CN108398036A - Plate dirt processing method in a kind of shell-and-plate blast furnace evaporative air-cooling system operation - Google Patents

Abstract

The invention discloses a method for treating plate scale during operation of an evaporative air-cooling system of a plate-shell type blast furnace, and belongs to the technical field of blast furnace ironmaking production. The plate-shell type blast furnace evaporative air cooling system in the present invention includes a base, a shell directly above the base that is fixedly connected to each other, and a vertically layered cooling plate bundle set fixedly installed inside the shell, and also includes the top of the shell and the shell The fixed-connected induced-air cooling tower replaces the suction fan through the induced-air cooling tower. It is not necessary to frequently replace and repair the fan motor because the motor is easily damaged by moisture. It can be in a normal working state for a long time, saving power and refrigerant water consumption. . The scale treatment method of the present invention can perform periodic and regular physical descaling during the operation of the entire system, is flexible and maneuverable, has a thorough treatment effect, improves the heat exchange and cooling effects of the entire system, and increases the continuous operation time and service life. life.

Description

A method for treating plate scale during the operation of the evaporative air cooling system of the plate and shell type blast furnace

The application of the present invention is a divisional application, the application number of the parent application: 2016109285250; the name of the parent application: a plate-shell type blast furnace evaporative air cooling system using a soft water closed circulation cooling system and its scale treatment method; the application date of the parent application: 2016-10 -31.

technical field

The invention relates to the technical field of blast furnace ironmaking production, in particular to a method for treating plate scale during operation of an evaporative air cooling system of a plate and shell type blast furnace.

Background technique

The main feature of the evaporative air cooler is to use the evaporation of the water film outside the tube to enhance the heat transfer outside the tube. Its working process is to use the circulating water pump in the system to deliver the spray cooling water to the spray water distributor located above the horizontally placed light tube bundle. , the distributor sprays the cooling water down to the surface of the heat transfer tube, so that the outer surface of the tube forms a continuous and uniform thin water film; at the same time, the air is sucked from the air suction window at the lower part of the equipment by the fan, so that the air flows from bottom to top, horizontally Sweeping light tube bundles placed horizontally. At this time, the heat transfer outside the tube of the heat transfer tube depends on the sensible heat transfer between the water film and the air flow, and the rapid evaporation of the water film on the outer surface of the tube absorbs a large amount of heat, which strengthens the heat transfer outside the tube.

Since water has a high latent heat of vaporization (the latent heat of vaporization of water at an atmospheric pressure is 570Kcal/Kg), the evaporation of the water film outside the tube greatly enhances the heat transfer outside the tube, which significantly improves the overall heat transfer efficiency of the equipment. The evaporation of the water film on the outer surface of the tube makes the air humidity increase after passing through the tube bundle of the bare tube and is close to saturation. The fan is generally a top-mounted type, which draws the saturated humid air from the tube bundle and passes it through the water retainer located above the spray water distributor. After removing the water droplets entrained in the saturated humid air, it is discharged into the atmosphere from the outlet of the fan on the top of the equipment. Since the fan is located on the upper part of the equipment and sucks air upward, a negative pressure area is formed in the space below the fan, which accelerates the evaporation of the water film on the outer surface of the tube. , which is conducive to strengthening the heat transfer outside the tube. In the evaporative cooler, the process medium flows horizontally in the tube, the air and water flow outside the tube, the air flows from bottom to top, and the spray water flows from top to bottom. Water, air and process The medium is cross-flow, and the water and air are counter-flow. In this way, although the heat and mass transfer process is strengthened in terms of process layout, it also brings technical problems that the fan is easy to rust and the motor is eroded by hot air for a long time, resulting in a short service life. .

At present, such as an evaporative cooler with a patent number of 02255480.7, the water in the water tank is pumped to the spray device, and the water is sprayed on the heat exchange tube bundle, and the heat transfer is achieved through the evaporation of water on the surface of the heat exchange tube bundle. Compared with the previous cooling device, the cooler has the advantages of small footprint, high transmission efficiency, low investment cost, and less circulating cooling water. However, since the outer shell of the cooler is fixed, there is no openable Therefore, with the continuous use of the cooler, scale is easy to form on the surface of the heat exchange tube bundle, which cannot be cleaned in time, which affects the efficiency of heat transfer.

Chinese Patent Publication No.: 202177322U discloses a plate type evaporative cooler, which includes a water tank located at the bottom, a housing located above the water tank, an air inlet located on the housing, and a heat exchanger located inside the housing and above the air inlet. The heating device, the spraying device above the heat exchange device, the circulating water pump connected to the spraying device through the upper water pipe for spraying, the water collector above the spraying device, and the cooling device above the water collector. The spraying device includes a plurality of spraying branch pipes, and each spraying branch pipe is provided with a plurality of water distributors. The heat exchange device is a heat exchange plate bundle formed by pressing a plurality of heat exchange plates. A channel through which the heat supply process medium passes, and two ends of the heat exchange plate bundle are provided with an inlet and an outlet of the heat process medium communicating with the above-mentioned channel. The heat exchange device of the cooler occupies less space and has high transfer efficiency, and at the same time, the cooler also better saves water resources. But this utility model also has the problems that the service life of the blower motor is not long and the scale treatment is not thorough.

Contents of the invention

1. The technical problem to be solved by the invention

Aiming at the problems existing in the prior art of the plate and shell blast furnace evaporative air cooling system using a soft water closed circulation cooling system, the service life of the fan motor is not long and the scale treatment is not thorough, the present invention provides a plate and shell blast furnace evaporative air cooling system Scale treatment method during operation. It can achieve the cooling effect without using a fan, and the board scale is completely treated, and the use and production costs are reduced due to the absence of a fan.

2. Technical solution

In order to achieve the above object, the technical scheme provided by the invention is:

A plate-shell blast furnace evaporative air cooling system adopting a soft water closed circulation cooling system, including a base, a shell fixedly connected to each other directly above the base, and a vertical layered arrangement of cooling plate bundles fixedly installed inside the shell, and also includes The induced-air cooling tower fixedly connected to the shell above the shell, with the top fully open upwards, replaces the suction fan with the induced-air cooling tower, which reduces the total installed capacity and production and operation costs, and does not require frequent cooling due to the damp and easy damage of the motor. The replacement and maintenance of the fan motor can keep it in normal working condition for a long time, saving electric energy and refrigerant water consumption. The scale treatment method of the present invention can perform periodic and regular physical descaling during the operation of the entire system, and can also completely descale the system during the shutdown process, which is flexible and has a thorough treatment effect, and improves the heat exchange of the entire system , Cooling effect, increasing the continuous running time and service life.

As a further technical solution, the induced draft cooling tower is a waist tower-shaped hyperbolic cooling tower that opens from the middle downwards and outwards, which conforms to the principle that wind vortices are easy to generate in fluid mechanics, and the airflow generated is fast, which can effectively improve the cooling effect .

As a further technical solution, there are 2 to 5 induced-air cooling towers, which completely cover the upper opening of the shell, and are arranged differently according to the model size of the evaporative air cooler to ensure the cooling effect of different types of evaporative air coolers.

As a further technical solution, the outer wall of the induced draft cooling tower is evenly distributed with reinforcing ribs, which play the role of fastening and stabilizing the cooling tower. The inner wall is evenly fixed and distributed with water baffles, which can condense part of the water and drip back to the system to prevent excessive Excessive water discharge causes waste of water resources.

In a further technical solution, the water retaining piece is ring-shaped and has a downwardly inclined and open trumpet shape, which does not affect the formation of the wind vortex and effectively prevents the excessive discharge of water.

The further technical solution also includes a descaling device, the descaling device includes two brackets, the upper platform of each bracket is fixed with a guide frame, the bottom is fixed with a driving assembly, and the top of the driving assembly is connected to a horizontal descaling liquid spray tube bundle; The left and right ends of the descaling liquid spray tube bundle are connected by sliding up and down with the two guide frames, the diameter of the descaling liquid spray tube in between is slightly smaller than the gap between the cooling plate bundles and the two sides of the descaling liquid spray tube are evenly opened There is a liquid outlet, and the descaling device can perform descaling from time to time during the operation of the entire system, and it can also completely descale the system during shutdown. It is flexible and maneuverable, and the treatment effect is thorough, which improves the cooling effect of the entire system without intermittent Continuous runtime and service life.

A further technical solution also includes a blower fixed on the side of the base, the base is semi-closed with an upper opening, the bottom is a spray pool, and the side opposite to the blower is provided with a spray outlet connected to the spray device through a pipeline , the spraying device is set on the inner side of the upper part of the housing, and there are spraying ports evenly opened downwards, and the spraying ports have no dead ends and are directly above the cooling plate bundle; The erosion of the insulation and the rust of the fan improve the service life of the blower (the top-mounted type in the prior art sucks the hot moisture and discharges it, and the moisture directly rushes to the motor, and the risk of the motor getting damp is greater); The air induction of the air cooling tower cooperates with each other, which accelerates the efficiency of the air induction and further improves the cooling effect; moreover, the air blowing can also delay the falling speed of the spray water on the cooling plate bundle, and accelerate the formation of the water film on the outer surface of the plate bundle. Evaporate, increase the evaporation, increase the heat exchange with the soft water in the plate bundle, and the combination of the induced draft cooling tower, the lower blower, and the spray device has a strong synergy and effect.

In a further technical solution, the blower is an axial flow fan with high blowing efficiency and can be in working condition for a long time; the drive assembly is an electro-hydraulic push rod with a long push distance and is flexible; the bottom of the support is fixedly connected to the guide wheel, Guide the bracket to move along the length direction, save labor and realize automatic operation; the base is equipped with a windshield wall to prevent impurities from blowing into the system, and stabilize the air pressure around the system to stabilize the axial flow fan.

A method for treating plate scale in an evaporative air-cooling system of a plate-shell blast furnace, the steps of which are as follows:

Step 1. Shutdown: Shut down the entire plate and shell blast furnace evaporative air cooling system, and push the descaling device into the plate and shell blast furnace evaporative air cooling system along the length direction of the plate and shell blast furnace evaporative air cooling system. On both sides of the blast furnace evaporative air-cooling system, the descaling liquid nozzle bundle is placed flat on the bottom of the cooling plate bundle, and the descaling liquid nozzle is facing the gap between the cooling plate bundles;

Step 2. Spray liquid: After starting the drive assembly, start the spraying of the descaling liquid nozzle, and rotate the descaling liquid nozzle at the same time, the descaling liquid nozzle bundle slides up and down between the cooling plate bundles to spray the cooling plate bundle With brush descaling, the combination of chemical and physical methods can be used to completely descale in a small space;

Step 3. Move: After processing a part of the cooling plate bundles, lower the descaling liquid nozzle bundle to the minimum, continue to push forward along the length direction of the plate and shell blast furnace evaporative air cooling system, repeat step 2, and segment the entire cooling plate Bundle together for spray descaling.

Another treatment method is applied to the operation of the evaporative air cooling system of the plate and shell blast furnace. The steps are:

Step 1. Push the descaling device into the plate and shell blast furnace evaporative air cooling system along the length direction of the plate and shell blast furnace evaporative air cooling system. Two brackets are arranged on both sides of the plate and shell blast furnace evaporative air cooling system. At the bottom of the cooling plate cluster, the descaling liquid nozzle is facing the gap between the cooling plate bundles; the outer wall of the descaling liquid nozzle is fixed with a brush;

Step 2. Descaling: After starting the drive assembly, turn the descaling liquid spray tube, and the descaling liquid spray tube bundle slides up and down between the cooling plate bundles to descale the cooling plate bundles or prevent the formation of plate scale through the brush;

Step 3. Move: After processing a part of the cooling plate bundles, lower the descaling liquid nozzle bundle to the minimum, continue to push forward along the length direction of the plate and shell blast furnace evaporative air cooling system, repeat step 2, and segment the entire cooling plate Bunch together for brush descaling.

3. Beneficial effect

Compared with the prior art, the technical solution provided by the invention has the following beneficial effects:

(1) A plate-shell blast furnace evaporative air-cooling system using a soft water closed circulation cooling system of the present invention replaces the fan that acts as a suction through an induced-air cooling tower, which reduces the total installed capacity and production costs, and does not need to be damaged due to the motor Frequent replacement of the fan can keep it in working condition for a long time;

(2) A kind of plate and shell type blast furnace evaporative air cooling system adopting soft water closed circulation cooling system of the present invention, waist tower shape hyperbolic cooling tower, accord with the principle that wind vortex is easy to produce in fluid mechanics, the air velocity of generation is fast, can effectively Improve cooling effect;

(3) A kind of plate-shell type blast furnace evaporative air cooling system adopting a soft water closed circulation cooling system of the present invention has 2 to 5 induced draft cooling towers. The cooling effect of the model evaporative air cooler;

(4) A kind of plate and shell type blast furnace evaporative air-cooling system adopting soft water closed circulation cooling system of the present invention, reinforcing rib plays the effect of fastening and stabilizing cooling tower; Excessive water discharge causes waste of water resources;

(5) In the plate-shell type blast furnace evaporative air cooling system adopting soft water closed circulation cooling system of the present invention, the water retaining plate is ring-shaped, and is in the shape of a downwardly inclined and open trumpet, which does not affect the formation of wind vortex, and effectively blocks water excessive discharge of

(6) In the plate-shell type blast furnace evaporative air cooling system using a soft water closed circulation cooling system of the present invention, the descaling device can perform irregular descaling during the operation of the entire system, and can also completely descale the system during shutdown , flexible and maneuverable, the treatment effect is thorough, which improves the cooling effect, non-intermittent running time and service life of the entire system;

(7) A kind of plate-shell type blast furnace evaporative air-cooling system adopting soft water closed circulation cooling system of the present invention, the air blower is installed under the type, blows inwardly, does not have hot moisture to the erosion of motor insulation and the rust to air blower, has improved air blower Service life; the inward blowing and the induced air of the induced air cooling tower cooperate with each other, which accelerates the efficiency of the induced air and further improves the cooling effect; moreover, the blowing can also delay the falling speed of the spray water on the cooling plate bundle, accelerating The evaporation of the water film on the outer surface of the plate bundle set increases the amount of evaporation and the heat exchange with the soft water in the plate bundle set. The combination of the induced draft cooling tower, the lower blower and the spray device has a strong synergy action and effect;

(8) A kind of plate-shell type blast furnace evaporative air-cooling system adopting a soft water closed circulation cooling system of the present invention, the windshield wall prevents impurities from blowing into the system, and stabilizes the air pressure around the system, playing the role of stabilizing the axial flow fan;

(9) A kind of scale processing method of the plate and shell type blast furnace evaporative air cooling system adopting the soft water closed circulation cooling system of the present invention can utilize the descaling liquid nozzle bundle to spray the descaling liquid and the hairbrush to carry out the plate scaling thoroughly when shutting down Cleaning, the combination of chemical and physical methods in a small space for thorough descaling, easy to operate, and rapid descaling;

(10) A method for treating plate scale of the plate and shell type blast furnace evaporative air cooling system using a soft water closed circulation cooling system of the present invention can also process plate scale during the operation of the entire system, and can also prevent plate scale by using a hair brush generated to avoid corrosion of the cooling plate bundle when descaling with descaling fluid.

Description of drawings

Fig. 1 is a kind of structure schematic diagram of the plate-shell type blast furnace evaporative air-cooling system that adopts soft water closed circulation cooling system of embodiment 3;

Fig. 2 is the side view of a kind of plate-shell type blast furnace evaporative air-cooling system that adopts soft water closed circulation cooling system of embodiment 3;

Fig. 3 is the structural representation of the descaling device in embodiment 2;

Fig. 4 is a side view of the descaling device in embodiment 2;

Fig. 5 is a schematic diagram of the use state of the plate and shell blast furnace evaporative air cooling system adopting the soft water closed circulation cooling system in embodiment 3;

Fig. 6 is a side view of the use state of the evaporative air cooling system of the plate-shell blast furnace using the soft water closed circulation cooling system in embodiment 3.

Explanation of the symbols in the schematic diagram: 1. Base; 2. Shell; 3. Induced air cooling tower; 4. Spraying device; 5. Blower; 6. Descaling device; 21. Cooling plate bundle; ; 23, cooling water inlet; 31, reinforcing rib; 32, water retaining sheet; 41, spray outlet; 61, descaling liquid nozzle bundle; 62, guide frame; 63, bracket;

Detailed ways

In order to further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings.

Example 1

Two 4000m ³ blast furnace staves and hot blast stoves in a steel plant use soft water closed circulation cooling system. The two blast furnaces use a total of 38 plate and shell blast furnace evaporative air cooling systems using soft water closed circulation cooling system in this embodiment. They operate in parallel. This implementation An example of a plate and shell blast furnace evaporative air cooling system using a soft water closed circulation cooling system, including a base 1 of 3m*9m, a shell 2 fixedly connected to each other directly above the base 1, and a vertical layered layout fixedly installed inside the shell 2 The cooling plate bundle 21, the cooling plate bundle 21 communicates with the soft water system of the blast furnace through the cooling water inlet 23 and the cooling water outlet 22, the cooling water inlet 23 and the cooling water outlet 22 are opposite on both sides of the cooling plate bundle 21, and The cooling water inlet is set on the top and the cooling water outlet is set on the bottom, which is opposite to the direction of the wind and flows against the wind direction, which is equivalent to secondary heat exchange and improves the heat exchange efficiency; it also includes two fixed connections between the top of the shell 2 and the shell 2. The induced-air cooling tower 3 made of color-coated plates completely covers the opening at the upper end of the housing 2, and the top of the induced-air cooling tower 3 opens completely upwards. In this embodiment, the induced-air cooling tower 3 is downward from the middle and opens outward Waist tower-shaped hyperbolic cooling tower with a height of 3 meters.

The evaporative air cooling system of the plate and shell blast furnace adopting the closed circulation cooling system of soft water in this embodiment replaces the fan that acts as a suction fan through the induced air cooling tower, which reduces the total installed capacity and production cost, and does not require frequent replacement due to the fragile motor The fan can be in working condition for a long time. The waist tower-shaped hyperbolic cooling tower conforms to the principle that wind vortices are easy to generate in fluid mechanics, and the airflow generated is fast, which can effectively improve the cooling effect.

Example 2

The plate-shell type blast furnace evaporative air-cooling system adopting soft water closed cycle cooling system in this embodiment has the same basic structure as that in Embodiment 1, the difference and improvement are: there are 5 hyperbolic cooling towers with a height of 4 meters, and the outer walls are evenly and fixedly distributed There are reinforcing ribs 31 to fasten and stabilize the cooling tower, and the inner wall is evenly fixed with water retaining sheets 32, which condense part of the water and drip back to the system to prevent excessive water discharge from causing waste of water resources. The water baffle 32 is ring-shaped, and is in the shape of a trumpet that is inclined downward and open, which does not affect the formation of wind eddies, and effectively prevents the excessive discharge of water. As shown in Fig. 3, 4, also comprise descaling device 6, described descaling device 6 comprises 2 supports 63, and each support 63 upper platform is fixed with guide frame 62, and bottom is fixed with driving assembly 64, and driving assembly 64 top Connect the descaling liquid nozzle bundle 61 in a horizontal state; the left and right ends of the descaling liquid nozzle bundle 61 are connected to the two guide frames 62 by sliding up and down, and the diameter of the descaling liquid nozzles in between is slightly smaller than the cooling plate in the cooling plate bundle set 21 There are liquid outlets evenly opened on both sides of the descaling liquid nozzle, and brushes are fixed on the outer wall of the descaling liquid nozzle; the descaling device can perform irregular descaling during the operation of the entire system, and can The system is completely descaled during shutdown, flexible and maneuverable, and the treatment effect is thorough, which improves the cooling effect, non-intermittent running time and service life of the entire system.

The plate and shell blast furnace evaporative air cooling system using the soft water closed circulation cooling system in this embodiment can be applied to the operation process of the plate and shell blast furnace evaporative air cooling system. The steps are as follows:

Step 1. Push the descaling device 6 into the plate and shell blast furnace evaporative air cooling system along the length direction of the plate and shell blast furnace evaporative air cooling system. Two brackets 63 are arranged on both sides of the plate and shell blast furnace evaporative air cooling system. 61 is placed on the bottom of the cooling plate bundle set 21, and the descaling liquid nozzle is facing the gap between the cooling plate bundles; the outer wall of the descaling liquid nozzle is fixed with a brush;

Step 2. Descaling: After starting the drive assembly 64, turn the descaling liquid spray pipe, and the descaling liquid spray pipe bundle 61 slides up and down between the cooling plate bundles 21 to descale the cooling plate bundle or prevent the plate scale through the brush It can avoid the pollution of spray water after frequent use of descaling liquid, which will cause corrosion of cooling plate bundles during spray cooling and heat exchange;

Step 3. Move: After processing part of the cooling plate bundles 21, reduce the descaling liquid nozzle bundle 61 to the minimum, continue to push forward along the length direction of the plate and shell blast furnace evaporative air cooling system, repeat step 2, and segment the entire Cooling plate bundle 21 carries out brush descaling.

The scale treatment method of the plate and shell type blast furnace evaporative air cooling system of the present embodiment can also be applied to the thorough treatment of the generated plate scale in the plate and shell type blast furnace evaporative air cooling system that works for a long time (not yet applied), the steps are as follows :

Step 1. Shutdown: Shut down the entire plate and shell blast furnace evaporative air cooling system, and push the descaling device 6 into the plate and shell type blast furnace evaporative air cooling system along the length direction of the plate and shell blast furnace evaporative air cooling system. On both sides of the shell-type blast furnace evaporative air-cooling system, the descaling liquid nozzle bundle 61 is placed on the bottom of the cooling plate bundle 21, and the descaling liquid nozzle is facing the gap between the cooling plate bundles;

Step 2, liquid spraying: After starting the driving assembly 64, start the spraying of the descaling liquid nozzle, and rotate the descaling liquid nozzle at the same time, the descaling liquid nozzle bundle 61 slides up and down between the cooling plate bundles 21 to the cooling plate bundle Perform spray and brush descaling;

Step 3. Move: After processing part of the cooling plate bundles 21, reduce the descaling liquid nozzle bundle 61 to the minimum, continue to push forward along the length direction of the plate and shell blast furnace evaporative air cooling system, repeat step 2, and segment the entire The cooling plate bundle 21 is sprayed for descaling.

The plate-shell blast furnace evaporative air-cooling system adopting the soft water closed cycle cooling system in this embodiment can be stably fixed on the upper part of the shell 2 because the hyperbolic cooling tower is different from the top-mounted fan, which avoids the continuous vibration of the fan from affecting the cooling. The impact of the plate bundle set 21 makes the whole system in a very stable state, and the descaling device can prevent the formation of plate scale at any time, without stopping the machine just for descaling, which ensures the continuous operation of the entire system. There are brushes fixed on the outer wall of the nozzle, which can delay the downflow of spray water while descaling, thereby improving the heat exchange effect inside and outside the cooling plate cluster 21;

According to calculations, the evaporative air cooling system of the plate and shell blast furnace using the soft water closed circulation cooling system in this embodiment has been running continuously without maintenance since it was applied in May 2015, and the heat exchange and cooling effect has remained unchanged.

Example 3

The basic structure and descaling method of the plate-shell blast furnace evaporative air-cooling system using a soft water closed circulation cooling system in this embodiment are the same as those in Embodiment 2. The differences and improvements are as follows: as shown in Figures 1, 2, 5 and 6, double There are 3 curved cooling towers with a height of 6 meters, and a blower 5 fixed on the side of the base 1. The base 1 is semi-closed with an upper opening, and the bottom is a spray pool. The side opposite to the blower 5 has a The spray outlet 41 of the spray device 4 is connected to the spray outlet 41 through a pipeline. The spray device 4 is arranged on the inner side of the upper part of the housing 1, and a spray port is evenly opened downward. Above; the blower is placed under the blower, blowing inward, without hot and humid air eroding the insulation of the motor and rusting the fan, which improves the service life of the blower; the inward blowing and the induced air of the induced air cooling tower cooperate with each other to accelerate the induced air efficiency, and further improve the cooling effect; moreover, blowing can also delay the falling speed of the spray water on the cooling plate bundle, accelerate the evaporation of the water film on the outer surface of the plate bundle, increase the evaporation, and improve the connection with the plate bundle. The combination of heat exchange of internal soft water, induced draft cooling tower, lower blower, and spraying device has a strong synergistic effect and effect. The blower 5 is an axial flow fan with high blowing efficiency and can be in working condition for a long time; the drive assembly 64 is an electro-hydraulic push rod with a long push distance and is flexible; the bottom of the bracket 63 is fixedly connected with guide wheels to guide the bracket Moving along the length direction, the operation is labor-saving, and automatic operation can be realized; a windshield wall can be set on the periphery of the base 1 to prevent impurities from blowing into the system, and stabilize the air pressure around the system to stabilize the axial flow fan.

Example 4

The plate-shell blast furnace evaporative air-cooling system adopting soft water closed cycle cooling system in this embodiment has the same basic structure and descaling method as in Embodiment 2, the difference and improvement are: in step 2, start the blower while starting the drive assembly 64 5. It can play a synergistic effect on the heat exchange and cooling of the combination of the induced air cooling tower, the lower blower, the spray device and the brush, which further delays the downstream of the spray water and further improves the cooling efficiency; the descaling The liquid nozzle is a square tube with a width slightly smaller than the gap between the cooling plate bundles. The square tube can fit the square gap between the cooling plate bundles, and the effect of descaling and preventing the formation of plate scale is better.

Example 5

The plate and shell type blast furnace evaporative air cooling system adopting the soft water closed circulation cooling system of this embodiment has the same basic structure and descaling method as that of embodiment 2, the difference and improvement are: the two cooling plate bundles 21 in each segment The descaling devices 6 are arranged on both sides, and the descaling liquid nozzle bundles 61 are interspersed between the cooling plate bundles 21, and each descaling device 6 is linked by a chain device, so that each descaling device 6 operates synchronously. The descaling device 6 is moved along the length direction of the plate bundle, and it is more convenient for descaling to prevent the generation of plate scale.

The above schematically describes the present invention and its implementation, which is not restrictive, and what is shown in the drawings is only one of the implementations of the present invention, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, without departing from the inventive concept of the present invention, without creatively designing a structural mode and embodiment similar to the technical solution, it shall all belong to the protection scope of the present invention .

Claims (5)

1. plate dirt processing method in a kind of shell-and-plate blast furnace evaporative air-cooling system operation, it is characterised in that：The shell-and-plate blast furnace It is solid inside the shell (2) and shell (2) that evaporative air-cooling system includes pedestal (1), is mutually permanently connected right over pedestal (1) The coldplate constriction (21) of the vertical layered layout of Dingan County's dress, which is characterized in that further include solid with shell (2) above shell (2) Surely the induced draft cooling tower (3) connected, induced draft cooling tower (3) top are open fully up；

The induced draft cooling tower (3) is downward from middle part and external-open the tower-like double-curve cooling column of waist；

The induced draft cooling tower (3) has 2 to 5, and shell (2) upper end opening is completely covered；

Further include apparatus for eliminating sludge (6), the apparatus for eliminating sludge (6) includes 2 holders (63), and each holder (63) upper brace is fixed There are leading truck (62), bottom to be fixed with drive component (64), the cleaning mixture jet pipe of horizontality is connected at the top of drive component (64) Beam (61)；The left and right ends of cleaning mixture jet pipe beam (61) and 2 leading trucks (62) slide up and down connection, cleaning mixture jet pipe therebetween Caliber is slightly less than the gap between coldplate beam in coldplate constriction (21), and cleaning mixture jet pipe both sides are uniformly provided with liquid outlet；

Step is：

Step 1: by apparatus for eliminating sludge (6) along the length direction push-in system of shell-and-plate blast furnace evaporative air-cooling system, 2 holders (63) row system both sides, cleaning mixture jet pipe beam (61) is divided to be flat on coldplate constriction (21) bottom, the cooling of cleaning mixture jet pipe face Gap between plate beam；Cleaning mixture jet pipe outer wall is fixed with hairbrush；

Step 2: except plate dirt：After starting drive component (64), cleaning mixture jet pipe is rotated, cleaning mixture jet pipe beam (61) is in coldplate It is slided up and down between constriction (21) and scale removal or the generation of prevention plate dirt is carried out by hairbrush to coldplate beam；

Step 3: mobile：After having handled a part of coldplate constriction (21), continue to be pushed forward along the length direction of system, repeats to walk Rapid two, it is segmented that hairbrush scale removal is carried out to entire coldplate constriction (21).

2. plate dirt processing method in shell-and-plate blast furnace evaporative air-cooling system operation according to claim 1, it is characterised in that： The uniform stationary distribution of induced draft cooling tower (3) outer wall has reinforcing rib (31), the uniform stationary distribution of inner wall to have block water plate (32).

3. plate dirt processing method in shell-and-plate blast furnace evaporative air-cooling system operation according to claim 2, it is characterised in that： The block water plate (32) is in a ring, and open horn-like in tilting down.

4. plate dirt processing method in shell-and-plate blast furnace evaporative air-cooling system operation according to claim 3, it is characterised in that： Further include the air blower (5) for being fixed on pedestal (1) side, the pedestal (1) is in the semiclosed shape of upper opening, and bottom is spray Pond, the side opposite with air blower (5) are provided with the spray water outlet (41) that spray equipment (4) is connected to by pipeline, the spray Shower device (4) is set to shell (1) upper inner, is uniformly provided with spray port downwards, and spray port covers in coldplate constriction without dead angle (21) right over.

5. plate dirt processing method in shell-and-plate blast furnace evaporative air-cooling system operation according to claim 3, it is characterised in that： The air blower (5) is axial flow blower；The driving component (64) is Electrohydraulic push rod；Holder (63) bottom, which is fixedly connected, leads To wheel；Pedestal (1) the periphery setting windbreak.