Circulating water secondary utilization device for liquefaction factory

Abstract

The utility model relates to a circulating water secondary utilization device, in particular to a circulating water secondary utilization device for a liquefaction factory, which comprises a heat source, a cold source arranged on one side of the heat source, a water conveying pipe connected with one end of the heat source, and a circulating pump arranged on the water conveying pipe, the other end of the water conveying pipe is connected with a plurality of water conveying section pipes which are connected in series. The other end of the water inlet pipe is connected with a cold source, the other end of the cold source is connected with a water outlet pipe, the other end of the water outlet pipe is connected with a plurality of cooling pipelines, the cooling pipelines are connected in series, the other ends of the cooling pipelines are connected with a water return pipe, and the other end of the water return pipe is connected with a heat source. The water source of the heat source is introduced into the cold source through the water delivery pipe, the water delivery joint pipe and the water inlet pipe, and then the water source is introduced into the heat source from the cold source through the water outlet pipe, the cooling pipeline and the water return pipe, so that the cold source exchanges heat with the heat source, and the energy consumption of the heat source and the cold source is further reduced.

Description

Technical Field

[0001] The utility model relates to a circulating water secondary utilization device, in particular to a circulating water secondary utilization device for a liquefaction plant. Background Art

[0002] As the main natural gas supply station in the urban area, the pressure regulating station delivers about 1.5 million cubic meters of natural gas to the urban medium-pressure and sub-high-pressure pipelines every day. The station receives high-pressure natural gas at a pressure of 3.5-4.0MPa, regulates the pressure to 1.25 MPa once, and partially delivers it to the sub-high-pressure pipeline network. It then regulates the pressure to 0.36MPa for the second time and delivers it to the urban medium-pressure pipeline network. To ensure that the natural gas outlet temperature is not lower than 5°C, three natural gas hot water boilers are installed in the station to heat the high-pressure natural gas. It consumes about 230,000 cubic meters of fuel gas each year, and has a large heat load demand. The pressure energy liquefaction plant has been built and put into operation, adjacent to the pressure regulating station. The liquefaction plant uses a closed-loop cooling water system to cool the on-site production equipment, and has a cold load demand. Utility Model Content

[0003] The main purpose of the utility model is to provide a circulating water secondary utilization device for a liquefaction plant, so as to solve the problem in the related art that the heat load demand of the pressure regulating station is large and the liquefaction plant has a cold load demand.

[0004] In order to achieve the above-mentioned object, according to one aspect of the utility model, a circulating water secondary utilization device for a liquefaction plant is provided, comprising a heat source, a cold source is arranged on one side of the heat source, one end of the heat source is connected to a water delivery pipe, and further comprising:

[0005] A circulation pump is arranged on a water delivery pipe, the other end of the water delivery pipe is connected to a water delivery joint pipe, several of the water delivery joint pipes are connected in series, the other ends of several of the water delivery joint pipes connected in series are connected to a water inlet pipe, the other end of the water inlet pipe is connected to a cold source, the other end of the cold source is connected to a water outlet pipe, the other end of the water outlet pipe is connected to several cooling pipelines, several of the cooling pipelines are connected in series, the other ends of several of the cooling pipelines connected in series are connected to a return pipe, the other end of the return pipe is connected to a heat source, and is used to perform heat exchange between the heat source and the cold source through circulating water.

[0006] Furthermore, a water delivery valve is provided on the water delivery pipe, and the water delivery valve is arranged between the circulation pump and the heat source.

[0007] Furthermore, a water shut-off valve is provided at the end of some of the water delivery joint pipes, and a pressure gauge is provided at the other end of the water shut-off valve.

[0008] Furthermore, a water shut-off valve and a pressure gauge are connected between the cooling pipelines, and the cooling pipeline includes a plurality of cooling branches.

[0009] Furthermore, a flow meter is connected to the water return pipe, and a safety valve is provided between the flow meter and the heat source.

[0010] Furthermore, a flow meter is connected to the water inlet pipe, and a safety valve is provided between the flow meter and the cold source.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In the circulating water secondary utilization device for a liquefied chemical plant, water from the heat source is passed into the cold source through a water delivery pipe, a water delivery joint pipe and a water inlet pipe, and then water is passed from the cold source into the heat source through a water outlet pipe, a cooling pipeline and a return pipe, so that heat exchange is performed between the cold source and the heat source, further reducing the energy consumption of the heat source and the cold source. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the secondary utilization device of circulating water for liquefaction plants;

[0014] Illustration: 1. Heat source; 101. Water supply valve; 102. Circulation pump; 103. Water supply pipe; 104. Water supply junction pipe; 1041. Water shut-off valve; 1042. Pressure gauge; 2. Cold source; 201. Water outlet pipe; 202. Cooling pipeline; 2021. Cooling branch pipe; 203. Return pipe; 3. Safety valve; 301. Flow meter. DETAILED DESCRIPTION

[0015] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0016] See also Figure 1 As shown, the purpose of this embodiment is to provide a circulating water secondary utilization device for a liquefaction plant, including a heat source 1, a cold source 2 is arranged on one side of the heat source 1, and a water pipe 103 is connected to one end of the heat source 1, and also includes:

[0017] A circulation pump 102 is arranged on a water delivery pipe 103, the other end of the water delivery pipe 103 is connected to a water delivery joint pipe 104, a plurality of water delivery joint pipes 104 are connected in series, the other ends of the plurality of series-connected water delivery joint pipes 104 are connected to a water inlet pipe 105, the other end of the water inlet pipe 105 is connected to a cold source 2, the other end of the cold source 2 is connected to a water outlet pipe 201, the other end of the water outlet pipe 201 is connected to a plurality of cooling pipelines 202, a plurality of cooling pipelines 202 are connected in series, the other ends of the plurality of series-connected cooling pipelines 202 are connected to a return pipe 203, the other end of the return pipe 203 is connected to a heat source 1, and is used to perform heat exchange between the heat source 1 and the cold source 2 through circulating water.

[0018] The water delivery pipe 103 is provided with a water delivery valve 101 , which is arranged between the circulation pump 102 and the heat source 1 . After the water delivery valve 101 is opened, the circulating water in the heat source 1 will be discharged from the water delivery pipe 103 through the circulation pump 102 .

[0019] A water shut-off valve 1041 is provided at the end of several water supply joint pipes 104, and a pressure gauge 1042 is provided at the other end of the water shut-off valve 1041. In order to prevent the pipeline from leaking and being unable to confirm the leakage source, the water shut-off valve 1041 is closed and the value of the pressure gauge 1042 is observed. If the pressure value decreases or fluctuates slightly, it means that the section of the water supply joint pipe 104 is leaking, which is used to detect pipeline leakage.

[0020] A water shut-off valve 1041 and a pressure gauge 1042 are connected between the cooling pipelines 202. The cooling pipelines 202 include a plurality of cooling branches 2021. The circulating water derived from the cold source 2 is distributed from the water outlet pipe 201 to the plurality of cooling branches 2021, thereby increasing the contact area between the circulating water and the outside world, further improving the cooling effect of the circulating water, and further improving the cooling effect of the circulating water entering the heat source 1.

[0021] A flow meter 301 is connected to the return pipe 203, a safety valve 3 is arranged between the flow meter 301 and the heat source 1, a flow meter 301 is connected to the water inlet pipe 105, a safety valve 3 is arranged between the flow meter 301 and the cold source 2, and the flow meter 301 preferably adopts an electromagnetic flow meter, which is used to record the flow rate of circulating water in the circulating pipeline. In order to prevent the pressure in the circulating pipeline from exceeding the preset value, thereby causing the pipeline to rupture or the pipeline connection to loosen, the safety valve 3 is arranged to automatically release the pressure when the pressure in the circulating pipeline exceeds the preset value, thereby further improving the service life and safety of the circulating water secondary utilization device.

[0022] When the utility model is used, the water delivery pipe 103 is opened first. At this time, the circulating water with high heat is guided to the several water delivery joint pipes 104 connected in series through the circulation pump 102, and the water shut-off valve 1041 is closed. By observing the change of the pressure gauge 1042, the water delivery joint pipe 104 is leak-checked, and then the circulating water with high temperature heat is introduced into the water inlet pipe 105 through the water delivery joint pipe 104, and finally enters the cold source 2. At this time, the flow meter 301 will record the flow of the circulating water introduced into the cold source 2. The cold source 2 absorbs the heat of the circulating water, and then the circulating water changes from high heat to low heat. Then the low heat circulating water enters the several cooling branch pipes 2021 of the several cooling pipelines 202 connected in series through the outlet pipe 201, and finally enters the return pipe 203, enters the heat source 1 through the return pipe, and cools the heat source 1. At this time, the circulating water becomes high heat circulating water again.

[0023] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A circulating water secondary utilization device for a liquefaction plant, comprising a heat source (1), a cold source (2) being arranged on one side of the heat source (1), characterized in that: One end of the heat source (1) is connected to a water pipe (103), and further comprises: A circulation pump (102), the circulation pump (102) being arranged on a water delivery pipe (103), the other end of the water delivery pipe (103) being connected to a water delivery joint pipe (104), a plurality of the water delivery joint pipes (104) being connected in series, the other ends of the plurality of the series-connected water delivery joint pipes (104) being connected to a water inlet pipe (105), the other end of the water inlet pipe (105) being connected to a cold source (2), the other end of the cold source (2) being connected to a water outlet pipe (201), the other end of the water outlet pipe (201) being connected to a plurality of cooling pipes (202), the plurality of the cooling pipes (202) being connected in series, the other ends of the plurality of the series-connected cooling pipes (202) being connected to a water return pipe (203), the other end of the water return pipe (203) being connected to a heat source (1), and being used for heat exchange between the heat source (1) and the cold source (2) through circulating water.

2. The circulating water secondary utilization device for a liquefaction plant according to claim 1, characterized in that: The water delivery pipe (103) is provided with a water delivery valve (101), and the water delivery valve (101) is arranged between the circulation pump (102) and the heat source (1).

3. The circulating water secondary utilization device for a liquefaction plant according to claim 1, characterized in that: A water shut-off valve (1041) is provided at the end of the plurality of water delivery joint pipes (104), and a pressure gauge (1042) is provided at the other end of the water shut-off valve (1041).

4. The circulating water secondary utilization device for a liquefaction plant according to claim 1, characterized in that: A water shutoff valve (1041) and a pressure gauge (1042) are connected between the plurality of cooling pipelines (202), and the cooling pipeline (202) comprises a plurality of cooling branch pipes (2021).

5. The circulating water secondary utilization device for a liquefied chemical plant according to claim 1, characterized in that: The return water pipe (203) is connected to a flow meter (301), and a safety valve (3) is provided between the flow meter (301) and the heat source (1).

6. The circulating water secondary utilization device for a liquefaction plant according to claim 1, characterized in that: The water inlet pipe (105) is connected to a flow meter (301), and a safety valve (3) is provided between the flow meter (301) and the cold source (2).

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