Neutralization liquid cooling system

Abstract

The utility model relates to the technical field of ammonia circulation, and discloses a neutralizing liquid cooling system which comprises a buffer tank, a neutralizing liquid conveying pipe is arranged at the top of the buffer tank, a bottom outlet of the buffer tank is connected with a medium inlet of a spiral heat exchange plate through a first pipeline, and a feeding pump is arranged on the first pipeline. A medium outlet of the spiral heat exchange plate is connected with a top inlet of the buffer tank through a second pipeline; the spiral heat exchange plate is connected with circulating water, and the first pipeline is connected with a filter press through a branch. The system improves the sodium naphthalene sulfonate yield, reduces the equipment cleaning cost, and improves the production benefits. The device is simple and compact in structure, the maintenance and cleaning cost of the device is effectively reduced, and good economical efficiency and practicability are shown.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of binaphthol production, in particular to a neutralization liquid cooling system. BACKGROUND

[0002] Traditional 2-naphthol production is mainly composed of sulfonation, hydrolysis, blowing naphthalene, neutralization, cooling, filtration, alkali fusion, dilution, acidification, boiling, drying and distillation units, and in the production process of 2-naphthol, the neutralization liquid contains a large amount of sodium naphthalenesulfonate, and the neutralization liquid is pressed under high temperature conditions, the content of sodium naphthalenesulfonate in the filtrate is too high, usually 4-6%, the conversion rate of naphthalene in sulfonation reaction is low, and the raw material naphthalene cannot be fully converted into the target product 2-naphthol, resulting in waste of raw materials and increased production cost.

[0003] The neutralization liquid cooling is a process of effectively recovering sodium naphthalenesulfonate, and the traditional cooling method uses ten cooling tanks connected in series for cooling, which has long cooling time, low cooling efficiency, large equipment occupation area, and the coil is easy to scale in the use process, and the cooling effect is weakened. UTILITY MODEL CONTENTS

[0004] The utility model discloses in order to solve the series problems such as long cooling time, low cooling efficiency, large equipment occupation area, and the coil is easy to scale in the use process, and the cooling effect is weakened in the prior art, and production efficiency is affected, and provides a neutralization liquid cooling system.

[0005] The utility model provides a neutralization liquid cooling system, including buffer tank, the top of buffer tank is equipped with neutralization liquid delivery pipe, and the bottom outlet of buffer tank is connected with the medium inlet of screw heat exchange plate through first pipe line, is equipped with feeding pump on first pipe line, and the medium outlet of screw heat exchange plate is connected with the top inlet of buffer tank through second pipe line, and the first pipe line is connected with filter press through branch line and is connected with circulating water.

[0006] In the implementation, the buffer tank is provided with a liquid level measuring device at the side, a temperature measuring device at the bottom for detecting the temperature in the tank, a neutralizing liquid delivery pipe at the top for connecting the previous process, i.e., the neutralizing process, and an outlet at the bottom connected to the medium inlet of the spiral heat exchange plate through a first pipeline, which is provided with a feed pump; the medium outlet of the spiral heat exchange plate is connected to the top inlet of the buffer tank through a second pipeline, which is provided with a temperature measuring device for measuring the temperature of the medium after heat exchange; the spiral heat exchange plate is connected to circulating water, which serves as the coolant of the spiral heat exchange plate to achieve cooling; the circulating water is provided with a temperature measuring device at the inlet and outlet of the spiral heat exchange plate, and the opening size of the feed pump is adjusted according to the temperature difference of the circulating water entering and leaving the spiral heat exchange plate, so as to adjust the flow rate of the medium; when the temperature difference is too large, the circulating water flow rate should be increased to achieve better heat exchange effect; the first pipeline is connected to a filter press through a branch, and the first pipeline is provided with a temperature measuring device behind the branch for detecting the temperature of the medium before heat exchange.

[0007] The utility model further provides a kind of neutralizing liquid cooling system, including two buffer tanks in series, and the buffer tank includes first buffer tank and second buffer tank, and the top of first buffer tank is equipped with neutralizing liquid delivery pipe, and the bottom outlet of first buffer tank is connected to the medium inlet of first spiral heat exchange plate through first pipeline, and first pipeline is equipped with first feed pump, and the medium outlet of first spiral heat exchange plate is connected to the top inlet of first buffer tank through second pipeline;First spiral heat exchange plate is connected to circulating water, and first pipeline is connected to third pipeline through tee, and tee is located behind first feed pump;

[0008] Third pipeline connects the top inlet of second buffer tank, and the bottom outlet of second buffer tank is connected to the medium inlet of second spiral heat exchange plate through fourth pipeline, and second pipeline is equipped with second feed pump, and the medium outlet of second spiral heat exchange plate is connected to the top inlet of second buffer tank through fifth pipeline;Second spiral heat exchange plate is connected to circulating water, and fourth pipeline is connected to filter press through tee cooperation pipeline, and tee is located behind second feed pump.

[0009] In implementation, two buffer tanks in series are included, liquid level measuring devices are arranged on the side of the buffer tanks, the neutralizing liquid capacity of the two buffer tanks is adjusted, temperature measuring devices are arranged on the bottom of the buffer tanks for detecting the temperature in the tanks, the buffer tanks include a first buffer tank and a second buffer tank, a neutralizing liquid delivery pipe is arranged on the top of the first buffer tank for connecting a previous process, i.e., a neutralizing process, the bottom outlet of the first buffer tank is connected to the medium inlet of a first spiral heat exchange plate through a first pipeline, a first feeding pump is arranged on the first pipeline, the medium outlet of the first spiral heat exchange plate is connected to the top inlet of the first buffer tank through a second pipeline, circulating water is connected to the first spiral heat exchange plate, a third pipeline is connected to the first pipeline through a tee joint, the tee joint is located behind the first feeding pump, a valve is arranged between the tee joint and the temperature measuring device on the first pipeline, a valve is arranged at the front end of the third pipeline, through the cooperation of the two valves, the liquid capacity in the two buffer tanks is distributed, and the replacement of the buffer tanks can also be realized;

[0010] The third pipeline is connected to the top inlet of the second buffer tank, the bottom outlet of the second buffer tank is connected to the medium inlet of a second spiral heat exchange plate through a fourth pipeline, a second feeding pump is arranged on the second pipeline, the medium outlet of the second spiral heat exchange plate is connected to the top inlet of the second buffer tank through a fifth pipeline, temperature measuring devices are respectively arranged on the second pipeline and the fifth pipeline, circulating water is connected to the second spiral heat exchange plate, temperature measuring devices are respectively arranged on the inlet and outlet of the circulating water between the first spiral heat exchange plate and the second spiral heat exchange plate, a filter press is connected to the fourth pipeline through a tee joint, the tee joint is located behind the second feeding pump, temperature measuring devices are respectively arranged on the first pipeline and the fourth pipeline behind the tee joint, through the multiple temperature measuring devices and the flow rate of the medium, the heat exchange efficiency of the spiral heat exchange plate can be detected, through the adjustment of the two valves on the first pipeline and the third pipeline, the distribution of the neutralizing liquid in the first buffer tank and the second buffer tank is adjusted, and the maintenance of the buffer tanks is realized.

[0011] Compared with the prior art, the neutralizing liquid cooling system has the following beneficial effects:

[0012] The neutralizing liquid cooling system has the following beneficial effects:

[0013] In the device, the spiral channel of the spiral plate heat exchanger can make the cold and hot fluids fully exchange heat under a smaller temperature difference, the heat exchange efficiency is high, the spiral plate heat exchanger is compact in structure, the spiral design makes the device have a larger heat exchange area in a smaller space, and a higher turbulence degree can be formed in the flow process, the boundary layer is thinned, and the heat transfer effect is strengthened.

[0014] The flow process of the spiral plate heat exchanger is simple, only two inlets and outlets, unlike ten series cooling tanks having multiple connection parts, so that the leakage points and fault points are reduced, the operation is relatively simple, and the maintenance workload is smaller. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Figure 1 is a schematic view of the embodiment 1 of the utility model.

[0016] Figure 2 Figure 2 is a schematic view of the embodiment 2 of the utility model.

[0017] The marks in the figure are as follows: L1 - first pipeline, L2 - second pipeline, L3 - third pipeline, L4 - fourth pipeline, L5 - fifth pipeline, L6 - neutralizing liquid conveying pipe,

[0018] 1 - buffer tank, 11 - first buffer tank, 12 - second buffer tank, 2 - spiral heat exchange plate, 21 - first spiral heat exchange plate, a - medium inlet, 22 - second spiral heat exchange plate, 3 - feed pump, 31 - first feed pump, 32 - second feed pump, 4 - filter press. DETAILED DESCRIPTION

[0019] The specific embodiments of the utility model will be described below in combination with the drawings. Embodiment 1

[0020] A neutralizing liquid cooling system, such as Figure 1As shown, the system includes a buffer tank 1. A liquid level measuring device is located on the side of the buffer tank, and a temperature measuring device is located at the bottom of the buffer tank to detect the internal temperature. A neutralizing liquid delivery pipe L6 is located at the top of the buffer tank 1 to connect to the previous process, i.e., the neutralization process. The bottom outlet of the buffer tank 1 is connected to the medium inlet a of the spiral heat exchange plate 2 via a first pipe L1. A feed pump 3 is installed on the first pipe L1. The medium outlet of the spiral heat exchange plate 2 is connected to the top inlet of the buffer tank 1 via a second pipe L2. A temperature measuring device is installed on the second pipe L2 to measure the temperature of the medium after heat exchange. The spiral heat exchange plate 2 is connected to circulating water, which acts as a refrigerant to cool the plate. Temperature measuring devices are installed at the inlet and outlet of the circulating water on the spiral heat exchange plate 2. The temperature difference between the circulating water entering and leaving the spiral heat exchange plate 2 is used to adjust the opening of the feed pump 3, thereby regulating the flow rate of the medium. When the temperature difference is too large, the circulating water flow rate should be increased to achieve a better heat exchange effect. The first pipeline L1 is connected to the filter press 4 via a branch. A temperature measuring device is installed after the branch on the first pipeline L1 to detect the temperature of the medium before heat exchange. Furthermore, by using multiple temperature measuring devices in conjunction with the flow rate of the medium, the heat exchange efficiency of the spiral heat exchange plate 2 can be detected. Example 2

[0021] A neutralizing liquid cooling system, such as Figure 2 As shown, the system includes two buffer tanks connected in series. A liquid level measuring device is installed on the side of each buffer tank to adjust the neutralization liquid capacity of the two buffer tanks 1. A temperature measuring device is installed at the bottom of each buffer tank to detect the internal temperature. The buffer tanks include a first buffer tank 11 and a second buffer tank 12. A neutralization liquid delivery pipe L6 is installed at the top of the first buffer tank 11 to connect to the previous process, i.e., the neutralization process. The bottom outlet of the first buffer tank 11 is connected to the medium inlet a of the first spiral heat exchange plate 21 via a first pipe L1. A first feed pump 31 is installed on the first pipe L1. The medium outlet of the first spiral heat exchange plate 21 is connected to the top inlet of the first buffer tank 11 via a second pipe L2. Circulating water is connected to the first spiral heat exchange plate 21. A third pipe L3 is connected to the first pipe L1 via a tee. The tee is located behind the first feed pump 31. A valve is installed between the tee and the temperature measuring device on the first pipe. A valve is installed at the front end of the third pipe. Through the cooperation of the two valves, the liquid capacity of the two buffer tanks is distributed, and the buffer tanks can also be replaced.

[0022] The third pipeline L3 is connected with the top inlet of the second buffer tank 12, the bottom outlet of the second buffer tank 12 is connected with the medium inlet a of the second spiral heat exchange plate 22 through the fourth pipeline L4, the second pipeline L2 is provided with the second feeding pump 32, the medium outlet of the second spiral heat exchange plate 22 is connected with the top inlet of the second buffer tank 12 through the fifth pipeline L5, the second pipeline L2 and the fifth pipeline L5 are respectively provided with temperature measuring devices; the second spiral heat exchange plate 22 is connected with circulating water, the circulating water is provided with temperature measuring devices at the inlets and outlets of the first spiral heat exchange plate 21 and the second spiral heat exchange plate 22, the fourth pipeline L4 is connected with the filter press 4 through a three-way cooperating pipeline, the three-way is located behind the second feeding pump 32, the first pipeline L1 and the fourth pipeline L4 are respectively provided with temperature measuring devices behind the three-way, the heat exchange efficiency of the spiral heat exchange plate 2 can be detected through the multiple temperature measuring devices and the flow rate of the medium, the distribution of the neutralizing liquid in the first buffer tank 11 and the second buffer tank 12 can be adjusted through the two valves on the first pipeline and the third pipeline, and the maintenance of the buffer tank can be realized.

[0023] The scope of the utility model claimed is not limited to the above specific embodiments, and for those skilled in the art, the utility model can have multiple variations and alterations, and any modification, improvement and equivalent replacement within the concept and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A neutralized liquid cooling system, characterized by: The application relates to a neutralization liquid buffer tank system, which comprises a buffer tank (1), the top of the buffer tank (1) is provided with a neutralization liquid conveying pipe (L6), the bottom outlet of the buffer tank (1) is connected with the medium inlet (a) of a spiral heat exchange plate (2) through a first pipeline (L1), a feeding pump (3) is arranged on the first pipeline (L1), the medium outlet of the spiral heat exchange plate (2) is connected with the top inlet of the buffer tank (1) through a second pipeline (L2), circulating water is connected to the spiral heat exchange plate (2), and the first pipeline (L1) is connected with a filter press (4) through a branch pipeline.

2. The neutralizing liquid cooling system according to claim 1, characterized in that: Temperature measuring devices are arranged on the second pipeline (L2) and the first pipeline (L1) located behind the branch pipeline.

3. The neutralizing liquid cooling system of claim 1, wherein: Temperature measuring devices are arranged on the circulating water at the inlet and outlet of the spiral heat exchange plate (2).

4. A neutralized liquid cooling system, characterized by: The application relates to a neutralization liquid buffer tank system, which comprises two buffer tanks connected in series, the buffer tanks comprise a first buffer tank (11) and a second buffer tank (12), the top of the first buffer tank (11) is provided with a neutralization liquid conveying pipe (L6), the bottom outlet of the first buffer tank (11) is connected with the medium inlet (a) of a first spiral heat exchange plate (21) through a first pipeline (L1), a first feeding pump (31) is arranged on the first pipeline (L1), the medium outlet of the first spiral heat exchange plate (21) is connected with the top inlet of the first buffer tank (11) through a second pipeline (L2), circulating water is connected to the first spiral heat exchange plate (21), a third pipeline (L3) is connected to the first pipeline (L1) through a tee joint, and the tee joint is located behind the first feeding pump (31). The third pipeline (L3) is connected with the top inlet of the second buffer tank (12), the bottom outlet of the second buffer tank (12) is connected with the medium inlet (a) of a second spiral heat exchange plate (22) through a fourth pipeline (L4), a second feeding pump (32) is arranged on the second pipeline (L2), the medium outlet of the second spiral heat exchange plate (22) is connected with the top inlet of the second buffer tank (12) through a fifth pipeline (L5), circulating water is connected to the second spiral heat exchange plate (22), and a filter press (4) is connected to the fourth pipeline (L4) through a tee joint pipeline, and the tee joint is located behind the second feeding pump (32).

5. The neutralization liquid cooling system according to claim 1 or 4, characterized in that: Liquid level measuring devices are arranged on the sides of the buffer tanks, and temperature measuring devices are arranged on the bottoms of the buffer tanks.

6. The neutralizing fluid cooling system of claim 4, wherein: Temperature measuring devices are arranged on the second pipeline (L2) and the fifth pipeline (L5), and temperature measuring devices are arranged on the first pipeline (L1) and the fourth pipeline (L4) located behind the tee joints.

7. The neutralizing fluid cooling system of claim 4, wherein: Temperature measuring devices are arranged on the circulating water at the inlet and outlet of the first spiral heat exchange plate (21) and the second spiral heat exchange plate (22).

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