A 100% sulfuric acid production plant

Abstract

The application discloses a 100% sulfuric acid production equipment, comprising a desorption tower, a blower, a heat exchanger, an acid circulating pump and a spraying device, the desorption tower is internally provided with a filler, the heat exchanger is arranged at the bottom of the desorption tower, the heat exchanger is further provided with a collecting device below the filler, the side of the desorption tower is provided with a sulfuric acid outlet communicated with the collecting device, the bottom of the desorption tower is provided with a mixer, the acid circulating pump is connected with the mixer and the spraying device through liquid conveying pipelines, the spraying device is located above the filler, the side of the desorption tower is provided with a nicotinic acid inlet and a pure water inlet, and the blower is communicated with the heat exchanger. Wherein, a large amount of heat is generated by mixing nicotinic acid and pure water to heat dry air, high-temperature air is generated to more efficiently strip dissolved sulfur dioxide, and the related cost of dry air is saved. In addition, compared with a production mode using low-concentration acid and sulfur trioxide, the quality of sulfuric acid can be improved. In addition, continuous production can be realized to improve production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 100% sulfuric acid production, in particular to a 100% sulfuric acid production equipment. BACKGROUND

[0002] With the increasing demand for high-quality sulfuric acid in the chemical industry, the production cost is high, in addition, the current 100% acid production method uses low concentration acid and sulfur trioxide production method, which causes serious corrosion of the equipment, high equipment cost, high iron ion content in the produced 100% acid, which affects the quality of the downstream products of 100% acid.

[0003] Therefore, how to provide a sulfuric acid production equipment with low production cost and improved quality is a technical problem that needs to be solved by those skilled in the art at present. SUMMARY

[0004] Therefore, the purpose of the present application is to provide a 100% sulfuric acid production equipment which can effectively reduce the production cost and improve the production efficiency.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A 100% sulfuric acid production equipment, comprising: a desorption tower, a blower, a heat exchanger, an acid circulating pump and a spraying device, the desorption tower is provided with a filler, the heat exchanger is arranged at the bottom of the desorption tower, the heat exchanger is further provided with a collecting device located below the filler, the side of the desorption tower is provided with a sulfuric acid outlet communicated with the collecting device, the bottom of the desorption tower is provided with a mixer, the acid circulating pump is connected with the mixer and the spraying device through liquid conveying pipelines respectively, the spraying device is located above the filler, the side of the desorption tower is provided with a nicotinic acid inlet and a pure water inlet, the nicotinic acid inlet and the pure water inlet are communicated with the mixer, the blower is communicated with the heat exchanger, the blower is used for compressing and conveying the heat-absorbed air to the filler, and the air is discharged from the air outlet at the top of the desorption tower after passing through the filler.

[0007] Preferably, the heat exchanger pipe is provided with a turbulence device for mixing nicotinic acid and pure water.

[0008] Preferably, the nicotinic acid inlet and the pure water inlet are located above the heat exchanger.

[0009] Preferably, the heat exchanger is connected with the side wall of the desorption tower below the filler through a gas conveying pipeline.

[0010] Preferably, the spraying device comprises a plurality of spray heads arranged in a circular array or a rectangular array.

[0011] Preferably, the 100% sulfuric acid production device further comprises an acid concentration instrument for detecting the concentration of 100% sulfuric acid in the mixer.

[0012] Compared with the prior art, the above technical solution has the following advantages:

[0013] The 100% sulfuric acid production device provided by the application can continuously introduce the finished product 104.5% or higher concentration nicotinic acid into the mixer through the nicotinic acid inlet, and continuously and slowly introduce pure water into the mixer through the pure water inlet in proportion to mix 100% sulfuric acid. The acid circulating pump sprays the 100% sulfuric acid downward through the spraying device, and the air compressor compresses the air into the heat exchanger, which is sent upward after heat absorption, so as to fully contact and strip the sulfur dioxide in the 100% sulfuric acid in the opposite direction, and then continuously collect the finished product sulfuric acid through the collecting device. In addition, the heat generated by the mixing of nicotinic acid and pure water is used to heat and dry the air, and high-temperature air is generated to more efficiently strip the dissolved sulfur dioxide, thereby saving the cost of drying air. In addition, compared with the production method using low-concentration acid and sulfur trioxide, the quality of sulfuric acid can be improved. In addition, continuous production can be realized to improve production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only a part of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Figure 1 The structure diagram of the 100% sulfuric acid production device provided by the specific embodiment of the present application.

[0016] The reference signs are as follows:

[0017] 1 is a blower, 2 is an air inlet, 3 is a nicotinic acid inlet, 4 is a pure water inlet, 5 is a sulfuric acid outlet, 6 is a desorption tower, 7 is a spraying device, 8 is an air outlet, 9 is a filler, 10 is a collecting device, 11 is a gas conveying pipeline, 12 is a liquid conveying pipeline, 13 is an acid circulating pump, 14 is a mixer, and 15 is a heat exchanger. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0019] Reference is made to Figure 1 , Figure 1 A structure schematic diagram of a 100% sulfuric acid production equipment provided by a specific embodiment of the present application.

[0020] The 100% sulfuric acid production equipment provided by the embodiment of the present application comprises a desorption tower 6, a blower 1, a heat exchanger 15, an acid circulating pump 13 and a spraying device 7, the desorption tower 6 is internally provided with a filler 9, the heat exchanger 15 is arranged at the bottom of the desorption tower 6, the heat exchanger 15 is further internally provided with a collecting device 10 located below the filler 9, the side of the desorption tower 6 is provided with a sulfuric acid outlet 5 in communication with the collecting device 10, the bottom of the desorption tower 6 is provided with a mixer 14, the acid circulating pump 13 is connected with the mixer 14 and the spraying device 7 through liquid conveying pipes 12 respectively, the spraying device 7 is located above the filler 9, and the spraying device 7 can uniformly spray the 100% sulfuric acid in the mixer 14 into the filler 9. The top of the desorption tower 6 is provided with an air outlet 8, the air outlet 8, the spraying device 7, the filler 9, the collecting device 10, the heat exchanger 15 and the mixer 14 are sequentially arranged from top to bottom. The side of the desorption tower 6 is provided with a nicotinic acid inlet 3 and a pure water inlet 4, the nicotinic acid inlet 3 and the pure water inlet 4 are in communication with the mixer 14, the blower 1 is in communication with the heat exchanger 15, the blower 1 conveys air into the heat exchanger through an air inlet 2, then the air after heat absorption is compressed and conveyed to the filler 9, and the air after passing through the filler 9 is discharged from the air outlet 8 at the top of the desorption tower 6. In work, the finished product 104.5% or higher concentration nicotinic acid is continuously introduced into the mixer 14 through the nicotinic acid inlet 3, and the pure water is continuously and slowly introduced into the mixer 14 through the pure water inlet 4 in proportion to mix into 100% sulfuric acid, the acid circulating pump 13 sprays the 100% sulfuric acid downward through the spraying device 7, the blower 1 compresses air and inputs into the heat exchanger 15, the dry air after heat exchange in the shell side and the tube side of the heat exchanger 15 is conveyed upward to fully contact and strip the sulfur dioxide in the 100% sulfuric acid in reverse, then the finished product sulfuric acid is continuously collected through the collecting device 10, and the dry air is heated after fully utilizing the heat generated by mixing the nicotinic acid and the pure water to generate high-temperature air, so that the sulfur dioxide is stripped more efficiently, the related investment of the dry air is saved, and the problems of high cost and low production capacity caused by the current batch production of sulfuric acid are solved.

[0021] In some embodiments, the heat exchanger 15 is internally provided with a turbulence device for mixing the nicotinic acid and the pure water, the nicotinic acid and the pure water can be fully mixed through the turbulence device, and the turbulence device is preferably a spiral ring turbulence device. Figure 1As shown, the nicotinic acid inlet 3 and the pure water inlet 4 are located on the side wall of the left side of the desorption tower 6, and the height position is above the heat exchanger 15. The heat exchanger 15 is connected with the side wall of the desorption tower 6 above the filler 9 through the gas conveying pipe 11, as shown in the figure. Figure 1 As shown, the gas conveying pipe 11 is arranged on the side wall of the right side of the desorption tower 6, one end of the gas conveying pipe 11 is communicated with the heat exchanger 15, and the other end is connected with the side wall of the desorption tower 6 above the heat exchanger 15.

[0022] In some embodiments, the spraying device 7 includes a plurality of spray heads arranged in a circular array or a rectangular array to improve the uniformity of spraying.

[0023] In some embodiments, the sulfuric acid production device further includes an acid concentration instrument for detecting the 100% sulfuric acid concentration in the mixer 14. The 100% sulfuric acid concentration can be detected in real time by the acid concentration instrument to ensure that the 100% sulfuric acid concentration is the required concentration value, thereby preventing abnormal working conditions.

[0024] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0025] The above describes in detail the 100% sulfuric acid production device provided by the present application. The principles and implementation modes of the present application are described by applying specific examples. The above embodiment is only used to help understand the method of the present application and its core idea. It should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways. These improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A 100% sulfuric acid production equipment, characterized in that, include: The desorption tower comprises a blower, a heat exchanger, an acid circulation pump, and a spray device. The desorption tower is filled with packing material. The heat exchanger is located at the bottom of the desorption tower. A collection device is also located below the packing material within the desorption tower. A sulfuric acid outlet connected to the collection device is located on the side of the desorption tower. A mixer is located at the bottom of the desorption tower. The acid circulation pump is connected to both the mixer and the spray device via delivery pipelines. The spray device is located above the packing material. A nicotinic acid inlet and a pure water inlet are located on the side of the desorption tower. The inlet, the nicotinic acid inlet and the pure water inlet are connected to the mixer, the blower is connected to the heat exchanger, the blower is used to compress and transport the heat-absorbing air to the packing, and after passing through the packing, it is discharged from the air outlet at the top of the desorption tower. The heat exchanger tube side is provided with a turbulence device for mixing nicotinic acid and pure water. The heat exchanger is connected to the side wall of the desorption tower located below the packing through a gas transmission pipe. It also includes an acid concentration meter for detecting the 100% sulfuric acid concentration in the mixer.

2. The 100% sulfuric acid production equipment according to claim 1, characterized in that, The nicotinic acid inlet and the pure water inlet are located above the heat exchanger.

3. The 100% sulfuric acid production equipment according to claim 1, characterized in that, The spraying device includes multiple nozzles arranged in a circular or rectangular array.

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