one-level filter screen is located the outside of second grade filter screen, and the one-level filter screen filter area of hemisphere type convex surface structure is bigger and difficult whole jam, extension filter screen life.

The porous spray pipe 4, the spin spray head 6, the circulating part 9, the partition plate 10 and the filtering mechanism 11 are all corrosion-resistant components to prevent corrosion of the reaction solution.

Wherein, a large amount of gas-liquid spoilers are arranged inside the spraying part 3 and the spraying part 5, a plurality of through holes are arranged on the surfaces of the gas-liquid spoilers, the aperture ratio of the gas-liquid spoilers is 45-50%, so that the gas flow velocity in the absorption tower is well and uniformly distributed, and most of the gas flow velocity is in the average flow velocity range.

The working principle of the invention is as follows:

firstly, different spraying liquids are filled in the spraying part 3 and the spraying part 5 through the liquid injection valve 906, tail gas enters the tower from the gas inlet 2, the mist spraying liquid sprayed out of the porous spraying pipe 4 fully reacts with the tail gas when entering the spraying part 3, the tail gas falls to the bottom surface after being filtered by the filtering mechanism 11, the tail gas is pumped to the porous spraying pipe 4 from a new pump by the circulating part 9 to realize circulation, the turbidity degree of the reaction liquid is observed through the observation pipe 903, if the turbidity degree can be changed by closing the gate valve 904, the liquid injection valve 906 is opened to replace the new reaction liquid, the tail gas after the primary reaction enters the spraying part 5 through the partition plate 10 to be subjected to secondary spraying, when the reaction liquid contacts the spiral blade 602, the spiral blade 602 drives the spiral pipe 604 to rotate to achieve the effect of increasing the contact surface of the reaction liquid and the tail gas to fully react, then when the tail gas passes through the dust and mist, and finally, the flue gas escapes from the absorption tower from the gas outlet 7.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a desulfurization dust removal sprays absorption tower, includes base (1), its characterized in that: the utility model discloses a spraying device, including base (1), top surface fixed mounting have spraying portion (3), the top fixed mounting of spraying portion (3) has partition plate spare (10), the top fixed mounting of partition plate spare (10) has spraying portion (5), the top fixed mounting of spraying portion (5) has dust removal defroster (8), the bottom of spraying portion (3) and the top of dust removal defroster (8) are fixed mounting respectively has air inlet (2), gas outlet (7), bottom fixed mounting on spraying portion (3), spraying portion (5) right side has circulation portion (9), filter equipment (11), the output of circulation portion (9) on spraying portion (3), spraying portion (5) right side is fixedly connected with porous spray tube (4), from rotating spray header (6) respectively.

2. The desulfurization dust removal spray absorption tower of claim 1, which is characterized in that: the porous spraying pipe (4) comprises a water distribution pipe (401) and a plurality of porous pipes (402), the plurality of porous pipes (402) are fixedly arranged at the bottom end of the water distribution pipe (401), and the surface of each porous pipe (402) is provided with a plurality of round holes which are densely distributed.

3. The desulfurization dust removal spray absorption tower of claim 1, which is characterized in that: from rotating shower head (6) including communicating pipe (601), helical blade (602), rotating head (603), spiral pipe (604), helical blade (602) rotate and install in the inside of communicating pipe (601), spiral pipe (604) are hollow structure, the top of rotating head (603) and the bottom fixed connection of helical blade (602), the top of spiral pipe (604) is rotated in the bottom of communicating pipe (601) and is connected, spiral pipe (604) winding is in rotating head (603) outside, a plurality of through-holes have been seted up on spiral pipe (604) surface.

4. The desulfurization dust removal spray absorption tower of claim 1, which is characterized in that: the circulating part (9) comprises a circulating pump (901), a three-way pipe (902), an observation pipe (903), a gate valve (904), a connecting pipe (905) and a liquid injection valve (906), the input end of the circulating pump (901) is fixedly connected with the bottom ends of the spraying part (3) and the spraying part (5), the output end of the circulating pump (901) is fixedly connected with the left end of the three-way pipe (902), the top end and the right end of the three-way pipe (902) are fixedly connected with the bottom end of the observation pipe (903) and one end of the liquid injection valve (906) respectively, the top end of the observation pipe (903) is fixedly connected with the bottom end of the gate valve (904), and the top end of the gate valve (904) is fixedly connected with the porous spraying pipe (4) and the spin spray head (6) through the connecting.

5. The desulfurization dust removal spray absorption tower of claim 1, which is characterized in that: the bottom surface of spraying portion (3) is the inclined plane of right side, partition spare (10) comprises two swash plates, two swash plates of partition spare (10) are interactive installation.

6. The desulfurization dust removal spray absorption tower of claim 1, which is characterized in that: filtering mechanism (11) comprises one-level filter screen and second grade filter screen, the one-level filter screen be hemisphere type convex surface structure, the second grade filter screen is spherical surface structure, one-level filter screen aperture is greater than second grade filter screen aperture, the one-level filter screen is located the outside of second grade filter screen.

7. The desulfurization dust removal spray absorption tower of claim 1, which is characterized in that: the porous spray pipe (4), the self-rotating spray head (6), the circulating part (9), the partition plate (10) and the filtering mechanism (11) are all corrosion-resistant components.

8. The desulfurization dust removal spray absorption tower of claim 1, which is characterized in that: a large number of gas-liquid spoilers are arranged inside the spraying part (3) and the spraying part (5), a plurality of through holes are formed in the surfaces of the gas-liquid spoilers, and the opening rate of the gas-liquid spoilers is 45% -50%.