Mononitrate reaction ingredient mixing production device and process

Abstract

The invention relates to the technical field of chemical production, and provides a nitre reaction ingredient mixing production device and process, the nitre reaction ingredient mixing production device comprises a nitre-mixed acid mixer, the nitre-mixed acid mixer comprises a mixing tank body, one end of the bottom of the mixing tank body is connected with a nitric acid pump, and the inlet end of the nitric acid pump is connected with a concentrated nitric acid tank; one end of the bottom of the mixing tank is connected with a dinitrate waste acid pump, the inlet end of the dinitrate waste acid pump is connected with a dinitrate waste acid tank, the other end of the bottom of the mixing tank is connected with a discharging pipe, the inner side of the mixing tank is rotationally connected with a spiral stirring shaft, and one end of the inner side of the mixing tank is connected with a cooling coil. A steam guide pipe is fixedly connected to the outlet end of the cooling coil, a mounting box is fixedly connected to the outer side of the mixing tank body, a steam-driven mechanism is arranged on the inner side of the mounting box, and a water supply mechanism is arranged at the top end of the inner side of the mounting box. Cooling water in the cooling coil pipe can absorb heat in the mixing tank body to achieve cooling, and the problem that the product quality is affected due to excessive heat accumulation in the mixing tank body is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of chemical production, and in particular to a nitre reaction batching and mixing production device and process. Background Art

[0002] Dinitrochlorobenzene is an important chemical raw material, which is widely used in medicine, pesticides, dyes, explosives, chemical additives and other fields. With the continuous development of the domestic chemical industry, the market demand for 2,4-dinitrochlorobenzene is also increasing. The main production method of 2,4-dinitrochlorobenzene is the traditional kettle nitration synthesis process, in which concentrated nitric acid and dinitro waste acid need to be mixed for treatment during the nitration reaction, which requires the use of an acid mixer.

[0003] After searching, the Chinese patent publication number CN209584045U disclosed "a reaction device for 2,4-dinitrochlorobenzene, including an acid preparation kettle, a nitric acid metering tank, a sulfuric acid metering tank, a waste acid recovery metering tank, a nitration kettle, a mixed acid metering tank, a separation tank, an extraction kettle, a water washing kettle, an ammonia water metering tank, a suction filtration tank, a mother liquor tank, a washing water tank, and a washing water tank; the nitric acid metering tank, the sulfuric acid metering tank, and the waste acid recovery metering tank are respectively connected to the acid preparation kettle; the sulfuric acid metering tank is also connected to the nitration kettle; the bottom of the acid preparation kettle is connected to the nitration kettle through the mixed acid metering tank; the bottom of the nitration kettle is connected to the material inlet of the separation tank, one branch of the material outlet of the separation tank is connected to the extraction kettle, and the other branch of the material outlet of the separation tank is connected to the water washing kettle; the ammonia water metering tank and the washing water tank are respectively connected to the water washing kettle; the water washing kettle is connected to the suction filtration tank".

[0004] However, in the process of implementing the relevant technology, the above patent has some technical defects: first, the patent uses an acid preparation kettle to carry out mixed acid treatment of concentrated nitric acid and dinitrate waste acid. Since the mixed acid process of concentrated nitric acid and dinitrate waste acid will release a large amount of heat, and the heat transfer efficiency and mass transfer effect of the acid preparation kettle have certain limitations, which will cause regional over-nitration or hot spots to be generated, so that heat accumulates, and it is easy to generate polynitro substances and oxidation and other side reactions, thereby affecting the quality of the final product; second, the concentrated nitric acid and dinitrate waste acid in the acid preparation kettle are mainly mixed by mixed flow, and the mixed flow speed slows down after the mixed acid is fully introduced into the acid preparation kettle, which makes the mixing efficiency of the two acid solutions low. In view of this, the present invention proposes a production device and process for mixing ingredients for a dinitrate reaction. Summary of the invention

[0005] The invention provides a mononitro reaction batching and mixing production device and process, which solves the problem that the internal heat accumulation of the existing acid batching kettle during acid mixing causes the occurrence of side reactions such as polynitro substances and oxidation, thereby affecting product quality.

[0006] The technical scheme of the present invention is as follows: a nitrate reaction batching and mixing production device, comprising a nitrate mixed acid mixer, the nitrate mixed acid mixer comprising a mixing tank body, one end of the bottom of the mixing tank body is connected to a nitric acid pump through a conduit, the inlet end of the nitric acid pump is connected to a concentrated nitric acid tank through a conduit, one end of the bottom of the mixing tank body is connected to a dinitrate waste acid pump through a conduit, the inlet end of the dinitrate waste acid pump is connected to the dinitrate waste acid tank through a conduit, the other end of the bottom of the mixing tank body is fixedly connected to a discharge pipe for exporting the nitrate mixed acid, the inner side of the mixing tank body is rotatably connected to a spiral stirring shaft, one end of the inner side of the mixing tank body is fixedly connected to a cooling coil filled with cooling water, the outlet end of the cooling coil is fixedly connected to a steam conduit, the outer side of the mixing tank body is fixedly connected to an installation box, the inner side of the installation box is provided with a pneumatic mechanism for introducing steam to drive the spiral stirring shaft to rotate by connecting with the steam conduit, and the top of the inner side of the installation box is provided with a water supply mechanism for introducing cooling water into the cooling coil by cooperating with the driving of the pneumatic mechanism.

[0007] Preferably, the pneumatic mechanism includes a sealing cylinder, which is fixedly connected to the inner side of the mounting box, the inner side of the sealing cylinder is rotatably connected to a rotating shaft, one end of the rotating shaft is fixedly connected to the spiral stirring shaft, the other end of the rotating shaft is fixedly connected to a steam turbine, one end of the sealing cylinder is fixedly connected to a steam inlet pipe communicated with the interior of the sealing cylinder, the outlet end of the steam duct is provided with a steam-water separator for separating steam and water, the steam outlet of the steam-water separator is fixedly connected to the steam inlet pipe, and the outlet end of the steam inlet pipe is connected to the interior of the sealing cylinder.

[0008] Preferably, the water outlet of the steam-water separator is fixedly connected to a reflux pipe, the outlet end of the reflux pipe is fixedly connected to a water tank, and the water tank is fixedly connected to the outside of the installation box.

[0009] Preferably, the pneumatic mechanism further comprises a steam outlet pipe, the steam outlet pipe is fixedly connected to one end of the bottom of the sealing cylinder, the outlet end of the steam outlet pipe is fixedly connected to a condenser via a conduit, and the water outlet of the condenser is connected to the inside of the water tank via the conduit.

[0010] Preferably, the steam-water separator comprises a sealed box, a metal mesh is fixedly connected to the inner side of the sealed box, one end of the bottom of the sealed box is fixedly connected to a steam inlet pipe connected to a steam duct, the bottom of the sealed box is fixedly connected to a drain pipe connected to a return pipe, and one end of the top of the sealed box is connected to a steam inlet pipe.

[0011] Preferably, the water supply mechanism includes a cylinder, which is fixedly connected to the inner side of the sealed box, one end of the inner side of the cylinder is slidably connected to a sliding rod that penetrates the side wall of the cylinder, one end of the sliding rod is fixedly connected to a piston, the piston is slidably connected to the inner wall of the cylinder, the other end of the sliding rod is provided with a linkage part that drives the sliding rod to slide back and forth by cooperating with the rotation of the rotating shaft, the inlet end of the cylinder is fixedly connected to a water inlet pipe, the inlet end of the water inlet pipe is connected to the inside of the water tank, and the outlet end of the cylinder is fixedly connected to a water outlet pipe, the outlet end of the water outlet pipe is connected to the inlet end of the cooling coil.

[0012] Preferably, a water inlet check valve is fixedly connected to the water inlet pipe, and a water outlet check valve is fixedly connected to the water outlet pipe.

[0013] Preferably, the linkage member comprises an eccentric wheel, the eccentric wheel is rotatably connected to the outer side of the cylinder, the outer edge of the eccentric wheel is rotatably connected to a connecting rod, and one end of the connecting rod away from the eccentric wheel is hinged to the end of the sliding rod.

[0014] Preferably, the linkage member further comprises a first bevel gear coaxially fixedly connected to the eccentric wheel, a second bevel gear is fixedly connected to the middle portion of the rotating shaft, and the second bevel gear is meshed with the first bevel gear.

[0015] The present invention also provides a nitre reaction batch mixing production process, which is implemented according to a nitre reaction batch mixing production device and includes the following steps:

[0016] S1: starting the nitric acid pump and the dinitrate waste acid pump, introducing the concentrated nitric acid in the concentrated nitric acid tank and the dinitrate waste acid in the dinitrate waste acid tank into the mixing tank body for mixing, wherein the mass ratio of the dinitrate waste acid to the volume of the concentrated nitric acid is 15:1-60:1;

[0017] S2: When the dinitrate waste acid and concentrated nitric acid are mixed, a large amount of heat is released, and the cooling water inside the cooling coil absorbs the heat to heat up and become a steam state and cool the inside of the mixing tank. The outlet end of the cooling coil introduces the steam into the installation box through the steam conduit, so that the pneumatic mechanism drives the spiral stirring shaft to rotate under the action of the steam, so that the spiral stirring shaft stirs the dinitrate waste acid and the concentrated nitric acid, and the dinitrate waste acid and the concentrated nitric acid are fully mixed;

[0018] S3: Under the drive of the pneumatic mechanism, the water supply mechanism introduces cooling water into the cooling coil for replenishment, so that the cooling water can be continuously introduced into the cooling coil to absorb the heat inside the mixing tank for cooling. At the same time, the cooling water absorbs the heat and turns into steam to provide power for the pneumatic mechanism to ensure the rotation of the spiral stirring shaft;

[0019] S4: After the mixing is completed, the mixed acid liquid is introduced into the dinitro mixed acid cooler through the discharge pipe to indirectly cool the mixed acid, and then the mixed acid is introduced into the dinitro mixed acid tank by gravity, and finally transported to the dinitro mixed acid high-level tank by an acid pump.

[0020] The working principle and beneficial effects of the present invention are:

[0021] 1. The concentrated nitric acid in the concentrated nitric acid tank and the dinitrate waste acid in the dinitrate waste acid tank are introduced into the mixing tank through the nitric acid pump and the dinitrate waste acid pump respectively. At this time, the concentrated nitric acid and the dinitrate waste acid are locally mixed and release a large amount of heat, and the cooling water inside the cooling coil can absorb the heat inside the mixing tank to achieve cooling, avoiding the problem of excessive heat accumulation inside the mixing tank causing the occurrence of side reactions such as polynitro substances and oxidation, which affects the product quality;

[0022] 2. The cooling water inside the cooling coil absorbs heat and continues to heat up to become a steam state. Then the outlet end of the cooling coil introduces the steam into the installation box through the steam duct. This allows the pneumatic mechanism to drive the spiral stirring shaft to rotate under the action of high-pressure steam, so that the spiral stirring shaft stirs the concentrated nitric acid and dinitrogen waste acid, thereby greatly improving the mixing effect of the concentrated nitric acid and dinitrogen waste acid. At the same time, the water supply mechanism cooperates with the drive of the pneumatic mechanism to introduce cooling water into the cooling coil for continuous cooling. The whole process is released by finally converting the heat inside the mixing tank into mechanical energy, which can not only cool the inside of the mixing tank, but also provide power for the pneumatic mechanism by converting the heat absorbed by the cooling water into steam, thereby fully utilizing the heat inside the mixing tank without the need for external power, greatly saving energy use to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Figure 1 It is a structural schematic diagram of a nitre reaction batching and mixing production device of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a nitric acid mixed acid mixer of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the pneumatic mechanism of the present invention;

[0027] Figure 4 It is a schematic diagram of the local structure of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the steam-water separation element of the present invention;

[0029] Figure 6 The structure of the water supply mechanism of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 7 The structure of the water supply mechanism of the present invention is shown in FIG. Figure 2 ;

[0031] Figure 8 It is a schematic structural diagram of the linkage member of the present invention.

[0032] In the figure: 1, nitric acid mixer; 11, mixing tank; 12, discharge pipe; 13, cooling coil; 14, steam conduit; 15, spiral stirring shaft; 16, installation box; 17, pneumatic mechanism; 171, sealing cylinder; 172, rotating shaft; 173, steam turbine; 174, steam inlet pipe; 175, steam-water separator; 1751, sealing box; 1752, metal mesh; 1753, steam inlet pipe; 1754, drain pipe; 176, reflux pipe; 177, water box; 178, steam outlet pipe; 179, condenser; 18, water supply mechanism; 181, cylinder; 182, slide rod; 183, piston; 184, linkage; 1841, eccentric wheel; 1842, connecting rod; 1843, first bevel gear; 1844, second bevel gear; 185, water inlet pipe; 186, water outlet pipe; 187, water inlet check valve; 188, water outlet check valve; 2, concentrated nitric acid tank; 3, nitric acid pump; 4, dinitrogen waste acid tank; 5, dinitrogen waste acid pump. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 8As shown, this embodiment proposes a mononitrate reaction batching and mixing production device, including a mononitrate mixed acid mixer 1, the mononitrate mixed acid mixer 1 includes a mixing tank body 11, one end of the bottom of the mixing tank body 11 is connected to a nitric acid pump 3 through a conduit, the inlet end of the nitric acid pump 3 is connected to a concentrated nitric acid tank 2 through a conduit, one end of the bottom of the mixing tank body 11 is connected to a dinitrate waste acid pump 5 through a conduit, the inlet end of the dinitrate waste acid pump 5 is connected to a dinitrate waste acid tank 4 through a conduit, the other end of the bottom of the mixing tank body 11 is fixedly connected to a discharge pipe 12 for leading out the mononitrate mixed acid, and the mixing tank body A spiral stirring shaft 15 is rotatably connected to the inner side of the mixing tank body 11, a cooling coil 13 filled with cooling water is fixedly connected to one end of the inner side of the mixing tank body 11, a steam conduit 14 is fixedly connected to the outlet end of the cooling coil 13, an installation box 16 is fixedly connected to the outer side of the mixing tank body 11, a pneumatic mechanism 17 is provided on the inner side of the installation box 16 for driving the spiral stirring shaft 15 to rotate by introducing steam through the steam conduit 14, and a water supply mechanism 18 is provided on the top end of the inner side of the installation box 16 for introducing cooling water into the cooling coil 13 by cooperating with the drive of the pneumatic mechanism 17.

[0035] The concentrated nitric acid in the concentrated nitric acid tank 2 and the dinitrogen waste acid in the dinitrogen waste acid tank 4 are introduced into the mixing tank body 11 by the nitric acid pump 3 and the dinitrogen waste acid pump 5, respectively. At this time, the concentrated nitric acid and the dinitrogen waste acid are locally mixed and release a large amount of heat, and the cooling water in the cooling coil 13 can absorb the heat in the mixing tank body 11 to achieve cooling, thereby avoiding the problem that the excessive heat accumulation in the mixing tank body 11 causes the occurrence of side reactions such as polynitro substances and oxidation to affect the product quality;

[0036] The cooling water inside the cooling coil 13 continues to heat up and turns into a steam state after absorbing heat, and then the outlet end of the cooling coil 13 introduces the steam into the installation box 16 through the steam duct 14, which enables the pneumatic mechanism 17 to drive the spiral stirring shaft 15 to rotate under the action of high-pressure steam, so that the spiral stirring shaft 15 stirs the concentrated nitric acid and dinitrogen waste acid, thereby greatly improving the mixing effect of the concentrated nitric acid and dinitrogen waste acid. At the same time, the water supply mechanism 18 cooperates with the drive of the pneumatic mechanism 17 to introduce cooling water into the cooling coil 13 for continuous cooling. The whole process releases the heat inside the mixing tank body 11 by finally converting it into mechanical energy, which not only can realize the cooling of the inside of the mixing tank body 11, but also provide power for the pneumatic mechanism 17 by converting the heat absorbed by the cooling water into steam, thereby realizing the full utilization of the heat inside the mixing tank body 11 without the need for external power, greatly saving energy use to reduce costs.

[0037] Furthermore, the pneumatic mechanism 17 includes a sealing cylinder 171, which is fixedly connected to the inner side of the installation box 16, and a rotating shaft 172 is rotatably connected to the inner side of the sealing cylinder 171, one end of the rotating shaft 172 is fixedly connected to the spiral stirring shaft 15, and the other end of the rotating shaft 172 is fixedly connected to the steam turbine 173, and one end of the sealing cylinder 171 is fixedly connected to a steam inlet pipe 174 that communicates with the inside of the sealing cylinder 171, and the outlet end of the steam conduit 14 is provided with a steam-water separator 175 for separating steam and water, and the steam of the steam-water separator 175 is The steam outlet is fixedly connected to a steam inlet pipe 174, the outlet end of which is connected to the interior of a sealing cylinder 171, the water outlet of a steam-water separator 175 is fixedly connected to a return pipe 176, the outlet end of the return pipe 176 is fixedly connected to a water tank 177, the water tank 177 is fixedly connected to the outside of the mounting box 16, one end of the bottom of the sealing cylinder 171 is fixedly connected to a steam outlet pipe 178, the outlet end of the steam outlet pipe 178 is fixedly connected to a condenser 179 via a conduit, and the water outlet of the condenser 179 is connected to the interior of the water tank 177 via a conduit.

[0038] The cooling water inside the cooling coil 13 continues to heat up after absorbing heat and turns into a steam state. Then, the outlet end of the cooling coil 13 introduces the steam into the steam-water separator 175 through the steam duct 14. The steam-water separator 175 can separate the steam and water. The separated steam is introduced into the sealing tube 171 through the steam inlet pipe 174 to act on the steam turbine 173, so that the steam turbine 173 rotates, and the rotating shaft 172 rotates synchronously, which also causes the spiral stirring shaft 15 to rotate, so that the spiral stirring shaft 15 stirs the concentrated nitric acid and dinitrogen waste acid, thereby greatly improving the mixing effect of the concentrated nitric acid and dinitrogen waste acid; the separated water will be introduced into the water tank 177 through the reflux pipe 176 for reuse, which greatly saves the use of water resources.

[0039] Furthermore, the steam-water separator 175 includes a sealed box 1751, a metal mesh 1752 is fixedly connected to the inner side of the sealed box 1751, one end of the bottom of the sealed box 1751 is fixedly connected to a steam inlet pipe 1753 connected to the steam duct 14, the bottom of the sealed box 1751 is fixedly connected to a drain pipe 1754 connected to the return pipe 176, and one end of the top of the sealed box 1751 is connected to the steam inlet pipe 174.

[0040] The cooling water inside the cooling coil 13 continues to heat up and turns into steam after absorbing heat. Then, the outlet end of the cooling coil 13 introduces the steam into the steam pipe 1753 through the steam duct 14, and then introduces the steam into the sealed box 1751. At this time, the steam will flow upward through the metal mesh 1752, and the suspended water in the steam will condense on the metal mesh 1752 to separate the steam and water. The water droplets on the metal mesh 1752 will eventually fall into the drain pipe 1754 under the action of gravity and be discharged. Then, the water will be introduced into the water tank 177 through the reflux pipe 176. The separated steam is introduced into the sealed cylinder 171 through the steam inlet pipe 174 to act on the steam turbine 173 to rotate it.

[0041] Furthermore, the water supply mechanism 18 includes a cylinder 181, which is fixedly connected to the inner side of the sealed box 1751, and one end of the inner side of the cylinder 181 is slidably connected to a slide rod 182 that penetrates the side wall of the cylinder 181, and one end of the slide rod 182 is fixedly connected to a piston 183, and the piston 183 is slidably connected to the inner wall of the cylinder 181. The other end of the slide rod 182 is provided with a linkage 184 that drives the slide rod 182 to slide back and forth by cooperating with the rotation of the rotating shaft 172. The inlet end of the cylinder 181 is fixedly connected to a water inlet pipe 185, and the inlet end of the water inlet pipe 185 is connected to the cylinder 181. The inside of the water tank 177 is connected, the outlet end of the cylinder 181 is fixedly connected to a water outlet pipe 186, the outlet end of the water outlet pipe 186 is connected to the inlet end of the cooling coil 13, the water inlet pipe 185 is fixedly connected to a water inlet check valve 187, the water outlet pipe 186 is fixedly connected to a water outlet check valve 188, the linkage 184 includes an eccentric wheel 1841, the eccentric wheel 1841 is rotatably connected to the outside of the cylinder 181, the outer edge of the eccentric wheel 1841 is rotatably connected to a connecting rod 1842, and the end of the connecting rod 1842 away from the eccentric wheel 1841 is hinged to the end of the sliding rod 182.

[0042] Working principle: First, the concentrated nitric acid in the concentrated nitric acid tank 2 and the dinitrate waste acid in the dinitrate waste acid tank 4 are introduced into the mixing tank body 11 through the nitric acid pump 3 and the dinitrate waste acid pump 5 respectively. At this time, the concentrated nitric acid and the dinitrate waste acid flow locally and release a large amount of heat, and the cooling water inside the cooling coil 13 can absorb the heat inside the mixing tank body 11 to achieve cooling. After absorbing the heat, the cooling water inside the cooling coil 13 continues to heat up and turns into a steam state. Then, the outlet end of the cooling coil 13 introduces the steam into the steam pipe 1753 through the steam conduit 14, and then the steam is introduced into the sealed box 1751. At this time, the steam will flow upward through The metal mesh 1752, and the suspended water in the steam will condense on the metal mesh 1752 to separate the steam and water. The water drops on the metal mesh 1752 will eventually fall into the drain pipe 1754 under the action of gravity and be discharged. Then the water will be introduced into the water tank 177 through the reflux pipe 176. The separated steam will be introduced into the sealing cylinder 171 through the steam inlet pipe 174 to act on the steam turbine 173 to make it rotate, which will also make the spiral stirring shaft 15 rotate, so that the rotating shaft 172 rotates synchronously, and the spiral stirring shaft 15 will stir the concentrated nitric acid and dinitrogen waste acid, so that the mixing effect of the concentrated nitric acid and dinitrogen waste acid is greatly improved;

[0043] When the rotating shaft 172 rotates, the first bevel gear 1843 will rotate synchronously, so that the second bevel gear 1844 drives the eccentric wheel 1841 to rotate, which makes the connecting rod 1842 drive the sliding rod 182 to slide back and forth, and also makes the piston 183 slide back and forth inside the cylinder 181, so that the pressure inside the cylinder 181 increases and decreases periodically. When the pressure inside the cylinder 181 decreases, the water inlet pipe 185 will guide the cooling water inside the water tank 177 into the cylinder 181. When the pressure inside the cylinder 181 increases, the outlet pipe 185 will guide the cooling water inside the water tank 177 into the cylinder 181. The water pipe 186 guides the cooling water inside the cylinder 181 into the cooling coil 13 to replenish the cooling water for continuous cooling, thereby realizing the circulating flow of cooling water. The entire structure releases the heat inside the mixing tank body 11 by ultimately converting it into mechanical energy, which not only realizes continuous cooling of the inside of the mixing tank body 11, but also provides rotational power for the steam turbine 173 by converting the heat absorbed by the cooling water into steam, thereby realizing full utilization of the heat inside the mixing tank body 11 without the need for external power, greatly saving energy.

[0044] The present invention also provides a nitre reaction batch mixing production process, which is implemented according to a nitre reaction batch mixing production device and includes the following steps:

[0045] S1: Start the nitric acid pump 3 and the dinitrogen waste acid pump 5, introduce the concentrated nitric acid in the concentrated nitric acid tank 2 and the dinitrogen waste acid in the dinitrogen waste acid tank 4 into the mixing tank body 11 for mixing, wherein the mass ratio of the dinitrogen waste acid to the volume of the concentrated nitric acid is 15:1-60:1;

[0046] S2: When the dinitrate waste acid and concentrated nitric acid are mixed, a large amount of heat is released, and the cooling water inside the cooling coil 13 absorbs the heat to heat up and become a steam state and cool the inside of the mixing tank 11. The outlet end of the cooling coil 13 introduces steam into the installation box 16 through the steam conduit 14, so that the pneumatic mechanism 17 drives the spiral stirring shaft 15 to rotate under the action of the steam, so that the spiral stirring shaft 12 stirs the dinitrate waste acid and the concentrated nitric acid, so that the dinitrate waste acid and the concentrated nitric acid are fully mixed;

[0047] S3: Under the drive of the pneumatic mechanism 17, the water supply mechanism 18 introduces cooling water into the cooling coil 13 for replenishment, so that the cooling water can be continuously introduced into the cooling coil 13 to absorb the heat inside the mixing tank 11 for cooling. At the same time, the cooling water absorbs the heat and turns into steam to provide power for the pneumatic mechanism 17 to ensure the rotation of the spiral stirring shaft 12;

[0048] S4: After the mixing is completed, the mixed acid liquid is introduced into the dinitro mixed acid cooler through the discharge pipe 12 to perform indirect cooling treatment on the mixed acid, and then the mixed acid is introduced into the dinitro mixed acid tank by gravity, and finally transported to the dinitro mixed acid high-level tank by an acid pump.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A nitro-reaction batching and mixing production device, comprising a nitro-mixed acid mixer (1), characterized in that: The mononitrogen mixed acid mixer (1) comprises a mixing tank body (11), one end of the bottom of the mixing tank body (11) is connected to a nitric acid pump (3) via a conduit, the inlet end of the nitric acid pump (3) is connected to a concentrated nitric acid tank (2) via a conduit, one end of the bottom of the mixing tank body (11) is connected to a dinitrogen waste acid pump (5) via a conduit, the inlet end of the dinitrogen waste acid pump (5) is connected to a dinitrogen waste acid tank (4) via a conduit, the other end of the bottom of the mixing tank body (11) is fixedly connected to a discharge pipe (12) for discharging the mononitrogen mixed acid, and the inner side of the mixing tank body (11) is rotatably connected to a spiral stirring shaft (15) ), a cooling coil (13) filled with cooling water is fixedly connected to one end of the inner side of the mixing tank body (11), a steam conduit (14) is fixedly connected to the outlet end of the cooling coil (13), a mounting box (16) is fixedly connected to the outer side of the mixing tank body (11), a pneumatic mechanism (17) is provided on the inner side of the mounting box (16) for driving the spiral stirring shaft (15) to rotate by introducing steam through connection with the steam conduit (14), and a water supply mechanism (18) is provided on the top end of the inner side of the mounting box (16) for driving the pneumatic mechanism (17) to introduce cooling water into the cooling coil (13) 2. A nitre reaction batching and mixing production device according to claim 1, characterized in that: The steam-driven mechanism (17) comprises a sealing cylinder (171), the sealing cylinder (171) being fixedly connected to the inner side of the mounting box (16), the inner side of the sealing cylinder (171) being rotatably connected to a rotating shaft (172), one end of the rotating shaft (172) being fixedly connected to the spiral stirring shaft (15), the other end of the rotating shaft (172) being fixedly connected to a steam turbine (173), one end of the sealing cylinder (171) being fixedly connected to a steam inlet pipe (174) communicating with the interior of the sealing cylinder (171), the outlet end of the steam conduit (14) being provided with a steam-water separator (175) for separating steam and water, the steam outlet of the steam-water separator (175) being fixedly connected to the steam inlet pipe (174), the outlet end of the steam inlet pipe (174) being connected to the interior of the sealing cylinder (171).

3. A nitre reaction batching and mixing production device according to claim 2, characterized in that: The water outlet of the steam-water separator (175) is fixedly connected to a return pipe (176), the outlet end of the return pipe (176) is fixedly connected to a water tank (177), and the water tank (177) is fixedly connected to the outside of the installation box (16).

4. A nitre reaction batching and mixing production device according to claim 3, characterized in that: The pneumatic mechanism (17) further comprises a steam outlet pipe (178), the steam outlet pipe (178) being fixedly connected to one end of the bottom of the sealing cylinder (171), the outlet end of the steam outlet pipe (178) being fixedly connected to a condenser (179) via a conduit, and the water outlet of the condenser (179) being connected to the interior of the water tank (177) via a conduit.

5. A nitre reaction batching and mixing production device according to claim 4, characterized in that: The steam-water separator (175) comprises a sealed box (1751), the inner side of which is fixedly connected to a metal mesh (1752), one end of the bottom of the sealed box (1751) is fixedly connected to a steam inlet pipe (1753) connected to a steam conduit (14), the bottom of the sealed box (1751) is fixedly connected to a drain pipe (1754) connected to a return pipe (176), and one end of the top of the sealed box (1751) is connected to a steam inlet pipe (174).

6. A nitre reaction batching and mixing production device according to claim 4, characterized in that: The water supply mechanism (18) comprises a cylinder (181), the cylinder (181) being fixedly connected to the inner side of the sealing box (1751), one end of the inner side of the cylinder (181) being slidably connected to a sliding rod (182) penetrating the side wall of the cylinder (181), one end of the sliding rod (182) being fixedly connected to a piston (183), the piston (183) being slidably connected to the inner wall of the cylinder (181), and the other end of the sliding rod (182) being provided with a A linkage member (184) is provided which drives the slide bar (182) to slide back and forth by cooperating with the rotation of the rotating shaft (172); the inlet end of the cylinder (181) is fixedly connected to a water inlet pipe (185); the inlet end of the water inlet pipe (185) is connected to the interior of the water tank (177); the outlet end of the cylinder (181) is fixedly connected to a water outlet pipe (186); the outlet end of the water outlet pipe (186) is connected to the inlet end of the cooling coil (13).

7. A nitre reaction batching and mixing production device according to claim 6, characterized in that: The water inlet pipe (185) is fixedly connected to a water inlet check valve (187), and the water outlet pipe (186) is fixedly connected to a water outlet check valve (188).

8. A nitre reaction batching and mixing production device according to claim 7, characterized in that: The linkage member (184) comprises an eccentric wheel (1841), wherein the eccentric wheel (1841) is rotatably connected to the outside of the cylinder (181), and the outer edge of the eccentric wheel (1841) is rotatably connected to a connecting rod (1842), wherein one end of the connecting rod (1842) away from the eccentric wheel (1841) is hinged to the end of the sliding rod (182).

9. A nitre reaction batching and mixing production device according to claim 8, characterized in that: The linkage member (184) further comprises a first bevel gear (1843) coaxially fixedly connected to the eccentric wheel (1841); a second bevel gear (1844) is fixedly connected to the middle of the rotating shaft (172); the second bevel gear (1844) is meshed with the first bevel gear (1843).

10. A nitre reaction batch mixing production process, implemented according to the nitre reaction batch mixing production device according to claim 1, characterized in that: The steps include: S1: starting the nitric acid pump (3) and the dinitrate waste acid pump (5), introducing the concentrated nitric acid in the concentrated nitric acid tank (2) and the dinitrate waste acid in the dinitrate waste acid tank (4) into the mixing tank body (11) for mixing, wherein the mass ratio of the dinitrate waste acid to the volume of the concentrated nitric acid is 15:1-60:1; S2: When the dinitrate waste acid and the concentrated nitric acid are mixed, a large amount of heat is released, and the cooling water inside the cooling coil (13) absorbs the heat and heats up to become a steam state and cools the inside of the mixing tank (11). The outlet end of the cooling coil (13) introduces steam into the installation box (16) through the steam conduit (14), so that the pneumatic mechanism (17) drives the spiral stirring shaft (15) to rotate under the action of the steam, so that the spiral stirring shaft (12) stirs the dinitrate waste acid and the concentrated nitric acid, thereby fully mixing the dinitrate waste acid and the concentrated nitric acid; S3: Under the drive of the pneumatic mechanism (17), the water supply mechanism (18) introduces cooling water into the cooling coil (13) for replenishment, so that the cooling water can be continuously introduced into the cooling coil (13) to absorb the heat inside the mixing tank (11) for cooling. At the same time, the cooling water absorbs the heat and turns into steam to provide power for the pneumatic mechanism (17) to ensure the rotation of the spiral stirring shaft (12); S4: After the mixing is completed, the mixed acid liquid is introduced into the dinitrogen mixed acid cooler through the discharge pipe (12) to perform indirect cooling treatment on the mixed acid, and then the mixed acid is introduced into the dinitrogen mixed acid tank by gravity, and finally transported to the dinitrogen mixed acid high-level tank by an acid pump.

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