CN214115590U

CN214115590U - Slag flushing water tank

Info

Publication number: CN214115590U
Application number: CN202022768408.7U
Authority: CN
Inventors: 陈世然
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2021-09-03
Anticipated expiration: 2030-11-25

Abstract

The utility model discloses a slag flushing water tank, which belongs to the technical field of energy conservation and environmental protection, and comprises a water tank body, wherein the inlet of the water tank body is connected with a granulation tower, and a slag cleaner, a water-water heat exchanger, a filler filtering layer, a spraying layer and a steam-water heat exchanger are sequentially arranged in the water tank body from the bottom to the top; the sluicing basin still includes the steam and receives the device, the steam receive the device with the basin body and/or the granulation tower is connected, the steam receives the device and includes: the absorption shell is internally provided with a packing layer, a spraying layer and a dehydration layer. The utility model discloses a water-water heat exchanger, filler filter layer, spraying layer and vapour-water heat exchanger and the steam of basin internal are received the device and are retrieved the heat that dashes cinder water and steam that the cinder granulation produced jointly high-efficiently comprehensively, retrieve the steam condensate water, and handled harmful gas, protected the environment and the efficient utilization towards cinder water waste heat.

Description

Slag flushing water tank

Technical Field

The utility model relates to an energy-concerving and environment-protective technical field, concretely relates to towards sediment basin.

Background

In blast furnace iron making production, a large amount of waste gas and waste slag are generated along with the production of main product molten iron. The waste gas, namely the coal gas, is fully recycled and utilized, and zero emission is realized. The energy carried by the waste slag, blast furnace slag, is not utilized basically. Separating out high-temperature liquid slag at 1350-1500 ℃ which is difficult to process. At present, the main treatment process of the slag is water quenching granulation in a granulation tower or a punching tank, and molten slag is crushed and refined to be used as various building materials. In the treatment process, a large amount of water resources are consumed, and a large amount of hot water and steam with the temperature of about 90 ℃ are generated; the hot water is cooled by forced ventilation and then is recycled. A large amount of steam containing harmful gases passes through a chimney arranged above the granulating tower/punching box and is discharged to the high altitude under the natural suction force of the chimney; part of steam is diffused on site, so that the smoke in the slag field is diffused; the discharged steam takes away a large amount of heat, losing a large amount of clean water.

The 'dense white smoke' discharged from high altitude becomes a remarkable mark of the blast furnace ironmaking process, the environmental protection is seriously influenced, and in recent years, the environmental protection department has strictly required treatment. The large amount of diffused water vapor carries harmful gases to cover the blast furnace equipment, so that the blast furnace equipment is in a humid water vapor environment containing corrosive media and harmful gases for a long time, and the corrosion of the equipment is accelerated (the corrosion is serious and the speed is high in the range of materials with steel texture structures).

The existing slag flushing water utilizes waste heat, and has the advantages of high investment, large occupied area, blockage, low recovery efficiency and unsatisfactory effect. Diffused steam is not recovered heat and condensed water, and is discharged together with harmful gas, causing pollution, and forming a humid steam environment of blast furnace equipment to accelerate corrosion of the equipment.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a towards sediment basin to solve current towards sediment water waste heat recovery's inefficiency, and steam has caused the pollution, has also accelerated the technical problem of the corruption of equipment.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

according to the embodiment of the utility model, a slag flushing water tank is provided, which comprises a water tank body, wherein the inlet of the water tank body is connected with a granulating tower, and a slag cleaner, a water-water heat exchanger, a filler filtering layer, a spraying layer and a steam-water heat exchanger are sequentially arranged in the water tank body from bottom to top;

the sluicing basin still includes the steam and receives the device, the steam receive the device with the basin body and/or the granulation tower is connected, the steam receives the device and includes: the absorption shell is internally provided with a packing layer, a spraying layer and a dehydration layer.

Furthermore, the number of the steam-water heat exchangers is multiple, and the multiple steam-water heat exchangers are arranged along the vertical direction of the water tank body.

Further, the water tank body further comprises a water collector which is arranged at the bottom of the steam-water heat exchanger.

Furthermore, a plurality of glass steel sheets are arranged in the filler filtering layer.

Further, a mixing layer is further arranged in the absorption shell, a mixing fan is arranged in the mixing layer, and an air inlet is formed in the mixing layer.

Further, when the steam absorbing device is connected with the water tank body, the packing layers are two layers, and the mixing fan is arranged between the adjacent packing layers.

Further, when the steam absorption device is connected with the granulation tower, the mixing fan is positioned between the filler layer and the dehydration layer.

Further, the towards sediment basin still includes harmful gas purification recovery unit, harmful gas purification recovery unit includes: the recycling shell is internally provided with a packing layer, a spraying layer, a dehydration layer and a mixing layer, and a gas pipeline is arranged at an outlet of the recycling shell.

Furthermore, the slag flushing water tank also comprises a condensed water recovery device, wherein the condensed water recovery device comprises a condensed water tank, and the condensed water tank is arranged in the middle or at the tail end of the steam-water heat exchanger.

Furthermore, a filter screen is arranged at the inlet of the water tank body.

The embodiment of the utility model has the following advantage:

the water tank body and the steam absorbing device are arranged, the steam absorbing device is connected with the water tank body and/or the granulation tower, the heat of the slag flushing water and the steam generated by slag flushing granulation is comprehensively and efficiently recovered through the water-water heat exchanger, the filler filtering layer, the spraying layer, the steam-water heat exchanger and the steam absorbing device in the water tank body, the steam condensate water is recovered, harmful gas is treated, the environment is protected, and the waste heat of the slag flushing water is efficiently utilized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic structural view of a slag flushing water tank according to an embodiment of the present invention;

fig. 2 is a schematic view of a part of the structure of a steam absorbing device installed on a water tank body in a slag flushing water tank according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a part of the connection between the granulation tower and the steam absorption device in the slag flushing water tank according to an embodiment of the present invention.

In the figure: 1-granulation tower, 2-filter screen, 4-water tank body, 5-slag remover, 6-water heat exchanger, 7-filler filtering layer, 8-spraying layer, 9-water collector, 10-steam-water heat exchanger, 14-gate, 15-flow guide pipe, 17-steam guide pipe, 18-hot water pool, and 19-condensation water tank.

23-inlet, 24-filler layer, 27-dehydration layer, 28-air inlet valve, 29-mixing fan, 30-pressurizing fan, 31-exhaust valve, 32-mixing layer, 35-outlet chamber, 44-discharge chimney and 56-cut-off valve.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

As shown in fig. 1 to 3, the slag flushing water tank according to the embodiment of the present invention comprises a water tank body 4, wherein an inlet of the water tank body 4 is connected with a granulation tower 1, and a slag remover 5, a water-water heat exchanger 6, a filler filtering layer 7, a spraying layer 8 and a steam-water heat exchanger 10 are sequentially arranged in the water tank body 4 from bottom to top; the slag flushing water tank further comprises a steam absorption device, the steam absorption device is connected with the water tank body 4 and/or the granulation tower 1, and the steam absorption device comprises: and the absorption shell is internally provided with a packing layer 24, a spraying layer 8 and a dehydration layer 27.

Specifically, the slag remover 5 is arranged in the water tank 4 and used for removing the collection, scaling and dirt of the bottom, wall and tube bundle in the water tank 4. The water-water heat exchanger 6 is arranged in a water tank in the normal process flow and is immersed in the slag flushing hot water, so that the normal production, process arrangement and technical requirements are not influenced. And the filler filtering layer 7 is arranged above the slag flushing water, so that impurities are prevented from entering a subsequent treatment process. The spray layer 8 is disposed above the packing layer 24 to flush the packing and tube bundles with clean water or otherwise to keep the packing and tube bundles clean. The water collector 9 is arranged above the spraying layer 8 and below the steam-water heat exchanger 10 to uniformly distribute steam, collect condensed water above and discharge the water to the water tank. The steam-water heat exchanger 10 is arranged in the water tank of the normal process flow and above the water-water heat exchanger 6, so that the normal production and process requirements are not influenced; the number of the steam-water heat exchangers 10 is two, the two steam-water heat exchangers 10 are arranged along the up-down direction of the water tank body 4, and the two steam-water heat exchangers 10 are arranged together.

The water tank body 4 is tightly sealed, the front end is sealed, and the rear end is provided with a water seal; the exhaust end is provided with induced air to guide steam, and negative pressure is formed in the water tank body 4 to generate more steam quantity through secondary evaporation.

The sealing, water sealing and air inducing of the water tank body 4 ensure that the novel water tank does not leak, more steam is evaporated at the same time, and more heat and condensed water are collected. The sealing arrangement avoids slag and water from overflowing and prevents smog from diffusing.

The density and thickness of the filler filter layer 7 are sufficient to prevent the entry of impurities and ensure an unobstructed and smooth passage of steam. Set up glass steel sheet in packing layer 24 and the dehydration layer 27, packing layer 24's material is suitable, density is reasonable, arranges highly rationally, can effectively carry out nature mixing, heat transfer, absorption steam with the water that sprays through to give the high, fast steam cooling of temperature, greatly absorb steam, condense into water. The spraying layer 8 of the steam absorbing device further mixes and cools the escaping steam.

The mixed layer 32+ the dehydration layer 27 of the steam absorption device further condenses the escaped steam, thereby realizing zero emission; if necessary, the mixed refrigerant further cools the steam; the filler adopted by the dehydration layer 27 has reasonable material, density and performance, and reasonable arrangement height, and can effectively dehydrate and collect condensed water.

It should be noted that the steam absorbing device is led out from the terminal or the starting end of the water tank, or is placed at the inlet of the smoke exhaust chimney of the granulation tower 1 (or the punching box), or is placed at the inlet of the smoke exhaust chimney of the rotary drum.

The packing layer 24 is arranged in correspondence with the inlet 23 of the vapor-sorbing device,

further, the number of the steam-water heat exchangers 10 is multiple, and the multiple steam-water heat exchangers 10 are arranged along the vertical direction of the water tank 4.

Further, the water tank body further comprises a water collector 9, and the water collector 9 is arranged at the bottom of the steam-water heat exchanger 10.

Furthermore, a plurality of glass fiber reinforced plastic sheets are arranged in the filler filtering layer 7.

Further, a mixing layer 32 is further arranged in the absorption shell, a mixing fan 29 is arranged in the mixing layer 32, and an air inlet is arranged on the mixing layer 32.

Further, when the steam absorbing device is connected with the water tank 4, the packing layers 24 are two layers, and the mixing fan 29 is arranged between the adjacent packing layers 24. The top of the dewatering layer 27 is an outlet chamber 33.

Further, when the steam absorption device is connected to the granulation tower 1, the mixing fan 29 is located between the filler layer 24 and the dehydration layer 27. The steam absorption device connected with the granulation tower 1 comprises a packing layer 24, a spraying layer 8, a dehydration layer 27, a mixing layer 32, a dehydration layer 27 and a discharge pipe, wherein the discharge pipe is provided with a discharge valve. Forming a waste steam (hot steam for flushing slag and disintegrating slag) digestion system, effectively eliminating white and recovering condensed water. The mixed layer 32 is provided with an exhaust valve 31.

Further, the towards sediment basin still includes harmful gas purification recovery unit, harmful gas purification recovery unit includes: the recycling shell is internally provided with a packing layer 24, a spraying layer 8, a dehydration layer 27 and a mixing layer 32, and a pipeline leading to a gas pipeline is arranged at an outlet of the recycling shell.

The mixed gas is condensed into water drops by collision of the packing layer 24 and the spraying layer 25 through a water collector, and the mixed gas further absorbs steam, purifies harmful gas, exchanges heat, reduces temperature and is condensed into water; the residual mixed gas continuously rises to enter the packing layer 24, and further collision, heat exchange and condensation are carried out to separate out moisture; enters a mixing chamber, is mixed and cooled with external cold medium entering through an air inlet valve 28 and a pipeline, is sent into a packing layer 24 through a mixing fan 29, and is continuously collided, subjected to heat exchange and condensed to separate out moisture. The residual mixed gas is sent into a gas pipeline through an exhaust valve 31 and a booster fan 30, or is directly discharged to a smoke exhaust chimney 44 through a stop valve 36 and a pipeline 37.

The harmful gas purification and recovery device is integrated with the steam absorption device or is arranged immediately after the steam absorption device, and consists of a packing layer 24, a spraying layer 8, a dehydration layer 27, a mixing layer 32, a dehydration layer 27, a pressurizing fan 30 and a gas pipeline. After absorbing the steam, the rest is H-containing₂S、SO₂The harmful gas enters the gas pipeline through the booster fan 30, new heat is generated by combustion, or the harmful gas is directly discharged from a smoke discharge chimney 44 through a stop valve 36 and a pipeline 37.

Further, the slag flushing water tank further comprises a condensed water recovery device, wherein the condensed water recovery device comprises a condensed water tank, and the condensed water tank is arranged in the middle or at the tail end of the steam-water heat exchanger 10.

The condensed water recovery device is arranged in the middle and the tail end of the steam-water heat exchanger 10, and the beginning end and the middle of the steam absorption are used for collecting the condensed water through the water collector 9, concentrating the condensed water, flowing into the condensed water tank, and conveying the condensed water to a user or a storage water tank through a pump. The condensed water with low enough temperature can be circulated to the steam absorbing device for spraying.

Further, a filter screen 2 is arranged at the inlet of the water tank body 4. The slag flushing water mixture enters a novel slag flushing water tank with a composite function through a filter screen 2, and the slag flushing water mixture flows in a channel in the water tank, passes through a 6-water heat exchanger, is adjusted by a gate plate 14 and then enters a rotary drum and a hot water tank 18, so that the heat recovery of slag flushing hot water is completed. The hot water enters the subsequent working procedure and is recycled for repeatedly flushing the slag. In the steam diffusion process, along with heat exchange, condensation and other treatment, precipitated condensed water is collected by the water collector, is recycled to the condensed water tank through the flow guide pipe, and is recycled or sent to other places for use through the circulating water pump. The recovery and treatment of the condensed water are completed.

In the slag flushing water tank provided by the utility model, molten blast furnace slag forms a large amount of slag-water mixture, namely hot water and steam after water quenching; hot water is removed from a slag flushing water tank and separated by a rotary drum; the steam is diffused in the water tank and the smoke exhaust chimney and is discharged through the chimney; the steam fills the space in which the hot water and steam can flow and spread around. The smoke in the slag field, the slag flushing area and the upper part of the blast furnace is diffused. Comprises the following processing process flows:

the water-water heat exchanger 6 is arranged in a slag flushing water runner of a novel slag flushing water tank and is soaked in hot water of the runner for heat exchange;

and the steam-water heat exchanger 10 is provided with slag flushing water of a novel slag flushing water tank, a position above the water-water heat exchanger 6 and an inlet of a discharge chimney 44 of the granulation tower 1/flushing box, so that local heat exchange and condensed water recovery are realized. A shut-off valve 56 is provided to shut off direct steam venting.

The steam absorbing device and the harmful gas purifying and recovering device are arranged at the tail end leading-out position of the slag flushing water tank, a chimney of the granulating tower 1/flushing box, a drum chimney and a hot water pool chimney (chimney inlet), and are used for absorbing and removing white escaping steam, purifying harmful gas and recovering the harmful gas.

The imported cold medium is subjected to combined heat exchange through the first part, the second part and the small part in sequence according to the target requirement, and heat exchange, heating and heat recovery are completed.

And fifthly, the escaped steam and gas pass through the three steps in the discharge process, so that heat exchange, condensation, absorption and white elimination are completed, and the condensed water is recovered.

And synchronously, the purification and recovery of harmful gas are completed.

Sixthly, a sealed water tank is used for ensuring that heat and clean water are recovered as much as possible and ensuring that slag and water do not overflow. After the steam gas mixture passing through the water tank (or the outlet heat exchanger of the granulating tower 1/punching box) enters the steam absorption device, clean water is further condensed and recovered, so that the effect of eliminating white is achieved, and meanwhile, the mixed gas containing harmful gas is dehydrated and discharged to a gas pipeline.

The condensed water recovered is sent to a storage tank or produced as clean water for production, and is recycled on site as appropriate.

The utility model provides a slag flushing water tank which recovers heat and clean water as much as possible, eliminates 'white' and eliminates 'poison' -recovers harmful gas for recycling, utilizes energy-saving and environment-friendly methods and technologies, replaces or improves iron-making production process links and parts thereof, utilizes the characteristics and space of the water tank to manufacture a functional composite device, not only maintains the original functions and ensures continuous production without influencing production, but also recovers a large amount of heat to contribute to heating and heating cold-state media in the necessary process; recovering steam condensate water, namely clean water; the 'dense white smoke' for eliminating 'smoke turning', namely 'white feather' for eliminating current environmental protection requirements; the harmful gas, namely combustible gas is recycled to enter a coal gas system for reutilization; and the water vapor containing harmful gases is removed to moisten the environment, so that the corrosion of equipment is reduced.

The water slag tank is a necessary production process link for iron-making production; in the process, the novel slag flushing water tank with a composite function replaces the existing slag flushing water tank, or the novel slag flushing water tank is placed in the existing slag flushing water tank; or the utility model is arranged in a chimney behind the granulation tower. The utility model comprises a novel slag flushing water tank with a compound function (or the utility model discloses put into the present slag flushing water tank and form the novel slag flushing water tank with a compound function, which comprises a water tank body, a slag cleaner, a water-water heat exchanger, a filler filter layer, a spraying layer, a water collector, a steam-water heat exchanger) and an attached steam absorbing device, a harmful gas purifying and recycling device and a condensed water recycling device. The first and last ends of the utility model are kept unchanged in the original process connection, and only need to be properly adjusted to ensure the realization of the described functions.

The utility model discloses basically all retrieve the steam heat that the cinder of dashing granulation produced to retrieve its condensate water, effectively realize the environmental protection effect of "disappearing white". The utility model discloses utilize technology characteristics, utilize the space in the interest of leading, to towards the whole, whole absorption heat transfer of sediment water heat, retrieve the heat as much as possible. The utility model discloses an adopt, realize towards the whole heat transfer cooling of cinder water, can partly cancel towards cinder water cooling tower cooling back or cancel cooling tower and its cooling back entirely, practice thrift a large amount of construction investment and working costs. Fourth the utility model discloses harmful gas that can hedge slag granulation and produce like H₂、SO₂、H₂S, etc. are purified,And the recovery meets the environmental protection treatment requirement of zero emission, and the recovered harmful gas is used as fuel and sent into a gas system. The utility model discloses fifthly greatly improved towards the environment that forms the diffuse moist vapor of smog, harmful gas in the sediment in-process, eliminated such unfavorable environment basically, played effective effect to the blast furnace equipment anticorrosion. Sixthly, the utility model is suitable for newly built engineering, is applicable to the upgrading transformation of current production system equally.

The utility model provides an among the sluicing basin, be provided with water trough body 4 and steam and receive the device, steam receive the device with water trough body 4 and/or granulation tower 1 connects, through water-water heat exchanger 6 in the water trough body 4, filler filter layer 7, spray layer 8 and vapour-water heat exchanger 10 and steam and receive the device and carry out comprehensive high efficiency ground to the heat of sluicing water and steam that the slag granulation produced jointly, retrieves the steam condensate water, and has handled harmful gas, has protected the environment and the efficient utilization of sluicing water waste heat.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A slag flushing water tank comprises a water tank body (4), wherein an inlet of the water tank body (4) is connected with a granulating tower (1), and is characterized in that a slag remover (5), a water-water heat exchanger (6), a filler filtering layer (7), a spraying layer (8) and a steam-water heat exchanger (10) are sequentially arranged in the water tank body (4) from bottom to top;

the slag flushing water tank further comprises a steam absorption device, the steam absorption device is connected with the water tank body (4) and/or the granulation tower (1), and the steam absorption device comprises: the absorption shell is internally provided with a packing layer (24), a spraying layer (8) and a dehydration layer (27).

2. The slag flushing trough according to claim 1, wherein the number of the steam-water heat exchangers (10) is multiple, and the multiple steam-water heat exchangers (10) are arranged along the vertical direction of the trough body (4).

3. The sluicing trough according to claim 1, wherein the trough body (4) further comprises a water collector (9), and the water collector (9) is arranged at the bottom of the steam-water heat exchanger (10).

4. The slag flushing trough according to claim 1, wherein a plurality of glass fiber reinforced plastic sheets are arranged in the filler filter layer (7).

5. The slag flushing water tank as claimed in claim 1, wherein a mixing layer (32) is further arranged in the absorption shell, a mixing fan (29) is arranged in the mixing layer (32), and an air inlet is arranged on the mixing layer (32).

6. The slag flushing water tank as claimed in claim 5, wherein when the steam absorbing device is connected with the water tank body (4), the filler layers (24) are two layers, and the mixing fan (29) is arranged between the adjacent filler layers (24).

7. The sluicing trough according to claim 5, characterised in that the mixing fan (29) is located between the packing layer (24) and the dewatering layer (27) when the steam absorption device is connected to the granulation tower (1).

8. The sluicing flume of claim 1, further comprising a harmful gas purification and recovery device, the harmful gas purification and recovery device comprising: the recycling shell is internally provided with a packing layer (24), a spraying layer (8), a dehydration layer (27) and a mixing layer (32), and a pipeline is arranged at an outlet of the recycling shell.

9. The sluicing trough according to claim 1, further comprising a condensate recovery device comprising a condensate tank disposed at a middle or a tail end of the steam-water heat exchanger (10).

10. The slag flushing trough according to claim 1, wherein a filter screen (2) is arranged at the inlet of the trough body (4).