Device for improving steam yield and reducing discharge

Abstract

The utility model relates to the technical field of steam utilization of hydrogen chloride synthetic furnaces, in particular to a device for improving steam yield and reducing discharge, which comprises a hydrogen chloride synthetic furnace, a steam flash tank, a sewage sampling cooler and a water collecting tank. The hydrogen chloride synthetic furnace is communicated with a hydrogen chloride inlet pipeline, a chlorine inlet pipeline, a hydrogen inlet pipeline, a steam conveying pipeline, a hot water pipeline and a pure water inlet pipeline, the steam flash tank is communicated with a medium-pressure steam output pipeline, and a condensate pipeline is communicated between the steam flash tank and the pollution discharge sampling cooler; a sewage collection pipeline is communicated between the sewage discharge sampling cooler and the water collection tank, a three-way valve is mounted on the medium-pressure steam output pipeline, and an upper port of the three-way valve is communicated with a low-pressure steam output pipeline. The device is reasonable and compact in structure and convenient to use, improves the yield of the byproduct steam of the hydrogen chloride synthesis furnace, reduces the production cost and the adverse effect of steam discharge on the field environment and personnel inspection, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of steam utilization in a hydrogen chloride synthesis furnace, and is a device for increasing steam output and reducing external discharge. Background Art

[0002] The hydrogen chloride synthesis furnace uses heat energy to produce steam. During the synthesis of hydrogen chloride (HCl), it uses circulating water cooling and pure water to produce steam to cool the HCl gas. The steam from the hydrogen chloride synthesis furnace enters the steam flash tank for decompression to produce saturated steam, which then enters the steam distribution table and is merged into the medium-pressure steam external network for use by various users.

[0003] At present, due to the replacement of graphite blocks for the first time or overhaul of the hydrogen chloride synthesis furnace, the hydrogen chloride synthesis furnace needs 168 hours to gradually increase the capacity, and the steam slowly increases the pressure to dry the furnace. This will cause the by-product steam to be unable to be incorporated into the medium-pressure steam network due to low pressure. This causes a large amount of by-product steam from the hydrogen chloride synthesis furnace to be discharged during this period, which not only causes energy waste, but also pollutes the on-site environment. Summary of the invention

[0004] The utility model provides a device for increasing steam production and reducing external discharge, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problems of large amount of external discharge of by-product steam in the existing hydrogen chloride synthesis furnace, resulting in energy waste and environmental pollution.

[0005] The technical scheme of the utility model is achieved through the following measures: a device for increasing steam production and reducing external discharge, comprising a hydrogen chloride synthesis furnace, a steam flash tank, a sewage sampling cooler and a water collecting tank, the upper inlet of the hydrogen chloride synthesis furnace is fixedly connected with a hydrogen chloride air inlet pipeline, the first inlet at the bottom of the hydrogen chloride synthesis furnace is fixedly connected with a chlorine air inlet pipeline, the second inlet at the bottom of the hydrogen chloride synthesis furnace is fixedly connected with a hydrogen air inlet pipeline, the upper outlet of the hydrogen chloride synthesis furnace and the upper inlet of the steam flash tank are fixedly connected with a steam delivery pipeline, the lower outlet of the steam flash tank is fixedly connected with a steam delivery pipeline, and the lower outlet of the steam flash tank is fixedly connected with a steam delivery pipeline. A hot water pipeline is fixedly connected between the outlet and the first inlet of the lower part of the hydrogen chloride synthesis furnace, a pure water inlet pipeline is fixedly connected to the second inlet of the lower part of the hydrogen chloride synthesis furnace, a medium-pressure steam output pipeline is fixedly connected to the top outlet of the steam flash tank, a condensate pipeline is fixedly connected between the bottom outlet of the steam flash tank and the top inlet of the sewage sampling cooler, a sewage collection pipeline is fixedly connected between the top outlet of the sewage sampling cooler and the top inlet of the water collecting tank, a three-way valve is fixedly installed on the medium-pressure steam output pipeline, and the upper port of the three-way valve is fixedly connected to the low-pressure steam output pipeline.

[0006] The following are further optimizations and / or improvements to the above utility model technical solution:

[0007] The above also includes a DCS controller. A first regulating valve is fixedly installed on the medium-pressure steam output pipeline between the three-way valve and the steam flash tank. A remote pressure gauge is arranged on the top of the steam flash tank. The first regulating valve and the remote pressure gauge are both electrically connected to the DCS controller. An interlock is arranged between the first regulating valve and the remote pressure gauge.

[0008] A second regulating valve is fixedly installed on the above-mentioned pure water inlet pipeline, a remote liquid level gauge is provided on the flash tank, and a third automatic control valve is fixedly installed on the condensate pipeline. The second regulating valve, the third automatic control valve and the remote liquid level gauge are all electrically connected to the DCS controller, and an interlock is provided between the second regulating valve and the remote liquid level gauge.

[0009] A vent valve is also provided on the top of the steam flash tank. The vent valve is electrically connected to the DCS controller, and an interlock is provided between the vent valve and the remote pressure gauge.

[0010] A first automatic control valve is fixedly installed on the medium-pressure steam output pipeline between the above-mentioned three-way valve and the outlet of the medium-pressure steam output pipeline, and a second automatic control valve is fixedly installed on the low-pressure steam output pipeline. Both the first automatic control valve and the second automatic control valve are electrically connected to the DCS controller.

[0011] The lower inlet of the sewage sampling cooler is fixedly connected with a desalted water inlet pipeline, and the upper outlet of the sewage sampling cooler is fixedly connected with a desalted water outlet pipeline.

[0012] The sewage collection pipeline is fixedly connected with a sewage discharge water inlet pipeline, and the sewage collection pipeline between the sewage discharge water inlet pipeline and the water collection tank is fixedly connected with a primary brine removal pipeline.

[0013] The utility model has a reasonable and compact structure, is easy to use, increases the output of by-product steam of the hydrogen chloride synthesis furnace, reduces production costs and the adverse effects of steam exhaust on the on-site environment and personnel inspections, and has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the process flow of the utility model.

[0015] Attached Figure 1The codes are as follows: 1 is a hydrogen chloride synthesis furnace, 2 is a steam flash tank, 3 is a sewage sampling cooler, 4 is a water collecting tank, 5 is a hydrogen chloride inlet pipeline, 6 is a chlorine inlet pipeline, 7 is a hydrogen inlet pipeline, 8 is a steam delivery pipeline, 9 is a hot water pipeline, 10 is a pure water inlet pipeline, 11 is a medium-pressure steam output pipeline, 12 is a condensate pipeline, 13 is a sewage collection pipeline, 14 is a three-way valve, 15 is a low-pressure steam output pipeline, 16 is a first regulating valve, 17 is a remote pressure gauge, 18 is a second regulating valve, 19 is a remote level gauge, 20 is a vent valve, 21 is a desalted water inlet pipeline, 22 is a desalted water outlet pipeline, 23 is a first automatic control valve, 24 is a second automatic control valve, 25 is a sewage inlet pipeline, 26 is a desalted water pipeline, and 27 is a third automatic control valve. DETAILED DESCRIPTION

[0016] 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.

[0017] In the present invention, unless otherwise specified, the equipment and devices used are all the equipment and devices known and used in the art.

[0018] 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

[0019] The present invention is further described below in conjunction with the embodiments and drawings:

[0020] Embodiment 1: As attached Figure 1As shown, the device for increasing steam production and reducing external discharge comprises a hydrogen chloride synthesis furnace 1, a steam flash tank 2, a wastewater sampling cooler 3 and a water collecting tank 4, the upper inlet of the hydrogen chloride synthesis furnace 1 is fixedly connected with a hydrogen chloride inlet pipeline 5, the first inlet at the bottom of the hydrogen chloride synthesis furnace 1 is fixedly connected with a chlorine inlet pipeline 6, the second inlet at the bottom of the hydrogen chloride synthesis furnace 1 is fixedly connected with a hydrogen inlet pipeline 7, the upper outlet of the hydrogen chloride synthesis furnace 1 and the upper inlet of the steam flash tank 2 are fixedly connected with a steam delivery pipeline 8, the lower outlet of the steam flash tank 2 and the first inlet at the bottom of the hydrogen chloride synthesis furnace 1 are fixedly connected with a steam delivery pipeline 8, and the lower outlet of the steam flash tank 2 and the lower first inlet of the hydrogen chloride synthesis furnace 1 are fixedly connected with a steam delivery pipeline 8. A hot water pipeline 9 is fixedly connected between them, a pure water inlet pipeline 10 is fixedly connected to the second inlet at the lower part of the hydrogen chloride synthesis furnace 1, a medium-pressure steam output pipeline 11 is fixedly connected to the top outlet of the steam flash tank 2, a condensate pipeline 12 is fixedly connected between the bottom outlet of the steam flash tank 2 and the top inlet of the sewage sampling cooler 3, a sewage collection pipeline 13 is fixedly connected between the top outlet of the sewage sampling cooler 3 and the top inlet of the water collecting tank 4, a three-way valve 14 is fixedly installed on the medium-pressure steam output pipeline 11, and a low-pressure steam output pipeline 15 is fixedly connected to the upper port of the three-way valve 14.

[0021] The above-mentioned device for increasing steam production and reducing exhaust can be further optimized and / or improved according to actual needs:

[0022] Embodiment 2: It is different from Embodiment 1 in that: Figure 1 As shown, a DCS controller is also included. A first regulating valve 16 is fixedly installed on the medium-pressure steam output pipeline 11 between the three-way valve 14 and the steam flash tank 2. A remote pressure gauge 17 is arranged on the top of the steam flash tank 2. The first regulating valve 16 and the remote pressure gauge 17 are both electrically connected to the DCS controller, and an interlock is arranged between the first regulating valve 16 and the remote pressure gauge 17.

[0023] As required, through the interlock between the first regulating valve 16 and the remote pressure gauge 17, when the pressure in the steam flash tank 2 is high, the pressure in the steam flash tank 2 can be controlled to be stable by adjusting the opening of the first regulating valve 16.

[0024] Embodiment 3: It differs from Embodiment 1 to Embodiment 2 in that: Figure 1 As shown, a second regulating valve 18 is fixedly installed on the pure water inlet pipeline 10, a remote liquid level gauge 19 is provided on the steam flash tank 2, and a third automatic control valve 27 is fixedly installed on the condensate pipeline 12. The second regulating valve 18, the third automatic control valve 27 and the remote liquid level gauge 19 are all electrically connected to the DCS controller, and an interlock is provided between the second regulating valve 18 and the remote liquid level gauge 19.

[0025] As needed, through the interlock between the second regulating valve 18 and the remote liquid level meter 19, when the liquid level in the steam flash tank 2 is high, the opening of the second regulating valve 18 can be adjusted to adjust the amount of pure water entering the hydrogen chloride synthesis furnace 1, thereby controlling the amount of steam entering the steam flash tank 2 and achieving a stable liquid level in the steam flash tank 2.

[0026] Embodiment 4: It differs from Embodiments 1 to 3 in that: Figure 1 As shown, a vent valve 20 is also provided on the top of the steam flash tank 2. The vent valve 20 is electrically connected to the DCS controller, and an interlock is provided between the vent valve 20 and the remote pressure gauge.

[0027] Embodiment 5: It differs from Embodiments 1 to 4 in that: Figure 1 As shown, a first automatic control valve 23 is fixedly installed on the medium-pressure steam output pipeline 11 between the three-way valve 14 and the outlet of the medium-pressure steam output pipeline 11, and a second automatic control valve 24 is fixedly installed on the low-pressure steam output pipeline 15. The first automatic control valve 23 and the second automatic control valve 24 are both electrically connected to the DCS controller.

[0028] As required, the first automatic control valve 23 and the second automatic control valve 24 can be used to realize automatic switching of the self-produced steam between the low-pressure pipe network and the medium-pressure steam external network during the baking period of the hydrogen chloride synthesis furnace 1.

[0029] Embodiment 6: It differs from Embodiments 1 to 5 in that: Figure 1 As shown, the lower inlet of the sewage sampling cooler 3 is fixedly connected to a desalted water inlet pipeline 21, and the upper outlet of the sewage sampling cooler 3 is fixedly connected to a desalted water outlet pipeline 22.

[0030] According to the needs, desalted water is used as the cooling medium of the sewage sampling cooler 3 to realize energy recycling.

[0031] Embodiment 7: It differs from Embodiments 1 to 6 in that: Figure 1 As shown, the sewage collection pipeline 13 is fixedly connected with a sewage discharge water inlet pipeline, and the sewage collection pipeline 13 between the sewage discharge water inlet pipeline and the water collection tank 4 is fixedly connected with a primary brine removal pipeline 26 .

[0032] According to needs, the condensed water can be sent to the primary brine process for reuse after cooling treatment, thus realizing energy recycling and reducing the production costs of the enterprise.

[0033] As required, the pipelines and equipment of the high steam production and reduced exhaust device can be equipped with conventional valves, thermometers, pressure gauges, etc. known and used in the art according to production needs.

[0034] The DCS controller model may be the CS3000DCS controller produced by Yokogawa Corporation of Japan.

[0035] The utility model installs a three-way valve 14 at the medium-pressure steam outlet of the steam flash tank 2 and adds another pipeline, which can be automatically switched through the valve. During the baking period of the hydrogen chloride synthesis furnace 1, the self-produced steam can be incorporated into the low-pressure steam pipeline network for operation, thereby solving the problem of waste of by-product steam of the hydrogen chloride synthesis furnace 1 due to low pressure and external discharge during the baking period of the hydrogen chloride synthesis furnace 1, and realizing reasonable utilization of energy.

[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: the steam from the hydrogen chloride synthesis furnace 1 is sent to the steam flash tank 2 through the steam delivery pipeline 8. A part of the saturated steam produced after decompression is sent to the medium-pressure steam external network for reuse through the medium-pressure steam output pipeline 11, and the other part is sent to the steam network below for reuse through the low-pressure steam output pipeline 15. Among them, the steam condensate is sent to the sewage sampling cooler 3 through the condensate pipeline 12, and can be sent to the primary brine process for reuse after cooling treatment.

Claims

1. A device for increasing steam production and reducing exhaust, characterized in that The utility model comprises a hydrogen chloride synthesis furnace, a steam flash tank, a sewage sampling cooler and a water collecting tank. The upper inlet of the hydrogen chloride synthesis furnace is fixedly connected with a hydrogen chloride air inlet pipeline, the first inlet at the bottom of the hydrogen chloride synthesis furnace is fixedly connected with a chlorine air inlet pipeline, the second inlet at the bottom of the hydrogen chloride synthesis furnace is fixedly connected with a hydrogen air inlet pipeline, the upper outlet of the hydrogen chloride synthesis furnace and the upper inlet of the steam flash tank are fixedly connected with a steam delivery pipeline, the lower outlet of the steam flash tank and the first inlet at the bottom of the hydrogen chloride synthesis furnace are fixedly connected with a hot water pipeline, the second inlet at the bottom of the hydrogen chloride synthesis furnace is fixedly connected with a pure water inlet pipeline, the top outlet of the steam flash tank is fixedly connected with a medium-pressure steam output pipeline, the bottom outlet of the steam flash tank and the top inlet of the sewage sampling cooler are fixedly connected with a condensate pipeline, the top outlet of the sewage sampling cooler and the top inlet of the water collecting tank are fixedly connected with a sewage collection pipeline, a three-way valve is fixedly installed on the medium-pressure steam output pipeline, and the upper port of the three-way valve is fixedly connected with a low-pressure steam output pipeline.

2. The device for increasing steam production and reducing exhaust according to claim 1, characterized in that It also includes a DCS controller. A first regulating valve is fixedly installed on the medium-pressure steam output pipeline between the three-way valve and the steam flash tank. A remote pressure gauge is arranged on the top of the steam flash tank. The first regulating valve and the remote pressure gauge are both electrically connected to the DCS controller. An interlock is arranged between the first regulating valve and the remote pressure gauge.

3. The device for increasing steam production and reducing exhaust according to claim 2, characterized in that A second regulating valve is fixedly installed on the pure water inlet pipeline, a remote level gauge is provided on the steam flash tank, the second regulating valve and the remote level gauge are both electrically connected to the DCS controller, and an interlock is provided between the second regulating valve and the remote level gauge.

4. The device for increasing steam production and reducing exhaust according to claim 2 or 3, characterized in that A vent valve is also provided on the top of the steam flash tank. The vent valve is electrically connected to the DCS controller, and an interlock is provided between the vent valve and the remote pressure gauge.

5. The device for increasing steam production and reducing exhaust according to claim 1, 2 or 3, characterized in that A first automatic control valve is fixedly installed on the medium-pressure steam output pipeline between the three-way valve and the outlet of the medium-pressure steam output pipeline, and a second automatic control valve is fixedly installed on the low-pressure steam output pipeline. Both the first automatic control valve and the second automatic control valve are electrically connected to the DCS controller.

6. The device for increasing steam production and reducing exhaust according to claim 4, characterized in that A first automatic control valve is fixedly installed on the medium-pressure steam output pipeline between the three-way valve and the outlet of the medium-pressure steam output pipeline, and a second automatic control valve is fixedly installed on the low-pressure steam output pipeline. Both the first automatic control valve and the second automatic control valve are electrically connected to the DCS controller.

7. The device for increasing steam production and reducing exhaust according to claim 1, 2, 3 or 6, characterized in that The lower inlet of the sewage sampling cooler is fixedly connected with a desalted water inlet pipeline, and the upper outlet of the sewage sampling cooler is fixedly connected with a desalted water outlet pipeline.

8. The device for increasing steam production and reducing exhaust according to claim 4, characterized in that The lower inlet of the sewage sampling cooler is fixedly connected with a desalted water inlet pipeline, and the upper outlet of the sewage sampling cooler is fixedly connected with a desalted water outlet pipeline.

9. The device for increasing steam production and reducing exhaust according to claim 5, characterized in that The lower inlet of the sewage sampling cooler is fixedly connected with a desalted water inlet pipeline, and the upper outlet of the sewage sampling cooler is fixedly connected with a desalted water outlet pipeline.

10. The device for increasing steam production and reducing exhaust according to claim 9, characterized in that The sewage collection pipeline is fixedly connected with a sewage discharge water inlet pipeline, and the sewage collection pipeline between the sewage discharge water inlet pipeline and the water collection tank is fixedly connected with a primary brine pipeline.

Images