CN210717491U

CN210717491U - Boiler continuous drainage multistage depressurization, expansion, purification and recovery equipment

Info

Publication number: CN210717491U
Application number: CN201921816474.8U
Authority: CN
Inventors: 范佳冰; 薛江琴; 范飞标
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-06-09
Anticipated expiration: 2029-10-25

Abstract

The utility model relates to the technical field of continuous blowdown flash tank, in particular to a boiler continuous drainage multistage depressurization flash purification recovery device, which comprises a tank body, wherein one end of the tank body is provided with a steam inlet, and the other end of the tank body is provided with a steam outlet; install first mounting panel on the box roof, first mounting panel links to each other with the one end of filter screen, install impurity in the box of filter screen below and collect the mechanism, there is the clearance between the one end that first mounting panel was kept away from to the filter screen and the impurity collection mechanism. The utility model discloses the setting of filter screen can be got rid of the impurity that mixes in the steam, reduces and forms the dirt in pipeline inside, improves the recycle ratio of used heat.

Description

Boiler continuous drainage multistage depressurization, expansion, purification and recovery equipment

Technical Field

The utility model belongs to the technical field of the technique of continuous blowdown flash tank and specifically relates to a boiler is multistage step-down dilatation purification recovery plant even discharges water.

Background

The continuous blowdown expander is also called continuous blowdown expander, is connected with the continuous blowdown port of the boiler, is used for carrying out the continuous blowdown decompression and expansion of the boiler, and the blowdown water is separated into secondary steam and waste hot water in the continuous blowdown expander through adiabatic expansion, and is subjected to the expansion, decompression and heat exchange in the expander, then is discharged, and the secondary steam is led out by a special pipeline, and the waste hot water is automatically discharged through a floating ball liquid level valve or an overflow regulating valve, so that the heat energy can be recycled.

The invention patent with publication number CN103574586A discloses a multi-stage pressure-reducing, capacity-expanding and vaporizing device for steam pocket continuous-discharge wastewater, which comprises a tank body, a primary diffusion barrel, a secondary diffusion barrel, a tertiary diffusion barrel, a nozzle and the like, wherein the primary diffusion barrel, the secondary diffusion barrel, the tertiary diffusion barrel and the nozzle are arranged in the tank body; wherein, jar body top is equipped with the water inlet, and the bottom of water inlet links to each other with the big footpath mouth of nozzle, and the path mouth of the nozzle other end passes through the diffuser pipe and links to each other with the bung hole of one-level diffusion bucket, and second grade diffusion bucket, tertiary diffusion bucket overlap in proper order are established on one-level diffusion bucket, all are equipped with a plurality of diffusion hole on the above-mentioned three diffusion bucket, and the bottom of the above-mentioned jar body further is equipped with a steam vent for the discharge of jar internal steam.

The invention only converts the waste water discharged from the boiler steam drum into low-temperature saturated steam through multi-stage isothermal pressure reduction, thereby recycling the waste heat. However, because the boiler blow-off is to discharge part of the boiler water from the position where the saline-alkali concentration of the boiler water is the highest so as to reduce the salt content, the alkali content and the silicate content of the boiler water and the slag content in a suspended state, secondary steam formed by the continuous blow-off flash tank also contains impurities with high salt content, and the impurities can form dirt inside the device and the conveying pipeline when passing through the decompression expansion vaporizing device and the steam conveying pipeline, and the generation of the dirt directly influences the normal use of the decompression expansion vaporizing device, thereby influencing the recovery and utilization rate of waste heat.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a boiler is multistage decompression dilatation purification recovery plant even discharges water, and the setting of filter screen can be got rid of the impurity of mixing in the steam, reduces and forms the dirt in pipeline inside, improves the recycle ratio of used heat.

The above technical purpose of the present invention can be achieved by the following technical solutions: a boiler continuous drainage multistage depressurization, expansion, purification and recovery device comprises a box body, wherein one end of the box body is provided with a steam inlet, and the other end of the box body is provided with a steam outlet; install first mounting panel on the box roof, first mounting panel links to each other with the one end of filter screen, install impurity in the box of filter screen below and collect the mechanism, there is the clearance between the one end that first mounting panel was kept away from to the filter screen and the impurity collection mechanism.

By adopting the technical scheme, when the purification and recovery equipment is used, steam mixed with impurities flows in from the steam inlet of the box body, and flows out from the air outlet after being filtered by the filter screen, and the filter screen can filter and remove the impurities mixed in the steam; the impurities filtered by the filter screen fall into the impurity collecting mechanism. Because there is the clearance between the one end that the first mounting panel was kept away from to the filter screen and the impurity collection mechanism, consequently not only can enlarge the flow area of steam, can be convenient for collect storage impurity moreover to improve equipment's practicality.

The utility model discloses a further set up to: the impurity collecting mechanism comprises a second mounting plate, the bottom wall of the box body right below the first mounting plate is provided with the second mounting plate, and a gap is formed between the second mounting plate and the filter screen; the utility model discloses a steam outlet, including the first mounting panel, the second mounting panel is close to and installs the ascending impurity guide plate of slope on the lateral wall of steam air inlet one side, install impurity isolation barrier on the second mounting panel is close to the box diapire of steam air outlet one side, form impurity storage inner chamber between impurity isolation barrier and the second mounting panel.

By adopting the technical scheme, when steam passes through the filter screen, impurities mixed in the steam are blocked at one side of the air inlet of the filter screen by the filter screen when encountering the filter screen, the impurities can fall along the filter screen due to the gravity of the impurities, and the impurities fall to the impurity guide plate in the falling process; because there is the clearance between filter screen and the second mounting panel, consequently impurity falls into along the impurity guide plate and stores in impurity storage inner chamber.

The utility model discloses a further set up to: and a first steam flow guide plate inclining downwards towards the steam outlet is arranged on the side wall of one side of the first mounting plate, which is close to the steam outlet.

Through adopting above-mentioned technical scheme, the setting of first steam drainage plate can lead the steam through the filter screen to make steam can concentrate loop through a plurality of filter screens in the box, thereby improve the filter effect.

The utility model discloses a further set up to: and a second steam flow guide plate inclining upwards towards the steam outlet is arranged on the side wall of the impurity isolation baffle plate close to one side of the steam outlet.

Through adopting above-mentioned technical scheme, the setting of second steam drainage plate can lead the steam through the filter screen to make steam can concentrate loop through a plurality of filter screens in the box, thereby improve the filter effect.

Simultaneously, even steam gets into impurity storage inner chamber, the impurity that the steam of backward flow was taken out receives blockking of second steam flow guiding plate also can reduce the taking out of impurity to guarantee the edulcoration effect.

The utility model discloses a further set up to: and a back flushing pipe is arranged on the top wall of the box body, which is close to one side of the steam inlet, of the first mounting plate, and the back flushing pipe is positioned right above the impurity guide plate.

Through adopting above-mentioned technical scheme, when impurity blocks up between filter screen and the second mounting panel, or impurity inlays when on the filter screen, can close second purifier's air inlet, then open the recoil pipe and make the recoil pipe switch on the water source outside the box, utilize the recoil pipe water spray to wash the impurity of jam to make the impurity of jam fall into the storage at impurity storage intracavity.

The utility model discloses a further set up to: and the filter screen is coated with a protective layer.

Through adopting above-mentioned technical scheme, the setting of protective layer reduces impurity and adheres to and blocks up the filter screen, and impurity adheres to and blocks up the area of circulation that can direct influence steam pass through the filter screen on the filter screen, is unfavorable for the impurity clearance in later stage moreover.

The utility model discloses a further set up to: the filter screen is kept away from and is installed the decurrent impurity drainage plate of slope on one side of first mounting panel, impurity drainage plate and impurity guide plate parallel arrangement.

Through adopting above-mentioned technical scheme, impurity drainage plate's setting can make impurity fall into to impurity storage inner chamber as far as possible, and reduces the clearance that exists between filter screen and the impurity guide plate and takes impurity away from the probability of impurity storage inner chamber because of the flow of steam.

To sum up, the utility model discloses a beneficial technological effect does:

(1) the arrangement of the filter screen can remove impurities mixed in the steam, reduce the formation of dirt in the conveying pipeline and improve the recovery utilization rate of waste heat;

(2) impurity collection mechanism can play the effect of collecting storage impurity, and reduces the steam of backward flow simultaneously and takes impurity away from impurity collection mechanism's probability, guarantees the edulcoration effect.

Drawings

Fig. 1 is a schematic structural diagram of the purification and recovery device of the present invention.

Reference numerals: 21. a box body; 22. a first mounting plate; 23. a second mounting plate; 24. a filter screen; 25. an impurity flow guide plate; 26. an impurity isolation baffle; 27. back flushing the pipe; 28. a first steam conduction plate; 29. a second steam conduction plate; 30. impurity drainage plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a boiler is multistage step-down dilatation purification recovery plant of drainage even, including box 21, be provided with in the box 21 and filter the inner chamber, the steam air inlet has been seted up to the one end of box 21, and the steam gas outlet has been seted up to the other end of box 21, filters the inner chamber and communicates with steam air inlet and steam gas outlet respectively.

Install the first mounting panel 22 that the polylith is parallel to each other on the box 21 roof, every first mounting panel 22 all links to each other with the filter screen 24 one end that corresponds, installs impurity collection mechanism in the box 21 of filter screen 24 below.

The impurity collecting mechanism includes a second mounting plate 23 located directly below the first mounting plate 22, and the second mounting plate 23 is mounted on the bottom wall of the case 21. There is a gap between the second mounting plate 23 and the end of the filter screen 24 remote from the first mounting plate 22. The second mounting panel 23 is close to and installs the ascending impurity guide plate 25 of slope on the lateral wall of steam air inlet one side, and the second mounting panel 23 is close to and installs impurity isolation barrier 26 on the 21 diapire of box on one side of the steam gas outlet, forms impurity storage inner chamber between impurity isolation barrier 26 and the second mounting panel 23. One side of the filter screen 24, which is far away from the first mounting plate 22, is provided with an impurity flow guiding plate 30 which inclines downwards, and the impurity flow guiding plate 30 and the impurity flow guiding plate 25 are arranged in parallel.

A first steam guide plate 28 which inclines downwards towards one side of the steam outlet is arranged on the side wall of the first mounting plate 22 close to one side of the steam outlet. A second steam guide plate 29 inclined upward toward the steam outlet side is mounted on the side wall of the impurity isolation baffle 26 on the side close to the steam outlet.

A back flushing pipe 27 is arranged on the top wall of the box body 21, which is close to one side of the steam inlet, of the first mounting plate 22, and one end of the back flushing pipe 27 extends out of the box body 21 and is communicated with a water source outside the box body 21; the back flushing pipe 27 is positioned right above the impurity guide plate 25.

The filter screen 24 is coated with a protective layer. The protective layer comprises an outer layer and an inner layer, and the raw materials of the outer layer comprise the following components in parts by weight:

40 parts of organic silicon resin;

2 parts of a silane coupling agent;

1.5 parts of aluminum hydroxide colloid;

0.7 part of graphite powder;

the inner layer comprises the following raw materials in parts by weight:

0.7 part of metallic zinc powder;

3 parts of polyepoxysuccinic acid;

and 35 parts of epoxy resin.

The outer layer of the scale synthesis and inhibition layer adopts an organic silicon resin base layer, and is coated and bonded by adding a silane coupling agent auxiliary agent, the organic silicon resin has hydrophobicity, the water contact angle is large, so that the adhesive force of the waste water in a steam-water mixed state discharged by a boiler on the surface of a conveying pipeline is reduced, the rolling of a water medium on the surface of the coating is accelerated due to the large contact angle, and scale salt crystals and dirt are difficult to adhere to the surface of the coating under the shearing force of the flowing water medium. Still add aluminium hydroxide colloid and graphite powder in the skin, the high temperature resistant ability of coating has been improved in the interpolation of aluminium hydroxide colloid, and the interpolation of graphite powder makes the wearability of coating obtain certain improvement, makes the solid dregs thing of suspension that has in the boiler water of boiler exhaust reduce the wearing and tearing of pipeline to the striking of pipeline inner wall, improves the outer guard life of compound dirt blocking layer.

The inner layer of the composite scale inhibition layer is coated by adopting an epoxy resin base layer, the doped zinc powder has an effect of improving the strength of the epoxy coating, polyepoxysuccinic acid is doped, the polyepoxysuccinic acid is a scale inhibitor with double effects of scale inhibition and corrosion inhibition, and when the outer layer is damaged, the polyepoxysuccinic acid in the inner layer can play a role in scale inhibition on calcium sulfate scale. On the other hand, after the outer layer is abraded, the zinc powder is very easy to generate galvanic corrosion reaction with the graphite powder in the outer layer, so that the zinc in the zinc powder is changed into zinc ions, the polyepoxysuccinic acid has a good chelating effect, part of the polyepoxysuccinic acid chelates and adsorbs the zinc ions, the inner layer is provided with more metal ions, the metal ions have certain electrostatic repulsion to the metal ions scaling in the pipeline, such as calcium ions, magnesium ions and the like, the metal ions of the scaling salt are not easy to adhere to the inner wall of the pipeline, and the scale inhibition service life of the scale inhibition coating after the outer layer is damaged is prolonged.

When the multi-stage depressurization, expansion, purification and recovery equipment for continuous drainage of the boiler is used, steam mixed with impurities flows in from the air inlet of the box body 21, flows out from the air outlet of the box body 21 and sequentially passes through the filter screen 24 arranged in the box body 21. While passing through the filter mesh 24, the steam passes through the filter mesh 24, and impurities mixed in the steam are filtered by the filter mesh 24. Filtered impurity glides along filter screen 24, drops to impurity guide plate 25 on, and the impurity that drops collects and saves in impurity storage inner chamber along impurity guide plate 25 landing.

When the filter screen 24 or the gap between the filter screen 24 and the impurity guide plate 25 is blocked by the impurities, the steam inlet and the steam outlet of the box body 21 are closed. The back flushing pipe 27 is connected with an external water source, and the high-pressure water sprayed by the back flushing pipe 27 is used for washing the filter screen 24 or the gap between the filter screen 24 and the impurity guide plate 25 at high pressure. The clogged impurities are washed by high-pressure water, so that the impurities can be washed and dropped.

This embodiment a boiler even multistage decompression dilatation purification recovery plant of drainage, seted up row's miscellaneous mouth on box 21 of impurity storage inner chamber, be convenient for the discharge of impurity. A drain port is also provided in the tank 21 to facilitate discharge of backwash water.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A boiler continuous drainage multistage depressurization, expansion, purification and recovery device comprises a box body (21), wherein one end of the box body (21) is provided with a steam inlet, and the other end of the box body (21) is provided with a steam outlet; the method is characterized in that: install first mounting panel (22) on box (21) roof, first mounting panel (22) link to each other with the one end of filter screen (24), install impurity collection mechanism in box (21) of filter screen (24) below, there is the clearance between the one end that first mounting panel (22) were kept away from in filter screen (24) and the impurity collection mechanism.

2. The boiler continuous-drainage multistage pressure-reduction capacity-expansion purification recovery device according to claim 1, characterized in that: the impurity collecting mechanism comprises a second mounting plate (23), the bottom wall of the box body (21) right below the first mounting plate (22) is provided with the second mounting plate (23), and a gap is formed between the second mounting plate (23) and the filter screen (24); install ascending impurity guide plate (25) of slope on the lateral wall that second mounting panel (23) are close to steam air inlet one side, install impurity isolation barrier (26) on second mounting panel (23) are close to box (21) diapire of steam gas outlet one side, form impurity storage inner chamber between impurity isolation barrier (26) and second mounting panel (23).

3. The boiler continuous-drainage multistage pressure-reduction capacity-expansion purification recovery device according to claim 2, characterized in that: and a first steam flow guide plate (28) which inclines downwards towards the steam outlet is arranged on the side wall of the first mounting plate (22) close to one side of the steam outlet.

4. The boiler continuous-drainage multistage pressure-reduction capacity-expansion purification recovery device according to claim 2, characterized in that: and a second steam flow guide plate (29) inclining upwards towards the steam outlet side is arranged on the side wall of the impurity isolation baffle (26) close to the steam outlet side.

5. The boiler continuous-drainage multistage pressure-reduction capacity-expansion purification recovery device according to claim 1, characterized in that: and a back-flushing pipe (27) is arranged on the top wall of the box body (21) on one side, close to the steam inlet, of the first mounting plate (22), and the back-flushing pipe (27) is positioned right above the impurity guide plate (25).

6. The boiler continuous-drainage multistage pressure-reduction capacity-expansion purification recovery device according to claim 1, characterized in that: and a protective layer is coated on the filter screen (24).

7. The boiler continuous-drainage multistage pressure-reduction capacity-expansion purification recovery device according to claim 1, characterized in that: the impurity drainage plate (30) that inclines downwards is installed on one side of first mounting panel (22) is kept away from in filter screen (24), impurity drainage plate (30) and impurity guide plate (25) parallel arrangement.