White smoke plume eliminating structure of steam condensate box

Abstract

The utility model discloses a steam condensate box white smoke plume eliminating structure which comprises a condensate box and further comprises a discharge pipe, a spray head, a water pump, a PLC and a liquid level sensor, the discharge pipe comprises an inner pipe and an outer pipe, the inner pipe is coaxially arranged in the outer pipe, the outer walls of the two ends of the inner pipe are fixed to the inner wall of the outer pipe through annular sealing plates respectively, and the spray head is arranged on the inner wall of the outer pipe. A circulating cavity is formed between the inner pipe and the outer pipe, the upper portion and the lower portion of one side of the circulating cavity are communicated with a circulating water return pipe and a circulating water inlet pipe respectively, and the bottom end of the inner pipe is communicated with the top of the condensate box. A water inlet of the water pump is communicated with the interior of the condensate box through a pipeline, a water outlet of the water pump is connected with one end of the spraying pipe, the other end of the spraying pipe is communicated with the nozzle, the nozzle is arranged at the top end of the inner pipe, and a spout of the nozzle faces the interior of the inner pipe. The device has the advantages that indirect contact heat exchange of cooling circulating water to steam and direct contact heat exchange of spraying are utilized, steam emission is reduced, and white smoke plume is reduced.

Description

Technical field:

[0001] The utility model relates to the field of environmental protection, in particular to a structure for eliminating white smoke plumes in a steam condensate tank. Background technology:

[0002] The coking furnace production process generates a large amount of steam, and after the steam is pre-cooled, condensate is formed and collected in the condensate tank through the drain pipe. Due to the failure of some steam traps, steam is accompanied by the condensate during the discharge process, resulting in a large amount of steam in the condensate tank. A large amount of steam is discharged from the condensate tank discharge pipe, and a large amount of steam forms a white plume. The white steam plume cools down and turns into liquid, which also causes a waste of water resources. At the same time, the white plume also makes the surrounding working environment smoky and the air visibility low, which brings visual impact. Utility model content:

[0003] The utility model aims to provide a structure for eliminating white smoke plumes in a steam condensate tank.

[0004] The utility model is implemented by the following technical solutions:

[0005] A structure for eliminating white smoke plumes from a steam condensate tank includes a condensate tank, a discharge pipe, a nozzle, a water pump, a PLC controller, and a liquid level sensor. The discharge pipe includes an inner pipe and an outer pipe. The inner pipe is coaxially disposed within the outer pipe. The outer walls of both ends of the inner pipe are fixed to the inner wall of the outer pipe via annular sealing plates. A circulation cavity is formed between the inner and outer pipes. One side of the circulation cavity is connected to a circulating water return pipe and a circulating water inlet pipe at the top and bottom, respectively. The bottom end of the inner pipe is connected to the top of the condensate tank.

[0006] The water inlet of the water pump is connected to the interior of the condensate tank through a pipe, the water outlet of the water pump is connected to one end of the spray pipe, the other end of the spray pipe is connected to the spray head, the spray head is placed at the top end of the inner tube, and the nozzle of the spray head is facing the inside of the inner tube;

[0007] The liquid level sensor is provided in the condensate tank, a discharge pipe is connected to one side of the spray pipe, an electric control valve is provided on the discharge pipe, the signal output end of the liquid level sensor is connected to the signal input end of the PLC controller, and the PLC controller is electrically connected to the electric control valve.

[0008] Preferably, a plurality of connecting tubes are provided inside the inner tube, and both ends of the connecting tubes are connected to the circulation cavity.

[0009] Preferably, a flow meter is provided on the spray pipe, and a signal output end of the flow meter is connected to a signal input end of the PLC controller.

[0010] Advantages of the utility model: The technology of the present application utilizes cooling circulating water for indirect contact heat exchange with steam, and spraying for direct contact heat exchange, which reduces steam exhaust, reduces white smoke plume, and also recycles condensed water, avoiding waste of water resources and eliminating the impact on the working environment. Description of the drawings:

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] In the figure: discharge pipe 1, inner pipe 1.1, outer pipe 1.2, annular sealing plate 1.3, circulation chamber 1.4, circulating water return pipe 1.5, circulating water inlet pipe 1.6, connecting pipe 1.7, sprinkler 2, water pump 3, PLC controller 4, liquid level sensor 5, spray pipe 6, discharge pipe 7, electric control valve 8, flow meter 9, condensate tank 10. Specific implementation method:

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] like Figure 1 As shown, a structure for eliminating white smoke plumes from a steam condensate tank includes a condensate tank 10, a discharge pipe 1, a nozzle 2, a water pump 3, a PLC controller 4, and a liquid level sensor 5. The discharge pipe 1 includes an inner pipe 1.1 and an outer pipe 1.2. The inner pipe 1.1 is coaxially disposed within the outer pipe 1.2. The outer walls of both ends of the inner pipe 1.1 are fixed to the inner wall of the outer pipe 1.2 via annular sealing plates 1.3. A circulation cavity 1.4 is formed between the inner pipe 1.1 and the outer pipe 1.2. One side of the circulation cavity 1.4 is connected to a circulating water return pipe 1.5 and a circulating water inlet pipe 1.6 at the top and bottom, respectively. A plurality of connecting pipes 1.7 are provided inside the inner pipe 1.1. Both ends of the connecting pipes 1.7 are connected to the circulation cavity 1.4. The bottom end of the inner pipe 1.1 is connected to the top of the condensate tank.

[0016] A large amount of steam in the condensate tank 10 is discharged upward from the inner tube 1.1 of the discharge pipe 1. The coking process has multiple heat exchange sections, and cooling circulating water is used to reduce the temperature. In this case, the cooling circulating water can be connected to the circulating water inlet pipe 1.6, and the cooling circulating water flows into the circulation cavity 1.4 and is discharged from the circulating water return pipe 1.5. The steam contacts the wall of the inner tube 1.1, exchanges heat with the cooling circulating water, and then cools down, condenses, and flows back to the condensate tank 10.

[0017] The plurality of connecting pipes 1.7 increase the heat exchange between the cooling circulating water and the steam, and also make the temperature distribution of the cooling circulating water in the circulation cavity 1.4 relatively uniform.

[0018] The water inlet of the water pump 3 is connected to the interior of the condensate tank 10 through a pipe, and the water outlet of the water pump 3 is connected to one end of the spray pipe 6. The other end of the spray pipe 6 is connected to the nozzle 2. The nozzle 2 is placed at the top of the inner tube 1.1, and the nozzle of the nozzle 2 faces the inner tube 1.1.

[0019] The condensate in the condensate tank 10 is sent to the spray pipe 6 by the water pump 3, and sprayed downward from the nozzle 2 toward the steam in the inner tube 1.1. The condensate has a certain temperature, but is lower than the steam temperature, so it can exchange heat. After the condensate exchanges heat, the steam cools down and condenses and then flows downward back to the condensate tank 10.

[0020] A liquid level sensor 5 is provided in the condensate tank 10. A discharge pipe 7 is connected to one side of the spray pipe 6. An electric control valve 8 is provided on the discharge pipe 7. The signal output end of the liquid level sensor 5 is connected to the signal input end of the PLC controller 4. The PLC controller 4 is electrically connected to the electric control valve 8.

[0021] The water level in the condensate tank 10 rises, and the liquid level sensor 5 senses it and feeds back a signal to the PLC controller 4. The PLC controller 4 controls the electric control valve 8 to open, and part of the condensate enters the discharge pipe 7 from the spray pipe 6. The discharge pipe 7 is connected to other water systems and is recycled.

[0022] A flow meter 9 is provided on the spray pipe 6, and the signal output end of the flow meter 9 is connected to the signal input end of the PLC controller 4 to ensure the water output of the spray pipe 6. The flow meter 9 is set for monitoring. Since the discharge pipe 7 will discharge condensate, affecting the water output of the spray pipe 6, the lower limit of the water output of the spray pipe 6 can be set. When the water output is lower than the lower limit, the flow meter 9 sends a signal to the PLC controller 4, and the PLC controller 4 drives the electric control valve 8 to adjust the opening and closing degree, adjust the water output of the discharge pipe 7, and thereby restore the water output of the spray pipe 6. The opening and closing degree of the electric control valve 8 can be set to a fixed angle.

[0023] Working Principle: When the present invention is in use, the excess steam in the condensate tank 10 is discharged upward from the inner tube 1.1 of the discharge pipe 1. The steam contacts the wall of the inner tube 1.1 and is heat-exchanged by the cooling circulating water. The steam is cooled and condensed and then flows downward back to the condensate tank 10. At the same time, the water pump 3 sends the condensate in the condensate tank 10 to the nozzle 2 to spray downward toward the steam. After heat-exchanging with the condensate, the steam is cooled and condensed and then flows downward back to the condensate tank 10, thereby reducing the amount of steam discharged and eliminating white smoke plume.

[0024] The condensate after steam heat exchange flows back to the condensate tank 10, causing the water level in the condensate tank 10 to rise. At this time, the liquid level sensor 5 is used to sense and control the electric control valve 8 to open, and part of the condensate is discharged from the discharge pipe 7 to other water systems for effective utilization.

[0025] The flow meter 9 sends a signal to the PLC controller 4 , which drives the electric control valve 8 to adjust the opening and closing degree, adjust the water output of the discharge pipe 7 , and restore the water output of the spray pipe 6 .

[0026] The technology of the present application utilizes cooling circulating water for indirect contact heat exchange with steam, and spraying for direct contact heat exchange, thereby reducing steam exhaust and white smoke plume, and recycling condensed water to avoid water resource waste while eliminating the impact on the working environment.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A structure for eliminating white smoke plumes from a steam condensate tank, comprising a condensate tank, characterized in that: It also includes a discharge pipe, a nozzle, a water pump, a PLC controller, and a liquid level sensor. The discharge pipe includes an inner pipe and an outer pipe. The inner pipe is coaxially arranged in the outer pipe. The outer walls of both ends of the inner pipe are fixed to the inner wall of the outer pipe through annular sealing plates. A circulation cavity is formed between the inner pipe and the outer pipe. One side of the circulation cavity is connected to the circulating water return pipe and the circulating water inlet pipe at the top and bottom, respectively. The bottom end of the inner pipe is connected to the top of the condensate tank. The water inlet of the water pump is connected to the interior of the condensate tank through a pipeline, the water outlet of the water pump is connected to one end of a spray pipe, the other end of the spray pipe is connected to the spray head, the spray head is placed at the top end of the inner tube, and the nozzle of the spray head faces the inner tube; The liquid level sensor is arranged in the condensate tank, a discharge pipe is connected to one side of the spray pipe, an electric control valve is arranged on the discharge pipe, a signal output end of the liquid level sensor is connected to a signal input end of the PLC controller, and the PLC controller is electrically connected to the electric control valve.

2. The structure for eliminating white smoke plume from a steam condensate tank according to claim 1, characterized in that: A plurality of connecting tubes are arranged inside the inner tube, and both ends of the connecting tubes are connected with the circulation cavity.

3. The structure for eliminating white smoke plume from a steam condensate tank according to claim 2, characterized in that: A flow meter is provided on the spray pipe, and a signal output end of the flow meter is connected to a signal input end of the PLC controller.

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