High-pressure temperature-adjusting water heat recycling device of urea system

Abstract

The utility model relates to the technical field of urea production heat recovery, in particular to a urea system high-pressure temperature-regulating water heat recycling device which comprises a high-pressure washer, a high-pressure temperature-regulating water heat exchanger, a circulating water device, a steam heater, a water tank and a heating water user. The high-pressure temperature-regulating water heat exchanger is reasonable and compact in structure and convenient to use, the circulating water side inlet opening of the high-pressure temperature-regulating water heat exchanger serves as a heating water inlet, the circulating water side outlet opening of the high-pressure temperature-regulating water heat exchanger serves as a heating water outlet, heat of high-pressure temperature-regulating water is used for heat supply of a heating system, gradient utilization of energy is achieved, and energy is saved. The heat is recovered, the load of a steam pipe network and a circulating water device in the alcohol-ammonia co-production urea is effectively reduced, and meanwhile, the pollution of circulating water to the high-pressure temperature-regulating water when the circulating high-pressure temperature-regulating water heat exchanger leaks is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat recovery in urea production, and is a heat recovery device for high-pressure temperature-adjusting water in a urea system. Background Art

[0002] The alcohol-ammonia co-production of urea process is an advanced chemical production process that realizes the joint production of alcohols and ammonia, and simultaneously produces urea, an important chemical product.

[0003] Since the reaction is exothermic, circulating water is needed to remove the heat generated by the reaction in time to ensure the continuous progress of the reaction and production. However, this part of the energy is taken away by the circulating water, which not only wastes energy, but also increases the load of the circulating water device. Under the background of the dual carbon policy, how to reduce carbon emissions and improve energy utilization has become a constant pursuit of energy conservation and consumption reduction for enterprises.

[0004] Therefore, based on the energy waste problem in the above-mentioned alcohol-ammonia co-production of urea process, it is very necessary to develop a device for recovering waste heat and realizing cascade utilization of energy. Summary of the invention

[0005] The utility model provides a urea system high-pressure temperature regulating water heat recycling device, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the energy waste problem existing in the existing alcohol-ammonia co-production urea process.

[0006] The technical scheme of the utility model is realized by the following measures: a urea system high-pressure temperature-adjusting water heat recycling device, a high-pressure scrubber, a high-pressure temperature-adjusting water heat exchanger, a circulating water device, a steam heater, a water tank, and a heating water user. A high-pressure temperature-adjusting water main line is fixedly connected between the discharge end of the high-pressure scrubber and the first feed end of the high-pressure temperature-adjusting water heat exchanger, a circulating water supply line is fixedly connected between the second feed end of the high-pressure temperature-adjusting water heat exchanger and the first discharge end of the circulating water device, and a high-pressure temperature-adjusting water heat exchanger is connected to the first discharge end of the circulating water device. A circulating return pipeline is fixedly connected between the material end and the first feed end of the circulating water device, a heating water supply pipeline is fixedly connected between the circulating return pipeline of the heating water user inlet, a heating water return pipeline is fixedly connected between the heating water user outlet and the circulating supply pipeline, a steam condensate pipeline is fixedly connected between the first water inlet on the water tank top and the first discharge end of the steam heater, a heating make-up water pipeline is fixedly connected between the water tank outlet and the heating water return pipeline, and a water tank make-up water pipeline is fixedly connected between the second feed end of the water tank.

[0007] The following are further optimizations and / or improvements to the above utility model technical solution:

[0008] The above-mentioned urea system high-pressure temperature control water heat recycling device has a heating water make-up pump fixedly installed on the heating water make-up pipeline, a heating water circulation pump fixedly installed on the heating water return pipeline, and a high-pressure temperature control water main line fixedly installed with a high-pressure temperature control water pump.

[0009] In the above-mentioned urea system high-pressure temperature regulating water heat recycling device, a high-pressure temperature regulating water return pipeline is fixedly connected between the second discharge end of the high-pressure temperature regulating water heat exchanger and the feed end of the high-pressure washer, and a high-pressure temperature regulating water auxiliary pipeline is fixedly connected between the high-pressure temperature regulating water main line between the high-pressure temperature regulating water pump and the high-pressure temperature regulating water heat exchanger and the high-pressure temperature regulating water return pipeline.

[0010] The above-mentioned urea system high-pressure temperature regulating water heat recovery device has a steam pipeline fixedly connected to the first feed end of the steam heater, a heating water return pipeline between the heating water circulation pump and the circulating water supply pipeline and the second feed end of the steam heater is fixedly connected with a heating water return branch pipeline, and a heating water supply branch pipeline is fixedly connected between the second discharge end of the steam heater and the heating water supply pipeline.

[0011] The above-mentioned urea system high-pressure temperature regulating water heat recovery device has a first shower pipe fixedly connected to the heating water return pipeline between the heating water return branch pipeline and the circulating water supply pipeline, and a second shower pipe fixedly connected to the heating water supply pipeline between the heating water supply branch pipeline and the circulating water return pipeline.

[0012] The above-mentioned urea system high-pressure temperature regulating water heat recovery device has a first flow meter, a first pressure gauge, and a first temperature gauge fixedly arranged on the high-pressure temperature regulating water return pipeline in sequence along the medium flow direction, a second temperature gauge is fixedly arranged on the heating water supply pipeline between the second shower pipeline and the heating water supply branch pipeline, a third temperature gauge is fixedly arranged on the heating water supply pipeline between the heating water supply branch pipeline and the heating water user, a second pressure gauge is fixedly arranged on the heating water return pipeline between the heating water user and the heating feed water pipeline, a third pressure gauge is fixedly arranged on the heating water return pipeline between the heating water circulation pump and the heating water return branch pipeline, and a water tank liquid level gauge is fixedly arranged on the water tank.

[0013] The above-mentioned urea system high-pressure temperature-controlled water heat recycling device has a first regulating valve fixedly arranged on the high-pressure temperature-controlled water auxiliary pipeline, a second regulating valve fixedly arranged on the high-pressure temperature-controlled water main pipeline between the high-pressure temperature-controlled water pump and the high-pressure temperature-controlled water heat exchanger, a first valve group fixedly arranged on the circulating water supply pipeline between the circulating water device and the heating water return pipeline, a second valve group fixedly arranged on the circulating water return pipeline between the circulating water device and the heating water supply pipeline, a first stop valve fixedly arranged on the heating water supply pipeline between the circulating return pipeline and the second shower pipeline, a seventh stop valve fixedly arranged on the heating water supply pipeline between the second shower pipeline and the second thermometer, and a first valve group fixedly arranged on the circulating water supply pipeline between the circulating water return pipeline and the heating water return pipeline. A second stop valve is fixedly installed on the heating water return pipeline between the first and second shower pipes, an eighth stop valve is fixedly installed on the heating water return pipeline between the heating water return branch pipeline and the first shower pipe, a third regulating valve is fixedly installed on the heating water return pipeline between the eighth stop valve and the heating water return branch pipeline, a fourth regulating valve is fixedly installed on the heating water return branch pipeline, a third stop valve is fixedly installed on the heating water supply branch pipeline, a fourth stop valve is fixedly installed on the water tank replenishment pipeline, a fifth stop valve is fixedly installed on the steam pipeline, and a sixth stop valve is fixedly installed on the steam condensate pipeline, wherein the first valve group and the second valve group are respectively composed of two stop valves.

[0014] The above-mentioned urea system high-pressure temperature-controlled water heat recycling device also includes a DCS controller, and the heating water make-up pump, the first temperature meter, the first flow meter, the second pressure gauge, the water tank level gauge, and the third regulating valve are all electrically connected to the DCS controller.

[0015] The utility model has a reasonable and compact structure and is easy to use. It uses surplus heat for heating in the winter heating system, realizes the cascade utilization of energy, not only recovers heat, but also effectively reduces the load of the steam network, and at the same time avoids the pollution of the circulating water to the temperature regulating water when the circulating high-pressure temperature regulating water heat exchanger leaks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 This is a schematic diagram of the process flow of the utility model.

[0017] Attached Figure 1The codes are as follows: 1 is a high-pressure washer, 2 is a high-pressure temperature-controlled water heat exchanger, 3 is a circulating water device, 4 is a steam heater, 5 is a water tank, 6 is a heating water user, 7 is a heating water make-up pump, 8 is a heating water circulation pump, 9 is a high-pressure temperature-controlled water pump, 10 is a high-pressure temperature-controlled water main line, 11 is a high-pressure temperature-controlled water return line, 12 is a circulating water supply line, 13 is a circulating water return line, 14 is a heating water supply line, 15 is a heating water return line, 16 is a steam condensate line, 17 is a heating water supply line, 18 is a steam line, 19 is a heating water return branch line, 20 is a heating water supply branch line, 21 is a water tank make-up line, 22 is a high-pressure regulating Warm water auxiliary pipeline, 23 is the first shower pipeline, 24 is the second shower pipeline, 25 is the first temperature gauge, 26 is the first pressure gauge, 27 is the first flow meter, 28 is the second temperature gauge, 29 is the third temperature gauge, 30 is the second pressure gauge, 31 is the third pressure gauge, 32 is the water tank level gauge, 33 is the first regulating valve, 34 is the second regulating valve, 35 is the first valve group, 36 is the second valve group, 37 is the third valve group, 38 is the fourth valve group, 39 is the third regulating valve, 40 is the fourth regulating valve, 41 is the third stop valve, 42 is the fourth stop valve, 43 is the fifth stop valve, 44 is the sixth stop valve, 45 is the seventh stop valve, 46 is the eighth stop valve. DETAILED DESCRIPTION

[0018] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0019] In the present invention, unless otherwise specified, the equipment and devices used are all the equipment and devices known and used in the art.

[0020] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 The layout direction is determined by the

[0021] The present invention is further described below in conjunction with the embodiments and drawings:

[0022] Embodiment 1: As attached Figure 1As shown, the urea system high-pressure temperature-controlled water heat recycling device includes a high-pressure scrubber 1, a high-pressure temperature-controlled water heat exchanger 2, a circulating water device 3, a steam heater 4, a water tank 5, and a heating water user 6. A high-pressure temperature-controlled water main line 10 is fixedly connected between the discharge end of the high-pressure scrubber 1 and the first feed end of the high-pressure temperature-controlled water heat exchanger 2, a circulating water supply line 12 is fixedly connected between the second feed end of the high-pressure temperature-controlled water heat exchanger 2 and the first discharge end of the circulating water device 3, and a high-pressure temperature-controlled water main line 10 is fixedly connected between the first discharge end of the high-pressure temperature-controlled water heat exchanger 2 and the first feed end of the circulating water device 3. A circulating return pipeline 13 is fixedly connected, a heating water supply pipeline 14 is fixedly connected between the inlet of the heating water user 6 and the circulating return pipeline 13, a heating water return pipeline 15 is fixedly connected between the outlet of the heating water user 6 and the circulating supply pipeline 12, a steam condensate pipeline 16 is fixedly connected between the first water inlet at the top of the water tank 5 and the first discharge end of the steam heater 4, a heating make-up water pipeline 17 is fixedly connected between the water outlet of the water tank 5 and the heating water return pipeline 15, and a water tank make-up water pipeline 21 is fixedly connected to the second water inlet at the top of the water tank 5.

[0023] The utility model uses the heat of high-pressure temperature-regulated water for heating in the heating system and forms a double circuit with the original heating system, which not only recovers heat but also effectively reduces the load of the circulating water device and the steam pipe network, while ensuring the stability of the heating water system.

[0024] The above urea system high pressure temperature regulating water heat recovery device can be further optimized and / or improved according to actual needs:

[0025] Embodiment 2: It is different from Embodiment 1 in that: Figure 1 As shown, a heating water make-up pump 7 is fixedly installed on the heating water make-up pipeline 17, a heating water circulation pump 8 is fixedly installed on the heating water return pipeline 15, and a high-pressure temperature-adjusting water pump 9 is fixedly installed on the high-pressure temperature-adjusting water main line 10.

[0026] Embodiment 3: It differs from Embodiment 1 to Embodiment 2 in that: Figure 1 As shown, a high-pressure temperature-controlled water return pipeline 11 is fixedly connected between the second discharge end of the high-pressure temperature-controlled water heat exchanger 2 and the feed end of the high-pressure washer 1, and a high-pressure temperature-controlled water secondary pipeline 22 is fixedly connected between the high-pressure temperature-controlled water main pipeline 10 between the high-pressure temperature-controlled water pump 9 and the high-pressure temperature-controlled water heat exchanger 2 and the high-pressure temperature-controlled water return pipeline 11.

[0027] Embodiment 4: It differs from Embodiments 1 to 3 in that: Figure 1As shown, the first feed end of the steam heater 4 is fixedly connected to a steam pipeline 18, the heating water return pipeline 15 between the heating water circulation pump 8 and the circulating water supply pipeline 12 and the second feed end of the steam heater 4 are fixedly connected to a heating water return branch pipeline 19, and the second discharge end of the steam heater 4 and the heating water supply pipeline 14 are fixedly connected to a heating water supply branch pipeline 20.

[0028] Embodiment 5: It differs from Embodiments 1 to 4 in that: Figure 1 As shown, a first shower pipe 23 is fixedly connected to the heating water return pipeline 15 between the heating water return branch pipeline 19 and the circulating water supply pipeline 12, and a second shower pipe 24 is fixedly connected to the heating water supply pipeline 14 between the heating water supply branch pipeline 20 and the circulating water return pipeline 13. The first shower pipe 23 and the second shower pipe 24 are respectively arranged between two valves for controlling drainage and detecting whether the valve is leaking.

[0029] Embodiment 6: It differs from Embodiments 1 to 5 in that: Figure 1 As shown, a first flow meter 27, a first pressure gauge 26 and a first thermometer 25 are fixedly arranged on the high-pressure temperature-controlled water return pipeline 11 in sequence along the flow direction of the medium, a second thermometer 28 is fixedly arranged on the heating water supply pipeline 14 between the second shower pipeline 24 and the heating water supply branch pipeline 20, a third thermometer 29 is fixedly arranged on the heating water supply pipeline 14 between the heating water supply branch pipeline 20 and the heating water user 6, a second pressure gauge 30 is fixedly arranged on the heating water return pipeline 15 between the heating water user 6 and the heating make-up water pipeline 17, a third pressure gauge 31 is fixedly arranged on the heating water return pipeline 15 between the heating water circulation pump 8 and the heating water return branch pipeline 19, and a water tank liquid level gauge 32 is fixedly arranged on the water tank 5.

[0030] Embodiment 7: It differs from Embodiments 1 to 6 in that: Figure 1As shown, a first regulating valve 33 is fixedly provided on the high-pressure temperature-adjusting water auxiliary pipeline 22, a second regulating valve 34 is fixedly provided on the high-pressure temperature-adjusting water main pipeline 10 between the high-pressure temperature-adjusting water auxiliary pipeline 22 and the high-pressure temperature-adjusting water heat exchanger 2, a first valve group 35 is fixedly provided on the circulating water supply pipeline 12 between the circulating water device 3 and the heating water return pipeline 15, a second valve group 36 is fixedly provided on the circulating water return pipeline 13 between the circulating water device 3 and the heating water supply pipeline 14, a first stop valve 37 is fixedly provided on the heating water supply pipeline 14 between the circulating water return pipeline 13 and the second shower line 24, a seventh stop valve 45 is fixedly provided on the heating water supply pipeline 14 between the second shower line 24 and the second thermometer 28, and a seventh stop valve 46 is fixedly provided on the circulating water supply pipeline 12 and the first shower line 23. A second stop valve 38 is fixedly provided on the heating water return pipeline 15 between the heating water return branch pipeline 19 and the first shower pipeline 23, an eighth stop valve 46 is fixedly provided on the heating water return pipeline 15 between the eighth stop valve 46 and the heating water return branch pipeline 19, a fourth regulating valve 40 is fixedly provided on the heating water return branch pipeline 19, a third stop valve 41 is fixedly provided on the heating water supply branch pipeline 20, a fourth stop valve 42 is fixedly provided on the water tank replenishment pipeline 21, a fifth stop valve 43 is fixedly provided on the steam pipeline 18, and a sixth stop valve 44 is fixedly provided on the steam condensate pipeline 16, wherein the first valve group 33 and the second valve group 36 are respectively composed of two stop valves.

[0031] Embodiment 8: It differs from Embodiments 1 to 7 in that: Figure 1 As shown, the device also includes a DCS controller, and the heating water make-up pump 7, the first temperature meter 25, the first flow meter 27, the second pressure gauge 30, the water tank level gauge 32, and the third regulating valve 39 are all electrically connected to the DCS controller.

[0032] According to the needs, the DCS controller model in the utility model can be the CS3000 controller produced by Yokogawa Corporation of Japan.

[0033] As needed, interlock protection is set between the heating water make-up pump 7, the water tank level gauge 32 and the second pressure gauge 30. When the pressure of the second pressure gauge 30 on the heating water return pipeline 15 is low and the water tank level gauge 32 is higher than 70%, the interlock starts the heating water make-up pump 7 to replenish water and pressure to the heating water system; during normal operation, the changes of the second pressure gauge 30 on the heating water return pipeline 15 and the start-up frequency of the heating water make-up pump 7 are monitored. When there are significant changes, it is necessary to check whether there are leaks on the heating water system site. At the same time, take into account whether the first flow meter 27 has significant fluctuations to prevent internal leakage of the high-pressure temperature-controlled water heat exchanger 2.

[0034] An automatic control loop is provided between the first thermometer 25 and the third regulating valve 39 . To ensure that the temperature control range of the first thermometer 25 is 112° C. (±3° C.), the opening of the third regulating valve 39 is regulated according to the monitoring data of the first thermometer 25 .

[0035] As required, the pipelines and equipment of the urea system high-pressure temperature regulating water heat recovery device can also be provided with conventional valves, temperature gauges and pressure gauges known in the art according to production needs.

[0036] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0037] The use process of the embodiment of the utility model is as follows: first, open the fourth stop valve 42 to replenish water to the water tank 5 and establish the liquid level of the water tank 5; then, open the heating water replenishment pump 7, the heating water circulation pump 8, the third regulating valve 39, the eighth stop valve 46, the second stop valve 38, the high-pressure temperature-controlled water heat exchanger 2, the first stop valve 37, the seventh stop valve 45, and the heating water user 6 in sequence to establish the first heating water circuit; finally, open the high-pressure washer 1, the high-pressure temperature-controlled water pump 9, the second regulating valve 34, and the high-pressure temperature-controlled water heat exchanger 2 in sequence to establish the high-pressure temperature-controlled water system; when the first heating water circuit is insufficient due to the high-pressure temperature-controlled water system, open the third stop valve 41, the fourth regulating valve 40 and the fifth stop valve 43, the sixth stop valve 44 to establish the second heating water circuit, use the heating steam condensate as part of the water replenishment of the heating water system, use steam to provide heat, connect the first heating water circuit to form a double circuit to ensure the stability of the heating water system.

[0038] When the heating water system is switched with the circulating water device, the loop end is switched first, that is, the second valve group 36 is gradually opened, and the first stop valve 37 and the seventh stop valve 45 are closed in sequence. Then the inlet end is switched, the first valve group 35 is opened, and the second stop valve 38 and the eighth stop valve 46 are gradually closed.

Claims

1. A urea system high pressure temperature regulating water heat recovery device, characterized in that It includes a high-pressure washer, a high-pressure temperature-controlled water heat exchanger, a circulating water device, a steam heater, a water tank, and a heating water user. A high-pressure temperature-controlled water main pipeline is fixedly connected between the discharge end of the high-pressure washer and the first feed end of the high-pressure temperature-controlled water heat exchanger, a circulating water supply pipeline is fixedly connected between the second feed end of the high-pressure temperature-controlled water heat exchanger and the first discharge end of the circulating water device, a circulating return water pipeline is fixedly connected between the first discharge end of the high-pressure temperature-controlled water heat exchanger and the first feed end of the circulating water device, a heating water supply pipeline is fixedly connected between the inlet circulating return water pipeline of the heating water user, a heating water return pipeline is fixedly connected between the outlet of the heating water user and the circulating water supply pipeline, a steam condensate pipeline is fixedly connected between the first water inlet on the top of the water tank and the first discharge end of the steam heater, a heating make-up water pipeline is fixedly connected between the water outlet of the water tank and the heating water return pipeline, and the second feed end of the water tank is fixedly connected with the water tank make-up water pipeline.

2. The urea system high pressure temperature regulating water heat recovery device according to claim 1, characterized in that A heating water make-up pump is fixedly installed on the heating water make-up pipeline, a heating water circulation pump is fixedly installed on the heating water return pipeline, and a high-pressure temperature-control water pump is fixedly installed on the high-pressure temperature-control water main line.

3. The urea system high pressure temperature regulating water heat recovery device according to claim 1 or 2, characterized in that A high-pressure temperature-controlled water return pipeline is fixedly connected between the second discharge end of the high-pressure temperature-controlled water heat exchanger and the feed end of the high-pressure washer, and a high-pressure temperature-controlled water auxiliary pipeline is fixedly connected between the high-pressure temperature-controlled water main pipeline between the high-pressure temperature-controlled water pump and the high-pressure temperature-controlled water heat exchanger and the high-pressure temperature-controlled water return pipeline.

4. The urea system high pressure temperature regulating water heat recovery device according to claim 1 or 2, characterized in that The first feed end of the steam heater is fixedly connected with a steam pipeline, the heating water return pipeline between the heating water circulation pump and the circulating water supply pipeline and the second feed end of the steam heater are fixedly connected with a heating water return branch pipeline, and the second discharge end of the steam heater and the heating water supply pipeline are fixedly connected with a heating water supply branch pipeline.

5. The urea system high pressure temperature regulating water heat recovery device according to claim 3, characterized in that The first feed end of the steam heater is fixedly connected with a steam pipeline, the heating water return pipeline between the heating water circulation pump and the circulating water supply pipeline and the second feed end of the steam heater are fixedly connected with a heating water return branch pipeline, and the second discharge end of the steam heater and the heating water supply pipeline are fixedly connected with a heating water supply branch pipeline.

6. The urea system high pressure temperature regulating water heat recovery device according to claim 5, characterized in that A first shower pipe is fixedly connected to the heating water return pipeline between the heating water return branch pipeline and the circulating water supply pipeline, and a second shower pipe is fixedly connected to the heating water supply pipeline between the heating water supply branch pipeline and the circulating water return pipeline.

7. The urea system high pressure temperature regulating water heat recovery device according to claim 5 or 6, characterized in that A first flow meter, a first pressure gauge and a first temperature gauge are fixedly installed on the high-pressure temperature-controlled water return pipeline in sequence along the medium flow direction, a second temperature gauge is fixedly installed on the heating water supply pipeline between the second shower pipeline and the heating water supply branch pipeline, a third temperature gauge is fixedly installed on the heating water supply pipeline between the heating water supply branch pipeline and the heating water user, a second pressure gauge is fixedly installed on the heating water return pipeline between the heating water user and the heating make-up water pipeline, a third pressure gauge is fixedly installed on the heating water return pipeline between the heating water circulation pump and the heating water return branch pipeline, and a water tank liquid level gauge is fixedly installed on the water tank.

8. The urea system high pressure temperature regulating water heat recovery device according to claim 7, characterized in that A first regulating valve is fixedly arranged on the high-pressure temperature-controlled water auxiliary pipeline, a second regulating valve is fixedly arranged on the high-pressure temperature-controlled water main pipeline between the high-pressure temperature-controlled water pump and the high-pressure temperature-controlled water heat exchanger, a first valve group is fixedly arranged on the circulating water supply pipeline between the circulating water device and the heating water return pipeline, a second valve group is fixedly arranged on the circulating return water pipeline between the circulating water device and the heating water supply pipeline, a first stop valve is fixedly arranged on the heating water supply pipeline between the circulating return water pipeline and the second shower pipeline, a seventh stop valve is fixedly arranged on the heating water supply pipeline between the second shower pipeline and the second thermometer, and a seventh stop valve is fixedly arranged on the heating water supply pipeline between the circulating water supply pipeline and the first shower pipeline. A second stop valve is fixedly installed on the warm water return pipeline, an eighth stop valve is fixedly installed on the heating water return pipeline between the heating water return branch pipeline and the first shower pipeline, a third regulating valve is fixedly installed on the heating water return pipeline between the eighth stop valve and the heating water return branch pipeline, a fourth regulating valve is fixedly installed on the heating water return branch pipeline, a third stop valve is fixedly installed on the heating water supply branch pipeline, a fourth stop valve is fixedly installed on the water tank replenishment pipeline, a fifth stop valve is fixedly installed on the steam pipeline, and a sixth stop valve is fixedly installed on the steam condensate pipeline, wherein the first valve group and the second valve group are respectively composed of two stop valves.

9. The urea system high pressure temperature regulating water heat recovery device according to claim 8, characterized in that It also includes a DCS controller, and a heating water make-up pump, a first temperature meter, a first flow meter, a second pressure gauge, a water tank level gauge, and a third regulating valve are all electrically connected to the DCS controller.

Images