Device for reducing 0.08 MPa flash steam quantity

Abstract

The invention relates to the technical field of stable operation of chemical equipment systems, and discloses a device for reducing the volume of 0.08 MPa flash steam, which comprises a condensate pipeline for introducing a hot spot, one end of the condensate pipeline for introducing the hot spot is fixedly connected with an upper-stage flash tank V-03, and the other end of the condensate pipeline for introducing the hot spot is fixedly connected with a lower-stage flash tank V-04. And the other end of the condensate pipeline of the hot spot for introduction is fixedly connected with a next-stage flash tank V-04. According to the system, the hot spot heat exchanger, the hot spot condensate water feeding valve, the condensate pipeline for introducing hot spots, the heat medium pipeline, the heat valve for control and the condensate temperature monitoring thermometer are matched with one another, so that the system is more stable, the operation pressure is reduced, and potential safety hazards are reduced; through mutual cooperation of the hot spot condensate water return valve, the bypass valve of the whole hot spot and the water drainage and spray guide valve, the problems that excessive steam is not effectively utilized and is directly emptied, so that heat is wasted, and the operation cost is increased are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to chemical equipment system stable operation technical field, especially to a kind of 0.08MPa flash steam gas quantity device. BACKGROUND

[0002] In chemical production, the flash recovery of steam condensate is an important link of energy utilization, in the existing process, 0.4MPa steam condensate is directly into the next stage flash tank V-04 after the first stage flash tank V-03, and 0.08MPa low pressure steam is flashed out, which is all sent to the micro-positive pressure deaerator as heat source.

[0003] In this way, the gas quantity of 0.08MPa flash steam is too large, which easily leads to the high thermal load of micro-positive pressure deaerator, and the water seal is frequently broken, affecting the system stability, and the running pressure of the next stage flash tank V-04 exceeds the design value due to the excessive flash steam quantity, which has a great safety hazard, in addition, the excessive steam is not effectively utilized, which is directly vented, causing heat waste and increasing the operation cost. SUMMARY

[0004] The present application aims to solve the problems in the prior art, and provides a 0.08MPa flash steam gas quantity device, which can reduce the gas quantity of 0.08MPa flash steam, balance the equipment load and recover heat.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A 0.08MPa flash steam gas quantity device, comprising a condensate pipeline with hot spots for introduction, one end of the condensate pipeline with hot spots for introduction is fixedly connected with the first stage flash tank V-03, the other end of the condensate pipeline with hot spots for introduction is fixedly connected with the next stage flash tank V-04, and the first stage flash tank V-03 and the next stage flash tank V-04 are used for conveying condensate; A hot spot heat exchanger is fixedly connected to the middle section of the condensate pipeline with hot spots for introduction, and the hot spot heat exchanger is used for recovering heat in the condensate to reduce its temperature; A control heat valve is fixedly connected to the lower section of the condensate pipeline with hot spots for introduction, the right section of the condensate pipeline with hot spots for introduction is fixedly connected with a condensate temperature monitoring thermometer outside, the condensate temperature monitoring thermometer is arranged at the output end of the hot spot heat exchanger, and the control heat valve is linked with the hot spot heat exchanger, for adjusting the heat exchange intensity; Further, a hot medium pipeline is fixedly connected to the lower side of the hot spot heat exchanger, and the hot medium pipeline is used for introducing external hot medium to absorb the heat of the condensate; Further, the left segment outer wall of the condensate pipeline for introducing hot spot is fixedly connected with a hot spot condensate water inlet valve, the right segment outer wall of the condensate pipeline for introducing hot spot is fixedly connected with a hot spot condensate water return valve, the upper segment outer wall of the condensate pipeline for introducing hot spot is fixedly connected with a whole hot spot bypass valve, and the internal one end of the upper segment of the right side of the condensate pipeline for introducing hot spot is fixedly connected with a drainage guide valve, the hot spot condensate water inlet valve and the hot spot condensate water return valve are respectively arranged on the inlet pipeline and the outlet pipeline of the hot spot heat exchanger, and the whole hot spot bypass valve is connected in parallel on the pipeline where the hot spot heat exchanger is arranged, and is used for switching the condensate delivery path in an abnormal condition; Further, the hot spot condensate water inlet valve, the hot spot heat exchanger and the hot spot condensate water return valve are sequentially arranged on the condensate pipeline for introducing hot spot, and the drainage guide valve is arranged between the hot spot condensate water inlet valve and the hot spot heat exchanger; Further, the control heat valve is a temperature control regulating valve, the action signal of the control heat valve is linked with the output signal of the condensate temperature monitoring thermometer, so as to accurately control the heat recovery amount of the hot spot heat exchanger; Further, the pipe diameter of the whole hot spot bypass valve is consistent with the pipe diameter of the condensate pipeline for introducing hot spot, and the whole hot spot bypass valve can be completely opened to realize rapid cutting of the hot spot module; Further, the hot spot heat exchanger is a shell-and-tube structure, the cold side of the hot spot heat exchanger is connected with the condensate of the upper-stage flash tank V-03, and the hot side of the hot spot heat exchanger is connected with the hot medium pipeline.

[0006] The present application has the following beneficial effects: In the present application, the hot spot heat exchanger, the hot spot condensate water inlet valve, the condensate pipeline for introducing hot spot, the hot medium pipeline, the control heat valve and the condensate temperature monitoring thermometer are cooperated with each other, so as to solve the problem that the 0.08MPa flash steam gas amount is too large, the micro-positive pressure deaerator is prone to have a high thermal load, the water seal is prone to be broken frequently, the system stability is affected, the next-stage flash tank V-04 is prone to have an operating pressure exceeding the design value, and a large safety hazard exists.

[0007] In the present application, the hot spot condensate water return valve, the whole hot spot bypass valve and the drainage guide valve are cooperated with each other, the hot spot condensate water inlet valve and the hot spot condensate water return valve are used for controlling the hot spot use, the whole hot spot bypass valve is switched to bypass delivery when the hot spot heat exchanger is abnormal, and the drainage guide valve is used for warming the pipe and draining residual liquid, so as to solve the problem that the excessive steam is not effectively utilized, the heat is wasted directly, and the operation cost is increased. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 A condensate pipeline structure for introducing hot spot of a device for reducing 0.08MPa flash steam gas amount is provided in the present application.

[0009] Legend: 1, hot spot heat exchanger; 2, hot spot condensate water inlet valve; 3, condensate pipeline for introducing hot spot; 4, heat medium pipeline; 5, heat control valve; 6, condensate temperature monitoring thermometer; 7, hot spot condensate water return valve; 8, bypass valve of the whole hot spot; 9, drain valve. DETAILED DESCRIPTION

[0010] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0011] Reference Figure 1 An embodiment provided by the present application: a device for reducing 0.08MPa flash steam gas quantity, comprising a condensate pipeline 3 for introducing hot spot, one end of the condensate pipeline 3 for introducing hot spot is fixedly connected with a previous stage flash tank V-03, the other end of the condensate pipeline 3 for introducing hot spot is fixedly connected with a next stage flash tank V-04, the previous stage flash tank V-03 and the next stage flash tank V-04 are used for conveying condensate; A middle section of the condensate pipeline 3 for introducing hot spot is fixedly connected with a hot spot heat exchanger 1, the hot spot heat exchanger 1 is used for recovering heat in the condensate to reduce the temperature thereof, the condensate of the previous stage flash tank V-03 is conveyed to the hot spot heat exchanger 1 through the condensate pipeline 3 for introducing hot spot, and then is sent into the next stage flash tank V-04; A lower section of the condensate pipeline 3 for introducing hot spot is fixedly connected with a heat control valve 5, an outer right section of the condensate pipeline 3 for introducing hot spot is fixedly connected with a condensate temperature monitoring thermometer 6, the condensate temperature monitoring thermometer 6 is arranged at an output end of the hot spot heat exchanger 1, the heat control valve 5 is linked with the hot spot heat exchanger 1, is used for adjusting heat exchange intensity, the condensate temperature monitoring thermometer 6 monitors condensate temperature at the outlet of the hot spot heat exchanger 1 in real time, the heat control valve 5 adjusts heat medium flow, ensures that the condensate temperature is reduced to a target value, and reduces flash power of the next stage flash tank V-04.

[0012] A lower side of the hot spot heat exchanger 1 is fixedly connected with a heat medium pipeline 4, the heat medium pipeline 4 is used for introducing external heat medium to absorb heat of the condensate, the heat medium pipeline 4 introduces heat medium (such as low-temperature process water), exchanges heat with high-temperature condensate in the hot spot heat exchanger 1, recovers heat and reduces condensate temperature.

[0013] The left outer wall of the hot spot condensate pipeline 3 is fixedly connected with a hot spot condensate water inlet valve 2, the right outer wall of the hot spot condensate pipeline 3 is fixedly connected with a hot spot condensate water return valve 7, the upper outer wall of the hot spot condensate pipeline 3 is fixedly connected with a whole hot spot bypass valve 8, and the inner end of the upper right side of the hot spot condensate pipeline 3 is fixedly connected with a drainage guide valve 9. The hot spot condensate water inlet valve 2 and the hot spot condensate water return valve 7 are arranged at the inlet and outlet pipelines of the hot spot heat exchanger 1 respectively, the whole hot spot bypass valve 8 is connected in parallel to the pipeline where the hot spot heat exchanger 1 is arranged, is used for switching the condensate delivery path in an abnormal condition, the hot spot condensate water inlet valve 2 and the hot spot condensate water return valve 7 are used for controlling the hot spot use, the whole hot spot bypass valve 8 is switched to bypass delivery when the hot spot heat exchanger 1 is abnormal, and the drainage guide valve 9 is used for warming the pipeline and draining residual liquid.

[0014] The hot spot condensate water inlet valve 2, the hot spot heat exchanger 1 and the hot spot condensate water return valve 7 are arranged in sequence on the hot spot condensate pipeline 3, and the drainage guide valve 9 is arranged between the hot spot condensate water inlet valve 2 and the hot spot heat exchanger 1.

[0015] The hot spot valve 5 is a temperature control regulating valve, and the action signal of the hot spot valve 5 is linked with the output signal of the condensate temperature monitoring thermometer 6, so as to accurately control the heat recovery amount of the hot spot heat exchanger 1.

[0016] The pipe diameter of the whole hot spot bypass valve 8 is consistent with the pipe diameter of the hot spot condensate pipeline 3, and the whole hot spot bypass valve 8 can be completely opened to realize rapid removal of the hot spot module.

[0017] The hot spot heat exchanger 1 is a shell-and-tube structure, the cold side of the hot spot heat exchanger 1 is connected with the condensate of the upper-stage flash tank V-03, and the hot side of the hot spot heat exchanger 1 is connected with the hot medium pipeline 4.

[0018] Working principle: the device includes a condensate delivery module, a heat recovery module, a temperature control module and a switching module, and the device realizes the function of reducing the flash steam gas amount through the cooperative work of the above modules. The condensate delivery module: the high-temperature condensate from the upper-stage flash tank V-03 is delivered to the hot spot heat exchanger 1 through the hot spot condensate pipeline 3, and then is sent to the lower-stage flash tank V-04 after heat exchange treatment.

[0019] The heat recovery module: the hot medium pipeline 4 is connected with low-temperature hot medium (such as process water), so that the low-temperature hot medium exchanges heat with the high-temperature condensate in the hot spot heat exchanger 1, thereby recovering the heat in the condensate and effectively reducing the temperature of the condensate.

[0020] Temperature control module: condensate temperature monitoring thermometer 6 detects the condensate temperature at the outlet of heat point heat exchanger 1 in real time, and transmits the signal to control heat valve 5, which automatically adjusts the flow of heat medium according to the set temperature to accurately control the heat exchange intensity, ensure that the condensate temperature is stable at the target value, and reduce the amount of flash steam entering the next stage of flash tank V-04.

[0021] System switching and maintenance module: whether the condensate enters the heat exchange process is controlled by heat point condensate inlet valve 2 and heat point condensate return valve 7; the bypass valve 8 of the entire heat point can be switched to bypass operation when the heat exchanger is abnormal or under maintenance, ensuring continuous and stable operation of the system; the drain valve 9 is used for warm-up operation before starting and residual liquid discharge after shutdown to prevent liquid accumulation and freezing.

[0022] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified to the technical scheme recorded in the foregoing embodiments, or equivalent replacement of some technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A device for reducing flash vapor volume at 0.08 MPa, comprising a condensate pipe (3) for introducing hot water, characterized in that: One end of the condensate pipe (3) for introducing hot spot is fixedly connected to the upper flash tank V-03, and the other end of the condensate pipe (3) for introducing hot spot is fixedly connected to the lower flash tank V-04. The upper flash tank V-03 and the lower flash tank V-04 are used to transport condensate. The middle section of the condensate pipe (3) for introducing hot spot is fixedly connected to the hot spot heat exchanger (1), which is used to recover heat from the condensate to reduce its temperature. The lower section of the condensate pipe (3) for introducing the hot spot is fixedly connected to a control heat valve (5), and the right section of the condensate pipe (3) for introducing the hot spot is fixedly connected to a condensate temperature monitoring thermometer (6). The condensate temperature monitoring thermometer (6) is installed at the output end of the hot spot heat exchanger (1). The control heat valve (5) is linked with the hot spot heat exchanger (1) to adjust the heat exchange intensity.

2. The device for reducing flash steam volume at 0.08 MPa according to claim 1, characterized in that: The lower side of the heat exchanger (1) is fixedly connected to a heat transfer medium pipe (4), which is used to introduce an external heat transfer medium to absorb heat from the condensate.

3. The device for reducing flash steam volume at 0.08 MPa according to claim 2, characterized in that: The outer wall of the left section of the condensate inlet pipe (3) is fixedly connected to the condensate inlet valve (2), the outer wall of the right section of the condensate inlet pipe (3) is fixedly connected to the condensate return valve (7), the outer wall of the upper section of the condensate inlet pipe (3) is fixedly connected to the bypass valve (8) of the entire condensate inlet pipe, and the upper right section of the condensate inlet pipe (3) is fixedly connected to a drain valve (9). The condensate inlet valve (2) and the condensate return valve (7) are respectively installed in the inlet and outlet pipes of the condensate heat exchanger (1). The bypass valve (8) of the entire condensate inlet pipe is connected in parallel in the pipeline where the condensate heat exchanger (1) is located, and is used to switch the condensate delivery path in case of abnormality.

4. The device for reducing flash steam volume at 0.08 MPa according to claim 3, characterized in that: The hot spot condensate inlet valve (2), the hot spot heat exchanger (1) and the hot spot condensate return valve (7) are sequentially installed on the condensate pipe (3) that introduces the hot spot, and the drain valve (9) is installed between the hot spot condensate inlet valve (2) and the hot spot heat exchanger (1).

5. The device for reducing flash steam volume at 0.08 MPa according to claim 4, characterized in that: The control heat valve (5) is a temperature control regulating valve. Its action signal is linked with the output signal of the condensate temperature monitoring thermometer (6) to accurately control the heat recovery of the hot spot heat exchanger (1).

6. The device for reducing flash steam volume at 0.08 MPa according to claim 5, characterized in that: The diameter of the bypass valve (8) of the entire hot spot is the same as the diameter of the condensate pipe (3) leading to the hot spot, and it can be fully opened to achieve rapid disconnection of the hot spot module.

7. The device for reducing flash steam volume at 0.08 MPa according to claim 6, characterized in that: The heat exchanger (1) is a shell-and-tube structure. Its cold side is connected to the condensate of the flash tank V-03 of the previous stage, and its hot side is connected to the heat medium of the heat medium pipeline (4).

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