Grading recycling method and grading recycling device of waste heat energy in petrochemical technology process
A petrochemical and process technology, applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physical chemical processes, etc., can solve the problem of insufficient cooling circulating water, etc., to reduce cooling energy consumption and reduce Cooling capacity and water saving effect
Inactive Publication Date: 2012-01-18
SHENYANG HUAYU GROUND SOURCE HEAT PUMP HEATING
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem that the existing technology cannot sufficiently cool the circulating water in the petrochemical process, and propose a method and system for recovering waste heat energy in a petrochemical process by stages, which can collect petrochemical process according to different temperature sections. The chemical reaction waste heat generated in the chemical reaction, and then according to the grade of the waste heat (that is, the temperature is different), the heat recovery and utilization can maximize the reuse of the waste heat in the petrochemical process equipment, and maximize the realization of energy saving and emission reduction. consumption
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[0017] The method for grading and recycling waste heat energy in the petrochemical process proposed by the present invention and its device are described in detail as follows in conjunction with the accompanying drawings and examples:
[0018] An embodiment of the method of the present invention is a method for classifying and recycling waste heat energy when the heat generated by the chemical reaction in the petrochemical process is 150-160°C. The method specifically includes the following steps:
[0019] 1) Set up the 1st, 2nd and 3rd temperature level cooling water recycling device, the circulating water circuit of the three temperature level cooling water recycling device and the circulating water circuit of the cooling system of the original chemical process are respectively connected with the reaction kettle in the petrochemical process flow , set 3 temperature control thresholds T 1 , T 2 , T 3 , T 1 , T 2 from T 0 -T 3 value, where T 0 is the lower value of hea...
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The invention relates to a grading recycling method and a grading recycling device of waste heat energy in a petrochemical technology process, belonging to the technical field of waste heat recycling. The grading recycling method comprises the following steps: installing a cooling water recycling devices in N temperature grades, wherein circulating water ways of the cooling water recycling devicein each grade and circulating water ways of a cooling system in an original petrochemical technology are all connected with a reaction kettle in the petrochemical technology process; when the reaction kettle works, detecting the temperature of a water inlet and a water outlet of the reaction kettle in real time; when the temperature of the water inlet of the reaction kettle is lower than or equalto a supplying water temperature value of cooling water inside the cooling system in the original petrochemical technology, communicating the circulating water ways of the cooling water recycling device in corresponding grades according to the temperature of different water outlets; and when the temperature of the water inlet of the reaction kettle is higher than the supplying water temperature value of the cooling water, communicating the circulating water ways of the cooling system in the original petrochemical technology with the reaction kettle. The invention utilizes the waste heat inside the petrochemical technology device in a grading way, thereby furthest realizing the energy saving, the emission reduction and the consumption reduction.
Description
technical field [0001] The invention belongs to the technical field of waste heat recovery, and particularly relates to a method and a device for grading recovery and utilization of waste heat energy in a petrochemical process flow. Background technique [0002] There is a large amount of waste heat in the petrochemical process, which is generated by chemical reactions. The heat and temperature generated by different chemical reactions are different, some are 150-160℃, and some are 70-80℃. These heat are generally taken away by cooling circulating water. In this way, a cooling tower connected to the reactor is set up in the factory to form a cooling water circulating system. Since the temperature of the cooling circulating water is generally only 20-30 °C, the heat generated by the chemical reaction is A lot of them are collected in the cooling circulating water in the end, so the grade is very low and cannot be used. It also needs to consume electricity and use a cooling w...
Claims
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IPC IPC(8): B01J19/00
Inventor 张军刘亚兵
Owner SHENYANG HUAYU GROUND SOURCE HEAT PUMP HEATING