CN202582266U - Rotating-stream-tray scrubber heat exchanger - Google Patents

Abstract

The utility model discloses a swirl plate tower heat exchanger, which comprises a heat exchange tower body, a nozzle, a swirl plate, a defogging plate, a water pump, a heat exchanger and a high-temperature water storage tank. The technical effect of the utility model lies in that through The flue gas of the utility model lowers the temperature below 50 degrees Celsius at one time, and the flue gas directly contacts with the sprayed water, fully absorbs the sensible heat and latent heat in the flue gas, heats the circulating water, and then transfers the heat through the plate heat exchanger. Replace where needed. At the same time, harmful substance dust, CO ₂ and SO ₂ in the flue gas are also captured by the spray water, which reduces the pollution of the flue gas to the environment.

Description

A swirling plate tower heat exchanger

technical field

The utility model relates to a heat exchanger, in particular to a swirl plate tower heat exchanger.

Background technique

The fuel used in industrial production contains a large amount of hydrogen, and the combustion produces a large amount of water vapor. Every 1NM ³ of natural gas can produce 1.6KG water vapor after combustion, which has considerable latent heat of vaporization, which is about 862kcal, accounting for about 10% of the low calorific value of natural gas. When the exhaust gas temperature is high, the water vapor cannot condense to release heat, and the heat is wasted when it is discharged with the flue gas. At the same time, the high-temperature flue gas also takes away a large amount of sensible heat, which together forms a large exhaust loss.

At present, in the field of flue gas waste heat recovery, indirect heat exchange is mainly used. Common heat exchangers include heat pipe heat exchangers, combined heat exchangers, and finned tube heat exchangers. The large air resistance makes the heat exchange efficiency low, and also causes the problems of easy corrosion of equipment, short service life, and difficult maintenance. After the flue gas passes through these heat exchangers, the temperature generally can only be reduced from 200°C to about 100°C. The latent heat in the flue gas is not fully absorbed, and the maximum recovery and energy saving effect cannot be achieved. It is even more difficult to reduce the temperature of the raw flue gas from 300°C to below 50°C. It must be achieved by installing fans and other measures, which in turn causes the problem of high heat exchange costs.

Contents of the invention

In order to solve the technical problems of low heat exchange efficiency, easy corrosion of equipment and short service life of existing heat exchangers used for waste heat recovery of flue gas, the utility model provides a swirling plate tower heat exchanger that can efficiently recover waste heat in flue gas .

In order to achieve the above technical purpose, the technical solution of the utility model is a swirl plate tower heat exchanger, which includes a cylindrical hollow heat exchange tower body, a nozzle, a swirl plate, a demister plate, a water pump, a heat exchanger and A high-temperature water storage tank, the lower side wall of the heat exchange tower body is provided with a smoke inlet, the top of the heat exchange tower body is provided with a smoke outlet, and the nozzle is arranged in the heat exchange tower and connected to the heat exchange tower through a water pipe. The output port of the heat release section of the heater, the swirl plate is arranged in the heat exchange tower and below the nozzle, the demister plate is arranged in the heat exchange tower and above the nozzle, the water pump The input end is connected to the bottom side wall of the heat exchange tower through a water pipe, the output end of the water pump is connected to the input port of the heat absorbing section of the heat exchanger through a water pipe, and the input port of the heat absorbing section of the heat exchanger is connected to an external water source. The output port of the heat absorbing section of the heater is connected to the high-temperature water storage tank through a water pipe.

The swirl plate tower heat exchanger described above, the swirl plate is a turbine-shaped circular fan with multiple blades, the middle part of the swirl plate is a circular swirl blind plate, and the blades swirl around the middle The blind plate is set and the slit line between the blades is the tangent of the swirl blind plate.

In the swirling plate tower heat exchanger, the defogging plate is a turbine-shaped circular fan with multiple blades, the middle part of the defogging plate is a circular blind defogging plate, and the blades surround the middle part for defogging The blind plate is set and the slit line between the blades is the tangent of the defogging blind plate.

The said swirl plate column heat exchanger, the number of said swirl plates is 2-6, and the number of demister plate is 1.

In the said swirling plate tower heat exchanger, the opening direction of the smoke inlet is the tangential direction of the outer wall of the heat exchange tower body.

In the swirling plate tower heat exchanger, the smoke inlet is inclined downward and forms an included angle of 5-10° with the horizontal direction.

In the said swirling plate tower heat exchanger, the bottom of the heat exchange tower body is provided with a blowdown outlet for blowdown.

The said swirl plate tower heat exchanger, said heat exchange tower body, defogging plate and swirl plate are made of stainless steel 316L material or ND steel or polymer composite material.

The technical effect of the utility model is that the temperature of the flue gas of the utility model is lowered below 50 degrees at one time, and the flue gas is in direct contact with the sprayed water, fully absorbing the sensible heat and latent heat in the flue gas, and heating the circulating water , and then displace the heat to the place where it is needed through the plate heat exchanger. At the same time, harmful substance dust, CO ₂ and SO ₂ in the flue gas are also captured by the spray water, which reduces the pollution of the flue gas to the environment.

Below in conjunction with accompanying drawing, the utility model is further described.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation of the utility model swirl plate;

Fig. 3 is the structural representation of the utility model defogging plate;

Fig. 4 is an A-A sectional view of the smoke inlet of the present invention;

Among them, 1 is the heat exchange tower body, 2 is the nozzle, 3 is the swirl plate, 4 is the defogging plate, 5 is the water pump, 6 is the heat exchanger, 7 is the high temperature water storage tank, 8 is the sewage outlet, and 9 is the swirl blind. Plate, 10 are defogging blind plates, 11 are smoke inlets, and 12 are smoke outlets.

Detailed ways

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the utility model includes a cylindrical hollow heat exchange tower body 1, a nozzle 2, a swirl plate 3, a defogging plate 4, a water pump 5, a heat exchanger 6 and a high temperature storage The water tank 7, the lower side wall of the heat exchange tower body 1 is provided with a smoke inlet 11, the top of the heat exchange tower body 1 is provided with a smoke outlet 12, and the nozzle 2 is arranged in the heat exchange tower and passed through The water pipe is connected to the output port of the heat release section of the heat exchanger 6, the swirl plate 3 is arranged in the heat exchange tower and under the nozzle 2, and the demister plate 4 is arranged in the heat exchange tower and is located in the nozzle 2, the input end of the water pump 5 is connected to the bottom side wall of the heat exchange tower through a water pipe, and the output end of the water pump 5 is connected to the input port of the heat-absorbing section of the heat exchanger 6 through a water pipe. The input port of the heat-absorbing section of the heat exchanger 6 is connected to an external water source, and the output port of the heat-absorbing section of the heat exchanger 6 is connected to the high-temperature water storage tank 7 through a water pipe. The swirl plate 3 is a turbine-shaped circular fan provided with multiple blades, the middle part of the swirl plate 3 is a circular swirl blind plate 9, the blades are arranged around the middle swirl blind plate 9 and the slits between the blades are The lines are all tangents of the swirl blind plate 9. The defogging plate 4 is a turbine-shaped circular fan with multiple blades. The middle part of the defogging plate 4 is a circular defogging blind plate 10. The blades are arranged around the central defogging blind plate 10 and the slits between each blade are arranged. The lines are all tangents to the defogging blind plate 10. The number of swirl plates 3 is 2-6, and the number of defogging plates 4 is 1. The opening direction of the smoke inlet 11 is the tangential direction of the outer wall of the heat exchange tower body 1 . The smoke inlet 11 is inclined downward and forms an included angle of 5-10° with the horizontal direction. The bottom of the heat exchange tower body 1 is provided with a sewage outlet 8 for sewage discharge. The heat exchange tower body 1, the defogging plate 4 and the swirl plate 3 are made of stainless steel 316L or ND steel or polymer composite material.

In actual work, each blade on the swirl plate 3 in the tower forms an angle of 25-30 degrees with the horizontal plane, and rotates in the same direction for one circle. The air intake of the heat exchange tower is also a tangential air intake from the outer circle. , the flue gas enters from the bottom of the tower from the tangential direction at a high speed, and rotates up under the guidance of the swirl plate 3 blades. The liquid flowing down from plate to plate is sprayed into droplets by flue gas on the plate, so that there is a large contact area between gas and liquid. The heat in the flue gas is fully exchanged with the liquid droplets, and the liquid droplets rotate under the drive of the airflow, and the centrifugal force generated strengthens the contact between the gas and the liquid. liquid contact to exchange heat. Due to the good gas-liquid contact conditions provided in the tower, acid gases such as SO2 in the gas are absorbed by the (alkaline) liquid in the tower. It is adhered by water mist on the swirl tray, and is removed by the centrifugal force to the tower wall, so it has a high efficiency of dust removal and mist removal. When the mist-containing gas passes through the defogging plate 4 at a certain speed, it will collide with the defogging plate 4 and adhere to its surface. Fog on the surface of the defogging plate 4 will gradually gather through diffusion and the effect of gravity, and will separate from the defogging plate 4 when the weight reaches a certain level. Therefore, the defogging plate 4 will further ensure efficient defogging performance, so as to prevent the flue gas from carrying water and heat away.

Claims (8)

1. rotating stream tray scrubber heat exchanger; It is characterized in that comprise heat exchange columns body, shower nozzle, eddy flow plate, demist plate, water pump, heat exchanger and the high temperature storage tank of tubular hollow, the lower sides of described heat exchange columns body is provided with into mouth; The top of heat exchange columns body is provided with outlet flue; Described shower nozzle is arranged in the heat exchange columns and is connected to the delivery outlet of heat exchanger heat release section through water pipe, and described eddy flow plate is arranged in the heat exchange columns and is in the below of shower nozzle, and described demist plate is arranged in the heat exchange columns and is in the top of shower nozzle; The input of described water pump is connected on the side walls of heat exchange columns through water pipe; The output of water pump is connected to the input port of heat exchanger endotherm section through water pipe, and the input port of described heat exchanger endotherm section connects external water source, and the delivery outlet of heat exchanger endotherm section connects the high temperature storage tank through water pipe.

2. a kind of rotating stream tray scrubber heat exchanger according to claim 1; It is characterized in that; Described eddy flow plate is the turbine-like Circular fan that is provided with the multi-disc blade; Eddy flow plate middle part is circular eddy flow blind plate, and the opening line of blade ring between middle part eddy flow blind plate setting and each blade is the tangent line of eddy flow blind plate.

3. a kind of rotating stream tray scrubber heat exchanger according to claim 1; It is characterized in that; Described demist plate is the turbine-like Circular fan that is provided with the multi-disc blade; Demist plate middle part is circular demist blind plate, and the opening line of blade ring between middle part demist blind plate setting and each blade is the tangent line of demist blind plate.

4. a kind of rotating stream tray scrubber heat exchanger according to claim 1 is characterized in that, the quantity of described eddy flow plate is 2-6, and the quantity of demist plate is 1.

5. a kind of rotating stream tray scrubber heat exchanger according to claim 1 is characterized in that, the described opening direction that advances mouth is the tangential direction of heat exchange columns body outer wall.

6. a kind of rotating stream tray scrubber heat exchanger according to claim 1 is characterized in that, described to advance mouth downward-sloping and from the horizontal by 5-10 ° angle.

7. a kind of rotating stream tray scrubber heat exchanger according to claim 1 is characterized in that the bottom of described heat exchange columns body is provided with the sewage draining exit that is used for blowdown.

8. a kind of rotating stream tray scrubber heat exchanger according to claim 1 is characterized in that, described heat exchange columns body, demist plate and eddy flow plate are to be processed by stainless steel 316L material or ND steel or polymer composite.

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