Cis-acid storage tank

Abstract

The utility model provides a cis-acid storage tank which comprises a tank body, a water tank, a heat exchange pipe, a four-way connector, a flushing valve, a first sampling pipe, a first sampling valve, a second sampling pipe, a second sampling valve, an air inlet pipe and a stop valve, the water tank is arranged on the outer side of the tank body, the heat exchange pipe is arranged in the tank body, and one end of the heat exchange pipe extends out of the tank body to be connected with the water tank; the heat exchange pipe, the first sampling pipe, the second sampling pipe and the air inlet pipe are respectively connected to the four-way connector, the flushing valve is arranged on the heat exchange pipe and is close to the four-way connector, the first sampling valve is arranged on the first sampling pipe, the second sampling valve is arranged on the second sampling pipe, and the stop valve is arranged on the air inlet pipe; after water entering the heat exchange pipe from the water tank is heated by a cis-acid solution in the tank body, the four-way connector, the second sampling pipe and the second sampling valve are flushed, then water in the second sampling pipe is emptied through air inflow of the air inlet pipe, and the second sampling pipe and the second sampling valve can be prevented from being blocked by cis-acid crystals.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a succinic acid storage tank. Background Art

[0002] Maleic acid is also called maleic acid, which is mainly used in pharmaceuticals and resin synthesis, and is also used as a preservative for oils and greases. At high concentrations, the solution of maleic acid is very easy to precipitate crystals, which affects its application. Therefore, the concentration of the prepared maleic acid solution cannot be too high, and a certain temperature must be maintained to ensure that the solution does not precipitate crystals.

[0003] Since the hydrolysis reaction is exothermic, the temperature of the cis-acid solution obtained by hydrolysis is 60-65°C. It is placed in a cis-acid storage tank for short-term storage. During the storage period, the temperature in the tank is basically maintained above 55°C in summer and above 50°C in winter. The cis-acid solution begins to crystallize below 40°C.

[0004] In an open environment, the volatile amount of solvent water in the maleic acid solution is very large, and crystals will soon precipitate. The existing tank sampling valve is set outside the tank, and the sampling valve temperature cannot be kept above 40°C all the time. In addition, it is exposed to the air, causing the sampling valve to be quickly filled with maleic acid crystals and blocked. The sampling valve needs to be opened for the next sampling, which is time-consuming and labor-intensive, delaying detection and production. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a succinic acid storage tank with a sampling valve that is not easily blocked.

[0006] A succinic acid storage tank provided by the utility model comprises:

[0007] Tank;

[0008] A water tank, the water tank being arranged outside the tank body;

[0009] A heat exchange tube, wherein the heat exchange tube is disposed in the tank body and close to the bottom of the tank body, and one end of the heat exchange tube extends out of the tank body and is connected to the water tank;

[0010] A four-way joint, the four-way joint is arranged in the tank body, and a first interface of the four-way joint is connected to an end of the heat exchange tube away from the water tank;

[0011] A flush valve, the flush valve being arranged on the heat exchange tube and close to the four-way joint;

[0012] A first sampling tube, the first sampling tube is connected to the second interface of the four-way connector, and a first sampling valve is provided on the first sampling tube;

[0013] a second sampling tube, one end of which is connected to the third interface of the four-way connector, the other end of which extends out from the bottom of the tank body and is provided with a second sampling valve;

[0014] An air intake pipe, one end of which is connected to the fourth interface of the four-way joint, and the other end of which extends out of the tank body and is provided with a stop valve.

[0015] In one embodiment of the utility model, the first sampling valve includes a first valve body connected to the first sampling tube, a first valve core disposed outside the first valve body, a first valve cover connected to the first valve body, and a first valve stem disposed on the first valve cover and connected to the first valve core, the first valve cover is fixedly connected to the tank body, and the first valve stem extends out of the tank body.

[0016] In one embodiment of the utility model, the flush valve includes a second valve body connected to the heat exchange tube, a second valve core arranged inside the second valve body, a second valve cover connected to the second valve body, and a second valve stem arranged on the second valve cover and connected to the second valve core, the second valve cover is fixedly connected to the tank body, and the second valve stem extends out of the tank body.

[0017] In one embodiment of the present invention, the position of the water tank is higher than the position of the four-way joint.

[0018] In one embodiment of the present invention, the heat exchange tube is arranged at the bottom of the tank in a bent manner.

[0019] In one embodiment of the utility model, a breathing valve is provided on the top of the tank body.

[0020] One beneficial effect of the utility model is that the heat exchange tube, the first sampling tube, the second sampling tube and the air intake pipe of the succinic acid storage tank are connected through a four-way joint in the tank body. After the succinic acid solution in the tank body completes sampling through the first sampling tube and the second sampling tube, the first sampling valve is closed, the flushing valve on the heat exchange tube is opened, and the water in the water tank enters the heat exchange tube and flushes the four-way joint, the second sampling tube and the second sampling valve; then the flushing valve is closed, the stop valve on the air intake pipe is opened, and the water in the second sampling tube can be drained by air intake through the air intake pipe, thereby effectively preventing the second sampling tube and the second sampling valve from being blocked by succinic acid crystals; after the water in the water tank enters the heat exchange tube, it is heated by the succinic acid solution in the tank body, which can increase the water temperature and achieve a better effect of removing residual succinic acid, and there is no need to add additional heating equipment to heat the water, which is beneficial to reducing production costs.

[0021] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0023] Figure 1 It is a schematic diagram of the overall structure of the cis-acid storage tank provided by the utility model;

[0024] Figure 2 It is a structural schematic diagram of a first sampling valve of a succinic acid storage tank provided by the utility model;

[0025] Figure 3 It is a structural schematic diagram of a flushing valve of a succinic acid storage tank provided by the utility model;

[0026] Figure 4 It is a structural schematic diagram of the heat exchange tube of the succinic acid storage tank provided by the utility model.

[0027] Figures 1 to 4 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0028] 1. Tank; 2. Water tank; 3. Heat exchange tube; 4. Four-way joint; 5. Flush valve; 6. First sampling tube; 7. First sampling valve; 8. Second sampling tube; 9. Second sampling valve; 10. Air inlet pipe; 11. Stop valve; 12. Breathing valve;

[0029] 51. second valve body; 52. second valve cover; 53. second valve stem;

[0030] 71. First valve body; 72. First valve cover; 73. First valve stem. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0034] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0035] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0036] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0037] Figures 1 to 4 An embodiment of a succinic acid storage tank provided by the utility model is shown, and the succinic acid storage tank includes a tank body 1, a water tank 2, a heat exchange tube 3, a four-way joint 4, a flushing valve 5, a first sampling tube 6, a first sampling valve 7, a second sampling tube 8, a second sampling valve 9, an air inlet pipe 10 and a stop valve 11.

[0038] like Figure 1 As shown, the water tank 2 is arranged outside the tank body 1, the heat exchange tube 3 is arranged inside the tank body 1 and close to the bottom of the tank body 1, and one end of the heat exchange tube 3 extends out of the tank body 1 and is connected to the water tank 2. A four-way joint 4 is arranged inside the tank body 1, and the four-way joint 4 has a first interface, a second interface, a third interface and a fourth interface, and the first interface of the four-way joint 4 is connected to the end of the heat exchange tube 3 away from the water tank 2. A flush valve 5 is arranged on the heat exchange tube 3 and close to the four-way joint 4.

[0039] The first sampling tube 6 is connected to the second interface of the four-way connector 4, and a first sampling valve 7 is provided on the first sampling tube 6. The first sampling tube 6 is located inside the tank body 1, and the cis-acid solution in the tank body 1 can enter the first sampling tube 6.

[0040] One end of the second sampling tube 8 is connected to the third interface of the four-way connector 4, and the other end of the second sampling tube 8 extends from the bottom of the tank body 1 and is provided with a second sampling valve 9, which is located outside the tank body 1 for easy operation.

[0041] One end of the air inlet pipe 10 is connected to the fourth interface of the four-way joint 4, and the other end of the air inlet pipe 10 extends out of the tank body 1 and is provided with a stop valve 11, which is located outside the tank body 1 for easy operation. A pressure gauge can also be installed on the air inlet pipe 10 to detect the pressure in the pipe.

[0042] Tank 1 is used to store the cis-acid solution obtained by hydrolysis. Since the hydrolysis process releases heat, the temperature of the cis-acid solution is usually above 50°C. The normal temperature water in water tank 2 can enter heat exchange tube 3, and heat is exchanged with the cis-acid solution in tank 1 through heat exchange tube 3, so that the temperature of the water increases. Since the amount of water in heat exchange tube 3 is small, the temperature of the cis-acid solution in tank 1 is less affected, and crystals of the cis-acid solution will not be precipitated.

[0043] During sampling, the flushing valve 5 and the stop valve 11 are closed, the first sampling valve 7 and the second sampling valve 9 are opened, and the succinic acid solution in the tank body 1 enters the first sampling tube 6, and then passes through the four-way joint 4 and is discharged from the second sampling tube 8. After the sampling is completed through the second sampling tube 8, the first sampling valve 7 is closed, the flushing valve 5 is opened, and the water in the heat exchange tube 3 is discharged through the second sampling tube 8, so that the four-way joint 4, the second sampling tube 8 and the second sampling valve 9 can be flushed to discharge the succinic acid remaining in the second sampling tube 8, and then the flushing valve 5 and the second sampling valve 9 are closed.

[0044] The first sampling tube 6 and the first sampling valve 7 are located inside the tank body 1, and can maintain the temperature through the cis-acid solution in the tank body 1, so they will not be blocked by the precipitation of crystals. The second sampling tube 8 and the second sampling valve 9 can avoid being blocked by crystals after being flushed with water. After the water in the heat exchange tube 3 is heated by the cis-acid solution in the tank body 1, the effect of removing residual cis-acid is better, and there is no need to add additional heating equipment to heat the water, which is conducive to reducing production costs.

[0045] When the ambient temperature is low in winter, in order to avoid ice formation in the second sampling tube 8, the air inlet pipe 10 is connected to the air source. After the sampling is completed and the four-way joint 4, the second sampling tube 8 and the second sampling valve 9 are flushed with water in the heat exchange tube 3, the flushing valve 5 is closed and the stop valve 11 is opened. The air source sends compressed air into the air inlet pipe 10. The compressed air can enter the second sampling tube 8 to discharge the remaining water, thereby preventing ice formation.

[0046] Continue to refer Figure 1 In order to ensure the safety of the tank body 1, a breathing valve 12 is provided on the top of the tank body 1. The breathing valve 12 can maintain the pressure balance between the inside and outside of the tank body 1 and can reduce the volatilization of the cis-acid solution in the tank body 1.

[0047] Specifically, the position of the water tank 2 is higher than that of the four-way joint 4, and the water level in the water tank 2 should be maintained at a position higher than the four-way joint 4. The water in the water tank 2 can reach the four-way joint 4 through the heat exchange tube 3 under the action of gravity, which is convenient to use.

[0048] In some embodiments, Figure 2 As shown, the first sampling valve 7 includes a first valve body 71 connected to the first sampling tube 6, a first valve core (not shown in the figure) arranged in the first valve body 71, a first valve cover 72 connected to the first valve body, and a first valve stem 73 arranged on the first valve cover 72 and connected to the first valve core. The first valve core can be controlled to open or close by the first valve stem 73. The first valve cover 72 is fixedly connected to the tank body 1, and the outer end of the first valve stem 73 extends out of the tank body 1 for easy operation. Specifically, a mounting hole for mounting the first valve cover 72 is provided on the tank body 1, and the first valve cover 72 is provided with an extension portion embedded in the mounting hole and sealed.

[0049] In some embodiments, Figure 3 As shown, the flush valve 5 includes a second valve body 51 connected to the heat exchange tube 3, a second valve core (not shown in the figure) arranged in the second valve body 51, a second valve cover 52 connected to the second valve body, and a second valve stem 53 arranged on the second valve cover 52 and connected to the second valve core, and the first valve core can be controlled to be opened or closed by the second valve stem 53. The second valve cover 52 is fixedly connected to the tank body 1, and the second valve stem 53 extends out of the tank body 1 for easy operation. Specifically, a mounting hole for mounting the second valve cover 52 is provided on the tank body 1, and the second valve cover 52 is provided with an extension portion embedded in the mounting hole and sealed.

[0050] In some embodiments, Figure 4 As shown, the heat exchange tube 3 is bent and arranged at the bottom of the tank body 1, which can increase the contact area with the succinic acid solution, improve the heat exchange effect, and increase the amount of water in the heat exchange tube 3, so that the four-way connector 4, the second sampling tube 8 and the second sampling valve 9 can be fully flushed.

[0051] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present invention is defined by the appended claims.

Claims

1. A succinic acid storage tank, characterized in that: include: Tank; A water tank, the water tank being arranged outside the tank body; A heat exchange tube, wherein the heat exchange tube is disposed in the tank body and close to the bottom of the tank body, and one end of the heat exchange tube extends out of the tank body and is connected to the water tank; A four-way joint, the four-way joint is arranged in the tank body, and a first interface of the four-way joint is connected to an end of the heat exchange tube away from the water tank; A flush valve, the flush valve being arranged on the heat exchange tube and close to the four-way joint; A first sampling tube, the first sampling tube is connected to the second interface of the four-way connector, and the first sampling tube is provided with a first sampling valve; a second sampling tube, one end of which is connected to the third interface of the four-way connector, the other end of which extends out from the bottom of the tank body and is provided with a second sampling valve; An air intake pipe, one end of which is connected to the fourth interface of the four-way joint, and the other end of which extends out of the tank body and is provided with a stop valve.

2. The succinic acid storage tank according to claim 1, characterized in that: The first sampling valve includes a first valve body connected to the first sampling tube, a first valve core disposed inside the first valve body, a first valve cover connected to the first valve body, and a first valve stem disposed on the first valve cover and connected to the first valve core. The first valve cover is fixedly connected to the tank body, and the first valve stem extends out of the tank body.

3. The succinic acid storage tank according to claim 1 or 2, characterized in that: The flush valve includes a second valve body connected to the heat exchange tube, a second valve core arranged inside the second valve body, a second valve cover connected to the second valve body, and a second valve stem arranged on the second valve cover and connected to the second valve core, the second valve cover is fixedly connected to the tank body, and the second valve stem extends out of the tank body.

4. The succinic acid storage tank according to claim 1, characterized in that: The position of the water tank is higher than that of the four-way joint.

5. The succinic acid storage tank according to claim 1, characterized in that: The heat exchange tube is arranged at the bottom of the tank body in a bent manner.

6. The succinic acid storage tank according to claim 1, characterized in that: A breathing valve is arranged on the top of the tank body.

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