Boiler flue gas temperature control device for bleaching and dyeing

Abstract

The utility model relates to the technical field of energy conservation and environmental protection, in particular to a boiler flue gas temperature control device for bleaching and dyeing, which comprises a gas inlet pipe, a dust removal device, an exhaust pipe and the like. One side of the dust removal device communicates with an air inlet pipe, the other side of the dust removal device communicates with an exhaust pipe, the air inlet pipe communicates with a cold air pipe, a fan is arranged in the cold air pipe, the water tank communicates with a liquid output pipe, the tail end of the liquid output pipe communicates with a water spraying pipe, and the water spraying pipe penetrates through the cold air pipe and extends into the air inlet pipe; the part, penetrating through the cold air pipe, of the water spraying pipe is arranged above an air opening of the fan. External air is injected into the air inlet pipe through the fan and is mixed with high-temperature gas in the air inlet pipe, so that the temperature of the mixed gas is reduced, liquid in the water tank is sprayed into the air inlet pipe through the water spraying pipe, the temperature of the mixed gas in the air inlet pipe is further reduced, and the temperature of flue gas is controlled; therefore, a cloth bag in the bag type dust collector is prevented from being damaged due to high temperature.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy -conserving and environment -friendly technical field especially relates to a boiler flue gas temperature control device for bleaching and dyeing. BACKGROUND

[0002] The bag type dust collector is an indispensable key component in the boiler flue gas treatment system for bleaching and dyeing, and its main function is to efficiently separate and capture particulate matters, including dust, smoke dust and other solid suspended matters, from the flue gas, significantly reducing the pollutants discharged into the atmosphere to achieve strict environmental protection emission standards. The core of this process lies in using porous cloth bags as filter media to allow clean gas to pass freely while effectively intercepting and depositing particulate matters to maintain air quality. In the bleaching and dyeing industry, the boiler is the heat source that provides steam to support processes such as dyeing, setting, drying, etc. The flue gas generated during its operation has extremely high temperature.

[0003] However, most of the current boiler flue gas treatment systems for bleaching and dyeing do not have effective flue gas cooling measures, which poses a serious threat to the discharge pipeline and cloth bag due to high-temperature flue gas. Not only does it accelerate the aging of the pipeline and shorten its service life, but more critically, the high-temperature flue gas may directly scald the cloth bag during the filtration process, severely affecting the continuous operation and filtration performance of the bag type dust collector. Therefore, there is an urgent need for a boiler flue gas temperature control device for bleaching and dyeing that prevents cloth bags from being scalded by high-temperature flue gas. SUMMARY

[0004] The utility model discloses in order to overcome the current boiler flue gas treatment system for bleaching and dyeing lacks effective flue gas cooling measures, resulting in cloth bag being easily scalded by high-temperature flue gas's shortcoming, the utility model provides a boiler flue gas temperature control device for bleaching and dyeing that prevents cloth bags from being scalded by high-temperature flue gas.

[0005] The utility model discloses a technical scheme: in order to solve the above technical problem, the utility model provides a kind of boiler flue gas temperature control device for bleaching and dyeing, including dust collector, intake pipe, exhaust pipe, fan, liquid output pipe, water spraying pipe, cold air pipe and water tank, dust collector side is connected with intake pipe, and dust collector other side is connected with exhaust pipe, and intake pipe is connected with cold air pipe, and fan is arranged in cold air pipe, and water tank is connected with liquid output pipe, and the tail end of liquid output pipe is connected with water spraying pipe, and water spraying pipe penetrates cold air pipe and extends into intake pipe, and the part of water spraying pipe that penetrates cold air pipe is located above fan air port.

[0006] Preferably, it further includes a baffle, the baffle is arranged in the intake pipe, the baffle is arranged below the water spraying port of the water spraying pipe, a communication passage is arranged between the intake pipe and the water tank, and the baffle is arranged at the communication passage of the intake pipe and the water tank. The baffle blocks the liquid sprayed by the water spraying pipe in the intake pipe and flows back to the water tank through the communication passage between the intake pipe and the water tank.

[0007] Preferably, a return air pipe is further included, the top of the air inlet pipe is communicated with the return air pipe, and the air inlet of the return air pipe is opposite to the air outlet of the cold air pipe.

[0008] Preferably, the water tank is symmetrically provided with refrigeration fins on both sides.

[0009] Preferably, the water tank is provided with a water inlet at the top.

[0010] Preferably, the water tank is provided with a water valve at the bottom.

[0011] Preferably, the air inlet pipe is inclined.

[0012] The utility model discloses the beneficial effects of:

[0013] The fan pours the outside air into the air inlet pipe and mixes with the high-temperature gas in the air inlet pipe, thereby reducing the temperature of the mixed gas, and the liquid in the water tank is sprayed into the air inlet pipe through the water spraying pipe, further reducing the temperature of the mixed gas in the air inlet pipe, thereby controlling the flue gas temperature, and avoiding the damage of the cloth bag in the bag-type dust collector due to high temperature. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0015] Figure 2 It is the three-dimensional structure schematic diagram of the air inlet pipe, the cold air pipe, the return air pipe and the baffle of the utility model.

[0016] Figure 3 It is the three-dimensional structure schematic diagram of the liquid output pipe and the water spraying pipe of the utility model.

[0017] The marks in the drawings are: 1-dust removal device, 2-air inlet pipe, 3-fan, 31-liquid output pipe, 32-water spraying pipe, 4-cold air pipe, 41-return air pipe, 5-baffle, 51-water tank, 52-refrigeration fin, 53-water inlet, 54-water valve, 6-exhaust pipe. DETAILED DESCRIPTION

[0018] The utility model will be further described below in combination with the drawings and examples.

[0019] Example 1: a boiler flue gas temperature control device for dyeing, as shown in Figure 1 、 Figure 2 and Figure 3As shown, including dust removal device 1, air inlet pipe 2, exhaust pipe 6, fan 3, liquid output pipe 31, water spray pipe 32, cold air pipe 4 and water tank 51, dust removal device 1 is used to remove particulate matter and dust in flue gas, to reduce pollution to the environment and protect subsequent processing equipment from wear or blockage, the left side of dust removal device 1 is communicated with air inlet pipe 2, the high temperature flue gas generated by the boiler enters the inside of dust removal device 1 through air inlet pipe 2, the right side of dust removal device 1 is communicated with exhaust pipe 6, the cleaned gas is discharged through exhaust pipe 6, air inlet pipe 2 is communicated with cold air pipe 4, fan 3 is arranged in cold air pipe 4, fan 3 blows the cooled air from cold air pipe 4 into air inlet pipe 2, the cold air provided by fan 3 is mixed with high temperature flue gas, the temperature of flue gas is reduced by heat exchange, water tank 51 is communicated with liquid output pipe 31, the end of liquid output pipe 31 is communicated with water spray pipe 32, water spray pipe 32 penetrates through cold air pipe 4 and extends into air inlet pipe 2, water spray pipe 32 sprays water mist into flue gas in air inlet pipe 2 through spray head, the water mist can absorb heat in flue gas, evaporate rapidly and take away a large amount of heat, so as to rapidly reduce the temperature of flue gas, liquid output pipe 31 is used to ensure continuous water supply, the part of water spray pipe 32 penetrating through cold air pipe 4 is arranged above the air inlet of fan 3, which is beneficial to the mixing of cold air and water mist and further promotes heat exchange.

[0020] As shown in Figure 2 It also includes a baffle 5, the baffle 5 is arranged in the air inlet pipe 2, the baffle 5 is arranged below the water spray port of the water spray pipe 32, a communication passage is arranged between the air inlet pipe 2 and the water tank 51, the baffle 5 is arranged at the communication position of the air inlet pipe 2 and the water tank 51, the baffle 5 blocks the liquid sprayed by the water spray pipe 32 in the air inlet pipe 2 and returns to the water tank 51 through the communication passage between the air inlet pipe 2 and the water tank 51.

[0021] As shown in Figure 2 It also includes a return air pipe 41, the return air pipe 41 is communicated with the top of the air inlet pipe 2, the air inlet of the return air pipe 41 is opposite to the air outlet of the cold air pipe 4, which is used to return part of the cooled flue gas to the inlet of the fan 3 and mix with the newly entered air to form a circulating air cooling effect.

[0022] As shown in Figure 1 It also includes a refrigeration fin 52, the refrigeration fin 52 is arranged symmetrically on both sides of the water tank 51, which is used to cool the water in the water tank 51 and prepare for the cooling process.

[0023] First, the high-temperature flue gas generated by the boiler operation enters the inlet pipe 2, at this time the heat carried by the flue gas is larger, the refrigeration piece 52 starts to work, and the cooling water in the water tank 51 is lowered to a lower temperature, ready to participate in the cooling process, then the fan 3 starts, pushing the outside air through the cold air pipe 4 into the inlet pipe 2, forming a reverse flow with the high-temperature flue gas, the cold air absorbs the heat in the flue gas, and the flue gas temperature is preliminarily reduced, at the same time, the cooling water in the water tank 51 is sent to the water spraying pipe 32 through the liquid output pipe 31, the water spraying pipe 32 is atomized and sprayed onto the flue gas in the inlet pipe 2, the water mist and the flue gas are in full contact, and the flue gas temperature is further reduced through evaporation heat absorption, part of the cooled flue gas flows back to the fan 3 inlet through the return air pipe 41, mixed with the newly entered air, forming a circulating air cooling effect, further improving the cooling efficiency, the baffle 5 arranged on the inner wall of the inlet pipe 2 blocks the liquid sprayed by the water spraying pipe 32 in the inlet pipe 2 and returns to the water tank 51 through the communication channel between the inlet pipe 2 and the water tank 51, realizing the recycling of the cooling water, after the above cooling process, the flue gas temperature is effectively controlled, and after reaching the safe discharge standard, the flue gas is filtered by the dust removal device 1 to remove the remaining particulate matter, and finally discharged through the exhaust pipe 6, ensuring environmental protection and equipment safety.

[0024] Example 2: Based on example 1, as shown in Figure 1 The water inlet 53 and the water change valve 54 are also included, the water inlet 53 is arranged at the top of the water tank 51, which facilitates the replenishment of the water loss due to the cooling of the flue gas and the evaporation, ensuring the cooling capacity of the water tank 51, the water change valve 54 is arranged at the bottom of the water tank 51, which is used for periodic discharge of old water, and the impurities are removed by introducing fresh cooling water, maintaining the purity of the water, thereby ensuring the efficient cooling performance and long-term stable operation of the system, the inlet pipe 2 is arranged obliquely, which is beneficial to the smooth discharge of the condensed water generated in the cooling process and the sprayed cooling water, avoiding the problems of increased flue gas flow resistance and accelerated metal pipeline corrosion caused by accumulated water, especially in high-temperature and hot conditions, this design not only reduces the maintenance requirements, but also enhances the reliability and safety of the system.

[0025] During the cooling process, the cooling water will gradually decrease due to evaporation and spraying, and part of the cooling water will naturally flow away through the drainage system over time. Therefore, it is necessary to periodically supplement the cooling water through the water inlet 53 to maintain the liquid level balance inside the system. During the recycling of the cooling water, impurities, mineral deposits, and other contaminants may gradually accumulate. The accumulation of these impurities not only weakens the cooling effect, but also may cause waterway blockage and accelerate equipment corrosion. Regularly activating the water change valve 54 to discharge old water and supplement fresh cooling water can effectively remove these impurities, ensure the purity of the cooling water, and thus ensure the cooling efficiency and long-term stability of the system. In view of the condensate water generated during the cooling process and the sprayed cooling water, if the air inlet pipe 2 is designed to be horizontally placed, the condensate water and the cooling water are not easy to drain, and are easy to accumulate in the pipeline, increasing the resistance of flue gas flow. In addition, in a high-temperature and hot environment, accumulated water will increase the risk of corrosion of metal pipelines. The air inlet pipe 2 adopts a layout from left to right, which utilizes gravity to assist the condensate water and the cooling water to smoothly flow to the water tank 51, effectively prevents water accumulation, reduces the probability of corrosion and blockage, and enhances the reliability of the system and simplifies the daily maintenance work.

[0026] The above-described embodiments only express the preferred embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications, improvements, and substitutions can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A temperature control device for the exhaust gas of a dyeing boiler, comprising a dust removal device (1), an air inlet pipe (2) and an air outlet pipe (6), the air inlet pipe (2) being connected to one side of the dust removal device (1), and the air outlet pipe (6) being connected to the other side of the dust removal device (1), characterized in that, The air inlet pipe (2) is communicated with the cold air pipe (4), the fan (3) is arranged in the cold air pipe (4), the water tank (51) is communicated with the liquid outlet pipe (31), the end of the liquid outlet pipe (31) is communicated with the water spraying pipe (32), the water spraying pipe (32) penetrates through the cold air pipe (4) and extends into the air inlet pipe (2), and the part of the water spraying pipe (32) penetrating through the cold air pipe (4) is arranged above the air outlet of the fan (3).

2. A temperature control device for the exhaust gas of a dyeing boiler according to claim 1, characterized in that, The air inlet pipe (2) is communicated with the cold air pipe (4), the fan (3) is arranged in the cold air pipe (4), the water tank (51) is communicated with the liquid outlet pipe (31), the end of the liquid outlet pipe (31) is communicated with the water spraying pipe (32), the water spraying pipe (32) penetrates through the cold air pipe (4) and extends into the air inlet pipe (2), and the part of the water spraying pipe (32) penetrating through the cold air pipe (4) is arranged above the air outlet of the fan (3).

3. A temperature control device for the exhaust gas of a dyeing boiler according to claim 2, characterized in that, The air inlet pipe (2) is communicated with the cold air pipe (4), the fan (3) is arranged in the cold air pipe (4), the water tank (51) is communicated with the liquid outlet pipe (31), the end of the liquid outlet pipe (31) is communicated with the water spraying pipe (32), the water spraying pipe (32) penetrates through the cold air pipe (4) and extends into the air inlet pipe (2), and the part of the water spraying pipe (32) penetrating through the cold air pipe (4) is arranged above the air outlet of the fan (3).

4. A temperature control device for the exhaust gas of a dyeing and bleaching boiler according to claim 3, characterized in that, The water tank (51) is provided with the refrigeration sheet (52) on both sides in a symmetrical mode.

5. A temperature control device for the exhaust gas of a dyeing boiler according to claim 4, characterized in that, The water tank (51) is provided with the water injection opening (53) on the top.

6. A temperature control device for the exhaust gas of a dyeing boiler according to claim 5, characterized in that, The water tank (51) is provided with the water changing valve (54) on the bottom.

7. A temperature control device for the exhaust gas of a dyeing boiler according to claim 6, characterized in that, The air inlet pipe (2) is arranged in an inclined mode.

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