阅读说明：本技术 一种碱液柜加热系统及船舶 (Alkali lye cabinet heating system and boats and ships ) 是由 张明 张建宾 高建波 何硕 于 2021-08-26 设计创作，主要内容包括：本发明涉及船舶气体排放技术领域,具体公开了一种碱液柜加热系统及船舶。该碱液柜加热系统包括碱液柜、盘管、循环泵和加热单元。碱液柜用于容纳碱液。盘管设置于碱液柜内,以加热碱液。循环泵的入水口与盘管的出口连通,循环泵的排水口与盘管的入口连通,以形成循环管路。加热单元能够加热循环管路内的水。船舶包括上述的碱液柜加热系统。该碱液柜加热系统的盘管能够加热碱液柜内的氢氧化钠溶液,能够使氢氧化钠溶液保持在适宜的温度范围内,避免氢氧化钠溶液温度过低发生结晶,影响使用。而且能够避免氢氧化钠溶液温度过高,导致腐蚀性增强,对碱液柜造成腐蚀破坏,提高了船舶的安全性。(The invention relates to the technical field of ship gas emission, and particularly discloses an alkali liquor cabinet heating system and a ship. The heating system of the alkali liquor cabinet comprises the alkali liquor cabinet, a coil pipe, a circulating pump and a heating unit. The alkali liquor cabinet is used for containing alkali liquor. The coil pipe is arranged in the alkali liquor cabinet to heat the alkali liquor. The water inlet of the circulating pump is communicated with the outlet of the coil pipe, and the water outlet of the circulating pump is communicated with the inlet of the coil pipe to form a circulating pipeline. The heating unit is capable of heating water in the circulation line. The ship comprises the alkali liquor cabinet heating system. This alkali lye cabinet heating system's coil pipe can heat the sodium hydroxide solution in the alkali lye cabinet, can make the sodium hydroxide solution keep in suitable temperature range, avoids the sodium hydroxide solution temperature to hang down to take place the crystallization excessively, influences the use. And can avoid the too high temperature of sodium hydroxide solution, lead to the corrosivity reinforcing, cause the corruption to the alkali lye cabinet and destroy, improve the security of boats and ships.)

1. A heating system of an alkali lye cabinet is characterized by comprising:

the alkali liquor cabinet (1) is used for containing alkali liquor;

the coil pipe (3) is arranged in the alkali liquor cabinet (1) to heat alkali liquor;

a circulating pump (2) with a water inlet communicating with an outlet of the coil (3), a water outlet of the circulating pump (2) communicating with an inlet of the coil (3) to form a circulating line;

a heating unit (6) configured to be able to heat the water within the circulation line.

2. A lye cabinet heating system according to claim 1, further comprising:

the first sensor (4) is used for measuring the temperature of the alkali liquor in the alkali liquor cabinet (1);

the circulation pump (2) is configured to be switched on when the temperature value measured by the first sensor (4) is lower than a first set value; or, when the temperature value measured by the first sensor (4) is higher than a second set value, the system is closed.

3. A lye cabinet heating system according to claim 1, further comprising:

and the expansion cabinet (5) is communicated with the circulating pipeline and is used for storing water in the circulating pipeline or supplementing water into the circulating pipeline.

4. The lye cabinet heating system of claim 1, characterized in that said circulation pump (2) is provided in plurality, a plurality of said circulation pumps (2) being connected in parallel in said circulation line.

5. A lye cabinet heating system according to any of the claims 1 to 4, characterized in that the coil pipes (3) are evenly distributed at the bottom of the lye cabinet (1).

6. Lye cabinet heating system according to claim 1, characterized in that said heating unit (6) comprises:

a heat exchanger (61) arranged between the circulation pump (2) and the coil (3) to heat the circulation line;

a steam system (62) for generating high temperature steam; and

a steam line (63), through which the steam system (62) can communicate with the heat exchanger (61) through the steam line (63).

7. The lye cabinet heating system of claim 6, wherein the heating unit (6) further comprises:

the second sensor (64) is used for measuring the temperature of the alkali liquor in the alkali liquor cabinet (1);

a first regulating valve (65) mounted in communication on the steam line (63), the first regulating valve (65) being configured to open the steam line (63) to communicate the steam system (62) with the heat exchanger (61) when the temperature value measured by the second sensor (64) is lower than a third set value.

8. The lye cabinet heating system of claim 6, wherein the heating unit (6) further comprises:

a third sensor (66) for measuring the temperature within the circulation line;

a second regulating valve (67) communicatively mounted on the steam line (63), the second regulating valve (67) being configured to adjust an opening of the steam line (63) to reduce a steam flow rate when the temperature value measured by the third sensor (66) is higher than a fourth set value.

9. The lye cabinet heating system of claim 6, wherein the heating unit (6) further comprises:

the automatic drain valve group (69), the heat exchanger (61) with the automatic drain valve group (69) along the flow direction of steam in the steam pipeline (63) is installed on the steam pipeline (63) in sequence, so that condensed water in the steam pipeline (63) is discharged.

10. A vessel comprising a lye cabinet heating system according to any of the claims 1 to 9.

Technical Field

The invention belongs to the technical field of ship gas emission, and particularly relates to an alkali liquor cabinet heating system and a ship.

Background

In order to meet the requirements of ship gas emission regulations, sulfur and nitrogen removal systems are arranged on ships at present. Sodium hydroxide solution, as an alkaline liquid, is often used as a neutralizer in sulfur and nitrogen removal systems because of its simple manufacture and low cost.

In the existing tail gas desulfurization system of the marine diesel engine, an alkali liquor cabinet is generally configured to contain a sodium hydroxide solution. Due to the physical property of the sodium hydroxide solution, the sodium hydroxide solution can crystallize when the temperature is too low, and the corrosivity of the sodium hydroxide solution can be enhanced when the temperature is too high, so that the service life of the alkali liquor cabinet is shortened, and potential safety hazards such as liquor leakage of the alkali liquor cabinet can be caused.

At present, a circulating pump unit pumps a sodium hydroxide solution in an alkali liquor cabinet into a heating circulating pipeline for circulating heating so as to complete heating and heat preservation of the sodium hydroxide solution. The problems of the heating mode are as follows: the sodium hydroxide solution is easy to corrode the circulating pipeline in the long-time circulating process, the potential safety hazard of leakage of the circulating pipeline is increased, the service life of the circulating pipeline is shortened, and the cost is increased. Meanwhile, the temperature difference of each part of the sodium hydroxide solution in the circulating pipeline is large, which is not beneficial to accurately measuring and controlling the heating temperature.

Disclosure of Invention

One objective of the present invention is to provide a heating system for an alkali lye tank, so as to reduce the corrosion of the sodium hydroxide solution to the circulation pipeline and improve the safety of the heating system for the alkali lye tank.

Another object of the present invention is to provide a ship, which can reduce the corrosion of the circulating pipeline caused by the sodium hydroxide solution, and improve the safety of the heating system of the lye tank and the ship.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a lye cabinet heating system comprising:

the alkali liquor cabinet is used for accommodating alkali liquor;

the coil pipe is arranged in the alkali liquor cabinet to heat the alkali liquor;

a water inlet of the circulating pump is communicated with the outlet of the coil pipe, and a water outlet of the circulating pump is communicated with the inlet of the coil pipe to form a circulating pipeline;

a heating unit configured to be able to heat the water within the circulation line.

Further, the heating system of the lye cabinet also comprises:

the first sensor is used for measuring the temperature of the alkali liquor in the alkali liquor cabinet;

the circulation pump is configured to be started when the temperature value measured by the first sensor is lower than a first set value; or when the temperature value measured by the first sensor is higher than a second set value, the system is closed.

Further, the heating system of the lye cabinet also comprises:

and the expansion cabinet is communicated with the circulating pipeline and is used for storing the water in the circulating pipeline or supplementing water into the circulating pipeline.

Further, the circulation pump has a plurality of, and a plurality of the circulation pumps are connected in parallel in the circulation line.

Further, the coil pipes are uniformly distributed at the bottom of the alkali liquor cabinet.

Further, the heating unit includes:

a heat exchanger disposed between the circulation pump and the coil to heat the circulation line;

a steam system for generating high temperature steam; and

a steam line through which the steam system can communicate with the heat exchanger.

Further, the heating unit further includes:

the second sensor is used for measuring the temperature of the alkali liquor in the alkali liquor cabinet;

a first regulating valve communicatively mounted on the steam line, the first regulating valve configured to open the steam line to communicate the steam system with the heat exchanger when the temperature value measured by the second sensor is lower than a third set value.

Further, the heating unit further includes:

a third sensor for measuring a temperature within the circulation line;

and the second regulating valve is communicated and installed on the steam pipeline and is configured to regulate the opening of the steam pipeline to reduce the steam flow when the temperature value measured by the third sensor is higher than a fourth set value.

Further, the heating unit further includes:

and the heat exchanger and the automatic drain valve group are sequentially arranged on the steam pipeline along the flow direction of the steam in the steam pipeline so as to discharge condensed water in the steam pipeline.

A ship comprises the alkali liquor cabinet heating system.

The invention has the beneficial effects that:

the heating system for the alkali liquor cabinet comprises the alkali liquor cabinet, a coil pipe, a circulating pump and a heating unit, wherein the circulating pump and the coil pipe form a circulating pipeline, and the heating unit heats water in the circulating pipeline, so that the coil pipe can heat sodium hydroxide solution in the alkali liquor cabinet, the sodium hydroxide solution is kept in a proper temperature range, and the phenomenon that the sodium hydroxide solution is crystallized due to too low temperature and affects use is avoided. And can avoid the too high temperature of sodium hydroxide solution, lead to the corrosivity reinforcing, lead to corroding the destruction to the alkali lye cabinet, improve the security of alkali lye cabinet.

Meanwhile, the coil pipe is used for heating the sodium hydroxide solution in the alkali liquor cabinet, so that the temperature in the alkali liquor cabinet can be kept balanced. Compared with the method for circularly heating the sodium hydroxide solution through the circulating pipeline, the heating system of the alkali liquor cabinet can prevent the sodium hydroxide solution from corroding the circulating pipeline, and improves the safety of the heating system of the alkali liquor cabinet. In addition, the temperature difference of the sodium hydroxide solution in each part of the circulating pipeline can be avoided from being too large, and the actual temperature of the sodium hydroxide solution can be accurately measured.

The ship provided by the invention comprises the alkali liquor cabinet heating system, so that the sodium hydroxide solution can be kept in a proper temperature range, and the phenomenon that the sodium hydroxide solution is crystallized due to too low temperature to affect use is avoided. And can avoid the too high temperature of sodium hydroxide solution, lead to the corrosivity reinforcing, cause the corruption to the alkali lye cabinet and destroy, improve the security of boats and ships.

Drawings

FIG. 1 is a schematic view of the piping arrangement of the heating system of the lye tank provided by the embodiment of the present invention.

The component names and designations in the drawings are as follows:

1. an alkali liquor cabinet; 2. a circulation pump; 3. a coil pipe; 4. a first sensor; 5. an expansion cabinet;

6. a heating unit; 61. a heat exchanger; 62. a steam system; 63. a steam line; 64. a second sensor; 65. a first regulating valve; 66. a third sensor; 67. a second regulating valve; 68. a steam filter; 69. an automatic drain valve group.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

This embodiment discloses a boats and ships, in the diesel engine tail gas desulfurization system of boats and ships, generally dispose 1 holds sodium hydroxide solution of alkali lye cabinets. Because the sodium hydroxide solution can crystallize when the temperature is too low and the corrosivity of the sodium hydroxide solution can be enhanced when the temperature is too high, the sodium hydroxide solution is generally heated and kept warm by a heating system, so that the sodium hydroxide solution is always in a proper temperature range.

In the existing heating system, the sodium hydroxide solution in the alkali liquor cabinet 1 is pumped into a heating circulation pipeline through a circulation pump for circulation heating. Because the sodium hydroxide solution is easy to corrode the circulating pipeline in the long-time circulating process, the potential safety hazard of leakage of the circulating pipeline is increased, and the service life of the circulating pipeline is shortened. Meanwhile, the temperature difference of each part of the sodium hydroxide solution in the circulating pipeline is large, which is not beneficial to accurately measuring and controlling the heating temperature.

In order to solve the above problem, as shown in fig. 1, the embodiment further discloses a heating system of the lye cabinet, which comprises a lye cabinet 1, a coil pipe 3, a circulating pump 2 and a heating unit 6. The lye cabinet 1 is used for containing lye (sodium hydroxide solution). The coil pipe 3 is arranged in the alkali liquor cabinet 1 to heat the alkali liquor. The water inlet of the circulating pump 2 is communicated with the outlet of the coil pipe 3, and the water outlet of the circulating pump 2 is communicated with the inlet of the coil pipe 3 to form a circulating pipeline. The heating unit 6 is capable of heating the water in the circulation line.

In the present embodiment, the flowing medium in the circulation line is water, which is easy to obtain and has a very low cost. Moreover, the water does not corrode the circulation pipeline. Even if the circulation pipeline leaks, the water can not pollute or damage the environment around the circulation pipeline or the ship body of the ship, and the safety is high. Of course, the flowing medium in the circulating pipeline can also be other solutions capable of realizing heat conduction and the like.

In this embodiment, circulating pump 2 passes through the pipeline with coil pipe 3 and links to each other to form circulation pipeline, coil pipe 3 can heat the sodium hydroxide solution in the alkali lye cabinet 1, makes the sodium hydroxide solution keep in suitable temperature range, avoids the sodium hydroxide solution temperature to cross excessively to take place the crystallization, influences the use. And can avoid the too high temperature of sodium hydroxide solution, lead to the corrosivity reinforcing, cause the corruption to alkali lye cabinet 1 and destroy, improve the security of alkali lye cabinet 1.

In addition, for with current heating system with sodium hydroxide solution through circulating line circulation heating, among the alkali lye cabinet heating system of this embodiment, sodium hydroxide solution need not to take place the contact with the pipeline in the circulating line, can avoid sodium hydroxide solution to cause the corruption to circulating line, has improved alkali lye cabinet heating system's security. In addition, the temperature difference of the sodium hydroxide solution in each part of the circulating pipeline can be avoided being overlarge, the actual temperature of the sodium hydroxide solution can be conveniently and accurately measured, and therefore the heating temperature of the sodium hydroxide solution can be adjusted.

Preferably, the circulation pump 2 has a plurality of circulation pumps 2 connected in parallel in the circulation line. When the circulation pipeline starts circulation, only one circulation pump 2 needs to be started. Other circulating pumps 2 are in a closed state and are used as standby pumps, so that the redundant design of the circulating pump 2 is realized, and the reliability of a circulating pipeline is improved.

The circulation pump 2 of the present embodiment has two. Of course, the number of the circulation pumps 2 may be three or more.

Due to the characteristics of expansion with heat and contraction with cold of water, in order to ensure that water smoothly flows in the circulating pipeline, as shown in fig. 1, the alkali liquor cabinet heating system further comprises an expansion cabinet 5, wherein the expansion cabinet 5 is positioned above the circulating pipeline, and the bottom end of the expansion cabinet 5 is communicated with the circulating pipeline so as to store the water in the circulating pipeline. The top end of the expansion cabinet 5 is arranged in an open mode, so that the circulating pipeline is communicated with the external atmospheric pressure. When water is heated and expanded, part of water can enter the expansion cabinet 5, and the overhigh water pressure in the circulating pipeline is avoided. When the water temperature decreases and the volume shrinks, the water in the expansion cabinet 5 enters the circulating pipeline again.

Meanwhile, the expansion cabinet 5 is communicated with an external water tank through a switch valve, and water can be supplemented into the circulating pipeline in time so as to supplement water volatilized or lost in the circulating pipeline and ensure the heating effect of the circulating pipeline.

As shown in figure 1, the heating system of the lye cabinet also comprises a first sensor 4, wherein the first sensor 4 is used for measuring the temperature of the lye in the lye cabinet 1 so as to monitor the actual temperature tank of the sodium hydroxide solution in real time and control the on/off of the circulating pump 2.

Specifically, when the temperature value measured by the first sensor 4 is lower than the first set value, the circulation pump 2 is turned on, and the water in the circulation pipeline starts to circulate. When the temperature value measured by the first sensor 4 is higher than the second set value, the circulation pump 2 is turned off, and the water in the circulation pipeline stops flowing. In order to avoid the frequent switching of circulating pump 2, realize circulating pump 2's accurate control, reduce the energy consumption.

The first set point for this example was 20 deg.C and the second set point was 30 deg.C. When the temperature of the sodium hydroxide solution in the alkali liquor cabinet 1 is between 20 ℃ and 30 ℃, the circulating pump 2 is started. Of course, the first set value and the second set value can be adaptively adjusted according to the actual heating requirement.

It should be noted that the coil pipes 3 are uniformly distributed at the bottom of the alkali solution cabinet 1 to realize uniform heating of the sodium hydroxide solution in the alkali solution cabinet 1, and avoid that the temperature difference in the alkali solution cabinet 1 is too large to affect the accuracy of temperature measurement.

The heating unit 6 of the present embodiment includes a heat exchanger 61, a steam system 62, and a steam line 63. The steam system 62 is used to generate high temperature steam and is in communication with the heat exchanger 61 via a steam line 63. A heat exchanger 61 is provided between the circulation pump 2 and the coil 3 to heat the circulation line. The heat of the steam is dissipated quickly, so that the water in the circulating pipeline passing through the heat exchanger 61 can be heated quickly, and the heating efficiency is improved.

In order to accurately control the temperature of the sodium hydroxide solution in the lye cabinet 1, the heating unit 6 further comprises a second sensor 64 and a first regulating valve 65. Wherein, the second sensor 64 is used for measuring the temperature of the alkali liquor (sodium hydroxide solution) in the alkali liquor cabinet 1. The first regulating valve 65 is installed in the steam line 63 in a communicating manner, is located between the heat exchanger 61 and the steam system 62, and can open or close the steam line 63. When the temperature value of the sodium hydroxide solution in the lye tank 1 measured by the second sensor 64 is lower than the third set value, the first regulating valve 65 opens the steam pipeline 63 to communicate the steam system 62 with the heat exchanger 61, thereby heating the water in the circulating pipeline.

It should be noted that the third setting value is between the first setting value and the second setting value to ensure that the circulation pump 2 is already turned on and the water in the circulation pipeline is in a circulation state when the heat exchanger 61 starts heating.

Specifically, the third set value of the present embodiment is 28 ℃. When the temperature value of the sodium hydroxide solution in the alkali lye cabinet 1 measured by the second sensor 64 is lower than 28 ℃, the circulating pump 2 is opened, the first regulating valve 65 is opened, the heat exchanger 61 heats the water in the circulating pipeline, and the sodium hydroxide solution in the alkali lye cabinet 1 is heated through the coil pipe 3. Along with the temperature rise of the sodium hydroxide solution in the alkali liquor cabinet 1, when the temperature value measured by the first sensor 4 is higher than 30 ℃, the circulating pump 2 is closed, the water in the circulating pipeline stops flowing, the heating intensity of the sodium hydroxide solution is reduced, and the alkali liquor cabinet 1 enters a heat preservation state. Namely, the sodium hydroxide solution in the alkali liquor cabinet 1 is kept in a stable temperature range, thereby avoiding strong corrosivity caused by overhigh temperature.

In order to avoid overheating of the sodium hydroxide solution in the lye cabinet 1, the heating unit 6 further comprises a third sensor 66 and a second regulating valve 67. A third sensor 66 is communicatively mounted in the circulation line for measuring the temperature of the water in the circulation line. The second regulating valve 67 is installed in communication with the steam line 63. When the temperature value measured by the third sensor 66 is higher than the fourth set value, the second regulating valve 67 regulates the opening of the steam line 63 to reduce the steam flow rate, thereby reducing the steam flow rate entering the heat exchanger 61 and reducing the heating intensity of the circulation line.

The fourth set value of the present embodiment is 48 c, and when the temperature value measured by the third sensor 66 is higher than 48 c, the second regulating valve 67 gradually decreases the opening degree, thereby reducing the steam flow until the steam line 63 is completely closed. The adjusting process of the second adjusting valve 67 can be adjusted according to the actual heating condition, and is not described herein again.

Since the present embodiment is heated by steam, the temperature of the steam passing through the heat exchanger 61 is lowered to cause condensation, and a large amount of condensed water is generated. As shown in fig. 1, the heating unit 6 further includes an automatic trap valve 69, and the heat exchanger 61 and the automatic trap valve 69 are sequentially installed on the steam line 63 in a flow direction of steam in the steam line 63 to drain condensed water in the steam line 63.

In addition, in order to ensure the cleanliness of the steam to protect the heat exchanger 61, the heating unit 6 further includes a steam filter 68, and the steam filter 68 and the heat exchanger 61 are installed on the steam line 63 in communication with each other in the flow direction of the steam in the steam line 63.

The boats and ships of this embodiment include foretell alkali lye cabinet heating system, can make the sodium hydroxide solution keep in suitable temperature range, avoid the sodium hydroxide solution temperature to hang down to take place the crystallization, influence the use. And can avoid the too high temperature of sodium hydroxide solution, lead to the corrosivity reinforcing, cause the corruption to the alkali lye cabinet 1 and destroy, improve the security of boats and ships.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.