Industrial dust removal ventilation pipeline anti-condensation system suitable for dry area

Abstract

The utility model discloses an industrial dust removal ventilation pipeline anti-condensation system suitable for a dry area, and belongs to the field of industrial ventilation pipeline anti-condensation. The system comprises a fresh air heating device, a temperature control system and a pipeline system, the pipeline system comprises a main pipe, branch pipes and a pipeline tee joint, the branch pipes are connected to the main pipe through the pipeline tee joint, and an air temperature sensor and a pipe wall temperature sensor are arranged on the main pipe at the joint of the branch pipes and the main pipe; a fresh air heating device is arranged at one end of the main pipe, and the control cabinet controls on-off and power adjustment of the fin type electric heater. The fresh air heating amount is controlled through the temperature control system, the dry fresh air is heated, and the heat loss of air in the pipe is reduced through the pipeline heat preservation layer. According to the system, outdoor fresh air in a dry area is effectively utilized and mixed with industrial hot and wet to-be-dedusted gas, the dew point of the to-be-dedusted gas is effectively reduced, and the problem that a dedusting ventilation pipeline is dewed and blocked is solved.

Description

Technical Field

[0001] The utility model belongs to the field of anti-condensation of industrial ventilation ducts and proposes an anti-condensation system for industrial dust removal ventilation ducts suitable for dry areas. Background Art

[0002] Condensation refers to the phenomenon that when the water vapor in the air reaches saturation, if the ambient temperature is lower than the dew point temperature of the air at this time, the supersaturated water vapor in the air begins to condense and precipitate. The main reason for condensation inside the dust removal ventilation duct is the temperature difference between the inside and outside of the duct. When the hot and humid gas to be dusted encounters the cold duct wall, the gas temperature decreases and the relative humidity increases. When the gas is close to saturation, the water vapor in the gas will precipitate on the inner surface of the duct, and the dust in the air will also adhere to the duct wall, which will cause duct blockage in the long run.

[0003] Pipeline blockage not only increases fan energy consumption, but also reduces the efficiency of the dust removal system, causing the exhaust gas to fail to meet the standard and causing the factory to stop production. The existing treatment method is to frequently clean the pipeline, which is not only ineffective, but also time-consuming and labor-intensive, greatly increasing the operation and maintenance costs. Therefore, for the factory dust removal ventilation system in dry areas, an industrial dust removal ventilation duct anti-condensation system suitable for dry areas is proposed. Utility Model Content

[0004] The object of the present invention is to provide an anti-condensation system for industrial dust removal ventilation ducts suitable for dry areas, so as to solve the problem of condensation blockage of dust removal ventilation ducts.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-condensation system for industrial dust removal ventilation ducts suitable for dry areas, the system comprising a fresh air heating device, a temperature control system and a piping system;

[0006] The pipeline system includes a main pipe, a branch pipe and a pipe tee, the branch pipe is connected to the main pipe through the pipe tee, and an air temperature sensor and a pipe wall temperature sensor are arranged on the main pipe at the junction of the branch pipe and the main pipe;

[0007] A fresh air heating device is provided at one end of the dry pipe, the fresh air heating device comprises a fresh air inlet, a fin-type electric heater and an axial flow fan which are arranged in sequence, and a fresh air temperature sensor is provided between the fin-type electric heater and the axial flow fan;

[0008] The temperature control system comprises a control cabinet, which is electrically connected to the fresh air temperature sensor, the air temperature sensor and the pipe wall temperature sensor; the control cabinet controls the switch and power of the fin-type electric heater.

[0009] A heat-insulating layer is arranged on the outer sides of the main pipe and the branch pipe.

[0010] The pipeline system is provided with multiple sections of main pipes and multiple sections of branch pipes.

[0011] Compared with the prior art, the present invention has the following beneficial effects: the system includes a fresh air heating device, a temperature control system and a piping system; the piping system includes a main pipe, a branch pipe and a pipe tee, the branch pipe is connected to the main pipe through the pipe tee, and an air temperature sensor and a pipe wall temperature sensor are arranged on the main pipe at the junction of the branch pipe and the main pipe; a fresh air heating device is arranged at one end of the main pipe, and a control cabinet controls the switch and power adjustment of the fin-type electric heater.

[0012] On the one hand, the system mixes the free dry fresh air from the outside with the hot and humid gas to be dusted, reducing the moisture content of the mixed gas, that is, reducing the dew point temperature of the mixed gas. On the other hand, the system detects the temperature of important nodes through multi-point temperature sensors, and preheats the fresh air through the fresh air heating device to increase the temperature of the mixed gas, thereby increasing the temperature of the pipe wall. At the same time, the pipe insulation layer is increased to reduce heat loss, so that the pipe wall temperature is maintained at a high level, which can effectively prevent condensation and blockage in the pipe and reduce the high operation and maintenance costs caused by frequent dust cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall system structure.

[0014] Figure 2 This is a schematic diagram of the structure of the fresh air heating device.

[0015] Figure 3 This is a perspective view of the fresh air heating device structure.

[0016] Figure 4 Schematic diagram of pipeline insulation structure.

[0017] Figure 5 Schematic diagram of the pipeline structure.

[0018] Figure 6 Air handling process diagram.

[0019] Figure 7 The figure is a flow chart of the air handling strategy.

[0020] In the figure: 1. fresh air heating device, 11. axial flow fan, 12. finned electric heater, 13. fresh air outlet, 2. temperature control system, 21. control cabinet, 221. fresh air temperature sensor, 222. air temperature sensor, 223. wall temperature sensor, 3. piping system, 311. main pipe, 312 branch pipe, 313. pipe tee, 32. pipe insulation layer, 3111. first main pipe section, 3112. second main pipe section. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings and technical solutions.

[0022] like Figure 1 As shown, the utility model is an anti-condensation system for industrial dust removal ventilation ducts, and the system consists of a fresh air heating device 1, a temperature control system 2, and a pipeline system 3.

[0023] In this embodiment, if Figure 2 As shown, the fresh air heating device 1 includes an axial flow fan 11, a fin-type electric heater 12 and a fresh air outlet 13; the fin-type electric heater 12 has a square opening and is installed at the outdoor fresh air outlet 13; the axial flow fan 11 is installed behind the fin-type electric heater 12 to form the fresh air heating device 1; the axial flow fan 11 serves as a power source to introduce outdoor air into the room; the fin-type electric heater 12 heats the introduced outdoor air to a certain temperature, and the heating amount can be freely adjusted according to the gas temperature.

[0024] The fresh air heating device 1 includes an axial flow fan 11, a fin-type electric heater 12 and a fresh air inlet 13; the axial flow fan 11 has a constant air volume and introduces outdoor fresh air into the room; outdoor dry air enters from the fresh air inlet 13, passes through the fin-type electric heater 12, and the fresh air temperature is detected by the fresh air temperature sensor 221. When the fresh air temperature is lower than a preset value, the fin-type electric heater 12 is turned on to heat the fresh air; the electric heating power of the fin-type electric heater 12 gradually increases, and when the fresh air temperature reaches the preset temperature, the electric heating power of the fin-type electric heater 12 remains unchanged and stable.

[0025] Furthermore, the determination of the fresh air volume is based on a comprehensive calculation of the local extreme low temperature, the humidity content of the hot and humid dust-containing gas to be treated, and the humidity content of the outdoor air. The fresh air preset temperature is determined based on the air volume and temperature of the fresh air and the dust-removed gas, so that the temperature of the mixed gas is higher than its dew point temperature by a certain safety margin to ensure that there is no condensation in the pipe.

[0026] In this embodiment, if Figure 3 , Figure 4As shown, the temperature control system 2 includes a fresh air temperature sensor 221, an air temperature sensor 222, a pipe wall temperature sensor 223 and a control cabinet 21; the control cabinet 21 is connected to multiple point temperature sensors and controls the heating amount of the finned electric heater 12; the fresh air temperature sensor 221 is installed in the fresh air heating device 1 at the fresh air inlet, between the axial flow fan 11 and the finned electric heater 12; the air temperature sensor 222 at the junction of the branch and trunk pipes is installed in the pipe after the junction of each branch and trunk pipe, and is used to detect the air temperature of each mixing point; the pipe wall temperature sensor 223 at the junction of the branch and trunk pipes is installed on the pipe wall after the junction of each branch and trunk pipe, and is used to detect the pipe wall temperature at each mixing point; the control cabinet 21 is wiredly connected to all point temperature sensors, receives all point temperature information, and adjusts the heating amount of the finned electric heater 12 through a pre-algorithm setting, and then adjusts the fresh air introduction temperature, so that the introduced fresh air temperature is not lower than the design value, and controls the pipe wall temperature to be greater than the dew point temperature of the mixed gas in the pipe to prevent condensation in the pipe.

[0027] The fresh air temperature sensor 221 is installed in the fresh air heating device 1, specifically between the axial flow fan 11 and the finned electric heater 12, and is used to detect the temperature of the fresh air after heating. When it is detected that the temperature after heating is lower than the preset temperature, the heating amount of the finned electric heater 12 will be adjusted through the control cabinet 21 to increase the temperature of the fresh air after heating. The air temperature sensor 222 and the pipe wall temperature sensor 223 are respectively installed in the pipe and on the pipe wall at the same point. When it is detected that the pipe wall temperature is lower than the preset safety temperature, the heating amount of the finned electric heater 12 is adjusted through the control cabinet 21 until the pipe wall temperature reaches above the safety threshold. The pipe wall safety temperature is determined by the dew point temperature of the mixed gas, and the safety temperature is higher than the dew point temperature under the most unfavorable conditions.

[0028] In this embodiment, if Figure 5 As shown, the pipeline system 3 includes a dust removal ventilation duct and a pipeline insulation layer 32; the dust removal ventilation duct consists of a main pipe 311, each branch pipe 312 and a pipeline tee 313, and the main pipe 311 and each branch pipe 312 are connected by the pipeline tee 313; the pipeline insulation layer 32 is wrapped around the outer wall of the duct, and the material and thickness are determined by the actual design; the starting end of the main pipe 311 is the fresh air outlet 13, the middle of the main pipe 311 is connected and merged with each branch pipe 312, and the end is connected to the dust collector; one end of each branch pipe 312 is connected to each dust removal point to introduce the gas to be dusted, and the other end is merged and connected with the main pipe 311; the parameters of the pipeline insulation layer 32 are set according to the specific environment to reduce the heat loss in the pipe, increase the pipe wall temperature, and prevent condensation in the pipe.

[0029] The pipeline system 3 includes a dust removal ventilation main pipe 311, a branch pipe 312, a pipeline tee 313 and a pipeline insulation layer 32; during the pipeline transportation process, the gas will continuously dissipate heat to the outside to reduce the temperature of the pipe wall. The pipeline insulation layer 32 can effectively reduce the heat dissipation of the pipeline, so that the pipe wall is affected by the hot and humid gas to be treated in the pipe to maintain a high temperature, avoiding condensation problems in the pipe. The thickness and material of the insulation layer are set according to the extremely low temperature of the local environment and the temperature of the hot and humid dust-containing gas to be treated in the pipe. The greater the temperature difference between the inside and outside of the pipe, the higher the insulation effect requirement of the insulation layer, so that the heat dissipation of the pipeline is maintained within the allowable range.

[0030] In this embodiment, if Figure 6 , Figure 7 As shown, outdoor air A is introduced into the pipeline system 3 through the fresh air heating device 1, and after the temperature is detected by the fresh air temperature sensor 221, the information is transmitted to the control cabinet 21 to determine whether to heat the fresh air; air A becomes air B after being processed by the fresh air heating device 1, and air B is mixed with the dust-removed gas C from the branch pipe 312 at the pipe tee 313 to become air D; the air temperature sensor 222 behind the pipe tee 313 detects the temperature of the mixed air D, and the pipe wall temperature sensor 223 behind the pipe tee 313 detects the pipe wall temperature of the second main pipe section 3112, and transmits the information to the control cabinet 21; when the temperature is lower than the preset value, the fresh air heating device 1 is controlled to increase the heating amount. The same is true for the subsequent pipe sections, and the above steps are repeated to ensure that no pipe condensation occurs in all pipe sections.

[0031] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An anti-condensation system for industrial dust removal ventilation ducts suitable for dry areas, characterized in that: The system comprises a fresh air heating device (1), a temperature control system (2) and a pipeline system (3); The pipeline system (3) comprises a main pipe (311), a branch pipe (312) and a pipe tee (313); the branch pipe (312) is connected to the main pipe (311) via the pipe tee (313); an air temperature sensor (222) and a pipe wall temperature sensor (223) are provided on the main pipe (311) at the junction of the branch pipe and the main pipe; A fresh air heating device (1) is provided at one end of the dry pipe (311), the fresh air heating device (1) comprising a fresh air inlet (13), a fin-type electric heater (12) and an axial flow fan (11) which are arranged in sequence, and a fresh air temperature sensor (221) is provided between the fin-type electric heater (12) and the axial flow fan (11); The temperature control system (2) comprises a control cabinet (21), and the control cabinet (21) is electrically connected to a fresh air temperature sensor (221), an air temperature sensor (222), and a pipe wall temperature sensor (223); the control cabinet (21) controls the switch and power of the fin-type electric heater (12).

2. According to claim 1, an anti-condensation system for industrial dust removal ventilation ducts suitable for dry areas is characterized by: A thermal insulation layer (32) is provided on the outer sides of the main pipe (311) and the branch pipe (312).

3. The anti-condensation system for industrial dust removal ventilation ducts suitable for dry areas according to claim 1, characterized in that: The pipeline system (3) is provided with multiple sections of main pipes and multiple sections of branch pipes.

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