A multi-stage voltage-stabilizing and flow-stabilizing acid distributor

Abstract

The invention discloses a multi-stage pressure-stabilizing and flow-stabilizing acid distributor, including an acid main pipe and an acid distribution pipe, the acid main pipe is connected to an acid distribution pipe with staggered distribution, an acid distribution tank is provided below the acid distribution pipe, an acid distribution branch pipe is provided on the acid distribution pipe, a plurality of buffers corresponding to the acid distribution branch pipes for acid overflow are provided in the acid distribution tank, a gap is provided between the buffer and the acid distribution tank, the end of the acid distribution branch pipe is closed and a pressure-stabilizing hole is provided near the end, the pressure-stabilizing hole connects the acid distribution branch pipe and the buffer; a plurality of baffles are provided in the acid distribution tank, the baffles are arranged alternately left and right with the buffer as an interval, and there is an opening between the baffle and the acid distribution tank; multiple rows of acid drop pipes are provided on both sides of the acid distribution tank, and each acid drop pipe adopts a lateral overflow structure of a split bidirectional overflow tank and an upper and lower main and auxiliary overflow tanks. The invention has the function of multi-stage pressure-stabilizing and flow-stabilizing, ensures that the liquid level in the acid distribution tank is as calm as a mirror, ensures that the sulfuric acid in the acid drop pipe flows evenly and the acid drop point is evenly distributed, and further improves the acid distribution effect and absorption rate.

Description

Technical field:

[0001] The invention relates to sulfuric acid production equipment, in particular to a multi-stage voltage-stabilizing and flow-stabilizing acid distributor, which is used in a drying tower and an absorption tower of a production system and is applied to pyrite acid production, flue gas acid production, sulfuric acid production and low-temperature waste heat recovery. Background technology:

[0002] In the system equipment for manufacturing sulfuric acid, the acid separator is an important component of the drying tower and the absorption tower. Specifically, the acid separator evenly divides the concentrated sulfuric acid fluid entering the drying tower and the absorption tower, so that the concentrated sulfuric acid flowing evenly downward is in uniform contact with the process gas flowing upward from the bottom of the tower in the packing layer. The concentrated sulfuric acid dries and absorbs the sulfur trioxide in the process gas to form a higher concentration of sulfuric acid. The absorption rate of the gas by the acid separator directly affects the normal operation of the entire system. A low absorption rate will lead to excessive acid mist in the tower, causing excessive corrosion of the equipment, poor quality of the finished acid, and excessive sulfur trioxide discharged into the atmosphere will cause serious air pollution. Therefore, the role of the acid separator is very important.

[0003] Chinese patent number CN201842645U discloses an alloy tube-trough type acid distributor, including an acid inlet pipe, an acid main pipe, an acid distribution pipe, an acid distribution branch pipe, an acid distribution trough and an acid drop pipe, but the acid distributor has the problem of large liquid level fluctuation.

[0004] Chinese patent CN201842644U proposes an alloy tube trough type acid distributor. It mainly solves the problems of poor acid distribution effect, low absorption rate, large maintenance workload and short service life of the existing acid distributor. However, there are still problems such as unreasonable design structure, the arrangement of the acid distribution branch pipes is not very consistent with hydraulics, the symmetrical arrangement of the acid distribution branch pipe ports affects each other and forms eddies, and the flow distribution of the acid distribution port is uneven. There is no buffer in the acid distribution tank, etc.

[0005] In view of the defects caused by the above structural design, designers need to design an acid distributor with the function of stabilizing pressure and flow and uniform flow distribution at the acid distribution port. Summary of the invention:

[0006] In order to make up for the shortcomings of the prior art problems, the purpose of the present invention is to provide a multi-stage voltage-stabilizing and flow-stabilizing acid separator to improve the structure of the acid separator, which has the function of multi-stage voltage-stabilizing and flow-stabilizing, ensures that the liquid level in the acid separation tank is as calm as a mirror, ensures that the sulfuric acid in the acid falling pipe flows evenly and slowly, and the acid falling points are uniform and even, further improving the acid separation effect and absorption rate.

[0007] The technical solution of the present invention is as follows:

[0008] A multi-stage pressure-stabilizing and flow-stabilizing acid distributor comprises an acid main pipe, an acid distribution pipe, an acid distribution branch pipe, and an acid distribution tank. The acid main pipe is connected to the acid distribution pipes with staggered distribution. The acid distribution tanks are provided with acid distribution branch pipes extending into the acid distribution tanks. The invention is characterized in that: the acid distribution tanks are provided with a plurality of buffers corresponding to the acid distribution branch pipes for acid overflow, and there are gaps between the buffers and the corresponding side walls of the acid distribution tanks for the overflowed acid to pass through.

[0009] The end of the acid distribution branch pipe is closed, and a pressure stabilizing hole is provided near the closed end of the acid distribution branch pipe, and the pressure stabilizing hole connects the acid distribution branch pipe and the buffer;

[0010] A plurality of baffles are arranged in the acid separation tank, the baffles are arranged alternately on the left and right with the buffer as the interval, and there is an opening between the baffles and the acid separation tank;

[0011] Multiple rows of acid drop pipes are respectively arranged on both sides of the acid distribution tank, and each acid drop pipe adopts a lateral overflow structure of split bidirectional overflow tanks and upper and lower main and auxiliary overflow tanks.

[0012] The multi-stage pressure-stabilizing and flow-stabilizing acid distributor is characterized in that the acid distribution pipes are symmetrically arranged along the direction of the acid main pipe, and a plurality of acid distribution branch pipes are arranged on the acid distribution pipes, and the number is determined by tower diameter and flow calculation.

[0013] The multi-stage pressure-stabilizing and flow-stabilizing acid distributor is characterized in that when the number of the acid distribution pipes is multiple, the number of corresponding acid distribution tanks is also multiple, and connecting pipes are arranged between the opposite side walls of adjacent acid distribution tanks.

[0014] The multi-stage voltage-stabilizing and flow-stabilizing acid distributor is characterized in that the voltage-stabilizing holes are distributed circumferentially near the closed end, are rectangular holes, and the number and size of the voltage-stabilizing holes are determined by calculation based on the principle of the orifice plate to reduce pressure and stabilize flow without throttling.

[0015] The multi-stage voltage-stabilizing and flow-stabilizing acid distributor is characterized in that the buffer is a square trough box, which is arranged at the bottom of the acid distribution tank and has a height lower than the acid distribution tank, and the acid overflows into the acid distribution tank through the upper part of the buffer.

[0016] The multi-stage voltage-stabilizing and flow-stabilizing acid distributor is characterized in that two rows of acid drop pipes are respectively provided on both sides of the acid distribution tank, and the bidirectional overflow troughs of the acid drop pipes are symmetrically distributed. The overflow trough on each side is composed of an upper main overflow trough and a lower auxiliary overflow trough connected to each other, and the slot width of the main overflow trough is larger than the slot width of the auxiliary overflow trough.

[0017] The multi-stage voltage-stabilizing and flow-stabilizing acid distributor is characterized in that the height of the baffle is flush with the notch of the acid distributor, and the opening of the baffle notch is 15% to 45%.

[0018] The multi-stage voltage-stabilizing and flow-stabilizing acid distributor is characterized in that the acid main pipe, acid distribution pipe, acid distribution branch pipe, acid distribution tank and buffer are made of corrosion-resistant alloy material.

[0019] The advantages of the present invention are:

[0020] 1. The present invention has a multi-stage pressure stabilizing component. On the one hand, the pressure is stabilized by arranging a pressure stabilizing hole on the acid distribution branch pipe. The pressure stabilizing hole is arranged circumferentially near the lower closed end of the acid distribution branch pipe. The number of the acid distribution branch pipes is determined according to the tower diameter and flow calculation to ensure that the acid flowing from the acid distribution pipe can enter the buffer uniformly. On the other hand, the pressure is stabilized by a buffer corresponding to the number of the acid distribution branch pipes, so that the acid falling into the acid distribution branch pipe is buffered, and the acid overflows into the acid distribution tank after buffering;

[0021] 2. The present invention has multi-stage flow stabilizing components. First, the acid distribution branch pipe (with a pressure stabilizing hole) and the buffer have not only the function of voltage stabilization, but also the function of flow stabilization. In addition, the acid distribution branch pipe, the baffle plate, and the acid drop pipe are also arranged. The acid liquid overflowing from the buffer into the acid distribution tank passes through the baffle plate, the buffer and the gap between the corresponding side walls of the acid distribution tank for flow stabilization. The acid drop pipe adopts a lateral overflow structure with a split bidirectional overflow tank and upper and lower main and secondary overflow ports. The acid liquid in the acid drop pipe flows evenly and slowly, and the acid drop points are evenly distributed, which further improves the acid distribution effect and absorption rate.

[0022] 3. The present invention ensures that the entire acid distributor has the function of multi-stage voltage and flow stabilization through the reasonable combination of acid distribution branch pipes (with pressure-stabilizing holes), buffers, baffles, acid drop pipes, etc., ensures that the liquid level in the acid distribution tank is as calm as a mirror, ensures that the sulfuric acid in the acid drop pipe flows evenly and slowly, and the acid drop points are uniform and even, further improving the acid distribution effect and absorption rate. Description of the drawings:

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the acid drop tube of the present invention.

[0025] Figure 3 It is the position distribution diagram of the acid drop pipe of the present invention. Specific implementation method:

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] A multi-stage pressure-stabilizing and flow-stabilizing acid distributor comprises an acid main pipe 1, an acid distribution pipe 2, an acid distribution branch pipe 3, and an acid distribution tank 4. The acid main pipe 1 is connected to the acid distribution pipe 2 which is staggered. The acid distribution tank 4 which is in the same direction as the acid distribution pipe is arranged below the acid distribution pipe 2. The acid distribution pipe 3 is provided with a plurality of acid distribution branch pipes 3 extending into the acid distribution tank. The acid distribution tank 4 is provided with a plurality of buffers 5 which correspond to the acid distribution branch pipes 3 one by one and are provided for acid overflow. The buffers 5 and the side walls corresponding to the acid distribution tank 4 are provided with gaps 6 for the overflowed acid to pass through.

[0028] The end of the acid-distribution branch pipe 3 is closed, and a pressure-stabilizing hole 7 is provided near the closed end of the acid-distribution branch pipe 3, and the pressure-stabilizing hole 7 connects the acid-distribution branch pipe 3 and the buffer 5;

[0029] A plurality of baffles 8 are arranged in the acid distribution tank 4, and the baffles 8 are arranged alternately on the left and right with the buffer as the interval, and there is an opening between the baffles 8 and the acid distribution tank 4;

[0030] Multiple rows of acid drop pipes 9 are respectively arranged on both sides of the acid distribution tank 4. Each acid drop pipe 9 adopts a lateral overflow structure with split bidirectional overflow tanks and upper and lower main and auxiliary overflow tanks.

[0031] The acid distribution pipes 2 are arranged symmetrically along the direction of the acid main pipe. A plurality of acid distribution branch pipes 3 are arranged on the acid distribution pipes 2. The number of the acid distribution branch pipes 3 is determined according to the tower diameter and flow rate calculation to ensure that the acid flows evenly into the acid distribution tank.

[0032] When there are multiple acid distribution pipes 2 , there are also multiple corresponding acid distribution tanks 4 , wherein connecting pipes 10 are arranged between opposite side walls of adjacent acid distribution tanks 4 for communication.

[0033] The pressure-stabilizing holes 7 are distributed circumferentially near the closed end. The pressure-stabilizing holes 7 are rectangular holes. The number and size of the pressure-stabilizing holes 7 are determined by calculation based on the principle of the orifice plate to reduce pressure and stabilize flow without throttling.

[0034] The buffer 5 is a square tank box, which is arranged at the bottom of the acid distribution tank 4 and is lower than the acid distribution tank 4. It effectively absorbs the impact force of the acid flowing out of the pressure-stabilizing hole 7 of the acid distribution branch pipe 3, and the acid overflows to the acid distribution tank 4 through the upper part of the buffer.

[0035] Two rows of acid drop pipes 9 are respectively arranged on both sides of the acid distribution tank. The bidirectional overflow grooves of the acid drop pipes 9 are symmetrically distributed. The overflow groove 11 on each side is composed of an upper main overflow groove 11-1 and a lower auxiliary overflow groove 11-2 connected to each other. The slot width of the main overflow groove 11-1 is larger than the slot width of the auxiliary overflow groove 11-2, which effectively ensures that the acid liquid in the acid drop pipe 9 flows evenly and slowly without impact, ensuring the uniform amount of the lowest acid drop point.

[0036] The height of the baffle plate 8 is flush with the notch of the acid separation tank 4, and the notch opening of the baffle plate 8 is 15% to 45%, which effectively stabilizes the liquid level fluctuation in the acid separation tank.

[0037] The acid main pipe 1, the acid distribution pipe 2, the acid distribution branch pipe 3, the acid distribution tank 4 and the buffer 5 are made of corrosion-resistant alloy material, and 316L can also be used. As a low-carbon series of 316 steel, it has the same characteristics as 316 steel and has excellent resistance to intergranular corrosion.

[0038] The present invention has a multi-stage pressure stabilizing component. On the one hand, the pressure is stabilized by setting a pressure stabilizing hole 7 on the acid distribution branch pipe 3 to ensure that the acid flowing from the acid distribution pipe 2 can evenly enter the buffer 5; on the other hand, the buffer 5 corresponding to the number of the acid distribution branch pipes is used to stabilize the pressure, so that the acid falling into the acid distribution branch pipe 3 is buffered, and the acid overflows into the acid distribution tank 4 after buffering.

[0039] The present invention has a multi-stage flow stabilizing component. First, the acid distribution branch pipe 3 (with a pressure stabilizing hole) and the buffer 5 have a pressure stabilizing function as well as a flow stabilizing function. In addition, the acid distribution branch pipe 3, the baffle 8, and the acid drop pipe 9 are also provided. The acid liquid overflowing from the buffer 5 into the acid distribution tank 4 is stabilized by the gaps between the baffle 8, the buffer 5 and the corresponding side walls of the acid distribution tank 4. The acid drop pipe 9 adopts a lateral overflow structure with a split bidirectional overflow tank and upper and lower main and secondary overflow ports, so that the acid liquid in the acid drop pipe 9 flows evenly and slowly, and the acid drop points are evenly distributed, thereby further improving the acid distribution effect and absorption rate.

[0040] The present invention ensures that the entire acid distributor has the function of multi-stage voltage and flow stabilization through the reasonable combination of the acid distribution branch pipe 3 (with a pressure-stabilizing hole), the buffer 5, the baffle 8, the acid drop pipe 9, etc., ensures that the liquid level in the acid distribution tank 4 is as calm as a mirror, ensures that the sulfuric acid in the acid drop pipe 9 flows evenly and slowly, and the acid drop points are evenly distributed, thereby further improving the acid distribution effect and absorption rate.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage pressure-stabilizing and flow-stabilizing acid distributor, comprising an acid main pipe, an acid distribution pipe, an acid distribution branch pipe, and an acid distribution tank, wherein the acid main pipe is connected to the acid distribution pipes with staggered distribution, an acid distribution tank with a consistent direction is arranged below the acid distribution pipes, and the acid distribution pipes are provided with a plurality of acid distribution branch pipes extending into the acid distribution tank, characterized in that: The acid distribution tank is provided with a plurality of buffers corresponding to the acid distribution branch pipes for acid overflow, and there is a gap between the buffer and the corresponding side wall of the acid distribution tank for the overflowing acid to pass through. The end of the acid distribution branch pipe is closed, and a pressure stabilizing hole is opened near the closed end of the acid distribution branch pipe, and the pressure stabilizing hole connects the acid distribution branch pipe and the buffer; The acid separation tank is provided with a plurality of baffles, which are arranged alternately on the left and right sides with the buffer as an interval, and there is an opening between the baffles and the acid separation tank; Multiple rows of acid drop pipes are respectively arranged on both sides of the acid distribution tank, and each acid drop pipe adopts a lateral overflow structure with split bidirectional overflow tanks, upper and lower main and auxiliary overflow tanks; Two rows of acid drop pipes are respectively arranged on both sides of the acid distribution tank, and the bidirectional overflow grooves of the acid drop pipes are symmetrically distributed. The overflow grooves on each side are composed of a main overflow groove at the upper part and a secondary overflow groove at the lower part, and the slot width of the main overflow groove is greater than the slot width of the secondary overflow groove; The acid main pipe, acid distribution pipe, acid distribution branch pipe, acid distribution tank and buffer are made of corrosion-resistant alloy material.

2. The multi-stage voltage-stabilizing and flow-stabilizing acid distributor according to claim 1, characterized in that: The acid distribution pipes are symmetrically arranged along the direction of the acid main pipe, and a plurality of acid distribution branch pipes are arranged on the acid distribution pipes, the number of which is determined by tower diameter and flow calculation.

3. The multi-stage voltage-stabilizing and flow-stabilizing acid distributor according to claim 1 or 2, characterized in that: When there are multiple acid distribution pipes, there are also multiple corresponding acid distribution tanks, wherein connecting pipes are arranged between opposite side walls of adjacent acid distribution tanks.

4. The multi-stage voltage-stabilizing and flow-stabilizing acid distributor according to claim 1, characterized in that: The pressure stabilizing holes are distributed circumferentially near the closed end, are rectangular holes, and the number and size of the pressure stabilizing holes are determined by calculation based on the principle of the orifice plate to reduce pressure and stabilize flow without throttling.

5. The multi-stage voltage-stabilizing and flow-stabilizing acid distributor according to claim 1, characterized in that: The buffer is a square tank box, which is arranged at the bottom of the acid separation tank and has a height lower than the acid separation tank. The acid solution overflows into the acid separation tank through the upper part of the buffer.

6. The multi-stage voltage-stabilizing and flow-stabilizing acid distributor according to claim 1, characterized in that: The height of the baffle is flush with the notch of the acid separation tank, and the opening of the baffle notch is 15% to 45%.

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