CN201121178Y

CN201121178Y - Coke quenching tower vapor recovery unit

Info

Publication number: CN201121178Y
Application number: CNU2007201738850U
Authority: CN
Inventors: 张基忠
Original assignee: BEIJING HOTTECH ENERGY TECHNOLOGY Co Ltd
Current assignee: BEIJING NUCLEAR TAISI BENSI TECHNOLOGY SERVICE Co Ltd
Priority date: 2007-10-31
Filing date: 2007-10-31
Publication date: 2008-09-24
Anticipated expiration: 2017-10-31

Abstract

The utility model relates to a vapor-recovery device of a coke quenching tower. The coke quenching tower comprises a water spraying coke quenching section and an emptying smoke duct, wherein, the water spraying coke quenching section is provided with a coke quenching water spraying device. The vapor-recovery device is characterized in that the bottom part of the water spraying coke quenching section is formed into a relatively enclosed space, the coke quenching tower vapor-recovery device comprises a cooling absorption device arranged between the water spraying coke quenching section and the emptying smoke duct of the coke quenching tower and formed into a cooling absorption section in the coke quenching tower. The utility model can effectively recycle vapor generated during the process of coke quenching, and avoid the huge waste of water resource.

Description

Coke quenching tower vapor recovery device

Technical Field

The utility model relates to a vapor recovery device, in particular to a coke quenching tower vapor recovery device for recovering vapor generated in the coke quenching process in the industrial coking process.

Background

The coke is an important raw material for industrial production in China, and is especially one of essential secondary energy raw materials for metallurgical industry. According to statistics, the current coke production amount of China is in the top of the world. In the industrial coking process, after red coke is pushed out of a coke oven, the coke is extinguished to prevent the coke from being continuously oxidized and combusted in the atmosphere; secondly, rapidly cooling to form the coke; thirdly, the powder on the surface of the coke is washed to ensure the quality of the coke and the qualified moisture content of the coke. At present, coking enterprises mostly adopt a wet quenching technology, so a large amount of cooling water is needed to be sprayed for quenching. Meanwhile, in order to save water, circulating water is mostly adopted for spraying and quenching coke.

The existing quenching devices generally consist of:

1) a coke quenching tower with the upper part directly communicated with the atmosphere and the lower part opened and paved with a track for the coke quenching car to go in and out;

2) a water spraying device;

3) quenching car;

4) a circulating water tank;

5) water pump and control mechanism etc..

The working process is as follows: after red coke is pushed into the coke quenching car from the furnace, the red coke is pushed by the locomotive along the rail to enter the lower part of the coke quenching tower, and the water spraying device instantly sprays a large amount of water to the red coke so as to rapidly extinguish the coke. However, when the water contacts red coke with a temperature as high as more than one thousand degrees, the water is instantaneously vaporized by heat absorption, and a large amount of hot rising steam gas mass is generated. The large amount of steam produced by the method is not recycled, and the steam is emptied, so that waste of water resources and environmental pollution are caused. According to statistics, about 0.5 ton of water is generally consumed by enterprises for producing one ton of coke at present, all coke quenching water is emptied through a coke quenching tower in a steam form, and although the coke quenching water left after spraying is returned to a circulating water tank through a drainage ditch and can be reused, the moisture contained in the emptied steam cannot be recovered.

Today, water and energy conservation are important for the whole society, and how to recover the discharged steam, save a large amount of water resources and protect the environment is really an urgent important subject.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: provides a vapor recovery device of a coke quenching tower, which is used for recovering vapor generated in the coke quenching process and avoiding huge waste of water resources.

The technical solution of the utility model is that: the utility model provides a coke quenching tower vapor recovery unit, the coke quenching tower is including water spray quenching section and evacuation flue, the water spray quenching section is equipped with quenching water jet equipment, water spray quenching section bottom forms into relatively inclosed space, coke quenching tower vapor recovery unit constitutes the cooling absorption section including setting up the cooling absorbing device between the water spray quenching section and the evacuation flue of this coke quenching tower in this coke quenching tower.

The utility model discloses a characteristics and advantage are: in industry coking's quenching process, the high temperature steam gas that quenching water and red coke instantaneous contact produced, steam is at ascending in-process, process the utility model discloses a quenching tower steam recovery unit handles the back, because staggered arrangement's water jet equipment for steam flow tortuous rises through the water spray of quenching, with the cooling water after fully exchanging the heat, the temperature reduces, a large amount of condensate water that obtains after the condensation can be retrieved through gravity separation, and then reuse, the fine coke dust of polluted environment also is separated out, other insoluble gas then discharges through quenching tower upper portion evacuation flue, therefore, the waste of water resource has been avoided, and the pollution to the environment has been reduced.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,

fig. 1 is a schematic structural diagram of an embodiment of a vapor recovery device of a quenching tower of the present invention.

The reference numbers illustrate:

1. coke quenching car 2, sealing door 3, water spray coke quenching section

4. Water sprayer 5, cooling absorption section 6, backwater guide plate

7. Circulating water pool 8, water pump 9, water drain pipe

10. Evacuation flue 11, cooling water spray assembly 110 and water retaining part

60. Diversion water receiving plate 601 water retaining part

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of the operation principle of an embodiment of the vapor recovery device of the quenching tower of the present invention. As shown in the figure, the utility model provides a coke quenching tower steam recovery device, the coke quenching tower comprises a water spraying coke quenching section 3 and an evacuation flue 10, the water spraying coke quenching section 3 is provided with a coke quenching water sprayer 4, and the bottom of the water spraying coke quenching section is formed into a relatively airtight space, the coke quenching tower steam recovery device of the utility model comprises a cooling absorption device arranged between the water spraying coke quenching section 3 and the evacuation flue 10 of the coke quenching tower, and a cooling absorption section 5 is formed in the coke quenching tower; the evacuation flue is in line with an existing quench tower for discharging remaining insoluble gases.

As shown in figure 1, the coke quenching tower vapor recovery device of the utility model also comprises a closed door 2 arranged at the inlet and outlet of the coke quenching car 1 at the bottom of the water spraying coke quenching section 3, and the closed door 2 isolates the channel between the water spraying coke quenching section 3 and the outside air to form a relatively closed space at the bottom of the coke quenching tower.

The cooling absorption device comprises cooling water spray assemblies 11 arranged on the inner wall of the quenching tower, as shown in fig. 1, a plurality of layers of cooling water spray assemblies 11 are arranged in the embodiment, the shapes of the cooling water spray assemblies 11 are matched with the local cross-sectional shapes of the cooling absorption sections of the quenching tower, and the cooling water spray assemblies 11 of each layer are arranged in a staggered mode to form a zigzag channel, so that steam heat is absorbed in cooling and condensed into condensed water.

In a specific embodiment of the present invention, five layers of cooling water spray assemblies 11 are provided, and each layer of cooling water spray assemblies 11 is connected to the circulating water tank 7 through a water pump 8; the cross section of the cooling absorption section 5 of the coke quenching tower is rectangular, the shape of the cooling water spray assembly 11 is matched with the rectangular cross section, the width is equal, and the length is slightly smaller, so that three surfaces of the cooling water spray assembly 11 can be arranged on the inner wall of the coke quenching tower, and a notch is formed at the unfixed end to form a channel for steam circulation; moreover, the cooling water spray assemblies are arranged in a staggered mode, as shown in figure 1, in the cooling water spray assembly with the five-layer structure, the free ends of three layers are opposite to the left tower wall, and the free ends of the other two layers arranged between the three layers are opposite to the right tower wall, so that a tortuous channel for steam to flow is formed, and conditions are provided for sufficient heat exchange between the steam and the cooling water.

As shown in fig. 1, in this embodiment, the steam recycling device further includes a backwater guiding assembly, which includes a backwater guiding plate 6, the backwater guiding plate is funnel-shaped, and has a rectangular cross section, one side of the backwater guiding plate is fixedly connected to the tower wall, and the other side of the backwater guiding plate is fixedly connected to the cooling water spraying assembly, and is used for guiding the quench water (including the cooling water) to the circulating water tank 7, so as to prevent the excessive quench water from spraying into the coke to affect the quality.

In this embodiment, the backwater guide assembly includes a guide water receiving plate 60 disposed below each cooling water spray assembly and above the coke quenching car, and the bottommost cooling water spray assembly 11 disposed adjacent to the guide water receiving plate 60 and the guide water receiving plate together form a shielding area of the coke quenching car, so as to prevent excessive water from spraying into coke to affect quality. As shown in FIG. 1, the deflector is similar in shape to the cooling water spray assemblies but is slightly longer so as to catch the cooling water sprayed from the lowermost cooling water spray assembly disposed immediately above the deflector, and the lowermost cooling water spray assembly does not have spray headers at the locations corresponding to the gaps between the deflector and the tower wall, so that the deflector 60 and the lowermost cooling water spray assembly form a shield area for the quench car to prevent excessive water from spraying into the coke and affecting the quality. Of course, the length of the diversion water receiving plate 60 can be properly lengthened according to the area of the quenching car, so that the diversion water receiving plate alone forms a shielding area for the quenching car and prevents cooling water from being sprayed to coke. The free end of the diversion water receiving plate 60 can form a water retaining part 601 so that the received spray cooling water is diverted to a preset direction.

The free end of the cooling water spray assembly is provided with a water retaining part 110 to ensure that the cooling water on the upper part of the cooling water spray assembly can be collected towards the direction of the tower wall and guided to a preset area outside the coke quenching car 1 by the water return guide part 6.

The following detailed description of the working principle of the embodiments of the present invention is made with reference to the accompanying drawings:

as shown in figure 1, after red coke is pushed into a quenching car 1 from a furnace, the quenching car is pushed into the lower part of a vapor recovery device of a quenching tower by a locomotive along a track, and a front sealing door 2 and a rear sealing door 2 are closed to form a space with the bottom opened relative to the sealed upper part, namely a water spraying quenching section 3; the water sprayer 4 instantly sprays a large amount of coke quenching water to the hot coke so as to rapidly extinguish the coke, and simultaneously generates a large amount of hot ascending steam air mass to enter a cooling absorption section 5 of the device, and the redundant coke quenching water flows back to a circulating water tank 7; the hot steam flow which is zigzag and ascends passes through the multilayer cooling water spraying component 11, the temperature is gradually reduced, the steam is condensed into fine water drops, the fine water drops move downwards and are enriched under the action of gravity, large water drops are gradually formed and dissolved into the cooling water, and finally the large water drops are converged to the return water guide plate 6 and return to the circulating water tank 7 through the drain pipe 9 for repeated utilization. Meanwhile, the coke powder in the water gas is separated out due to the gravity action, the coke powder is mixed into the water and carried out, and the residual hot air is discharged through the exhaust flue 10.

Although the present invention has been described with reference to specific embodiments, it is not intended to be limited to the specific embodiments disclosed, and equivalent component substitutions by those skilled in the art may be made without departing from the spirit and scope of the present invention, e.g., 1) making different shapes of the space for the generation, cooling, recovery, and discharge of quench steam using different materials. 2) The spraying devices with different shapes and different spatial positions form a steam flow zigzag cooling flow passage, or equivalent changes and modifications made according to the protection scope of the present invention should still belong to the scope covered by the present patent.

Claims

1. The utility model provides a coke quenching tower vapor-recovery unit, the coke quenching tower is including water spray quenching section and evacuation flue, the water spray quenching section is equipped with quenching water jet equipment, its characterized in that: the bottom of the water spraying quenching section forms a relatively closed space, the quenching tower vapor recovery device comprises a cooling absorption device arranged between the water spraying quenching section and the exhaust flue of the quenching tower, and the cooling absorption section is formed in the quenching tower.

2. The quench tower vapor recovery apparatus of claim 1, further comprising a containment door disposed at an entrance/exit of a quench car at the bottom of the water spray quench section, the containment door isolating the passage of the water spray quench section from the outside air to form a relatively enclosed space at the bottom of the quench tower.

3. The quench tower vapor recovery device of claim 1 or 2, wherein the cooling absorption device comprises a cooling water spray assembly disposed on an inner wall of the quench tower, the cooling water spray assembly being connected to a quench water circulating water sump by a water pump.

4. The quench tower vapor recovery apparatus of claim 3 wherein the cooling water spray assemblies are provided in multiple layers and staggered to form a serpentine path for cooling to absorb heat from the vapor.

5. The quench tower vapor recovery apparatus of claim 4, wherein the cooling water spray assembly has a shape corresponding to a partial cross-sectional shape of the cooling absorption section of the quench tower, the cooling water spray assembly being fittingly mounted to a partial inner wall of the cooling absorption section of the quench tower, the remainder forming the vapor channel.

6. The coke quenching tower vapor recovery device of claim 5, wherein the vapor recovery device comprises a return water guide assembly for guiding cooling water sprayed from the cooling water spray assembly, the return water guide assembly comprises a guide plate and a guide water receiving component, the guide plate is in a shape of a funnel, the cross section of the guide plate is rectangular, one side of the guide plate is fixedly connected with the tower wall, and the other side of the guide plate is fixedly connected with the cooling water spray assembly; the water guiding and receiving component is correspondingly arranged below the cooling water spraying component on the upper layer and above the coke quenching car, the cooling water spraying component close to the lowest layer and the water guiding and receiving component jointly form a coke quenching car shielding area, and the water guiding and receiving component is provided with a water retaining part.

7. The quench tower vapor recovery device of claim 4, wherein the cooling absorption device comprises a return water diversion assembly that diverts cooling water from the cooling water spray assembly, the cooling water containing vapor condensate, to an area outside of a quench car of the water spray quench section, the cooling water returning to the circulating water sump.

8. The quench tower vapor recovery apparatus of claim 7, wherein the return water diversion assembly comprises a diversion plate having a funnel shape with a rectangular cross-section and fixedly attached to the tower wall on one side and to the cooling water spray assembly on the other side.

9. The quench tower vapor recovery device of claim 8, wherein the water return diversion assembly comprises a diversion water receiving component disposed below the cooling absorber and above the quench car, and a bottommost cooling water spray assembly disposed proximate the diversion water receiving component forms a quench car shadow therewith.

10. The quench tower vapor recovery device of claim 9, wherein the diversion water intake component is provided with a water dam.