CN103864074B - Cold closed-type circulating cooling water system between furnace of calcium carbide - Google Patents

Abstract

A cold-closed circulating cooling water system between calcium carbide furnaces of the present invention includes a water supply mechanism, a distributor, a cooling mechanism, a water collector, a degassing tank, a pressure-stabilizing tank, a heat exchanger, a water replenishing mechanism and a dosing device, wherein The water supply mechanism includes a circulation pump group and an inlet circulation shut-off valve and an outlet circulation shut-off valve respectively. The cooling mechanism includes a calcium carbide furnace cooling element cooler and cooling shut-off valves respectively configured at the inlet and outlet. The inlet cooling shut-off valve and The outlet of the distributor is communicated, and the outlet cooling cut-off valve is communicated with the water collector, the outlet of the water collector is communicated with the degassing tank, the pressure stabilizing tank is connected with the degassing tank, and the heat exchanger is respectively communicated with The degassing tank and the pressure stabilizing tank, the water supply mechanism includes a water tank, a water supply pump group and the water supply pump group, a two-way cut-off valve for entering and exiting, the water supply mechanism communicates with the water supply mechanism through a pipeline, and the dosing device is installed in the The heat exchanger communicates with the water supply mechanism through a delivery pipe. This system has the advantages of small supplementary water, high heat transfer efficiency, good cooling effect, low corrosion rate, good degassing and exhaust effect, safety and energy saving And the good effect of environmental protection.

Description

Cold closed circulating cooling water system between calcium carbide furnaces

technical field

The invention relates to an environment-friendly and energy-saving water device, in particular to a cold-closed circulating cooling water system between calcium carbide furnaces.

Background technique

The characteristic of calcium carbide production is that the production link is inseparable from water. The calcium carbide furnace is a device that converts electrical energy into heat energy, which determines that it operates at a high temperature all the time. In order to ensure the long-term safe operation of the calcium carbide furnace, the various systems of the equipment must be cooled. Because the cooling water system operates under high temperature conditions for a long time, it is easy to generate scale, which leads to low heat transfer efficiency of the pipeline and cooling components. Therefore, the cooling water system of the calcium carbide furnace requires better water quality. At the same time, calcium carbide production is prone to safety accidents when it encounters water, which also puts forward extremely high requirements for water system leak detection.

At present, the commonly used cooling water systems for calcium carbide furnaces in China include an intercooled open circulating cooling water system and an intercooled closed circulating cooling water system. However, the intercooled open circulating cooling water system is not only a serious waste of water resources, but also high energy consumption. A large amount of impurities enter the water body, making the water quality of the system poor, causing hard scale and dirt to deposit in the equipment and pipelines, resulting in unsatisfactory cooling effect. However, the existing circulating cooling water system mainly has the following problems: first, there are no voltage stabilization and leak detection facilities, the water system pressure fluctuates greatly and leakage problems cannot be detected in time and accurately, and the safe production of the calcium carbide furnace cannot be guaranteed; the second is cooling The outlet branch pipe of the element is arranged lower than or parallel to the water inlet branch pipe, forming an inverted U-shaped arrangement, which makes the cooling element form an air lock and reduces the heat exchange efficiency of the cooling element; the third is that the degassing tank is not designed at the height of the water system, which cannot be effectively Fourth, the system does not have a clear water replenishment signal, and it is impossible to judge whether the system needs to replenish water; fifth, the system uses ammonia to adjust the PH value, which cannot effectively solve the erosion and scaling problems of the piping system and cooling elements .

Contents of the invention

In order to solve the above-mentioned technical problems, the main purpose of the present invention is to provide a cold-closed circulating cooling water system between calcium carbide furnaces, which can quickly and efficiently detect leakage conditions, discharge gas generated during system operation in a timely manner, and have reliable and stable configuration. The automatic water replenishment system, and the water quality is stabilized through the dosing device.

In order to achieve the above object, the technical solution of the present invention is: a cold-closed circulating cooling water system between calcium carbide furnaces, including a water supply mechanism, a calcium carbide furnace cooling mechanism, a heat exchanger, a water replenishment mechanism and a dosing device, wherein: the calcium carbide furnace The furnace cooling mechanism has a distributor, a cooling mechanism and a water collector. The degassing and stabilizing mechanism has a degassing tank and a stabilizing tank. The circulation cut-off valve communicates with the conveying pipe, and the outlet circulation cut-off valve communicates with the inlet of the distributor. The outlet cooling cut-off valve communicates with the water collector, the outlet of the water collector communicates with the degassing tank, the surge tank connects with the degassing tank, and the heat exchanger communicates with the degassing tank respectively. Tank and surge tank, the water supplement mechanism communicates with the water supply mechanism through pipelines, the dosing device is installed between the heat exchanger and the water supply mechanism, and communicates with it through the delivery pipe, so that the system is in operation The water quality in the closed circulation process is not polluted by the outside world.

In this embodiment, preferably, the surge tank stabilizes the system pressure, replenishes water through the liquid level signal control system in the tank, and performs system leak detection at the same time.

Preferably in this embodiment, the dosing device maintains stable water quality.

In this embodiment, preferably, the cold-closed circulating cooling water system between calcium carbide furnaces further includes a water supply mechanism.

In this embodiment, preferably, the water replenishment mechanism includes a water tank, a water replenishment pump group, and water replenishment cut-off valves respectively arranged at inlets and outlets of the water replenishment pump group.

In this embodiment, preferably, the inlet water replenishment cut-off valve is divided into two groups and communicated with the water tank respectively, and the outlet water replenishment cut-off valve is also divided into two groups and communicated with the delivery pipe through a three-way pipe.

In this embodiment, preferably, the inlet circulation cut-off valves are in two groups and communicated with the delivery pipe through a three-way pipe; the outlet circulation cut-off valves are also in two groups and communicated with the distributor through a three-way pipe.

In this embodiment, preferably, the inlet cooling cut-off valves are in three groups, and the distributor and the cooler are connected in parallel, and the outlet cooling cut-off valves are also in three groups, and the cooler and the cooler are connected in parallel. The water collector is connected.

In this embodiment, preferably, the cooler has a distributor, a cooling element and a water collector, and also includes a water outlet branch pipe and a water inlet branch pipe, and the water outlet branch pipe is arranged higher than the water inlet branch pipe.

In this embodiment, preferably, the degassing tank is set at a position higher than the water collector.

The present invention compares with prior art, and its beneficial effect is:

It provides stable and safe cooling water for the calcium carbide furnace, and also has the advantages of small supplementary water, high heat transfer efficiency, good cooling effect, low corrosion rate, good degassing and exhaust effect, etc., achieving good effects of environmental protection, energy saving and water saving.

Description of drawings

Fig. 1 is a system structure diagram of the present invention, wherein:

The name and label of the main structure are water supply mechanism 10, circulating pump group 11, cut-off valve 12; distributor 20, cooling mechanism 30, cooler 31, cut-off valve 32; water collector 40; degassing tank 50; surge tank 60; Heat exchanger 70; dosing device 80; water supply mechanism 90, water tank 91, water pump unit 92, cut-off valve 93.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Please refer to Fig. 1, the cold-closed circulating cooling water system between calcium carbide furnaces of the present invention includes a water supply mechanism 10, a calcium carbide furnace cooling mechanism, a degassing and pressure stabilizing mechanism, a heat exchanger 70, a dosing device 80 and a water replenishing mechanism 90 ,in:

The water supply mechanism 10 includes a shut-off valve 12 respectively arranged in both directions of the inlet and outlet of the circulation pump group 11, the inlet end shut-off valve 12 communicates with the delivery pipe (not marked), the outlet shut-off valve 12 communicates with the inlet of the distributor 20, and In the embodiment of the present invention, the water supply mechanism 10 is composed of two sets of input shut-off valves 12, circulating pumps 11 and output shut-off valves 12, wherein each set of input shut-off valves 12 communicates with the delivery valve through a three-way pipe (not marked) The pipe is connected, and each group of output cut-off valves 12 is connected with the distributor 20 through a three-way pipe (not marked);

The calcium carbide furnace cooling mechanism includes a distributor 20, a cooling mechanism 30 and a water collector 40, wherein: the cooling mechanism 30 includes a cut-off valve 32 configured at both ends of the cooling element 31, wherein: the opposite input cut-off valve 32 is connected to the distributor 20 The outlet is connected, and the opposite output shut-off valve 32 is communicated with the water collector 40. In the embodiment of the present invention, the input shut-off valve 32 is in three groups, and the distributor 20 and the cooling element are connected in parallel. 31 connected, and the output cut-off valve 32 is also three groups, and the cooling element 31 and the water collector 40 are also connected in parallel; in an embodiment of the present invention, the cooling element 31 also includes a water outlet branch pipe And the water inlet pipe, the water outlet branch pipe is arranged higher than the water inlet branch pipe, forming a situation of going in and out at the bottom, thereby preventing the cooling element 31 from generating air locks and reducing the heat exchange effect of the cooling mechanism 30; the water collector 40 and the water collector The cooling mechanism 30 is connected, and the output item provided with it is connected with the input item of the degassing tank 50;

The degassing and stabilizing mechanism includes a degassing tank 50 and a pressure stabilizing tank 60, wherein: the degassing tank 50 is set at a position higher than the water collector 40, so that the gas generated by the system operation can be discharged in time to ensure The closed circulating water system operates stably; the surge tank 60 is connected to the degassing tank 50, which can quickly detect the leakage of liquid level information;

The heat exchanger 70 communicates with the degassing tank 50 and the surge tank 60 respectively through pipelines, and simultaneously detects system leakage;

The dosing device 80 is installed between the heat exchanger 70 and the water supply mechanism 10, and communicates with it through a delivery pipe, and maintains the water quality of the system by adding corrosion and scale inhibitors during use;

The water replenishment mechanism 90 includes a water tank 91, a water replenishment pump group 92, and a cut-off valve 93 respectively arranged in both directions of the inlet and outlet of the water replenishment pump group 92. The cut-off valve 93 is divided into two groups, each group of input cut-off valve 93 is connected to the water tank 91, and the output cut-off valve 93 is connected to the delivery pipe through a three-way pipe (not marked); Water replenishment is performed when the water level of the tank 60 is lower than the upper limit value, and water replenishment is stopped when the water level is higher than the upper limit value, which can realize reliable and stable automatic water replenishment of the system.

In order to make it understandable, the applicable process of this equipment is briefly described below:

The cold-closed circulating cooling water system between calcium carbide furnaces of the present invention is set to start from the water supply mechanism 10, and its desalted water (soft water) enters the distributor 20 through the delivery pipe (not marked), and passes through the serpentine cooling branch pipe of the cooler 30 Enter the water collector 40, then, the return water enters the high-level degassing tank 50 through the delivery pipe (not marked) for degassing, and then enters the heat exchanger 70 through the pipe (not marked), and is provided to the water supply mechanism 10 for circulation after cooling use. Simultaneously, this equipment is provided with replenishment mechanism 90, when the system water volume is lower than the low limit of the water level of the surge tank 60, the water replenishment is carried out through the delivery pipe (not marked), and the replenishment is stopped when the water level is higher than the upper limit of the water level. Simultaneously, the system is also provided with a dosing device 80 to deliver medicinal liquid regularly to maintain the water quality stability of the closed circulation water system.

In summary, it is only a preferred embodiment of the present invention, and does not limit the protection scope of the present invention. All equivalent changes and modifications made according to the scope of the patent of the present invention and the content of the specification are all covered by the patent of the present invention. within.

Claims (5)

1. A cold-closed circulating cooling water system between calcium carbide furnaces, comprising a water supply mechanism, a calcium carbide furnace cooling mechanism, a degassing and voltage stabilizing mechanism, a heat exchanger, a water replenishment mechanism and a dosing device, characterized in that: the calcium carbide furnace cooling mechanism It has a distributor, a cooling mechanism and a water collector. The degassing and pressure stabilizing mechanism has a degassing tank and a pressure stabilizing tank. The water supply mechanism includes a circulating pump group and a circulation shut-off valve with its inlet and outlet respectively. The inlet circulation shut-off valve It communicates with the delivery pipe, and the outlet circulation cut-off valve is connected with the inlet of the distributor, wherein the inlet circulation cut-off valve is in two groups and communicated with the delivery pipe through a three-way pipe; the outlet circulation cut-off valve is also in two groups and passed through The three-way pipe communicates with the distributor; the cooling mechanism includes a cooler and cooling cut-off valves respectively configured at its inlet and outlet, the inlet cooling cut-off valve communicates with the distributor outlet, and the outlet cooling cut-off valve communicates with the water collecting The inlet cooling cut-off valves are in three groups, and the distributor and the cooler are connected in parallel, and the outlet cooling cut-off valves are also in three groups, and the cooler and the set are also connected in parallel. The outlet of the water collector is connected to the degassing tank, the surge tank is connected to the degassing tank, the heat exchanger is respectively connected to the degassing tank and the surge tank, and the water supply mechanism passes through the pipeline It is connected with the water supply mechanism and includes a water tank, a supplementary water pump group, and a supplementary water shut-off valve respectively configured at the inlet and outlet of the supplementary water pump unit. The two groups are communicated with the conveying pipe through a three-way pipe, and the dosing device is installed between the heat exchanger and the water supply mechanism, and communicated with it through a conveying pipe, so that the system is in the The water quality of the closed circulation is not polluted by the outside world. 2. The cold-closed circulating cooling water system between calcium carbide furnaces as claimed in claim 1, characterized in that: the surge tank stabilizes the system pressure, the system replenishes water through the liquid level signal control system in the tank, and simultaneously performs system leak detection. 3. The cold-closed circulating cooling water system between calcium carbide furnaces as claimed in claim 2, wherein the dosing device maintains stable water quality. 4. The cold-closed circulating cooling water system between calcium carbide furnaces as claimed in claim 3, characterized in that: the cooler has a distributor and a cooling element, and also includes an outlet branch pipe and an inlet branch pipe, and the outlet branch pipe is arranged higher than the inlet branch pipe. water pipe. 5. The cold-closed circulating cooling water system between calcium carbide furnaces as claimed in claim 4, characterized in that: the degassing tank is set at a position higher than the water collector.