CN220541432U - Special hot water unit for coking industry - Google Patents

Abstract

The utility model relates to the field of refrigeration units in the coking industry, in particular to a special hot water unit for the coking industry. It includes an evaporator, a first absorber, a second absorber, a condenser, a first generator and a second generator; the condenser is located above the first absorber and the second absorber; the condenser is provided with There is a cooling water inlet and two cooling water outlets, and the cooling water outlet is connected to the cooling water inlet on the first absorber and the second absorber respectively. After the cooling water flows out from the condenser, it flows into the first absorber and the second absorber in parallel. Absorber. It effectively distributes the heat exchange area of the upper and lower cylinders of the refrigeration unit, realizes the optimization of the heat exchange area, and reduces the actual investment and production cost of the unit.

Description

Special hot water unit for coking industry

Technical field

The utility model relates to the field of refrigeration units in the coking industry, in particular to a special hot water unit for the coking industry.

Background technique

At present, commercial refrigeration units are designed according to the cold water outlet temperature of 12/7°C, so the heat exchange area of the evaporator and absorber is large. At the same time, due to the high temperature of hot water in commercial air conditioners, the heat exchange area between the condenser and the generator is relatively small.

For coking conditions, the temperature of the raw gas is 85°C. In the first section of the primary cooler, the temperature of the raw gas is about 45°C after being cooled by the cooling water from the cooling tower, and the water temperature after heat exchange with the raw gas is 75°C. , this part of the heat energy can be provided to the lithium bromide hot water unit as a driving heat source. After being absorbed by the lithium bromide hot water unit, the heat source temperature is reduced to 68°C, and then cooled by the cooling tower and then replenished to a section of the primary cooler as cooling water.

The raw coal gas cooled by the first section of the primary cooler then passes through the second section of the primary cooler. At this time, it exchanges heat with the cooling water of the cooling tower to cool down the raw coal gas for a second time. In this stage, the 32/38°C cooling water from the cooling tower is directly used for heat exchange.

In the third section of the primary cooler, the raw gas exchanges heat with 16°C cold water, which is lower than the cooling water, and finally reduces the raw gas to 25°C. In this process, the heat source in the first section of the primary cooler is used as heat source water to supply the lithium bromide hot water unit drive, and the generated chilled water is used as the cooling water in the third section of the primary cooler.

Since the hot water temperature of the heat source generated in this process line is generally lower than 90°C, and the required temperature of cold water is 16°C, the heat exchange area required for the evaporator and absorber is small, while the area required for the generator and condenser is large. . If commercial air conditioners are directly used, it will cause unreasonable heat exchange area matching, which will ultimately lead to higher unit costs.

Utility model content

The purpose of this utility model is to overcome the above-mentioned defects of the existing technology and propose a special hot water unit for the coking industry, which effectively distributes the heat exchange areas of the upper and lower cylinders of the refrigeration unit and realizes the heat exchange area. Optimization reduces the actual input and production costs of the unit.

The technical solution of the utility model is: a special hot water unit for the coking industry, which includes an evaporator, a first absorber, a second absorber, a condenser, a first generator and a second generator;

The condenser is located above the first absorber and the second absorber;

The condenser is provided with a cooling water inlet and two cooling water outlets. The cooling water outlet is connected to the cooling water inlet of the first absorber and the second absorber respectively. After the cooling water flows out from the condenser, it flows into the third absorber in parallel. an absorber and a second absorber.

In the utility model, the evaporator is provided with a cold water inlet and a cold water outlet, and both ends of the heat exchange tube of the evaporator are connected to the cold water inlet and the cold water outlet respectively;

Steam channels are respectively connected between the evaporator and the first absorber, and between the evaporator and the second absorber.

The dilute solution outlet at the bottom of the first absorber is connected to the dripping device at the top of the first generator through a first connecting pipe;

The concentrated solution outlet at the bottom of the first generator is connected to the dripping device at the top of the first absorber through a second connecting pipe;

A first heat exchanger is provided between the first connecting pipe and the second connecting pipe.

The dilute solution outlet at the bottom of the second absorber is connected to the dripping device at the top of the second generator through a third connecting pipe;

The concentrated solution outlet at the bottom of the second generator is connected to the dripping device at the top of the second absorber through a fourth connecting pipe;

A second heat exchanger is provided between the third connecting pipe and the fourth connecting pipe.

Steam channels are respectively connected between the condenser and the first generator, and between the cold air and the second generator.

The first generator and the second generator are respectively provided with a heat source water outlet and a heat source inlet. The heat source water outlet of one generator is connected to the heat source water inlet of the other generator, and the heat source water flows into the first generator in turn. and within the second generator.

The beneficial effects of this utility model are:

(1) Under the current working conditions of the coking industry, the temperature of the water driving the heat source is usually relatively low and the temperature of the cold water is relatively high. This application can effectively improve the operating efficiency of the unit, reduce initial investment, achieve energy conservation and emission reduction, and support the dual-carbon policy;

(2) In this unit, the cooling water in the coking industry working conditions enters from the condenser, reducing the pressure of the upper cylinder, and the cooling water flows out from the two absorbers, increasing the pressure of the lower cylinder, thereby reducing the upper and lower cylinders of the refrigeration unit. The heat exchange area of the lower cylinder is distributed more effectively, which optimizes the heat exchange area and reduces the actual investment and production cost of the unit.

Description of drawings

Figure 1 is a schematic diagram of the connection structure of the present utility model.

In the figure: 1 evaporator; 2 first absorber I; 3 second absorber; 4 condenser; 5 first generator; 6 second generator I I; 7 first heat exchanger; 8 second heat exchanger ; 9 refrigerant pump; 10 second dilute solution pump; 11 first dilute solution pump; 12 first concentrated solution pump; 13 second concentrated solution pump; 14 liquid baffle; 15 dripping device.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation modes of the present invention will be described in detail below with reference to the accompanying drawings.

Specific details are set forth in the following description to facilitate a thorough understanding of the invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without violating the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

As shown in Figure 1, the utility model's special hot water unit for the coking industry includes an evaporator 1, a first absorber 2, a second absorber 3, a condenser 4, a first generator 5 and a second generator 6. , the condenser 4, the first generator 5, and the second generator 6 are located above the evaporator 1, the first absorber 2, and the second absorber 3. Liquid baffles 14 are provided in the steam channel between the condenser 4 and the first generator 5 and in the steam channel between the condenser 4 and the second generator 6 . Liquid baffles 14 are provided in the steam channel between the evaporator 1 and the first absorber 2 and in the steam channel between the evaporator 1 and the second absorber 3 .

A connecting pipeline is provided between the liquid outlet at the bottom of the evaporator 1 and the dripping device 15 at the top of the evaporator 1. A refrigerant pump 9 is provided on the connecting pipeline. The refrigerant pump 9 collects the cold water collected at the bottom of the evaporator 1. The agent water is pumped to the dripping device 15 on the top of the evaporator 1, and dripped onto the heat exchange tube of the evaporator 1 through the dripping device.

The evaporator 1 is provided with a cold water inlet and a cold water outlet. The two ends of the heat exchange tube of the evaporator 1 are connected to the cold water inlet and the cold water outlet respectively. After the cold water flows into the heat exchange tube, the refrigerant water on the surface of the heat exchange tube is absorbed into the heat exchange tube. The heat of the cold water, the refrigerant water absorbs heat and evaporates into refrigerant vapor. The refrigerant vapor enters the first absorber 2 and the second absorber 3 respectively through the vapor channels. At the same time, the temperature of the cold water in the heat exchange tube further decreases.

The bottom of the first absorber 2 is provided with a dilute solution outlet, and the dilute solution outlet is connected to the dripping device 15 on the top of the first generator 5 through a first connecting pipe. A first dilute solution pump 11 is provided on the first connecting pipeline. The dilute solution in the first absorber 2 is pumped into the first generator 5 through the first dilute solution pump 11 .

The bottom of the first generator 5 is provided with a concentrated solution outlet. The concentrated solution outlet is connected to the dripping device 15 on the top of the first absorber through a second connecting pipe. The concentrated solution is dripped on the surface of the heat exchange tube by the dripping device. . A first concentrated solution pump 12 is provided on the second connecting pipeline. The concentrated solution in the first generator 5 is pumped to the first absorber 2 through the second concentrated solution pump 12 .

A first heat exchanger 8 is provided between the first connecting pipe and the second connecting pipe. In the first heat exchanger 8, the dilute solution in the first connecting pipe absorbs the heat of the concentrated solution in the second connecting pipe, thereby increasing the temperature of the dilute solution and decreasing the temperature of the concentrated solution, recovering internal heat. Reduce external energy consumption.

The bottom of the second absorber 3 is provided with a dilute solution outlet, and its dilute solution outlet is connected to the dripping device 15 on the top of the second generator 6 through a third connecting pipe. A second dilute solution pump 10 is provided on the third connecting pipe. The dilute solution in the second absorber 3 is pumped to the second generator 6 through the second dilute solution pump 10 .

The bottom of the second generator 6 is provided with a concentrated solution outlet. The concentrated solution outlet is connected to the dripping device 15 on the top of the second absorber through a fourth connecting pipe. The concentrated solution is dripped on the surface of the heat exchange tube by the dripping device. . A second concentrated solution pump 13 is provided on the fourth connecting pipe. The concentrated solution in the second generator 6 is pumped to the second absorber 3 through the second concentrated solution pump 13 .

A second heat exchanger 7 is provided between the third connecting pipe and the fourth connecting pipe. In the second heat exchanger 7, the dilute solution in the third connecting pipe absorbs the heat of the concentrated solution in the fourth connecting pipe, thereby increasing the temperature of the dilute solution and decreasing the temperature of the concentrated solution, recovering internal heat. Reduce external energy consumption.

The first generator 5 and the second generator 6 are respectively provided with a heat source water inlet and a heat source water outlet. In this embodiment, the heat source water outlet of the second generator 6 is connected to the heat source water inlet of the first generator 5. The heat source water enters the second generator 6 and the first generator 5 in sequence.

After the dilute solution in the second absorber enters the second generator 6, the dilute solution absorbs the heat of the heat source water, and by heating the dilute solution, refrigerant vapor is emitted. Under the action of the pressure difference, the refrigerant vapor flows in through the steam channel. Inside the condenser 4. At the same time, the dilute solution is concentrated into a concentrated solution, and is pumped into the second absorber 3 by the second concentrated solution pump 13 . The temperature of the heat source water decreases, and the cooled heat source water continues to flow into the first generator 5 .

After the dilute solution in the first absorber enters the first generator 5, the dilute solution absorbs the heat of the heat source water, and by heating the dilute solution, refrigerant vapor is emitted. Under the action of the pressure difference, the refrigerant vapor flows in through the steam channel. Inside the condenser 4. At the same time, the dilute solution is concentrated into a concentrated solution, and is pumped into the first absorber 2 by the first concentrated solution pump 12 .

The condenser 4 is located above the first absorber 2 and the second absorber 3. The condenser 4 is provided with a cooling water inlet and two cooling water outlets. The first absorber 2 and the second absorber 3 are respectively provided with Cooling water inlet and cooling water outlet. The two cooling water outlets of the condenser 4 are connected to the cooling water inlets of the first absorber 2 and the second absorber 3 respectively.

After the cooling water enters the condenser 4, the cooling water absorbs the heat of the refrigerant steam entering the condenser 4, the temperature of the cooling water rises, and the heated refrigerant water flows into the first absorber 2 and the second absorber 3 in parallel Inside. At the same time, the refrigerant steam in the condenser 4 is cooled down and turned into refrigerant water. A refrigerant channel is provided between the condenser 4 and the evaporator 1, and the refrigerant water flows into the evaporator 1 through the refrigerant channel to realize the refrigerant circulation in the unit.

After the refrigerant vapor in the evaporator 1 flows into the first absorber 2 and the second absorber 3, the concentrated solution on the surface of the heat exchange tube absorbs the refrigerant vapor and its concentration decreases, becoming a dilute solution. The process of the concentrated solution absorbing the refrigerant Release heat. After the cooling water flows into the first absorber 2 and the second absorber 3 in parallel, it absorbs the latent heat of absorption in the first absorber 2 and the second absorber 3 respectively. The temperature of the cooling water continues to rise, and the heated cooling water respectively Outflow from the first absorber 2 and the second absorber 3. At the same time, the refrigerant vapor in the first absorber 2 and the second absorber 3 is cooled into refrigerant water.

In the first absorber 2 and the second absorber 3, after the refrigerant water and the concentrated solution are mixed, the concentrated solution is diluted into a dilute solution, thereby realizing the circulation of the solution in the unit.

During operation of the unit:

In the evaporator 1, the cold water from the user enters the inside of the heat exchange tube of the evaporator, heating the refrigerant water in the evaporator. The refrigerant water gets the heat and evaporates into refrigerant steam, which transfers the heat of the cold water to the evaporator. in the refrigerant vapor inside.

In the first absorber 2, the concentrated solution from the first generator 5 absorbs the refrigerant steam from the evaporator, and the concentration is reduced to become a dilute solution. At the same time, the steam is released to absorb latent heat, and the absorbed latent heat is taken out of the unit through the cooling water.

In the second absorber 3, the concentrated solution from the second generator 6 absorbs the refrigerant vapor from the evaporator, and the concentration is reduced to become a dilute solution. At the same time, the steam is released to absorb latent heat, and the absorbed latent heat is taken out of the unit through the cooling water.

The first generator 5 heats the dilute solution from the first absorber 2, flashes the solution, generates refrigerant vapor, and transfers the refrigerant vapor to the condenser 4 through the pressure difference.

The second generator 6 heats the dilute solution from the second absorber 3, flashes the solution, generates refrigerant vapor, and transfers the refrigerant vapor to the condenser 4 through the pressure difference.

The cooling water of the condenser 4 absorbs the heat of the refrigerant vapor generated by the first generator 5 and the first generator 6, the refrigerant vapor condenses into refrigerant water, and the refrigerant vapor is vaporized by the cooling water to remove the condensation Device 4. The condensed refrigerant water is transported to the evaporator 1 through the refrigerant pipeline to supplement the refrigerant consumed by the evaporator.

At the same time, hot water flows in the second generator 6 and the first generator 5 in sequence; after the cooling water flows out of the condenser, it flows into the first absorber 2 and the second absorber 3 in parallel; the cold water flows in the evaporator. flow in the heat exchange tube.

The above is a detailed introduction to the special hot water unit for the coking industry provided by the utility model. This article uses specific examples to illustrate the principles and implementation methods of the present utility model. The description of the above embodiments is only used to help understand the method and the core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection of the claims of the present utility model. within the range. The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A special hot water unit for the coking industry, characterized in that it includes an evaporator, a first absorber, a second absorber, a condenser, a first generator and a second generator; The condenser is located above the first absorber and the second absorber; The condenser is provided with a cooling water inlet and two cooling water outlets. The cooling water outlet is connected to the cooling water inlet of the first absorber and the second absorber respectively. After the cooling water flows out from the condenser, it flows into the third absorber in parallel. an absorber and a second absorber. 2. The special hot water unit for the coking industry according to claim 1, characterized in that, The evaporator is provided with a cold water inlet and a cold water outlet, and both ends of the heat exchange tube of the evaporator are connected to the cold water inlet and the cold water outlet respectively; Steam channels are respectively connected between the evaporator and the first absorber, and between the evaporator and the second absorber. 3. The special hot water unit for the coking industry according to claim 1, characterized in that, The dilute solution outlet at the bottom of the first absorber is connected to the dripping device at the top of the first generator through a first connecting pipe; The concentrated solution outlet at the bottom of the first generator is connected to the dripping device at the top of the first absorber through a second connecting pipe; A first heat exchanger is provided between the first connecting pipe and the second connecting pipe. 4. The special hot water unit for the coking industry according to claim 1, characterized in that, The dilute solution outlet at the bottom of the second absorber is connected to the dripping device at the top of the second generator through a third connecting pipe; The concentrated solution outlet at the bottom of the second generator is connected to the dripping device at the top of the second absorber through a fourth connecting pipe; A second heat exchanger is provided between the third connecting pipe and the fourth connecting pipe. 5. The special hot water unit for the coking industry according to claim 1, characterized in that, Steam channels are respectively connected between the condenser and the first generator and between the condenser and the second generator. 6. The special hot water unit for the coking industry according to claim 1, characterized in that, The first generator and the second generator are respectively provided with a heat source water outlet and a heat source inlet. The heat source water outlet of one generator is connected to the heat source water inlet of the other generator, and the heat source water flows into the first generator in turn. and within the second generator.