Fire-retardant spraying device for inlet flue of cooling tempering tower

Abstract

The utility model provides a fire-retardant spraying device for an inlet flue of a cooling and tempering tower, and particularly relates to the technical field of fire-retardant spraying of cooling and tempering towers, which comprises a cooling tower main body, a spraying system, a hot water system, a control system and a temperature detection system, the cooling tower is characterized in that the upper end and the lower end of the cooling tower body are connected with a smoke outlet flue and a smoke inlet flue respectively, a spraying system is arranged in one end of the smoke inlet flue and comprises a main pipe, branch pipes, vortex nozzles and a blocking plate, the main pipe penetrates through the surface of the smoke inlet flue and extends into the smoke inlet flue, the main pipe is connected with a plurality of branch pipes, the vortex nozzles are arranged on the end face of each branch pipe, and the blocking plate is connected with the main pipe. The end point of the main pipe is blocked by a blocking plate; the vortex nozzle conical structure arranged in the inlet flue is matched with the double clean water pumps to supply pressure, so that superfine water mist particles are formed, instant heat absorption vaporization is realized, high-temperature flue gas with the temperature higher than 280 DEG C can be quickly cooled, and the fire retardance efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of fire-retardant spraying technology for cooling and conditioning towers, specifically to a fire-retardant spraying device for the inlet flue of a cooling and conditioning tower. Background Technology

[0002] In carbon production, tobacco processing, chemical production, and high-temperature flue gas treatment, conditioning towers are key equipment used for cooling and conditioning high-temperature flue gas. During carbon production, the flue gas temperature at the workshop outlet is high; after cooling and preliminary dust removal, it undergoes desulfurization and denitrification treatment systems.

[0003] Large-scale carbon plants have multiple workshops, such as calcination, roasting, and molding. The flue gas from different workshops varies greatly (directly increasing the treatment capacity of the conditioning tower is uneconomical). When the temperature of the flue gas at the inlet of the cooling and conditioning tower exceeds 280°C, it may cause a fire hazard. Moreover, existing spraying devices generally have problems with low cooling efficiency and poor fire-resistant effect.

[0004] Currently, most mainstream flame arresters use metal wire mesh or corrugated plate flame arresters, which achieve flame blocking by installing multiple layers of flame arresters in the flue. However, these mechanical flame arresters have serious drawbacks: the densely arranged flame arresting elements cause the gas flow channel to contract sharply, easily increasing pressure loss. This forces the system to be equipped with a high-power booster fan to maintain gas delivery efficiency, which not only significantly increases equipment purchase costs but also causes excessively high energy consumption during long-term operation.

[0005] While existing technologies have attempted to use water mist spraying for cooling and fire suppression, conventional pressure nozzles rely on high-pressure water supply systems for effective atomization. Conventional fire-suppressing spray devices often employ direct-injection nozzles or ordinary atomization structures, resulting in large atomized particles and limited coverage, leading to uneven cooling and difficulty in quickly suppressing the spread of fire hazards from high-temperature flue gas. Furthermore, direct spraying of cold water in existing technologies can easily cause corrosion within the flue structure, and the contact between low-temperature water and high-temperature flue gas may generate sudden cooling stress, affecting the equipment's service life.

[0006] While existing spray systems address the aforementioned issues, their simple structure, limited nozzle atomization, and lack of integrated warm water circulation and multi-stage temperature detection and interlocking control make it difficult to achieve the dual goals of efficient flame arrest and equipment protection. Furthermore, the absence of dynamic monitoring for flue pressure changes can easily lead to overpressure damage to the equipment. Therefore, a flame-arresting spray device for the inlet flue of a cooling and conditioning tower is needed, one that achieves efficient atomization, precise warm water temperature control, and multi-stage temperature detection and control. Utility Model Content

[0007] The purpose of this invention is to provide a flame-retardant spray device for the inlet flue of a cooling and conditioning tower, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a flame-retardant spray device for the inlet flue of a cooling and conditioning tower, comprising a cooling tower body, a spray system, a hot water system, a control system, and a temperature detection system, characterized in that: the upper and lower ends of the cooling tower body are respectively connected to an outlet flue and an inlet flue, and a spray system is provided inside one end of the inlet flue, comprising a main pipe, branch pipes, vortex nozzles, and a sealing plate, the main pipe extending through the surface of the inlet flue and into the interior, and several branch pipes are connected to the main pipe, each branch pipe having a vortex nozzle at its end face, and the end of the main pipe being sealed by a sealing plate;

[0009] The hot water system includes a hot water tank consisting of clean water pipes and hot water pipes connected in series, two clean water pumps connected in series with the hot water pipes, and a heating device installed at the bottom of the hot water tank.

[0010] The control system and the temperature detection system are connected by signals and are respectively installed on each pipeline. When the temperature detection system detects a temperature ≥280℃, the clean water pump is started to spray atomized water through the vortex nozzle.

[0011] Preferably, the vortex nozzle adopts a conical atomizing structure, which greatly improves the atomization spraying effect. One end of the main pipe is connected to the hot water pipe through the spray main pipe inlet valve. With the combined pressure of two clean water pumps, the vortex nozzle achieves a more efficient spraying effect.

[0012] Preferably, a heating device is provided at the bottom of the hot water tank, which is heated by a steam coil or a heat transfer oil coil to maintain the water temperature at around 60°C. Furthermore, a temperature display device is provided outside the hot water tank to monitor the heating temperature in real time.

[0013] Preferably, the clean water pipe is located on one side of the upper end of the hot water tank to provide clean water for the hot water tank, and a hot water pipe is located on the other side of the lower end of the hot water tank. A drain pipe is located below the hot water pipe to drain the remaining water in the hot water tank after the work is completed, so as to avoid long-term accumulation and improve the service life of the equipment.

[0014] Preferably, the control system includes a solenoid valve and a manual ball valve. The solenoid valve is respectively located before and after the water pump. When the water temperature reaches the temperature set by the temperature detection system, it automatically switches between open and closed states. The manual ball valve is located on the side of the solenoid valve near the hot water tank. It is used to manually close and open the solenoid valve when it is damaged or reaches the warranty period, without affecting production efficiency.

[0015] Preferably, the temperature detection system includes temperature transmitter A, temperature transmitter B, and temperature transmitter C. Temperature transmitter A is installed at the front end of the flue gas inlet of the spray system and is used to start the spray system for atomized spraying when the temperature in the flue gas inlet reaches ≥280℃. Temperature transmitter B is installed above the flue gas outlet and is used to monitor the temperature in the flue gas outlet in real time to see if it has reached the set safety value. Temperature transmitter C is installed at the connection between the hot water pipe and the hot water tank and is used to detect whether the water temperature in the hot water tank has reached about 60℃. When the set temperature is reached, temperature transmitter C controls the solenoid valve to open so that warm water enters the clean water pump.

[0016] Preferably, a pressure transmitter is provided on one side of the temperature transmitter B to detect pressure changes inside the flue and reduce equipment failure rate.

[0017] Preferably, the ends of the flue and the exhaust duct are respectively provided with a flue inlet and a flue outlet, which facilitates connection to external pipes or connection to the next process.

[0018] The beneficial effects of this utility model are:

[0019] 1. This utility model uses a conical structure of a vortex nozzle set in the flue gas inlet, combined with pressure from two clean water pumps, to form ultra-fine water mist particles, achieving instantaneous heat absorption and vaporization, which can quickly cool down high-temperature flue gas above 280°C and greatly improve flame-retardant efficiency.

[0020] 2. Three-level temperature sensor linkage control: Temperature transmitter A enables the spray system to start at valve shaft when the flue gas temperature is ≥280℃; Temperature transmitter B dynamically monitors temperature fluctuations in the flue gas outlet; Temperature transmitter C precisely regulates the water temperature in the hot water tank; The pressure transmitter automatically triggers an alarm when it detects abnormal pressure fluctuations in the flue gas outlet, reducing equipment failure rate.

[0021] 3. The system adopts dual-mode control with both solenoid valves and manual ball valves to improve the continuity of equipment production. Furthermore, the hot water tank recovers waste heat through steam coils or heat transfer oil coils, which is more energy-efficient than electric heating. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of the cooling tower of this utility model.

[0023] Figure 2 This is a schematic diagram of the transverse cross-section of the spray system of this utility model.

[0024] Figure 3 This is a cross-sectional structural diagram of the hot water tank of this utility model.

[0025] The components in the attached diagram are labeled as follows: 1: Cooling tower body; 2: Flue outlet; 3: Flue inlet; 4: Flue outlet; 5: Flue inlet; 6: Spray system; 61: Main pipe; 62: Branch pipe; 63: Vortex nozzle; 64: Sealing plate; 71: Hot water tank; 72: Clean water pipe; 73: Hot water pipe; 74: Clean water pump; 75: Steam coil; 76: Thermal oil coil; 77: Temperature display device; 81: Solenoid valve; 82: Manual ball valve; 91: Temperature transmitter A; 92: Temperature transmitter B; 93: Temperature transmitter C; 10: Spray main pipe inlet valve; 11: Drain pipe; 12: Pressure transmitter. Detailed Implementation

[0026] Although this invention may be described with respect to a particular application or industry, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "above," "below," "upward," "downward," etc., are used to describe the drawings and not to indicate a limitation on the scope of the invention as defined by the appended claims. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0027] This utility model is as follows Figure 1-3 The fire-retardant spray device shown is used for the inlet flue of a cooling and conditioning tower: it includes a cooling tower body 1, a spray system 6, a hot water system, a control system and a temperature detection system. The cooling tower body 1 is cylindrical, and the upper end is connected to the flue outlet 2 through a flange, and the lower end is welded to the flue inlet 3. The spray system 6 is embedded in the flue inlet 3.

[0028] The spray system includes a main pipe 61 made of stainless steel, which runs horizontally through the wall of the flue duct 3. At least three stainless steel branch pipes 62 are welded at equal intervals on the main pipe 61. A vortex nozzle 63 is installed at the end of the branch pipe 62. The vortex nozzle 63 adopts a conical atomizing structure. The nozzle axis is at a 45° angle to the flue gas flow direction to perform atomization and cooling. The end of the main pipe 61 is sealed with a detachable flange sealing plate 64.

[0029] The hot water system uses a vertical hot water tank 71. A steam coil 75 or a thermal oil coil heating device is arranged at the bottom of the hot water tank 71 to recover waste heat, which is more energy-efficient than electric heating. The clean water pipe 72 injects room temperature clean water through the top water inlet. The hot water pipe 73 is connected to two parallel clean water pumps 74 through the bottom outlet. The end of the hot water pipe 74 is connected to the spray main inlet valve 10, and the other end of the spray main inlet valve 10 is connected to the inlet of the main pipe 61, so that the vortex nozzle 63 works with the two clean water pumps 74 to greatly improve the spray pressure and area. In addition, a drain pipe 11 is set below the hot water pipe 73 to drain the remaining water in the hot water tank 71 after the work is completed, so as to avoid long-term accumulation and improve the service life of the equipment.

[0030] The control system includes a solenoid valve 81 and a manual ball valve 82. The solenoid valve 81 is located before and after the water pump 74. When the water temperature reaches the temperature set by the temperature detection system, it automatically switches between open and closed states. The manual ball valve 82 is located on the side of the solenoid valve 81 near the hot water tank 71. It is used to manually close and open the solenoid valve 81 when it is damaged or reaches the warranty period, without affecting production efficiency.

[0031] The temperature detection system includes temperature transmitters A91, B92, and C93. Temperature transmitter A91 is installed at the front end of the flue gas inlet 3 of the spray system 6 and is used to start the spray system 6 for atomized spraying when the temperature in the flue gas inlet 3 reaches ≥280℃. Temperature transmitter B92 is installed above the flue gas outlet 2 and is used to monitor the temperature in the flue gas outlet 2 in real time to see if it has reached the set safety value. Temperature transmitter C93 is installed at the connection between the hot water pipe 73 and the hot water tank 71 and is used to detect whether the water temperature in the hot water tank 71 has reached about 60℃. When the set temperature is reached, temperature transmitter C93 controls the solenoid valve 81 to open so that warm water enters the clean water pump 74. A pressure transmitter 12 is installed on one side of temperature transmitter B92 to detect pressure changes in the flue gas outlet 2 and reduce equipment failure rate.

[0032] Working principle: First, when high-temperature flue gas (≥280℃) enters from the flue gas inlet 5, the temperature transmitter A91 detects the flue gas temperature in real time. When it reaches the ≥280℃ threshold, it sends a signal to the control system and starts two clean water pumps 74. The control system opens the solenoid valve 81 and the spray main inlet valve 10. 60℃ warm water enters the main pipe 61 through the hot water pipe 73 and is delivered to the vortex nozzle 63 through the branch pipe 62. The conical atomizing nozzle covers the entire flue section. The water mist evaporates and absorbs the heat of the flue gas, reducing the temperature to below 200℃ and reducing the dust concentration. The cooled flue gas is discharged through the flue gas outlet 2. The temperature transmitter B92 monitors the outlet temperature. When the temperature transmitter A detects a value less than 250℃, the spray is automatically shut off after a 5-minute delay. The hot water tank 71 maintains the set water temperature through the temperature transmitter C, and the sewage pipe 11 periodically discharges sediment.

[0033] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A flame-retardant spray device for the inlet flue of a cooling and conditioning tower, comprising a cooling tower body (1), a spray system (6), a hot water system, a control system, and a temperature detection system, characterized in that: The cooling tower body (1) is connected to a flue outlet (2) and a flue inlet (3) at its upper and lower ends, respectively. A spray system (6) is installed inside one end of the flue inlet (3), including a main pipe (61), branch pipes (62), vortex nozzles (63) and a sealing plate (64). The main pipe (61) extends through the surface of the flue inlet (3) and into the interior. Several branch pipes (62) are connected to the main pipe (61). Each branch pipe (62) is provided with a vortex nozzle (63) at its end face. The end of the main pipe (61) is sealed by the sealing plate (64). The hot water system includes a hot water tank (71) connected in series with a clean water pipe (72) and a hot water pipe (73), two clean water pumps (74) connected in series with the hot water pipe (73), and a heating device installed at the bottom of the hot water tank (71); The control system and the temperature detection system are connected by signals and are respectively installed on each pipeline. When the temperature detection system detects a temperature ≥280℃, the clean water pump (74) is started and the water is sprayed by the vortex nozzle (63).

2. The flame-retardant spray device for the inlet flue of a cooling and conditioning tower as described in claim 1, characterized in that: The vortex nozzle (63) adopts a conical atomizing structure. One end of the main pipe (61) is connected to the hot water pipe (73) through the spray main pipe inlet valve (10). With the combined pressure of two clean water pumps (74), the vortex nozzle (63) achieves a more efficient spraying effect.

3. The flame-retardant spray device for the inlet flue of a cooling and conditioning tower as described in claim 1, characterized in that: The hot water tank (71) is equipped with a heating device at the bottom, which is heated by a steam coil (75) or a heat transfer oil coil (76) to keep the water temperature in the range of about 60°C. The heating temperature can be monitored in real time by a temperature display device (77) installed outside the hot water tank (71).

4. The flame-retardant spray device for the inlet flue of a cooling and conditioning tower as described in claim 1, characterized in that: The clean water pipe (72) is installed on one side of the upper end of the hot water tank (71) to provide clean water for the hot water tank (71). A hot water pipe (73) is installed on the other side of the lower end of the hot water tank (71). A drain pipe (11) is installed below the hot water pipe (73) to drain the remaining water in the hot water tank (71) after the work is completed.

5. A flame-retardant spray device for the inlet flue of a cooling and conditioning tower as described in claim 1, characterized in that: The control system includes a solenoid valve (81) and a manual ball valve (82). The solenoid valve (81) is located before and after the water pump (74). When the water temperature reaches the temperature set by the temperature detection system, it automatically switches between open and closed states. The manual ball valve (82) is located on the side of the solenoid valve (81) near the hot water tank (71). When the solenoid valve (81) is damaged or reaches the warranty period, the manual ball valve (82) can manually close and open it without affecting production efficiency.

6. The flame-retardant spray device for the inlet flue of a cooling and conditioning tower as described in claim 1, characterized in that: The temperature detection system includes temperature transmitter A (91), temperature transmitter B (92) and temperature transmitter C (93). Temperature transmitter A (91) is installed at the front end of the flue gas inlet (3) of the spray system (6) and is used to start the spray system (6) for atomized spraying when the temperature in the flue gas inlet (3) reaches ≥280℃. Temperature transmitter B (92) is installed above the flue gas outlet (2) and is used to monitor the temperature in the flue gas outlet (2) in real time to see if it reaches the set safety value. Temperature transmitter C (93) is installed at the connection between the hot water pipe (73) and the hot water tank (71) and is used to detect whether the water temperature in the hot water tank (71) reaches about 60℃. When the set temperature is reached, temperature transmitter C (93) controls the solenoid valve (81) to open so that the warm water enters the clean water pump (74).

7. A flame-retardant spray device for the inlet flue of a cooling and conditioning tower as described in claim 6, characterized in that: A pressure transmitter (12) is provided on one side of the temperature transmitter B (92), and the pressure transmitter (12) can detect the pressure change inside the flue (2).

8. A flame-retardant spray device for the inlet flue of a cooling and conditioning tower as described in claim 1, characterized in that: The ends of the inlet flue (3) and outlet flue (2) are respectively provided with inlet (5) and outlet (4) for easy connection with external pipes or connection to the next process.

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