阅读说明：本技术 一种内浮顶储罐外循环冷却方法 (External circulation cooling method for internal floating roof storage tank ) 是由 胡立宇 朱振中 吕豪 李玉铃 于 2021-08-20 设计创作，主要内容包括：本发明涉及内浮顶储罐冷却技术领域,尤其是一种内浮顶储罐外循环冷却方法,包括以下步骤：将物料放至内浮顶储罐内,启动外循环泵将内浮顶储罐内的物料抽出送至外循环冷却器中,物料经外循环冷却器中的冷冻水冷却后,回流至内浮顶储罐；启动冷冻机,冷冻机为外循环冷却器循环提供冷冻水；内浮顶储罐内设有浮动出油装置,回流至内浮顶储罐的冷却物料由浮动出油装置送至浮顶储罐的内部上方位置,在重力作用下,冷物料向下方运动,再经物料出口抽出,形成循环,同时内浮顶储罐内冷热物料在扩散作用下,均匀混合,从而使得罐内所有物料整体冷却,本申请内浮顶储罐的使用寿命较长,减少改造工作量,使得内浮顶储罐内部物料均匀混合、冷却。(The invention relates to the technical field of cooling of an inner floating roof storage tank, in particular to an outer circulation cooling method of the inner floating roof storage tank, which comprises the following steps: putting the materials into an inner floating roof storage tank, starting an outer circulating pump to pump out the materials in the inner floating roof storage tank and sending the materials to an outer circulating cooler, cooling the materials by using the chilled water in the outer circulating cooler, and then refluxing the materials to the inner floating roof storage tank; starting a refrigerator, wherein the refrigerator provides chilled water for the circulation of the external circulation cooler; be equipped with unsteady oil extraction device in the interior floating roof storage tank, the cooling material that flows back to interior floating roof storage tank is delivered to the inside top position of floating roof storage tank by unsteady oil extraction device, under the action of gravity, cold material moves downwards, take out through the material export again, form the circulation, cold and hot material is under the diffusion in the interior floating roof storage tank simultaneously, the homogeneous mixing, thereby make all material whole cooling in the jar, the life of floating roof storage tank is longer in this application, reduce and reform transform work load, make the inside material homogeneous mixing of interior floating roof storage tank, the cooling.)

1. An external circulation cooling method for an internal floating roof storage tank comprises the following steps:

putting the materials into the inner floating roof storage tank (10), starting the outer circulating pump (20) to pump out the materials in the inner floating roof storage tank (10) and sending the materials into the outer circulating cooler (30), cooling the materials by the freezing water in the outer circulating cooler (30), and then refluxing the materials to the inner floating roof storage tank (10);

starting a refrigerator, wherein the refrigerator provides chilled water for the circulation of the external circulation cooler (30);

be equipped with unsteady oil extraction device (40) in interior floating roof storage tank (10), the cooling material that flows back to interior floating roof storage tank (10) is delivered to the inside top position of floating roof storage tank (10) by floating oil extraction device (40), the cold material of top and the interior middle and lower part hot material formation temperature gradient of interior floating roof storage tank (10), under the action of gravity, the cold material moves downwards, take out through the material export again, form the circulation, cold and hot material is under the diffusion in interior floating roof storage tank (10), the homogeneous mixing, thereby make the whole cooling of all materials in the jar.

2. The external circulation cooling method for the internal floating roof tank as claimed in claim 1, wherein: the inner floating roof storage tank (10) is provided with a first thermometer for measuring the temperature of materials in the inner floating roof storage tank, and when the temperature measured by the first thermometer in the inner floating roof storage tank (10) is reduced, the frequency conversion of the outer circulating pump (20) is reduced, so that the outer circulating amount of the materials is reduced; when the temperature in the inner floating roof storage tank (10) is measured to be increased by the thermometer I, the frequency conversion of the outer circulating pump (20) is improved, and the outer circulating amount of materials is increased.

3. The external circulation cooling method for the internal floating roof tank as claimed in claim 2, wherein: a second thermometer is arranged on a return pipeline from the external circulation cooler (30) to the internal floating roof storage tank (10), an adjusting valve (50) is arranged on a water outlet pipeline of the refrigerating machine, and when the temperature of the return pipeline needs to be controlled to be reduced, the adjusting valve (50) is opened to increase the amount of the refrigerating water; when the temperature of the return pipeline needs to be controlled to rise, the regulating valve (50) is closed, and the amount of the frozen water is reduced.

4. The external circulation cooling method for the internal floating roof tank as claimed in claim 1, wherein: before adding new materials into the inner floating roof storage tank (10), the new materials are pumped into the outer circulation cooler (30) by the unloading pump to be cooled and then are sent into the inner floating roof storage tank (10).

Technical Field

The invention relates to the technical field of cooling of an inner floating roof storage tank, in particular to an outer circulation cooling method of the inner floating roof storage tank.

Background

With the increasing environmental protection requirement, the storage armor is subjected to the requirements of SH/T3007, GB50160 and other standards_BB, B_AStorage tanks for flammable liquids generally require the use of an internal floating roof tank. For some special materials (such as styrene and the like), low-temperature storage is usually required due to the particularity of the materials, cooling water or chilled water is generally adopted for cooling, and the storage temperature is controlled to be 10-20 ℃.

The mode that carries out the cooling to the internal floating roof jar at present has two kinds usually:

the other is a mode of spraying outside the storage tank, namely, a spraying pipe is arranged on the outer wall of the storage tank, and cooling water is used for spraying and cooling. The disadvantages of this approach are: 1. the temperature of the material cannot meet the requirement due to the influence of the environmental temperature, and particularly in summer, the material temperature can only be controlled to be 20-30 ℃; 2. the outer wall of the storage tank is sprayed with water, so that the storage tank is corroded, and the service life of the storage tank is shortened; 3. the spray cooling water is recycled, and because the spray cooling water is exposed in the air of a chemical environment, the cooling water adsorbs surrounding organic matters to cause pollution, thereby increasing the sewage discharge and increasing the environmental protection cost.

The other is that an inner coil is arranged in the storage tank and cooling water is adopted for circulating cooling. The disadvantages are that: 1. the cooling coil is arranged at the bottom of the storage tank, so that the cooled materials are deposited at the bottom of the storage tank, the temperature diffusion in the storage tank cannot be caused because the cold materials usually sink, and the materials at the middle upper part of the storage tank cannot be cooled; 2. coil pipe in the storage tank setting needs to carry out clear jar transformation to current storage tank, relates to a series of problems such as safety, environmental protection, production.

Disclosure of Invention

The applicant provides an external circulation cooling method for an inner floating roof storage tank aiming at the defects in the prior art, so that the service life of the inner floating roof storage tank is longer, the workload of transformation is reduced, and the materials in the inner floating roof storage tank are uniformly mixed and cooled.

The technical scheme adopted by the invention is as follows: an external circulation cooling method for an internal floating roof storage tank comprises the following steps:

putting the materials into an inner floating roof storage tank, starting an outer circulating pump to pump out the materials in the inner floating roof storage tank and sending the materials to an outer circulating cooler, cooling the materials by using the chilled water in the outer circulating cooler, and then refluxing the materials to the inner floating roof storage tank;

starting a refrigerator, wherein the refrigerator provides chilled water for the circulation of the external circulation cooler;

the floating oil outlet device is arranged in the inner floating roof storage tank, the cooling material flowing back to the inner floating roof storage tank is conveyed to the position above the inner part of the floating roof storage tank through the floating oil outlet device, the cold material above the floating roof storage tank and the hot material at the middle part and the lower part in the inner floating roof storage tank form a temperature gradient, the cold material moves downwards under the action of gravity and is drawn out through a material outlet to form circulation, and meanwhile, the cold material and the hot material in the inner floating roof storage tank are uniformly mixed under the diffusion action, so that all the materials in the tank are integrally cooled.

As a further improvement of the above technical solution:

the inner floating roof storage tank is provided with a first thermometer for measuring the temperature of materials in the inner floating roof storage tank, and when the temperature in the inner floating roof storage tank is reduced by the first thermometer, the frequency conversion of the outer circulating pump is reduced, and the outer circulating amount of the materials is reduced; when the temperature in the inner floating roof storage tank is measured by the first thermometer, the frequency conversion of the outer circulating pump is improved, and the outer circulating amount of the materials is increased.

A second thermometer is arranged on a return pipeline from the external circulation cooler to the internal floating roof storage tank, a regulating valve is arranged on a water outlet pipeline of the refrigerator, and when the temperature of the return pipeline needs to be controlled to be reduced, the regulating valve is opened to increase the amount of the frozen water; when the temperature of the return pipeline needs to be controlled to rise, the regulating valve is closed, and the amount of the frozen water is reduced.

Before adding new materials into the inner floating roof storage tank, the new materials are pumped into the outer circulation cooler by the unloading pump to be cooled and then are sent into the inner floating roof storage tank.

The invention has the following beneficial effects: this application adopts extrinsic cycle cooling water to cool off the material, avoids setting up interior coil pipe in the floating roof storage tank including, has reduced the transformation work load to the safety risk when interior coil pipe leaks has been reduced. The outer circulation system that this application adopted is sealing system, rather than the open system that the jar outside sprayed, has avoided corruption and the environmental protection problem that produces from this for the life of interior floating roof storage tank is longer. This application adopts the oily device that floats, and the discharge gate of the oily device that floats is above the material liquid level in the floating roof storage tank including, guarantees promptly that the backward flow material remains the feeding above the liquid level all the time to make the low temperature material from top to bottom diffusion, form the temperature gradient that can automatic cycle in the jar, make the material homogeneous mixing in the whole jar, cool off.

Drawings

FIG. 1 is a flow chart of the present invention.

Wherein: 10. an inner floating roof tank; 20. an external circulation pump; 30. an external circulation cooler; 40. a floating oil outlet device; 50. and adjusting the valve.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the external circulation cooling method for the internal floating roof storage tank of the present embodiment includes the following steps:

putting the materials into the inner floating roof storage tank 10, starting the outer circulating pump 20 to pump the materials in the inner floating roof storage tank 10 out and send the materials into the outer circulating cooler 30, cooling the materials by the chilled water in the outer circulating cooler 30, and then refluxing the materials to the inner floating roof storage tank 10;

starting the refrigerator, wherein the refrigerator provides chilled water for the circulation of the external circulation cooler 30;

be equipped with unsteady oil extraction device 40 in the interior floating roof storage tank 10, the cooling material that flows back to interior floating roof storage tank 10 is delivered to the inside top position of floating roof storage tank 10 by unsteady oil extraction device 40, the cold material of top forms temperature gradient with the hot material of middle and lower part in the interior floating roof storage tank 10, under the action of gravity, the cold material moves downwards, take out through the material export again, form the circulation, simultaneously the cold and hot material is under the diffusion in the interior floating roof storage tank 10, homogeneous mixing, thereby make all material integral cooling in the jar.

The inner floating roof storage tank 10 is provided with a first thermometer for measuring the temperature of the materials in the inner floating roof storage tank, and when the temperature in the inner floating roof storage tank 10 is measured to be reduced by the first thermometer, the frequency conversion of the outer circulating pump 20 is reduced, and the outer circulating amount of the materials is reduced; when the temperature in the inner floating roof storage tank 10 is measured to rise by the thermometer, the frequency conversion of the outer circulating pump 20 is improved, and the outer circulating amount of the materials is increased. Through the frequency conversion regulation of outer circulating pump 20, when guaranteeing the tank interior temperature, reduce the power consumption, practice thrift the electric energy.

A second thermometer is arranged on a return pipeline from the external circulation cooler 30 to the internal floating roof storage tank 10, an adjusting valve 50 is arranged on a water outlet pipeline of the refrigerating machine, and when the temperature of the return pipeline needs to be controlled to be reduced, the adjusting valve 50 is opened greatly to improve the amount of the refrigerating water; when the temperature of the return line needs to be controlled to rise, the regulating valve 50 is closed to reduce the amount of the frozen water. Through the flow regulation of the chilled water, the reflux temperature is ensured to be controlled, and meanwhile, the circulation quantity of the chilled water is reduced, so that the refrigeration load of the refrigerator is reduced, and the purpose of saving energy is achieved.

Before adding new materials into the inner floating roof storage tank 10, the new materials are pumped into the outer circulation cooler 30 by the unloading pump to be cooled and then are sent into the inner floating roof storage tank 10. The temperature change of the materials in the inner floating roof storage tank 10 caused by the overhigh temperature of the new materials is avoided.

This application adopts extrinsic cycle cooling water to cool off the material, avoids setting up interior coil pipe in floating roof storage tank 10 including, has reduced the transformation work load to the safety risk when interior coil pipe leaks has been reduced.

The outer circulation system that this application adopted is sealing system, rather than the open system that the jar outside sprayed, has avoided the corruption and the environmental protection problem that produce from this for the life of interior floating roof storage tank 10 is longer.

The outer circulation material backflow feeding mode of the application adopts the floating oil outlet device 40, and the problem that the upper portion opening of the storage tank cannot be fed in due to the floating roof of the inner floating roof storage tank 10 is solved.

This application adopts unsteady oil outlet device 40, floats including oil outlet device 40's discharge gate and floats top storage tank 10 interior material liquid level top, guarantees promptly that the backward flow material remains the feeding above the liquid level all the time to make the low temperature material from top to bottom diffusion, form the temperature gradient that can automatic cycle in jar, make the material homogeneous mixing in the whole jar, cool off.

This application combines thermometer one and thermometer two, reaches the dual purpose of temperature control and energy saving.

The above description is intended to be illustrative and not restrictive, and the scope of the invention is defined by the appended claims, which may be modified in any manner within the scope of the invention.