Cooling deacidification tower

Abstract

The utility model relates to a cooling deacidification tower which comprises a lower tower body and an upper tower body which are both made of glass fiber reinforced plastics and are connected and fixed through flanges; a cofferdam is arranged on the outer side of the upper end of the upper tower body, surrounds the outer side of the upper tower body and is higher than the upper tower body; an annular and sealed overflow groove is formed between the cofferdam and the upper tower body; a dynamic wave spray head is fixedly arranged in the upper tower body and sprays liquid upwards; a liquid storage area is arranged at the bottom of the lower tower body; the overflow groove is communicated with the liquid storage area through an overflow liquid supply pipeline; the manufacturing cost is greatly reduced; the glass fiber reinforced plastic material is corrosion-resistant, the overflow groove is arranged, so that liquid flow overflows downwards along the tower wall to be in contact with high-temperature gas, evaporation cooling is generated, and the glass fiber reinforced plastic material can run for a long time at the temperature without problems.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfuric acid production equipment, in particular to a cooling and acid removal tower. Background Art

[0002] In the process of sulfuric acid production, pyrite materials that meet the standards are generally selected and put into the boiling furnace for roasting. After the gas produced by combustion is treated, the gas containing SO2, SO3, HCL, etc. is transported to the deacidification tower for cooling, absorption and deacidification. The gas entering the deacidification tower is generally at a high temperature, reaching 300-400℃. Because the gas is highly corrosive, the deacidification tower is currently generally made of titanium alloy, which has a high investment cost. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a cooling and acid-removing tower with low manufacturing cost, reasonable structure and stable operation.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a cooling and acid removal tower, comprising a lower tower body and an upper tower body, both of which are made of glass fiber reinforced plastics and are connected and fixed by flanges;

[0005] A cofferdam is arranged on the outer side of the upper end of the upper tower body, which surrounds the outer side of the upper tower body and is higher than the upper tower body; an annular, sealed overflow trough is formed between the cofferdam and the upper tower body; a power wave nozzle is fixedly arranged in the upper tower body, and the power wave nozzle sprays liquid upward;

[0006] An air outlet pipe is provided on the lower tower body, and a liquid storage area is provided at the bottom;

[0007] The overflow tank is connected to the liquid storage area through an overflow liquid supply pipeline.

[0008] In the above-mentioned cooling and acid removal tower, the power wave nozzle is arranged near the lower end of the upper tower body.

[0009] In the above-mentioned cooling and acid removal tower, the dynamic wave nozzle includes a connecting pipe, a rotating body, an atomizing nozzle and a protective sleeve; the protective sleeve is provided with an installation cavity, and the installation cavity passes through the upper and lower end faces of the protective sleeve; the atomizing nozzle is fixed at the upper end of the installation cavity, and the atomizing nozzle is provided with an atomizing channel, and the connecting pipe is fixedly connected to the lower end of the installation cavity; the rotating body is located between the connecting pipe and the atomizing nozzle, and can rotate relative to the protective sleeve; the rotating body is a cylinder, and its upper end face is a plane, and the lower end face is provided with a spherical groove, and the spherical groove is provided with a through hole passing through the upper and lower end faces of the rotating body and a plurality of inclined holes; the inner end of the inclined hole is connected to the through hole.

[0010] In the above-mentioned cooling and acid removal tower, the atomization channel consists of a lower circular hole, a conical hole and an upper circular hole arranged in sequence from bottom to top. The inner diameter of the lower circular hole is larger than the inner diameter of the upper circular hole, and the conical hole connects and connects the lower circular hole and the upper circular hole.

[0011] In the above-mentioned cooling and acid removal tower, the rotating body and the atomizing nozzle are both made of polytetrafluoroethylene.

[0012] In the above-mentioned cooling and acid-removing tower, a water receiving tray is provided at the connection between the lower tower body and the upper tower body, and the water receiving tray has a clip-on sealing portion, which is annular; the clip-on sealing portion is clamped between the upper tower body and the lower tower body; the clip-on sealing portion extends toward the inside of the tower body, and the part of the clip-on sealing portion extending into the tower body is provided with a water retaining platform and a plurality of liquid replenishing holes; the water retaining platform is annular and is located at the inner edge of the clip-on sealing portion; the liquid replenishing hole is arranged near the tower wall, the outer wall of the liquid replenishing hole is flush with the inner wall of the lower tower body, and the inner wall is an inclined surface to guide the liquid to flow toward the outer wall.

[0013] In the above-mentioned cooling and acid removal tower, the water receiving tray is made of glass fiber reinforced plastic.

[0014] In the above-mentioned cooling and acid removal tower, the upper end surface of the upper tower body is serrated.

[0015] Due to the adoption of the above technical solution, the cooling and acid removal tower of the present application has the following advantages:

[0016] Compared with the acid removal tower made of titanium alloy, this acid removal tower is made of fiberglass, which greatly reduces the production cost;

[0017] FRP is corrosion-resistant. In order to avoid the influence of high temperature on the deacidification tower, the deacidification tower is also equipped with an overflow tank. The water overflowing along the tower wall comes into contact with the high-temperature gas and produces evaporation and cooling, which can effectively reduce the problem to about 100-120℃. The FRP material can operate for a long time at this temperature without any problems.

[0018] The overflow liquid supply pipeline matched with the overflow tank circulates the liquid at the bottom of the tower body into the overflow tank, which can not only cool the tower wall, but also continuously absorb the SO2 and SO3 gases in the high-temperature gas, increase the acid content of the liquid, and produce high-concentration acid water with long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0021] Figure 2It is a structural schematic diagram of a power wave nozzle in an embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of a rotating body in an embodiment of the utility model;

[0023] Figure 4 It is a schematic structural diagram of the water receiving tray 8 in the embodiment of the utility model.

[0024] In the figure:

[0025] 1-lower tower body; 2-overflow liquid supply pipeline; 3-cofferdam; 4-gas delivery pipeline; 5-power wave nozzle; 51-connecting pipe; 52-rotating body; 53-atomizing nozzle; 54-atomizing channel; 55-protective sleeve; 56-inclined hole; 57-spherical groove; 58-through hole; 6-air outlet pipe; 7-upper tower body; 8-water receiving tray; 81-snapping sealing part; 82-liquid replenishing hole; 83-inner wall; 84-water retaining platform; 85-gas circulation hole. DETAILED DESCRIPTION

[0026] like Figure 1 As shown, the cooling and acid removal tower includes a lower tower body 1 and an upper tower body 7, both of which are made of glass fiber reinforced plastics and are connected and fixed by flanges. In order to prevent the upper tower body 7 and the lower tower body 1 from contacting with high-temperature gas and carbonizing, a cofferdam 3 is provided on the outer side of the upper end of the upper tower body 7, and the cofferdam 3 surrounds the outer side of the upper tower body 7 and is higher than the upper tower body 7. An annular, sealed overflow trough is formed between the cofferdam 3 and the upper tower body 7; the overflow trough is connected to the liquid storage area at the bottom of the lower tower body 1 through the overflow liquid supply pipeline 2; a pump body is provided on the overflow liquid supply pipeline 2, and when the liquid level in the overflow trough is higher than the end face of the upper tower body 7, the liquid flows downward along the inner wall of the upper tower body 7, forming a liquid film on the inner wall of the upper tower body 7.

[0027] Furthermore, the upper end surface of the upper tower body 7 is serrated, and the evenly distributed concave parts can guide the liquid flow to be evenly distributed on the inner wall of the upper tower body 7 .

[0028] The cofferdam 3 is sealed and fixedly connected to the gas delivery pipeline 4 , and a gas outlet pipe 6 is provided on the lower tower body 1 ; the high-temperature gas flows in from the upper end of the upper tower body 7 and flows out from the gas outlet pipe 6 .

[0029] The upper tower body 7 is also fixedly provided with a power wave nozzle 5, which is arranged near the lower end of the upper tower body 7; the power wave nozzle 5 sprays liquid upward, and the liquid flow direction is opposite to the high-temperature gas flow direction, which can promote the full mixing of the two, fully cool the gas and improve the absorption rate. The power wave nozzle 5 cooperates with the overflow trough to effectively prevent the high-temperature gas from carbonizing the upper tower body 7.

[0030] like Figure 2 and Figure 3As shown, the power wave nozzle 5 includes a connecting pipe 51, a rotating body 52, an atomizing nozzle 53 and a protective sleeve 55. The protective sleeve 55 has a mounting cavity, which runs through the upper and lower end surfaces of the protective sleeve; the atomizing nozzle 53 is fixed at the upper end of the mounting cavity, and the atomizing nozzle 53 has an atomizing channel 54, which is composed of a lower circular hole, a tapered hole and an upper circular hole. The inner diameter of the lower circular hole is larger than the inner diameter of the upper circular hole, and the tapered hole connects and connects the lower circular hole and the upper circular hole. The connecting pipe 51 is fixedly connected to the lower end of the mounting cavity; the rotating body 52 is located between the connecting pipe 51 and the atomizing nozzle 53, and can rotate relative to the protective sleeve 55. In order to avoid wear of the rotating body 52 and the atomizing nozzle 53, both are made of polytetrafluoroethylene. The rotating body 52 is a cylinder, the upper end face of which is a plane, and the lower end face is provided with a spherical groove 57, and the spherical groove 57 is provided with a through hole 58 penetrating the upper and lower end faces of the rotating body 52 and a plurality of inclined holes 56; the inner end of the inclined hole 56 is connected with the through hole 58. When the liquid flows through the rotating body 52 from bottom to top, since the side wall of the inclined hole 56 is not parallel to the flow direction of the liquid, the liquid will impact on the side wall of the inclined hole 56, and then can push the rotating body 52 to rotate, breaking up the liquid flow; finally, it is sprayed out through the atomizing nozzle 53 in atomization.

[0031] In actual application, the inventors found that due to the temperature fluctuation of the high-temperature gas, when the overflow liquid flow rate maintains the set flow rate unchanged, there will be an undesirable situation that the liquid film on the inner wall of the lower tower body 1 is formed. To solve this problem, a water receiving tray 8 is set at the connection between the lower tower body 1 and the upper tower body 7, and the water receiving tray 8 is also made of fiberglass.

[0032] like Figure 4 As shown, the water receiving pan 8 has a clamping seal portion 81, which is annular and has a gas flow hole 85 inside. The clamping seal portion 81 is clamped between the upper tower body 7 and the lower tower body 1; when the upper tower body 7 and the lower tower body 1 are fixedly installed, the water receiving pan 8 is also fixed. Both end surfaces of the clamping seal portion 81 are flat, which can be tightly fitted with the lower end surface of the upper tower body 7 and the upper end surface of the lower tower body 1 to form a seal.

[0033] The clamping seal 81 extends to a certain extent inside the tower body, and can receive part of the liquid sprayed by the power wave nozzle 5 to the area near the tower wall, and drain this part of the liquid to cool the inner wall of the lower tower body 1. The part of the clamping seal 81 extending into the tower body is provided with a water retaining platform 84 and a plurality of liquid replenishing holes 82; the water retaining platform 84 is annular and located at the inner edge of the clamping seal 81; the liquid replenishing hole 82 is located on the outer side of the water retaining platform 84, near the tower wall; the outer wall of the liquid replenishing hole 82 is flush with the inner wall of the lower tower body 1, and the inner wall 83 is an inclined surface, guiding the liquid to flow to the outer wall, providing enough liquid for the inner wall of the lower tower body 1, and forming a liquid film to block the high-temperature gas. The plurality of liquid replenishing holes 82 are evenly distributed in the circumferential direction of the lower tower body 1, which is also conducive to the liquid flowing down from the inner wall of the upper tower body 7 to be evenly distributed again.

[0034] The bottom liquid storage area of ​​the lower tower body 1 is also provided with a concentration detection element and a liquid discharge pipe, wherein the concentration detection element is used to detect the concentration of the solution. When the solution concentration reaches the set requirements, it can be transported to the storage device or the next process equipment through the liquid discharge pipe. This is the prior art and will not be described in detail in this application.

[0035] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A cooling and acid removal tower, characterized in that: It comprises a lower tower body (1) and an upper tower body (7), both of which are made of glass fiber reinforced plastics and are connected and fixed by flanges; A cofferdam (3) is provided on the outer side of the upper end of the upper tower body (7), the cofferdam (3) surrounds the outer side of the upper tower body (7) and is higher than the upper tower body (7); an annular, sealed overflow trough is formed between the cofferdam (3) and the upper tower body (7); a power wave nozzle (5) is fixedly provided in the upper tower body (7), and the power wave nozzle (5) sprays liquid upwards; The lower tower body (1) is provided with an air outlet pipe (6) and a liquid storage area at the bottom; The overflow tank is connected to the liquid storage area through an overflow liquid supply pipe (2).

2. A cooling and acid removal tower as claimed in claim 1, characterized in that: The power wave nozzle (5) is arranged near the lower end of the upper tower body (7).

3. A cooling and acid removal tower as claimed in claim 1, characterized in that: The power wave spray head (5) comprises a connecting pipe (51), a rotating body (52), an atomizing nozzle (53) and a protective sleeve (55); the protective sleeve (55) has a mounting cavity therein, and the mounting cavity penetrates the upper and lower end surfaces of the protective sleeve (55); the atomizing nozzle (53) is fixed at the upper end of the mounting cavity, the atomizing nozzle (53) has an atomizing channel (54), and the connecting pipe (51) is fixedly connected to the lower end of the mounting cavity; the rotating body (52) is located between the connecting pipe (51) and the atomizing nozzle (53), and can rotate relative to the protective sleeve (55); the rotating body (52) is a cylinder, the upper end surface of which is a plane, and the lower end surface is provided with a spherical groove (57), and the spherical groove (57) is provided with a through hole (58) penetrating the upper and lower end surfaces of the rotating body (52) and a plurality of inclined holes (56); the inner end of the inclined hole (56) is connected to the through hole (58).

4. A cooling and acid removal tower as claimed in claim 3, characterized in that: The atomization channel (54) is composed of a lower circular hole, a tapered hole, and an upper circular hole arranged in sequence from bottom to top. The inner diameter of the lower circular hole is larger than the inner diameter of the upper circular hole. The tapered hole connects and communicates the lower circular hole and the upper circular hole.

5. A cooling and acid removal tower as claimed in claim 3, characterized in that: The rotating body (52) and the atomizing nozzle (53) are both made of polytetrafluoroethylene.

6. A cooling and acid removal tower as claimed in claim 1, characterized in that: A water receiving tray (8) is provided at the connection between the lower tower body (1) and the upper tower body (7), and the water receiving tray (8) has a clamping sealing portion (81), and the clamping sealing portion (81) is annular; the clamping sealing portion (81) is clamped between the upper tower body (7) and the lower tower body (1); the clamping sealing portion (81) extends into the tower body, and a water retaining platform (84) and a plurality of liquid replenishing holes (82) are provided in the portion where the clamping sealing portion (81) extends into the tower body; the water retaining platform (84) is annular and is located at the inner edge of the clamping sealing portion (81); the liquid replenishing holes (82) are arranged near the tower wall, and the outer wall of the liquid replenishing hole (82) is flush with the inner wall of the lower tower body (1), and the inner wall (83) is an inclined surface to guide the liquid to flow toward the outer wall.

7. A cooling and acid removal tower as claimed in claim 6, characterized in that: The water receiving tray (8) is made of glass fiber reinforced plastic.

8. A cooling and acid removal tower as claimed in claim 1, characterized in that: The upper end surface of the upper tower body (7) is serrated.

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