Feed water preheater for dry quenching

Abstract

The utility model discloses a feed water preheater for dry quenching, and relates to the technical field of dry quenching circulating gas heat exchange. The device comprises a dry quenching circulating gas collecting box, a deoxidizing pump water outlet pipe and a deaerator water inlet pipe, a plurality of heat exchange assemblies are arranged in the dry quenching circulating gas collecting box in a penetrating mode, and inlets of the heat exchange assemblies are connected with the deoxidizing pump water outlet pipe through inlet valves. Outlets of the multiple sets of heat exchange assemblies are connected with a water inlet pipe of the deaerator through outlet valves, independent control over each set of heat exchange assemblies is achieved through the inlet valves and the outlet valves, heat exchange pipes are connected in parallel, and when a single set of heat exchange pipes go wrong, the set of heat exchange pipes can be rapidly cut off through the inlet valves and the outlet valves; and the other groups of heat exchange tubes can be normally used, so that the effect of prolonging the fixed repair period of the dry quenching is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dry quenching circulating gas heat exchange technical field, especially relates to a dry quenching feedwater preheater. BACKGROUND

[0002] The dry quenching feedwater preheater is used for further reducing the temperature of dry quenching circulating gas. The traditional dry quenching feedwater preheater has some defects, for example, the heat exchange assembly is usually of integral structure, once a part appears failure, the whole preheater may need to be maintained or replaced after shutdown, which seriously affects the production continuity of dry quenching, leads to shortening of dry quenching fixed repair period, increases production cost and maintenance difficulty, and the dry quenching shutdown once operation of steam turbine generator set runs, and the loss of power generation is about 1.46*10 4 degrees. SUMMARY

[0003] In view of the above technical problems, the utility model provides a dry quenching feedwater preheater, which is used to solve the problem that the traditional dry quenching feedwater preheater is affected by heat exchange assembly failure and production continuity.

[0004] In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] A dry quenching feedwater preheater, comprising a dry quenching circulating gas header, a deaerator pump water outlet pipe and a deaerator water inlet pipe, a plurality of groups of heat exchange assemblies are arranged in the dry quenching circulating gas header, the inlet of each group of heat exchange assemblies is connected with the deaerator pump water outlet pipe through an inlet valve, and the outlet of each group of heat exchange assemblies is connected with the deaerator water inlet pipe through an outlet valve, and the independent control of each group of heat exchange assemblies is realized through the inlet valve and the outlet valve.

[0006] The heat exchange assembly is composed of a radial heat exchange pipe, a water inlet header and a water outlet header, the radial heat exchange pipe is arranged in the dry quenching circulating gas header, and the two ends of the radial heat exchange pipe outside the dry quenching circulating gas header are respectively connected with the water inlet header and the water outlet header.

[0007] Further, the deaerator pump water outlet pipe and the deaerator water inlet pipe are connected through a short circuit valve.

[0008] Further, a temperature pneumatic regulating valve is installed on the deaerator water inlet pipe.

[0009] Compared with the prior art, the utility model has the advantages of:

[0010] 1. By connecting the heat exchange pipes in parallel with each other, when a single heat exchange pipe appears problem, the inlet valve and the outlet valve can quickly cut off the heat exchange pipe, this method only stops one heat exchanger, and other groups of heat exchange pipes can be normally used, so that the dry quenching fixed repair period is prolonged.

[0011] 2, install temperature pneumatic regulating valve on the deaerator inlet pipe, can effectively reduce the labor intensity of the operator, reduce the number of manual temperature adjustment, realize remote accurate adjustment. Can according to the actual demand in the production process, in time, accurately adjust the feed water temperature, meet the strict requirements of dry quenching process on temperature, improve the production efficiency and product quality of dry quenching;

[0012] 3, the deaerator pump outlet pipe and the deaerator inlet pipe are communicated through the short circuit valve, which provides more flexibility and adjustability for system operation. In some special working conditions, the water flow path can be adjusted through the short circuit valve to meet different production requirements, further improving the adaptability and reliability of the dry quenching feed water preheater. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] In the drawing:

[0015] 1, dry quenching circulating gas header; 2, deaerator pump outlet pipe; 3, deaerator inlet pipe; 5, inlet valve; 6, outlet valve; 7, radial heat exchange pipe; 8, inlet header; 9, outlet header; 10, short circuit valve; 11, temperature pneumatic regulating valve. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the utility model more clear and clear, the utility model is further described in detail below in combination with specific implementation manners and with reference to the drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0017] A dry quenching feed water preheater, comprising a dry quenching circulating gas header 1, a deaerator pump outlet pipe 2 and a deaerator inlet pipe 3, a plurality of groups of heat exchange assemblies are arranged in the dry quenching circulating gas header 1, the inlets of the plurality of groups of heat exchange assemblies are connected with the deaerator pump outlet pipe 2 through inlet valves 5, and the outlets of the plurality of groups of heat exchange assemblies are connected with the deaerator inlet pipe 3 through outlet valves 6. Independent control of each group of heat exchange assemblies is realized through the inlet valves 5 and the outlet valves 6.

[0018] The heat exchange assembly is composed of a radial heat exchange pipe 7, an inlet header 8 and an outlet header 9, the radial heat exchange pipe 7 is arranged in the dry quenching circulating gas header 1, and the two ends of the radial heat exchange pipe 7 outside the dry quenching circulating gas header 1 are respectively connected with the inlet header 8 and the outlet header 9.

[0019] By connecting the heat exchange pipes in parallel, when a single group of heat exchange pipes has a problem, the inlet valve 5 and the outlet valve 6 are used to quickly cut off the group of heat exchange pipes, and the other groups of heat exchange pipes can be normally used, thereby prolonging the dry quenching repair cycle, and according to the dry quenching production experience, two groups of heat exchangers can be closed to stabilize the dry quenching normal production.

[0020] The deaerator inlet pipe 3 is connected to the deaerator outlet pipe 2 through a bypass valve 10. In some special cases, for example, when the system needs to be debugged, all the heat exchange components are closed, or the system pressure and flow need to be adjusted, the bypass valve 10 can be opened to change the water flow path, so that the water in the deaerator outlet pipe 2 flows directly into the deaerator inlet pipe 3 through the bypass valve 10, providing more flexibility and adjustability for system operation.

[0021] The deaerator inlet pipe 3 is provided with a temperature pneumatic regulating valve 11. The temperature pneumatic regulating valve 11 is connected to the control system, and the temperature of the water in the deaerator inlet pipe 3 is monitored in real time through a sensor, and the temperature signal is fed back to the control system. The control system automatically controls the opening of the temperature pneumatic regulating valve 11 according to the preset temperature value, so as to accurately adjust the water flow into the deaerator, and realize accurate control of the water temperature. The operator can operate the temperature pneumatic regulating valve 11 through the remote control system, without the need for manual frequent on-site adjustment, greatly reducing the labor intensity of the operating personnel, and improving the accuracy and timeliness of temperature adjustment, meeting the strict requirements of the dry quenching process on the water temperature.

[0022] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A feedwater preheater for dry quenching, characterized by: Including dry quenching circulation gas header (1), oxygen removal pump water outlet pipe (2) and oxygen removal device water inlet pipe (3), the dry quenching circulation gas header (1) is internally provided with a plurality of groups of heat exchange components, the inlet of the plurality of groups of heat exchange components is connected with the oxygen removal pump water outlet pipe (2) through an inlet valve (5), the outlet of the plurality of groups of heat exchange components is connected with the oxygen removal device water inlet pipe (3) through an outlet valve (6), and independent control of each group of heat exchange components is realized through the inlet valve (5) and the outlet valve (6). The heat exchange component is composed of a radial heat exchange pipe (7), a water inlet header (8) and a water outlet header (9), the radial heat exchange pipe (7) is arranged in the dry quenching circulation gas header (1), and the two ends of the radial heat exchange pipe (7) located outside the dry quenching circulation gas header (1) are respectively connected with the water inlet header (8) and the water outlet header (9).

2. A feedwater preheater for dry quenching according to claim 1, characterized in that: The oxygen removal pump water outlet pipe (2) and the oxygen removal device water inlet pipe (3) are communicated through a short circuit valve (10).

3. A feedwater preheater for dry quenching according to claim 2, characterized in that: A temperature pneumatic regulating valve (11) is installed on the oxygen removal device water inlet pipe (3).

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