A waste heat recovery and reuse device for tail gas treatment system

Abstract

The utility model relates to the technical field of tail gas treatment of sulfonation reaction, and specifically provides a waste heat recovery and reuse device for a tail gas treatment system, comprising a hot water heater, an electrostatic demister, a collecting tank, and a fan, wherein the input end of the fan is connected to an air supply duct, and the output end is connected to an air blowing duct; the hot water heater is provided with a first interface and a second interface, the first interface is connected to an air pump, and the second interface is connected to the air supply duct; the electrostatic demister is provided with an air blowing port, and the air blowing port is connected to the air blowing duct; the utility model enables the hot gas originally discharged directly into the atmosphere to be collected, blown and reused by adding an air pump, an air supply duct, a air blowing duct and a fan used in conjunction with the hot water heater, and the hot air originally discharged directly into the atmosphere is collected, blown and reused by the fan, and the hot air is sent to the electrostatic demister to sweep the dripping acid mist from the electrode porcelain bottle with hot air, thereby protecting the electrode porcelain bottle, extending the service life of the electrostatic demister, and further reducing the application cost of the tail gas treatment system.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment of sulfonation reaction, in particular to a waste heat recovery and reuse device for a tail gas treatment system. Background Art

[0002] The demand for surfactants is increasing, and the high-temperature sulfonation process is an important means to produce surfactant sulfonation products. However, during the production process of the high-temperature sulfonation process, a large amount of sulfonated tail gas will be generated. These tail gases contain unconverted sulfur dioxide, unreacted sulfur trioxide, sulfuric acid mist and other organic acid mists. If the tail gas is discharged directly, it will cause environmental pollution. Therefore, the tail gas needs to be treated before it is discharged. In the existing technology, electrostatic precipitators and collection tanks are used to treat the tail gas after the sulfonation reaction. However, the large amount of organic acid mist in the electrostatic precipitator will corrode the electrode porcelain bottle during long-term production. Please refer to Figure 1 The traditional method is to add an air preheater, add low-pressure steam to the air preheater to heat the air, and blow away the acid mist dripping on the electrode porcelain bottle, thereby protecting the electrode and extending the service life of the electrostatic precipitator. The addition of an air preheater and the use of steam increase the cost of blowing the electrode porcelain bottle. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a waste heat recovery and reuse device for an exhaust gas treatment system, which is used to solve the problem of high cost of adding an air preheater and using steam to purge electrode porcelain bottles in the prior art.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a waste heat recovery and reuse device for an exhaust gas treatment system, comprising:

[0005] A hot water heater, wherein the hot water heater has a hot water chamber for isolating water and providing a high-temperature sulfonation reaction environment;

[0006] An electrostatic demister, wherein an electrode porcelain bottle is provided in the electrostatic demister for purifying the acid mist tail gas after the high-temperature sulfonation reaction;

[0007] A collecting tank, which is used to collect the black sulfonic acid at the bottom of the electrostatic precipitator;

[0008] It also includes a fan, wherein the input end of the fan is connected to an air supply duct, and the output end of the fan is connected to an air blowing duct;

[0009] The hot water heater is provided with a first interface and a second interface which are connected to the hot water chamber, the first interface is connected to an air pump for supplying air to the hot water chamber; the second interface is connected to an air supply duct for supplying hot air to the fan;

[0010] The electrostatic demister is provided with an air blowing port corresponding to blowing toward the electrode porcelain bottle, and the air blowing port is connected to the air blowing pipeline.

[0011] In one embodiment of the utility model, a thermometer is connected to the air supply duct to detect the temperature of the air after being heated by the hot water heater.

[0012] In one embodiment of the utility model, a pressure gauge is connected to the blowing duct to detect the blowing pressure output by the blower.

[0013] In one embodiment of the present invention, an air regulating valve is provided on the output end of the fan.

[0014] In one embodiment of the present invention, the air outlet is configured as a tapered outlet that is narrow at the top and wide at the bottom.

[0015] In one embodiment of the utility model, the number of the blowing ports is the same as the number of electrode porcelain bottles in the electrostatic precipitator, and a single blowing port corresponds to blowing one electrode porcelain bottle.

[0016] As described above, the waste heat recovery and reuse device for the tail gas treatment system of the utility model has the following beneficial effects:

[0017] The utility model adds an air pump, an air supply duct, an air blowing duct and a fan which are used in conjunction with a hot water heater, so that the hot air originally discharged directly into the atmosphere can be collected, blown and reused, and the fan provides power to send the hot air to the electrostatic demister to sweep the acid mist dripping from the electrode porcelain bottle, thereby protecting the electrode porcelain bottle and extending the service life of the electrostatic demister; this device can save the use of an air preheater and steam, saving application costs. In actual use, taking a one-ton sulfonation device as an example, 100kg of steam can be saved per hour, greatly reducing the cost of exhaust gas treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure shows a schematic diagram of a process for purging an electrode porcelain bottle by adding an air preheater and using steam to heat the air as disclosed in the prior art.

[0019] Figure 2 Shown is a schematic diagram of the process of purging the electrode porcelain bottle of the waste heat recovery and reuse device for the exhaust gas treatment system disclosed in the utility model.

[0020] Component number description

[0021] Hot water heater 1; hot water chamber 11; first interface 12; second interface 13; electrostatic demister 2; electrode porcelain bottle 21; air outlet 22; collecting tank 3; fan 4; air supply duct 5; air blowing duct 6; air pump 7; thermometer 8; pressure gauge 9; air regulating valve 10. DETAILED DESCRIPTION

[0022] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] See also Figure 2 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0024] See also Figure 2 The utility model provides a waste heat recovery and reuse device for an exhaust gas treatment system, including a hot water heater 1, an electrostatic precipitator 2, and a collecting tank 3. The hot water heater 1 has a hot water chamber 11, which is used to isolate water and provide a high-temperature sulfonation reaction environment; the electrostatic precipitator 2 is provided with an electrode porcelain bottle 21, which is used to purify the acid mist exhaust after the high-temperature sulfonation reaction; the collecting tank 3 is used to collect the black sulfonic acid at the bottom of the electrostatic precipitator 2; when used specifically, the organic acid mist generated after the sulfonation reaction occurs under high temperature conditions is sent to the electrostatic precipitator 2, and the key to the electric demisting of the electrostatic precipitator 2 is high-voltage discharge. Under the action of the electric field, the electric field in the electrode porcelain bottle generates plasma discharge to the air, releasing high-energy electrons, colliding with the surrounding air molecules, and ionizing the air molecules. Under the action of the electric field, the ionized air molecules will be freed and collide with the aerosol, and then the aerosol particles will form larger and larger particles. Finally, these particles will be deposited on the electrode plate, achieving the purpose of removing aerosols and purifying organic acid mist; the organic acid mist purified by the electrostatic precipitator 2 forms droplets (black sulfonic acid) and flows to the bottom of the electrostatic precipitator, and is collected by the collection tank 3, thereby achieving the purpose of treating the organic acid mist.

[0025] The waste heat recovery and reuse device for the tail gas treatment system also includes a fan 4, the input end of the fan 4 is connected to an air supply pipe 5, and the output end is connected to a blowing pipe 6; the hot water heater 1 is provided with a first interface 12 and a second interface 13 that pass through the hot water chamber 11, the first interface 12 is connected to an air pump 7 for supplying air to the hot water chamber 11; the second interface 13 is connected to the air supply pipe 5, for supplying hot air to the fan 4; the electrostatic demister 2 is provided with a blowing port 22 corresponding to blowing toward the electrode porcelain bottle 21, and the blowing port 22 is connected to the blowing pipe 6; After the hot water heater 1 provides a water-insulated high-temperature environment for the sulfonation reaction, the residual temperature of the hot water is still relatively high. The air is blown into the hot water cavity by the air pump to heat the air by the residual temperature of the hot water. The hot air enters the fan 4 through the air supply duct 5, and the fan 4 provides power to send the hot air to the electrostatic precipitator 2 to blow the dripping acid mist on the electrode porcelain bottle 21, keep the electrode porcelain bottle 21 dry, thereby protecting the electrode porcelain bottle 21 from being corroded by a large amount of organic acid mist entering the electrostatic precipitator 2, extending the service life of the electrode porcelain bottle 21, and further extending the service life of the electrostatic precipitator 2. The number of the blowing ports 22 is the same as the number of the electrode porcelain bottles 21 in the electrostatic precipitator 2. A single blowing port 22 corresponds to blowing one electrode porcelain bottle 21. Since there is more than one electrode porcelain bottle 21 in the electrostatic precipitator 2, multiple blowing ports 22 can meet the use requirements of blowing multiple electrode porcelain bottles 21 at the same time.

[0026] The air supply duct 5 is connected with a thermometer 8 for detecting the air supply temperature after being heated by the hot water heater 1. In actual production applications, it is found that hot air at 60-80°C has the best effect on the purging and drying of organic acid mist. The thermometer 8 can detect the hot air temperature. When the purging temperature is too low for a long time, the hot water heater 1 can heat the hot water in time. The blowing duct 6 is connected with a pressure gauge 9 for detecting the blowing pressure output by the fan 4. An air regulating valve 10 is provided on the output end of the fan 4. The air regulating valve 10 can be adjusted in time according to the blowing pressure detected by the pressure gauge 9 to keep the purging force moderate and improve the purging effect on the electrode porcelain bottle 21.

[0027] The blowing port 22 is configured as a tapered port that is narrow at the top and wide at the bottom. In actual use, the tapered blowing port 22 that is narrow at the top and wide at the bottom can form a top-down purge pressure, which can purge the organic acid mist while also being able to purge the particulate matter attached to the electrode porcelain bottle 21 with a certain pressure, further improving the purge effect on the electrode porcelain bottle 21.

[0028] In summary, the utility model can collect and blow the hot air originally discharged directly into the atmosphere for reuse by installing an air pump 7, an air supply pipe 5, an air blowing pipe 6, and a fan 4 that are used in conjunction with a hot water heater, and the fan 4 provides power to send the hot air to the electrostatic demister 2 to blow the dripping acid mist from the electrode porcelain bottle 21, thereby protecting the electrode porcelain bottle 21 and extending the service life of the electrostatic demister 2; this device can save the use of an air preheater and steam, saving application costs. In actual use, taking a one-ton sulfonation device as an example, 100kg of steam can be saved per hour, greatly reducing the cost of tail gas treatment. Therefore, the utility model effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0029] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A waste heat recovery and reuse device for an exhaust gas treatment system, characterized in that: include: A hot water heater, wherein the hot water heater has a hot water chamber for isolating water and providing a high-temperature sulfonation reaction environment; An electrostatic demister, wherein an electrode porcelain bottle is provided in the electrostatic demister for purifying the acid mist tail gas after the high-temperature sulfonation reaction; A collecting tank, which is used to collect the black sulfonic acid at the bottom of the electrostatic precipitator; It also includes a fan, wherein the input end of the fan is connected to an air supply duct, and the output end of the fan is connected to an air blowing duct; The hot water heater is provided with a first interface and a second interface which are connected to the hot water chamber, the first interface is connected to an air pump for supplying air to the hot water chamber; the second interface is connected to an air supply duct for supplying hot air to the fan; The electrostatic demister is provided with an air blowing port corresponding to blowing toward the electrode porcelain bottle, and the air blowing port is connected to the air blowing pipeline.

2. The waste heat recovery and reuse device for the tail gas treatment system according to claim 1, characterized in that: The air supply duct is connected with a thermometer for detecting the temperature of the air after being heated by the hot water heater.

3. The waste heat recovery and reuse device for the tail gas treatment system according to claim 1, characterized in that: The air blowing pipeline is connected with a pressure gauge for detecting the air blowing pressure output by the fan.

4. The waste heat recovery and reuse device for the tail gas treatment system according to claim 3 is characterized in that: An air regulating valve is arranged on the output end of the fan.

5. The waste heat recovery and reuse device for the tail gas treatment system according to claim 1, characterized in that: The air blowing port is configured as a tapered port that is narrow at the top and wide at the bottom.

6. The waste heat recovery and reuse device for the tail gas treatment system according to claim 5, characterized in that: The number of the blowing ports is the same as the number of electrode porcelain bottles in the electrostatic precipitator, and a single blowing port corresponds to blowing one electrode porcelain bottle.

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