Cooling device of air heater for wet-process sulfuric acid production
By introducing a three-way valve and water inlet pipeline into the air heater, combined with a flow guiding structure, the problem of increased energy consumption of the air heater in different seasons is solved. This achieves the goal of meeting temperature requirements without increasing the fan load, reducing energy consumption and improving heating or cooling effects.
Patent Information
- Application Number
- CN202422978449.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-04
AI Technical Summary
Existing air heaters require adjustments to the fan load when used in different seasons, leading to increased energy consumption and making it difficult to meet the requirements for sulfuric acid tail gas outlet temperature without increasing the fan load.
By introducing a three-way valve, water inlet pipeline, and flow guide structure into the air heater, and combining the use of steam and primary water, it functions as a heating device in winter and a condensing device in summer, reducing the fan load and improving the contact efficiency between air and heating pipes by utilizing the flow guide plate.
This technology enables the wet sulfuric acid production unit to meet the temperature requirements of different seasons without increasing the fan load, thereby reducing energy consumption and improving heating or cooling efficiency.
Smart Images
Figure CN223755657U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to air heater cooling technical field, concretely relates to a kind of wet-process sulfuric acid air heater cooling device. BACKGROUND
[0002] Air heater is a kind of heat equipment, its core function is to heat gas flow, when air heater is used in ventilation duct, fan is usually installed at the port of ventilation duct, so that external air can quickly enter into ventilation duct, and air is heated by air heater. In wet-process sulfuric acid device, air heater is to ensure that the temperature of air heater outlet is about 25 degrees Celsius when the ambient temperature is too low in winter, by adding steam and cold air heat exchange. It not only ensures the required air quantity when cooling sulfuric acid, but also better ensures that the temperature of sulfuric acid tail gas outlet meets the standard.
[0003] The existing air heater is steam and cold air heat exchange, steam is used to heat it in winter, in summer, the temperature of air heater outlet can reach about 45 degrees Celsius, to meet the requirement of sulfuric acid tail gas outlet temperature, the fan load needs to be increased to meet the production operation requirement, which will increase the power consumption. SUMMARY
[0004] The utility model provides a kind of wet-process sulfuric acid air heater cooling device, which can heat air in air heater with once water without increasing fan load of air heater, to better ensure that the temperature of sulfuric acid tail gas outlet meets the standard, in view of the deficiency of prior art.
[0005] To achieve the above technical purpose, the utility model provides the following technical scheme: a kind of wet-process sulfuric acid air heater cooling device, including air heater body, air heater body includes shell, the front end of shell is equipped with fan, the rear side of shell is equipped with air outlet passage, heat exchange pipe is equipped in shell, the two sides of shell are equipped with left pipe box and right pipe box respectively, the upper side of left pipe box is connected with steam inlet pipeline, three-way valve is equipped on steam inlet pipeline, water inlet pipeline is installed on the other inlet of three-way valve, water outlet pipeline is equipped in the lower part of right pipe box, and the outlet end of water outlet pipeline is connected with circulating water pool.
[0006] Further, steam inlet valve and regulating valve are respectively arranged on steam inlet pipeline and located at the two sides of three-way valve, inlet valve is arranged on steam inlet pipeline and located between left pipe box and regulating valve, and water inlet valve is arranged on water inlet pipeline.
[0007] Further, drain trap is arranged on water outlet pipeline, condensate inlet valve and condensate outlet valve are arranged on the two sides of drain trap, and condensate outlet valve is further arranged on water outlet pipeline.
[0008] Further, the heat exchange pipes are staggered with two groups, a plurality of groups of guide plates are arranged between the two groups of heat exchange pipes in the shell, a guide flow part is formed between the two adjacent groups of guide plates, the guide flow part comprises a first guide flow channel and a second guide flow channel communicated with the first guide flow channel, the air enters the first guide flow channel from the front side heat exchange pipe and winds to the back of the front side heat exchange pipe and then enters the second guide flow channel, the air enters the second guide flow channel from the periphery of the rear side heat exchange pipe and winds to the back of the rear side heat exchange pipe and then enters the air outlet channel.
[0009] Further, the second guide flow channel is in an arc structure.
[0010] Compared with the prior art, the beneficial effects of the air heater body are that: by increasing the three-way valve, the water inlet pipeline and cooperating with the steam inlet valve, the water inlet valve and other valve structures on the steam inlet pipeline, the original position of the air heater body is not changed, the air heater body can heat the wet method sulfuric acid device in winter and condense the wet method sulfuric acid device in summer, and the load of the fan does not need to be additionally increased, so that the demand of the wet method sulfuric acid tail gas is met, and the effect of saving energy consumption is achieved; by increasing the guide flow part in the shell, the residence time of the air in the shell is reduced, and the flowing air contacts the back of the heating pipe, so that the heat or cold of the back of the heating pipe is taken away, and the heating or cooling effect is improved. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 is the overall structure schematic view of the utility model;
[0012] Figure 2 is the structure schematic view of the air heater body of the utility model;
[0013] Figure 3 is the cross section structure schematic view of the air heater body of the utility model.
[0014] In the drawing, 1, air heater body; 101, shell; 102, air outlet channel; 103, heat exchange pipe; 104, left pipe box; 105, right pipe box; 106, guide plate; 107, first guide flow channel; 108, second guide flow channel; 2, steam inlet pipeline; 3, three-way valve; 4, water inlet pipeline; 5, water outlet pipeline; 6, circulating water pool; 7, steam inlet valve; 8, regulating valve; 9, inlet valve; 10, water inlet valve; 11, condensate inlet valve; 12, trap; 13, condensate outlet valve; 14, condensate outlet valve. DETAILED DESCRIPTION
[0015] The following is a specific embodiment of the utility model, and the technical scheme of the utility model is further described in combination with the drawings, but the utility model is not limited to these embodiments.
[0016] As Figures 1-3 The utility model provides a kind of wet-process sulfuric acid air heater cooling device, including air heater body 1, air heater body 1 includes shell 101, fan is equipped in the front end of shell 101, the rear side of shell 101 is equipped with air outlet passage 102, flange is equipped on air outlet passage 102, flange is connected with wet-process sulfuric acid device by pipeline, heat exchange pipe 103 is equipped in shell 101, the both sides of shell 101 are equipped with left pipe box 104 and right pipe box 105 respectively, the upper side of left pipe box 104 is connected with steam inlet line 2, three-way valve 3 is equipped on steam inlet line 2, inlet line 4 is installed on the other inlet of three-way valve 3, the lower part of right pipe box 105 is equipped with water outlet line 5, and the outlet end of water outlet line 5 is connected with circulating water pool 6.
[0017] As Figure 1 And 2 As shown in the drawing, by inlet line 4 and three-way valve 3, water is injected into steam inlet line 2 (water is extracted from water source and not used for system circulation, and the temperature is generally in the tens of degrees), and the water enters heat exchange pipe 103 through left pipe box 104, so that the outlet temperature of shell 101 is reduced, and the cooled gas is transported to the wet-process sulfuric acid device along the air outlet passage 102 and the pipeline by the fan, achieving the effect of sulfuric acid condensation. The water after heat exchange in the heat exchange pipe 103 enters the circulating water pool 6 along the water outlet line 5 and can be recycled. The utility model can change the original position of the air heater body 1 through the three-way valve 3 and the inlet line 4, so that the wet-process sulfuric acid device can be heated as a heating device in winter and condensed as a refrigeration device in summer, without the need to increase the load of the fan, thereby meeting the demand of the wet-process sulfuric acid tail gas and achieving the effect of energy saving.
[0018] The steam inlet valve 7 and the adjusting valve 8 are respectively arranged on the steam inlet line 2 and located on the two sides of the three-way valve 3, the inlet valve 9 is arranged on the steam inlet line 2 and located between the left pipe box 104 and the adjusting valve 8, and the water inlet valve 10 is arranged on the inlet line 4.
[0019] As Figure 1 As shown in the drawing, the steam inlet valve 7 is used to control the entry of steam, the water inlet valve 10 is used to control the opening or closing of the inlet line 4, the adjusting valve 8 is used to adjust the flow rate of steam or water, and the inlet valve 9 is used to control the opening or closing of the steam inlet line.
[0020] The water outlet line 5 is provided with a trap 12, and the trap 12 is provided with a condensate inlet valve 11 and a condensate outlet valve 13 on both sides. The water outlet line 5 is also provided with a condensate outlet valve 14.
[0021] As Figure 1As shown, the condensate in the pipe can be continuously discharged to the outside of the pipe through the steam trap 12, thereby achieving the purpose of steam blocking and drainage. The condensate inlet valve 11 and the condensate outlet valve 13 can control the working status of the steam trap and maintain its normal operation. The condensate bypass valve 14 is used to regulate the flow path of the condensate. When the steam trap malfunctions or needs maintenance, it provides a backup drainage channel to ensure the normal operation of the system.
[0022] The heat exchange tubes 103 are arranged in two sets in an alternating manner. Several sets of guide plates 106 are provided between the two sets of heat exchange tubes 103 inside the shell 101. A guide section is formed between two adjacent sets of guide plates 106. The guide section includes a first guide channel 107 and a second guide channel 108 connected to the first guide channel 107. Air enters the first guide channel 107 from the front heat exchange tube 103 and goes around to the back of the front heat exchange tube 103 before entering the second guide channel 108. Air enters the second guide channel 108 and goes around to the back of the rear heat exchange tube 103 before entering the air outlet channel 102.
[0023] like Figure 3 As shown, in existing air heaters, when air passes through the heating tube 103, the flowing air has difficulty quickly carrying away the heat from the back of the heating tube 103, resulting in poor heating effect. In this embodiment, to improve the heating or cooling effect, a guide section is added inside the housing 101 to reduce the residence time of the air inside the housing 101 and to make the flowing air contact the back of the heating tube 103, facilitating the removal of heat or cold from the back of the heating tube 103, thereby improving the heating or cooling effect; the fan blows the air, and the flowing air first enters the first guide channel 10 from the front of the heat exchange tube 103. Within the first guide channel 107, as air enters, it comes into full contact with the outer wall of the front heating tube 103, and then enters the second guide channel 108. In the second guide channel 108, the flowing air comes into full contact with the outer wall of the rear heating tube 103. This allows the air to fully contact the outer wall of the heating tube 103, facilitating the removal of heat or cold from the heating tube 103 and increasing the heating or cooling effect. The first guide channel 107 and the second guide channel 108 can prevent air from passing through the housing 101 too quickly, increasing the residence time of the air in the housing 101 and further improving the heating or cooling effect.
[0024] The second flow channel 108 has an arc-shaped structure.
[0025] like Figure 3 As shown, the arc-shaped second flow channel 108 can reduce the distance between the second flow channel 108 and the back of the rear heat exchange tube 103 when air enters the second flow channel 108, thereby improving the contact effect.
[0026] Principle of use: in summer, when the air heater body 1 is cooled, open the water inlet valve 10, the inlet valve 9 and the trap 12, close the steam inlet valve 7, and send the primary water to the steam inlet pipeline 2 through the water inlet pipeline 4, the primary water enters the left tank 104 along the steam inlet pipeline 2 and then enters the heating pipe 103, and the shell 101 is cooled, the fan is started, the fan blows the air flow, the flowing air first enters the first flow guide channel 107 from the front side of the heat exchange pipe 103, in the process of entering the first flow guide channel 107, the air will fully contact with the outer wall of the front side heating pipe 103, and then enters the second flow guide channel 108, in the second flow guide channel 108, the flowing air will fully contact with the outer wall of the rear side heating pipe 103, and the cold energy on the heating pipe 103 is taken away, gathered in the air outlet channel 102, so that the temperature at the outlet of the air heater body 1 is reduced, and is sent to the wet sulfuric acid device through the pipeline to condense, the primary water in the heating pipe 103 is sent to the right tank 105 after doing work in the shell 101, and is discharged into the water circulation pool 6 through the water outlet pipeline 5, and the water in the water circulation pool 6 can be reused.
[0027] In winter, open the steam inlet valve 7, the inlet valve 9 and the trap 12, close the water inlet valve 10, inject water vapor into the steam inlet pipeline 2, and the water vapor enters the heating pipe 103 to heat the shell 101, and the steps for the wet sulfuric acid device are the same as the cooling steps, which are not repeated here, the heat is sent to the wet sulfuric acid device by the fan to heat, and the sulfuric acid tail gas outlet temperature is ensured to meet the standard.
[0028] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways instead, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.
Claims
1. A wet process sulphuric acid air heater cooling device comprising an air heater body (1), characterised in that: The air heater body (1) comprises a shell (101), the front end of the shell (101) is provided with a fan, the rear side of the shell (101) is provided with an air outlet channel (102), the shell (101) is provided with heat exchange pipes (103) inside, the two sides of the shell (101) are respectively provided with a left pipe box (104) and a right pipe box (105), the upper side of the left pipe box (104) is connected with a steam inlet pipeline (2), the steam inlet pipeline (2) is provided with a three-way valve (3), the other inlet of the three-way valve (3) is installed with a water inlet pipeline (4), the lower part of the right pipe box (105) is provided with a water outlet pipeline (5), and the outlet end of the water outlet pipeline (5) is connected with a circulating water pool (6).
2. A wet process sulphuric acid air heater cooling device according to claim 1, characterised in that: The steam inlet pipeline (2) is provided with a steam inlet valve (7) and an adjusting valve (8) on the two sides of the three-way valve (3), and the steam inlet pipeline (2) is provided with an inlet valve (9) between the left pipe box (104) and the adjusting valve (8).
3. A wet process sulphuric acid air heater cooling device according to claim 1, characterised in that: The water outlet pipeline (5) is provided with a steam trap (12), and the two sides of the steam trap (12) are provided with a condensate inlet valve (11) and a condensate outlet valve (13), and the water outlet pipeline (5) is further provided with a condensate outlet valve (14).
4. A wet process sulphuric acid air heater cooling device according to claim 1, characterised in that: The heat exchange pipes (103) are staggered and provided with two groups, a plurality of groups of guide plates (106) are arranged between the two groups of heat exchange pipes (103) in the shell (101), a guide part is formed between the two adjacent groups of guide plates (106), the guide part comprises a first guide channel (107) and a second guide channel (108) communicated with the first guide channel (107), air enters the first guide channel (107) from the front heat exchange pipe (103) and is wound to the back of the front heat exchange pipe (103) and then enters the second guide channel (108), and the air enters the second guide channel (108) from the outer periphery of the rear heat exchange pipe (103) and is wound to the back of the rear heat exchange pipe (103) and then enters the air outlet channel (102).
5. A wet process sulphuric acid air heater cooling device according to claim 4, characterised in that: The second guide channel (108) is in an arc structure.